Cutting Edge: Elevated Leptin during Diet-Induced Obesity Reduces the Efficacy of Tumor Immunotherapy.

Cutting Edge: Elevated Leptin during Diet-Induced Obesity Reduces the Efficacy of Tumor Immunotherapy.
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DOI:
10.4049/jimmunol.1701738
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发表时间:
2018-10-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Griffith TS
Griffith TS
中科院分区:
其他
文献类型:
--
作者:
Murphy KA;James BR;Sjaastad FV;Kucaba TA;Kim H;Brincks EL;Chua SC Jr;Wilber A;Griffith TS

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Various malignancies are reproducibly cured in mouse models, but most cancer immunotherapies show objective responses in a fraction of treated patients. One reason for this disconnect may be the use of young, lean mice lacking immune altering co-morbidities present in cancer patients. While many cancer patients are overweight or obese, the effect of obesity on antitumor immunity is understudied in preclinical tumor models. We examined the effect of obesity on two immunotherapeutic models: systemic anti-CTLA-4 mAb and intratumoral delivery of a TRAIL-encoding adenovirus plus CpG. Both therapies were effective in lean mice, but neither provided a survival benefit to diet-induced obese (DIO) BALB/c mice. Interestingly, tumor-bearing leptin deficient (ob/ob) obese BALB/c mice did respond to treatment. Moreover, reducing systemic leptin with soluble leptin receptor:Fc restored the antitumor response in DIO mice. These data demonstrate the potential of targeting leptin to improve tumor immunotherapy when immune modulating co-morbidities are present.
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