Wednesday, August 28, 2019

What if we could turn off the cause of Huntington’s disease?


What if scientists could simply switch off a mutated gene causing a debilitating neurodegenerative disorder like Huntington’s disease?

Known as gene (or genome) editing, that approach is a current hot research topic, generating hope for sufferers of genetic diseases like HD.

Gene editing will be the focus of a symposium on September 4 sponsored by life science start-up incubator Johnson & Johnson Innovation, JLABS (hereafter simplified as JLABS) and the Janssen Pharmaceutical Companies, the drug-discovery arm of Johnson & Johnson, in San Diego, CA.

At the sponsors’ invitation, I will give a presentation, based on my two decades as an HD advocate, on the health and social challenges faced by HD-affected individuals and their families. The two firms have also invited seven leading scientists and biotech executives to speak at the symposium, titled “Science Alliance: Silencing Neurodegenerative Diseases and Sensory Disorders with Gene Editing.”

HD community members can watch the live webcast of the event for free by registering at the event website and entering the discount code “HDCOMMUNITY” at check out. Attendance in person is $35 for the general public and $20 for students and academics, at the JLABS facility at 3210 Merryfield Row, San Diego.

Recent milestones in gene therapy “have ignited interest” in the field and “especially its application to neurological disorders,” the website states. Gene editing has opened the door to innovation in the treatment of diseases like HD, spinal muscular atrophy, and ALS, according to the organizers.

The website points out that, as the technology progresses, key questions are emerging, such as how to effectively deliver gene editing drugs to the brain.

Owned by Johnson & Johnson, JLABS provides labs, offices, marketing, education, and events for early-stage life-science companies unaffiliated with Johnson & Johnson. In San Diego, one of the world’s leading biotech hubs, it offers services to 60 companies; globally, JLABS serves 580 companies.

The pharmaceutical arm of Johnson & Johnson, the Belgium-based Janssen was acquired in 1961.

Advances in gene editing

Gene editing is different from gene silencing, the technique used in the Phase 3 Roche clinical trial currently in progress in the U.S. and a projected 17 other countries (click here to read more). Roche’s RG6042 is an antisense oligonucleotide, an artificial strand of DNA designed block the production of the huntingtin protein in brain cells.

With gene editing, scientists make changes in the actual DNA – a revolution in biomedical research.

The gene-editing technology currently getting the most attention – one already used in the search for HD treatments – is known as CRISPR. Scientists first observed CRISPR occurring naturally in bacteria in the 1990s. In 2002, scientists discovered additional DNA instructions called “Cas.” The combination CRISPR/Cas actually comprises the bacterial immune system. (Click here to read more.)

“There’s no equivalent of word processing software to edit genes,” then Ph.D. candidate Leora Fox (now a Ph.D.) wrote in HDBuzz in 2017. “To fix genes on a microscopic scale, one cell at a time, the faulty code has to be located and physically cut – and that’s what CRISPR/Cas does.”

To alter a gene, scientists need to insert CRISPR/Cas into the cells.



(Image credit: Ernesto del Aguila III, National Human Genome Research Institute, and Wikimedia Commons)

In a disease like HD, the goal is to use this mechanism to cut directly (that is, shorten) the defective, elongated gene. Researchers are also looking at other ways to deploy gene editing.

In recent years, HD research groups have used this technology to edit the HD gene in the brains of genetically modified “HD mice”. One group developed a technique that led to beneficial effects in mice, including the recovery of older mice that had already developed symptoms. (Click here to read more.)

Chinese researchers have used gene editing in human embryos to fix the mutation behind the blood disease beta-thalassemia, which reduces the amount of red blood cells. However, the embryos were not implanted. 

Gene editing is still far from use in human clinical trials. Among the challenges, scientists need to find ways to effectively deliver such a treatment to the brain and avoid inadvertent editing of other genes. (Click here to read more.)

