Growth stimulating activity of heat shock protein 90α to lymphoid cell lines in serum-free medium

Toshihiro Kuroita, Hirofumi Tachibana, Hideya Ohashi, Sanetaka Shirahata, Hiroki Murakami

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


A growth stimulating factor was purified from the culture supernatant of human-human hybridoma SH-76 cells in serum-free RPMI 1640 medium by the serial use of DEAE anion and heparin affinity chromatographies. The factor was a 85 kDa protein on SDS-polyacrylamide gel electrophoresis. N-terminal amino acid sequence (PEETQTQDQPME) of the protein was coincident with that of heat shock protein 90α (HSP90α). The protein reacted with anti-HSP90 monoclonal antibody. These results suggest that the protein was a member of HSP90α family after taking other circumstantial evidence into account. The protein stimulated the growth of some lymphoid cell lines such as human B-lymphoblastoid cell line HO-323-3 hybridomas derived from HO-323, and several other lymphoid cell lines. There were several lymphoid cell lines which did not respond to the protein. Growth stimulating activity of the protein was heat-unstable and significantly decreased at above 60°C. These are the first data that describe growth-stimulating activity of heat shock protein 90α.

Original languageEnglish
Pages (from-to)109-117
Number of pages9
Issue number2
Publication statusPublished - Jun 1992

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Biomedical Engineering
  • Clinical Biochemistry
  • Cell Biology


Dive into the research topics of 'Growth stimulating activity of heat shock protein 90α to lymphoid cell lines in serum-free medium'. Together they form a unique fingerprint.

Cite this