Premium
Deficient natural killer (NK) cells in paroxysmal nocturnal haemoglobinuria (PNH): studies of lymphoid cells fractionated by discontinuous density gradient centrifugation
Author(s) -
Y oda Yasuhiro,
Abe Tsukasa
Publication year - 1985
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1111/j.1365-2141.1985.tb07471.x
Subject(s) - immunology , biology
S ummary Non‐adherent, non‐B lymphoid cells from six patients with PNH and six healthy subjects were fractionated by Percoll discontinuous density gradient centrifugation (DDGC). The cell distribution pattern, NK cell activity (NKA), large granular lymphocytes (LGL) count and surface marker phenotypes were studied. The distribution patterns of patients’cells did not significantly differ from the controls. The peak of the NKA was found in low density fractions where the maximum counts of LGL, Leu‐7 + 2 ‐ cells and Leu‐11 + cells were present. The NKA and the proportion of Leu‐7 + 2 ‐ cells and Leu‐11 + cells were significantly lower in patients with PNH ( P <0.001 for NKA and surface phenotypes; P <0.02 for LGL counts). NKA in the Percoll fractions was correlated with the counts of LGL ( r = 0.69, P <0.001), Leu‐7 + 2 ‐ cells ( r = 0.75, P <0.001) and Leu‐11 + cells ( r = 0.89, P <0.001). Therefore, we concluded that NKA is deficient in PNH because of decreased NK cell counts.