(Late last year a researcher in China claimed to have used CRISPR to alter the genomes of twin baby girls through in vitro fertilization to enable them to resist potential infection from HIV. The news of this development sparked renewed controversy over the use of biotechnology to intervene in human life.)

The symposium participants

To explore gene editing in neurodegenerative and sensory disorders (difficulties with the five senses), JLABS and Janssen have invited seven researchers and executives to the September 4 symposium, including at least two with experience with CRISPR. They include:

Leah Aluisio, Associate Director, Janssen Research and Development;

Alexis C. Komor, Ph.D., Assistant Professor, Department of Chemistry and Biochemistry, UCSD; 

Young Jik Kwon, Ph.D., Professor, Department of Pharmaceutical Sciences, University of California, Irvine, and co-founder, Responsive Polymers Therapeutics, Inc., and Jupiter Therapeutics, Inc.;

Sanjay Mistry, Ph.D., Head of JLABS @ San Diego, Johnson & Johnson Innovation, JLABS;

Gerry Rodrigues, Associate Vice President, Allergan;

Arthur Suckow, Ph.D., CEO, DTx Pharma; and

Gene Yeo, Ph.D., MBA, Professor, University of California, San Diego, and co-founder, Locana and Eclipse Bioinnovations.

Their bios are available on the event website.

Imagining a cure?

As a speaker, I hope to portray HD’s devastating impact and the urgent need for effective treatment.

In the HD world, scientists avoid the word “cure.” HD is so complex that many have said a cocktail of drugs will be needed to target the multiple problems in the brain and elsewhere in the body.

For the first time, actually switching off or completely removing a mutation might enable us to imagine the way to a cure.



Gene Veritas (aka Kenneth P. Serbin) (photo by Yi Sun, Ph.D.)

Monday, August 12, 2019

Factor-H partners with Latin American organizations to aid destitute Huntington’s disease families, seeks to expand support


Looking to aid some of the destitute Latin American families whose critical participation in research led to the discovery of the Huntington’s disease gene, the humanitarian organization Factor-H is poised to seek new funding sources to expand its support in the region.

Founded in 2012 and based in Los Angeles, Factor-H has spent several hundred thousand dollars on projects for and direct aid to poor HD families. 

On July 27 in Los Angeles, Factor-H president and co-founder Ignacio Muñoz-Sanjuan, Ph.D., took part in the world premiere of the short documentary film Dancing at the Vatican, which features South American HD-afflicted families’ remarkable 2017 encounter with Pope Francis at the Vatican.

At the historic Rome event – for which Factor-H played the key role of selecting and arranging logistics for South American families – Francis declared to a global audience of 1,500 HD family members, scientists, and supporters that HD should be “hidden no more.”

Known as #HDdennomore, it was the first time any pope or world leader met with HD-affected individuals.

“It was probably the most significant milestone of what we’ve done,” Dr. Muñoz said in an interview with me on July 29 at the Los Angeles office of CHDI Foundation, the nonprofit virtual biotech focused exclusively on developing HD treatments and where he is vice president for translational biology. “I think it did give us, as an organization, visibility and some credibility that we can do things that are of a certain magnitude.”

The Dancing at the Vatican premiere launched a new fundraising effort by Factor-H. Dr. Muñoz and the film’s producers, including #HDdennomore organizer and Dancing at the Vatican producer and narrator Charles Sabine (like me an HD gene carrier), are seeking to distribute the film widely. In about a year, it will become available online for free. (Click here for my preview.)


Dr. Muñoz holding hand of HD man in South America (Factor-H photo)

‘A very compelling story’

“It’s a very compelling story, very moving, and very positive in its approach,” Dr. Muñoz observed about the film. Viewing it can help people “fully grasp” the extreme poverty and challenges faced by many Latin American HD families.

Dr. Muñoz said Factor-H will use the film to raise awareness about those families’ needs and reach out to donors. “H,” according to the organization, means “hope, humanity, Huntington’s.”

