How rogue immune cells cross the blood-brain barrier to cause multiple sclerosis uic today cirugia de columna lumbar recuperacion

In multiple sclerosis, immune cells degrade the insulation that protects hernia de disco lumbar ejercicios contraindicados neurons and allows them to signal to one another, but little is known about how immune cells penetrate the blood-brain barrier to get to neurons. Researchers led by sarah lutz, university of illinois at chicago college of medicine while she was a post-doctoral fellow of dritan agalliu at columbia university; and sunil gandhi, university dolor lumbar bajo of california, irvine, have uncovered two different ways immune cells gain access to neurons and wreak their havoc.

Multiple sclerosis is a neurodegenerative inflammatory disease that affects approximately 2.5 million people worldwide. Immune cells turn against the body and cause damage to the myelin dolor lumbar ejercicios sheath, which encases neurons like the insulation on a wire.

Loss of myelin interferes with the transmission of signals along the nerve fibers and impairs motor function, including walking and speech. Symptoms, which can be sporadic or progressive, range from mild to debilitating.

The blood-brain barrier is a bit of a misnomer. It not only protects the brain, but also the spine, and refers to the fact that blood vessels that supply the brain and enfermedades lumbares spine are virtually impermeable because the cells that make up those blood vessels — called endothelial cells — are bolted tightly together by protein complexes called tight junctions. This prevents certain chemicals, harmful microbes and cells that circulate in the blood from gaining access escoliosis izquierda to the brain and spine. In blood vessels that supply other escoliosis dorsal derecha sintomas organs of the body, endothelial cells are more loosely bound to one another and the connections can be adjusted to allow for the exchange of molecules and cells from the bloodstream into tissues and vice versa.

“in autoimmune diseases like multiple sclerosis, immune cells that enter the brain and spinal cord cause disease,” said lutz, assistant professor escoliosis dorsal izquierda of anatomy and cell biology in the UIC college of medicine and the lead author of the paper. “A better understanding of how these cells cross the blood-brain barrier will aid our efforts to develop specific therapies to keep them out.”

They genetically labeled blood vessel endothelial cell tight que es escoliosis dorsolumbar junctions with a fluorescent protein to examine if and how tight junctions are involved in autoimmune encephalomyelitis in vivo in their mice. The researchers observed that the tight junctions were significantly deteriorated in the presence of th17 cells, and that this took place early in the onset dolor lumbar derecho rinon of disease. Approximately three days later in the disease process, lutz and colleagues found that th1 cells were accessing and degrading myelin and neurons — but these cells did not pass through tight junctions like the th17 cells did. Instead, the circulating th1 cells got to neurons by going through the blood vessel endothelial escoliosis dorsal derecha cells using specialized cell membrane structures called caveolae. Caveolae are small pits or “caves” found on the surface of many cell types and help facilitate the passage of various molecules and cells into and/or through cells. In mice with autoimmune encephalomyelitis bred to lack caveolae, the researchers found almost no th1 dieta para radiografia de columna lumbosacra cells in the brain and spinal cord. They determined that caveolae on endothelial cells that make up blood vessels are required to help ferry th1 cells through the blood-brain barrier.

“this is the first time we have ever seen, in live animals in real-time, the different means by which these two cell types gain access desviacion lumbar to myelin and nerves,” said lutz. “now that we know how these cells get to neurons, drugs or small molecules can be designed that interfere with or block each of these processes to help treat and possibly prevent multiple sclerosis dolor lumbar izquierdo cadera.”

This research was supported by grants R01 HL116995, R56 MH109987 and R01 MH112849 from the national institutes rx de columna lumbosacra of health; grants MNSS RG4673A1/1 and FG2035-A-1 from the national multiple sclerosis society, and funds from the leducq foundation, and from john castle to the department of neurology and stroke division at the columbia university medical center.