Wonder if you’ll get Huntington’s disease? Preparing for the big, ‘intensely personal’ decision to undergo predictive testing

One of the most daunting challenges facing families affected by Huntington’s disease involves genetic testing.

Huntington’s is a 100-percent genetically caused disease, and it now can be foreseen – but not yet cured or treated. All humans have the huntingtin gene, which is essential for life. HD’s devastating, ultimately deadly symptoms are caused by a specific mutation (called a “CAG repeat expansion”) in the gene. Definitive testing for HD became available after the historic discovery of the gene in 1993.

Because every child of an affected HD parent has a 50-50 chance of inheriting the expanded gene, the mere decision to test is often frightful. A positive test result for the expansion means not only that the tested person will develop HD, but carries an added burden: the knowledge that both immediate and extended family members are also at risk of carrying the expansion.

Three scenarios

A person showing no symptoms, or suspecting symptoms, undergoes a predictive test, that is, to see whether the individual carries the expansion and therefore might have HD or later develop it. (Diagnostic testing confirms whether a person already displaying symptoms has HD. Prenatal testing determines whether a fetus or embryo carries the expansion.)

These three scenarios were poignantly portrayed in the July 3 ABC News feature “Living with Huntington’s Disease.” The 15-minute program focused on the stories of Scott and Kelsey Porter and Justin Furstenberg, who received his test result on camera (starkly reminiscent of the film The Lion’s Mouth Opens.)

The report’s detailed, deeply personal rendering of the genetic testing process also illustrated how HD families rely on supportive genetic counseling and psychological and medical assistance – as well as solid scientific information – to navigate the many challenges involved.

Scott and Kelsey Porter in a Huntington's Disease Society of America video

According to recommended guidelines, individuals like the at-risk Kelsey must prepare for this procedure by speaking to a genetic counselor and a mental health professional, and should have a support person (such as a spouse or close friend) physically present throughout the process. For testing in the United States, this “protocol” was established by the Huntington’s Disease Society of America (HDSA). It was most recently updated in 2016. Testing centers should do the utmost to ensure confidentiality, especially since news of a positive test can risk changing perceptions in the workplace and elsewhere, even if there are new guarantees against genetic discrimination.

Testing centers often intentionally slow the testing process, so that there is time for the individual to reconsider the decision to be tested, to think about the potential downside of testing, and to prepare for the impact of the result. Because of survivor’s guilt and other psychological factors, a negative test result can also prove traumatic and disruptive to a person’s relationships with family and friends.

In my quarter century of attending the local monthly HDSA support group and advocating for the HD cause, the topic of predictive genetic testing and its many implications has come up regularly. My own family faced all three modes of tests over five years: my mother’s positive diagnostic test in 1995, my positive predictive test in 1999, and my daughter’s negative prenatal test in late 1999/early 2000. (Click here for details of my family’s fight against HD.)

Based on these experiences and my study of the many related issues, this article provides an overview of key steps and resources for people preparing for HD testing, in particular the predictive type.

Helpful HDSA resources

HDSA, in addition to its genetic testing protocol, provides a brochure to HD families, Genetic Testing Huntington’s Disease, that in simple language answers basic questions about the disease, testing procedures, and resources.

The brochure emphasizes a cardinal rule that I learned early in my family’s journey with HD, and which I have repeated to other HD family members coming to grips with disease for the first time:

“The decision to undergo genetic testing is an intensely personal one that cannot be taken lightly. Testing should never be forced on an at-risk individual. There are no ‘right’ or ‘wrong’ answers. Each individual will have to take his/her own circumstances into consideration before making the decision.”

The HDSA family guide to genetic testing (copyright, HDSA)

The HDSA website furnishes valuable information on “genetic testing and your rights,” including the Genetic Information Nondiscrimination Act of 2008 (GINA). As explained on the site, GINA prohibits “health insurance companies and group health plans from denying coverage or charging a higher premium based on genetic information.” It also “prohibits employers from using an employee’s genetic information to discriminate when making employment decisions about hiring, firing, promotion, or terms of employment.”

In chapter 2 of HDSA’s A Physician’s Guide to the Management of Huntington’s Disease, leading HD specialist Martha Nance, M.D., provides additional critical information about testing and counseling. The chapter includes a detailed medical discussion of HD genetics.

A diagnosis of HD “affects the entire extended family,” Dr. Nance writes. “The person who is diagnosed with HD grieves not only for himself, but also for his at-risk children, and a young adult child caring for an affected parent understands that the parent’s disease could one day affect him.”

Dr. Nance stresses the importance of “accurate information” necessary for families to make “informed decisions” about genetic testing and family, financial, and life planning. Unfortunately, even decades after the discovery of the gene, “misinformation and misunderstandings” about HD genetics are still common, she notes.

