Cryostorage of peripheral blood hematopoietic stem cells in transplantology: current status and prospects

Abstract

Peripheral blood hematopoietic stem cell (HSC) transplantation is a well-established procedure for the treatment of hematological, cancer and autoimmune diseases. In cancer patients, HSC transplantation allows the use of high-dose cytotoxic drugs in combination with radiation therapy during treatment, which provides a pronounced antitumor effect. The hematological toxicity of such treatment is eliminated by the sequential introduction of stem cells, which contribute to hematopoiesis restoration. Before transplantation, peripheral blood HSCs are subjected to collection and cryopreservation for further storage. An important requirement for cryopreservation is viable HSCs responsible for hematopoietic restoration. The aim of the review was to analyze the literature devoted to the influence of various methods of cryopreservation of human peripheral blood HSCs on the preservation of cell viability after thawing, as well as the development of adverse events in patients. Issues related to the use of various cryoprotectants, as well as methods for storing HSC grafts, are considered. The presented data indicate the need for further study of the effect of cryoprotectants on the human body and the cellular composition of the graft and improvement of protocols for HSC cryopreservation.