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Song B, Shen X, Tong C, Zhang S, Chen Q, Li Y, Li S. Gossypin: A flavonoid with diverse pharmacological effects. Chem Biol Drug Des 2023; 101:131-137. [PMID: 36198093 DOI: 10.1111/cbdd.14152] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/26/2022] [Accepted: 09/30/2022] [Indexed: 12/15/2022]
Abstract
Gossypin is a flavonoid compound prepared from chinese medicine Hibiscus, which not only has significant pharmacological activities in antioxidant, anti-inflammatory, neuroprotective, anti-cancer, anti-tumor, and anti-diabetic aspects, but also has the advantages of small side effects and easy preparation because it is extracted from traditional chinese medicine, so it has received widespread attention from scholars and researchers. This paper reviews the pharmacological effects and mechanisms of gossypin in recent years, and hopes to provide a theoretical basis for its clinical application.
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Affiliation(s)
- Bocui Song
- Department of Pharmaceutical Engineering, College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Xue Shen
- Molecular Mechanism of Disease & Research and Development of Bioactive Substances, College of Life Science & Technology, Heilongjiang Bayi Agricultura University, Daqing, China
| | - Chunyu Tong
- Department of Biological Science, College of Life Science & Technology, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Shuang Zhang
- Animal Husbandry and Veterinary Station of Yongji Economic Development Zone, Jilin, China
| | - Qian Chen
- Molecular Mechanism of Disease & Research and Development of Bioactive Substances, College of Life Science & Technology, Heilongjiang Bayi Agricultura University, Daqing, China
| | - Yuqi Li
- Molecular Mechanism of Disease & Research and Development of Bioactive Substances, College of Life Science & Technology, Heilongjiang Bayi Agricultura University, Daqing, China
| | - Shuang Li
- Molecular Mechanism of Disease & Research and Development of Bioactive Substances, College of Life Science & Technology, Heilongjiang Bayi Agricultura University, Daqing, China
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DİRİCAN E, ÇINAR İ. Gossypin'in farklı kanser hücre dizilerinde HSP60 ve HSP70'in gen ekspresyonu üzerindeki etkisi. CUKUROVA MEDICAL JOURNAL 2022. [DOI: 10.17826/cumj.1052787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Amaç: Bu çalışmanın amacı, gossypin'in farklı kanser hücre hatlarında ısı şok proteinleri (HSP) genlerinin ekspresyon seviyesi üzerindeki etkisini incelemektir.
Gereç ve Yöntem: Hücreler, standart kültür koşulları altında büyütüldü. Kanser hücreleri, farklı konsantrasyonlarda (5-100 µg/ml) gossypin ve pozitif kontrol olarak sisplatin (50 µM) ile muamele edildi. Gossypin'in hücre canlılığı ve etkili doz aralığı (5-100 µg/ml), 24, 48 ve 72. saatlerde MTT ile belirlendi. RNA izolasyonu ve cDNA sentezinden sonra, HSP60 ve HSP70 gen ekpresyon seviyesi RT-PCR ile analiz edildi. Gen ekspresyonu için 2-∆∆ct methodu kullanıldı.
Bulgular: MTT sonuçlarına göre kanser hücre hatlarında 25-50-100 µg/ml gossipin dozlarının HSP60 ve HSP70 gen ekspresyon seviyeleri üzerinde etkili olduğu bulundu. Gossypin, üç hücre hattında HSP60 ve HSP70'in ekspresyonunu doza bağımlı olarak etkilemiştir. Üç hücre hattında, 50 µg/ml ve 100 µg/ml gossipin dozları, HSP60 ve HSP70'in ekspresyonunu kontrol grubuna kıyasla önemli ölçüde azalttı.