(You can also watch a panel discussion titled “Looking to the Future: Life After Testing,” held at HDSA’s 35th annual convention, which took place online last month.)

Moving towards ‘genetic education’

In 2018, the international Huntington’s Disease Youth Organization (HDYO) added to its website a very readable “Genetic Testing Checklist,” covering key topics such as motivation for testing, coping with the test results, the testing process, and key things to do before testing, such as lining up insurance coverage (discussed below). This resource echoes many of the points made in HDSA materials.

In 2019, veteran University of Washington neurologist Thomas D. Bird, M.D., published Can You Help Me? Inside the Turbulent World of Huntington Disease, a book based on his more than 40 years’ experience seeing HD patients and their families. It includes detailed discussion of the many issues involved in what Dr. Bird calls the “genetic testing conundrum.”

Individuals contemplating genetic testing will find many valuable stories in Dr. Bird’s book. He describes the gamut of people’s reactions to testing – from individuals who have tested negative but still require a while for it to “sink in,” to (sadly) the risk for suicide among people testing positive.

“Suicide represents the cause of death in about 5-6% of persons with HD – five times higher than the national average,” Dr. Bird explains. “It can happen at any time but it is most common when a person at risk decides he or she is developing symptoms.”

Dr. Bird observes, crucially, that the “genetic test result is not black and white, all or nothing.” This reflects the latest genetic research on HD, which has demonstrated that the age of onset of symptoms is driven not just by the severity of the mutation but also by modifier genes (click here to read more).

This is why Dr. Bird stresses a comprehensive understanding of genetic counseling.

“Some people don’t like the term counseling,” he writes. “It sounds too much like psychotherapy, and they are wary of that. In fact, genetic counseling does sometimes have a heavy dose of psychotherapy, but it entails much more. Perhaps the best word would be education – genetic education.”

(I will review Can You Help Me? more fully in a future article.)

Ten key steps 

With these resources in mind, I list below ten key steps in preparing for a predictive genetic test and dealing with its short- and long-term consequences. These are my personal thoughts; this list is not meant to be exhaustive or official. Individuals should always consult their physicians. Each individual’s situation is unique.

1. Learn as much as you can about HD by studying the resources cited in this article, as well as others.

2. Join a support group, where you can learn from and share ideas with others confronting HD, as well as from facilitators and health professionals.

3. Contact the nearest HDSA Center of Excellence (or other HD or neurology clinic), where you can obtain information about testing and clinical services. You also can become involved in critical efforts towards treatments such as clinical trials and research studies like Enroll-HD. 

4. Know your rights regarding genetic testing and healthcare access under federal, state, and local law in your country of residence, and, in the U.S., learn about GINA.

5. Obtain life, disability, and/or long-term care insurance prior to testing. GINA does not protect consumers in these areas. In 1999, before testing, I was able to secure a long-term care policy with lifetime coverage. Since then, the long-term care market has gone into crisis, with many fewer policies issued, and far more limited coverage (click here and here to read more). At the time, I found it very helpful to work with an insurance broker recommended by an insurance agent specializing in long-term care who had been a guest speaker at the HD support group.

6. Set up a will, an advanced directive for end-of-life care, and, if appropriate, a living will to help protect assets. Also plan for the potential impact of HD on family finances by consulting a trusted financial advisor.

7. Research and select the testing center for your genetic test, including the cost of the procedure, which can run from a few hundred dollars to more than $1,000. (Some HDSA Centers of Excellence offer free or reduced pricing on testing. One foundation has paid for in vitro fertilization of non-HD-affected embryos but temporarily suspended grants because of the COVID-19 pandemic.) Some HD family members have criticized the quality of guidance provided at some centers. Be your own best advocate, and don’t be afraid to ask questions.

8. Find a trusted family member or friend to be your support person.

9. Build a relationship with a trusted psychotherapist.

10. Become active in HDSA and/or other advocacy organizations.

With potential treatments, an expected boom in testing

As the geneticist who revealed my test results in 1999 stated, “a positive test is not a diagnosis.” Physicians and scientists underscore this point. Like me, many people live years and even decades after their test before symptoms start.

Currently, no more than ten percent of at-risk individuals choose to be tested. The vast majority fear a potentially depressing result, “and there is no means of prevention,” Dr. Bird observes.

However, as clinical trials such as the historic GENERATION HD1 proceed, the potential for the first effective treatments has grown significantly.

Indeed, doctors and HD clinics are preparing for the likely boom in testing for the HD mutation that will occur if GENERATION HD1 or trials of other possible disease-modifying treatments are successful, as people seek to learn their status before starting on a treatment. (Click here and here to read more.)

