Rituximab and Regulator B cells
I just wanted to add this tid bit to the discussion here of great news
but go cautious plz!
A year ago I was studying some new research with MS and other Auto Immune disorders. They were talking about newly discoverd regulatory B cells (that tell T cells what to do). "Now it seems that T-cells are not the immune system's only regulators. Experiments suggest that under some circumstances, B regs regulate T-cells, providing a shadow role for B cells.
"Diseases we've traditionally thought to be mediated by T-cells might actually be regulated by B cells," says Kevan Herold of Columbia University in New York. Boosting B regs might therefore provide new opportunities for treating autoimmune diseases, while inhibiting B regs it could be a new way to treat cancer."
They found when using Rituximab Chemo to rid the body of ALL B cells that in short time the B cells that came back were B reg10 cells ONLY "These are major regulators of the immune system in allergic disease," Fallon concludes. B regs seemed to work by releasing a chemical called IL-10 into the lungs, drawing in regulatory T- cells (T regs), which in turn inhibited immune attacks.
IL-10 played a similar role in a subset of B regs, which Thomas Tedder at Duke University School of Medicine in Durham, North Carolina, calls B10 cells. (the kind they thought responsable for intsructing T cells to kill cancer which kills B cells). "First prescribed for the treatment of B cell lymphoma, a type of cancer, the drug has also reduced symptoms in people with diabetes, MS and rheumatoid arthritis. Rituximab most likely knocked out all the B cells to start with, and then, for some reason only the B regs grew back, which helped suppress autoimmunity, suggests Frances Lund of the University of Rochester Medical Center in New York (Nature Reviews Immunology, DOI: 10.1038/nri2729)."
"In individuals with cancer, however, it might be desirable to suppress B regs. Preliminary evidence suggests that as well as keeping autoimmunity in check, B regs also help dampen the immune system's natural ability to recognise and destroy tumours.
Tedder's team has already created antibodies that can deplete B10 cells - but not other B cells - in mice, and says he has similar antibodies that may selectively deplete human B10 cells - although he hasn't yet tested them in people.
Arya Biragyn of the US National Institute of Aging, and his colleagues, also announced at the Baltimore meeting that they have identified a separate set of B regs that cancer seems to recruit in order to avoid detection by the immune system. Destroying these cells might make let's hope you have deep pockets cancer immunotherapies work better.
"Even if you transiently wipe out B cells during immunotherapy, this should give you very potent anti-tumour responses against hidden tumour cells, Biragyn says."
Also Corts write up on from page mentions Dr. Peterson and the use of Rituxamib and the differing B cell types? ( I need to read that part again as I think this is Key to what they need to research for us here and other auto immune disorders.)