Human umbilical cord mesenchymal stem cells suppress breast cancer tumourigenesis through direct cell-cell contact and internalization.
Bottom Line: Also, treatment with HUMSC injection was efficacious in both in situ and metastatic breast cancers in the animal models.Since HUMSCs were proved to efficaciously suppress breast cancer tumourigenesis both in vitro and in vivo, it is our expectation that treatment with HUMSCs can be a viable therapy for breast cancer in the near future.In addition, we share a new point of view on the role of HUMSCs in foetal development during pregnancy.
Affiliation: Genomics Research Center, Academia Sinica, Taipei, Taiwan.Show MeSH
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Mentions: Compared with breast cancer control group (n = 7), tumour cells in HUMSC treatment group (n = 7) were sparse and loose, with condensation of nuclei noted on haematoxylin and eosin staining. Very few cells with positive KI-67 (a cellular marker for proliferation) staining but lots of cells with positive cleaved-caspase-3 staining were found within the tumour nodule in HUMSC treatment group (Fig. 5A). In breast cancer control group, the KI-67 positive staining rate was 51.21 ± 1.72%, and the cleaved-caspase-3 positive staining rate was 0 ± 0% under high power field of the tumour nodule. However, in HUMSC treatment group, the KI-67 positive staining rate was 10.47 ± 1.61%, while the cleaved-caspase-3 positive staining rate was 75.04 ± 4.65% under high power field of the tumour nodule (Fig. 5B). These findings demonstrate that the tumour cells were no longer largely proliferating and growing, and most of them went into apoptosis following HUMSC treatment.
Affiliation: Genomics Research Center, Academia Sinica, Taipei, Taiwan.