Hope, cutting-edge science, and poignant moments at the World Congress on Huntington’s Disease

The first such HD meeting held in a developing nation, last month’s World Congress on Huntington’s Disease (WCHD) not only highlighted the need for better understanding of the disease in Latin America. It also revealed the growing global importance of the the quest for both better care everywhere and the development of treatments.

Featuring activities for both researchers and families, the sixth WCHD featured some 20 panels, a poster session, a satellite symposium, joint meetings of the International Huntington Association (IHA) and the Associação Brasil Huntington (ABH), entertaining evening wrap-ups by HDBuzz.net editors Dr. Jeff Carroll and Dr. Ed Wild, and a moving presentation by the France-based HD performance group Dingdingdong.

Like most HD conferences, the WCHD stressed advances in the search for treatments. The four-hour-long closing session included an update on clinical trials, a talk on deep brain stimulation and HD, a presentation on cutting-edge RNA-interference-based (RNAi) therapies, and an overview of the efforts to reduce or block the deleterious effects of the faulty protein huntingtin in the brain.

“There is a lot of hope,” said Dr. Doug Macdonald, the director of drug discovery and development for CHDI Management, Inc., which directs the multi-million-dollar effort to defeat HD by the CHDI Foundation, Inc., in his presentation. “There is a rich pipeline of these therapeutics advancing into the clinic. We have direct delivery of huntingtin-lowering agents, the viral delivery of RNAi agents, and viral delivery of zinc finger protein agents.”

Dr. Macdonald provided a clinical-trial timeline for these potential drugs. The first is likely to be the huntingtin-lowering drug under development at Isis Pharmaceuticals, Inc., and Roche, scheduled to enter a Phase I trial by the end of 2014. Other projects may begin trials in the next few years, Dr. Macdonald added.

For a detailed explanation of these approaches and more on timelines, watch Dr. Macdonald’s talk in its entirety in the video below. See also a discussion of other types of trials and general coverage of the WCHD at www.HDBuzz.net.

You can view 32 more chronologically ordered conference-related videos by visiting my 2013 World Congress on Huntington’s Disease album on Vimeo.

Modulating Huntingtin Levels to Treat Huntington's Disease: A Talk by Dr. Doug Macdonald from Gene Veritas on Vimeo.

From exciting science to social consequences

The WCHD scientific presenters focused on a panoply of other HD themes, from exciting developments in basic science to current medical treatments of symptoms to the social consequences of HD.

Dr. Elena Cattaneo of Italy presented the latest research on the origins of the huntingtin gene.

“The normal gene is a gene that everyone has,” Dr. Cattaneo explained. “Everyone in the world has that gene. At some point, we started to think that, if we have that gene, it means that gene is important. So about ten years ago my group, but also other groups, started looking for the function of the normal gene. Of course, we know that in the disease the mutant gene causes the loss of the neurons. But in order to understand more about the mutant version, we wanted to understand what the normal version was doing.”

Scientists discovered that the normal gene is important for “keeping the neurons healthy and alive and working properly,” she said.

The huntingtin gene was “born” in an ameba species 800 million years ago, she continued. “This is the first pluricellular organ, and the huntingtin gene is there. Pluricellular means that cells talk to each other to form an organism…. I started thinking of huntingtin as a gene with a social function, because it brings cells together. So let’s assume that huntingtin is such a gene. Huntingtin is a good gene. It is not a bad gene.”

You can watch Dr. Cattaneo’s fascinating presentation in the video below.

The Role of the Huntingtin Gene in Huntington's Disease: A Presentation by Dr. Elena Cattaneo from Gene Veritas on Vimeo.

Other notable presentations included Portuguese Dr. Joaquim Ferreira’s detailed review of the various ways in which doctors treat patients and Dr. Anita Goh’s discussion of genetic discrimination and HD.

The Latin American perspective

The WCHD brought a key South American perspective on HD.

“For one thing, the participation of a number of Latin American neurologists, geneticists, and family members offered some new views of Huntington's disease in countries such as Brazil, Peru, Argentina, and Colombia – countries we often do not hear about at international HD meetings,” Dr. Alice Wexler, a historian of HD science, observed in an e-mail after the congress. “Because the extent of Huntington's in these countries is not well known, many of these researchers presented epidemiological and demographic information that was new to most HD researchers, along with clinical and genetic data.”