More than ever, people seeking HD predictive testing and their families will need what Dr. Bird describes as “an experienced, compassionate team to help them through this challenge.”

A time for hope: HDSA’s 50th anniversary, a record-setting gala, and the impending release of highly anticipated clinical trial results

This year, Pope Francis’ historic “Hidden No More” audience with the Huntington’s disease community has understandably overshadowed another milestone in the HD cause: the 50th anniversary of the Huntington’s Disease Society of America (HDSA).

However, on November 4 the spirit of HDSA, embodied in founder Marjorie Guthrie’s goal of a cure, helped fuel new hopes: the San Diego chapter’s sixteenth gala, recalling HDSA’s start in 1967 and honoring celebrated ESPN sportscaster Chris Berman, raised more than $250,000, a national record for chapters. It was the society’s most successful fundraising event of the last decade.

Also, for the first time, the gala attendees included top scientists from Ionis Pharmaceuticals, Inc., which, by January 2018, expects to release results of its highly anticipated Phase 1 gene-silencing clinical trial.

It was also the first time an HDSA chairman of the board attended: Chair Arik Johnson, Psy.D., the staff psychologist at the HDSA Center of Excellence at the University of California, Los Angeles, joined HDSA CEO Louise Vetter at the event.

It was a striking convergence of history, people, and research progress.

The gala was organized by HDSA-San Diego and the chapter’s former president, Bill Johnston. Johnston left a 38-year career as PR director for the San Diego Chargers football team, which moved to Los Angeles, to keep his HD-stricken wife Ramona at Edgemoor Hospital, an award-winning care facility in nearby Santee. Johnston now works as special advisor to Ron Fowler, the executive chairman and co-owner of the San Diego Padres baseball team and a long-time supporter of HDSA-San Diego.

“It was so rewarding to see the extended HD community having a wonderful evening and enjoying a series of heartfelt and humorous stories about Marjorie Guthrie, the Johnstons and the 2017 Guthrie Awardee, Chris Berman,” HDSA-San Diego President Beth Hoffman, Ph.D., said after the event. “Generosity was in the air, and we’re so grateful to everyone who dug deep to support HD families and to find a cure for HD.”

HDSA CEO Louise Vetter addressing the gala (photo by Derrick Tuskan)

Marjorie Guthrie’s vision for a cure

More than 300 people attended the gala, held at the Pendry San Diego Hotel, including members of the Padres organization, sports and local celebrities, drug company representatives, HD researchers and clinicians, and HD family members.

In her speech, Vetter described HD’s devastating symptoms, its impact on families, and the story of Guthrie’s founding of what would become HDSA after her husband, folk singer and social activist Woody Guthrie, died of HD in 1967. Guthrie began in a time before the Internet: she placed a classified ad in The New York Times seeking contact with other families affected by a disease mainly unknown, even to New York’s medical community.

“In three months, she had 35 families affected by Huntington’s disease that were meeting around her kitchen table and dreaming about developing a cure for HD,” Vetter said. “That’s how the Huntington’s Disease Society of America was born. And at 50 years, we mark the amazing vision that this woman had to really set a course for a community to come together and provide support for one another.”

Today HDSA provides education about HD, supports research, and advocates for better care for HD-affected individuals, Vetter added. It now has more than 40 Centers of Excellence (COE), which provide a variety of family services and involve the community in research studies and clinical trials.

In a pre-gala interview, board chair Johnson outlined some of the ways in which HDSA and COEs are assisting affected individuals and families with HD’s daunting psychological and behavioral symptoms. “We have a Telehealth program for people to call in and talk to a trained social worker or psychologist who has been educated in Huntington’s disease,” he said.

You can watch Vetter’s speech in the video below. Click here to watch my interview with Dr. Johnson.

At 50, HDSA striving for founder Marjorie Guthrie's goal of a cure from Gene Veritas on Vimeo.

‘A heart for people that need a voice’

After the audience watched an ESPN report on the Johnston family’s struggles and leadership of the cause, Johnston received a standing ovation as he approached the podium. Johnston’s daughter Hayley, who has not tested for the inheritable genetic defect that causes HD, appears in the video.

“If my wife were here, then it would make sense that you’re standing up,” Johnston told the audience, explaining that Ramona’s advanced symptoms caused her to miss the event for the first time. “My wife is my hero. I appreciate everybody being here tonight. Hayley said it in that video about this disease: people don’t really know what it is until you see it. I wish Ramona could be here. She would be here, if she could.”

Johnston noted that Berman and Fowler have been the “biggest” and “most consistent” contributors to his fundraising efforts. Fowler was honored at the 2013 San Diego gala.

