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How An Anticancer Drug Dampens The IS ?
{image- www.boldsky.com} A team of researchers including an Indian scientist has discovered how an anticancer drug dampens the immune system.
HDAC inhibitors, which have anti-tumour activity and can be used to treat some forms of skin cancer and some types of leukemia, are also known to have anti-inflammatory properties.
However, the mechanisms by which they modulate the immune system have not been determined.
Now, a new study by Pavan Reddy and colleagues, at the University of Michigan Cancer Center, Ann Arbor, has indicated one mechanism by which HDAC inhibitors modulate the mouse and human immune system.
And researchers have used the information to develop an approach to protect mice from graft-versus-host disease after bone marrow transplantation.
In the study, two different HDAC inhibitors were shown to prevent mouse and human immune cells known as dendritic cells (DCs) from initiating proinflammatory immune responses in vitro.
Further, if DCs treated ex vivo with HDAC inhibitors were injected into mice after they had received a bone marrow transplant, the incidence and severity of graft-versus-host disease was dramatically reduced.
Results of a detailed analysis revealed that the HDAC inhibitors mediated their effects by inducing DCs to express more of a molecule known as IDO, which is a suppressor of DC function.
According to researchers, their data provide support for studies to determine whether HDAC inhibitors might be of benefit to individuals receiving bone marrow transplants and to those with other immune-mediated diseases.
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