According to Dr. Muñoz, the film captures well “the intersection of disease with poverty and social justice, which I think the HD experience really highlights very well, and I think the documentary does a very good job of highlighting that.”


Dr. Muñoz answering a question at the Dancing at the Vatican premiere (photo by Eddie Sakaki)

Hiring an executive director

Also, Factor-H has received a grant from the Griffin Foundation to hire an executive director, Bianca Moura, to assist with fundraising and media exposure, and to ease the burden on the all-volunteer board by handling day-to-day operations.

The Brazilian-American Moura, who holds a B.A. in development studies from the University of California, Los Angeles, has worked the past 25 years in business leadership positions and as a consultant. She served as board president and executive director for the Miami Beach-based cultural nonprofit Rhythm Foundation.

She will join the Los Angeles-based Factor-H on September 1.


Gene Veritas (aka Kenneth P. Serbin) with Bianca Moura at Dancing at the Vatican premiere (personal photo)

Challenges in Latin America

In recent decades, Latin American countries have generally experienced stronger democracy and rising living standards. However, in the past few years Venezuela has slipped into a deep political and social crisis, causing four million people to flee the country, a record for Latin America.

Also, Latin American societies remain deeply unequal. In many parts of the region, especially outside the developed neighborhoods of the large cities, the social, medical, and governmental infrastructure is poor and sometimes even non-existent.

There is also little knowledge or understanding of HD.

In 2006, as newsletter editor for the San Diego Chapter of the Huntington’s Disease Society of America  (HDSA), I published an article by 2001 HDSA Person of the Year Phil Hardt documenting the private “jails” in which HD-affected people were locked up by ill-informed relatives in the small town of Juan de Acosta in rural Colombia. The town, about 24 miles west of the city of Baranquilla, has the world’s second largest cluster of HD-affected individuals. Hardt works with Factor-H in the implementation of a children’s project in Colombia (see below).

As Dr. Muñoz observed in our July 29 interview, today some HD families lack fresh water and sewage systems. They live in shacks with little or no furniture. Because physicians specializing in neurology and movement disorders like HD also tend to concentrate in the cities, many of the families living in rural areas or in small towns do not have access to specialized care, he added.

In such a setting, families with Huntington’s disease face enormous challenges.

Giving back to poor communities that helped

Visiting such places in Colombia, Venezuela, and elsewhere was a “life-changing experience” for Dr. Muñoz, he told the audience after the screening of Dancing at the Vatican. He saw people from HD families searching for food in the streets, many abandoned children, and young children caring for their HD-stricken parents.

“There is really little chance of a normal childhood,” Dr. Muñoz pointed out. “Many children living with Huntington’s disease or from HD families are discriminated against. Their lives are full of fear and trauma, due to Huntington’s and social exclusion.”

Dr. Muñoz met patients who went years without any kind of medical or social assistance. Others he met eventually committed suicide.

The Lake Maracaibo region of Venezuela, less than 300 miles east of Baranquilla and also on South America’s north coast, has the world’s largest concentration of HD-affected individuals – described by Sabine as HD’s “ground zero.” There pioneering scientist and HD-family member Nancy Wexler’s research, which included collecting blood samples from the people, helped lead to the discovery of the huntingtin gene in 1993. Some villages in the region have as many as 20 percent of their residents living at risk for the disease, Dr. Muñoz observed. 

(The Casa Hogar, a nursing home and clinic in the Maracaibo area for persons living with HD, opened in 1999 thanks to the efforts of Dr. Wexler and a Venezuelan physician, Margot DeYoung.  At present there are no patients living in the Casa Hogar, although outpatient counseling may be available on a limited basis.)

Factor-H wants to “give back” to those and other impoverished HD communities, Dr. Muñoz concluded, issuing an appeal for support.

