Protease activity of normal and PHA stimulated human lymphocytes

Arthur I. Grayzel, Victor Bernard Hatcher, Gerald S. Lazarus

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

An assay measuring the release of TCA soluble radioactive peptides from 3H acetylated casein or hemoglobin has been used to demonstrate that human peripheral blood lymphocytes contain a number of proteases, including cathepsin D, a neutral serine protease(s) inhibited by DFP and TLCK and probably a thiol protease(s) as well. We have also found a neutral protease activity bound to the surface of the lymphocyte, but not secreted into the medium which is not inhibited by TLCK. TLCK inhibits blast transformation to PHA under conditions that do not profoundly affect protein synthesis and inhibits the total extractable proteolytic activity of lymphocytes by approximately 25%. Lymphocytes contain one or more proteases that may play a role in blast transformation and other lymphocyte functions.

Original languageEnglish (US)
Pages (from-to)210-219
Number of pages10
JournalCellular Immunology
Volume18
Issue number1
DOIs
StatePublished - 1975

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Tosyllysine Chloromethyl Ketone
Peptide Hydrolases
Lymphocytes
Lymphocyte Activation
Isoflurophate
Cathepsin D
Serine Proteases
Caseins
Sulfhydryl Compounds
Hemoglobins
Peptides
Proteins

ASJC Scopus subject areas

  • Cell Biology
  • Immunology

Cite this

Protease activity of normal and PHA stimulated human lymphocytes. / Grayzel, Arthur I.; Hatcher, Victor Bernard; Lazarus, Gerald S.

In: Cellular Immunology, Vol. 18, No. 1, 1975, p. 210-219.

Research output: Contribution to journalArticle

Grayzel, Arthur I. ; Hatcher, Victor Bernard ; Lazarus, Gerald S. / Protease activity of normal and PHA stimulated human lymphocytes. In: Cellular Immunology. 1975 ; Vol. 18, No. 1. pp. 210-219.
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