Luteolin inhibits angiogenesis of the M2‑like TAMs via the downregulation of hypoxia inducible factor‑1α and the STAT3 signalling pathway under hypoxia

Molecular Medicine Reports
Binbo FangBicheng Chen

Abstract

The imbalance between angiogenic inducers and inhibitors appears to be a critical factor in tumour pathogenesis. Angiogenesis serves a key role in the occurrence, invasion and metastasis of tumours. Macrophages are a major cellular component of human and rodent tumours, where they are usually termed tumour‑associated macrophages (TAMs). In malignant tumours, TAMs tend to resemble alternatively activated macrophages (M2‑like), promote TA angiogenesis, strengthen tumour migration and invasive abilities, and simultaneously inhibit antitumor immune responses. In our previous study, luteolin, commonly found in a wide variety of plants, had a strong antitumor effect under normoxia; however, it is unknown whether luteolin serves a similar role under hypoxia. In the present study, cobalt chloride (CoCl2) was used to simulate hypoxia. Hypoxia‑inducible factor‑1α (HIF‑1α), which is difficult to detect under normoxic conditions, was significantly increased. Additionally, vascular endothelial growth factor (VEGF) was also significantly increased in response to CoCl2 treatment. Subsequently, luteolin was applied with CoCl2 to examine the effects of luteolin. Luteolin decreased the expression of VEGF and matrix metalloproteinase‑9, which pro...Continue Reading

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Citations

May 31, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Meenakshi Sudhakaran, Andrea I Doseff
Jan 7, 2021·Cancers·Marek SamecPeter Kubatka
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Luis Gustavo Saboia PonteFernando Moreira Simabuco

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