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Freezing the graft is not necessary for autotransplants for plasma cell myeloma and lymphomas.

07:00 EST 12th January 2018 | BioPortfolio

Summary of "Freezing the graft is not necessary for autotransplants for plasma cell myeloma and lymphomas."

We studied rates of granulocyte and platelets recovery in 359 consecutive subjects receiving blood cell infusions in the context of autotransplants for plasma cell myeloma (N = 216) and lymphomas (N = 143). Blood cells were mobilised with filgrastim given for 4-5 days and collected after a median of 2 (range, 1-2) apheresis. Apheresis products were stored at 4° C for a median of 3 days (range, 2-6 days). Most subjects received carmustine, etoposide, cytarabine and melphalan (BEAM), cyclophosphamide, carmustine and etoposide (CBV) or high-dose melphalan. Filgrastim was given post transplant to 319 subjects. Median numbers of mononuclear cells collected was 31 × 10E + 6/kg (interquartile range (IQR) 37 × 10E + 6 cells/kg). Median numbers of CD34-positive cells collected was 3.6 × 10E + 6/kg (IQR 3.8 × 10E + 6/Kg). Median viability after collection was 90% (IQR 7%) after storage, 88% (IQR 12%). A total of 255 of 256 evaluable subjects recovered bone marrow function and there was no late bone marrow failure. Median interval to neutrophils >0.5 × E + 9/L was 13 days (range, 9-39 days) and to platelets >20 × 10E + 9/L, 16 days (range, 7-83 days). These rates and ranges seem comparable to those reported after autotransplants of frozen blood cells. There was no correlation between numbers of storage days at 4 °C and viability afte storage (r = -0.018, p = 0.14)) nor rates of recovery of neutrophils (r = -0.054, p = 0.52) or platelets (r = 0.116, p = 0.14). Blood cells collected for autotransplant can be stored at 4 °C for 6 d. This method is simple, inexpensive and widely applicable.

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This article was published in the following journal.

Name: Bone marrow transplantation
ISSN: 1476-5365
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Medical and Biotech [MESH] Definitions

An asymptomatic and slow-growing PLASMA CELL dyscrasia characterized by presence of MYELOMA PROTEINS and clonal bone marrow plasma cells without end-organ damage (e.g., renal impairment). It is distinguished from MONOCLONAL GAMMOPATHY OF UNDETERMINED SIGNIFICANCE by a much higher risk of progression to symptomatic MULTIPLE MYELOMA.

A rare, aggressive variant of MULTIPLE MYELOMA characterized by the circulation of excessive PLASMA CELLS in the peripheral blood. It can be a primary manifestation of multiple myeloma or develop as a terminal complication during the disease.

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