title: Apoptotic properties of polysaccharide isolated from fruiting bodies of medicinal mushroom Fomes fomentarius in human lung carcinoma cell line.
abstract: Mushrooms are known to complement chemotherapy and radiation therapy by countering the side effects of cancer. Recently, there has been great interest in isolation of novel bioactive compounds from mushrooms due to their numerous health beneficial effects. Chemically water-extractable polysaccharide (MFKF-AP1β), with a molecular weight of 12 kDa, was isolated from fruiting bodies of mushroom Fomes fomentarius. In this research, we investigated the anti-tumor effects of MFKF-AP1β on human lung carcinoma A549 cells. Results showed that MFKF-AP1β markedly inhibited A549 cell growth in a dose-dependent manner based on the amount of lactate dehydrogenase (LDH) released and morphological alterations. In addition, MFKF-AP1β induced cellular apoptosis by causing single-stranded DNA breakage, as evidenced by apoptosis assay. Furthermore, MFKF-AP1β (25-100 μg/ml) significantly induced single-stranded DNA breakage in A549 cells, as shown by comet assay. Taken together, our results demonstrate that MFKF-AP1β has strong anti-tumor effects mediated through induction of apoptosis. Therefore, MFKF-AP1β could be useful in lung chemotherapy.
authors.affiliation: Department of Biology Education, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea.
authors.forename: Sang Ho
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea.
authors.forename: Rekha
authors.initials: R
authors.lastname: Jakhar
authors.affiliation: Department of Biotechnology, Daegu University, Kyoungsan, Kyoungbook 712-714, Republic of Korea.
authors.forename: Sun Chul
authors.initials: SC
authors.lastname: Kang
keywords: Anti-apoptosis; Anti-oxidant; Comet assay; DNA binding; DNA damage