Biomaterial Database

Natural killer cell activity after open-heart surgery. 1984

P Ryhänen, and K Huttunen, and J Ilonen

We studied the effects of elective open-heart surgery with cardiopulmonary bypass on peripheral blood natural killer (NK) cell activity in 12 patients with heart disease. Separated mononuclear cells from patients and control cells taken from healthy volunteers were incubated in microtiter plates for 24 h with 3H-thymidine-labelled K 562 cells as target cells. In this test system, higher counts per minute (cpm) values represent a greater number of surviving target cells and thus weaker NK activity. Results of cultures prepared from blood samples taken preoperatively were compared with those taken 2, 7 and 14 days postoperatively. NK cell activity was depressed (P less than 0.01) for 2 days after surgery. NK cell activity in the control samples did not change significantly. The results show an impairment of NK cell activity immediately after open-heart surgery.

UI	MeSH Term	Description	Entries
D007694	Killer Cells, Natural	Bone marrow-derived lymphocytes that possess cytotoxic properties, classically directed against transformed and virus-infected cells. Unlike T CELLS; and B CELLS; NK CELLS are not antigen specific. The cytotoxicity of natural killer cells is determined by the collective signaling of an array of inhibitory and stimulatory CELL SURFACE RECEPTORS. A subset of T-LYMPHOCYTES referred to as NATURAL KILLER T CELLS shares some of the properties of this cell type.	NK Cells,Natural Killer Cells,Cell, NK,Cell, Natural Killer,Cells, NK,Cells, Natural Killer,Killer Cell, Natural,NK Cell,Natural Killer Cell
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D011184	Postoperative Period	The period following a surgical operation.	Period, Postoperative,Periods, Postoperative,Postoperative Periods
D002315	Cardiopulmonary Bypass	Diversion of the flow of blood from the entrance of the right atrium directly to the aorta (or femoral artery) via an oxygenator thus bypassing both the heart and lungs.	Heart-Lung Bypass,Bypass, Cardiopulmonary,Bypass, Heart-Lung,Bypasses, Cardiopulmonary,Bypasses, Heart-Lung,Cardiopulmonary Bypasses,Heart Lung Bypass,Heart-Lung Bypasses
D002478	Cells, Cultured	Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.	Cultured Cells,Cell, Cultured,Cultured Cell
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D003602	Cytotoxicity, Immunologic	The phenomenon of target cell destruction by immunologically active effector cells. It may be brought about directly by sensitized T-lymphocytes or by lymphoid or myeloid "killer" cells, or it may be mediated by cytotoxic antibody, cytotoxic factor released by lymphoid cells, or complement.	Tumoricidal Activity, Immunologic,Immunologic Cytotoxicity,Immunologic Tumoricidal Activities,Immunologic Tumoricidal Activity,Tumoricidal Activities, Immunologic
D005260	Female		Females
D006348	Cardiac Surgical Procedures	Surgery performed on the heart.	Cardiac Surgical Procedure,Heart Surgical Procedure,Heart Surgical Procedures,Procedure, Cardiac Surgical,Procedure, Heart Surgical,Procedures, Cardiac Surgical,Procedures, Heart Surgical,Surgical Procedure, Cardiac,Surgical Procedure, Heart,Surgical Procedures, Cardiac,Surgical Procedures, Heart