“At the end of the day, it’s a civil rights issue,” he added in our July 29 interview. “People should have access to fresh water, to decent care, to a bed. Nobody with HD should be dying or in shame or been abandoned by the families, let alone by their governments.”

Supporting basic needs, education, and medical care

As a result, Factor-H has spent several hundred thousand dollars assisting HD families, so far mainly in Venezuela and Colombia, Dr. Muñoz told me in an August 7 e-mail.

Factor-H has focused on helping meet basic needs, arranging for potable water, clothing, medications, specialized medical care, burial services, and legal assistance. It supports the education of children and also of caregivers and patients, including audiovisual materials for the illiterate.

Factor-H also assists with establishing sustainable community development projects to reduce the huge economic burden HD typically causes for families. In the future, it hopes to help establish community centers.

Building a sense of pride for young at-risk people

With its emphasis on children and teens, in 2015 Factor-H established Project Abrazos (“hugs” in Spanish). The program helps children remain in school. The program currently supports 42 Colombian and 100 Venezuelan children ages 5 to 15, all at risk for HD. Factor-H also helps promote sports and recreational activities.

In Colombia, the children also get to vacation during summer and at Christmas “so they have a proper childhood,” Dr. Muñoz said at the premiere. “It’s wonderful to see them doing so much better than when we met them.”

In July 2018, Factor-H co-sponsored the first Latin American Huntington’s Disease Conference in Barranquilla. The conference included activities for Juan de Acosta residents. It was structured to address HD not just as a medical or educational challenge, but also as a social problem, Dr. Muñoz explained.

In tandem with the conference, the Huntington’s Disease Youth Organization (HDYO) organized a meeting for young people from six Latin American countries. For many, it was their first experience of global solidarity and friendship in the HD cause. Factor-H hopes to hold the conference every two years.

Dr. Muñoz described how teens and young people experience the shame, stigma, and social isolation often associated with HD. 

“In many cases, they felt nobody was going to love them and marry them, because they came from an HD family,” he explained in our July 29 interview. “In many instances, I felt that people had no hope that they were going to lead a productive life because they were going to die from Huntington’s, so therefore why go to university and so forth.” 

To overcome this outlook, Factor-H seeks to build a sense of pride, confidence, and growing sense of community in young people, which will help create a new generation of leaders for the Latin American HD community, Dr. Muñoz pointed out. 

Anyervi’s transformation

At the premiere, Dr. Muñoz offered the example of how the life of Anyervi Gotera, 16, of the Maracaibo region, has been transformed by Factor-H and #HDdennomore – despite having learned the day after meeting Pope Francis that he has juvenile HD, in which symptoms appear as early as the toddler years.

Before the pope's arrival in the Vatican auditorium, Anyervi was honored on stage and given a soccer ball and jersey autographed by Brazilian star Neymar.

“When I first met Anyervi a couple years before then, he wouldn’t look at me in the eye,” Dr. Muñoz told the audience. “He was embarrassed, almost ashamed. He didn’t get out of his home in San Luís. He had no friends. He had been pulled out of school because he was being bullied. He usually played alone with a small ball in the back of the house.

“However, today I can say for sure that Anyervi’s story is one of very profound change. He’s adored by his community. He has many friends – his mother would say too many. He’s a very confident teenager, in spite of the disease and because of his speech impediments. In some ways, he has become a hero in his own town.”

Sadly, juvenile HD sufferers like Anyervi rarely live beyond their 20s and often die in their teens. Anyervi’s HD-stricken father, who passed on the gene to his son, died earlier this year. He was in his 40s. 


Juvenile HD-affected Anyervi with soccer ball after #HDdennomore, May 2017 (photo by Gene Veritas)

Establishing trust

In order to understand HD families’ needs, Factor-H also assists with the socioeconomic mapping of HD communities in Latin America. However, Dr. Muñoz stressed that it does not conduct or finance any scientific or clinical research.

