Tag

Genetics

All articles tagged with #genetics

18-Year Odyssey Ends with Rare Jordan Syndrome Diagnosis
health2 days ago

18-Year Odyssey Ends with Rare Jordan Syndrome Diagnosis

After 18 years of seizures, developmental delays and a string of diagnoses that never fit, Lucia Adarve was diagnosed with PPP2R5D-associated neurodevelopmental disorder (Jordan syndrome) via whole-genome sequencing at the Cleveland Clinic Undiagnosed Disease Clinic. The breakthrough provides a clear management plan, reduces seizures, connects the family with support and clinical trials, and gives Lucia a path toward greater independence, ending a long diagnostic odyssey fueled by persistent advocacy from her mother.

A Blood Type May Elevate Risk of Early-Onset Stroke, New Research Finds
health2 days ago

A Blood Type May Elevate Risk of Early-Onset Stroke, New Research Finds

A meta-analysis of 48 genetic studies (about 17,000 stroke patients and 600,000 controls aged 18–59) found that people with the A1 blood subgroup (blood type A) have about a 16% higher risk of stroke before age 60, while O1 carriers have about 12% lower risk; type B blood shows roughly 11% higher risk regardless of age. The increased risk for early stroke is small and does not warrant extra screening, and the association weakens for strokes after age 60, suggesting different mechanisms and underscoring the need for more diverse follow-up studies.

Genetics May Reveal Who Benefits From Vitamin D to Prevent Diabetes
health3 days ago

Genetics May Reveal Who Benefits From Vitamin D to Prevent Diabetes

A genetic-subgroup analysis of the D2d trial found high-dose vitamin D (4,000 IU/day) lowered progression to type 2 diabetes only for adults with AC or CC variants of the vitamin D receptor gene; those with the AA variant did not benefit. Of 2,098 participants with genetic data, about 30% had AA. This suggests a path toward personalized prevention for the roughly 115 million Americans with prediabetes, but healthcare guidance remains to avoid high-dose vitamin D without medical advice due to safety concerns and the need for more research.

Genes May Set Half Your Lifespan, New Study Finds
science4 days ago

Genes May Set Half Your Lifespan, New Study Finds

New research suggests genetic factors account for about 50% (roughly 50–55%) of human lifespan, higher than previous estimates. Using twin simulations and real-world data, researchers show that extrinsic mortality and historical age cutoffs biased earlier heritability estimates downward; when corrected, heritability rises to about half. Scandinavian twin data and studies of siblings of centenarians corroborate the finding, pointing aging research toward identifying the specific genetic variants that govern longevity.

Sleep Signals: Poor Sleep Linked to Alzheimer’s Risk in High-Risk Older Women
health5 days ago

Sleep Signals: Poor Sleep Linked to Alzheimer’s Risk in High-Risk Older Women

Among 69 women aged 65+ with high genetic risk for Alzheimer’s, poorer sleep quality correlated with worse visual memory and greater tau buildup in brain regions tied to the disease, strongest in the highest-risk group. The finding is observational, not causal, and researchers will collect more data to see if improving sleep could mitigate risk.

Ancient Genetic Switch Shapes Wing Patterns Across Lepidoptera
science8 days ago

Ancient Genetic Switch Shapes Wing Patterns Across Lepidoptera

An international study finds that distantly related Lepidoptera rely on the same two genes, ivory and optix, controlled by regulatory switches, to produce identical wing color patterns across 120 million years of evolution, via Müllerian and Batesian mimicry; the work suggests evolution may be more predictable than previously thought, with mutation hotspots enabling rapid adaptation, including an inversion mechanism in some moths and genetic modification confirming the gene’s role in color.

Tiny DNA switches shaped language long before modern humans
science8 days ago

Tiny DNA switches shaped language long before modern humans

Scientists identify HAQERs—tiny regulatory DNA regions—that disproportionately influence language ability. These ancient switches predate the human–Neanderthal split and are even found in Neanderthals, suggesting language biology existed earlier than previously thought. Using an evolutionary-stratified polygenic score, researchers describe HAQERs as “volume knobs” for gene regulation that build brain hardware for language while other genes drove broader cognitive gains. The study points to an evolutionary tradeoff: HAQERs supported fetal brain growth and language groundwork but leveled off, with future work aiming to separate genetic effects from environmental factors on language development.

Living Location Alters Aging Pace, Global Study Finds
science8 days ago

Living Location Alters Aging Pace, Global Study Finds

A world-spanning study profiled 322 people from Europe, East Asia, and South Asia, analyzing DNA, proteins, fats, gut bacteria, immune markers, and metabolites. It found that ancestry provides a baseline for immunity, metabolism, and the microbiome, but where people live also reshapes aging trajectories—different populations show distinct aging patterns when relocated. East Asians outside their region aged biologically faster; Europeans aged more in Europe; gut microbes linked to sphingolipids were tied to telomere maintenance. The work underscores that precision medicine must account for both genetics and environment, and is published in Cell (2026).

Hidden Lipoprotein(a) May Raise Heart Risk Even With Normal Tests
health12 days ago

Hidden Lipoprotein(a) May Raise Heart Risk Even With Normal Tests

Lp(a) is a genetically determined cholesterol particle linked to higher risk of heart attack and stroke that standard tests miss. Lifestyle and most cholesterol meds don’t meaningfully lower Lp(a); newer gene-silencing therapies show large reductions in Lp(a) in trials and could reduce events if confirmed. Testing is often advised for those with a family history or unexplained risk, but for now heart health still hinges on managing LDL cholesterol, blood pressure, smoking, activity, and diet.

X-Chromosome Long Non-Coding RNA Emerges as a New Route to Autism Traits in Males
science12 days ago

X-Chromosome Long Non-Coding RNA Emerges as a New Route to Autism Traits in Males

Researchers identify PTCHD1-AS, a long non-coding RNA on the X chromosome, as a male-specific autism-susceptibility gene. Deletions skew social interaction and repetitive behaviors without impairing learning or memory; mouse models show similar behavioral changes. Disruption affects striatal circuits, synaptic plasticity, and myelination via reduced protein kinase C activity, offering a new entry point for targeted therapeutics—though no treatments are yet in trials.

Ancient Hibernation Switch Lurking in Human DNA Could Power New Metabolic Therapies
science12 days ago

Ancient Hibernation Switch Lurking in Human DNA Could Power New Metabolic Therapies

Scientists have found humans harbor ancient regulatory DNA switches shared with bears and bats that govern metabolic shifts during fasting and recovery; by safely modulating these cis-regulatory elements, they could enhance metabolic flexibility and insulin sensitivity, protect organs during stress, and inform therapies for diabetes and aging without requiring actual hibernation.

Bacteria Survive on 19 Amino Acids in Ribosomes for 450 Generations
science12 days ago

Bacteria Survive on 19 Amino Acids in Ribosomes for 450 Generations

Columbia University researchers redesigned 21 ribosomal proteins in E. coli to remove isoleucine, using AI-guided protein design, and created a viable strain that survived and reproduced for over 450 generations. The genome still largely relies on isoleucine, so it's not a full 19-amino-acid organism, but the work shows life can function with a reduced amino acid alphabet and provides a framework for studying early protein synthesis.