Dr. Robert Weiser of Venezuela provided a view of HD in Maracaibo, Venezuela, the world’s largest known concentration of HD patients, while Dr. Carlos Cosentino of Peru and Dr. Laura Jardim of Brazil presented their unique research on other aspects of HD in the region.

The WCHD highlighted a stark contrast between the First World, where many HD patients can consult with physicians in modern clinics, and Latin America, where large pockets of HD-affected individuals get no medical attention and lack even such basics as clean drinking water.

Several participants noted that such conditions must improve dramatically for these families to take part in the studies and clinical trials crucial for finding treatments, including Enroll-HD, discussed below.

Rodrigo Osorio of Chile and Alice Wexler’s sister Dr. Nancy Wexler of the U.S. gave moving testimony regarding some of the efforts in the region to improve the conditions for patients, while Dr. Ignacio Muñoz-Sanjuan of CHDI advocated for a recently launched charitable, medical, and care initiative serving Latin America called Factor H: Hope, Huntington’s, Humanity. In their interview with me in Spanish, activists Aleska González and Vivian Puchi elaborated on the major challenges facing the HD community in their native Venezuela.

You can watch Muñoz-Sanjuan describe Factor H in the video below.


Factor H: Hope, Huntington's, Humanity from Gene Veritas on Vimeo.

Riveting stories

The WCHD also gave voice to the riveting stories of HD patients, tested and untested at-risk individuals, caregivers, and family members.

I participated in a plenary session titled “Coping.” The session began with a troubling presentation by Dutch Ph.D. student Marlous Hubers on the topic of “suicidality in Huntington’s disease.”

“In general, suicide occurs two to eight times more often in Huntington’s disease than in the general population,” Hubers stated. “In general, it’s said that 5.7 percent of all deaths in HD are due to suicide, which makes it the third or fourth cause of death in HD…. Screening for suicidal ideation is most important in patients with a depressed mood, as all studies found it as an important predictor.”

Shaken by Hubers’ incisive data, I started my own presentation on coping, which followed hers, by observing that “Marlous’s extremely important research really brings home some issues for me. It brings up lots of memories of how I’ve been trying to cope with living gene-positive for Huntington’s disease. I think she hit the nail right on the head with respect to how gene carriers need help, and gene carriers are kind of on their own, not only with respect to suicide, but other aspects of the disease.”

Collecting myself, I proceeded with a detailed rundown of the many strategies I have adopted to avoid the onset of symptoms.

You can watch my presentation in its entirety in the video below.

Coping with the Threat of Huntington's Disease: Gene Veritas speaks at the World Congress on HD from Gene Veritas on Vimeo.

In one of the most poignant moments of the WCHD, Dr. Carroll and his wife Megan revealed how they conceived their HD-free twins, a boy and a girl, using PGD, preimplantation genetic diagnosis.

The topic was particularly striking for Latin Americans. Genetic testing and genetic counseling are still a rarity, and it’s unclear how much people know about PGD or have used it. In addition, abortion is illegal throughout most of the region, and, at least in the Brazilian case, legislation against genetic discrimination is lacking.

Watch the Carrolls discuss PGD and hear the audience discussion in the video below.

Preimplantation Embryo Selection: Avoiding the Transmission of Huntington's Disease from Gene Veritas on Vimeo.

From young people, with love

The WCHD also had a strong youth presence. I interviewed England-based Matty Ellison, the 25-year-old founder of the Huntington’s Disease Youth Organization, about his father’s fight against HD, his own experience of testing positive for the gene at the age of 19, and his international advocacy.

The most unusual and beautiful moment of the WCHD came with the performance of Dingdingdong, a group of young adult performers representing French HD families and reflecting many themes relevant to young people facing HD.

The group put on From Huntingtonland with Love, a three-part presentation in English involving a short play, a video, and a silent dance performance by chogeographer and dancer Anne Collod, in which she mimics the chorea, or involuntary, dance-like movements, suffered by most HD patients.

You can watch Collod in the video below.


A Portrait in Motion of D., a Man Suffering from Huntington's Disease from Gene Veritas on Vimeo.

A costly event

For me, one drawback of the WCHD was the high cost of the venue, the Sheraton Rio Hotel and Resort, a luxury-class facility on the beach of Leblon, one of the world’s most expensive neighborhoods. My room cost nearly $400 per night, the most expensive room I have ever paid for, and out of reach for vast numbers of Latin American families. (And I couldn’t even share that expensive room with my wife, since she was back home with our daughter.)