Sonuç: Sonuçlarımız, farklı hücre dizilerinde çeşitli dozlarda gossypinin antikarsinojenik etkisini güçlü bir şekilde desteklemektedir. Fakat, daha fazla in vivo araştırma ve insan çalışmalarına ihtiyaç olduğuna inanıyoruz. Bulgularımız, gossypin'nin farklı kanser türlerinin önlenmesi ve/veya tedavisi için yeni stratejiler geliştirmek için daha ileri araştırmalar için uygun aday ajan olabileceğini düşündürmektedir.
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Affiliation(s)
- Ebubekir DİRİCAN
- BAYBURT ÜNİVERSİTESİ, BAYBURT SAĞLIK HİZMETLERİ MESLEK YÜKSEKOKULU
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Maleki Dana P, Sadoughi F, Mirzaei H, Asemi Z, Yousefi B. DNA damage response and repair in the development and treatment of brain tumors. Eur J Pharmacol 2022; 924:174957. [DOI: 10.1016/j.ejphar.2022.174957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 04/03/2022] [Accepted: 04/11/2022] [Indexed: 11/03/2022]
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Khotimchenko R, Bryukhovetskiy I, Khotimchenko M, Khotimchenko Y. Bioactive Compounds with Antiglioma Activity from Marine Species. Biomedicines 2021; 9:biomedicines9080886. [PMID: 34440090 PMCID: PMC8389718 DOI: 10.3390/biomedicines9080886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/20/2021] [Accepted: 07/21/2021] [Indexed: 11/21/2022] Open
Abstract
The search for new chemical compounds with antitumor pharmacological activity is a necessary process for creating more effective drugs for each specific malignancy type. This review presents the outcomes of screening studies of natural compounds with high anti-glioma activity. Despite significant advances in cancer therapy, there are still some tumors currently considered completely incurable including brain gliomas. This review covers the main problems of the glioma chemotherapy including drug resistance, side effects of common anti-glioma drugs, and genetic diversity of brain tumors. The main emphasis is made on the characterization of natural compounds isolated from marine organisms because taxonomic diversity of organisms in seawaters significantly exceeds that of terrestrial species. Thus, we should expect greater chemical diversity of marine compounds and greater likelihood of finding effective molecules with antiglioma activity. The review covers at least 15 classes of organic compounds with their chemical formulas provided as well as semi-inhibitory concentrations, mechanisms of action, and pharmacokinetic profiles. In conclusion, the analysis of the taxonomic diversity of marine species containing bioactives with antiglioma activity is performed noting cytotoxicity indicators and to the tumor cells in comparison with similar indicators of antitumor agents approved for clinical use as antiglioblastoma chemotherapeutics.
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Affiliation(s)
- Rodion Khotimchenko
- School of Biomedicine, Far Eastern Federal University, 690090 Vladivostok, Russia; (R.K.); (I.B.); (M.K.)
| | - Igor Bryukhovetskiy
- School of Biomedicine, Far Eastern Federal University, 690090 Vladivostok, Russia; (R.K.); (I.B.); (M.K.)
| | - Maksim Khotimchenko
- School of Biomedicine, Far Eastern Federal University, 690090 Vladivostok, Russia; (R.K.); (I.B.); (M.K.)
| | - Yuri Khotimchenko
- School of Biomedicine, Far Eastern Federal University, 690090 Vladivostok, Russia; (R.K.); (I.B.); (M.K.)
- Laboratory of Pharmacology, A. V. Zhirmunsky National Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, 690950 Vladivostok, Russia
- Correspondence:
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ÇINAR İ, YAYLA M, BİNNETOĞLU D. Gossypinin insan hepatom (Hep-3B) hücreleri üzerinde anti-proliferatif etkisi. CUKUROVA MEDICAL JOURNAL 2020. [DOI: 10.17826/cumj.732912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Abstract
Flavonoids are tricyclic polyphenolic compounds naturally occurring in plants. Being nature’s antioxidants flavonoids have been shown to reduce the damages induced by oxidative stress in cells. Besides being an antioxidant, flavonols are demonstrated to have anti-infective properties, i.e., antiviral, antifungal, anti-angiogenic, anti-tumorigenic, and immunomodulatory bioproperties. Plants use them as one of their defense mechanisms against radiation-induced DNA damage and also for fungal infections. The use of flavonols for fabrication of new drugs has been underway with objectives to develop safer and effective therapeutic agents. This review covers 15 flavonols for their structure, biological properties, role in plant metabolisms, and current research focused on computational drug design using flavonols for searching drug leads.