Instead, Factor-H aims to form a “trusting relationship” with HD families, he explained in our July 29 interview.

“A lot of the initial experience of impoverished communities with Huntington’s disease with medical or scientific professionals has always been around their participation in a scientific or clinical study,” he said. “So there was a bit of a misperception that I was there as a scientist to study them, which wasn’t the case.

“Our strategy from the beginning was to get to know them as individuals and as a community, understand their history, understand their needs, and also identify local organizations or community leaders who we could work with to channel help and be able to implement projects to their benefit.”

Thus, Factor-H partners with local HD associations, foundations and nonprofit organizations, universities and medical schools, aiming to maintain full transparency, for example by holding public meetings, Dr. Muñoz said.

(Though #HDdennomore indicates progress, the Catholic Church has offered limited and sporadic assistance so far, but Dr. Muñoz said he believes more help may be forthcoming. Recently, Factor-H received a small grant from the Italian branch of Caritas, the Catholic international aid agency.)

Local HD groups and families need “to be involved at every step of the way,” Dr. Muñoz said. “We don’t want to be an organization that comes in from outside to tell people what they need to do.” 

Factor-H and its partners seek to raise awareness regarding HD among Latin American governmental and nongovernmental organizations, then stress the need to assist affected families with specialized support, Dr. Muñoz explained.

Expanding across Latin America – and beyond?

According to Dr. Muñoz, in addition to Venezuela and Colombia, Factor-H has also pursued projects in Chile and Peru. It brought an Argentine family to #HDdennomore and has also done fundraising in that country, and it involved Brazilians in the 2018 HD conference in Colombia. Factor-H has also received inquiries from Ecuador and Costa Rica.

Factor-H would like to extend to all of Latin America, Dr. Muñoz said.

In Brazil alone, Latin America’s largest country (and the world’s fifth largest) with 210 million people, an estimated 20,000 people have HD. (Dr. Muñoz visited a poor, isolated HD community there in 2013.) Mexico, the world’s eleventh largest country, also doesn't yet have Factor-H programs.

Indeed, HD organizations, even in rich countries, have been able to afford family and community assistance at best only on a small scale.

WeHaveAFace offers a small family assistance program currently operating in Canada, but the U.S. branch is currently out of funding, Kevin Jess, the WeHaveAFace Canada vice president, told me in an August 9 Facebook interview.

HDSA and its National Youth Alliance provide scholarships to its annual conventions, but have no family assistance program. However, as HDSA CEO Louise Vetter explained in a phone interview August 12, the organization keeps the HD community informed of other assistance programs such as the Thomas Cellini Huntington’s Foundation and Healthwell Foundation’s fund to help with HD medications.

HDSA assisted Factor-H with #HDdennomore, the shooting of the footage for Dancing at the Vatican, and the Los Angeles premiere, Vetter said. It has also helped Factor-H with project management.

“It’s part of our responsibility to the global community that we make sure that all families affected with HD have access to the best information and best resources,” she said, adding that HDSA is also “very active in international partnerships and collaborations” with HDYO, the International Huntington Association, the European Huntington Association, and HD Cope.

Noting that the Factor-H is applicable anywhere, Dr. Muñoz believes that it could someday set up elsewhere in the developing world. 

“Any family with Huntington’s that’s living in difficult situations socially or financially, if we can help, we should be able to help,” he said.

For any of this to happen, he added, Factor-H needs broader support among both individuals and institutions.

Watch my July 29 interview with Dr. Muñoz in the video below. Just below that video, watch our additional interview in Spanish about Dr. Muñoz’s scientific background and research, Factor-H, and the progress towards HD treatments.


Monday, July 22, 2019

‘Dancing at the Vatican,’ about Huntington’s families’ remarkable papal audience, premieres July 27


Dancing at the Vatican, a short documentary featuring South American Huntington’s disease-afflicted families’ remarkable 2017 encounter with Pope Francis at the Vatican, will premiere in Los Angeles on July 27.

