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Jeffrey Dome

Q&A with Dr. Jeffrey Dome on his new role as Continental President of SIOP-North America

Jeffrey Dome

In March 2021, Jeffrey Dome, M.D., Ph.D., senior vice president of the Center for Cancer and Blood Disorders at Children’s National Hospital, was elected as the International Society of Paediatric Oncology’s (SIOP) Continental President of North America.

In March 2021, Jeffrey Dome, M.D., Ph.D., senior vice president of the Center for Cancer and Blood Disorders at Children’s National Hospital, was elected as the International Society of Paediatric Oncology’s (SIOP) Continental President of North America.

On October 21-24, the society will hold its 53rd SIOP Annual Congress virtually. During the congress, Dr. Dome will begin his 3-year term as SIOP continental president of North America and will also chair and speak at an educational symposium on current approaches to the treatment of recurrent Wilms tumor.

Dr. Dome attended his very first SIOP meeting in 2005 and was captivated by how regional context influences pediatric cancer treatment. In 2017, he was chair of the local organizing committee for the 49th annual congress in Washington, D.C., and served on the SIOP Board of Directors.  After 15 years of involvement and attending many of the annual meetings, Dr. Dome shares what he looks forward to while serving as continental president of SIOP North America and the legacy he hopes to leave behind.

  1. What does it mean to you to be elected SIOP continental president of North America?

I’m very excited about this role. There are several important societies and organizations in North America that have made a mark on the field of pediatric oncology, but SIOP is unique in its sole focus on childhood cancer and global approach to improving outcomes, as encapsulated by its vision statement: No child should die of cancer: cure for more, care for all.

  1. What excites you most about this role?

In an eye-opening statistic, North America has only about 10% of the global burden of childhood cancer and less than 2% of worldwide childhood cancer deaths.  Although we relentlessly strive to improve childhood cancer outcomes in the United States, what we experience here is just the tip of the iceberg of the worldwide problem. SIOP seeks to make a difference on the international level by improving education, research and access to care for children with cancer around the world. And I’m excited to have a platform to lead North American ambassadors to do that.

Even though North America has a relatively small fraction of the overall childhood cancer cases, we are one of the most well-resourced continents. The question is, how can we use our knowledge, technology and resources to help the rest of the world.  A big part of this role is to make connections and liaisons to move the needle on improving outcomes.

The other thing we’ve learned from a research standpoint is that pediatric cancers are relatively uncommon and are becoming even rarer through molecular classification, which divides cancers into small genetically defined subgroups.  While these advances are tremendously exciting, they require international collaboration to amass a sufficient number of patients to evaluate novel treatment strategies.  My vision for SIOP North America is to be a convener of researchers and connect people around the world to facilitate that work.

  1. What are some of your goals while serving as continental president?

We recently sent a survey to more than 450 SIOP North America members and had a nearly 45% response rate, which I’m told is superb.  This speaks to an excellent level of engagement in SIOP’s mission, with many members volunteering to participate in committees related to research, advocacy and global health. The majority of the respondents to the survey were physicians but improving childhood cancer treatment takes a holistic approach.  One of my main goals is to increase SIOP North American membership to grow the number of nurses, pharmacists, scientists, psychologists, other behavioral health specialists and clinical research coordinators onboard.

I’d like to also identify two to three very specific projects that will impact pediatric cancer care on a global level. There are different ways to do that. We could improve education in different areas around the world (nursing education that we provide to areas that are lacking nursing support, for example). It could be research education and database education for regions of the world that would like to develop more robust research programs. It can also be medical support and developing medical guidelines for oncologists around the world that are adjusted to different levels of resources that are available.

The other goal would be to enhance supportive care and education for cancer care delivery on the global level.

  1. Why is this work important for you?

One of my mentors from when I was a junior faculty member advised me that to be a well-rounded oncologist, one must be familiar with how childhood cancer is treated around the world because different regions have different approaches. There is something to be learned from everyone.  I took that advice to heart and have tried to look beyond the North American approaches.  I think it’s very important to have a global exchange of ideas and serving as continental president of SIOP-North America will enable more to facilitate this dialogue.

  1. What’s the legacy or impact you hope to leave behind?

SIOP North America has a strong and devoted membership but has largely functioned at the level of the individual members.  I hope to bring more structure to the organization to tackle the global challenges of childhood cancer treatment.

Once this structure is in place, I hope to complete two or three SIOP-North America initiatives that have a measurable impact on improving childhood cancer care delivery or outcomes.  The specific projects have yet to be defined but will likely be in the categories of enhancing education, supportive care and facilitating research infrastructure. There’s so much to tackle that if you just look at the overall problem of childhood cancer, it’s overwhelming.  We’re not going to be able to solve everything in three years, but if we could have a few victories and be able to move the needle in some areas, I think that would be a huge success.