Johnston recalled his friendship with Berman, begun in the 1980s when he started at the Chargers and Berman was at ESPN. Starting in the 1990s, around 6 a.m. every Sunday during football season, Johnston updated Berman on Chargers news for the sportscaster’s reports.

“We just talked football,” Johnston said. “And then when Ramona got diagnosed, I could not have that conversation without him asking first how was Ramona, how are the kids. Every year, at the end of the year, a check would show up in the mail, unannounced, unrequested, a donation. Our honoree has been a huge friend of our organization and the effort to find a cure, find a treatment, for this disease.”

Berman does more than write checks, Johnston added. Berman, he said, “shows to me a commitment and a caring and a heart for people that need a voice, and that’s what this disease needs. It needs people to talk about it, to learn about it. And that’s why we’re doing what we’re doing here tonight.”

Bill Johnston (left) and 2017 Guthrie Award Honoree Chris Berman (photo by Derrick Tuskan)

‘Advancing the ball’ for HDSA

In accepting the Guthrie Award, Berman praised Johnston’s commitment.

“Billy is as loyal as they come,” he said, referring to Johnston’s decision to stay in San Diego. “Is there anything more admirable than that?”

Berman recalled that, after his wife’s death in a car accident in May, Johnston flew to the East Coast for the funeral. Johnston and other “true friends” have helped him overcome his grief, he said.

“You realize that, when times are the toughest, your friends and people bonding together is the way we all can advance the ball, if you will, to use a football term. They’ve helped me do that. And that’s where we are with Bill, and Hayley, who’s here tonight, and the Johnston family and countless other families just like this family.”

You can watch Johnston’s and Berman’s remarks in the video below.

Chris Berman: 'Let's advance the ball to cure Huntington's disease' from Gene Veritas on Vimeo.

Baking the clinical trial cake

Earlier, I watched as Ionis scientists bid on silent auction items using a mobile phone app. I greeted several of the Ionis officials, including Frank Bennett, the senior vice president for research, who attended the gala for the first time.

Dr. Bennett has overseen the ten-year development of IONIS-HTT_Rx, a gene-silencing drug that aims to alleviate HD symptoms by reducing production of the huntingtin protein in brain cells. The drug entered a Phase 1 clinical trial in September 2015 in Canada, England, and Germany. The company expects results to become available in the next two months.

Currently, to protect against bias as clinical trial administrators analyze the results, Dr. Bennett and the Ionis HD team cannot access the data. That’s standard clinical trial protocol.

Recalling a metaphor used in formal interviews about IONIS-HTT_Rx, Dr. Bennett referred to the project as a “cake in the oven.” The team is awaiting the opening of the oven to learn the results.

If successful, IONIS-HTT_Rx would mark the first effective treatment – though not a cure – for a brain disease.

The Ionis Pharmaceuticals table: (clockwise from left) Chris Bragg, Stacy Raysin (Dr. Bennett's assistant), Eric Swayze, Ph.D., Carolyn Swayze, Lisa Lane, Roger Lane, M.D., Brad Smith, Anne Smith, Ph.D., Frank Bennett, Ph.D., and Paula Bennett (photo by Gene Veritas, aka Kenneth P. Serbin)

Close to treatments

Jody Corey-Bloom, M.D., Ph.D., the director of the COE at the University of California, San Diego, also attended with her husband Floyd Bloom, M.D., staff, and members of the HD community. So did representatives of Teva Pharmaceutical Industries, a major sponsor of HDSA galas and the manufacturer of AUSTEDO, a recently approved drug – developed in San Diego – that alleviates HD’s involuntary movements but does not slow progression of the disease.

On October 30, Dr. Corey-Bloom gave her annual Huntington’s disease research update at the HDSA-San Diego support group. Most of her talk focused on gene silencing and the Ionis trial.

She also spoke on her groundbreaking research on the presence of huntingtin protein in saliva – a potential marker of both disease onset and progression and also of medications’ impact. Saliva is easier and far safer to collect than blood and cerebrospinal fluid, which are also under study for markers. (Click here for a scientific presentation on this topic.)

“This is an incredibly exciting time for HD,” Dr. Corey-Bloom concluded. “I think really we’re on the edge of really discovering something here, and being able to treat this disease. If we can’t cure it, we can slow it down.”

To watch Dr. Corey-Bloom’s presentation, click here.

Dr. Jody Corey-Bloom's table: (clockwise from front) HD family member Linda Pohl, Pablo Garcia, Lily Garcia (Dr. Corey-Bloom's assistant), Steve Granger, Ph.D., chief scientific officer at Salimetrics, LLC, Beth Thomas, Ph.D., The Scripps Research Institute, Dr. Corey-Bloom, Floyd Bloom, M.D., and HD family member Margaret Schroeder (photo by Gene Veritas, aka Kenneth P. Serbin) 

A true celebration of hope

I’ve attended every San Diego gala but one. As always, it was simultaneously exhilarating and emotionally draining.

