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Miao Y, Zhao L, Lei S, Zhao C, Wang Q, Tan C, Peng C, Gong J. Caffeine regulates both osteoclast and osteoblast differentiation via the AKT, NF-κB, and MAPK pathways. Front Pharmacol 2024; 15:1405173. [PMID: 38939843 PMCID: PMC11208461 DOI: 10.3389/fphar.2024.1405173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 05/24/2024] [Indexed: 06/29/2024] Open
Abstract
Background: Although caffeine generally offers benefits to human health, its impact on bone metabolism remains unclear. Aim and Methods: This study aimed to systematically evaluate the long-term effects of caffeine administration on osteoclasts, osteoblasts, and ovariectomy-induced postmenopausal osteoporosis (OP). Results: Our in vitro findings revealed that 3.125 and 12.5 μg/mL caffeine inhibited RANKL-mediated osteoclastogenesis in RAW 264.7 cells through the MAPK and NF-κB pathways, accompanied by the inactivation of nuclear translocation of nuclear factor NFATc1. Similarly, 3.125 and 12.5 μg/mL of caffeine modulated MC3T3-E1 osteogenesis via the AKT, MAPK, and NF-κB pathways. However, 50 μg/mL of caffeine promoted the phosphorylation of IκBα, P65, JNK, P38, and AKT, followed by the activation of NFATc1 and the inactivation of Runx2 and Osterix, ultimately disrupting the balance between osteoblastogenesis and osteoclastogenesis. In vivo studies showed that gavage with 55.44 mg/kg caffeine inhibited osteoclastogenesis, promoted osteogenesis, and ameliorated bone loss in ovariectomized mice. Conclusion: Conversely, long-term intake of high-dose caffeine (110.88 mg/kg) disrupted osteogenesis activity and promoted osteoclastogenesis, thereby disturbing bone homeostasis. Collectively, these findings suggest that a moderate caffeine intake (approximately 400 mg in humans) can regulate bone homeostasis by influencing both osteoclasts and osteoblasts. However, long-term high-dose caffeine consumption (approximately 800 mg in humans) could have detrimental effects on the skeletal system.
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Affiliation(s)
- Yue Miao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, Yunnan, China
- Medicinal Plants Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China
| | - Lei Zhao
- College of Science, Yunnan Agricultural University, Kunming, China
| | - Shuwen Lei
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Chunyan Zhao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Qiuping Wang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Chao Tan
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Chunxiu Peng
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, China
| | - Jiashun Gong
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, Yunnan, China
- Agro-Products Processing Research Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
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Dertinger SD, Briggs E, Hussien Y, Bryce SM, Avlasevich SL, Conrad A, Johnson GE, Williams A, Bemis JC. Visualization strategies to aid interpretation of high-dimensional genotoxicity data. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2024; 65:156-178. [PMID: 38757760 PMCID: PMC11178453 DOI: 10.1002/em.22604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/18/2024]
Abstract
This article describes a range of high-dimensional data visualization strategies that we have explored for their ability to complement machine learning algorithm predictions derived from MultiFlow® assay results. For this exercise, we focused on seven biomarker responses resulting from the exposure of TK6 cells to each of 126 diverse chemicals over a range of concentrations. Obviously, challenges associated with visualizing seven biomarker responses were further complicated whenever there was a desire to represent the entire 126 chemical data set as opposed to results from a single chemical. Scatter plots, spider plots, parallel coordinate plots, hierarchical clustering, principal component analysis, toxicological prioritization index, multidimensional scaling, t-distributed stochastic neighbor embedding, and uniform manifold approximation and projection are each considered in turn. Our report provides a comparative analysis of these techniques. In an era where multiplexed assays and machine learning algorithms are becoming the norm, stakeholders should find some of these visualization strategies useful for efficiently and effectively interpreting their high-dimensional data.
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Affiliation(s)
| | | | - Yusuf Hussien
- Institute of Life Sciences, Swansea University, Swansea, UK
| | | | | | - Adam Conrad
- Litron Laboratories, Rochester, New York, USA
| | | | - Andrew Williams
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, Canada
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Impellitteri F, Briglia M, Porcino C, Stoliar O, Yunko K, Germanà A, Piccione G, Faggio C, Guerrera MC. The odd couple: Caffeine and microplastics. Morphological and physiological changes in Mytilus galloprovincialis. Microsc Res Tech 2024; 87:1092-1110. [PMID: 38251430 DOI: 10.1002/jemt.24483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/29/2023] [Accepted: 12/16/2023] [Indexed: 01/23/2024]
Abstract
In recent years, the presence of pharmaceuticals and microplastics (MPs) in aquatic ecosystems has raised concerns about their environmental impact. This study explores the combined effects of caffeine, a common pharmaceutical pollutant, and MPs on the marine mussel Mytilus galloprovincialis. Caffeine, at concentrations of 20.0 μg L-1, and MPs (1 mg L-1, 35-50 μm size range), was used to mimic real-world exposure scenarios. Two hundred M. galloprovincialis specimens were divided into four groups: caffeine, MPs, Mix (caffeine + MPs), and Control. After a two-week acclimation period, the mollusks were subjected to these pollutants in oxygen-aerated aquariums under controlled conditions for 14 days. Histopathological assessments were performed to evaluate gill morphology. Cellular volume regulation and digestive gland cell viability were also analyzed. Exposure to caffeine and MPs induced significant morphological changes in M. galloprovincialis gills, including cilia loss, ciliary disk damage, and cellular alterations. The chitinous rod supporting filaments also suffered damage, potentially due to MP interactions, leading to hemocyte infiltration and filament integrity compromise. Hemocytic aggregation suggested an inflammatory response to caffeine. In addition, viability assessments of digestive gland cells revealed potential damage to cell membranes and function, with impaired cell volume regulation, particularly in the Mix group, raising concerns about nutrient metabolism disruption and organ function compromise. These findings underscore the vulnerability of M. galloprovincialis to environmental pollutants and emphasize the need for monitoring and mitigation efforts. RESEARCH HIGHLIGHTS: The synergy of caffeine and microplastics (MPs) in aquatic ecosystems warrants investigation. MPs and caffeine could affect gill morphology of Mytilus galloprovincialis. Caffeine-exposed cells had lower viability than the control group in the NR retention test. MPs and mix-exposed cells struggled to recover their volume.
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Affiliation(s)
| | - Marilena Briglia
- Department of Veterinary Sciences, Zebrafish Neuromorphology Lab, University of Messina, Messina, Italy
| | - Caterina Porcino
- Department of Veterinary Sciences, Zebrafish Neuromorphology Lab, University of Messina, Messina, Italy
| | - Oksana Stoliar
- Ternopil Volodymyr Hnatiuk National Pedagogical University, Ternopil, Ukraine
| | - Katerina Yunko
- Ternopil Volodymyr Hnatiuk National Pedagogical University, Ternopil, Ukraine
| | - Antonino Germanà
- Department of Veterinary Sciences, Zebrafish Neuromorphology Lab, University of Messina, Messina, Italy
| | - Giuseppe Piccione
- Department of Veterinary Sciences, University of Messina, Messina, Italy
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Maria Cristina Guerrera
- Department of Veterinary Sciences, Zebrafish Neuromorphology Lab, University of Messina, Messina, Italy
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Park SS, Zaman T, Kim SJ, Brooks JD, Wong AKO, Lubiński J, Narod SA, Salmena L, Kotsopoulos J. Correlates of Circulating Osteoprotegerin in Women with a Pathogenic or Likely Pathogenic Variant in the BRCA1 Gene. Cancer Epidemiol Biomarkers Prev 2024; 33:298-305. [PMID: 38015775 DOI: 10.1158/1055-9965.epi-23-0577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 07/28/2023] [Accepted: 11/20/2023] [Indexed: 11/30/2023] Open
Abstract
BACKGROUND Lower levels of osteoprotegerin (OPG), the decoy receptor for receptor activator of NFκB (RANK)-ligand, have been reported among women with a BRCA1 mutation, suggesting OPG may be marker of cancer risk. Whether various reproductive, hormonal, or lifestyle factors impact OPG levels in these women is unknown. METHODS BRCA1 mutation carriers enrolled in a longitudinal study, no history of cancer, and a serum sample for OPG quantification, were included. Exposure information was collected through self-reported questionnaire at study enrollment and every 2 years thereafter. Serum OPG levels (pg/mL) were measured using an ELISA, and generalized linear models were used to assess the associations between reproductive, hormonal, and lifestyle exposures at the time of blood collection with serum OPG. Adjusted means were estimated using the fully adjusted model. RESULTS A total of 701 women with a median age at blood collection of 39.0 years (18.0-82.0) were included. Older age (Spearman r = 0.24; P < 0.001) and current versus never smoking (98.82 vs. 86.24 pg/mL; Pcat < 0.001) were associated with significantly higher OPG, whereas ever versus never coffee consumption was associated with significantly lower OPG (85.92 vs. 94.05 pg/mL; Pcat = 0.03). There were no other significant associations for other exposures (P ≥ 0.06). The evaluated factors accounted for 7.5% of the variability in OPG. CONCLUSIONS OPG is minimally influenced by hormonal and lifestyle factors among BRCA1 mutation carriers. IMPACT These findings suggest that circulating OPG levels are not impacted by non-genetic factors in high-risk women.
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Affiliation(s)
- Sarah Sohyun Park
- Department of Nutritional Sciences, Temerty Faculty of Medicine, University of Toronto, Toronto, Canada
- Women's College Research Institute, Women's College Hospital, Toronto, Canada
| | - Tasnim Zaman
- Women's College Research Institute, Women's College Hospital, Toronto, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Canada
| | - Shana J Kim
- Women's College Research Institute, Women's College Hospital, Toronto, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Canada
| | - Jennifer D Brooks
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Andy Kin On Wong
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
- Joint Department of Medical Imaging, University Health Network, Toronto, Canada
- Osteoporosis Program, Schroeder Arthritis Institute, University Health Network, Toronto, Canada
| | - Jan Lubiński
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
- Read-Gene S.A., Grzepnica, Poland
| | - Steven A Narod
- Women's College Research Institute, Women's College Hospital, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Leonardo Salmena
- Women's College Research Institute, Women's College Hospital, Toronto, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Joanne Kotsopoulos
- Women's College Research Institute, Women's College Hospital, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
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Lee SJ, Park SY, Bak S, Lee MW, Lim DJ, Kim HD, Kim DG, Kim SW. Synergistic Effect of Saccharin and Caffeine on Antiproliferative Activity in Human Ovarian Carcinoma Ovcar-3 Cells. Int J Mol Sci 2023; 24:14445. [PMID: 37833894 PMCID: PMC10572161 DOI: 10.3390/ijms241914445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/12/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023] Open
Abstract
The purpose of this study was to confirm the antiproliferative and apoptotic induction potential of a saccharin and caffeine combination in ovarian cancer cells. The cell line used was Ovcar-3, and the cell viability was measured through a WST-8 assay, while a Chou-Talalay assay was used to confirm the synergistic effect of saccharin and caffeine on the ovarian cancer cells. A clonogenic assay, annexin V-FITC/PI-PE double-staining, and RT-PCR were performed to confirm the expression of genes that induce colony formation, cell viability, and apoptosis in ovarian cancer cells treated with the saccharin-caffeine combination. It was demonstrated that both saccharin and caffeine decreased the viability of Ovcar-3 cells, and the cell viability decreased even more significantly when the cells were treated with the combination of saccharin and caffeine. The clonogenic assay results showed that the number of colonies decreased the most when saccharin and caffeine were combined, and the number of colonies also significantly decreased compared to the single-treatment groups. Based on flow cytometry analysis using annexin V-FITC/PI-PE double-staining, it was confirmed that the decrease in cell viability caused by the combination of saccharin and caffeine was correlated with the induction of apoptosis. The results of the RT-PCR confirmed that the combined treatment of saccharin and caffeine promoted cell apoptosis by regulating the expression of apoptosis-inducing genes. These results demonstrate that the combination of saccharin and caffeine more efficiently inhibits the proliferation of Ovcar-3 cells and induces apoptosis in vitro.