Dr. Matthew Bramble, Vincent Kambale, and Neerja Vashist

Gut microbiome may impact susceptibility to konzo

Dr. Matthew Bramble, Vincent Kambale, and Neerja Vashist

From left to right: Dr. Matthew Bramble, Vincent Kambale, and Neerja Vashist. Here, the team is processing samples in the field collected from the study cohort prior to storage in liquid nitrogen. Bramble et al. Nature Communications (2021).

Differences between gut flora and genes from konzo-prone regions of the Democratic Republic of Congo (DRC) may affect the release of cyanide after poorly processed cassava is consumed, according to a study with 180 children. Cassava is a food security crop for over half a billion people in the developing world. Children living in high-risk konzo areas have high glucosidase (linamarase) microbes and low rhodanese microbes in their gut, which could mean more susceptibility and less protection against the disease, suggest Children’s National Hospital researchers who led the study published in Nature Communications.

Konzo is a severe, irreversible neurologic disease that results in paralysis. It occurs after consuming poorly processed cassava — a manioc root and essential crop for DRC and other low-income nations. Poorly processed cassava contains linamarin, a cyanogenic compound. While enzymes with glucosidase activity convert starch to simple sugars, they also break down linamarin, which then releases cyanide into the body.

Neerja Vashist learning how to make fufu

Neerja Vashist is learning how to make fufu. Fufu is a traditional food made from cassava flour, and the cassava flour used in the making of the fufu here has gone through the wetting method to further remove toxins from the cassava flour prior to consumption. Bramble et al. Nature Communications (2021).

“Knowing who is more at risk could result in targeted interventions to process cassava better or try to diversify the diet,” said Eric Vilain, M.D., Ph.D., director of the Center for Genetic Medicine Research at Children’s National. “An alternative intervention is to modify the microbiome to increase the level of protection. This is, however, a difficult task which may have unintended consequences and other side effects.”

The exact biological mechanisms underlying konzo disease susceptibility and severity remained poorly understood until now. This is the first study to shed light on the gut microbiome of populations that rely on toxic cassava as their primary food source.

“While the gut microbiome is not the sole cause of disease given that environment and malnourishment play a role, it is a required modulator,” said Matthew S. Bramble, Ph.D., staff scientist at Children’s National. “Simply stated, without gut microbes, linamarin and other cyanogenic glucosides would pose little to no risk to humans.”

To understand the influence of a detrimental subsistence on the gut flora and its relationship to this debilitating multifactorial neurological disease, the researchers compared the gut microbiome profiles in 180 children from the DRC using shotgun metagenomic sequencing. This approach evaluates bacterial diversity and detects the abundance of microbes and microbial genes in various environments.

The samples were collected in Kinshasa, an urban area with diversified diet and without konzo; Masi-Manimba, a rural area with predominant cassava diet and low prevalence of konzo; and Kahemba, a region with predominant cassava diet and high prevalence of konzo.

Dr. Nicole Mashukano and Dr. Matthew Bramble wetting cassava flour

From left to right: Dr. Nicole Mashukano and Dr. Matthew Bramble. Dr. Mashukano leads the efforts in Kahemba to teach the wetting method to individuals in different health zones. The wetting method is used as an additional step to further detoxify toxins from cassava flour prior to consumption. Here, Dr. Mashukano and Dr. Bramble are spreading out the wet mixture of cassava flour and water into a thin layer on a tarp for drying in the sun, which allows cyanogen breakdown and release in the form of hydrogen cyanide gas. Bramble et al. Nature Communications (2021).

“This study overcame many challenges of doing research in low-resource settings,” said Desire Tshala-Katumbay, M.D., M.P.H., Ph.D., FANA, co-senior author and expert scientist at Institut National de Recherche Biomédicale in Kinshasa, DRC, and professor of neurology at Oregon Health & Science University. “It will open novel avenues to prevent konzo, a devastating disease for many children in Sub-Saharan Africa.”

For next steps, the researchers will study sibling pairs from konzo-prone regions of Kahemba where only one sibling is affected with the disease.

“Studying siblings will help us control for factors that cannot be controlled otherwise, such as the cassava preparation in the household,” said Neerja Vashist, Ph.D. candidate and research trainee at Children’s National. “In this work, each sample had approximately 5 million DNA reads each, so for our follow-up, we plan to increase that to greater than 40 million reads per sample and the overall study cohort size. This study design will allow us to confirm that the trends we observed hold on a larger scale, while enhancing our ability to comprehensively characterize the gut microbiome.”