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Yan Z, Guo F, Yuan Q, Shao Y, Zhang Y, Wang H, Hao S, Du X. Endometrial mesenchymal stem cells isolated from menstrual blood repaired epirubicin-induced damage to human ovarian granulosa cells by inhibiting the expression of Gadd45b in cell cycle pathway. Stem Cell Res Ther 2019; 10:4. [PMID: 30606243 PMCID: PMC6318935 DOI: 10.1186/s13287-018-1101-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/29/2018] [Accepted: 12/05/2018] [Indexed: 01/01/2023] Open
Abstract
Background To explore the effect of mesenchymal stem cells isolated from menstrual blood (MB-MSCs) on epirubicin-induced damage to human ovarian granulosa cells (GCs) and its potential mechanisms. Methods The estradiol, progesterone, anti-Müllerian hormone, inhibin A, and inhibin B levels were determined using enzyme-linked immunosorbent assay. The proliferation of GCs was detected by Cell Counting Kit-8 assays. The cell cycle distribution was detected by propidiumiodide single staining. The apoptosis of GCs was determined using Annexin V and 7-AAD double staining. The differentially expressed genes of GCs were analyzed with Affymetrix Human Transcriptome Array 2.0 gene chip and verified with Western blot analysis. Results Epirubicin inhibited the secretion of estradiol, progesterone, anti-Müllerian hormone, inhibin A, and inhibin B and the proliferation of GCs; arrested these GCs in G2/M phase; and promoted the apoptosis of GCs. However, MB-MSCs repaired epirubicin-induced damage to GCs. Differentially expressed genes of GCs, Gadd45b, CyclinB1, and CDC2, were found by microarray and bioinformatics analysis. Western blot showed that epirubicin upregulated Gadd45b protein expression and downregulated CyclinB1 and CDC2 protein expression, while MB-MSCs downregulated Gadd45b protein expression and upregulated CyclinB1 and CDC2 protein expression. Conclusions MB-MSCs repaired epirubicin-induced damage to GCs, which might be related to the inhibition of Gadd45b protein expression.
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Affiliation(s)
- Zhongrui Yan
- Department of Obstetrics & Gynecology, General Hospital, Tianjin Medical University, NO.154, Anshan Road, Heping District, Tianjin, 300052, China
| | - Fengyi Guo
- Department of Obstetrics & Gynecology, General Hospital, Tianjin Medical University, NO.154, Anshan Road, Heping District, Tianjin, 300052, China
| | - Qing Yuan
- Maternal and Child Health Care Hospital of Shandong Province, NO.238, Jingshi Road, Jinanlixia District, Jinan, 250014, China
| | - Yu Shao
- Maternal and Child Health Hospital of Guiyang City, NO.63, Ruijin south Road, Nanming District, Guiyang City, 550003, Guizhou Province, China
| | - Yedan Zhang
- Department of Obstetrics & Gynecology, General Hospital, Tianjin Medical University, NO.154, Anshan Road, Heping District, Tianjin, 300052, China
| | - Huiyan Wang
- Reproductive Medical Center, Tianjin Central Hospital of Gynecology Obstetrics, NO.156, Nankai Sanma Road, Nankai District, Tianjin, 300010, China
| | - Shaohua Hao
- Department of Obstetrics & Gynecology, General Hospital, Tianjin Medical University, NO.154, Anshan Road, Heping District, Tianjin, 300052, China
| | - Xue Du
- Department of Obstetrics & Gynecology, General Hospital, Tianjin Medical University, NO.154, Anshan Road, Heping District, Tianjin, 300052, China.