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Affiliation(s)
- Sun Ju Lee
- Department of Health and Safety Convergence Science, Graduate School, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea (D.J.L.)
- BK21 FOUR R&E Center for Learning Health Systems, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Sang-Yong Park
- Department of Health and Safety Convergence Science, Graduate School, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea (D.J.L.)
| | - Subin Bak
- Department of Health and Safety Convergence Science, Graduate School, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea (D.J.L.)
| | - Min-Woo Lee
- Department of Health and Safety Convergence Science, Graduate School, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea (D.J.L.)
| | - Dae Jin Lim
- Department of Health and Safety Convergence Science, Graduate School, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea (D.J.L.)
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Seoul 06351, Republic of Korea
| | - Hyeong-Dong Kim
- Department of Health and Safety Convergence Science, Graduate School, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea (D.J.L.)
| | - Dong-Gil Kim
- Kyung-In Synthetic Corporation, 572 Gonghang-daero, Seoul 07947, Republic of Korea
| | - Suhng Wook Kim
- Department of Health and Safety Convergence Science, Graduate School, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea (D.J.L.)
- BK21 FOUR R&E Center for Learning Health Systems, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
- Graduate School of Particulate Matter Specialization, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
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Ismail RIH, Awad HA, Saber M, Shehata BM. Bone mineral content for preterm neonates treated with caffeine using dual energy X-ray absorptiometry: An observational study. J Neonatal Perinatal Med 2023; 16:129-135. [PMID: 36872800 DOI: 10.3233/npm-221172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
BACKGROUND Prematurity is associated with lots of comorbidities. Premature neonates also have lower bone mineral content (BMC) compared to term neonates. Apnea of prematurity is a common complication and caffeine citrate is widely used for its prevention and treatment. Caffeine also affects creatinine clearance, urine flow rate and releases calcium from its storage sites. OBJECTIVES The primary objective was to assess BMC in preterm neonates treated with caffeine using dual energy X-ray absorptiometry (DEXA). Secondary objectives were to determine whether caffeine therapy is associated with increased incidence of nephrocalcinosis or bone fracture. METHODS Prospective observational study on 42 preterm neonates, 34 weeks' gestation or less; 22 of them received intravenous caffeine (caffeine group) and 20 did not (control group). Serum levels of calcium, phosphorus, alkaline phosphatase, magnesium, sodium, potassium, and creatinine, abdominal ultrasonography, and DEXA scan were done for all included neonates. RESULTS BMC showed significant lower levels in the caffeine compared to control group (p = 0.017). Additionally, BMC was significantly lower in neonates who received caffeine for more than 14 days compared to those who received it for 14 days or less(p = 0.04). BMC showed significant positive correlation to birth weight, gestational age, serum P and significant negative correlation to serum ALP. Caffeine therapy duration was negatively correlated to BMC (r = -0.370, p = 0.000) and positively correlated to serum ALP levels (r = 0.667, p = 0.001). None of the neonates had nephrocalcinosis. CONCLUSIONS Caffeine administration for more than 14 days in preterm neonates may be associated with lower BMC but not nephrocalcinosis or bone fracture.
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Affiliation(s)
- R I H Ismail
- Department of Pediatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - H A Awad
- Department of Pediatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - M Saber
- Ministry of Health, Cairo, Egypt
| | - B M Shehata
- Department of Pediatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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Mitra S, Dash R, Munni YA, Selsi NJ, Akter N, Uddin MN, Mazumder K, Moon IS. Natural Products Targeting Hsp90 for a Concurrent Strategy in Glioblastoma and Neurodegeneration. Metabolites 2022; 12:1153. [PMID: 36422293 PMCID: PMC9697676 DOI: 10.3390/metabo12111153] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/16/2022] [Accepted: 11/16/2022] [Indexed: 09/16/2023] Open
Abstract
Glioblastoma multiforme (GBM) is one of the most common aggressive, resistant, and invasive primary brain tumors that share neurodegenerative actions, resembling many neurodegenerative diseases. Although multiple conventional approaches, including chemoradiation, are more frequent in GBM therapy, these approaches are ineffective in extending the mean survival rate and are associated with various side effects, including neurodegeneration. This review proposes an alternative strategy for managing GBM and neurodegeneration by targeting heat shock protein 90 (Hsp90). Hsp90 is a well-known molecular chaperone that plays essential roles in maintaining and stabilizing protein folding to degradation in protein homeostasis and modulates signaling in cancer and neurodegeneration by regulating many client protein substrates. The therapeutic benefits of Hsp90 inhibition are well-known for several malignancies, and recent evidence highlights that Hsp90 inhibitors potentially inhibit the aggressiveness of GBM, increasing the sensitivity of conventional treatment and providing neuroprotection in various neurodegenerative diseases. Herein, the overview of Hsp90 modulation in GBM and neurodegeneration progress has been discussed with a summary of recent outcomes on Hsp90 inhibition in various GBM models and neurodegeneration. Particular emphasis is also given to natural Hsp90 inhibitors that have been evidenced to show dual protection in both GBM and neurodegeneration.
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Affiliation(s)
- Sarmistha Mitra
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| | - Raju Dash
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| | - Yeasmin Akter Munni
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
| | - Nusrat Jahan Selsi
- Product Development Department, Popular Pharmaceuticals Ltd., Dhaka 1207, Bangladesh
| | - Nasrin Akter
- Department of Clinical Pharmacy and Molecular Pharmacology, East West University Bangladesh, Dhaka 1212, Bangladesh
| | - Md Nazim Uddin
- Department of Pharmacy, Southern University Bangladesh, Chittagong 4000, Bangladesh
| | - Kishor Mazumder
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh
- School of Optometry and Vision Science, UNSW Medicine, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Il Soo Moon
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju 38066, Republic of Korea
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Zeng X, Su Y, Tan A, Zou L, Zha W, Yi S, Lv Y, Kwok T. The association of coffee consumption with the risk of osteoporosis and fractures: a systematic review and meta-analysis. Osteoporos Int 2022; 33:1871-1893. [PMID: 35426508 DOI: 10.1007/s00198-022-06399-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 04/04/2022] [Indexed: 01/11/2023]
Abstract
UNLABELLED To elucidate the association of coffee and bone health would help fracture risk reduction via dietary intervention. Although those who had higher coffee consumption were less likely to have osteoporosis, the associations between coffee consumption and fracture risk need further investigations with better study designs. INTRODUCTION The associations between coffee consumption and the risk of osteoporosis and fracture remain inconclusive. We aimed to better quantify these associations by conducting meta-analyses of observational studies. METHODS Relevant studies were systematically searched on PubMed, Web of Science, Cochrane library, and Embase Database up to November 25, 2021. The odds ratio (OR) or relative risk (RR) with 95% confidence intervals (CI) was pooled and a dose-response analysis was performed. RESULTS Four studies with 7114 participants for osteoporosis and thirteen studies with 391,956 participants for fracture incidence were included in the meta-analyses. High versus low coffee consumption was associated with a lower risk of osteoporosis [pooled OR (95% CI): 0.79 (0.65-0.92)], while it was non-significantly associated with fracture incidence [pooled OR (95% CI): 0.86 (0.67-1.05) at hip and 0.89 (0.42-1.36) at non-hip]. A non-linear association between the level of coffee consumption and hip fracture incidence was shown (P = 0.004). The pooled RR (95% CI) of hip fracture risk in those who consumed 1, 2-3, 4, and ≥ 9 cups of coffee per day was 0.92 (0.87-0.97), 0.89 (0.83-0.95), 0.91 (0.85-0.98), and 1.10 (0.76-1.59), respectively. The significance in the association between coffee consumption and the hip fracture incidence decreased in those studies that had larger sample size, higher quality, and more adjustments. CONCLUSIONS A dose-dependent relationship may exist between coffee consumption and hip fracture incidence. The effect of high versus low coffee consumption was influenced by study designs. Further studies with dedicated designs are needed to confirm the independent effects of coffee consumption on bone health.
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Affiliation(s)
- X Zeng
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, 371 Tongzipo Road, Yuelu District, Changsha, 410000, China
| | - Y Su
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, 371 Tongzipo Road, Yuelu District, Changsha, 410000, China.
| | - A Tan
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, 371 Tongzipo Road, Yuelu District, Changsha, 410000, China
| | - L Zou
- Hunan Provincial Institute of Emergency Medicine, Hunan Provincial People's Hospital, Changsha, China
| | - W Zha
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, 371 Tongzipo Road, Yuelu District, Changsha, 410000, China
| | - S Yi
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, 371 Tongzipo Road, Yuelu District, Changsha, 410000, China
| | - Y Lv
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, 371 Tongzipo Road, Yuelu District, Changsha, 410000, China.
| | - T Kwok
- Department of Medicine & Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China
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Félix L, Lobato-Freitas C, Monteiro SM, Venâncio C. 24-Epibrassinolide modulates the neurodevelopmental outcomes of high caffeine exposure in zebrafish (Danio rerio) embryos. Comp Biochem Physiol C Toxicol Pharmacol 2021; 249:109143. [PMID: 34284067 DOI: 10.1016/j.cbpc.2021.109143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 10/20/2022]
Abstract
Previous embryonic fish data have shown caffeine to induce potential teratogenic and long-term neurodevelopmental outcomes through oxidative stress-mediated apoptosis. In this context, antioxidants may have the potential to counteract the caffeine-induced effects. Therefore, the present study aimed to investigate the potential protective role of 24-epibrassinolide (24-EPI), a natural brassinosteroid with proven antioxidant properties, against caffeine-induced teratogenic effects during early zebrafish development. Embryos (~2 h post-fertilization - hpf) were exposed to 0.5 mM caffeine, co-exposed to 24-EPI (0.01, 0.1 and 1 μM) and to 24-EPI alone (1 μM) for 96 h. During exposure, lethal and sublethal developmental parameters were evaluated. At the end of the exposure, biochemical evaluations were made, and 24 h after, different behavioural paradigms were assessed. An increased number of animals showing oedema and malformations were observed after caffeine exposure, while these were reduced after co-exposure to 24-EPI concentration, namely the tail curvature. The results showed oxidative stress and related parameters similar among treatments. Yet, caffeine exposure resulted in locomotor deficits (decreased speed and distance) and disrupted anxiety-like and avoidance responses. The co-exposure to caffeine and to the highest 24-EPI concentrations resulted in less pronounced behavioural deficits. Overall, there was an absence of effects in the embryo/larvae exposed solely to 24-EPI, while caffeine caused developmental and neurotoxic effects. Although further studies are needed, the results showed promising protective effects of the highest 24-EPI concentration tested against the toxicity induced by caffeine in zebrafish.
