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Shih LJ, Hsu PC, Chuu CP, Shui HA, Yeh CC, Chen YC, Kao YH. Epigallocatechin-3-gallate Synergistically Enhanced Arecoline-Induced Cytotoxicity by Redirecting Cycle Arrest to Apoptosis. Curr Issues Mol Biol 2024; 46:1516-1529. [PMID: 38392216 PMCID: PMC10887523 DOI: 10.3390/cimb46020098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/08/2024] [Accepted: 02/10/2024] [Indexed: 02/24/2024] Open
Abstract
Carcinogens, such as arecoline, play a crucial role in cancer progression and continuous gene mutations by generating reactive oxygen species (ROS). Antioxidants can reduce ROS levels and potentially prevent cancer progression but may paradoxically enhance the survival of cancer cells. This study investigated whether epigallocatechin-3-gallate (EGCG), an antioxidant from green tea, could resolve this paradox. Prostate cancer cells (PC-3 cell line) were cultured and treated with arecoline combined with NAC (N-acetylcysteine) or EGCG; the combined effects on intracellular ROS levels and cell viability were examined using the MTT and DCFDA assays, respectively. In addition, apoptosis, cell cycle, and protein expression were investigated using flow cytometry and western blot analysis. Our results showed that EGCG, similar to NAC (N-acetylcysteine), reduced the intracellular ROS levels, which were elevated by arecoline. Moreover, EGCG not only caused cell cycle arrest but also facilitated cell apoptosis in arecoline-treated cells in a synergistic manner. These were evidenced by elevated levels of cyclin B1 and p27, and increased fragmentation of procaspase-3, PARP, and DNA. Our findings highlight the potential use of EGCG for cancer prevention and therapy.
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Affiliation(s)
- Li-Jane Shih
- Department of Medical Laboratory, Taoyuan Armed Forces General Hospital, Longtan, Taoyuan 325208, Taiwan
| | - Po-Chi Hsu
- Department of Life Sciences, National Central University, Jhongli, Taoyuan 320317, Taiwan
| | - Chih-Pin Chuu
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan, Miaoli 350401, Taiwan
| | - Hao-Ai Shui
- Graduate Institute of Medical Science, National Defense Medical Center, Taipei 114201, Taiwan
| | - Chien-Chih Yeh
- Department of Medical Laboratory, Taoyuan Armed Forces General Hospital, Longtan, Taoyuan 325208, Taiwan
| | - Yueh-Chung Chen
- Division of Cardiology, Department of Internal Medicine, Taipei City Hospital, Renai Branch, Taipei 106243, Taiwan
| | - Yung-Hsi Kao
- Department of Life Sciences, National Central University, Jhongli, Taoyuan 320317, Taiwan
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2
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Molecular pathways of oral submucous fibrosis and its progression to malignancy. Arch Oral Biol 2023; 148:105644. [PMID: 36804642 DOI: 10.1016/j.archoralbio.2023.105644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/09/2023]
Abstract
OBJECTIVE The review aims to comprehend various factors engaged in the alteration of molecular events resulting in Oral submucous fibrosis (OSMF) and its malignant transformation. DESIGN Literature pertinent to pathways involved in OSMF were explored in databases such as PubMed, Scopus and Google Scholar. The relevant literature was reviewed and critically appraised in this narrative review. RESULTS Areca nut components influence myriad of cellular molecules such as cytokines, growth factors, myofibroblasts, non-coding RNAs and alter their expression. These aberrantly expressed molecules drive the progression of OSMF from localized inflammation to fibrosis of buccal mucosa. The oral tissue suffers from oxidative stress, hypoxia, autophagy, aberration of cell cycle and DNA damage. Apoptosis of epithelial layer results in its atrophy facilitating deeper penetration of areca nut elements. With the advance of disease, epithelial-mesenchymal transition eventuates and promotes dysplasia. The jeopardized expression of various cellular molecules, suppressed apoptosis, along with increased genetic alterations and neovascularization favors the malignant transformation. CONCLUSION OSMF is a progressive disorder with complex mechanism of pathogenesis initiated by inflammation of oral mucosa. Continuous habit of areca nut chewing and the resulting insult to the tissues prevents healing process and is destined to debilitating disease which affects the quality of life with a higher probability of progression to malignancy.
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Senevirathna K, Pradeep R, Jayasinghe YA, Jayawickrama SM, Illeperuma R, Warnakulasuriya S, Jayasinghe RD. Carcinogenic Effects of Areca Nut and Its Metabolites: A Review of the Experimental Evidence. Clin Pract 2023; 13:326-346. [PMID: 36961055 PMCID: PMC10037666 DOI: 10.3390/clinpract13020030] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/14/2023] [Accepted: 02/18/2023] [Indexed: 02/25/2023] Open
Abstract
Oral cancers (OC) are among the most frequent malignancies encountered in Southeast Asia, primarily due to the prevalent habit of betel quid (BQ) and smokeless tobacco use in this region. Areca nut (AN), the primary ingredient in BQ, contains several alkaloids, including arecoline, arecaidine, guvacoline, and guvacine. These have been associated with both the AN abuse liability and carcinogenicity. Additionally, variations in AN alkaloid levels could lead to differences in the addictiveness and carcinogenic potential across various AN-containing products. Recent studies based on animal models and in vitro experiments show cellular and molecular effects induced by AN. These comprise promoting epithelial-mesenchymal transition, autophagy initiation, tissue hypoxia, genotoxicity, cytotoxicity, and cell death. Further, clinical research endorses these undesired harmful effects in humans. Oral submucosal fibrosis, a potentially malignant disease of the oral cavity, is predominantly reported from the geographical areas of the globe where AN is habitually chewed. OC in chronic AN users presents a more aggressive phenotype, such as resistance to anti-cancer drugs. The available evidence on the carcinogenicity of AN based on the findings reported in the recently published experimental studies is discussed in the present review.
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Affiliation(s)
- Kalpani Senevirathna
- Centre for Research in Oral Cancer (CROC), Faculty of Dental Sciences, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Roshan Pradeep
- Centre for Research in Oral Cancer (CROC), Faculty of Dental Sciences, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Yovanthi Anurangi Jayasinghe
- Centre for Research in Oral Cancer (CROC), Faculty of Dental Sciences, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Shalindu Malshan Jayawickrama
- Centre for Research in Oral Cancer (CROC), Faculty of Dental Sciences, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Rasika Illeperuma
- Centre for Research in Oral Cancer (CROC), Faculty of Dental Sciences, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Saman Warnakulasuriya
- Faculty of Dentistry, Oral and Craniofacial Sciences, King's College, London SE1 9RA, UK
| | - Ruwan Duminda Jayasinghe
- Centre for Research in Oral Cancer (CROC), Faculty of Dental Sciences, University of Peradeniya, Peradeniya 20400, Sri Lanka
- Department of Oral Medicine and Periodontology, Faculty of Dental Sciences, University of Peradeniya, Peradeniya 20400, Sri Lanka
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Swargiary P, Boruah N, Singh CS, Chatterjee A. Genome-wide analysis of DNaseI hypersensitivity unveils open chromatin associated with histone H3 modifications after areca nut with lime exposure. Mutagenesis 2022; 37:182-190. [DOI: 10.1093/mutage/geac015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 09/01/2022] [Indexed: 11/13/2022] Open
Abstract
Abstract
Research over the years revealed that precocious anaphase, securin overexpression, and genome instability in both target and nontarget cells are significantly associated with the increased risk of areca nut (AN) and lime-induced oral, esophageal, and gastric cancers. Further, hyperphosphorylation of Rb and histone H3 epigenetic modifications both globally and in the promoter region of the securin gene were demonstrated after AN + lime exposure. This study aims whether the extract of raw AN + lime relaxes chromatin structure which further facilitates the histone H3 epigenetic modifications during the initial phase of carcinogenesis. Three groups of mice (10 in each group) were used. The treated group consumed 1 mg/day/mice of AN extract with lime ad libitum in the drinking water for 60 days. The dose was increased by 1 mg every 60 days. Isolated nuclei were digested with DNaseI and 2 kb and below DNA was eluted from the agarose gel, purified and PCR amplified by using securin and GAPDH primers. Securin and E2F1 expression, pRb phosphorylation, and histone epigenetic modifications were analyzed by immunohistochemistry. The number of DNA fragments within 2 kb in size after DNaseI treatment was higher significantly in AN + lime exposed tissue samples than in the untreated one. The PCR result showed that the number of fragments bearing securin gene promoter and GAPDH gene was significantly higher in AN + lime exposed DNaseI-treated samples. Immunohistochemistry data revealed increased Rb hyperphosphorylation, upregulation of E2F1, and securin in the AN + lime-treated samples. Increased trimethylation of histone H3 lysine 4 and acetylation of H3 lysine 9 and 18 were observed globally in the treated samples. Therefore, the results of this study have led to the hypothesis that AN + lime exposure relaxes the chromatin, changes the epigenetic landscape, and deregulates the Rb–E2F1 circuit which might be involved in the upregulation of securin and some other proto-oncogenes that might play an important role in the initial phases of AN + lime mediated carcinogenesis.
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Affiliation(s)
- Pooja Swargiary
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
| | - Nabamita Boruah
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
| | - Chongtham Sovachandra Singh
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
| | - Anupam Chatterjee
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
- Department of Biotechnology, Royal School of Biosciences, The Assam Royal Global University , Guwahati, Assam 781035 , India
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Boruah N, Singh CS, Swargiary P, Dkhar H, Chatterjee A. Securin overexpression correlates with the activated Rb/E2F1 pathway and histone H3 epigenetic modifications in raw areca nut-induced carcinogenesis in mice. Cancer Cell Int 2022; 22:30. [PMID: 35033090 PMCID: PMC8761315 DOI: 10.1186/s12935-022-02442-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 01/01/2022] [Indexed: 12/22/2022] Open
Abstract
Background Raw areca nut (RAN) consumption induces oral, esophageal and gastric cancers, which are significantly associated with the overexpression of pituitary tumor transforming gene 1/securin and chromosomal instability (CIN). An association of Securin/PTTG1 upregulation and gastric cancer in human was also demonstrated earlier. Since the molecular mechanism underlying securin upregulation remains unclear, this study intended to investigate the association of securin upregulation with the Rb-E2F1 circuit and epigenetic histone (H3) modification patterns both globally and in the promoter region of the securin gene. Methods Six groups of mice were used, and in the treated group, each mouse consumed 1 mg of RAN extract with lime per day ad libitum in the drinking water for 60 days, after which the dose was increased by 1 mg every 60 days. Histopathological evaluation of stomach tissues was performed and securin expression was analysed by immunoblotting as well as by immunohistochemistry. ChIP-qPCR assays were performed to evaluate the recruitment of different histone modifications in the core promoter region of securin gene as well as its upstream and downstream regions. Results All mice developed gastric cancer with securin overexpression after 300 days of feeding. Immunohistochemistry data revealed hyperphosphorylation of Rb and upregulation of E2F1 in the RAN-treated samples. Increased trimethylation of H3 lysine 4 and acetylation of H3 lysine 9 and 18 both globally and in the promoter region of the securin gene were observed by increasing the levels of lysine-N-methyltransferase 2A, lysine-acetyltransferase, EP-300 and PCAF after RAN treatment. ChIP-qPCR data revealed that the quantity of DNA fragments retrieved from the immunoprecipitated samples was maximum in the -83 to -192 region than further upstream and the downstream of the promoter for H3K4Me3, H3K9ac, H3K18ac and H3K9me3. Conclusions RAN-mediated pRb-inactivation induced securin upregulation, a putative E2F1 target, by inducing misregulation in chromatin remodeling in its promoter region, which led to transcriptional activation and subsequent development of chromosomal instability. Therefore, present results have led to the hypothesis that RAN-induced changes in the epigenetic landscape, securin overexpression and subsequent elevation of chromosomal instability is probably byproducts of inactivation of the pRb pathway. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-022-02442-z.
