Open AccessInhibitory effect of triptolide on lymph node metastasis in patients with non‐Hodgkin lymphoma by regulating SDF‐1/CXCR4 axis in vitro 1
Author(s) -
ZHANG Chun,
CUI Guohui,
LIU Fang,
WU Qiuling,
CHEN Yan
Publication year - 2006
Publication title -
acta pharmacologica sinica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.514
H-Index - 90
eISSN - 1745-7254
pISSN - 1671-4083
DOI - 10.1111/j.1745-7254.2006.00415.x
Subject(s) - triptolide , lymphoma , stromal cell , flow cytometry , cancer research , lymph , lymph node , in vitro , microbiology and biotechnology , cell culture , raji cell , medicine , immunology , chemistry , biology , pathology , apoptosis , biochemistry , genetics
Aim: To investigate the antiproliferative effect of triptolide on B‐NHL cell line Raji cells, to study its effect on lymph node metastasis in patients with non‐Hodgkin's lymphoma (NHL) in vitro , and to explore the underlying mechanism regulating SDF‐1/CXCR4 axis. Methods: The effects of triptolide on the growth of Raji cells were studied by 3‐(4,5‐dimethyl‐2‐thiazolyl)‐2,5‐diphenyl‐2 H ‐tetrazolium (MTT) assay. The effects of triptolide on SDF‐1 mRNA expression in lymph node stromal cells from patients with NHL were determined by reverse transcriptase‐polymerase chain reaction (RT‐PCR). The effects of triptolide on CXCR4 expression on lymphoma cells freshly isolated from the lymph nodes of these patients were studied by flow cytometric analysis. Chemotaxis assays were performed to observe the effects of triptolide on migration of primary lymphoma cells towards recombinant human SDF‐1α (rhSDF‐1α) or cultured lymph node stromal cells in vitro. Results: Triptolide inhibited the proliferation of B‐NHL cell line Raji cells in a dose‐ and time‐dependent manner with a 24‐h IC 50 value of 43.06 nmol/L and a 36‐h IC 50 value of 25.08 nmol/L. The expression of SDF‐1α mRNA in lymph node stromal cells obtained from patients with NHL was decreased after treatment by triptolide at concentrations of 25 and 50 nmol/L for 24 h. Flow cytometry analysis showed that the CXCR4 expression on primary lymphoma cells were downregulated gradually in a dose‐dependent manner following triptolide treatment. Chemotaxis assays revealed that the migration of freshly isolated lymphoma cells towards either rhSDF‐1 or cultured lymph node stromal cells was markedly inhibited by the addition of triptolide in vitro , and the inhibition was dose‐dependent. Conclusion: Triptolide can inhibit the proliferation of B‐NHL cell line Raji cells. Moreover, triptolide is able to inhibit the migration of lymphoma cells via lymph nodes in vitro. The potential antitumor mechanisms of triptolide are related to the antiproliferative effect and the blockage of SDF‐1/CXCR4 axis.