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New possibilities for leukemia therapy with a novel mode of leukemia cell recognition
Date:6/24/2014

Singapore, 24 June 2014Scientists at A*STAR's Singapore Immunology Network (SIgN) have discovered a new class of lipids in the leukaemia cells that are detected by a unique group of immune cells. By recognising the lipids, the immune cells stimulate an immune response to destroy the leukaemia cells and suppress their growth. The newly identified mode of cancer cell recognition by the immune system opens up new possibilities for leukaemia immunotherapy .

Leukaemia is characterized by the accumulation of cancer cells originating from blood cells, in the blood or bone marrow. Current treatments for leukaemia largely involve chemotherapy to eradicate all cancer cells, followed by stem cell transplants to restore healthy blood cells in the patients.

In a recent study reported in the Journal of Experimental Medicine (JEM) online, the team co-led by Dr Lucia Mori and Prof Gennaro De Libero identified a new class of lipids, methyl-lysophosphatidic acids (mLPA), which accumulate in leukaemia cells. Following which, the team identified a specific group of immune cells, described as mLPA-specific T-cells that are capable of recognising the mLPA in the leukaemia cells. The detection triggers an immune response that activates the T cells to kill the leukaemia cells and limits cancer progression. The efficacy of the T cells in killing leukaemia cells was also demonstrated in a mouse model of human leukaemia.

Thus far, only proteins in cancer cells have been known to activate T cells. This study is a pioneer in its discovery of mLPA, and the specific T cells which can identify lipids expressed by cancer cells. Unlike proteins, lipids in cancer cells do not differ between individuals, indicating that the recognition of mLPA by mLPA-specific T-cells happens in all leukaemia patients. This new mode of cancer cell recognition suggests that the T-cells can potentially be harnessed for a leukaemia immunotherapy that is effective in all pa
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Contact: Tan Yun Yun
tan_yun_yun@a-star.edu.sg
65-682-66273
Biomedical Sciences Institutes (BMSI)
Source:Eurekalert

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