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Affiliation(s)
- Luís Félix
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro- Institute for Innovation, Capacity Building and Sustainability of Agri-food Production. University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal; Institute for Research and Innovation in Health (i3s), Laboratory Animal Science (LAS), Institute of Molecular and Cell Biology (IBMC), University of Porto (UP), Porto, Portugal.
| | - Carolina Lobato-Freitas
- Life Sciences and Environment School (ECVA), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
| | - Sandra M Monteiro
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro- Institute for Innovation, Capacity Building and Sustainability of Agri-food Production. University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal; Life Sciences and Environment School (ECVA), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
| | - Carlos Venâncio
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro- Institute for Innovation, Capacity Building and Sustainability of Agri-food Production. University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal; Veterinary and Animal Science Research Center (CECAV), University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal; Department of Animal Science, School of Agrarian and Veterinary Sciences (ECAV), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
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10
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The association between coffee consumption and periodontitis: a cross-sectional study of a northern German population. Clin Oral Investig 2021; 26:2421-2427. [PMID: 34618231 PMCID: PMC8898214 DOI: 10.1007/s00784-021-04208-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 09/24/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND Positive and negative influences on oral health are attributed to coffee consumption. The aim of the current study is to evaluate the association between coffee consumption and periodontitis in the general population of Hamburg. METHODS A total of 6,209 participants from the Hamburg City Health Study were included in this cross-sectional study. Information on coffee consumption was collected using a food frequency questionnaire. Periodontal examination included assessment of dental care ability via Plaque Index, measurement of pocket depth, gingival recession, and bleeding on probing. Classification was based on the criteria of Eke and Page. Ordinal logistic regression models were performed unadjusted and adjusted for confounding variables. RESULTS Periodontal cohort consists of 6,209 participants, presenting either none/mild (n = 1,453, 39.6% men, 2.4% strong coffee drinkers), moderate (n = 3,580, 49.3% men, 3.3% strong coffee drinkers), or severe (n = 1,176, 60.9% men, 5.0% strong coffee drinkers) periodontitis. There was a significant association between strong coffee consumption (≥ 7or more cups/day) and periodontitis (OR: 1.51; CI: 1.07, 2.12; p > 0.001), compared with low coffee consumption. Conversely, moderate coffee consumption was not associated with periodontitis, compared with low coffee consumption. CONCLUSION and clinical relevance. In this cross-sectional study of a northern German population, strong coffee consumption was significantly associated with periodontitis. Influence of changes in coffee consumption on periodontal disease etiology/progression should be investigated in future prospective study designs, in order to identify strong coffee consumption as a potential risk factor of periodontitis.
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Leão TK, Ribeiro DL, Machado ART, Costa TR, Sampaio SV, Antunes LMG. Synephrine and caffeine combination promotes cytotoxicity, DNA damage and transcriptional modulation of apoptosis-related genes in human HepG2 cells. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2021; 868-869:503375. [PMID: 34454690 DOI: 10.1016/j.mrgentox.2021.503375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 07/04/2021] [Accepted: 07/07/2021] [Indexed: 11/19/2022]
Abstract
The abusive consumption of thermogenic supplements occurs worldwide and deserves special attention due to their use to stimulate weight loss and prevent obesity. Thermogenic formulations usually contain Synephrine (SN) and Caffeine (CAF), stimulating compounds extracted from natural sources, but no genetic toxicology studies have predicted this hazardous combination potential. This study examined the toxicogenomic responses induced by SN and CAF, either alone or in combination, in the human hepatic cell line HepG2 in vitro. SN (0.03-30 μM) and CAF (0.6-600 μM) alone did neither decrease cell viability nor induce DNA damage, as assessed using the MTT and comet assays, respectively. SN (3 μM) and CAF (30-600 μM) were combined at concentrations similar to those found in commercial dietary supplements. SN/CAF at 3:90 and 3:600 μM ratios significantly decreased cell viability and increased DNA damage levels in HepG2 cells. CAF (600 μM) and the SN/CAF association at 3:60, 3:90, and 3:600 μM ratios promoted cell death by apoptosis, as demonstrated by flow cytometry. Similar results were observed in gene expression (RT-qPCR): SN/CAF up-regulated the expression of apoptosis- (BCL-2 and CASP9) and DNA repair-related (XPC) genes. SN/CAF at 3:90 μM also downregulated the expression of cell cycle control (CDKN1A) genes. In conclusion, the SN/CAF combination reduces cell viability by inducing apoptosis, damages DNA, and modulates the transcriptional expression of apoptosis-, cell cycle-, and DNA repair-related genes in human hepatic (HepG2) cells in vitro. These effects can be worrisome to consumers of thermogenic supplements.
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Affiliation(s)
- Tainá Keiller Leão
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n°, CEP: 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Diego Luís Ribeiro
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes, 3900, CEP: 14040-901, Ribeirão Preto, São Paulo, Brazil
| | - Ana Rita Thomazela Machado
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n°, CEP: 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Tássia Rafaela Costa
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n°, CEP: 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Suely Vilela Sampaio
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n°, CEP: 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Lusânia Maria Greggi Antunes
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida do Café, s/n°, CEP: 14040-903, Ribeirão Preto, São Paulo, Brazil.
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Omar O, Abuohashish HM, Alkhamis T, Al-Qarni F. Habitual caffeine intake affects implant osseointegration: An in vivo study. J Periodontal Res 2021; 56:1070-1078. [PMID: 34363706 DOI: 10.1111/jre.12920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 07/27/2021] [Indexed: 01/12/2023]
Abstract
OBJECTIVES This study aimed to evaluate the effect of habitual caffeine (CAF) intake on stability, bone regeneration, and expression of bone markers at the bone-implant interface. BACKGROUND Studies show that habitual CAF alters bone health and remodeling. Yet, there is no information regarding CAF effects on osseointegration of bone-anchored implants. METHODS Wistar rats were divided into two groups: one received tap drinking water alone (control) and the other received tap water with CAF (300 mg/L). After 12 weeks, their tibiae received screw-shaped titanium implants. After another 12 weeks, CAF (n = 5) and control (n = 5) animals were sacrificed and the implant stability was evaluated using a removal torque (RTQ) device. Thereafter, the implants were processed for gene expression analysis, and the implantation sites were harvested for histology. Implants with the surrounding bone were dissected en bloc and subjected to micro-computed tomography (micro-CT). RESULTS The results showed that implants in the CAF group had an 87% significant increase in RTQ compared to the control. Further, micro-CT revealed a higher proportion of mineralized bone filling the implant threads in the CAF group. The molecular analysis indicated higher expression of bone formation (ALP), remodeling (CatK), and vascularization (VEGF) genes in implant-adherent cells in the CAF group. Histology suggested increased vascularity in the tissue surrounding the implant in the CAF group. CONCLUSIONS Within the limit of this study, it is concluded that habitual CAF intake conveys a positive, promoting effect on long-term osseointegration. Clinical studies are worth pursuing to verify this experimental observation.
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Affiliation(s)
- Omar Omar
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Hatem M Abuohashish
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Taleb Alkhamis
- Animal House, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Faisal Al-Qarni
- Department of Substitutive Dental Science, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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Dal-Fabbro R, Cosme-Silva L, Capalbo LC, Chaves-Neto AH, Ervolino E, Cintra LTA, Gomes-Filho JE. Excessive caffeine intake increases bone resorption associated with periapical periodontitis in rats. Int Endod J 2021; 54:1861-1870. [PMID: 34037986 DOI: 10.1111/iej.13578] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 12/31/2022]
Abstract
AIM To evaluate the effect of excessive caffeine intake on the inflammation/resorption processes associated with periapical periodontitis (PP) in rats. METHODOLOGY Sixteen Wistar rats were used. Periapical periodontitis was induced in the four first molars in each animal. The animals were arranged into two groups: control (C)-rats with periapical periodontitis; and caffeine (CAF)-rats with periapical periodontitis under caffeine administration protocol. The CAF animals received 10 mg/100 g of body weight/day of caffeine via gavage starting fifteen days before PP induction and continuing for thirty more days until euthanasia. On the 30th day, the animals were euthanized and the jaws removed for microcomputed tomography, histological and immunohistochemical analysis for RANKL, OPG, TRAP, IL-10, TNF-⍺ and IL-1β. The Mann-Whitney test was performed for nonparametric data, and Student's t test was performed for parametric data, using p < .05. RESULTS There was no significant difference in the weight change between the groups. The median score of the inflammatory process was significantly greater in the CAF group (3) compared with the C group (2), p = .0256. Bone resorption was greater in the group consuming caffeine (1.08 ± 0.15 mm3 ) compared with the C group (0.88 ± 0.10 mm3 ), p = .0346. The immunolabelling for RANKL, TRAP and IL-1β was significantly higher in the CAF group when compared to the control, p < .05. No differences were found for the OPG, IL-10 and TNF-⍺ immunolabelling. CONCLUSION Excessive caffeine exposure via gavage in rats was able to exacerbate the volume of periapical bone destruction, and the inflammatory pattern deriving from periapical periodontitis altering the expression of RANKL, IL-1β and TRAP.
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Affiliation(s)
- Renan Dal-Fabbro
- Department of Preventive and Restorative Dentistry, Araçatuba, Brazil
| | - Leopoldo Cosme-Silva
- Department of Restorative Dentistry and Endodontics, School of Dentistry, Federal University of Alagoas (UFAL), Alagoas, Brazil
| | | | | | - Edilson Ervolino
- Department of Basic Science, School of Dentistry, São Paulo State University (Unesp), Araçatuba, Brazil
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Ratajczak AE, Szymczak-Tomczak A, Zawada A, Rychter AM, Dobrowolska A, Krela-Kaźmierczak I. Does Drinking Coffee and Tea Affect Bone Metabolism in Patients with Inflammatory Bowel Diseases? Nutrients 2021; 13:nu13010216. [PMID: 33451170 PMCID: PMC7828660 DOI: 10.3390/nu13010216] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/07/2021] [Accepted: 01/09/2021] [Indexed: 12/16/2022] Open
Abstract
Patients suffering from Crohn’s disease and ulcerative colitis are at higher risk of osteoporosis due to lower bone mineral density. Risk factors of osteoporosis are divided into unmodifiable, namely, age, gender, genetic factors, as well as modifiable, including diet, level of physical activity, and the use of stimulants. Coffee and tea contain numerous compounds affecting bone metabolism. Certain substances such as antioxidants may protect bones; other substances may increase bone resorption. Nevertheless, the influence of coffee and tea on the development and course of inflammatory bowel diseases is contradictory.
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Affiliation(s)
- Alicja Ewa Ratajczak
- Correspondence: (A.E.R.); (I.K.-K.); Tel.: +48-667-385-996 (A.E.R.); +48-8691-343 (I.K.-K.); Fax: +48-8691-686 (A.E.R.)
| | | | | | | | | | - Iwona Krela-Kaźmierczak
- Correspondence: (A.E.R.); (I.K.-K.); Tel.: +48-667-385-996 (A.E.R.); +48-8691-343 (I.K.-K.); Fax: +48-8691-686 (A.E.R.)
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Altun Ö, Koçer MÖ. Pt(II) complex of Schiff base derived from L-phenylalanine and furfuraldehyde in the presence of 8-hydroxyquinoline: Structural analysis, composition of complex and biological activity. CR CHIM 2020. [DOI: 10.5802/crchim.9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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16
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Chen J, Tang M, Liu M, Jiang Y, Liu B, Liu S. Neferine and lianzixin extracts have protective effects on undifferentiated caffeine-damaged PC12 cells. BMC Complement Med Ther 2020; 20:76. [PMID: 32143612 PMCID: PMC7076826 DOI: 10.1186/s12906-020-2872-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 02/27/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The embryos of Nelumbo nucifera Gaertn seeds, lianzixin, are used in China as food and traditional herbal medicine. Principal therapeutic indications are insomnia, anxiety and pyrexia. Caffeine is a psychostimulant and excessive use predisposes to cell damage and neurotoxicity. We aimed to investigate the potential protect effect of Neferine and lianzixin extracts on undifferentiated caffeine-damaged phaeochromocytoma cells (PC12 cells). METHODS A cell damage model based on undifferentiated PC12 was established with caffeine. Effect of Lianzixin extracts (total alkaloids, alcohol extract and water extract) and neferine on caffeine-damaged PC12 cells was evaluated. Cell viability was assessed using the methyl thiazolyl tetrazolium (MTT) assay, cellular morphology by inverted microscope, the nucleus by Hoechst 33342 staining and cleaved poly ADP-ribose polymerase (PARP) expression by western blot analysis. RESULTS Lianzixin extracts (total alkaloids, alcohol extract and water extract) and neferine improved the viability of PC12 cells damaged by caffeine. The morphology of PC12 cells pretreated with neferine, or alcohol or water extract of lianzixin aggregated and attached better than caffeine-damaged cells, but cells pretreated with total alkaloids of lianzixin showed abnormal morphology. Compared with caffeine-damaged cells, cells pretreated with neferine, or alcohol or water extract of lianzixin showed a notable increase in nucleus staining and an obvious decrease in cleaved PARP expression. CONCLUSIONS Lianzixin extracts and neferine have protective effects against caffeine-induced damage in PC12 cells, which laid a foundation for finding a new medicine value of Lianzixin.
