RESUMO
The present study investigated how abnormal expression of hyaluronan-mediated mobility receptor (HMMR) in renal cell carcinoma (RCC) tissue affects the growth of RCC cells and the association between expression of HMMR and pathological staging and prognosis of patients with RCC. Reverse transcription-quantitative PCR was used to measure the expression of HMMR mRNA in RCC tissue and cell lines. For the prediction of HMMR gene expression, The Cancer Genome Atlas online database was utilized to compare differential gene expression of HMMR in normal renal and RCC tissue. Cell Counting Kit-8 assay was used to examine cell proliferation. The expression of HMMR increased in RCC tissue and renal cancer cell lines. The expression of HMMR was an independent prognostic factor for 5-year and disease-free survival in patients with RCC. The silencing of HMMR expression decreased the expression of Cyclin B1 and inhibited the proliferation of RCC cells. Overexpression of HMMR promoted the expression of Cyclin B1 and cell proliferation. The present study demonstrated that the expression of HMMR was significantly upregulated in RCC and was an independent prognostic factor for RCC. HMMR may be involved in the occurrence of RCC by regulating Cyclin B1.
RESUMO
The antitumor function of fungal polysaccharides is a popular area of interest in the research field due to their high efficiency and low side effects. The main mechanism of fungal polysaccharides is immune enhancement. The polysaccharose (APS-3) was extracted from the fruit body of Phellinus pullus. The proliferation inhibition to mouse sarcoma 180 (S180) tumor cells was studied by the MTT method. Mice models of transplanted S180 tumor were established and treated with APS-3 to verify the antitumor activity in vivo. Natural killer (NK) and lymphokine-activated killer (LAK) cytotoxicities of the mice were evaluated by the lactate dehydrogenase method. APS-3 can significantly inhibit the proliferation of the S180 cells. Cells could be completely inhibited by 1.6 mg/ml APS-3 after 24 h treatment. After 18 days of treatment, the antitumor rate of the high-dose group was 85.47%. Histopathology detection showed that for the APS-3-treated mice, the tumor cells dissolved, and exhibited a large range of structureless necrotic areas. NK and LAK cytotoxicities of the APS-3 treated mice increased by 61.85 and 56.16%, respectively, compared with the normal control mice. APS-3 can be used as an antitumor agent by way of immune enhancement.