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Affiliation(s)
- Nabamita Boruah
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Chongtham Sovachandra Singh
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Pooja Swargiary
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Hughbert Dkhar
- Histopathology Division, Nazareth Hospital, Laitumkhrah, Shillong, 793003, India
| | - Anupam Chatterjee
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India.
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Betel Nut Chewing Decreased Calcaneus Ultrasound T-Score in a Large Taiwanese Population Follow-Up Study. Nutrients 2021; 13:nu13103655. [PMID: 34684655 PMCID: PMC8541161 DOI: 10.3390/nu13103655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/12/2021] [Accepted: 10/18/2021] [Indexed: 02/05/2023] Open
Abstract
Chewing betel nut is common in Taiwan. Although previous studies have shown that chewing betel nuts is associated with adverse health effects, findings about the impact on bone density have been inconsistent. Therefore, the aim of this study was to investigate the correlation between betel nut chewing and calcaneus ultrasound T-score in a longitudinal study of 118,856 participants from the Taiwan Biobank. Of these participants, 27,002 were followed up with for a median of 4 years. The T-score of the calcaneus was measured in the non-dominant foot using ultrasound. Multivariable analysis showed that a history of chewing betel nut (coefficient β = −0.232; p < 0.001) was significantly associated with low baseline T-score in all participants (n = 118,856). In addition, a long duration of betel nut chewing (per 1 year; coefficient β = −0.003; p = 0.022) was significantly associated with a low baseline T-score in the participants with a history of chewing betel nut (n = 7210). Further, a long duration of betel nut chewing (per 1 year; coefficient β = −0.004; p = 0.039) was significantly associated with a low ΔT-score in the participants with a history of chewing betel nut (n = 1778) after 4 years of follow-up. In conclusion, our results showed that betel nut chewing was associated with a decrease in calcaneus ultrasound T-score, and thus, it is important to stop chewing betel nut to help prevent an increased risk of osteoporosis in the Taiwanese population.
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Kadam S, Vandana M, Patwardhan S, Kaushik KS. Looking beyond the smokescreen: can the oral microbiome be a tool or target in the management of tobacco-associated oral cancer? Ecancermedicalscience 2021; 15:1179. [PMID: 33777172 PMCID: PMC7987485 DOI: 10.3332/ecancer.2021.1179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Indexed: 11/07/2022] Open
Abstract
A wide range of microbes inhabit the oral cavity, and bacterial and fungal communities most often exist as structured communities or biofilms. The use of tobacco alters the structure of the oral microbiome, including that of potentially malignant lesions, and the altered oral microbiome influences key microenvironmental changes such as chronic inflammation, secretion of carcinogenic toxins, cellular and tissue remodelling and suppression of apoptosis. Given this, it is clear that the bacterial and fungal biofilms in potentially malignant states are likely not passive entities, but could play a critical role in shaping potential malignant and carcinogenic conditions. This holds potential towards leveraging the oral microbiome for the management of tobacco-associated potentially malignant lesions and oral cancer. Here, we explore this line of investigation by reviewing the effects of tobacco in shaping the oral microbiome, and analyse the available evidence in the light of the microbiome of oral potentially malignant and cancerous lesions, and the role of dysbiosis in carcinogenesis. Finally, we discuss possible interventions and approaches using which the oral microbiome could be leveraged towards precision-based oral cancer therapeutics.
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Affiliation(s)
- Snehal Kadam
- Human-Relevant Infection Biology Group, Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India
| | - Madhusoodhanan Vandana
- Human-Relevant Infection Biology Group, Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India
| | - Sudhanshu Patwardhan
- Centre for Health Research and Education, University of Southampton Science Park, Chilworth, Hampshire SO16 7NP, UK
| | - Karishma S Kaushik
- Human-Relevant Infection Biology Group, Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune 411007, India
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Glutathione S-transferasesP1 AA (105Ile) allele increases oral cancer risk, interacts strongly with c-Jun Kinase and weakly detoxifies areca-nut metabolites. Sci Rep 2020; 10:6032. [PMID: 32265484 PMCID: PMC7138809 DOI: 10.1038/s41598-020-63034-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 03/19/2020] [Indexed: 11/21/2022] Open
Abstract
The Glutathione S-transferases (GSTs) protects cellular DNA against oxidative damage. The role of GSTP1 polymorphism (A313G; Ile105Val) as a susceptibility factor in oral cancer was evaluated in a hospital-based case-control study in North-East India, because the habit of chewing raw areca-nut (RAN) with/without tobacco is common in this region. Genetic polymorphism was investigated by genotyping 445 cases and 444 controls. Individuals with the GSTP1 AA-genotype showed association with the oral cancer (OR = 3.1, 95% CI = 2.4–4.2, p = 0.0002). Even after adjusting for age, sex and habit the AA-genotype is found to be significantly associated with oral cancer (OR = 2.4, 95% CI = 1.7–3.2, p = 0.0001). A protein-protein docking analysis demonstrated that in the GG-genotype the binding geometry between c-Jun Kinase and GSTP1 was disrupted. It was validated by immunohistochemistry in human samples, showing lower c-Jun-phosphorylation and down-regulation of pro-apoptotic genes in normal oral epithelial cells with the AA-genotype. In silico docking revealed that AA-genotype weakly detoxifies the RAN/tobacco metabolites. In addition, experiments revealed a higher level of 8-Oxo-2′-deoxyguanosine induction in tumor samples with the AA-genotype. Thus, habit of using RAN/tobacco and GSTP1 AA-genotype together play a significant role in predisposition to oral cancer risk by showing higher DNA-lesions and lower c-Jun phosphorylation that may inhibit apoptosis.
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Begum SF, Nagajothi G, Latha KS, Sandeep G, Sreekanth B, Kumar CS, Rajendra W, Maddu N. Possible role of nicotine and cotinine on nitroxidative stress and antioxidant content in saliva of smokeless tobacco consumers. Pract Lab Med 2018; 12:e00105. [PMID: 30090844 PMCID: PMC6078104 DOI: 10.1016/j.plabm.2018.e00105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 05/06/2018] [Accepted: 07/16/2018] [Indexed: 01/01/2023] Open
Abstract
The aim of the study is to levels of nicotine and cotinine were elevated the oxidative stress malondialdehyde (MDA) and inflammation as nitric oxide (NO2 and NO3) may possibly be associated with decreased antioxidant enzyme activities and can sensitively indicate the production of reactive oxygen species (ROS). To evaluate the quantitative analysis of nicotine and cotinine levels and the alterations in the selected parameters of antioxidant metabolisms during nitroxidative stress in the saliva of smokeless tobacco consumers. Saliva nicotine and cotinine was measured by HPLC method and nitric oxide, lipid peroxidation and activities of antioxidant enzymes were estimated by spectrophotometric methods. Significant increase in concentrations of nicotine and cotinine levels of saliva in smokeless tobacco users in comparison to controls. Saliva lipid peroxidation was increased in experimental subjects (gutkha group 39.28% and khaini group 25.00%) as compared to controls and nitric oxide in the form of nitrites and nitrates was significantly increased in the saliva of smokeless tobacco users compared to controls. The activity levels of antioxidant enzymes were decreased in the saliva of the smokeless tobacco users in comparison with normal controls. A strong positive correlation of nicotine and cotinine with nitroxidative stress markers in gutkha and khaini users. Increased expression of inducible nitric oxide synthase (iNOS) enzyme leads to intoxication in saliva and indirectly induces inflammation process. Increased production of reactive oxygen species (ROS) and decrease in the activity levels of antioxidant enzymes in the saliva of smokeless tobacco users indicate conspicuous cell and tissue damage.