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Affiliation(s)
- Jingjing Chen
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Mimi Tang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Manhua Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Yueping Jiang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Bin Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Shao Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China. .,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.
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Coronado-Zarco R. Reply on "Coffee consumption and bone health: A risk assessment". Osteoporos Sarcopenia 2020; 6:34-35. [PMID: 32226832 PMCID: PMC7093681 DOI: 10.1016/j.afos.2020.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/13/2020] [Accepted: 02/19/2020] [Indexed: 11/24/2022] Open
Affiliation(s)
- R. Coronado-Zarco
- Corresponding author. Instituto Nacional de Rehabiltación “Luis Guillermo Ibarra Ibarra”, Calz. Mexico-Xochimilco 289, Mexico City, 14389, Mexico.
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Coronado-Zarco R, Olascoaga-Gómez de León A, García-Lara A, Quinzaños-Fresnedo J, Nava-Bringas TI, Macías-Hernández SI. Nonpharmacological interventions for osteoporosis treatment: Systematic review of clinical practice guidelines. Osteoporos Sarcopenia 2019; 5:69-77. [PMID: 31728423 PMCID: PMC6838743 DOI: 10.1016/j.afos.2019.09.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/18/2019] [Accepted: 09/11/2019] [Indexed: 12/19/2022] Open
Abstract
Objectives The aim of this study was to perform a systematic review of clinical practice guidelines to identify nonpharmacologic recommendations for osteoporosis treatment. Methods A systematic review of literature following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses)-statement methodology for clinical practice guidelines was conducted; PROSPERO CRD42019138548. Assessment of selected clinical practice guidelines with the AGREE (Appraisal of Guidelines for Research & Evaluation)-II methodological quality instrument was performed, and those graded over 60 points were selected for recommendations extraction and evidence analysis. Results Only 6 clinical practice guidelines fulfilled criteria, 69 nonpharmacological recommendations were extracted: 13 from American Association of Clinical Endocrinologists and American College of Endocrinology guideline, 16 from Malaysian Osteoporosis Society guideline, 15 from the Ministry of Health in Mexico guideline, 14 from Royal Australian College of General Practitioners guideline, 7 from Sociedad Española de Investigación Ósea y del Metabolismo Mineral guideline, and 7 from National Osteoporosis Guideline Group guideline. Percentage by theme showed that the highest number of recommendations were 12 (17.1%) for vitamin D, 11 (15.7%) for a combination of calcium and vitamin D, and 11 (15.7%) for exercise. Conclusions These recommendations address integrating interventions to modify lifestyle, mainly calcium and vitamin D intake, and exercise. Other recommendations include maintaining adequate protein intake, identification and treatment of risk factors for falls, and limiting the consumption of coffee, alcohol and tobacco. Considerations on prescription must be taken.
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Affiliation(s)
- Roberto Coronado-Zarco
- Directorate of Rehabilitation Medicine, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Andrea Olascoaga-Gómez de León
- Spine Rehabilitation and Osteoporosis Clinic, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Araceli García-Lara
- Audiology, Hospital Infantil de México "Federico Gómez", Mexico City, Mexico
| | - Jimena Quinzaños-Fresnedo
- Neurologic Rehabilitation, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Tania Inés Nava-Bringas
- Spine Rehabilitation and Osteoporosis Clinic, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
| | - Salvador Israel Macías-Hernández
- Spine Rehabilitation and Osteoporosis Clinic, Instituto Nacional de Rehabilitación "Luis Guillermo Ibarra Ibarra", Mexico City, Mexico
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Dertinger SD, Kraynak AR, Wheeldon RP, Bernacki DT, Bryce SM, Hall N, Bemis JC, Galloway SM, Escobar PA, Johnson GE. Predictions of genotoxic potential, mode of action, molecular targets, and potency via a tiered multiflow® assay data analysis strategy. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2019; 60:513-533. [PMID: 30702769 PMCID: PMC6880310 DOI: 10.1002/em.22274] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 01/14/2019] [Accepted: 01/23/2019] [Indexed: 05/08/2023]
Abstract
The in vitro MultiFlow® DNA Damage Assay multiplexes γH2AX, p53, phospho-histone H3, and polyploidization biomarkers into a single flow cytometric analysis. The current report describes a tiered sequential data analysis strategy based on data generated from exposure of human TK6 cells to a previously described 85 chemical training set and a new pharmaceutical-centric test set (n = 40). In each case, exposure was continuous over a range of closely spaced concentrations, and cell aliquots were removed for analysis following 4 and 24 hr of treatment. The first data analysis step focused on chemicals' genotoxic potential, and for this purpose, we evaluated the performance of a machine learning (ML) ensemble, a rubric that considered fold increases in biomarkers against global evaluation factors (GEFs), and a hybrid strategy that considered ML and GEFs. This first tier further used ML output and/or GEFs to classify genotoxic activity as clastogenic and/or aneugenic. Test set results demonstrated the generalizability of the first tier, with particularly good performance from the ML ensemble: 35/40 (88%) concordance with a priori genotoxicity expectations and 21/24 (88%) agreement with expected mode of action (MoA). A second tier applied unsupervised hierarchical clustering to the biomarker response data, and these analyses were found to group certain chemicals, especially aneugens, according to their molecular targets. Finally, a third tier utilized benchmark dose analyses and MultiFlow biomarker responses to rank genotoxic potency. The relevance of these rankings is supported by the strong agreement found between benchmark dose values derived from MultiFlow biomarkers compared to those generated from parallel in vitro micronucleus analyses. Collectively, the results suggest that a tiered MultiFlow data analysis pipeline is capable of rapidly and effectively identifying genotoxic hazards while providing additional information that is useful for modern risk assessments-MoA, molecular targets, and potency. Environ. Mol. Mutagen. 60:513-533, 2019. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Stephen D. Dertinger
- Litron Laboratories, Rochester, New York
- Correspondence to: Stephen D. Dertinger, Litron Laboratories, 3500 Winton Place, Rochester, NY 14623.
| | | | - Ryan P. Wheeldon
- Institute of Life Science, Swansea University Medical School, Swansea University, Swansea, Wales, United Kingdom
| | | | | | - Nikki Hall
- Litron Laboratories, Rochester, New York
| | | | | | | | - George E. Johnson
- Institute of Life Science, Swansea University Medical School, Swansea University, Swansea, Wales, United Kingdom
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Altun Ö, Şuözer M. Synthesis, spectral analysis, antimicrobial, cytotoxicity, and antioxidant studies of gold(III) complex of caffeine. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1629430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Özlen Altun
- Department of General and Inorganic Chemistry, Trakya University, Edirne, Turkey
| | - Mehtap Şuözer
- Department of General and Inorganic Chemistry, Trakya University, Edirne, Turkey
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Xu H, Liu T, Hu L, Li J, Gan C, Xu J, Chen F, Xiang Z, Wang X, Sheng J. Effect of caffeine on ovariectomy-induced osteoporosis in rats. Biomed Pharmacother 2019; 112:108650. [DOI: 10.1016/j.biopha.2019.108650] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/29/2019] [Accepted: 01/29/2019] [Indexed: 01/08/2023] Open
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Li H, Roxo M, Cheng X, Zhang S, Cheng H, Wink M. Pro-oxidant and lifespan extension effects of caffeine and related methylxanthines in Caenorhabditis elegans. Food Chem X 2019; 1:100005. [PMID: 31432005 PMCID: PMC6694850 DOI: 10.1016/j.fochx.2019.100005] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 01/07/2019] [Indexed: 12/23/2022] Open
Abstract
Caffeine and related purine alkaloids are common ingredients of many stimulating drinks. Studies have shown that lower concentrations of caffeine have a protective role in aging-related disorders. However, the associated mode of action of caffeine and its related methylxanthines is still not clear. In this study, we demonstrated that caffeine and theophylline promote longevity in Caenorhabditis elegans. Lifespan studies with the wild type, DAF-16 and SKN-1 mutant strains indicated that the methylxanthines-mediated lifespan extension in C. elegans was independent of DAF-16/FOXO and SKN-1. All the tested methylxanthines could protect C. elegans against acute oxidative stress. At early stages of life, an increase of ROS (reactive oxygen species) induced the translocation of DAF-16 and SKN-1, resulting in upregulation of several antioxidant genes, for example, sod-3p::GFP, gst-4p::GFP, gcs-1p::GFP; and downregulation of hsp-16.2p::GFP. RT-PCR corroborates the upregulation of gst-4 and skn-1 genes. The expression of DAF-16 decreased although its nuclear translocation was induced.
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Affiliation(s)
- Hanmei Li
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
| | - Mariana Roxo
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
| | - Xinlai Cheng
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
| | - Shaoxiong Zhang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Haoran Cheng
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, D-69120 Heidelberg, Germany
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Deng S, Zhou JL, Fang HS, Nie ZG, Chen S, Peng H. Sesamin Protects the Femoral Head From Osteonecrosis by Inhibiting ROS-Induced Osteoblast Apoptosis in Rat Model. Front Physiol 2018; 9:1787. [PMID: 30618801 PMCID: PMC6298420 DOI: 10.3389/fphys.2018.01787] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 11/28/2018] [Indexed: 11/22/2022] Open
Abstract
Glucocorticoids intake has become the most common pathogenic factor for osteonecrosis of the femoral head (ONFH). Annually, tens of millions of patients suffer from pain related to ONFH. Researchers have proposed several underlying mechanisms of ONFH, including osteocyte apoptosis, cell differentiation disorder, and angiogenesis hindrance. Sesamin, isolated from Sesamum indicum seeds, was reported could affect osteocyte inflammation and differentiation in osteoarthritis and osteoporosis. We investigated the underlying influence of sesamin on ONFH rat model. Fifteen male Sprague-Dawley rats were randomly divided into three groups. The ONFH model group only received the methylprednisolone (MPS) and lipopolysaccharide (LPS) injection to promote the development of ONFH. The sesamin treatment group was injected with sesamin, MPS, and LPS. The control group was untreated. Rats from above groups were sacrificed 4 weeks later. The effect of sesamin on ONFH rats was validated by H&E staining. TUNEL staining showed that femoral head necrosis was attenuated by sesamin. Furthermore, the phosphorylation of Akt was increased and the downstream cellular apoptosis signal pathway was inhibited. Intracellular ROS level was decreased after sesamin treatment. In conclusion, our findings suggest that sesamin protects the femoral head from osteonecrosis by inhibiting ROS-induced osteoblast apoptosis.