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Wang L, Wang X, Chen H, Zu X, Ma F, Liu K, Bode AM, Dong Z, Kim DJ. Gossypin inhibits gastric cancer growth by direct targeting of AURKA and RSK2. Phytother Res 2018; 33:640-650. [PMID: 30536456 DOI: 10.1002/ptr.6253] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/11/2018] [Accepted: 11/15/2018] [Indexed: 12/13/2022]
Abstract
Gossypin is a flavone extracted from Hibiscus vitifolius, which has been reported to exhibit anti-inflammatory, antioxidant, and anticancer activities. However, the anticancer properties of gossypin and its molecular mechanism of action against gastric cancer have not been fully investigated. In the present study, we report that gossypin is an Aurora kinase A (AURKA) and RSK2 inhibitor that suppresses gastric cancer growth. Gossypin attenuated anchorage-dependent and anchorage-independent gastric cancer cell growth as well as cell migration. Based on the results of in vitro screening and cell-based assays, gossypin directly binds to and inhibits AURKA and RSK2 activities and their downstream signaling proteins. Gossypin decreased S phase and increased G2/M phase cell cycle arrest by reducing the expression of cyclin A2 and cyclin B1 and the phosphorylation of the CDC protein. Additionally, gossypin also induced intrinsic apoptosis by activating caspases and PARP and increasing the expression of cytochrome c. Our results demonstrate that gossypin is an AURKA and RSK2 inhibitor that could be useful for treating gastric cancer.
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Affiliation(s)
- Li Wang
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China
| | - Xiangyu Wang
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China
| | - Hanyong Chen
- The Hormel Institute, University of Minnesota, Austin, Minnesota
| | - Xueyin Zu
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China.,The Pathophysiology Department, The School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Fayang Ma
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China.,The Pathophysiology Department, The School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China
| | - Kangdong Liu
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China.,The Pathophysiology Department, The School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, China.,The Affiliated Cancer Hospital, Zhengzhou University, Zhengzhou, Henan, China.,The Collaborative Innovation Center of Henan Province for Cancer Chemoprevention, Zhengzhou, Henan, China
| | - Ann M Bode
- The Hormel Institute, University of Minnesota, Austin, Minnesota
| | - Zigang Dong
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China.,The Hormel Institute, University of Minnesota, Austin, Minnesota.,The Collaborative Innovation Center of Henan Province for Cancer Chemoprevention, Zhengzhou, Henan, China
| | - Dong Joon Kim
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China
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Pereira A, Bester M, Soundy P, Apostolides Z. Anti-proliferative properties of commercial Pelargonium sidoides tincture, with cell-cycle G0/G1 arrest and apoptosis in Jurkat leukaemia cells. PHARMACEUTICAL BIOLOGY 2016; 54:1831-1840. [PMID: 26794080 DOI: 10.3109/13880209.2015.1129545] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 12/04/2015] [Indexed: 06/05/2023]
Abstract
Context Pelargonium sidoides DC (Geraniaceae) is an important medicinal plant indigenous to South Africa and Lesotho. Previous studies have shown that root extracts are rich in polyphenolic compounds with antibacterial, antiviral and immunomodulatory activities. Little is known regarding the anticancer properties of Pelargonium sidoides extracts. Objective This study evaluates the anti-proliferative effects of a Pelargonium sidoides radix mother tincture (PST). Materials and methods The PST was characterized by LC-MS/MS. Anti-proliferative activity was evaluated in the pre-screen panel of the National Cancer Institute (NCI-H460, MCF-7 and SF-268) and the Jurkat leukaemia cell line at concentrations of 0-150 μg/mL. The effect on cell growth was determined with sulphorhodamine B and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays after 72 h. The effect on cell cycle and apoptosis induction in Jurkat cells was determined by flow cytometry with propidium iodide and Annexin V: fluorescein isothiocyanate staining. Results Dihydroxycoumarin sulphates, gallic acid as well as gallocatechin dimers and trimers were characterized in PST by mass spectrometry. Moderate anti-proliferative effects with GI50 values between 40 and 80 μg/mL were observed in the NCI-pre-screen panel. Strong activity observed with Jurkat cells with a GI50 value of 6.2 μg/mL, significantly better than positive control 5-fluorouracil (GI50 value of 9.7 μg/mL). The PST arrested Jurkat cells at the G0/G1 phase of the cell cycle and increased the apoptotic cells from 9% to 21%, while the dead cells increased from 4% to 17%. Conclusion We present evidence that P. sidoides has cancer cell type-specific anti-proliferative effects and may be a source of novel anticancer molecules.