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Key Words
- Antioxidant enzymes
- CAT, Catalase
- Cotinine
- DCM, Dichloromethane
- DEE, Diethyl ether
- Free radicals
- GPx, Glutathione peroxidase
- GSH, Reduced glutathione
- GST, Glutathione S-Transferase
- MDA, malondialdehyde
- NOS, Nitric oxide synthase
- Nicotine
- RNS, Reactive nitrogen species
- ROS, Reactive oxygen species
- RP-HPLC
- SLT, Smokeless tobacco
- SOD, Superoxide dismutase
- Smokeless tobacco
- TBA, Thiobarbituric acid
- TBARS, Thiobarbituric acid reacting substance
- TCA, Trichloro acetic acid
- TSNA, Tobacco- specific nitrosamines
- eNOS, Endothelial nitric oxide synthase
- iNOS, Inducible nitric oxide synthase
- nNOS, Neuronal nitric oxide synthase
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Affiliation(s)
- Shaik Fareeda Begum
- Department of Biochemistry, Sri Krishnadevaraya University, Ananthapuramu 515003, Andhra Pradesh, India
| | - Gutam Nagajothi
- Department of Corporate Secretaryship, Queen Mary's College (Autonomous), Chennai 600004, Tamilnadu, India
| | - Kodidela Swarna Latha
- Department of Biochemistry, Sri Krishnadevaraya University, Ananthapuramu 515003, Andhra Pradesh, India
| | - G. Sandeep
- Division of Molecular Biology, Department of Zoology, Sri Venkateswara University, Tirupati 517502, Andhra Pradesh, India
| | - Bandi Sreekanth
- Department of Zoology, Sri Krishnadevaraya University, Ananthapuramu 515003, Andhra Pradesh, India
| | - Chitta Suresh Kumar
- Department of Biochemistry, Sri Krishnadevaraya University, Ananthapuramu 515003, Andhra Pradesh, India
| | - W. Rajendra
- Division of Molecular Biology, Department of Zoology, Sri Venkateswara University, Tirupati 517502, Andhra Pradesh, India
| | - Narendra Maddu
- Department of Biochemistry, Sri Krishnadevaraya University, Ananthapuramu 515003, Andhra Pradesh, India
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Shakya B, Shakya S, Hasan Siddique Y. Effect of geraniol against arecoline induced toxicity in the third instar larvae of transgenic Drosophila melanogaster (hsp70-lacZ) Bg 9. Toxicol Mech Methods 2018; 29:187-202. [PMID: 30318983 DOI: 10.1080/15376516.2018.1534299] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In the present study geraniol at the final concentration of 10, 20, 30, and 40 µM was mixed in the diet along with 80 µM of arecoline and the third instar larvae of transgenic Drosophila melanogaster (hsp70-lacZ) Bg9 were allowed to feed on it for 24 hrs. After the exposure of 24 hrs the larvae were subjected to ONPG, X-gal, trypan blue exclusion test, oxidative stress markers and apoptotic and comet assays. The exposure of larvae to geraniol showed a dose dependent decrease in the activity of β-galactosidase, tissue damage and oxidative stress markers. A dose dependent decrease in apoptosis and DNA damage was also observed. Molecular docking studies also support the protective role of geraniol against the arecoline induced toxicity. The results suggest that geraniol is potent in reducing the toxicity induced by arecoline in the third instar larvae of transgenic Drosophila melanogaster (hsp70-lacZ) Bg9.
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Affiliation(s)
- Barkha Shakya
- a Department of Zoology , Aligarh Muslim University , Aligarh , India
| | - Sonam Shakya
- b Department of Chemistry , Aligarh Muslim University , Aligarh , India
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Divyambika CV, Sathasivasubramanian S, Vani G, Vanishree AJ, Malathi N. Correlation of Clinical and Histopathological Grades in Oral Submucous Fibrosis Patients with Oxidative Stress Markers in Saliva. Indian J Clin Biochem 2018; 33:348-355. [PMID: 30072836 PMCID: PMC6052729 DOI: 10.1007/s12291-017-0689-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Accepted: 08/20/2017] [Indexed: 01/29/2023]
Abstract
This study aimed to correlate the oxidative stress marker levels in saliva with the clinical stage based on mouth opening, fibrotic bands and histopathological grades of oral submucous fibrosis (OSF) patients. The study included patients clinically diagnosed with OSF (n = 63) and equal number of age and gender matched controls. Patients with OSF were defined by mouth opening stage, fibrotic bands and histopathological grades. Unstimulated saliva from both control and OSF patients were analysed for oxidative markers like lipid peroxides (LPO), non-enzymic antioxidants [reduced glutathione (GSH), vitamin A, vitamin E, vitamin C] and enzymatic antioxidants [glutathione peroxidase (GPx), superoxide dismutase (SOD)] and correlated with different stages and grades. Total salivary protein and LPO were significantly increased in OSF group with no significant change in the levels of GSH compared to controls. In OSF patients, a significant decrease in the levels of vitamins A, C and E was observed. The activities of salivary SOD and GPx were significantly decreased in OSF patients compared to controls. These changes significantly correlated with the increasing and differing grades of OSF that reflects increased oxidative stress with the progress of OSF.
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Affiliation(s)
- C. V. Divyambika
- Department of Oral Medicine and Radiology, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, 600 116 India
| | - S. Sathasivasubramanian
- Department of Oral Medicine and Radiology, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, 600 116 India
| | - G. Vani
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai, 600 025 India
| | - A. J. Vanishree
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai, 600 025 India
| | - N. Malathi
- Department of Oral Pathology, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, 600 116 India
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Chen PH, Mahmood Q, Mariottini GL, Chiang TA, Lee KW. Adverse Health Effects of Betel Quid and the Risk of Oral and Pharyngeal Cancers. BIOMED RESEARCH INTERNATIONAL 2017; 2017:3904098. [PMID: 29376073 PMCID: PMC5742426 DOI: 10.1155/2017/3904098] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 05/01/2017] [Accepted: 05/18/2017] [Indexed: 02/06/2023]
Abstract
Global reports estimate 600 million betel quid (BQ) chewers. BQ chewing has been demonstrated not only to be a risk factor for cancers of the oral cavity and pharynx and oral potentially malignant disorders (OPMD) but also to cause other cancers and adverse health effects. Herein, we summarized the international comparison data to aid in the understanding of the close relationship between the prevalence of BQ chewing, the occurrence of oral and pharyngeal cancers, and adverse health effects. Potential biomarkers of BQ carcinogens, such as areca nut, alkaloids, and 3-methylnitrosaminopropionitrile (MNPN), are closely associated with human health toxicology. Molecular mechanisms or pathways involving autophagy, hypoxia, COX-2, NF-κB activity, and stemness are known to be induced by BQ ingredients and are very closely related to the carcinogenesis of cancers of oral and pharynx. BQ abuse-related monoamine oxidase (MAO) gene was associated with the occurrence and progress of oral and pharyngeal cancers. In summary, our review article provides important insights into the potential roles of environmental BQ (specific alkaloid biomarkers and nitrosamine products MNPN) and genetic factors (MAO) and offers a basis for studies aiming to reduce or eliminate BQ-related OPMD and oral/pharyngeal cancer incidences in the future.
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Affiliation(s)
- Ping-Ho Chen
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, No. 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, No. 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
- Cancer Center, Kaohsiung Medical University Hospital, Kaohsiung Medical University, No. 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
- Institute of Biomedical Sciences, National Sun Yat-sen University, No. 70 Lienhai Road, Kaohsiung 80424, Taiwan
| | - Qaisar Mahmood
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan
| | - Gian Luigi Mariottini
- Department of Earth, Environment and Life Sciences (DISTAV), University of Genova, Viale Benedetto XV 5, 16132 Genova, Italy
| | - Tai-An Chiang
- College of Human Science and Technology, Chung Hwa University of Medical Technology, No. 89, Wenhwa 1st St., Rende Shiang, Tainan 71703, Taiwan
| | - Ka-Wo Lee
- Department of Otolaryngology, Kaohsiung Medical University Hospital, No. 100 Shih-Chuan 1st Road, Kaohsiung 807, Taiwan
- Department of Otolaryngology, College of Medicine, Kaohsiung Medical University, No. 100 Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan
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Niaz K, Maqbool F, Khan F, Bahadar H, Ismail Hassan F, Abdollahi M. Smokeless tobacco ( paan and gutkha) consumption, prevalence, and contribution to oral cancer. Epidemiol Health 2017; 39:e2017009. [PMID: 28292008 PMCID: PMC5543298 DOI: 10.4178/epih.e2017009] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/09/2017] [Indexed: 01/19/2023] Open
Abstract
Smokeless tobacco consumption, which is widespread throughout the world, leads to oral submucous fibrosis (OSMF), which is a long-lasting and devastating condition of the oral cavity with the potential for malignancy. In this review, we mainly focus on the consumption of smokeless tobacco, such as paan and gutkha, and the role of these substances in the induction of OSMF and ultimately oral cancer. The list of articles to be examined was established using citation discovery tools provided by PubMed, Scopus, and Google Scholar. The continuous chewing of paan and swallowing of gutkha trigger progressive fibrosis in submucosal tissue. Generally, OSMF occurs due to multiple risk factors, especially smokeless tobacco and its components, such as betel quid, areca nuts, and slaked lime, which are used in paan and gutkha. The incidence of oral cancer is higher in women than in men in South Asian countries. Human oral epithelium cells experience carcinogenic and genotoxic effects from the slaked lime present in the betel quid, with or without areca nut. Products such as 3-(methylnitrosamino)-proprionitrile, nitrosamines, and nicotine initiate the production of reactive oxygen species in smokeless tobacco, eventually leading to fibroblast, DNA, and RNA damage with carcinogenic effects in the mouth of tobacco consumers. The metabolic activation of nitrosamine in tobacco by cytochrome P450 enzymes may lead to the formation of N-nitrosonornicotine, a major carcinogen, and micronuclei, which are an indicator of genotoxicity. These effects lead to further DNA damage and, eventually, oral cancer.
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Affiliation(s)
- Kamal Niaz
- International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran.,Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Faheem Maqbool
- International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran.,Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Fazlullah Khan
- International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran.,Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Haji Bahadar
- Institute of Paramedical Sciences, Khyber Medical University, Peshawar, Pakistan
| | - Fatima Ismail Hassan
- International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran.,Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Abdollahi
- International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran.,Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.,Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Chang MC, Chan CP, Chen YJ, Hsien HC, Chang YC, Yeung SY, Jeng PY, Cheng RH, Hahn LJ, Jeng JH. Areca nut components stimulate ADAM17, IL-1α, PGE2 and 8-isoprostane production in oral keratinocyte: role of reactive oxygen species, EGF and JAK signaling. Oncotarget 2016; 7:16879-94. [PMID: 26919242 PMCID: PMC4941357 DOI: 10.18632/oncotarget.7621] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 02/09/2016] [Indexed: 11/25/2022] Open
Abstract
Betel quid (BQ) chewing is an etiologic factor of oral submucous fibrosis (OSF) and oral cancer. There are 600 million BQ chewers worldwide. The mechanisms for the toxic and inflammatory responses of BQ are unclear. In this study, both areca nut (AN) extract (ANE) and arecoline stimulated epidermal growth factor (EGF) and interleukin-1α (IL-1α) production of gingival keratinocytes (GKs), whereas only ANE can stimulate a disintegrin and metalloproteinase 17 (ADAM17), prostaglandin E2 (PGE2) and 8-isoprostane production. ANE-induced EGF production was inhibited by catalase. Addition of anti-EGF neutralizing antibody attenuated ANE-induced cyclooxygenase-2 (COX-2), mature ADAM9 expression and PGE2 and 8-isoprostane production. ANE-induced IL-1α production was inhibited by catalase, anti-EGF antibody, PD153035 (EGF receptor antagonist) and U0126 (MEK inhibitor) but not by α-naphthoflavone (cytochrome p450-1A1 inhibitor). ANE-induced ADAM17 production was inhibited by pp2 (Src inhibitor), U0126, α-naphthoflavone and aspirin. AG490 (JAK inhibitor) prevented ANE-stimulated ADAM17, IL-1α, PGE2 production, COX-2 expression, ADAM9 maturation, and the ANE-induced decline in keratin 5 and 14, but showed little effect on cdc2 expression and EGF production. Moreover, ANE-induced 8-isoprostane production by GKs was inhibited by catalase, anti-EGF antibody, AG490, pp2, U0126, α-naphthoflavone, Zinc protoporphyrin (ZnPP) and aspirin. These results indicate that AN components may involve in BQ-induced oral cancer by induction of reactive oxygen species, EGF/EGFR, IL-1α, ADAMs, JAK, Src, MEK/ERK, CYP1A1, and COX signaling pathways, and the aberration of cell cycle and differentiation. Various blockers against ROS, EGF, IL-1α, ADAM, JAK, Src, MEK, CYP1A1, and COX can be used for prevention or treatment of BQ chewing-related diseases.
