Annotated

Minor Spliceosome Defects Drive Monogenic Autoimmune Diabetes

jason.armstrong@varsome.com (Jason Armstrong) — Tue, 21 Apr 2026 15:10:30 GMT

Early-onset diabetes is often monogenic, but a substantial fraction of cases remain genetically unexplained even after genome sequencing. This diagnostic gap has focused attention on the non-coding genome, where variants can disrupt gene regulation and RNA processing without altering protein sequence.

Promoter Editing and Fetal Hemoglobin Reactivation in Sickle Cell Disease

jason.armstrong@varsome.com (Jason Armstrong) — Tue, 21 Apr 2026 15:10:10 GMT

Sickle cell disease is an inherited blood disorder characterized by chronic hemolytic anemia, recurrent vaso-occlusive events, and progressive organ damage. Current disease-modifying therapies can reduce symptoms, but they do not address the underlying genetic cause. Allogeneic hematopoietic stem-cell transplantation offers a potential cure, but its use is limited by donor availability and the risk of graft-versus-host disease.

A Transcriptional Mechanism for GLP-1 Action in Pancreatic β-Cells

jason.armstrong@varsome.com (Jason Armstrong) — Mon, 16 Mar 2026 12:20:20 GMT

GLP-1 receptor agonists have quickly become a widely used therapy for type 2 diabetes and obesity. Their ability to stimulate insulin secretion is well established, but these drugs, like Semaglutide and Tirzepatide, also appear to produce longer-term improvements in pancreatic β-cell health.

Long-Read Sequencing Brings Hidden ASD Variants into View

jason.armstrong@varsome.com (Jason Armstrong) — Mon, 16 Mar 2026 12:17:10 GMT

Autism spectrum disorder (ASD) has a strong genetic component, with rare variants and de novo mutations playing a central role in risk. Large sequencing studies over the past decade have identified hundreds of genes associated with neurodevelopmental disorders. Yet a substantial proportion of the genetic architecture of ASD remains unresolved.

How Genetic is Human Lifespan, Really?

jason.armstrong@varsome.com (Jason Armstrong) — Tue, 17 Feb 2026 09:37:03 GMT

The contribution of genetics and the environment to human lifespan has long been debated. Twin and pedigree studies over the past century, largely based on historical cohorts, have generally placed the heritability of lifespan at around 20-25%. More recent large pedigree analyses have suggested it may be even lower. These findings have fueled skepticism about whether genetic studies have anything meaningful to say about variation in human aging.

Genetic Control of the Oral Microbiome

jason.armstrong@varsome.com (Jason Armstrong) — Tue, 17 Feb 2026 09:28:54 GMT

The human oral microbiome plays an important role in dental and gingival health and has been linked to broader health outcomes. Its composition is known to vary with age, diet, hygiene, smoking, and socioeconomic factors. Yet these environmental explanations leave substantial variation unexplained. Why some individuals consistently harbour specific oral bacteria or show persistent susceptibility to oral disease remains unclear.

WHO's Who of Human Genomic Research

jason.armstrong@varsome.com (Jason Armstrong) — Mon, 12 Jan 2026 11:46:32 GMT

Human genomic technologies are now a routine part of clinical research, supporting disease diagnosis, risk stratification, treatment selection, and therapeutic development. A new World Health Organization (WHO) landscape analysis examines how these tools have been used in clinical studies over the past three decades, drawing on more than 6,500 clinical trials registered globally between 1990 and 2024¹.

Inherited Genetic Risk in Unexplained Stillbirth

jason.armstrong@varsome.com (Jason Armstrong) — Mon, 12 Jan 2026 09:05:13 GMT

Stillbirth affects around 2 million pregnancies worldwide each year and remains a major public health problem despite advances in obstetric care. It is devastating for affected families and represents a persistent public health burden driven by multiple interacting factors. Even after a detailed clinical investigation, roughly one-third of stillbirth cases have no identifiable cause, which limits prevention strategies and counseling for affected families. Familial clustering has been reported, but few inherited genetic risk factors have been clearly established.

The Mutation Signal We Missed at the Start of Our Genes

jason.armstrong@varsome.com (Jason Armstrong) — Mon, 08 Dec 2025 16:39:37 GMT

Germline mutations shape evolution and influence the risk of inherited disease. Most models treat mutation rates around genes as stable or smoothly varying, partly because they are built from de novo datasets that exclude mosaic mutations. This matters because promoters sit at the center of gene regulation and are often interpreted in clinical and evolutionary analyses. If mutational pressure around these regions is mischaracterized, measures of constraint and pathogenicity predictions can be skewed.

The Biological Signals Underlying Delirium

jason.armstrong@varsome.com (Jason Armstrong) — Mon, 08 Dec 2025 16:26:16 GMT

Delirium is a common and serious condition in older adults, especially during hospitalization. It is an acute, fluctuating disturbance of attention and awareness, distinct from the gradual decline seen in dementia. Delirium increases the risk of long-term cognitive decline, institutionalization, and death. Despite its clinical impact, the biological factors that predispose individuals to delirium are unclear. Previous studies have been small, relied on heterogeneous definitions, and offered little insight into genetic or proteomic risk.