I was thrilled to see the especially large group of scientists, researchers, and clinical workers. I was able to introduce several of these mutual contacts to each other. I also enjoyed listening to Berman talk about his career as a broadcaster, one of the highlights of the evening (click here to watch an excerpt).

When I greeted Johnston, I told him that my recent, annual neurological checkup showed no signs of HD. I’m 57; my HD-stricken mother’s symptoms started in her late 40s.

However, seeing “HD brothers and sisters” like Tim Schroeder and Sharon Shaffer, both deeply affected by the disease, reminded me of my likely future unless a treatment is found soon.

Yet this gala lived up to its name: a celebration of hope. My heart jumped as I realized it would set a fundraising record.

I’m hoping it will jump even more when the Ionis Phase 1 results come out.

Above, from left to right, Fran Walker, daughter Sharon Shaffer (seated), Taylor Shaffer, Renato, Shaffer, and Alexa Shaffer (photo by Gene Veritas, aka Kenneth P. Serbin). Below, Gene Veritas with HDSA-San Diego supporter Mary Wisco (photo by Bob Walker).

(Disclosure: I hold a symbolic amount of Ionis shares.) 

(Scroll down for other photo highlights.)

Chris Berman (left) and Ron Fowler, executive chairman and co-owner of the San Diego Padres (photo by Derrick Tuskan)

HDSA-San Diego president Beth Hoffman, Ph.D., (left) and Beth A. Thomas, Ph.D., The Scripps Research Institute (photo by Gene Veritas, aka Kenneth P. Serbin)

Mike and Jan Neil, HDSA-San Diego supporters (photo by Gene Veritas)

Nina Detrow (left), KGTV news anchor Kimberly Hunt, and Lori Ello (photo by Gene Veritas)

Bill and Hayley Johnston (left) with Liya Sharif and Pete Lancia of Qualcomm (photo by Gene Veritas)

The HDSA San Diego Center of Excellence/UC San Diego/Teva table: clockwise, starting in the foreground, Ameera Haque (UCSD research assistant), Gayle Paddison (Teva clinical nurse educator), Mr. Paddison, Amy Rahilly, Jeff Rahilly (Teva), Aeri Kim (UCSD research assistant), Chase Snell (UCSD research coordinator), Sungmee Park (UCSD research coordinator), Ayesha Haque (UCSD research assistant), and Rina Patel (UCSD research assistant) (photo by Gene Veritas)

HDSA-San Diego board member Paul June (middle) with supporters Amy and Cam Stephens (photo by Gene Veritas)

Scott Yoffe and HDSA-San Diego board member Nan Pace (photo by Gene Veritas)

HD family member Doug Schulte (photo by Gene Veritas)

Former HDSA-San Diego president George Essig (standing) toasts with friends (photo by Derrick Tuskan).

Ionis Phase I Huntington’s disease trial at halfway mark: ‘No surprises so far’ means good news

At its halfway mark, Ionis Pharmaceuticals' historic Huntington’s disease Phase 1 gene-silencing clinical trial is on track to finish as scheduled in late 2017, company officials said in an interview on September 26.

“What we can say is that the trial is going well,” said Frank Bennett, Ph.D., Ionis senior vice president of research and the franchise leader for the company’s neurology programs.

Dr. Bennett added that no “issues” have arisen so far in the Phase 1 safety and tolerability study of its drug IONIS-HTT_Rx in patients with early HD. IONIS-HTT_Rx aims to reduce the production of huntingtin protein in brain cells. This approach, if it advances to Phases 2 and 3, may have the potential to slow, halt or perhaps even reverse the progression of HD symptoms. The trial began in September 2015, with participants in England, Germany, and Canada.

The Ionis HD team explained that the Phase 1 trial is not assessing the drug’s efficacy. Each patient in the trial receives the drug for just three months – not long enough to gauge any impact on symptoms.

Furthermore, the trial is “double-blinded”: trial participants, trial administrators, and Ionis scientists do not know who is getting the drug or a placebo. This insures that bias and other external factors don’t affect the trial results.

Nevertheless, the absence of problems is good news.

No surprises have occurred to date, commented Anne Smith, Ph.D., the Ionis director of clinical development and the individual responsible for the day-to-day management of the trial.

“It’s blissfully quiet,” Dr. Smith said. “You don’t want surprises in clinical trials. Most surprises in safety trials are bad surprises. This one is surprise-free to date.”

Also, trial participants had no difficulties with the delivery of the drug via injections into the spine (so-called intrathecal injections), added Roger Lane, M.D., the Ionis vice president for neurology clinical development and one of the designers of the trial.