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Affiliation(s)
- Mei-Chi Chang
- Team of Biomedical Science, Chang-Gung University of Science and Technology, Kwei-Shan, Taoyuan City, Taiwan
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Chiu-Po Chan
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Yi-Jane Chen
- Laboratory of Pharmacology, Toxicology and Chemical Carcinogenesis, School of Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
| | - Hsiang-Chi Hsien
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Ya-Ching Chang
- Department of Dentistry, Mackay Memorial Hospial, and Mackay Junior College of Medicine, Nursing and Management, Taipei, Taiwan
| | - Sin-Yuet Yeung
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Po-Yuan Jeng
- School of Dentistry, University of Cardenal Herrera, CEU, Valencia, Spain
| | - Ru-Hsiu Cheng
- Laboratory of Pharmacology, Toxicology and Chemical Carcinogenesis, School of Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
| | - Liang-Jiunn Hahn
- Laboratory of Pharmacology, Toxicology and Chemical Carcinogenesis, School of Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
| | - Jiiang-Huei Jeng
- Laboratory of Pharmacology, Toxicology and Chemical Carcinogenesis, School of Dentistry and Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College, Taipei, Taiwan
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15
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Preethi S, Jose JI, Sivapathasundharam B, Sabarinath B. Evaluation of Salivary Nitric Oxide Levels in Smokers, Tobacco Chewers and Patients with Oral Lichenoid Reactions. J Clin Diagn Res 2016; 10:ZC63-6. [PMID: 26894179 DOI: 10.7860/jcdr/2016/16517.7126] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 12/07/2015] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Nitric oxide (NO), a free radical, acts as a signalling molecule affecting numerous physiological and pathological processes. Role of nitric oxide as a mediator in tobacco related habits and the resultant oral lichenoid reactions was assessed. AIM The aim of the study is to evaluate and compare the salivary nitric oxide levels in normal patients with that of smokers, tobacco chewers and patients with oral lichenoid reactions. MATERIALS AND METHODS One hundred and twenty patients were enrolled in the study which included 30 healthy patients without any chronic inflammatory lesion and habit as controls (group I), 30 smokers without the habit of tobacco/betel nut chewing and any oral lesion (group II), 30 tobacco chewers without the habit of smoking and any oral lesion (group III) and 30 histologically confirmed cases of oral lichenoid reaction with the habit of tobacco usage (group IV). Saliva from these patients was collected and the nitrite concentration was assessed. RESULTS Our results concluded that there was highly significant increase in the nitric oxide levels in smokers, tobacco chewers and patients with oral lichenoid reactions compared to that of controls. Also, there was a significant increase in nitric oxide levels in patients with smoking associated oral lichenoid reactions in comparison with smokers and in patients with lichenoid reactions associated with tobacco chewing in comparison with tobacco chewers. CONCLUSION Estimation of salivary nitric oxide levels is a simple, non-invasive procedure and could be analysed to suggest the role of nitric oxide in the pathogenesis of these lesions. The increased activity of the enzyme may indicate that nitric oxide has a pathophysiological role in these lesions.
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Affiliation(s)
- S Preethi
- Senior Lecturer, Department of Oral Pathology, Meenakshi Ammal Dental College , Chennai, India
| | - Joy Idiculla Jose
- Head of Department, Department of Oral Pathology, Faculty of Dentistry, Melaka Manipal Medical College , India
| | - B Sivapathasundharam
- Head of the Department, Department of Oral Pathology, Meenakshi Ammal Dental College , Chennai, India
| | - B Sabarinath
- Reader, Department of Oral Pathology, Meenakshi Ammal Dental College , Chennai, India
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Kurkalang S, Banerjee A, Dkhar H, Nongrum HB, Ganguly B, Islam M, Rangad GM, Chatterjee A. Precocious anaphase and expression of Securin and p53 genes as candidate biomarkers for the early detection in areca nut-induced carcinogenesis. Mutagenesis 2014; 30:381-9. [DOI: 10.1093/mutage/geu083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Katarkar A, Mukherjee S, Khan MH, Ray JG, Chaudhuri K. Comparative evaluation of genotoxicity by micronucleus assay in the buccal mucosa over comet assay in peripheral blood in oral precancer and cancer patients. Mutagenesis 2014; 29:325-334. [DOI: 10.1093/mutage/geu023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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18
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Saleem S, Abbasi ZA, Hameed A, Qureshi NR, Khan MA, Azhar A. Novel p53 codon 240 Ser > Thr coding region mutation in the patients of oral squamous cell carcinoma (OSCC). Tumour Biol 2014; 35:7945-50. [PMID: 24833091 DOI: 10.1007/s13277-014-2062-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/06/2014] [Indexed: 01/23/2023] Open
Abstract
Chewing habits of tobacco, betel quid (paan), and betel nut (chhaliya) are common traditions in Pakistan. Different other preparations and combination of flavors with tobacco, paan, and chhaliya ingredients are commonly available in the market and have received considerable attention as sources of carcinogens that promote OSCC. Mutagens can damage DNA and generate promutagenic lesions. The germ line mutation/polymorphism of p53 gene has been reported to be involved in multiple steps of carcinogenesis. This study aims to find out the loss of TP53 functions due to mutation/polymorphism caused by genomic alteration and interaction with tobacco-related ingredients.Tissue and blood specimens from 260 OSCC patients were collected and compared with blood samples of 260 age- and sex-matched controls. Mutations in exons 2-11 of p53 gene were examined by PCR-SSCP and directly sequenced.A novel mutation was found in exon 7 of p53 gene. This mutation was observed in the tumors of the OSCC patients. The blood samples of the patients and the controls did not show the nucleotide change in this region. The "AGT" to "ACT" missense mutation was identified at position 719 at TP53. This results in the substitution of amino acid serine with threonine at codon 240 of p53 protein.This novel missence mutation in the DNA-binding domain indicated that the DNA structure may be damaged by the use of exogenous DNA-damaging agents, including tobacco-related carcinogens present in gutka, niswar, and manpuri, which may result in the loss of p53 protein function.
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Affiliation(s)
- S Saleem
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, Pakistan,
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19
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Hsu WL, Chien YC, Chiang CJ, Yang HI, Lou PJ, Wang CP, Yu KJ, You SL, Wang LY, Chen SY, Yang CS, Chen CJ. Lifetime risk of distinct upper aerodigestive tract cancers and consumption of alcohol, betel and cigarette. Int J Cancer 2014; 135:1480-6. [DOI: 10.1002/ijc.28791] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 01/06/2014] [Accepted: 01/23/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Wan-Lun Hsu
- Genomics Research Center; Academia Sinica; Taipei Taiwan
| | - Yin-Chu Chien
- Molecular and Genomic Epidemiology Center; China Medical University Hospital; Taichung Taiwan
| | - Chun-Ju Chiang
- Graduate Institute of Epidemiology and Preventive Medicine College of Public Health; National Taiwan University; Taipei Taiwan
| | - Hwai-I Yang
- Genomics Research Center; Academia Sinica; Taipei Taiwan
- Molecular and Genomic Epidemiology Center; China Medical University Hospital; Taichung Taiwan
| | - Pei-Jen Lou
- Department of Otolaryngology; National Taiwan University Hospital; Taipei Taiwan
- Department of Otolaryngology; College of Medicine, National Taiwan University; Taipei Taiwan
| | - Cheng-Ping Wang
- Department of Otolaryngology; National Taiwan University Hospital; Taipei Taiwan
- Department of Otolaryngology; College of Medicine, National Taiwan University; Taipei Taiwan
| | - Kelly J. Yu
- Division of Cancer Prevention; National Cancer Institute, NIH, DHHS; Bethesda MD
| | - San-Lin You
- Genomics Research Center; Academia Sinica; Taipei Taiwan
- Department of Healthcare Management; Yuanpei University; Hsinchu Taiwan
| | - Li-Yu Wang
- Department of Medicine; Mackay Medical College; New Taipei city Taiwan
| | - Shu-Yuan Chen
- Department of Public Health; Tzu-Chi University; Hualien Taiwan
| | - Czau-Siung Yang
- Graduate Institute of Microbiology College of Medicine; National Taiwan University; Taipei Taiwan
| | - Chien-Jen Chen
- Genomics Research Center; Academia Sinica; Taipei Taiwan
- Graduate Institute of Epidemiology and Preventive Medicine College of Public Health; National Taiwan University; Taipei Taiwan
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Li WC, Lee PL, Chou IC, Chang WJ, Lin SC, Chang KW. Molecular and cellular cues of diet-associated oral carcinogenesis-with an emphasis on areca-nut-induced oral cancer development. J Oral Pathol Med 2014; 44:167-77. [DOI: 10.1111/jop.12171] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/23/2014] [Indexed: 12/25/2022]
Affiliation(s)
- Wan-Chun Li
- Department of Dentistry; School of Dentistry; National Yang-Ming University; Taipei Taiwan
- Institute of Oral Biology; School of Dentistry; National Yang-Ming University; Taipei Taiwan
- Department of Education and Research; Taipei City Hospital; Taipei Taiwan
| | - Pei-Lun Lee
- Institute of Oral Biology; School of Dentistry; National Yang-Ming University; Taipei Taiwan
| | - I-Chiang Chou
- Department of Dentistry; School of Dentistry; National Yang-Ming University; Taipei Taiwan
- Department of Dentistry; Zhong-Xiao Branch; Taipei City Hospital; Taipei Taiwan
| | - Wan-Jung Chang
- Institute of Oral Biology; School of Dentistry; National Yang-Ming University; Taipei Taiwan
| | - Shu-Chun Lin
- Department of Dentistry; School of Dentistry; National Yang-Ming University; Taipei Taiwan
- Institute of Oral Biology; School of Dentistry; National Yang-Ming University; Taipei Taiwan
- Department of Stomatology; Taipei Veterans General Hospital; Taipei Taiwan
| | - Kuo-Wei Chang
- Department of Dentistry; School of Dentistry; National Yang-Ming University; Taipei Taiwan
- Institute of Oral Biology; School of Dentistry; National Yang-Ming University; Taipei Taiwan
- Department of Stomatology; Taipei Veterans General Hospital; Taipei Taiwan
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Choudhari SK, Chaudhary M, Gadbail AR, Sharma A, Tekade S. Oxidative and antioxidative mechanisms in oral cancer and precancer: a review. Oral Oncol 2013; 50:10-8. [PMID: 24126222 DOI: 10.1016/j.oraloncology.2013.09.011] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/16/2013] [Accepted: 09/19/2013] [Indexed: 12/22/2022]
Abstract
Development of cancer in humans is a multistep process. Complex series of cellular and molecular changes participating in cancer development are mediated by a diversity of endogenous and exogenous stimuli and important amongst this is generation of reactive oxygen species (ROS). Reactive radicals and non-radicals are collectively known as ROS. These can produce oxidative damage to the tissues and hence are known as oxidants in biological system. Many researchers have documented the role of ROS in both initiation and promotion of multistep carcinogenesis. To mitigate the harmful effects of free radicals, all aerobic cells are endowed with extensive antioxidant defence mechanisms. Lowered antioxidant capacity or the oxidant-antioxidant imbalance can lead to oxidative damage to cellular macromolecules leading to cancer. Oral cavity cancer is an important cancer globally and tobacco is the primary etiological factor in its development. Tobacco consumption exposes the oral epithelium to toxic oxygen and nitrogen free radicals that can affect host antioxidant defence mechanisms. Elevated levels of ROS and Reactive Nitrogen Species (RNS) and lowered antioxidants are found in oral precancer and cancer. Protection can be provided by various antioxidants against deleterious action of these free radicals. Treatment with antioxidants has the potential to prevent, inhibit and reverse the multiple steps involved in oral carcinogenesis. This review is an attempt to understand the interesting correlation between ROS and RNS mediated cell damage and enzymatic and non-enzymatic defence mechanisms involved in oral cancer development and its progression and the use of antioxidants in oral cancer prevention and treatment.
