Immunologists from The University of Texas, using a new imaging technique, may have discovered a way T-cells could be manipulated to combat autoimmune disorders.
For the first time, immunologists from The University of Texas, USA, have captured on video what happens when T-cells, responsible for wiping out bacteria and viruses, undergo a form of natural-human-body-assassin-training program before they get unleashed in the body. A new imaging technique that allowed for the videos, described in the journal Nature Communications, holds promise for the fight against autoimmune disorders such as Type 1 diabetes.
Autoimmune disorders and T-cells
One of the human body’s most potent weapons against many diseases is the T-cell, but in people with autoimmune disorders, T-cells also inflict chaos by mistaking normal cells for invaders and attacking healthy parts of the body.
One of the authors of the study, Associate Professor Lauren Ehrlich, explains: “T-cells have the daunting task of recognising and fighting off all of the diverse pathogens that we encounter throughout our lives, while avoiding attacking our own healthy tissue.”
“These cells mature in the thymus, an organ just above the heart, where they ‘get educated’ to not attack the body.”
Ehrlich and postdoctoral researcher Jessica Lancaster captured video of this educational process in a mouse thymus. Using a pair of powerful lasers that fire in short pulses and scan through a slice of live tissue every 15 seconds to reconstruct the positions, movements and intracellular signalling of cells, they observed that as T-cells develop, other cells in the thymus help them to encounter all sorts of ordinary human proteins that, later on, the T-cells will need to ignore in order to avoid attacking other parts of the body.
Learning about the diverse function of cells
The researchers learned more about how different types of cells work together in the thymus to perform the safety tests and, in the event a T-cell fails, cause it to self-destruct.
Ehrlich says studying T-cells with this new imaging technique holds promise for improvements for human health that will depend on a better understanding of what’s happening in the thymus.
Such patients that could benefit are those who receive bone-marrow transplants and endure weeks or months with suppressed immune systems and a higher risk for developing autoimmune disorders, and people with Type 1 diabetes who have T-cells that often attack the cells in the pancreas that produce insulin.
