Natural killer cells: Innate immune system as a part of adaptive immunotherapy in hematological malignancies

Abstract

Natural killer (NK) cells are part of a phylogenetically old defense system, which is characterized by its strong cytolytic function against physiologically stressed cells such as tumor cells and virus‐infected cells. Their use in the treatment of hematological malignancies may be more advantageous in several ways when compared with the already established T lymphocyte‐based immunotherapy. Given the different mechanisms of action, allogeneic NK cell products can be produced in a non‐personal based manner without the risk of the formidable graft‐versus‐host disease. Advanced manufacturing processes are capable of producing NK cells relatively easily in large and clinically sufficient numbers, useable without subsequent manipulations or after genetic modifications, which can solve the lack of specificity and improve clinical efficacy of NK cell products. This review summarizes the basic characteristics of NK cells and provides a quick overview of their sources. Results of clinical trials in hematological malignancies are presented, and strategies on how to improve the clinical outcome of NK cell therapy are discussed.

Tuning CARs: recent advances in modulating chimeric antigen receptor (CAR) T cell activity for improved safety, efficacy, and flexibility

“…gov). In addition to conventional T cells, several other immune cell types, including NK cells and γδ T cells, are being successfully explored for cancer immunotherapy [202][203][204][205].…”

Overcoming the challenges in translational development of natural killer cell therapeutics: An opinion paper

“…Cellular therapies have attracted huge research and clinical attention lately (1,2). Natural killer cells (NKCs) are a class of innate immune lymphoid cells (ILP) mainly derived from bone marrow lymphoid stem cells (3). They are mainly distributed in peripheral blood (PB) and peripheral lymphoid tissues, accounting for about 10% of the total lymphocytes in PB (4)(5)(6)(7).…”