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Affiliation(s)
- Sheetal Korde Choudhari
- Dept of Oral Pathology & Microbiology, Yerala Dental College and Hospital, Kharghar, Mumbai 410 210, India.
| | - Minal Chaudhary
- Dept of Oral Pathology & Microbiology, Sharad Pawar Dental College, Sawangi, Wardha, Maharashtra 442 001, India.
| | - Amol R Gadbail
- Dept of Oral Pathology & Microbiology, Sharad Pawar Dental College, Sawangi, Wardha, Maharashtra 442 001, India.
| | - Aparna Sharma
- Dept of Oral Pathology, VSPM Dental College and Hospital, Nagpur, Maharashtra 440 019, India.
| | - Satyajit Tekade
- Dept of Oral Pathology & Microbiology, Modern Dental College & Research Centre, Gandhi Nagar, Indore, Madhya Pradesh 453112, India.
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Chang LY, Wan HC, Lai YL, Chou IC, Chen YT, Hung SL. Areca nut extracts increased the expression of cyclooxygenase-2, prostaglandin E2 and interleukin-1α in human immune cells via oxidative stress. Arch Oral Biol 2013; 58:1523-31. [DOI: 10.1016/j.archoralbio.2013.05.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 12/23/2012] [Accepted: 05/29/2013] [Indexed: 11/29/2022]
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Kurkalang S, Banerjee A, Ghoshal N, Dkhar H, Chatterjee A. Induction of chromosome instability and stomach cancer by altering the expression pattern of mitotic checkpoint genes in mice exposed to areca-nut. BMC Cancer 2013; 13:315. [PMID: 23805780 PMCID: PMC3727982 DOI: 10.1186/1471-2407-13-315] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 06/20/2013] [Indexed: 12/31/2022] Open
Abstract
Background There are strong indications for a causal association between areca-nut consumption and cancers. In Meghalaya, India, the variety of areca-nut is used as raw and unprocessed form whose chemical composition and pharmacological actions have been reported. Yet we know little on the initial pathway involved in areca-nut associated carcinogenesis since it is difficult to assess its effects on genetic alterations without interference of other compounding factors. Therefore, present study was undertaken in mice to verify the ability of raw areca-nut (RAN) to induce cancer and to monitor the expression of certain genes involved in carcinogenesis. This study was not intended to isolate any active ingredients from the RAN and to look its action. Methods Three groups of mice (n = 25 in each) were taken and used at different time-points for different experimental analysis. The other three groups of mice (n = 15 in each) were considered for tumor induction studies. In each set, two groups were administered RAN-extract ad libitum in drinking water with or without lime. The expression of certain genes was assessed by conventional RT-PCR and immunoblotting. The mice were given the whole RAN-extract with and without lime in order to mimic the human consumption style of RAN. Results Histological preparation of stomach tissue revealed that RAN induced stomach cancer. A gradual increase in the frequency of precocious anaphase and aneuploid cells was observed in the bone marrow cells with a greater increment following RAN + lime administeration. Levels of p53, Bax, Securin and p65 in esophageal and stomach cells were elevated during early days of RAN exposure while those of different mitotic checkpoint proteins were downregulated. Apoptotic cell death was detected in non-cancerous stomach cells but not in tumor cells which showed overexpression of Bax and absence of PARP. Conclusion Present study suggested (a) RAN induces stomach cancer, however, presence of lime promoted higher cell transformation and thereby developed cancer earlier, (b) perturbations in components of the chromosome segregation machinery could be involved in the initial process of carcinogenicity and (c) the importance of precocious anaphase as a screening marker for identification of mitotic checkpoint defects during early days.
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Affiliation(s)
- Sillarine Kurkalang
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya 793022, India
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Selvaraj S, Mohan A, Narayanan S, Sethuraman S, Krishnan UM. Dose-Dependent Interaction of trans-Resveratrol with Biomembranes: Effects on Antioxidant Property. J Med Chem 2013; 56:970-81. [DOI: 10.1021/jm3014579] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Stalin Selvaraj
- Centre for Nanotechnology and
Advanced Biomaterials (CeNTAB), School of Chemical and Biotechnology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India
| | - Aarti Mohan
- Centre for Nanotechnology and
Advanced Biomaterials (CeNTAB), School of Chemical and Biotechnology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India
| | - Shridhar Narayanan
- Orchid Chemicals and Pharmaceuticals Ltd., Sozhiganallur, Chennai 600
119, Tamil Nadu, India
| | - Swaminathan Sethuraman
- Centre for Nanotechnology and
Advanced Biomaterials (CeNTAB), School of Chemical and Biotechnology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology and
Advanced Biomaterials (CeNTAB), School of Chemical and Biotechnology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India
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Wu M, Xing G, Qi X, Feng C, Liu M, Gong L, Luan Y, Ren J. Assessment of the mutagenic potential of arecoline in gpt delta transgenic mice. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2012; 748:65-9. [DOI: 10.1016/j.mrgentox.2012.07.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 06/21/2012] [Accepted: 07/02/2012] [Indexed: 11/29/2022]
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26
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Jyoti S, Khan S, Afzal M, Siddique YH. Micronucleus investigation in human buccal epithelial cells of gutkha users. Adv Biomed Res 2012; 1:35. [PMID: 23326766 PMCID: PMC3544097 DOI: 10.4103/2277-9175.100128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 03/07/2012] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Gutkha is a cheap and convenient betel quid substitute, which is popular among all age groups. Various studies reveal its carcinogenic nature that leads to oral submucosus fibrosis and increases the chances of oral cancer. The micronucleus (MN) assay in exfoliated mucosal cells is a useful method for observing genetic damage in humans. AIM To observe the genotoxic effect of gutkha on human buccal epithelial cells. MATERIALS AND METHODS The MN assay was performed to assess the frequency of MN in human buccal epithelial cells. The study comprises 60 individuals of which 30 individuals were gutkha chewers and another 30 were nonusers (control). The MN frequency was scored to estimate the genotoxic damage. RESULTS In gutkha users, the frequency of MN was highly significant (17.4 ± 0.944) as compared with nonusers (control) groups (4.53 ± 0.331) (P < 0.001). CONCLUSIONS The MN assay in human buccal epithelial cells is a useful and minimally invasive method for monitoring genetic damage in humans. Asignificantly higher frequency of micronucleated cells are found among gutkha users.
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Affiliation(s)
- Smita Jyoti
- Department of Zoology, Human Genetics and Toxicology Laboratory, Section of Genetics, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Saif Khan
- Department of Periodontics and Community Dentistry, Dr Z.A. Dental College, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Mohammad Afzal
- Department of Zoology, Human Genetics and Toxicology Laboratory, Section of Genetics, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Yasir Hasan Siddique
- Department of Zoology, Human Genetics and Toxicology Laboratory, Section of Genetics, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
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Sharan RN, Mehrotra R, Choudhury Y, Asotra K. Association of betel nut with carcinogenesis: revisit with a clinical perspective. PLoS One 2012; 7:e42759. [PMID: 22912735 PMCID: PMC3418282 DOI: 10.1371/journal.pone.0042759] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 07/11/2012] [Indexed: 01/04/2023] Open
Abstract
Betel nut (BN), betel quid (BQ) and products derived from them are widely used as a socially endorsed masticatory product. The addictive nature of BN/BQ has resulted in its widespread usage making it the fourth most abused substance by humans. Progressively, several additives, including chewing tobacco, got added to simple BN preparations. This addictive practice has been shown to have strong etiological correlation with human susceptibility to cancer, particularly oral and oropharyngeal cancers. The PUBMED database was searched to retrieve all relevant published studies in English on BN and BQ, and its association with oral and oropharyngeal cancers. Only complete studies directly dealing with BN/BQ induced carcinogenesis using statistically valid and acceptable sample size were analyzed. Additional relevant information available from other sources was also considered. This systematic review attempts to put in perspective the consequences of this widespread habit of BN/BQ mastication, practiced by approximately 10% of the world population, on oral cancer with a clinical perspective. BN/BQ mastication seems to be significantly associated with susceptibility to oral and oropharyngeal cancers. Addition of tobacco to BN has been found to only marginally increase the cancer risk. Despite the widespread usage of BN/BQ and its strong association with human susceptibility to cancer, no serious strategy seems to exist to control this habit. The review, therefore, also looks at various preventive efforts being made by governments and highlights the multifaceted intervention strategies required to mitigate and/or control the habit of BN/BQ mastication.