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Affiliation(s)
- Shuang Deng
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Jian-Lin Zhou
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hong-Song Fang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Zhi-Gang Nie
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Sen Chen
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hao Peng
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, China
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8-(3-phenylpropyl)-1,3,7-triethylxanthine is a synthetic caffeine substitute with stronger metabolic modulator activity. Toxicol In Vitro 2018; 53:114-120. [DOI: 10.1016/j.tiv.2018.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 07/16/2018] [Accepted: 08/08/2018] [Indexed: 02/07/2023]
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Reis AMS, Oliveira KP, de Paula IHF, da Silva AP, Tarragô JF, de Melo Ocarino N, Serakides R. Nonlinear effects of caffeine on the viability, synthesis and gene expression of chondrocytes from the offspring of rats treated during pregnancy. Acta Histochem 2018; 120:505-512. [PMID: 29907324 DOI: 10.1016/j.acthis.2018.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 06/04/2018] [Accepted: 06/08/2018] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Evaluate the effects of doses of caffeine administered to pregnant rats on the articular cartilage chondrocytes of their offspring. METHODS Twenty-four adult Wistar rats were randomly assigned to four groups, with one control group and three groups being treated with caffeine at doses of 25, 50 and 100 mg/kg throughout pregnancy. At birth, three offspring/females were euthanized so that the chondrocytes could be extracted. At 7, 14 and 21 days of culture, the chondrocytes were subjected to the MTT cell viability assay and an evaluation of their alkaline phosphatase activity and collagen synthesis. Chondrocytes were also stained by Hematoxylin-eosin, PAS, Safranin-O and Alcian Blue. The Sox-9, Runx-2, aggrecan, collagen-II and alkaline phosphatase gene transcript levels were also evaluated. Mean comparisons were performed by the Student-Newman-Keuls test. RESULTS Chondrocyte cultures from the 25 mg/kg group had the lowest results, as chondrocytes from this group had reduced viability, percentage of cells, alkaline phosphatase activity and collagen and chondrogenic matrix synthesis. A reduced expression of Sox-9, alkaline phosphatase and collagen-II was also detected in the 25 mg/kg group. Chondrocyte cultures of the group treated with 50 mg/kg caffeine showed reduced collagen synthesis and Sox-9 expression. The caffeine dose of 100 mg/kg also reduced collagen and Sox-9 and alkaline phosphatase expression. CONCLUSION Caffeine administered to pregnant rats negatively alters the articular cartilage chondrocytes of their offspring, reducing the synthesis of collagen and Sox-9 expression regardless of the dose. This study also concluded that the effects of caffeine are not linear or dose-dependent.
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Affiliation(s)
- Amanda Maria Sena Reis
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Karina Pessoa Oliveira
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Isabela Helena Fagundes de Paula
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Alisson Paulo da Silva
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Júlia Fahrion Tarragô
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Natália de Melo Ocarino
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Rogéria Serakides
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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Dai Z, Jin A, Soh AZ, Ang LW, Yuan JM, Koh WP. Coffee and tea drinking in relation to risk of hip fracture in the Singapore Chinese Health Study. Bone 2018; 112:51-57. [PMID: 29660426 PMCID: PMC5970083 DOI: 10.1016/j.bone.2018.04.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 03/26/2018] [Accepted: 04/13/2018] [Indexed: 01/01/2023]
Abstract
Meta-analyses of studies conducted among Western populations suggest that coffee consumption does not affect osteoporotic fracture risk. However, experimental studies have shown that the effect of caffeine on bone health may depend on dosage. We examined the associations between consumption of coffee, tea and caffeine and risk of hip fracture in an Asian cohort. In a population-based prospective cohort of 63,257 Chinese men and women aged 45-74 years in Singapore, a validated semi-quantitative food frequency questionnaire was used to assess habitual consumption of coffee and tea at baseline. Cox proportional hazards regression models were used to estimate hazard ratio (HR) and 95% confidence interval (CI) for risk of hip fracture with adjustment for potential confounders. During a mean follow-up of 16.7 years, 2502 incident hip fracture cases were identified. Compared to coffee drinkers <1 cup/week, those who drank ≥4 cups/day had a statistically significant higher risk to develop hip fractures, the HR (95% CI) was 1.32 (1.07, 1.63) in the whole cohort analysis, 1.46 (1.01, 2.10) for men and 1.33 (1.02, 1.72) for women. Among postmenopausal women, compared to those who drank coffee <1 cup/week, drinking 2-3 cups/day was associated with the lowest risk [HR: 0.88 (0.76, 1.01)] and drinking ≥4 cups/day was associated with the highest risk [HR: 1.31 (1.00, 1.71)]. Similar associations with caffeine intake were found among postmenopausal women. Restricted spline analyses suggested a non-linear association between coffee/caffeine consumption and hip fracture risk in postmenopausal women (p for non-linearity ≤ 0.05). No association was found with tea consumption in either sex. These data suggest that drinking coffee ≥4 cups/day is associated with a higher hip fracture risk, while a moderate intake may alleviate risk in postmenopausal women. Future studies should corroborate these results to determine levels of optimal coffee consumption in relation to bone health.
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Affiliation(s)
- Zhaoli Dai
- Boston University School of Medicine, Clinical Epidemiology Research & Training Unit, USA.
| | - Aizhen Jin
- National Registry of Diseases Office, Health Promotion Board, Singapore
| | - Avril Zixin Soh
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore
| | - Li-Wei Ang
- Epidemiology & Disease Control Division, Ministry of Health, Singapore
| | - Jian-Min Yuan
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Woon-Puay Koh
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore; Health Services and Systems Research, Duke-NUS Medical School, Singapore.
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da Silva CS, de Cássia Gonçalves de Lima R, Elekofehinti OO, Ogunbolude Y, Duarte AE, Rocha JBT, Alencar de Menezes IR, Barros LM, Tsopmo A, Lukong KE, Kamdem JP. Caffeine-supplemented diet modulates oxidative stress markers and improves locomotor behavior in the lobster cockroach Nauphoeta cinerea. Chem Biol Interact 2018; 282:77-84. [DOI: 10.1016/j.cbi.2018.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/30/2017] [Accepted: 01/11/2018] [Indexed: 10/18/2022]
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Wilde S, Dambowsky M, Hempt C, Sutter A, Queisser N. Classification of in vitro genotoxicants using a novel multiplexed biomarker assay compared to the flow cytometric micronucleus test. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2017; 58:662-677. [PMID: 28940655 DOI: 10.1002/em.22130] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/26/2017] [Accepted: 07/28/2017] [Indexed: 06/07/2023]
Abstract
Regulatory in vitro genotoxicity testing exhibits shortcomings in specificity and mode of action (MoA) information. Thus, the aim of this work was to evaluate the performance of the novel MultiFlow® assay composed of mechanistic biomarkers quantified in TK6 cells after treatment (4 and 24 hr): γH2AX (DNA double strand breaks), phosphorylated H3 (mitotic cells), translocated p53 (genotoxicity), and cleaved PARP1 (apoptosis). A reference dataset of 31 compounds with well-established MoA was studied using the MicroFlow® micronucleus assay. A positive call was raised following the earlier published criteria from Litron Laboratories. In the light of our data, these evaluation criteria should probably be adjusted since only 8/11 (73%) nongenotoxicants and 18/20 (90%) genotoxicants were correctly identified. Moreover, there is a need for new in vitro tools to delineate the predominant MoA as in the MicroFlow® assay only 5/9 (56%) aneugens and 4/11 (36%) clastogens were correctly classified. In contrast, the MultiFlow® assay provides more in-depth information about the MoA and therefore reliably discriminates clastogens, aneugens, and nongenotoxicants. By using a lab-specific, practical threshold for the aforementioned biomarkers, 10/11 (91%) nongenotoxicants and 19/20 genotoxicants (95%), 9/11 (82%) clastogens, and 8/9 (89%) aneugens were correctly categorized, suggesting a clear improvement over the MicroFlow® . Furthermore, the MultiFlow markers were benchmarked against established methods to assess the validity of the data. Altogether, these findings demonstrated good agreement between the MultiFlow® assay and the benchmarking methods. Finally, p21 may improve class discrimination given the correct identification of 4/4 (100%) aneugens and 2/5 (40%) clastogens. Environ. Mol. Mutagen. 58:662-677, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Sabrina Wilde
- Investigational Toxicology, Bayer AG, Berlin, Germany
| | | | - Claudia Hempt
- Investigational Toxicology, Bayer AG, Berlin, Germany
| | | | - Nina Queisser
- Investigational Toxicology, Bayer AG, Berlin, Germany
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Rah YC, Yoo MH, Choi J, Park S, Park HC, Oh KH, Lee SH, Kwon SY. In vivo assessment of hair cell damage and developmental toxicity caused by gestational caffeine exposure using zebrafish (Danio rerio) models. Neurotoxicol Teratol 2017; 64:1-7. [DOI: 10.1016/j.ntt.2017.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 05/17/2017] [Accepted: 08/24/2017] [Indexed: 12/12/2022]
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30
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Hyassat D, Alyan T, Jaddou H, Ajlouni KM. Prevalence and Risk Factors of Osteoporosis Among Jordanian Postmenopausal Women Attending the National Center for Diabetes, Endocrinology and Genetics in Jordan. Biores Open Access 2017; 6:85-93. [PMID: 28736691 PMCID: PMC5515108 DOI: 10.1089/biores.2016.0045] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
To assess the prevalence of osteoporosis and osteopenia among Jordanian postmenopausal women attending the National Center for Diabetes, Endocrinology, and Genetics (NCDEG), and to determine the potential associated risk factors. A cross-sectional study was conducted at (NCDEG) in Amman, Jordan. A total of 1079 Jordanian postmenopausal women aged between 45 and 84 years were included in this study that was conducted during the period between April 2013 and December 2014. All patients underwent bone mineral density measurement through dual-energy X-ray absorptiometry (DEXA) scan. DEXA scan was interpreted in terms of T score as per World Health Organization guidelines. The overall prevalence of osteoporosis and osteopenia was 37.5% and 44.6%, respectively. The maximum prevalence of osteoporosis was observed at the lumbar spine (32.4%) followed by the left femoral neck (14.4%), while the maximum prevalence of osteopenia was observed at the left femoral neck (56.1%) followed by the lumbar spine (41.3%). Patients with longer menopausal duration, normal or overweight body mass index, high parity, physical inactivity, positive family history of osteoporosis, inadequate sun exposure, high daily caffeine intake, low daily calcium intake, and delay in the age of menarche were all positively associated with osteoporosis. On the other hand, women with type 2 diabetes mellitus had lower risk of osteoporosis. There is a high prevalence of osteoporosis and osteopenia among Jordanian postmenopausal women. Necessary steps are needed for more public education and a wider dissemination of information about osteoporosis and its prevention.
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Affiliation(s)
- Dana Hyassat
- Department of Endocrinology, The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG)/The University of Jordan, Amman, Jordan
| | - Taghreed Alyan
- Department of Endocrinology, The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG)/The University of Jordan, Amman, Jordan
| | - Hashem Jaddou
- Department of Epidemiology and Public Health, The Jordan University of Science and Technology (JUST), Irbid, Jordan
| | - Kamel M. Ajlouni
- Department of Endocrinology, The National Center (Institute) for Diabetes, Endocrinology and Genetics (NCDEG)/The University of Jordan, Amman, Jordan
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Marshall H, Chrismas BCR, Suckling CA, Roberts JD, Foster J, Taylor L. Chronic probiotic supplementation with or without glutamine does not influence the eHsp72 response to a multi-day ultra-endurance exercise event. Appl Physiol Nutr Metab 2017; 42:876-883. [PMID: 28460195 DOI: 10.1139/apnm-2017-0131] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Probiotic and glutamine supplementation increases tissue Hsp72, but their influence on extracellular Hsp72 (eHsp72) has not been investigated. The aim of this study was to investigate the effect of chronic probiotic supplementation, with or without glutamine, on eHsp72 concentration before and after an ultramarathon. Thirty-two participants were split into 3 independent groups, where they ingested probiotic capsules (PRO; n = 11), probiotic + glutamine powder (PGLn; n = 10), or no supplementation (CON; n = 11), over a 12-week period prior to commencement of the Marathon des Sables (MDS). eHsp72 concentration in the plasma was measured at baseline, 7 days pre-race, 6-8 h post-race, and 7 days post-race. The MDS increased eHsp72 concentrations by 124% (F[1,3] = 22.716, p < 0.001), but there was no difference in the response between groups. Additionally, PRO or PGLn supplementation did not modify pre- or post-MDS eHsp72 concentrations compared with CON (p > 0.05). In conclusion, the MDS caused a substantial increase in eHsp72 concentration, indicating high levels of systemic stress. However, chronic PRO or PGLn supplementation did not affect eHsp72 compared with control pre- or post-MDS. Given the role of eHsp72 in immune activation, the commercially available supplements used in this study are unlikely to influence this cascade.
