SJSZ Glycoprotein (38 kDa) Inhibits Cell Cycle and Oxidative Stress in N-Methyl-N`- nitro-N-nitrosoguanidine-induced ICR Mice

ISSN: 1875-5992 (Online)
ISSN: 1871-5206 (Print)

Volume 16, 12 Issues, 2016

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Anti-Cancer Agents in Medicinal Chemistry

Formerly: Current Medicinal Chemistry - Anti-Cancer Agents

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Michelle Prudhomme
Universite Blaise Pascal - C.N.R.S
Aubiere Cedex

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SJSZ Glycoprotein (38 kDa) Inhibits Cell Cycle and Oxidative Stress in N-Methyl-N`- nitro-N-nitrosoguanidine-induced ICR Mice

Anti-Cancer Agents in Medicinal Chemistry, 13(4): 647-653.

Author(s): Jin Lee and Kye-Taek Lim.

Affiliation: Molecular Biochemistry Laboratory, Bioenergy Research Center, Chonnam National University, 300 Yongbong-Dong, Gwang-ju 500-757, South Korea.


The initiation stage of liver cancer is closely related to abnormal cell proliferation as observed for other types of carcinogenesis. Recently, we isolated a glycoprotein from Styrax japonica Siebold et al Zuccarini (SJSZ glycoprotein), which consists of a carbohydrate moiety (52.64%) and a protein moiety (47.36%). In this study, the antitumoric mechanism of SJSZ glycoprotein during the initiation stage in N-Methyl-N`-nitro-N-nitrosoguanidine (MNNG; 40 mg/kg, BW)-induced ICR was investigated. First, we evaluated the activities of lactate dehydrogenase (LDH), alanine aminotransferase (ALT), thiobarbituric acid-reactive substances (TBARS), and activities of antioxidative enzymes [superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT)] in mouse liver tissue and serum. The alpha-fetoprotein (AFP), cell cycle-related factors [cyclin D1/ cyclin dependent kinase (CDK) 4], cell cycle inhibitors (CKIs; p53, p21, and p27), and proliferating cell nuclear antigen (PCNA) were then assessed using Western Blot analysis. The results of this analysis showed that the SJSZ glycoprotein (10 mg/kg, BW) decreased the levels of LDH, ALT, TBARS, and the expression of AFP but it increased the activity of hepatic anti-oxidant enzymes (SOD, GPx and CAT). In addition, the SJSZ glycoprotein (10 mg/kg, BW)was shown to decrease the expression of cyclin D1/CDK4 and PCNA and increase the expression of CKIs (p53, p21, and p27). The results in this study indicate that the SJSZ glycoprotein displays anti-oxidative stress and anti-cell proliferation activity in MNNGinduced ICR.


SJSZ glycoprotein (38 kDa), CDK4/cyclin D1, CKIs, PCNA.

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Article Details

Volume: 13
Issue Number: 4
First Page: 647
Last Page: 653
Page Count: 7
DOI: 10.2174/1871520611313040013
Price: $58

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