Abstract
Platostoma palustre jelly is a traditional food. Platostoma palustre has been used as folk medicine and is effective against heat-shock, hypertension and diabetes. Therefore, the aim of this study was to determine the effects of ethanolic extracts and commercial herbal tea of Platostoma palustre in inhibiting colorectal cancer cell viability. The ethanolic extracts of Platostoma palustre by using 90% ethanol for extraction. In this study, 2-fold serial dilution of 100 mg/mL Platostoma palustre extracts were applied. On other hand, the same dilution fold was also performed for 100% commercial herbal tea with Platostoma palustre. Additionally, CT-26 and HT-29 colorectal cancer cell lines were also used in this study. After co-culturing for 24 hours, the cell viability of CT-26 and HT-29 colorectal cancer cell lines were performed by using 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay. According to these data, the 1.56-100 mg/mL Platostoma palustre extracts possessed the significant inhibition effects of CT-26 colorectal cancer cell viability. The 3.13-100% commercial herbal tea with Platostoma palustre possessed the significant inhibition effects of CT-26 colorectal cancer cell viability. The 6.25-100 mg/mL Platostoma palustre extracts possessed the significant inhibition effects of HT-29 colorectal cancer cell viability. The 25-100% commercial herbal tea with Platostoma palustre possessed the significant inhibition effects of HT-29 colorectal cancer cell viability. However, the 0.39-3.13 mg/mL Platostoma palustre extracts possessed the significant promoting effects of HT-29 colorectal cancer cell viability. The 0.39-12.5% commercial herbal tea with Platostoma palustre also possessed the significant promoting effects of HT-29 colorectal cancer cell viability. Comparison of CT-26 and HT-29 cell lines was on the cell viability after Platostoma palustre ethanolic extracts and commercial herbal tea treatments, CT-26 cell line was better sensitive than HT-29 cell line on the inhibition of cell viability after treatment of Platostoma palustre ethanolic extracts and the commercial herbal tea. Taken these results together, Platostoma palustre ethanolic extracts and commercial herbal tea may have a potential for inhibiting the growth of colorectal cancer cells.
Highlights
The aim of this study was to determine the effects of ethanolic extracts and commercial herbal tea of Platostoma palustre in inhibiting colorectal cancer cell viability
Comparison of CT-26 and HT-29 cell lines was on the cell viability after Platostoma palustre ethanolic extracts and commercial herbal tea treatments, CT-26 cell line was better sensitive than HT-29 cell line on the inhibition of cell viability after treatment of Platostoma palustre ethanolic extracts and the commercial herbal tea
Platostoma palustre ethanolic extracts and commercial herbal tea may have a potential for inhibiting the growth of colorectal cancer cells
Summary
Cancer is a major public health problem worldwide. The top 10 cancer types for estimated deaths in Taiwan in 2020 were in order as lung cancer, liver cancer, colorectal cancer, breast cancer (female), prostate cancer, oral cavity cancer, pancreatic cancer, stomach cancer, esophageal cancer, and ovarian cancer. Platostoma palustre is an annual plant that is mainly distributed in tropical and subtropical regions, including Taiwan, Indonesia, Vietnam, southern China, and Burma [4-6]. The heated herbal jelly with Platostoma palustre is admired by many Taiwanese in winter. Platostoma palustre has been verified that possessed many functional compounds such as polysaccharides (gum) with a unique aroma and texture, sterol compounds, stigmasterol, α-sitosterol, tripterpene compounds, oleanolic acid, volatile compounds (caryophyllene oxide, α-caryophyllene, eugenol, benzene acetaldehyde, and 2,3-butanedione etc), essential oil (n-hexadecanoic acid, linoleic acid, and linolenic acid), volatile oil (chavibetol, n-hexadecanoic acid, and α-cadinol), and ursolic acid [4-8]. Theses functional compounds of Platostoma palustre have indicated that many biological effects is effective against and attenuating the metabolic syndrome, heat-shock, hypertension, diabetes, liver disease, muscle and/or joint pains, hyperglycemia, inflammation, oxidant activity, free radical scavenging effects, acute and chronic hepatitis, and caner growth [9-12]
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