Along with several family advocates and others, I noted how the exclusive facility, as well as the scheduling of the event the same week as the Rock in Rio music festival, had made it extremely difficult for low and even middle-income families – and perhaps also local research students – to take part.

As an experienced Brazil hand, I thought the organizers might have chosen less expensive, more accessible facilities. In my opinion, holding the meeting in less-glamorous but more convenient São Paulo – where ABH headquarters are located – would have been a good option.

Dozens of Brazilians attended the WCHD, but only a handful of people came from other countries, even from the aforementioned world leader in HD patients, Venezuela.

Nevertheless, as I wrote in my previous article, overall I thought the WCHD ran very smoothly, and families and IHA made important new connections.

A boost to Enroll-HD

Following the WCHD, CHDI ran a seminar to train medical professionals from Argentina, Brazil, Colombia, and Venezuela how to evaluate HD patients and collect medical information on them for Enroll-HD, the recently inaugurated global HD observational study and database.

Enroll-HD aims to improve tools to assess the disease, identify and characterize biomarkers (signs of the disease) necessary for measuring the effectiveness of treatments, recruit participants for other studies and trials, and improve clinical care everywhere.

Featuring Enroll-HD on one of its panels, the WCHD in Rio provided an important moment for publicizing the program and attracting participants.

(I will report on Enroll-HD at the WCHD in a future article.)

Continuing to foster international connections – and greater family participation in future conferences at all levels – will increase the chances of success of Enroll-HD and ultimately the defeat of HD.

Globalizing the fight against Huntington's

The participation of HD families in the search for treatments and a cure for Huntington’s disease is going global.

Starting in July 2011, registries of HD patients, at-risk individuals, and family members from different parts of the world will be combined into a single database.

Called “Enroll-HD,” this new effort aims to make it easier for scientists to understand HD, identify potential participants in crucial clinical trials, and therefore speed the process of finding therapies and a cure.

The Enroll-HD sponsor, the CHDI Foundation, Inc., released information on the new program on November 19. Backed by an anonymous donor who has contributed tens of millions of dollars, CHDI is informally known as the “cure Huntington’s disease initiative.” CHDI collaborates with hundreds of scientists from around the world.

Combining databases

Enroll-HD will combine the existing REGISTRY and COHORT databases.

REGISTRY, a Europe-wide study, is run by the Euro-HD Network. Administered by the Huntington’s Study Group, COHORT stands for “Cooperative Huntington’s Observational Research Trial.” It operates in North America and Australia.

Both databases collect information about the genetic status, lifestyle, medical history, and disease progression of patients and gene-positive individuals.

Enroll-HD also will include participants from the newly founded Latin American network of HD-affected families, physicians, and researchers, the Red Latinoamericana de Huntington. Enroll-HD also will obtain information from countries such as Singapore, South Africa, and South Korea.

“It’s a natural progression to combine the successful HD observational clinical studies into one worldwide effort that will harness the power of greater numbers of research participants,” said Dr. G. Bernhard Landwehrmeyer, a professor at the University of Ulm, Germany, the chair of Euro-HD, and the principal researcher for Enroll-HD.

People already participating in REGISTRY and COHORT will continue to consult with the same physicians at regular appointment times.

To learn more about Enroll-HD, please click here.

Latin America’s contribution

One of the most striking aspects of Enroll-HD is the inclusion of Latin America, our neighbors to the south.

Venezuela in particular has played an important part in Huntington’s research. Dr. Nancy Wexler of the Hereditary Disease Foundation spent two decades researching the world’s largest extended HD family, located in the Lake Maracaibo region. Dr. Wexler developed the pedigree (traced the genetic history) of more than 18,000 individuals and collected more than 4,000 blood samples. This pioneering work helped lead to the discovery of the HD gene in 1993. (To learn more, see her sister Alice Wexler’s book Mapping Fate.)

About 580 million people live in Latin America – nearly twice the population of the United States. In rough terms, this means that some 60,000 people in the region could have Huntington’s. Studying these individuals and their families will provide a greater understanding of HD’s devastating effects and its terrible social impact.

It could also benefit HD families victimized by ignorance and poverty. Although conditions have improved for many in recent decades, most Latin Americans are still poor by our standards, and many have little or no access to quality education. In his visits to Colombia, HD activist Phil Hardt observed HD patients living in deplorable conditions – some even in old jail cells.