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Affiliation(s)
- Hannah Marshall
- a Institute of Sport and Physical Activity Research (ISPAR), University of Bedfordshire, Bedford MK41 9EA, UK
| | | | - Craig Anthony Suckling
- c Cambridge Centre for Sport and Exercise Sciences, Department of Life Sciences, Anglia Ruskin University, Cambridge CB1 1PT, UK
| | - Justin D Roberts
- c Cambridge Centre for Sport and Exercise Sciences, Department of Life Sciences, Anglia Ruskin University, Cambridge CB1 1PT, UK
| | - Josh Foster
- a Institute of Sport and Physical Activity Research (ISPAR), University of Bedfordshire, Bedford MK41 9EA, UK
| | - Lee Taylor
- d ASPETAR, Athlete Health and Performance Research Centre, Qatar Orthopaedic and Sports Medicine Hospital, Aspire Zone, PO Box 29222, Doha, Qatar.,e School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TT, UK
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Effect of Energy Drink on Bone Formation in the Expanded Inter-Premaxillary Suture. J Craniofac Surg 2017; 28:285-289. [PMID: 27922952 DOI: 10.1097/scs.0000000000003244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Maxillary expansion of the median palatal suture is a common procedure in orthodontics. Even after retention, there is a strong tendency to relapse in the expanded suture. The authors' objectives are to accelerate the bone formation process in the expanded suture and to reduce the required retention time by using an energy drink (ED). Twenty rats were divided into 2 groups (n = 20). The expansion-only group was defined as the control group (Group C). The other group was defined as the expansion-plus-energy drink group (Group ED). In Group ED, ED was administered systemically through oro-gastric tubes after the expansion period. After 5 days of expansion, the springs were removed and replaced with short lengths of rectangular retaining wire. Tooth separation was maintained for 12 days. Histomorphometric analysis showed significant differences between the 2 groups in terms of newly formed bone (P = 0.018) and the bone area (P = 0.007). For the parameters that were investigated, Group ED had better results than Group C. These results show that systemic administration of an ED during the early stages of the orthopedic expansion of the inter-maxillary suture areas can stimulate bone formation and decrease the time required for retention.
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Lee BJ, Clarke ND, Hankey J, Thake CD. Whole body precooling attenuates the extracellular HSP72, IL-6 and IL-10 responses after an acute bout of running in the heat. J Sports Sci 2017; 36:414-421. [PMID: 28376678 DOI: 10.1080/02640414.2017.1313441] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The impact of whole-body precooling on the extracellular heat shock protein 72 (eHSP72) and cytokine responses to running in the heat is undefined. The aim of this study was to determine whether precooling would attenuate post-exercise eHSP72 and cytokine responses. Eight male recreational runners completed two 90-minute bouts of running at 65% [Formula: see text]O2max in 32 ± 0.9°C and 47 ± 6 % relative humidity (RH) preceded by either 60-minutes of precooling in 20.3 ± 0.3°C water (COOL) or 60 min rest in an air-conditioned laboratory (20.2 ± 1.7°C, 60 ± 3% RH; CON). eHSP72, TNF-α, IL-6, IL-10 IL-1ra were determined before and immediately after exercise. The elevation in post-exercise eHSP72 was attenuated after COOL (+0.04 ± 0.10 ng.mL-1) compared to CON (+ 0.29 ± 0.26 ng.mL-1;P < 0.001). No changes in TNF-α were observed at any stage. COOL reduced the absolute post-exercise change in IL-6 (P = 0.011) and IL-10 (P = 0.03) compared to CON. IL-1ra followed this trend (P = 0.063). A precooling-induced attenuation of eHSP72 and proinflammatory cytokines may aid recovery during multi-day sporting events, but could be counterproductive if a training response or adaptation to environmental stress is a desired outcome.
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Affiliation(s)
- Ben J Lee
- a Department of Sport and Exercise Sciences , University of Chichester , Chichester , UK.,b Centre for Applied Biological and Exercise Sciences , Coventry University , Coventry , UK
| | - Neil D Clarke
- b Centre for Applied Biological and Exercise Sciences , Coventry University , Coventry , UK
| | - Joanne Hankey
- b Centre for Applied Biological and Exercise Sciences , Coventry University , Coventry , UK
| | - Charles D Thake
- b Centre for Applied Biological and Exercise Sciences , Coventry University , Coventry , UK
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Bryce SM, Bernacki DT, Bemis JC, Spellman RA, Engel ME, Schuler M, Lorge E, Heikkinen PT, Hemmann U, Thybaud V, Wilde S, Queisser N, Sutter A, Zeller A, Guérard M, Kirkland D, Dertinger SD. Interlaboratory evaluation of a multiplexed high information content in vitro genotoxicity assay. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2017; 58:146-161. [PMID: 28370322 PMCID: PMC5436310 DOI: 10.1002/em.22083] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 02/27/2017] [Accepted: 02/28/2017] [Indexed: 05/18/2023]
Abstract
We previously described a multiplexed in vitro genotoxicity assay based on flow cytometric analysis of detergent-liberated nuclei that are simultaneously stained with propidium iodide and labeled with fluorescent antibodies against p53, γH2AX, and phospho-histone H3. Inclusion of a known number of microspheres provides absolute nuclei counts. The work described herein was undertaken to evaluate the interlaboratory transferability of this assay, commercially known as MultiFlow® DNA Damage Kit-p53, γH2AX, Phospho-Histone H3. For these experiments, seven laboratories studied reference chemicals from a group of 84 representing clastogens, aneugens, and nongenotoxicants. TK6 cells were exposed to chemicals in 96-well plates over a range of concentrations for 24 hr. At 4 and 24 hr, cell aliquots were added to the MultiFlow reagent mix and following a brief incubation period flow cytometric analysis occurred, in most cases directly from a 96-well plate via a robotic walk-away data acquisition system. Multiplexed response data were evaluated using two analysis approaches, one based on global evaluation factors (i.e., cutoff values derived from all interlaboratory data), and a second based on multinomial logistic regression that considers multiple biomarkers simultaneously. Both data analysis strategies were devised to categorize chemicals as predominately exhibiting a clastogenic, aneugenic, or nongenotoxic mode of action (MoA). Based on the aggregate 231 experiments that were performed, assay sensitivity, specificity, and concordance in relation to a priori MoA grouping were ≥ 92%. These results are encouraging as they suggest that two distinct data analysis strategies can rapidly and reliably predict new chemicals' predominant genotoxic MoA based on data from an efficient and transferable multiplexed in vitro assay. Environ. Mol. Mutagen. 58:146-161, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
| | | | | | | | - Maria E Engel
- Pfizer Worldwide Research and Development, Groton, Connecticut
| | - Maik Schuler
- Pfizer Worldwide Research and Development, Groton, Connecticut
| | | | | | | | | | | | | | | | - Andreas Zeller
- Roche Pharma Research and Early Development, Basel, Switzerland
| | - Melanie Guérard
- Roche Pharma Research and Early Development, Basel, Switzerland
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Jia YB, Jiang DM, Ren YZ, Liang ZH, Zhao ZQ, Wang YX. Inhibitory effects of vitamin E on osteocyte apoptosis and DNA oxidative damage in bone marrow hemopoietic cells at early stage of steroid-induced femoral head necrosis. Mol Med Rep 2017; 15:1585-1592. [PMID: 28259972 PMCID: PMC5364966 DOI: 10.3892/mmr.2017.6160] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Accepted: 12/19/2016] [Indexed: 01/12/2023] Open
Abstract
Apoptosis and DNA oxidative damage serve significant roles in the pathogenesis of steroid-induced femoral head necrosis. Vitamin E demonstrates anti-apoptotic and anti-oxidant properties. Therefore, the present study investigated the effects of vitamin E on osteocyte apoptosis and DNA oxidative damage in bone marrow hemopoietic cells at an early stage of steroid-induced femoral head osteonecrosis. Japanese white rabbits were randomly divided into three groups (steroid, vitamin E-treated, and control groups), each comprising 12 rabbits. Those in the steroid group (group S) were initially injected twice with an intravenous dose of 100 µg/kg Escherichia coli endotoxin, with a 24 h interval between the two injections, and then with an intramuscular dose of 20 mg/kg methylprednisolone, three times at intervals of 24 h in order to establish a rabbit model of osteonecrosis. The vitamin E treated group (group E) received the same treatment as group S, and were administered 0.6 g/kg/d vitamin E daily from the beginning of modeling. The control group (group C) was injected with normal saline at the equivalent dosage and times as the aforementioned two groups. Two time points, weeks 4 and 6 following the completion of modeling, were selected. Osteonecrosis was verified by histopathology with hematoxylin-eosin staining. The apoptosis rate of osteonecrosis was analyzed by terminal deoxynucleotidyl transferase dUTP nick end labeling assay. The apoptosis expression levels of caspase-3 and B-cell lymphoma 2 (Bcl-2), and DNA oxidative damage of bone marrow hematopoietic cells were analyzed by immunohistochemistry. At weeks 4 and 6 following the completion of modeling, the vacant bone lacunae rates of group E were 15.87±1.97 and 25.09±2.67%, respectively, lower than the results of 20.02±2.21 and 27.79±1.39% for group S; and the osteocyte apoptosis indexes of group E were 20.99±2.95 and 33.93±1.62%, respectively, lower than the results of 26.46±3.37 and 39.90±3.74% from group S. In addition, the Bcl-2 expression at week 4 in the femoral head tissues of group E was higher compared with group S; and the proportion of Bcl-2-positive cells of group E was 9.81±1.01%, higher compared with group S at 8.26±1.13%. The caspase-3 staining data at week 4 in femoral head tissues demonstrated that in the 12 femoral heads of group S, four were negative (32%) and eight were positive (68%); in group E, five were negative (45%) and seven were positive (55%); and in group C, 11 were negative (95%) and one was positive (5%). In addition, the DNA oxidative damage rate at week 4 in the bone marrow hemopoietic cells of group E was (7.24±1.44%), lower compared with group S (11.80±1.26%), and higher compared with group C (5.75±1.47%). Vitamin E is effective in intervening in apoptosis through decreasing caspase-3 expression and upregulating Bcl-2 expression, and by alleviating DNA oxidative damage in bone marrow hemopoietic cells at the early stage of steroid-induced femoral head necrosis in rabbit models.
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Affiliation(s)
- Yan-Bo Jia
- Department of Orthopaedics, The First Affiliated Hospital of Chongqing Medical University, Yuanjia Gang, Chongqing 400016, P.R. China
| | - Dian-Ming Jiang
- Department of Orthopaedics, The First Affiliated Hospital of Chongqing Medical University, Yuanjia Gang, Chongqing 400016, P.R. China
| | - Yi-Zhong Ren
- Department of Orthopaedics, The Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolia 010030, P.R. China
| | - Zi-Hong Liang
- Department of Neurology, Inner Mongolia Autonomous Region People's Hospital, Huhhot, Inner Mongolia 010030, P.R. China
| | - Zhen-Qun Zhao
- Department of Orthopaedics, The Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolia 010030, P.R. China
| | - Yu-Xin Wang
- Department of Orthopaedics, The Second Affiliated Hospital of Inner Mongolia Medical University, Huhhot, Inner Mongolia 010030, P.R. China
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Choi H, Choi Y, Kim J, Bae J, Roh J. Longitudinal bone growth is impaired by direct involvement of caffeine with chondrocyte differentiation in the growth plate. J Anat 2017; 230:117-127. [PMID: 27484046 PMCID: PMC5192894 DOI: 10.1111/joa.12530] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2016] [Indexed: 12/17/2022] Open
Abstract
We showed previously that caffeine adversely affects longitudinal bone growth and disrupts the histomorphometry of the growth plate during the pubertal growth spurt. However, little attention has been paid to the direct effects of caffeine on chondrocytes. Here, we investigated the direct effects of caffeine on chondrocytes of the growth plate in vivo and in vitro using a rapidly growing young rat model, and determined whether they were related to the adenosine receptor signaling pathway. A total of 15 male rats (21 days old) were divided randomly into three groups: a control group and two groups fed caffeine via gavage with 120 and 180 mg kg-1 day-1 for 4 weeks. After sacrifice, the tibia processed for the analysis of the long bone growth and proliferation of chondrocytes using tetracycline and BrdU incorporation, respectively. Caffeine-fed animals showed decreases in matrix mineralization and proliferation rate of growth plate chondrocytes compared with the control. To evaluate whether caffeine directly affects chondrocyte proliferation and chondrogenic differentiation, primary rat chondrocytes were isolated from the growth plates and cultured in either the presence or absence of caffeine at concentrations of 0.1-1 mm, followed by determination of the cellular proliferation or expression profiles of cellular differentiation markers. Caffeine caused significant decreases in extracellular matrix production, mineralization, and alkaline phosphatase activity, accompanied with decreases in gene expression of the cartilage-specific matrix proteins such as aggrecan, type II collagen and type X. Our results clearly demonstrate that caffeine is capable of interfering with cartilage induction by directly inhibiting the synthetic activity and orderly expression of marker genes relevant to chondrocyte maturation. In addition, we found that the adenosine type 1 receptor signaling pathway may be partly involved in the detrimental effects of caffeine on chondrogenic differentiation, specifically matrix production and mineralization, as evidenced by attenuation of the inhibitory effects of caffeine by blockade of this receptor. Thus, our study provides novel information on the integration of caffeine and adenosine receptor signaling during chondrocyte maturation, extending our understanding of the effect of caffeine at a cellular level on chondrocytes of the growth plate.