Watch my reaction after the interview at Ionis headquarters on September 27 in the video below.

Ionis Phase I HD Trial at Halfway Mark: 'No Surprises So Far' Means Good News from Gene Veritas on Vimeo.

Phase 2 could start in 2018

“We’re continuing to enroll patients in the study,” Dr. Bennett said. A total of 36 patients divided into four cohorts – each subsequent cohort taking a higher dose of IONIS-HTT_Rx – will participate in the trial.

Ed Wild, M.D., Ph.D., one of the administrators of the trial at University College London, announced in June at the annual convention of the Huntington’s Disease Society of America in Baltimore that the third cohort had received permission to receive the drug. (Click here to watch a video of Dr. Wild’s presentation.)

“This is a new therapy, and we want to make sure that we’re doing no harm,” Dr. Bennett emphasized. “Everything is geared towards the safety of the drug at this stage.”

If Phase 1 confirms safety and tolerability, a year-long Phase 2 trial to measure efficacy in a larger number of patients likely would start in 2018, Dr. Bennett said.

Infants on an Ionis SMA drug living longer

The update provided by the Ionis HD team came in the wake of further validation of the company’s scientific approach.

Ionis makes antisense oligonucleotides (ASOs, artificial strands of DNA) that alter the expression of genes and can therefore potentially serve as treatments for genetic diseases. On August 1, Ionis and its partner Biogen actually halted a Phase 3 trial of an Ionis ASO (nusinersen) in infants with spinal muscular atrophy (SMA) because the drug, which increases the level of a key protein, was working so well.

On September 27, Biogen announced that it had completed its application for priority review of nusinersen by the U.S. Food and Drug Administration (FDA).

Like HD, SMA is a genetic neurodegenerative disorder. It primarily affects children, who “end up becoming paralyzed over time,” Dr. Bennett explained, and become vulnerable to respiratory infections or other diseases. Children diagnosed with the most severe form of SMA generally live less than a year, he said. In a less severe form of SMA, children lose the ability to walk over time as they grow up, Dr. Bennett added.

“I think the surprising thing that we found – and this was evidence early in the program – was that we didn’t just stop the decline in these patients, but we actually reversed it,” Dr. Bennett said. “That was really unexpected. I should say that they’re not cured of the disease, but they’re doing much better now than expected. They are surviving longer based on the natural history of the disease.”

These results demonstrated the body’s capacity to mend once the cause of a disorder is removed, he observed.

“We’re hopeful that will also occur in Huntington’s,” Dr. Bennett affirmed. “We have to demonstrate it, but I think there’s a precedent now in these neurodegenerative diseases. If you remove the insult or the toxicity, you can recover function.”

Dr. Frank Bennett of Ionis makes a point during discussion of the company's Phase 1 clinical trial for a Huntington's disease treatment (photo by Kristina Bowyer, Ionis)

Preparing for the HD clinical study

In the Phase 1 IONIS-HTT_Rx trial, clinical trial investigators are collecting some information about the drug’s effect on biomarkers (indicators of a disease mechanism or drug impact) that may help the team design a potential Phase 2.

According to Dr. Lane, before a patient receives each of the four planned doses, the trial administrators collect samples of cerebrospinal fluid (CSF) that will be used to measure levels of huntingtin protein and a variety of other protein markers of neuronal injury and inflammation. Patients also undergo brain scans to look at the volumes of, and the connectivity between, different parts of the brain that are known to be affected in HD.

Another biomarker is neurofilament, described by Dr. Bennett as a protein involved in the cytoskeleton or internal “scaffold” of neurons.  “It’s something very specific to neurons,” said Holly Kordasiewicz, Ph.D., the Ionis director of neuroscience drug discovery, who participated in selecting the ASO, researched it in animals, and is developing biomarker tests for the Phase 1 study. “When the neurons are damaged, neurofilament is released. In a number of neurodegenerative diseases, neurons are dying and neurofilament levels go up.”

In HD, brain cells die. In a clinical study, a decrease in neurofilament would suggest that the drug is protecting neurons, Dr. Kordasiewicz added.

Ionis Huntington's disease clinical trial planners Dr. Anne Smith (left), Dr. Roger Lane, and Dr. Holly Kordasiewicz meet with Gene Veritas (in green shirt) on September 26, 2016, to provide an update on the company's Phase 1 HD trial (photo by Kristina Bowyer of Ionis)

Getting the design of Phase 2 right

The participants in the IONIS-HTT_Rx study undergo a battery of tests that assess memory, thinking, movement, behavior problems, and abilities to perform every-day activities. This is in preparation for use of such measures in a potential Phase 2.

