当前位置： SCI文献检索 > INTERNATIONAL IMMUNOPHARMACOLOGY期刊下所有文献 > Baccatin III, a precursor for the semisynthesis of paclitaxel, inhibits the accumulation and suppressive activity of myeloid-derived suppressor cells in tumor-bearing mice.

Baccatin III, a precursor for the semisynthesis of paclitaxel, inhibits the accumulation and suppressive activity of myeloid-derived suppressor cells in tumor-bearing mice.

Abstract：

:Myeloid-derived suppressor cells (MDSCs) mediate tumor-associated immune suppression in both cancer patients and tumor-bearing animals. Reduction or elimination of MDSCs reduces the rate of tumor progression and improves cancer therapies that employ mechanisms of immunity. Here we show that baccatin III, which is the precursor for the semisynthesis of paclitaxel, exerts anti-tumor immunomodulatory activity in very low doses (0.05-0.5mg/kg), although it is regarded as an inactive derivative of paclitaxel. Oral administration of baccatin III significantly reduced the growth of tumors induced by engrafting BALB/c mice with either 4 T1 mammary carcinoma or CT26 colon cancer cells. Baccatin III (0.5mg/kg) did not exert anti-tumor activity in athymic nude mice. Baccatin III decreased the accumulation of MDSCs in the spleens of the tumor-bearing mice. Furthermore, MDSCs isolated from baccatin III-treated mice, compared with those isolated from vehicle-treated mice, had a significantly reduced suppressive effect on T cells treated with the anti-CD3 and anti-CD28 monoclonal antibodies. Moreover, these cells produced significantly reduced amounts of reactive oxygen species and nitric oxide. These results suggest that baccatin III reduced tumor progression by inhibiting the accumulation and suppressive function of MDSCs.

journal_name

Int Immunopharmacol

journal_title

International immunopharmacology

authors

Lee YH,Lee YR,Park CS,Im SA,Song S,Hong JT,Whang BY,Kim K,Lee CK

doi

10.1016/j.intimp.2014.06.012

subject

Has Abstract

pub_date

2014-08-01 00:00:00

pages

487-93

issue

2

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(14)00226-4

journal_volume

21

pub_type

杂志文章

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