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Affiliation(s)
- Andreia Pereira
- a Department of Biochemistry, Faculty of Natural and Agricultural Sciences , University of Pretoria , Pretoria , South Africa
| | - Megan Bester
- b Department of Anatomy, Faculty of Health Sciences , University of Pretoria , Pretoria , South Africa
| | - Puffy Soundy
- c Department of Crop Sciences, Faculty of Science , Tshwane University of Technology , Pretoria , South Africa
| | - Zeno Apostolides
- a Department of Biochemistry, Faculty of Natural and Agricultural Sciences , University of Pretoria , Pretoria , South Africa
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Shi L, Sun G. Low-Dose DMC Significantly Enhances the Effect of TMZ on Glioma Cells by Targeting Multiple Signaling Pathways Both In Vivo and In Vitro. Neuromolecular Med 2015; 17:431-42. [DOI: 10.1007/s12017-015-8372-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 10/03/2015] [Indexed: 11/28/2022]
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Shi L, Fei X, Wang Z. Demethoxycurcumin was prior to temozolomide on inhibiting proliferation and induced apoptosis of glioblastoma stem cells. Tumour Biol 2015; 36:7107-19. [PMID: 25877753 DOI: 10.1007/s13277-015-3427-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 04/06/2015] [Indexed: 11/26/2022] Open
Abstract
Temozolomide (TMZ) is widely used for treating glioblastoma (GBM), which can effectively inhibit the GBM growth for some months; however, it still could not prevent the invariable recurrence of GBM. The existence of glioma stem cells (GSCs) was considered to be a key factor. But TMZ has poor effects on GSCs. Recently, demethoxycurcumin (DMC) has been shown to display anti-tumor activities in malignant gliomas. However, its effects and the potential mechanisms on GSCs were still unclear. Our study showed that DMC was prior to TMZ on resulting in a significant increase in GSC apoptosis and a marked inhibition of cell growth in vitro. And combined treatment of DMC and TMZ showed more significant anti-GSC effects. Further research into the underlying mechanism demonstrated that this novel combinatorial regimen leads to changes of multiple cell signaling pathways including reactive oxygen species (ROS) production and caspase-3 signaling mitochondria-related apoptosis activation as well as inactivation of JAK/STAT3 signaling pathway. Taken together, our data demonstrate that the anti-GSC effects of DMC are better than TMZ, and combined treatment of DMC and TMZ has much stronger effects on GSCs.
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Affiliation(s)
- Lei Shi
- Department of Neurosurgery, The First People's Hospital of Kunshan Affiliated with Jiangsu University, Suzhou, 215300, People's Republic of China.
| | - Xifeng Fei
- Department of Neurosurgery, Suzhou Kowloon Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Suzhou, 215021, People's Republic of China
| | - Zhimin Wang
- Department of Neurosurgery, Suzhou Kowloon Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Suzhou, 215021, People's Republic of China.