“We’re trying to get the information to design the best efficacy study that we can,” said Dr. Kordasiewicz. “A really sad outcome would be failure of an efficacy study due to the wrong design, not because the drug’s not working. You have to be sure you’re picking the right dose and the right endpoints for the efficacy study.  That’s why all the extra stuff goes into these Phase 1 trials, so that you can get the design right and have the best shot at giving the drug the best chance at working.”

The large burden of work on patients and trial administrators in Phase 1will ultimately allow Ionis (and its partner Roche) to “simplify” potential Phase 2 and 3 trials, making them quicker and making it easier for patients to participate, Dr. Bennett added.

Seeking answers to key questions

This is the first time that an HD gene-silencing drug is going into the human brain. In animals such as mice and non-human primates, the drug gets into both the cortex (the outer, main part of the brain, linked to consciousness) and the striatum (a part of the brain deep under the surface that is involved in movement). Both areas are affected by HD.

A key question for researchers: must IONIS-HTT_Rx reach the striatum to help alleviate HD?

According to Dr. Kordasiewicz, the latest research in HD mice (conducted by William Yang, M.D., Ph.D., of the University of California, Los Angeles) demonstrates that silencing the huntingtin gene in the cortex was more effective than silencing the gene in the striatum, but that silencing in both cortex and striatum was the most effective approach.

Another concern of scientists and HD patients and their families involves the abilities of the ASO, or gene-silencing drug. Should the ASO be designed to reduce only the so-called “bad,”mutant huntingtin? Or is it okay to reduce both the bad and the normal version, which is inherited from the unaffected parent? The IONIS ASO is expected to do the latter.

According to the Ionis HD team, the controversy over this question is diminishing. Studies in animals support the safety of approaches that reduce both mutant and normal huntingtin.  Additionally, Dr. Guohao Wang’s work in mice showed that eliminating huntingtin completely in later life did not have any adverse consequences.

“That was good evidence to support our approach,” said Dr. Lane.

Involving the U.S., thanking patients and families

Many in the HD community have asked: why didn’t Ionis conduct Phase 1 in the United States? And would a potential Phase 2 include Americans?

“I’d be surprised if the U.S. wasn’t involved in a Phase 2 study, as well as additional countries, but I don’t think we are in a position to say specifically which countries are going to be involved,” Dr. Bennett commented. “There were strategic decisions that caused us to go to Europe and Canada first. It’s not that we want to ignore the U.S.” He explained that it was faster to start a trial in Canada and Europe.

The Ionis HD team thanked the Phase 1 participants and their families for their involvement in the Phase 1 study.

“It’s been a very good community and very supportive of our efforts,” said Dr. Bennett. “We also want to thank them for their patience.”

(Disclosure: I hold a symbolic amount of Ionis shares.)

(Click on the links below for past coverage of the Ionis HD project.)

Chief Huntington's disease drug hunter: 'every confidence first treatments' in the works

Huntington's disease patients get first dosing in historic Isis Pharmaceuticals' gene-silencing drug trial

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Dreams for a better future: an opportunity we Huntington’s disease people and our families are denied

Because of its devastating medical and social impact, Huntington’s disease often forces affected individuals and their families to abandon their dreams.

After learning of my mother’s diagnosis for HD in 1995 and then testing positive for the deadly gene in 1999, I became aware of how the disease could damage family finances.

HD families not only lose the income of the affected individual; they also bear the costs of caring for that person, including nursing home fees. Sometimes the caregiver quits his or her own job in order to stay at home with the patient. Sometimes an exhausted caregiver even dies before the HD person.

Fearing such consequences, my wife Regina and I abandoned the idea of buying a retirement home in her native country of Brazil, in order to save more money to pay for my future care.

Our daughter tested negative for HD in the womb and is today a healthy 16-year-old. Unwilling to repeat the long and psychologically traumatic process of prenatal genetic testing, we decided to have no more children. That decision was especially painful for Regina.

Delving into the cause for a cure to save my deteriorating mother, I was compelled to add a new, fundamentally different dimension to my academic career: in addition to Brazilian history, I now also study the history of science, technology, and medicine. In this blog I have tracked the development of HD research, chronicled the HD cause as a social movement, and documented the new and harrowing human experience of living in the gray zone between a genetic test result and disease onset.

This new dimension has brought many rewards, but I often fantasize about what my career would be like if it weren’t for HD.

A diversion and a trigger

Brazil, my research passion, became simultaneously a diversion from and a potential trigger of HD onset. I eagerly looked forward to the escape to the wondrous culture of Brazil during my summer research trips.