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Affiliation(s)
- Rajeshwar N Sharan
- Radiation and Molecular Biology Unit, Department of Biochemistry, North-Eastern Hill University, Shillong, Meghalaya, India.
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Chitra S, Balasubramaniam M, Hazra J. Effect of α-tocopherol on salivary reactive oxygen species and trace elements in oral submucous fibrosis. Ann Clin Biochem 2012; 49:262-5. [PMID: 22337705 DOI: 10.1258/acb.2011.011050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND Oral submucous fibrosis (OSMF) is a chronic debilitating disease and a well-recognized, potentially malignant condition of the oral cavity associated with betel quid chewing. Betel quid chewing is a popular oral habit in India and shows strong association in the incidence of OSMF. The objective of the study was to determine the levels of trace elements, pro-oxidants and reactive oxygen species (ROS) in saliva of betel quid chewers and OSMF patients, which may help in the diagnosis of cancer progression in the oral cavity. METHODS A total of 35 cases of OSMF and 35 cases of healthy individuals were included in the present study. The salivary status of ROS, pro-oxidants and some trace elements was studied in OSMF patients and normal healthy individuals. RESULTS The levels of lipid peroxides (P < 0.001), conjugated dienes (P < 0.01), hydroxyl radicals (P < 0.01), superoxide dismutase (P < 0.05), copper (P < 0.05), calcium (P < 0.01), magnesium (NS), potassium (P < 0.05) and iron (P < 0.05) in OSMF patients were elevated when compared with normal healthy individuals. The levels of hydrogen peroxide (P < 0.05) and sodium (P < 0.01) in OSMF patients were found to be decreased when compared with control subjects. A significant alteration was noticed after supplementing with α-tocopherol in oral precancerous patients. CONCLUSION These parameters may help in the detection of the severity of oral diseases.
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Affiliation(s)
- S Chitra
- Department of Biotechnology, Sri Ramachandra University, Chennai, India.
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Nazeer Shaiju S, Ariya S, Asish R, Salim Haris P, Anita B, Arun Kumar G, Jayasree RS. Habits with killer instincts: in vivo analysis on the severity of oral mucosal alterations using autofluorescence spectroscopy. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:087006. [PMID: 21895333 DOI: 10.1117/1.3608923] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Oral habits like chewing and smoking are main causes of oral cancer, which has a higher mortality rate than many other cancer forms. Currently, the long term survival rate of oral cancer is less than 50%, as a majority of cases are detected very late. The clinician's main challenge is to differentiate among a multitude of red, white, or ulcerated lesions. Hence, new noninvasive, reliable, and fast techniques for the discrimination of oral cavity disorders are to be developed. This study includes autofluorescence spectroscopic screening of normal volunteers with and without lifestyle oral habits and patients with oral submucous fibrosis (OSF). The spectra from different sites of habitués, non-habitués, and OSF patients were analyzed using the intensity ratio, redox ratio, and linear discriminant analysis (LDA). The spectral disparities among these groups are well demonstrated in the emission regions of collagen and Flavin adenine dinucleotide. We observed that LDA gives better efficiency of classification than the intensity ratio technique. Even the differentiation of habitués and non-habitués could be well established with LDA. The study concludes that the clinical application of autofluorescence spectroscopy along with LDA, yields spontaneous screening among individuals, facilitating better patient management for clinicians and better quality of life for patients.
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Affiliation(s)
- S Nazeer Shaiju
- Sree Chitra Tirunal Institute for Medical Sciences & Technology, Biophotonics and Molecular Imaging Lab, Biomedical Technology Wing, Poojappura, Thiruvananthapuram - 695 012, Kerala, India
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Arecoline-mediated inhibition of AMP-activated protein kinase through reactive oxygen species is required for apoptosis induction. Oral Oncol 2011; 47:345-51. [PMID: 21440488 DOI: 10.1016/j.oraloncology.2011.02.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 01/30/2011] [Accepted: 02/15/2011] [Indexed: 12/18/2022]
Abstract
Arecoline is the major alkaloid of areca nut (AN) and known to induce reactive oxygen species (ROS) production and apoptosis. The metabolic sensor AMP-activated protein kinase (AMPK), activated by ROS, also regulates apoptosis. This study used several types of cells as the experimental model to analyze the roles of ROS and AMPK in arecoline-induced apoptosis. We found that arecoline dose-dependently increased intracellular ROS level, and two antioxidants, N-acetyl-L-cysteine (NAC) and glutathione, attenuated arecoline-induced apoptotic cell death. Interestingly, arecoline dose- and time-dependently inhibited rather than stimulated AMPK-Thr(172) phosphorylation, and both NAC and glutathione relieved this inhibition. The AMPK activator, 5-aminoimidazole-4-carboxamide 1-β-D-ribofuranoside (AICAR), also restored the phosphorylation level of AMPK-Thr(172) and attenuated apoptotic cell death under arecoline insult. In contrast, the AMPK inhibitor, compound C, and RNA interference of AMPK expression increased the cytotoxicity of arecoline. Collectively, these results suggest that arecoline may inhibit AMPK through intracellular ROS, responsible for the execution of apoptosis.
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Lin MH, Hsieh WF, Chiang WF, Hong WZ, Hsu YR, Cheng YC, Chen TC, Hsu KC, Lina PY, Liu SY, Liu YC. Autophagy induction by the 30–100kDa fraction of areca nut in both normal and malignant cells through reactive oxygen species. Oral Oncol 2010; 46:822-8. [DOI: 10.1016/j.oraloncology.2010.08.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 08/02/2010] [Accepted: 08/03/2010] [Indexed: 10/19/2022]
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Damirchi A, Kiani M, Jafarian V, Sariri R. Response of salivary peroxidase to exercise intensity. Eur J Appl Physiol 2009; 108:1233-7. [PMID: 20035343 DOI: 10.1007/s00421-009-1331-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2009] [Indexed: 10/20/2022]
Abstract
Oral peroxidase, one of the most important salivary antioxidant enzymes, is subjected to alternation due to various body conditions. The aim of this study was to assess the effect of exercise intensity on salivary peroxidase activity. Using a randomized design, ten healthy male university students (mean age, 23.22; s (x) = 2.34 years) completed treadmill runs with initial velocity 6.73 km/h at the rate of 1.58 km/h increase every 3 min until exhaustion. Unstimulated whole saliva collected over a 5-min period in pre-weighed tubes before, immediately after exercise, and 1 h after exercise was analyzed for total protein and saliva peroxidase activity. The saliva flow rate ranged from 0.08 to 1.40 ml min(-1) at rest and was not significantly affected by the exercise. Peroxidase activity in each sample was measured using 4-amino antipyrine as substrate. In the incremental exhaustion run and also at 75% VO(2max), the secretion rates of peroxidase increased. No significant changes in saliva flow rate were observed in any treadmill run. Treadmill runs at 75% VO(2max) and to exhaustion increased the activity of peroxidase immediately after exercise which decreased after 1 h. It was concluded that short-duration, high-intensity exercise increases the activity rate of peroxidase despite no change in the saliva flow rate. These effects appear to be associated with changes in sympathetic activity and not the hypothalamic pituitary adrenal axis.
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Affiliation(s)
- A Damirchi
- Faculty of Physical Education and Sport Sciences, University of Guilan, Rasht, Iran
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Chang LY, Wan HC, Lai YL, Kuo YF, Liu TY, Chen YT, Hung SL. Areca nut extracts increased expression of inflammatory cytokines, tumor necrosis factor-α, interleukin-1β, interleukin-6 and interleukin-8, in peripheral blood mononuclear cells. J Periodontal Res 2009; 44:175-83. [DOI: 10.1111/j.1600-0765.2008.01104.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Hung KF, Lai KC, Liu TY, Liu CJ, Lee TC, Lo JF. Asb6 upregulation by Areca nut extracts is associated with betel quid-induced oral carcinogenesis. Oral Oncol 2009; 45:543-8. [PMID: 19251471 DOI: 10.1016/j.oraloncology.2008.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Revised: 10/02/2008] [Accepted: 10/02/2008] [Indexed: 01/14/2023]
Abstract
Betel quit (BQ) chewing is a popular habit, especially in southern and southeastern Asia. Areca nut extracts (ANE), the major components of BQ, have been documented to induce reactive oxygen species, and consequently to cause genetic damage. ANE usage is tightly linked to oral cancer; however, the details of the molecular mechanism that results in carcinogenesis remain unclear. Previously, we successfully established HaCaT cells surviving from the long-term exposure of sublethal doses of ANE (Lai KC, Lee TC. Genetic damage in cultured human keratinocytes stressed by long-term exposure to areca nut extracts. Mutat Res 2006;599:66-75). Here, we identified the upregulation of Asb6, a coupling protein to the APS adapter protein, which is involved in insulin signaling for glucose transportation, of normal keratinocytes and oral cancer cells under ANE treatment. Immunohistochemical analyses of Asb6 on oral squamous cell carcinoma (OSCC) tissues (n=57) demonstrated the positive correlation between Asb6 upregulation (cancerous tissues versus adjacent normal tissues) and clinicopathological features. We showed that the combination of ANE-enhanced Asb6 expression in vitro and Asb6 upregulation in OSCC patients leads to poor survival status. In conclusion, our results suggest that upregulated Asb6 could act as a prognostic marker for oral cancer.