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Affiliation(s)
- Hyeonhae Choi
- Department of Anatomy & Cell BiologyCollege of MedicineHanyang UniversitySeoulSouth Korea
| | - Yuri Choi
- Department of Anatomy & Cell BiologyCollege of MedicineHanyang UniversitySeoulSouth Korea
| | - Jisook Kim
- Department of PathologyCollege of MedicineHanyang UniversitySeoulSouth Korea
| | - Jaeman Bae
- Department of Obstetrics & GynecologyCollege of MedicineHanyang UniversitySeoulSouth Korea
| | - Jaesook Roh
- Department of Anatomy & Cell BiologyCollege of MedicineHanyang UniversitySeoulSouth Korea
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Downs RM, Hughes MA, Kinsey ST, Johnson MC, Baumgarner BL. Inhibiting c-Jun N-terminal kinase partially attenuates caffeine-dependent cell death without alleviating the caffeine-induced reduction in mitochondrial respiration in C2C12 skeletal myotubes. Biochem Biophys Res Commun 2016; 480:61-68. [PMID: 27717822 DOI: 10.1016/j.bbrc.2016.10.008] [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: 09/23/2016] [Accepted: 10/03/2016] [Indexed: 10/20/2022]
Abstract
Caffeine is a widely consumed stimulant that has previously been shown to promote cytotoxic stress and even cell death in numerous mammalian cell lines. Thus far there is little information available regarding the toxicity of caffeine in skeletal muscle cells. Our preliminary data revealed that treating C2C12 myotubes with 5 mM caffeine for 6 h increased nuclear fragmentation and reduced basal and maximal oxygen consumption rate (OCR) in skeletal myotubes. The purpose of this study was to further elucidate the pathways by which caffeine increased cell death and reduced mitochondrial respiration. We specifically examined the role of c-Jun N-terminal kinase (JNK), which has previously been shown to simultaneously increase caspase-dependent cell death and reduce mitochondrial respiration in other mammalian cell lines. We found that caffeine promoted a dose-dependent increase in cell death in multinucleated myotubes but did not in mononucleated myoblasts. The addition of 10 μM Z-DEVD-FMK, a specific inhibitor of executioner caspases, completely inhibited caffeine-dependent cell death. Further, the addition of 400 μM dantrolene, a specific ryanodine receptor (RYR) inhibitor, prevented the caffeine-dependent increase in cell death and the reduction in basal and maximal OCR. We also discovered that caffeine treatment significantly increased the phosphorylation of JNK and that the addition of 30 μM SP600125 (JNKi), a specific JNK inhibitor, partially attenuated caffeine-induced cell death without preventing the caffeine-dependent reduction in basal and maximal OCR. Our results suggest that JNK partially mediates the increase in caspase-dependent cell death but does not contribute to reduced mitochondrial respiration in caffeine-treated skeletal muscle cells. We conclude that caffeine increased cell death and reduced mitochondrial respiration in a calcium-dependent manner by activating the RYR and promoting reticular calcium release.
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Affiliation(s)
- R M Downs
- Division of Natural Sciences and Engineering, University of South Carolina Upstate, Spartanburg, SC, USA
| | - M A Hughes
- Division of Natural Sciences and Engineering, University of South Carolina Upstate, Spartanburg, SC, USA
| | - S T Kinsey
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, USA
| | - M C Johnson
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, USA
| | - B L Baumgarner
- Division of Natural Sciences and Engineering, University of South Carolina Upstate, Spartanburg, SC, USA.
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Bernacki DT, Bryce SM, Bemis JC, Kirkland D, Dertinger SD. γH2AX and p53 responses in TK6 cells discriminate promutagens and nongenotoxicants in the presence of rat liver S9. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2016; 57:546-558. [PMID: 27364561 PMCID: PMC4980245 DOI: 10.1002/em.22028] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 05/24/2016] [Accepted: 05/24/2016] [Indexed: 05/03/2023]
Abstract
Previous work with a diverse set of reference chemicals suggests that an in vitro multiplexed flow cytometry-based assay (MultiFlow™ DNA Damage Kit-p53, γH2AX, Phospho-Histone H3) can distinguish direct-acting clastogens and aneugens from nongenotoxicants (Bryce SM et al. []: Environ Mol Mutagen 57:171-189). This work extends this line of investigation to include compounds that require metabolic activation to form reactive electrophiles. For these experiments, TK6 cells were exposed to 11 promutagens and 37 presumed nongenotoxicants in 96 well plates. Unless precipitation or foreknowledge about cytotoxicity suggested otherwise, the highest concentration was 1 mM. Exposure occurred for 4 hr after which time cells were washed to remove S9 and test article. Immediately following the wash and again at 24 hr, cell aliquots were added to wells of a microtiter plate containing the working detergent/stain/antibody cocktail. After a brief incubation, robotic sampling was employed for walk-away flow cytometric data acquisition. Univariate logistic regression analyses indicated that γH2AX induction and p53 activation provide the greatest degree of discrimination between clastogens and nongenotoxicants. Multivariate prediction algorithms that incorporated both of these endpoints, in each combination of time points, were evaluated. The best performing models correctly predicted 9 clastogens out of 11 and 36 nongenotoxicants out of 37. These results are encouraging as they suggest that an efficient and highly scalable multiplexed assay can effectively identify clastogenic chemicals that require bioactivation. More work is planned with a broader range of chemicals, additional cell lines, and other laboratories to further evaluate the merits and limitations of this approach. Environ. Mol. Mutagen. 57:546-558, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Derek T. Bernacki
- Litron Laboratories, 3500 Winton Place, Rochester, New York, 14623, USA
| | - Steven M. Bryce
- Litron Laboratories, 3500 Winton Place, Rochester, New York, 14623, USA
| | - Jeffrey C. Bemis
- Litron Laboratories, 3500 Winton Place, Rochester, New York, 14623, USA
| | | | - Stephen D. Dertinger
- Litron Laboratories, 3500 Winton Place, Rochester, New York, 14623, USA
- corresponding author: S.D.D., 585-442-0930,
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Bryce SM, Bernacki DT, Bemis JC, Dertinger SD. Genotoxic mode of action predictions from a multiplexed flow cytometric assay and a machine learning approach. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2016; 57:171-89. [PMID: 26764165 PMCID: PMC4792721 DOI: 10.1002/em.21996] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 05/19/2023]
Abstract
Several endpoints associated with cellular responses to DNA damage as well as overt cytotoxicity were multiplexed into a miniaturized, "add and read" type flow cytometric assay. Reagents included a detergent to liberate nuclei, RNase and propidium iodide to serve as a pan-DNA dye, fluorescent antibodies against γH2AX, phospho-histone H3, and p53, and fluorescent microspheres for absolute nuclei counts. The assay was applied to TK6 cells and 67 diverse reference chemicals that served as a training set. Exposure was for 24 hrs in 96-well plates, and unless precipitation or foreknowledge about cytotoxicity suggested otherwise, the highest concentration was 1 mM. At 4- and 24-hrs aliquots were removed and added to microtiter plates containing the reagent mix. Following a brief incubation period robotic sampling facilitated walk-away data acquisition. Univariate analyses identified biomarkers and time points that were valuable for classifying agents into one of three groups: clastogenic, aneugenic, or non-genotoxic. These mode of action predictions were optimized with a forward-stepping process that considered Wald test p-values, receiver operator characteristic curves, and pseudo R(2) values, among others. A particularly high performing multinomial logistic regression model was comprised of four factors: 4 hr γH2AX and phospho-histone H3 values, and 24 hr p53 and polyploidy values. For the training set chemicals, the four-factor model resulted in 94% concordance with our a priori classifications. Cross validation occurred via a leave-one-out approach, and in this case 91% concordance was observed. A test set of 17 chemicals that were not used to construct the model were evaluated, some of which utilized a short-term treatment in the presence of a metabolic activation system, and in 16 cases mode of action was correctly predicted. These initial results are encouraging as they suggest a machine learning strategy can be used to rapidly and reliably predict new chemicals' genotoxic mode of action based on data from an efficient and highly scalable multiplexed assay.
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Murase Y, Shimizu K, Tanimura Y, Hanaoka Y, Watanabe K, Kono I, Miyakawa S. Salivary extracellular heat shock protein 70 (eHSP70) levels increase after 59 min of intense exercise and correlate with resting salivary secretory immunoglobulin A (SIgA) levels at rest. Cell Stress Chaperones 2016; 21:261-9. [PMID: 26608509 PMCID: PMC4786527 DOI: 10.1007/s12192-015-0656-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 10/20/2015] [Accepted: 10/26/2015] [Indexed: 10/25/2022] Open
Abstract
This study aimed to identify the response of a salivary stress protein, extracellular heat shock protein (eHSP70), to intense exercise and to investigate the relationship between salivary eHSP70 and salivary immunoglobulin A (SIgA) levels in response to exercise. Sixteen healthy sedentary young males (means ± SD 23.8 ± 1.5 years, 172.2 ± 6.4 cm, 68.3 ± 7.4 kg) performed 59 min of cycling exercise at 75% VO2max. Saliva and whole blood samples were collected before (Pre), immediately after (Post), and at 1, 2, 3, and 4 h after completion of the exercise (1, 2, 3, and 4 h). The salivary eHSP70 and SIgA levels were measured by enzyme-linked imunosorbent assay (ELISA), and the secretion rates were computed by multiplying the concentration by the saliva flow rate. White blood cells were analyzed using an automated cell counter with a direct-current detection system. The salivary eHSP70 secretion rates were 1.11 ± 0.86, 1.51 ± 1.47, 1.57 ± 1.32, 2.21 ± 2.04, 3.36 ± 2.72, and 6.89 ± 4.02 ng · min(-1) at Pre, Post, and 1, 2, 3, and 4 h, respectively. The salivary eHSP70 secretion rate was significantly higher at 4 h than that at Pre, Post, 1, and 3 h (p < 0.05). The SIgA secretion rates were 26.9 ± 12.6, 20.3 ± 10.4, 19.6 ± 11.0, 21.8 ± 12.8, 21.5 ± 11.9, and 21.9 ± 11.7 μg · min(-1) at Pre, Post, 1, 2, 3, and 4 h, respectively. The salivary SIgA secretion rate was significantly lower between 1 and 4 h than that at Pre (p < 0.05). There was a positive correlation between salivary eHSP70 and SIgA in both concentration and secretion rates before exercise (p < 0.05). The absolute number of white blood cells significantly increased after exercise, with a maximum at 2 h (p < 0.05). The neutrophil/lymphocyte ratio was significantly increased from 1 to 4 h when compared with that in the Pre samples (p < 0.05). The present study revealed that salivary eHSP70 significantly increased at 4 h after the 59 min of intense exercise in sedentary male subjects. Exercise stress can induce elevated salivary eHSP70 level and upregulate oral immune function partially.