The 38-minute film captures key moments of those impoverished, disease-stricken families’ extraordinary journey – some had never ventured beyond their home towns; some even lacked birth certificates – to their meeting with the Spanish-speaking Francis, the first Latin American pontiff in the Catholic Church’s 2000-year history.

The documentary is narrated by Emmy-award-winning former NBC-TV foreign correspondent Charles Sabine – like me, an asymptomatic HD gene carrier – and one of the lead organizers of “HDdennomore: Pope Francis’ Special Audience with the Huntington’s Disease Community in Solidarity with South America.”

“In the course of 26 years as a television journalist, living through more than a dozen wars, five revolutions, and four earthquakes, I witnessed many examples of people achieving the seemingly impossible,” Sabine says in introducing the film, which I previewed online July 21. “None, though, was as inspirational as the tale I’m about to tell.”

The film portrays the struggles of HD family members such as Dilia Oviedo Guillén, a Colombian woman who lost her husband and five children to the disease.

Dilia provides 24-hour care to four more adult children. “I have to wash, cook, and feed them,” she says in the film. “You have to do all that for them. They can’t use their hands to eat. They’re my children, so I feel as if I have their illness.”

Dilia has no professional caregivers or physical therapists to assist her. The family is so poor that she had to bury three of her children in a single grave.

In showing the struggles of Dilia’s family and others, Dancing at the Vatican captures the underside of the HD world. Such families deal with one of the humanity’s most devastating diseases and severe poverty, lack of opportunities, poor or non-existent infrastructure, neglect by the government and society, and stigma and discrimination.

However, as Sabine wrote me in an e-mail today, he and the filmmakers also sought to include "happy tales set against the dark canvass of our disease."

“‘Pope meets sick people’ was not a headline the world’s media would care about,” Sabine wrote.  “‘Pope meets sick people with an extraordinary visual backstory,’ was.”

The film follows Dilia’s family and four others as they tour Rome; are received in the Italian Senate by its president and world-renowned HD researcher, Senator for Life, and #HDdennomore organizer Elena Cattaneo; and anticipate the big moment with Pope Francis.


From the Dancing at the Vatican website. Dilia Oviedo Guillén is pictured in the center.

Proceeds benefit Factor-H

The premiere will take place at the SilverScreen Theater, Pacific Design Center, 8687 Melrose Avenue, West Hollywood, CA. Doors open at 5:30 p.m., with a screening of the film at 6 p.m., followed by a Q&A and refreshments. Actress and singer Kate Miner, also from an HD family and a participant in the papal audience, will emcee the evening. Self-parking on the street or at the Center ($10) is available.

Directed at the HD community and the general public, the event and the film seek to raise awareness about HD and, as key HD researcher Ignacio Muñoz-Sanjuan, Ph.D., wrote in an e-mail, “the desperate situation of many HD families in Latin America.”

Sponsored by HD-focused drug developers Ionis Pharmaceuticals, Inc., Genentech, and Wave Life Sciences, admission to the premiere is free. (Click here to register.)

Sabine recorded a one-minute video personally inviting the HD community to participate in this “extraordinary celebration.”

Those who wish can contribute to Factor-H, a nonprofit that seeks to improve the quality of life of poor HD families in Latin America. Founded by Spanish-born neuroscientist Dr. Muñoz-Sanjuan and the Argentine physician Claudia Perandones, both featured in Dancing at the Vatican, Factor-H currently supports families in Chile, Colombia, Peru, and Venezuela. Venezuela’s Lake Maracaibo region has one of the world’s densest clusters of HD families, with many residents donating blood in the scientific quest for the HD gene.

Instrumental in #HDdennomore, Drs. Muñoz-Sanjuan and Perandones saw the papal audience as a way to further Factor-H’s work. The organization seeks to expand assistance to other nations.