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Affiliation(s)
- Kai-Feng Hung
- Institute of Oral Biology, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Pei-Tou, Taipei, Taiwan, ROC
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Sen S, Talukder G, Sharma A. Betel Cytotoxicity: Further Evidence from Mouse Bone Marrow Cells. ACTA ACUST UNITED AC 2008. [DOI: 10.3109/13880209109082864] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Soumitra Sen
- Centre for Advanced Study in Cell and Chromosome Research, University of Calcutta, 35, Ballygunge Circular Road, Calcutta, 700 019, India
| | - Geeta Talukder
- Centre for Advanced Study in Cell and Chromosome Research, University of Calcutta, 35, Ballygunge Circular Road, Calcutta, 700 019, India
| | - Archana Sharma
- Centre for Advanced Study in Cell and Chromosome Research, University of Calcutta, 35, Ballygunge Circular Road, Calcutta, 700 019, India
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Sen S, Talukder G, Sharma A. Induction of Unscheduled DNA Synthesis in Gastric Mucosa Treated in vivo with Betel Ingredients. ACTA ACUST UNITED AC 2008. [DOI: 10.3109/13880208909053941] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Bartsch H. Dr Jagadeesan Nair, Senior Scientist at the German Cancer Research Center (DKFZ) 1953–2007. Carcinogenesis 2008; 29:887-8. [DOI: 10.1093/carcin/bgm272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Almadori G, Bussu F, Galli J, Limongelli A, Persichilli S, Zappacosta B, Minucci A, Paludetti G, Giardina B. Salivary glutathione and uric acid levels in patients with head and neck squamous cell carcinoma. Head Neck 2007; 29:648-54. [PMID: 17274058 DOI: 10.1002/hed.20579] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND We evaluated the concentrations of glutathione and uric acid, low molecular weight antioxidants, in saliva of patients with head and neck squamous cell carcinoma (HNSCC), in order to identify differences with normal subjects and to obtain information about biochemical alterations of human saliva during carcinogenesis. METHODS We compared 50 HNSCC patients, divided in 2 subsets on the basis of tumor site, with a control group of 77 subjects, without a previous diagnosis of HNSCC, matched for age, sex, alcohol consumption, and smoking status. RESULTS At tests for equality of means by Welch and Brown-Forsythe, differences between groups resulted probable for salivary levels of glutathione (p = .004 and p < .001 respectively) but not for salivary levels of uric acid (p = .228 and p = .122 respectively). Comparing groups by Tamhane test, the patients with oral or pharyngeal cancer had significantly higher salivary levels of glutathione than both controls and patients with laryngeal cancer. CONCLUSIONS Salivary glutathione levels may be an index of oxidative stress at the level of the upper airways and in particular of oral cavity and pharynx. Therefore, high salivary glutathione may be an epidemiological marker to identify subjects with an increased risk of developing HNSCC, to submit to strict follow-up and chemoprevention. Metabolic alterations of saliva could be both an epidemiological marker and a target for chemoprevention of oral and oropharyngeal carcinogenesis.
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Affiliation(s)
- Giovanni Almadori
- Institute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy.
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Hirakawa K, Yoshida M, Oikawa S, Kawanishi S. Base Oxidation at 5′ Site of GG Sequence in Double-stranded DNA Induced by UVA in the Presence of Xanthone Analogues: Relationship Between the DNA-damaging Abilities of Photosensitizers and Their HOMO Energies ¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2003)0770349boasog2.0.co2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hirakawa K, Aoshima M, Hiraku Y, Kawanishi S. Photohydrolysis of Methotrexate Produces Pteridine, Which Induces Poly-G-specific DNA Damage Through Photoinduced Electron Transfer¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2002)0760467pomppw2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hirakawa K, Yoshida M, Nagatsu A, Mizukami H, Rana V, Rawat MSM, Oikawa S, Kawanishi S. Chemopreventive Action of Xanthone Derivatives on Photosensitized DNA Damage¶. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2005.tb00189.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lai YL, Lin JC, Yang SF, Liu TY, Hung SL. Areca nut extracts reduce the intracellular reactive oxygen species and release of myeloperoxidase by human polymorphonuclear leukocytes. J Periodontal Res 2007; 42:69-76. [PMID: 17214642 DOI: 10.1111/j.1600-0765.2006.00917.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE Polymorphonuclear leukocytes (PMN) represent the first line of host defense. Areca nut extract inhibits the bactericidal activity of, and the release of superoxide anion (O2- ) by, PMN. This study investigated the effects of areca nut extract on the intracellular production of reactive oxygen species (ROS) and on the extracellular release of lysosomal enzyme, myeloperoxidase (MPO), by PMN. The effects of arecoline, a principal component of areca nut, were also examined. MATERIAL AND METHODS Human PMN were treated with various concentrations of areca nut extract or arecoline followed by treatment with Hanks' balanced salt solution, with or without cytochalasin B and fMet-Leu-Phe (CB/fMLP). The viability of PMN was determined using propidium iodide staining and flow cytometry. The presence of intracellular ROS was determined using 2',7'-dichlorofluorescin diacetate and fluorometry. MPO release was determined using a substrate assay. RESULTS Areca nut extract (25 and 50 microg/ml) significantly decreased the viability of PMN. The intracellular levels of ROS and the extracellular release of MPO were induced in PMN by CB/fMLP. Exposure of PMN to areca nut extract (up to 25 microg/ml) or to arecoline (up to 2 mg/ml) did not directly affect the levels of ROS and MPO activity. However, under conditions that did not affect the viability of PMN, the ability of CB/fMLP to trigger production of intracellular ROS and release of MPO in human PMN was significantly suppressed by areca nut extract and arecoline. CONCLUSION Areca nut impaired the activation of PMN by CB/fMLP that might decrease the effectiveness of PMN in the host defense. Alternatively, exposure of PMN to areca nut extract could decrease the capacity of PMN to damage tissues.
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Affiliation(s)
- Y-L Lai
- Faculty of Dentistry, National Yang-Ming University, Taipei, Taiwan
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Chang LY, Wan HC, Lai YL, Liu TY, Hung SL. Enhancing Effects of Areca Nut Extracts on the Production of Interleukin-6 and Interleukin-8 by Peripheral Blood Mononuclear Cells. J Periodontol 2006; 77:1969-77. [PMID: 17209780 DOI: 10.1902/jop.2006.060039] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND The habit of chewing areca quid (AQ) has been implicated in oral pathogenesis, including periodontal disease. Little is understood about the roles of AQ in the cytokine secretion by immune cells. The study examined the effects of areca nut, the major ingredient of AQ, on the production of interleukin (IL)-6 and IL-8 by peripheral blood mononuclear cells (PBMC), the immunocompetent cells. The possible role of oxidative stress of areca nut was also examined. METHODS Extracts of ripe areca nut (rANE) and tender areca nut (tANE) were examined for their cytotoxic effects on human PBMC using the trypan blue exclusion test. The production of IL-6 and IL-8 by ANE-treated PBMC was analyzed using enzyme-linked immunosorbent assay and reverse transcription-polymerase chain reaction. Effects of an antioxidant, pyrrolidine dithiocarbamate (PDTC), on ANE-induced cytokine secretion were also studied. RESULTS At the experimental conditions, 20 micro g/ml rANE decreased cell viability significantly, whereas no significant effect of tANE (< or =80 micro g/ml) was observed. Both rANE (< or =20 micro g/ml) and tANE (< or =160 micro g/ml) significantly increased the secretion of IL-6 and IL-8 by PBMC in a dose- and time-dependent manner. The altered mRNA expression of IL-6 by rANE and tANE was also observed. Moreover, the stimulating effects of rANE on cytokine expression in PBMC could be attenuated by PDTC, suggesting that the oxidative stress of rANE may play a role. CONCLUSIONS Markedly enhancing effects of ANE on PBMC-released inflammatory cytokines might cause a sustained cytokine-rich inflammatory milieu in oral cavity of AQ chewers. These excessive cytokines from ANE-treated immune cells may impair periodontal health.
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Affiliation(s)
- Lien-Yu Chang
- Institute of Clinical Dentistry, National Yang-Ming University, Taipei, Taiwan
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Lai KC, Lee TC. Genetic damage in cultured human keratinocytes stressed by long-term exposure to areca nut extracts. Mutat Res 2006; 599:66-75. [PMID: 16488451 DOI: 10.1016/j.mrfmmm.2006.01.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2005] [Revised: 01/07/2006] [Accepted: 01/12/2006] [Indexed: 05/06/2023]
Abstract
Chewing betel quid (BQ) is a popular habit worldwide. A causal association between BQ chewing and oral cancer has been well documented. Emerging evidence indicates that sustained exposure to stress induces epigenetic reprogramming of some mammalian cells and increases the mutation rate to accelerate adaptation to stressful environments. In this study, we first confirmed that 24-h treatment with areca nut extracts (ANE; a major component of BQ) at doses over 40 microg/ml induced mutations at the hypoxanthine phosphoribisyltransferase (HPRT) locus in human keratinocytes (HaCaT cells). We then investigated whether the stress of long-term exposure to sublethal doses of ANE (0, 5 and 20 microg/ml for 35 passages) could enhance genetic damage to HaCaT cells. Compared to cells exposed to 0 or 5 microg/ml ANE, cells exposed to 20 microg/ml ANE were slightly but significantly more resistant to a 72-h treatment with ANE and its major ingredients, arecoline and arecaidine, but did not develop cross-resistance to other BQ ingredients or alcohol. The cells that received 20 microg/ml ANE for 35 passages also had a significantly increased mutation frequency at the HPRT locus and an increased frequency in the appearance of micronuclei compared to lower doses. Moreover, increased intracellular levels of reactive oxygen species and 8-hydroxyguanosine in cells exposed to 20 microg/ml ANE suggested that long-term ANE exposure results in the accumulation of oxidative damage. However, cells subjected to long-term treatment of 20 microg/ml ANE contained higher levels of glutathione than unexposed cells. Therefore, after long-term exposure to sublethal doses of ANE, intracellular antioxidative activity may also be enhanced in response to increased oxidative stress. These results suggest that stress caused by long-term ANE exposure enhances oxidative stress and genetic damage in human keratinocytes.
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Affiliation(s)
- Kuo-Chu Lai
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan, ROC
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Chen PH, Tsai CC, Lin YC, Ko YC, Yang YH, Shieh TY, Ho PS, Li CM, Min-Shan Ko A, Chen CH. Ingredients contribute to variation in production of reactive oxygen species by areca quid. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2006; 69:1055-69. [PMID: 16840253 DOI: 10.1080/15287390500360224] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Areca quid (AQ) chewing has been implicated an independent risk factor for the development of oral cancer. Taiwanese areca quid (AQ) refers to a combination of areca nut (AN), lime, and inflorescence of Piper betle Linn. (IPB) or Piper betle leaf (PBL). Studies of AQ in other countries reported that AN extract combined with lime generates reactive oxygen species (ROS), such as hydroxyl radical (HO.), known to be a contributing factor in oral mucosa damage. To determine whether HO. is formed in the oral cavity during AQ chewing, the formation of meta-tyrosine (m-Tyr) and ortho-tyrosine (o-Tyr) from l-phenylalanine (Phe) was confirmed. It was demonstrated that combined aqueous extracts of AN, lime, metal ions (such as Cu2+ and Fe2+), and IPB or PBL produced HO.. Thus, the yield of HO. significantly increases when higher amounts of IPB or lime are added and also when Cu2+ and Fe2+ are increased. Further, the omission of any one of these ingredients significantly reduces the formation of HO.. Our results found that chewing AQ with IPB generated significantly higher HO. than chewing AQ with PBL, and may result in greater oxidative damage to the surrounding oral mucosa.
