Leukapheresis is a laboratory procedure to separate white blood cells from a sample of blood which can occur with chronic lymphocytic leukemia (CLL). Leukapheresis is a good treatment option for patients who have very high white blood cell count or to obtain white blood cells for later transplant to treat decrease in white blood cells during chemotherapy. It also helps fighting prostate cancer and other form of cancers.
Earlier, leukapheresis was designed for palliative treatment for leukemia with only limited efficacy. But later as this technique was used for treatment modality for hyperleukocytic acute myeloid leukemia, and now it is also used to collect granulocytes to transfuse into neutropenic patients with bacterial or fungal infections, the growth of adoption of this technique is expected to increase.
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How Leukapheresis is important for CAR or Adaptive Cell Therapy Manufacturing?
Chimeric antigen receptor (CAR) T cell therapy may be offered to people when their cancer comes back. Leukapheresis is the first step in this treatment. Research is going on for this treatment. Researchers want to collect T cells from people who may become eligible for a CAR T-cell study in the future. Leukapheresis is an essential step for CAR therapy or other adaptive cellular therapy products. The procedure is required to develop a streamlined process where patients have to undergo apheresis for development of a CAR cell or other adoptive cell therapy product. Once patient meets the eligibility conditions for one of the NCI CAR clinical cell therapy trials, they will undergo leukapheresis estimated by recipient weight and target cell harvest dose in Department of Transfusion Medicine (DTM). Therefore, need for leukapheresis in CAR therapy is a major factor for the boost in its adoption.
Cases of leukemia have been increasing significantly. According to American Cancer Society, in 2020, there were 60,530 new cases of all kinds of leukemia which witnessed 23,100 deaths. Acute myeloid leukemia being the most prevalent accounted for 19,940 cases in US. The cancer burden in Europe is estimated to have risen to 2.7 million new cases and 1.3 million deaths in Europe as per the Joint Research Centre in European Union. Therefore, it is expected that the rising cases of leukemia and cancer may pave a way of growth for leukapheresis.
Side Effects of Leukapheresis may restrain the Growth
Like any other medical treatment, leukapheresis also have some risks and side effects which may decline its growth. Hypocalcemia, anemia, local or systematic infections may occur among the patients. Hypocalcemia is an irregular drop of calcium from the body when white blood cells are extracted. The lack of calcium in the body may cause numbness, muscle spasms, etc. Anaemia can also occur due to low count of red blood cells or platelets which may happen during the process. Although, in most of the cases, the effect of anaemia is mild. Local or systematic infections, redness and bruising at the vein puncture may also happen. All these side effects can cause the patients to decline the treatment if it is not very important.
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