The Red Latinoamericana de Huntington can help raise awareness about HD throughout the region and perhaps stimulate government support for care programs and research. It also will tie the HD families and researchers from Latin America’s countries more tightly together – and also into the global network of researchers and care and advocacy programs.

More and faster research

Above all, by including Latin America’s HD families on the rolls of potential participants in clinical trials, Enroll-HD will vastly expand the possibilities of testing more drug candidates and carrying out faster research.

The Huntington’s research community faces an extremely difficult problem. As an orphan disease, there may not be enough subjects for trials as potential drugs become ready for testing. This problem is compounded by the fact that researchers have now identified more than 700 potential drug targets. Most trials minimally require dozens of participants, and others utilize hundreds and sometimes thousands of subjects.

In Europe, HD-affected and gene-positive individuals volunteer in sufficient numbers. Ironically, Americans do not. Despite this country’s power and overall wealth, denial, fear, and ignorance still dominate many families affected by HD. This lack of American participation makes Enroll-HD even more important.

Guinea pigs?

Some might be concerned that Enroll-HD could become an attempt by scientists from rich countries to use people from poor nations as guinea pigs – that is, subjects tested unethically.

Fear of this kind of unequal relationship definitely exists in Latin America. I have frequently heard such concerns during my own historical research and travel in the region over the past quarter century.

But it’s unlikely that Enroll-HD will proceed with any kind of negative or arrogant attitude. All Enroll-HD participants will be protected by the strict protocols that govern research on human subjects.

The official Enroll-HD press release reassured current and future participants that “your samples will continue to be safely stored in the same biorepositories where they are now kept and all information about you will be securely stored in accordance with applicable local laws and regulations regarding the protection of your privacy.”

In addition, CHDI, European researchers, and Latin American representatives held on-the-ground preparatory meetings in Rio de Janeiro, Brazil, in February and Buenos Aires, Argentina, in June. The Rio meeting included representatives from Brazil, Argentina, Chile, Cuba, and Venezuela. Colombian and Peruvian representatives likely will participate in the future.

Reactions to the project

“I went to Rio because I wanted to extend a message of Hope to those in Latin America,” Dr. Ignacio Muñoz-Sanjuan, an HD researcher and the CHDI representative at the Rio meeting, wrote in his HD science blog. “This is not an American or European enterprise. It's a global fight to find a cure, which should be made available to all, rich or poor, in N[ew] Y[ork] or Maracaibo. But I also went there because we need more people to work with us. I need every affected person to participate: by donating blood, by speaking out, by enrolling in observational studies, in clinical studies. We simply cannot do it without the patients and the people at risk.”

Taíse Cadore, the vice-president of the Associação Brasileira de Huntington (Brazilian Huntington’s Association), wrote in a report that her organization “left the meeting with a great sense of optimism. We recognize the importance of our role in the development of this project and hope to be counting on the participation of our families.”

“The Red Latinoamericana de Huntington is very excited to become a part of the global Enroll-HD initiative and collaborate in this way with the international HD research community to better understand and treat Huntington’s disease,” Rodrigo Osorio, a native of Chile and the president of the Latin American organization, said of the official launching of Enroll-HD.

Bernhard Landwehrmeyer (right) converses with Rodrigo Osorio at the CHDI research symposium in Palm Springs, CA, in February (photo by Gene Veritas).


Inspiring global involvement

As a Latin America scholar and an HD-positive person who lost a mother to Huntington’s disease in 2006, I felt especially heartened with Enroll-HD’s recognition of the global character of disease and the need to include people of all continents in the search for treatments and in the resultant benefits.

I was especially happy to see my friends at the Brazilian Huntington’s Association receive the attention they deserve as potential contributors to the fight against HD. Without wealthy benefactors or government support, they have fought long and hard to build their organization solely on the grit and donations of HD-affected families.

Their efforts should inspire HD families in America to come out of the woodwork and redouble our efforts to strengthen our own community, educate the public about HD, and prepare for participation in clinical trials. (I will write more on the Brazilian association in my next entry.)

Ultimately, Enroll-HD can help build global awareness about the need to cure Huntington’s and other neurological disorders. We all share a common condition and, as we now understand, only together will we defeat HD and these other maladies.