Sabine and the filmmakers chose Los Angeles for the world premiere because Southern California is a “‘perfect storm’of the HD community – a collaboration of the best of researchers, advocates, clinicians and support groups,” Sabine wrote. However, he also recalled the “truly international nature of the event and film,” noting that 28 countries were represented at #HDdennomore.

In fact, the film has planned premieres in Washington, D.C., London, Rome, Glasgow (Scotland), and South America. Later it will become available online.

Bringing joy and hope

My wife Regina, daughter Bianca, and Brazilian mother-in-law Lourdes took part in #HDdennomore (click here to read more). 

We watched Pope Francis declare that HD should be “hidden no more.”

“It is not simply a slogan, so much as a commitment that we all must foster,” the pope urged the audience of some 1,500 HD community members from around the world.

The film depicts how, after his speech, Francis greeted and hugged each member of the HD-afflicted South American families, sometimes caressing their heads as they spoke to him and cried.

Watching Dancing at the Vatican took me back to those poignant moments in the papal meeting hall. I teared up, as I did that day. 

As Sabine states in the film, #HDdennomore was “the biggest event in the history of Huntington’s disease.”

Dancing at the Vatican underscores the deep medical and social suffering of HD, which, in South America, is exacerbated by poverty and inequality.

However, as the film also shows, those HD families got a wonderful moment to celebrate, smile, and dance.

Thanks to the organizers of #HDdennomore, Factor-H, and Pope Francis, the terrible burden of HD perhaps feels a bit lighter for all affected families. We can all share in that joy – and the hope offered by Francis – by watching Dancing at the Vatican.

(For background on #HDdennomore and its impact, click here and here. A future article will explore Factor-H in depth.)

Wednesday, June 26, 2019

Roche restarts redesigned Phase 3 Huntington’s disease trial


Three months after announcing it would reduce dosing in its historic Phase 3 Huntington’s disease clinical trial – and pausing for a reset – pharma giant Roche announced on June 20 that it has reopened recruitment for the study, known as GENERATION HD1.

GENERATION HD1 aims to measure whether Roche’s gene-silencing drug, RG6042, will slow, halt, or perhaps even reverse HD symptoms. In late January, Roche announced that it had enrolled the first participant in the trial, which will include a total of 660 volunteers at more than 90 sites in at least 18 countries around the world.

In the original trial design, participants would undergo monthly spinal tap (lumbar puncture) procedures over 25 months. One third of participants would receive RG6042 each month and one third every other month. A third would get a placebo.

However, with new, promising data in hand from an open-label extension (OLE) of the Phase 1/2a trial, on March 21 Roche announced that it would decrease lumbar punctures to once every other month over the same period of time (click here to read more). In this revised design, one third of participants will receive RG6042 every other month and one third every four months. One third will receive a placebo every other month.

The change in dosing required Roche to stop the trial to obtain updated approval from regulatory agencies in the respective countries where the program is operating. Recruitment had to start from scratch, with all new volunteers. Roche completed the necessary details for resuming the trial in just a few months, as it had hoped.

“In March we announced our plan to amend the dosing frequency and study design, which will make study participation less demanding for patients, their families and HD centers,” Mai-Lise Nguyen, Roche’s HD patient partnership director, wrote to the HD community in a June 20 e-mail update on the trial. “Since then, our team has been working to implement study changes and obtain approvals from clinical trial review boards and authorities around the world. Today I am pleased to share that we have reopened the study for recruitment of new patients.”


Mai-Lise Nguyen (photo by Gene Veritas)

Initial authorizations received

With the lumbar punctures, GENERATION HD1 clinicians introduce RG6042 into the cerebrospinal fluid (CSF), which circulates along the spine and bathes the brain. The researchers hope that the drug will penetrate the brain sufficiently and, as a result, stop progression of HD. 