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Affiliation(s)
- Ping-Ho Chen
- Graduate Institute of Dental Sciences, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Lièvre A, Blons H, Houllier AM, Laccourreye O, Brasnu D, Beaune P, Laurent-Puig P. Clinicopathological significance of mitochondrial D-Loop mutations in head and neck carcinoma. Br J Cancer 2006; 94:692-7. [PMID: 16495928 PMCID: PMC2361200 DOI: 10.1038/sj.bjc.6602993] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Mitochondrial DNA mutations have been reported in several types of tumours, including head and neck squamous cell carcinoma (HNSCC). The noncoding region of the Displacement-Loop (D-Loop) has emerged as a mutational hotspot and we recently found that they were associated with prognosis and response to 5 fluorouracil (5FU) in colon cancers. In order to evaluate the frequence of D-Loop mutations in a large series of HNSCC and establish correlations with clinicopathologic parameters, we sequenced the D-Loop of 109 HNSCC before a treatment by neoadjuvant 5FU-cisplatin-based chemotherapy and surgery. Then, we correlated these mutations with prognosis and response to chemotherapy. A D-Loop mutation was identified in 21% of the tumors, the majority of them were located in a C-tract (D310). The prevalence of D310 mutations increased significantly with the number of cytosines in the matched normal tissue sequence (P=0.02). Hypopharyngeal cancer was significantly more frequent (P=0.03) and tobacco consumption more important (P=0.01) in the group of patients with D-Loop mutation. The presence of D-Loop mutation was not associated with prognosis or with response to neoadjuvant chemotherapy. These results suggest that D-Loop mutations should be considered as a cancer biomarker that may be useful for the early detection of HNSCC in individuals at risk of this cancer.
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Affiliation(s)
- A Lièvre
- INSERM, U490, Université René Descartes, Paris F-75006, France
| | - H Blons
- INSERM, U490, Université René Descartes, Paris F-75006, France
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, pôle biologie, Paris F-75015, France
| | - A M Houllier
- INSERM, U490, Université René Descartes, Paris F-75006, France
| | - O Laccourreye
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, service d'Oto-Rhino-Laryngologie et de Chirurgie cervico-faciale, Paris F-75015, France
| | - D Brasnu
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, service d'Oto-Rhino-Laryngologie et de Chirurgie cervico-faciale, Paris F-75015, France
| | - P Beaune
- INSERM, U490, Université René Descartes, Paris F-75006, France
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, pôle biologie, Paris F-75015, France
| | - P Laurent-Puig
- INSERM, U490, Université René Descartes, Paris F-75006, France
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, pôle biologie, Paris F-75015, France
- INSERM U490, Université René Descartes, 45 rue des Saints-Pères 75006, Paris, France; E-mail:
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Hung SL, Lee YY, Liu TY, Peng JL, Cheng YY, Chen YT. Modulation of Phagocytosis, Chemotaxis, and Adhesion of Neutrophils by Areca Nut Extracts. J Periodontol 2006; 77:579-85. [PMID: 16584337 DOI: 10.1902/jop.2006.050217] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND A higher prevalence of periodontal diseases among areca chewers than non-areca chewers has been demonstrated. Neutrophils, representing the first line of the host defense mechanism against microbial infection, play important roles in maintaining periodontal health. This study determined the possible effects of areca nut on phagocytosis, chemotaxis, and adhesion of human neutrophils. METHODS Aqueous extracts of ripe areca nut without husk (rANE) and fresh and tender areca nut with husk (tANE) were examined for their effects on neutrophil phagocytosis using flow cytometry and confocal laser scanning microscopy. The effects of rANE and tANE on chemotaxis and adhesion of neutrophils to human aortic endothelial cells were examined using fluorescence-labeled neutrophils. RESULTS Both rANE and tANE inhibited the phagocytic activity of neutrophils in a dose-dependent manner. The levels of internalized fluorescent bacteria in neutrophils decreased after ANE treatment. However, exposure of neutrophils to rANE and tANE stimulated the chemotaxis activity of neutrophils to N-formyl-Met-Leu-Phe (fMLP) and enhanced adhesion of neutrophils to human aortic endothelial cells in a dose-dependent manner. Moreover, treatment of neutrophils with rANE was more effective than incubation with tANE. CONCLUSIONS Components of areca nut inhibited phagocytosis activity of neutrophils but enhanced chemotaxis and adhesion of neutrophils. Alterations in functions of neutrophils may lead to signs of clinical diseases associated with areca chewing. The components in ANEs that are responsible for these observations remain to be elucidated.
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Affiliation(s)
- Shan-Ling Hung
- Institute of Oral Biology, National Yang-Ming University, Taipei, Taiwan
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Karincaoglu Y, Batcioglu K, Erdem T, Esrefoglu M, Genc M. The levels of plasma and salivary antioxidants in the patient with recurrent aphthous stomatitis. J Oral Pathol Med 2005; 34:7-12. [PMID: 15610400 DOI: 10.1111/j.1600-0714.2004.00253.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Despite plenty of research, the cause of recurrent aphthous stomatitis (RAS) remains obscure. It has been proposed that, the aetiological factors such as local trauma, smoking, vitamin deficiencies and viral infections lead to aphthae formation via final common pathway based on increased oxidative stress. The aim of this investigation was to evaluate the antioxidant enzyme superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSHPx) alterations in plasma and saliva, and in addition uric acid (UA) in saliva, in patients with RAS and healthy controls. METHODS Thirty-two patients with RAS and 30 healthy controls were included into the study. The SOD, CAT, GSHPx and UA levels were measured in plasma and saliva in study and control groups. RESULTS In the RAS group, although the mean SOD (P<0.001) and CAT (P<0.05) levels of plasma were lower, GSHPx (P<0.001) levels were higher than control group. The salivary concentrations of the SOD (P<0.001), CAT (P<0.05) and GSHPx (P<0.001) in RAS group were entirely opposite to plasma concentrations. UA were not significant between RAS group and controls. CONCLUSION Since we found salivary SOD and CAT levels were high whereas plasma levels were low, it has been thought that, salivary defence mechanisms via antioxidant agents may be stimulated against to the ulcerous lesion. We consider that the organism might mobilize the antioxidant potential to the sites where they were needed. At this point, decrease of SOD and CAT levels in the plasma may be related to this shift. It is also thought that GSHPx secretion in the saliva may also be increased but the increase in its turnover may be responsible for the diminished activity.
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Affiliation(s)
- Yelda Karincaoglu
- Department of Dermatology, Inonu University, Faculty of Medicine, Turgut Ozal Medical Center, Malatya, Turkey.
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Ling LJ, Ho FC, Chen YT, Holborow DW, Liu TY, Hung SL. Areca nut extracts modulated expression of alkaline phosphatase and receptor activator of nuclear factor kappaB ligand in osteoblasts. J Clin Periodontol 2005; 32:353-9. [PMID: 15811051 DOI: 10.1111/j.1600-051x.2005.00687.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Areca chewers have a higher prevalence of periodontal diseases than non-chewers. This study was to determine the possible effects of ripe areca nut extracts (rANE) on viability and gene expression of alkaline phosphatase (ALP), receptor activator of nuclear factor-kappaB ligand (RANKL) and osteoprotegerin (OPG) in human osteoblasts. METHODS The effects of rANE on cell viability of osteoblast-like MG63 cells were determined using 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyltetrazolium bromide (MTT) that measures metabolic activity. Gene expression of ALP, RANKL and OPG was examined using reverse transcription-polymerase chain reaction. ALP activity and RANKL protein were further examined using substrate assay and confocal laser scanning microscopy, respectively. RESULTS Relative viability was reduced to approximately 50% when 25 microg/ml of rANE was used. The expression of OPG mRNA in MG63 cells was not altered by rANE. However, decreased levels of mRNA and enzyme activity of ALP were observed. Moreover, the expressions of mRNA and protein of RANKL were stimulated by rANE in a dose-dependent manner. CONCLUSIONS The rANE affected morphology and viability of osteoblasts. We also present novel evidence demonstrating that areca nut may compromise the periodontal health of areca chewers by suppression of ALP gene expression and elevation of RANKL gene expression in osteoblasts.
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Affiliation(s)
- Li-Jane Ling
- Faculty of Dentistry, National Yang-Ming University, Taipei, Taiwan
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Hung SL, Cheng YY, Peng JL, Chang LY, Liu TY, Chen YT. Inhibitory Effects of Areca Nut Extracts on Phagocytosis ofActinobacillus actinomycetemcomitansATCC 33384 by Neutrophils. J Periodontol 2005; 76:373-9. [PMID: 15857070 DOI: 10.1902/jop.2005.76.3.373] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Areca quid chewers have a higher prevalence of periodontal disease than non-chewers. Little is known about the influence of areca quid on the immune system. This study was to determine the possible effects of the areca nut on phagocytic activity of human neutrophils. METHODS Aqueous extracts of ripe areca nut without husk (rANE), fresh and tender areca nut with husk (tANE), a major alkaloid (arecoline), and a phenolic component ([+]-catechin) of areca nut were examined for their effects on cellular viability using trypan blue exclusion assay. The possible effects on the phagocytic activity of neutrophils against a periodontal pathogen, Actinobacillus actinomycetemcomitans ATCC 33384, were determined using flow cytometry and confocal laser scanning microscopy. RESULTS At the concentrations tested, rANE, tANE, arecoline, and (+)-catechin did not significantly affect viability of neutrophils. However, rANE, tANE, arecoline, and (+)-catechin inhibited the phagocytic activity of neutrophils in a dose-dependent manner. Approximately 50% of the relative phagocytic activity of neutrophils was affected when 50 microg/ml of rANE, 400 microg/ml of tANE, 20,000 microg/ml of arecoline, or 2,500 microg/ml of (+)- catechin was used. Decreased levels of internalized fluorescent bacteria were also demonstrated. However, arecoline or (+)-catechin alone could not be used to explain the inhibitory effects observed for rANE and tANE. CONCLUSIONS Components of areca nut reduced the uptake of A. actinomycetemcomitans ATCC 33384 by human neutrophils. The inhibition of areca nut on phagocytosis of neutrophils may be one possible mechanism by which the areca nut compromises the periodontal health of areca quid chewers.
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Affiliation(s)
- Shan-Ling Hung
- Institute of Oral Biology, National Yang-Ming University, Taipei, Taiwan
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