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Anti-tumor effect of α-pinene on human hepatoma cell lines through inducing G2/M cell cycle arrest. J Pharmacol Sci 2015; 127:332-8. [PMID: 25837931 DOI: 10.1016/j.jphs.2015.01.008] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Revised: 01/27/2015] [Accepted: 01/28/2015] [Indexed: 01/10/2023] Open
Abstract
Pine needle oil from crude extract of pine needles has been used as an anti-cancer agent in Traditional Chinese Medicine. The α-pinene is a natural compound isolated from pine needle oil which has been shown anti-cancer activity. In previous study, we found that pine needle oil exhibited significant inhibitory effect on hepatoma carcinoma BEL-7402 cells. In this study, we investigate the inhibition of α-pinene on hepatoma carcinoma BEL-7402 cells in vitro and in vivo and further explore the mechanism. The results show that liver cancer cell growth was inhibited obviously with inhibitory rate of 79.3% in vitro and 69.1% in vivo, Chk1 and Chk2 levels were upregulated, CyclinB, CDC25 and CDK1 levels were downregulated.
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Ling H, Lu LF, He J, Xiao GH, Jiang H, Su Q. Diallyl disulfide selectively causes checkpoint kinase-1 mediated G2/M arrest in human MGC803 gastric cancer cell line. Oncol Rep 2014; 32:2274-82. [PMID: 25176258 DOI: 10.3892/or.2014.3417] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 08/04/2014] [Indexed: 11/06/2022] Open
Abstract
Previous studies have shown that diallyl disulfide (DADS), a naturally occurring anticancer agent in garlic, arrested human gastric cancer cells (MGC803) in the G2/M phase of the cell cycle. Due to the importance of cell cycle redistribution in DADS-mediated anticarcinogenic effects, we investigated the role of checkpoint kinases (Chk1 and Chk2) during DADS-induced cell cycle arrest. In the present study, the northern blot analysis showed that mRNA expression of for Chkl and Chk2 was unchanged. Notably, DADS induced the accumulation of phosphorylated Chk1, but not of Chk2, activated phospho-ATR (ATM-RAD3-related gene), and dowregulated CDC25C and cyclin B1 expression. Furthermore, CDC25C was immunoprecipitated by anti-Chk1 but not anti-Chk2. Results of the overexpression and knockdown studies, showed that Chk1 but not Chk2 regulated the DADS-induced G2/M arrest of MGC803 cells. The overexpression of Chk1 resulted in significantly increased DADS-induced G2/M arrest, increased DADS-induced Chk1 phosphorylation and inhibited CDC25C expression. Knockdown of Chk1 reduced DADS‑induced G2/M arrest and blocked the DADS-induced inhibition of CDC25C and cyclin B1 expression. These results suggested that Chk1 is important in DADS‑induced cell cycle G2/M arrest in the human MGC803 gastric cancer cell line. Furthermore, the DADS-induced G2/M checkpoint response is mediated by Chk1 signaling through ATR/Chk1/CDC25C/cyclin B1.
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Affiliation(s)
- Hui Ling
- Key Laboratory of Tumor Cellular and Molecular Pathology (University of South China), College of Hunan Province, Cancer Research Institute, Hengyang, Hunan 421001, P.R. China
| | - Li-Feng Lu
- Key Laboratory of Tumor Cellular and Molecular Pathology (University of South China), College of Hunan Province, Cancer Research Institute, Hengyang, Hunan 421001, P.R. China
| | - Jie He
- Key Laboratory of Tumor Cellular and Molecular Pathology (University of South China), College of Hunan Province, Cancer Research Institute, Hengyang, Hunan 421001, P.R. China
| | - Guo-Hua Xiao
- Key Laboratory of Tumor Cellular and Molecular Pathology (University of South China), College of Hunan Province, Cancer Research Institute, Hengyang, Hunan 421001, P.R. China
| | - Hao Jiang
- Center for Gastric Cancer Research of Hunan Province, University of South China, Hengyang, Hunan 421001, P.R. China
| | - Qi Su
- Key Laboratory of Tumor Cellular and Molecular Pathology (University of South China), College of Hunan Province, Cancer Research Institute, Hengyang, Hunan 421001, P.R. China
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