Lumbar punctures are routine and generally safe procedures, although they can sometimes cause side effects such as headaches and bleeding. In GENERATION HD1, the dosing will be a 20-minute outpatient procedure.

Roche changed the dosing based on new data taken from the OLE of the Phase 1/2a clinical trial of RG6042. Phase 1/2a was run by Ionis Pharmaceuticals, Inc., the original developer of the drug. Involving 46 volunteers in Canada, Germany, and the United Kingdom, that trial ended successfully in December 2017: the drug substantially lowered the amount of mutant huntingtin protein, the purported cause of the disease, in the patients’ CSF, which could be an indication of what’s happening in the brain – again, something to be studied in Phase 3.

All 46 participants took part in the 15-month OLE, which is run in support of the overall RG6042 research program. Nine months into the OLE, Roche had data indicating that it could reduce dosing in the larger Phase 3 study. Whereas 25 percent of the Phase 1/2a volunteers got a placebo, all 46 received the drug in the OLE.

“Initial clinical trial authorizations to start the amended GENERATION HD1 study have been received, and we expect to receive the remaining approvals soon,” Nguyen stated. “Recruitment timing will be different at each participating HD clinic/center, because the protocol amendment must be fully approved and in place at each study site before local recruitment may open. Our team is working to rapidly activate the updated study protocol at each site.”

An updated country list

Nguyen provided an updated list of countries currently hosting the GENERATION HD1 sites: Argentina, Australia, Austria, Canada, Chile, Denmark, France, Germany, Italy, Japan, The Netherlands, New Zealand, Poland, Russia, Spain, Switzerland, United Kingdom, and the United States.

Roche recommends that those interested in participating contact their local HD specialists. Individual site information will also be posted at ClinicalTrials.gov and ForPatients.Roche.com.

Individuals who had already started GENERATION HD1 before the announcement of the changes in dosing will be eligible to switch to GEN-EXTEND, an OLE study in which everybody receives RG6042 (no placebo).

Publication of the first data

The resumption of GENERATION HD1 comes in the wake of the first official publication of Phase 1/2a data. That article underscores the impressive results of the trial but also the need for careful study of RG6042 in Phase 3.

Co-authored by 22 scientists, including leaders of the Roche and Ionis HD teams, the article “Targeting Huntingtin Expression in Patients with Huntington’s Disease” appeared in the online edition of The New England Journal of Medicine (NEJM) on May 6 and in print on June 13.

The article confirmed that Phase 1/2a met its primary goal of demonstrating no serious adverse effects of RG6042.

The article also provided details demonstrating the extent to which RG6042 reduced the mutant protein in the CSF. However, it added that researchers still do not yet know whether that reduction in the CSF corresponds to a reduction in the human brain.

A ‘big leap forward,’ but with a critical need for Phase 3

The NEJM article also revealed that two tests showed results that could prove worrisome: temporary increases in the size of the ventricles (fluid-filled spaces) of the brain and in a biomarker (sign of disease) known as neurofilament light.

“Getting to the bottom of these potentially concerning lab tests requires a larger group of people, followed for a longer time,” commented HD researcher Jeff Carroll, Ph.D., in a May 7 HDBuzz.net article

In Huntington’s, the ventricles “appear to grow, as the [brain] tissue around them shrinks,” Dr. Carroll explained. This is “the opposite effect one would hope for if the drug was slowing brain shrinkage,” he added.

Regarding neurofilament light, Dr. Carroll observed that “this marker is released by sick and damaged brain cells called neurons, and researchers have previously demonstrated that it increases slowly and predictably in HD mutation carriers.”

The need to understand these test results is “exactly why Roche and Ionis are conducting a new, larger, study called the GENERATION-HD1 study,” Dr. Carroll continued.

Dr. Carroll concluded that “the now published results of the first study with a drug targeting the root cause of HD are a big leap forward for the community. They point towards refinements and cautions we should consider as we test the drug in larger groups of HD patients over a longer time.”

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

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