However, with both HD and my intellectual legacy on my mind, each spring I prepared feverishly for those trips, packing into my schedule as many research tasks as possible – including meetings with Brazilian Huntington’s advocates. On the plane south, I worried about whether I was doing the best thing for my health. Relaxation and exercise in San Diego seemed more beneficial than living in hotels and eating restaurant food while exposing myself to the pollution and winter weather in the São Paulo megalopolis, where I did a lot of my work.

Facing HD, I couldn’t help but wonder if each trip might be my last.

Going international

As I became more deeply involved in HD advocacy and this blog over the past ten years, I lost some passion for Brazil research.

My mother’s death in 2006 figured heavily in that equation. As I watched her succumb to HD, I knew I would be the next to be stricken by the inevitable symptoms.

Research on Brazil sometimes seemed irrelevant. However, I kept at it, continuing a string of annual research visits stretching from 1986 to 2010, and again in 2013, 2015, and 2016. Today I consider myself bi-cultural, and my network of contacts in Brazil has made my HD advocacy international.

A new perspective

Lately, I’ve entered yet another stage of my journey with HD.

This year marked the tenth anniversary of my mother’s death. With time, memories of her struggle have become less frightening.

At the same time, something more important has occurred: at 56, the age at which my mother had involuntary movements and was losing her cognitive abilities, I have yet to develop any of the classic, visible signs of HD.

Scientists are getting closer to explaining the reasons for different age of onset in people like my mother and me who have the same degree of genetic defect (click here to read more). Unlike my mother, I’ve had the advantage of knowing that I carry the gene. So I have cared for my health more conscientiously.

After testing positive at age 39, I was convinced that I would by now have symptoms that would prevent me from working and traveling to Brazil.

I have been extremely lucky. As a result, my perspective has changed. I feel more optimistic about life because of the wonderful blessing of health that I currently enjoy.

Also, while in 1995 there was a dearth of potential HD remedies, today researchers run clinical trials in the quest for remedies to alleviate HD and perhaps even make it a manageable disease, thus allowing people to lead normal lives.

Having gotten this far, and looking back on two decades of advocacy, I am also somewhat more at peace with the fact that HD will inevitably strike me.

I know I am fighting the good fight. Ultimately, I cannot control my fate.

Taking a break from the cause

I took a break this summer from the HD cause. I devoted much of it to working on a long-gestating book project on former revolutionaries in power in Brazil, including Dilma Rousseff, the president of Brazil impeached in March and removed from office on August 31 by a vote of the Brazilian Senate. To grasp this important moment in Brazilian history, I have immersed myself in the events, including watching live video.

I had started the research on this project shortly after learning of my mother’s diagnosis. I had never imagined that at 56 I would still be able to write.

Focusing fully on Brazil again this summer, I felt in my element.

I did feel guilty this summer about not responding immediately to some requests for help from members of HD families.

However, I also recalled how many HD people give up on their dreams. I thought specifically of one asymptomatic gene carrier who decided to put advocacy aside and dedicate himself fully to a promising career.

“I have a right to self-fulfillment, too,” I told my psychotherapist. “I have given up so much because of HD. I really want to finish my book on Brazil.”

All HD-affected individuals and their families have the right to their own dreams!

That’s what we in the HD community are fighting to restore.

A stark reminder of HD

The gravity of our struggle hit home again on September 13, when Laura Rivard, Ph.D., invited me to attend a screening of the HBO documentary The Lion’s Mouth Opens in her course Ethical Issues in Genetics at the University of San Diego. (In a future article, I will explore HD and bioethics in the context of Dr. Rivard’s course.)

The film portrays filmmaker-actress Marianna Palka’s decision to test for HD. Before class, Dr. Rivard’s students also watched a video of me, produced by one of her former students, in which I discuss my own experiences with genetic testing (click here to watch the video).

The scenes with HD people moving uncontrollably starkly reminded me of my mother – and once again of my own terrible burden as a gene carrier.

Our biggest dream: an effective treatment

After we watched Marianna learn from a geneticist that she carries the HD gene, I answered students’ questions.

One asked: “Do days ever go by when you totally forget about your diagnosis, or is it always in the back of your mind?”

“It’s almost always in the back of my mind,” I responded.

However, I added: “I haven’t blogged since May. This is one of the longest periods I’ve gone without blogging.”

I explained that my Brazil book had priority over the summer.

“I’ve been able to put Huntington’s disease aside for the first time in many years,” I said. “It’s really nice to wake up some days and think about Brazil instead of Huntington’s disease.”

After leaving Dr. Rivard’s class, I remembered that the battle for treatments continues. It’s a battle that we need to win.

Like others affected by HD, I don’t want to become a financial and caregiving burden for my family. And like others, I want to experience the joys of family milestones, such as seeing my daughter graduate from college and start adult life without the worry of an incapacitated father.

An effective treatment will make that possible. Right now, that is our biggest dream.