Publications by authors named "Ke-Yao Dai"

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The immunosuppressive effects of low molecular weight chitosan on thymopentin-activated mice bearing H22 solid tumors.

Int Immunopharmacol 2021 Oct 27;99:108008. Epub 2021 Jul 27.

College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China. Electronic address:

In the present study, the low molecular weight of chitosan (CS) was prepared and its activity on thymopentin-activated mice bearing H22 solid tumors was further researched. The purity and molecular weight of CS were determined by UV and HPGPC spectra, and its immunosuppressive effects on H22 tumor-bearing mice were evaluated through determination on immune organs, cells and cytokines. Results showed that CS contained little impurities with the average molecular weight of 1.20 × 10 Da. The in vivo antitumor experiments demonstrated that CS facilitated to destroy immune organs (thymuses and spleens), suppress immune cells (lymphocytes, macrophages and NK cells) activities and reduce immune-related cytokines (TNF-α, IFN-γ, IL-2 and IL-4) expressions of H22 tumor-bearing mice even with simultaneous TP5 stimulation. Our data suggested that CS could not be applied to improve immune response in cancer-bearing patients, but might be employed for treatments on autoimmune diseases or organ transplant patients.
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October 2021