Vivian Pinn Symposium Panel 1: Translational Autoimmune Research

One major topic focused on why women are disproportionately affected by autoimmune diseases such as lupus. Montserrat C. Anguera, PhD, presented research exploring how the X chromosome may shape immune system activity differently in women and men. Her presentation highlighted that women carry two X chromosomes and that many important immune-related genes are located on the X chromosome itself. Normally, one X chromosome is largely “silenced” through a process called X-chromosome inactivation, helping maintain balance in gene expression.

The presentation focused on abnormalities involving XIST RNA, a molecule responsible for helping organize and maintain that silencing process. In immune cells from lupus patients, researchers observed abnormal XIST RNA localization patterns alongside altered expression of X-linked immune genes. The findings raise questions about whether disruptions in normal X-chromosome regulation could contribute to the increased risk of lupus and other autoimmune diseases in women.

Researchers also discussed how these XIST-related abnormalities appear even during periods of disease remission, suggesting they may reflect deeper underlying immune dysregulation rather than inflammation alone. The work highlights a growing area of autoimmune research focused on understanding how sex-based biological differences may influence immune function, disease susceptibility, and potentially future diagnostic approaches.

The panel also examined sex-specific cardiovascular mechanisms linked to obesity and hypertension. Eric Belin de Chantemèle, DSc, presented research exploring why obesity may have unique cardiovascular effects in women. The presentation discussed how obesity-related changes in hormones and vascular signaling pathways, including leptin, aldosterone, and mineralocorticoid receptor activity, may contribute to endothelial dysfunction and elevated blood pressure.

Researchers also explored the possibility that obesity and aging, particularly after menopause, may diminish some of the cardiovascular protection typically associated with the female sex. The work highlighted how sex-specific biology may influence not only disease risk, but also how women respond to potential treatments targeting these pathways.

Rachelle Crescenzi, PhD, presented translational imaging research involving SALT MRI technology, which is designed to visualize sodium accumulation, adipose tissue, and lymphatic dysfunction in conditions such as lymphedema and lipedema. Researchers explained that improved imaging tools may help distinguish lymphatic disease from obesity and could eventually support future clinical trials and the development of treatments for conditions that currently have limited therapeutic options.

One particularly powerful aspect of Dr. Crescenzi’s presentation was a direct imaging comparison between a patient with lymphatic disease and a matched control individual. The scans highlighted differences in adipose tissue composition and tissue characteristics despite otherwise similar measurements, reinforcing that these conditions involve measurable biological differences rather than simply body size or weight alone.

The example underscored how advanced imaging tools can help validate patient experiences while advancing diagnosis and treatment research by revealing biological variations that might otherwise go unrecognized.