Dominican Gene Mutation Linked to Severe Heart Problems: New Study Reveals Risk Factors

A new study led by a Dominican doctor in New York has, for the first time, linked individuals of Dominican descent to a rare genetic mutation associated with serious heart problems. This finding could significantly alter how cardiologists evaluate patients of Dominican heritage, both in New York City and nationally. The research, published last year in the journal of the American Heart Association, highlights a previously underrecognized genetic risk within this population.

The investigation, analyzing data from over 12,000 individuals of Hispanic origin – 10% of whom were Dominican – within the Albert Einstein College of Medicine/Montefiore database, revealed that approximately one in 40 Dominicans carry the Val122Ile variant. This mutation is also found in individuals of non-Hispanic African ancestry, but its prevalence within the Dominican population is notably higher. Yale School of Medicine

This mutation is the cause of cardiac amyloidosis, a rare and understudied condition historically linked primarily to African Americans or those of African descent. The disease is characterized by the buildup of abnormal proteins (amyloid) in the heart tissue, leading to stiffness, heart failure, and impaired heart function.

The study demonstrated that the prevalence of cardiac amyloidosis in Dominicans is roughly 10 times greater (1 in 40, or 2.6%) compared to other Hispanic groups, despite a smaller sample size within that population. This suggests a unique genetic predisposition within the Dominican community.

Understanding the Genetic Link and Ancestry

Of the 1,195 Dominican participants in the study, 94.4% were Dominican immigrants residing in the Bronx, New York. This concentration provides valuable insight into the genetic makeup of this specific population. Dr. Priscilla Durán Luciano, the lead researcher, explained that the higher prevalence of the Val122Ile variant is likely tied to the historical African ancestry present within the Dominican population. Bronx Times

“what I want is to educate the population and ensure that both patients and doctors don’t exclude Dominicans from new treatments, new therapies, and diagnostic studies. We shouldn’t be a population with a hidden risk,” Dr. Durán Luciano stated. Her research emphasizes the importance of considering genetic factors when assessing cardiovascular health in Dominican patients.

The study, with Dr. Durán Luciano as principal investigator and corresponding author, was published in a leading cardiology journal, the second most essential publication in the field worldwide. This underscores the significance of the findings and their potential impact on clinical practice.

Why This Research Began

Dr. Durán Luciano’s interest in this area stemmed from a personal observation and a gap in existing research. “In the United States, there isn’t much data on Hispanics regarding cardiac amyloidosis; in fact, none existed. But as a Dominican, one always grows up hearing that ‘you have the Black behind your ear.’ That was part of what inspired me.” This common saying reflects an awareness of African ancestry within the Dominican community and prompted Dr. Durán Luciano to investigate whether this heritage might contribute to a higher risk of cardiac amyloidosis.

She questioned why this disease hadn’t been studied in individuals with Dominican heritage, given the known association with African ancestry. Her research confirmed her hypothesis: Dominicans do carry the mutation at a higher proportion.

Further analysis revealed that among Dominicans, those carrying the mutation had a greater proportion of African ancestry compared to those with more Spanish or Indigenous (Taíno) heritage. This reinforces the link between genetic background and the prevalence of the Val122Ile variant.

Implications for the Dominican Population

The discovery is crucial because cardiac amyloidosis is a serious form of heart failure that is often incurable. Identifying Dominicans as a high-risk population allows for earlier detection and potentially prevents the progression to fulminant heart failure. Currently, doctors in the United States may not consider amyloidosis as a likely diagnosis in Hispanic patients, as it has historically been associated with African Americans.

Dr. Durán Luciano’s findings will equip physicians with the knowledge to recognize the increased risk in Hispanic and Dominican individuals, leading to more accurate diagnoses and appropriate treatment strategies.

The study’s findings are applicable not only to Dominicans in the United States, particularly the large immigrant population in the Bronx, New York, but also to those residing in the Dominican Republic. The genetic factors remain consistent regardless of geographic location.

What Does This Indicate for Patients?

Even as carrying the mutation doesn’t guarantee the development of the disease, it does warrant ongoing monitoring. Symptoms of cardiac amyloidosis typically appear after age 65. Individuals diagnosed with the mutation at a younger age (30s, 40s, or 50s) can undergo regular diagnostic testing, such as nuclear scans, to detect early signs of amyloid protein deposits in the heart. Early detection is key to managing the condition and potentially slowing its progression.

Dr. Durán Luciano has also presented her findings at national conferences, including the American Heart Association in Chicago, sharing both the prevalence data and echocardiogram results. Her research showed that younger individuals with the mutation currently have normal heart function, but this may change as they age.

Future Directions and Policy Implications

Dr. Durán Luciano is collaborating with leading experts in cardiac amyloidosis, including Dr. Mann Mauder from Columbia University, on a follow-up study to identify other mutations that may contribute to the disease in the Hispanic population. This expanded research will provide a more comprehensive understanding of the genetic landscape of cardiac amyloidosis and inform future public health policies.

“Before our operate, there was no data on whether cardiac amyloidosis could affect Hispanics and Dominicans. We need more data because it simply doesn’t exist,” Dr. Durán Luciano explained. The goal is to incorporate these findings into international guidelines and policies to ensure equitable healthcare for all populations.

Discussions with Dominican health authorities are planned, with Dr. Durán Luciano offering to translate her research and present it in Spanish.

A Message to Young Dominicans

As a principal investigator, Dr. Durán Luciano hopes her discovery will empower individuals of Dominican descent to advocate for their health. “If the reader is a member of the general Dominican population, I want them to know that we have a cardiovascular risk for a specific type of heart failure that is seen in older adults. It’s important because many of our loved ones may have heart failure without a known cause, but my research plants the seed of doubt that it may be genetic.”

She encourages individuals to discuss their family history and genetic risk with their doctors. For healthcare professionals, she emphasizes the need to consider cardiac amyloidosis as a potential diagnosis in Dominican patients, even in the absence of obvious risk factors.

Dr. Durán Luciano’s journey as a Dominican immigrant leading this groundbreaking research is a testament to the power of perseverance and dedication. “I feel very honored to have the opportunity to be here. My main mentor is a Dominican doctor, Dr. Carlos J. Rodríguez, a leading expert in cardiology in the United States, and throughout his professional career he has focused on providing data and conducting research in cardiology in Hispanics.” She is proud to represent the Dominican Republic on the international stage and contribute to more inclusive medical research.

Currently, Dr. Durán Luciano is also investigating differences in cardiovascular risk equations used in the United States to prescribe cholesterol medications, evaluating a more inclusive equation that doesn’t include racial components. This work recently earned her a national award from the American Heart Association for excellence in research addressing cardiovascular health equity. American Heart Association

Looking ahead, ongoing surveillance and further research will be crucial to refine risk assessments and develop targeted interventions for the Dominican population and other at-risk Hispanic communities.