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Affiliation(s)
- Yosuke Murase
- Department of Health Care and Sports, Faculty of Human Life Design, Toyo University, Oka 48-1, Asaka-Shi, Saitama, 351-8510, Japan.
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.
| | - Kazuhiro Shimizu
- Department of Sports Science, Japan Institute of Sports Sciences, 3-15-1 Nishigaoka, Kita-ku, Tokyo, 115-0056, Japan
- Sports Research & Development Core, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Yuko Tanimura
- Faculty of Human Studies, Aichi Toho University, 3-11 Heiwagaoka, Meitou-ku, Aichi, 465-8515, Japan
| | - Yukichi Hanaoka
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Koichi Watanabe
- Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Ichiro Kono
- University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Shumpei Miyakawa
- Faculty of Health and Sport Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
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Reis AMS, Ocarino NDM, Boeloni JN, Gomes DA, Goes AM, Ferreira ADF, Serakides R. Inhibition of the osteogenic differentiation of mesenchymal stem cells derived from the offspring of rats treated with caffeine during pregnancy and lactation. Connect Tissue Res 2015; 57:131-42. [PMID: 26634797 DOI: 10.3109/03008207.2015.1117075] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Caffeine is an alkaloid that is widely consumed due to its presence in drugs, coffee, tea, and chocolate. This compound passes to offspring through the placenta and milk; can cause teratogenic mutations; and reduces the formation, growth, and mass of bone. Because mesenchymal stem cells (MSCs) are responsible for generating the entire skeleton, we hypothesized that these cells are targets of caffeine. This study evaluated the osteogenic differentiation of MSCs derived from the offspring of rats treated with caffeine during pregnancy and lactation. Twenty-four adult Wistar rats were randomly divided into four groups, including one control group and three experimental groups treated with 25, 50, or 100 mg/kg of caffeine. At weaning, three 21-day-old pups from each dam in each group were euthanized for extraction of bone marrow cells for in vitro tests. Caffeine doses of 50 and 100 mg/kg significantly reduced the activity of alkaline phosphatase at 7, 14, and 21 days and the expression of collagen I at 21 days. However, the expression of gene transcripts for alkaline phosphatase, Runx-2, and bone sialoprotein, as well as the synthesis of mineralization nodules, decreased significantly in all groups treated with caffeine. The expression of osteocalcin was significantly reduced only in the group treated with 50 mg/kg caffeine. The caffeine that passes from the mother to the offspring during pregnancy and lactation reduces the osteogenic differentiation of MSCs. We propose that this reduction in the osteogenic potential of MSCs may be involved in the pathogenesis of osteopenia resulting from caffeine consumption.
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Affiliation(s)
- Amanda Maria Sena Reis
- a Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária , Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais , Brazil
| | - Natália de Melo Ocarino
- a Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária , Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais , Brazil
| | - Jankerle Neves Boeloni
- a Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária , Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais , Brazil
| | - Dawidson Assis Gomes
- b Laboratório de Imunologia Celular e Biologia Molecular do Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais , Brazil
| | - Alfredo Miranda Goes
- b Laboratório de Imunologia Celular e Biologia Molecular do Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais , Brazil
| | - Andrea da Fonseca Ferreira
- b Laboratório de Imunologia Celular e Biologia Molecular do Departamento de Bioquímica e Imunologia , Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais , Brazil
| | - Rogéria Serakides
- a Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) do Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária , Universidade Federal de Minas Gerais , Belo Horizonte , Minas Gerais , Brazil
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Botelho A, Reis A, Ocarino N, Serakides R. Efeitos da ingestão de cafeína durante a gestação e a lactação sobre a pele de ratas e de filhotes e sua relação com as concentrações séricas do cortisol materno. ARQ BRAS MED VET ZOO 2015. [DOI: 10.1590/1678-4162-7151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
O objetivo deste trabalho foi verificar os efeitos da ingestão materna de diferentes doses de cafeína durante a gestação e a lactação, na pele de ratas-mães e filhotes, bem como sua relação com as concentrações séricas do cortisol materno. Vinte e quatro ratas Wistar adultas foram distribuídas em quatro grupos, representados pelo controle e tratados, com cafeína nas doses de 25, 50 e 100mg/kg. Os grupos tratados receberam cafeína por sonda orogástrica durante toda a gestação e a lactação. O controle recebeu água destilada como placebo. Foram avaliados e quantificados os diferentes tipos de folículos pilosos e a espessura da epiderme. A técnica de imuno-histoquímica, com o uso do anticorpo anti-CDC47, foi utilizada para avaliar a proliferação celular da epiderme e dos folículos pilosos das mães. Na mãe, também foram mensurados os níveis séricos de cortisol pela técnica da quimioluminescência. Os dados foram submetidos à análise de variância com comparação das médias pelos testes Kruskal-Wallis e SNK. Nos grupos tratados com cafeína nas doses de 25 e 50mg/kg, tanto as mães quanto seus filhotes apresentaram hipotricose e/ou alopecia focal. Apesar de a frequência de alterações macroscópicas das mães ter sido superior a dos filhotes, nestes as lesões, quando presentes, foram difusas. A análise histológica demonstrou calcinose de folículos pilosos nas mães e nos filhotes. Mas a morfometria somente revelou diferença significativa no número de folículos pilosos das mães, bem como redução significativa da proliferação celular dos folículos pilosos do grupo tratado com 50mg/kg de cafeína. Os níveis de cortisol materno somente foram significativamente elevados no grupo tratado com 100mg/kg de cafeína. Conclui-se que a cafeína ingerida pelas ratas gestantes e lactantes pode causar lesões cutâneas tanto nas mães quanto nos filhotes, caracterizadas por hipotricose e/ou alopecia, independentemente dos níveis séricos do cortisol materno.
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Bavari M, Tabandeh MR, Najafzadeh Varzi H, Bahramzadeh S. Neuroprotective, antiapoptotic and antioxidant effects ofl-carnitine against caffeine-induced neurotoxicity in SH-SY5Y neuroblastoma cell line. Drug Chem Toxicol 2015; 39:157-66. [DOI: 10.3109/01480545.2015.1063062] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Macedo RM, Brentegani LG, Lacerda SAD. Effects of Coffee Intake and Intraperitoneal Caffeine on Bone Repair Process - A Histologic and Histometric Study. Braz Dent J 2015; 26:175-80. [DOI: 10.1590/0103-6440201300219] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 12/27/2014] [Indexed: 11/22/2022] Open
Abstract
Studies have suggested that caffeine acts on bone promoting an increase of calcium excretion, inhibition of osteoblast proliferation and delay in tissue repair process, raising the risk of fractures, osteoporosis, periodontal disease and affecting the success of bone reconstructive procedures. The aim of this study was to analyze histomorphometrically the process of alveolar bone healing after tooth extraction in rats subjected to daily intake of boiled coffee or intraperitoneal administration of caffeine. Forty-five male rats were divided according to the treatment in Control group (C); Coffee group (CO) - treated with coffee since birth; and Caffeine (CAF) - intraperitoneal injection of aqueous solution of caffeine 1.5% (0.2 mL/100g body weight) for 30 days. When weighing between 250-300 g they were anesthetized, subjected to extraction of the maxillary right incisor, and euthanized 7, 21 and 42 days after surgery for histological assessments of bone volume and the quality of formed bone in the dental socket. The qualitative results demonstrated larger amounts of blood clot and immature bone in animals under treatment of pure caffeine compared to coffee and control. Histometric analysis revealed that coffee treatment led to a 40% drop in bone formation, and caffeine a 60% drop in comparison to control animals (ANOVA p≤0.01). It was concluded that both the daily ingestion of coffee and the intraperitoneal administration of caffeine in rats delayed the alveolar bone reparative process after tooth extraction, and this effect was more aggressive when pure caffeine was used.
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Dietary patterns and bone mineral density in Brazilian postmenopausal women with osteoporosis: a cross-sectional study. Eur J Clin Nutr 2015; 70:85-90. [PMID: 25804275 DOI: 10.1038/ejcn.2015.27] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/15/2014] [Accepted: 01/26/2015] [Indexed: 02/02/2023]
Abstract
BACKGROUND/OBJECTIVES The aim of this study was to investigate the association between dietary patterns and bone mineral density (BMD) in postmenopausal women with osteoporosis. SUBJECTS/METHODS This cross-sectional study included 156 postmenopausal and osteoporotic Brazilian women aged over 45 years. BMD of lumbar spine, total femur (TF), femoral neck and of total body (TB), as well as body composition (fat and lean mass), was assessed by dual-energy X-ray absorptiometry. Body mass index and lifestyle information were also obtained. Dietary intake was assessed by using a 3-day food diary. Dietary patterns were obtained by principal component factor analysis. Adjusted multiple linear regression analysis was applied in order to evaluate the predictive effect of dietary patterns on BMD. Significance was set at P<0.05. RESULTS Five patterns were retained: 'healthy', 'red meat and refined cereals', 'low-fat dairy', 'sweet foods, coffee and tea' and 'Western'. The 'sweet foods, coffee and tea' pattern was inversely associated with TF BMD (β=-0.178; 95% CI: -0.039 to -0.000) and with TB BMD (β=-0.320; 95% CI: -0.059 to -0.017) even after adjusting for energy and calcium intake, lean mass, age and postmenopausal time. CONCLUSIONS A concomitant excessive consumption of sweet foods and caffeinated beverages appears to exert a negative effect on BMD even when the skeleton already presents some demineralization. Food and beverage intake is a modifiable factor that should not be neglected in the treatment of individuals with osteoporosis.
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Human monocyte heat shock protein 72 responses to acute hypoxic exercise after 3 days of exercise heat acclimation. BIOMED RESEARCH INTERNATIONAL 2015; 2015:849809. [PMID: 25874231 PMCID: PMC4385626 DOI: 10.1155/2015/849809] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 10/21/2014] [Indexed: 01/21/2023]
Abstract
The aim of this study was to determine whether short-term heat acclimation (STHA) could confer increased cellular tolerance to acute hypoxic exercise in humans as determined via monocyte HSP72 (mHSP72) expression. Sixteen males were separated into two matched groups. The STHA group completed 3 days of exercise heat acclimation; 60 minutes cycling at 50% V̇O2peak in 40°C 20% relative humidity (RH). The control group (CON) completed 3 days of exercise training in 20°C, 40% RH. Each group completed a hypoxic stress test (HST) one week before and 48 hours following the final day of CON or STHA. Percentage changes in HSP72 concentrations were similar between STHA and CON following HST1 (P = 0.97). STHA induced an increase in basal HSP72 (P = 0.03) with no change observed in CON (P = 0.218). Basal mHSP72 remained elevated before HST2 for the STHA group (P < 0.05) and was unchanged from HST1 in CON (P > 0.05). Percent change in mHSP72 was lower after HST2 in STHA compared to CON (P = 0.02). The mHSP72 response to hypoxic exercise was attenuated following 3 days of heat acclimation. This is indicative of improved tolerance and ability to cope with the hypoxic insult, potentially mediated in part by increased basal reserves of HSP72.
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Reis AMS, Ribeiro LGR, Ocarino NDM, Goes AM, Serakides R. Osteogenic potential of osteoblasts from neonatal rats born to mothers treated with caffeine throughout pregnancy. BMC Musculoskelet Disord 2015; 16:10. [PMID: 25649420 PMCID: PMC4324429 DOI: 10.1186/s12891-015-0467-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 01/15/2015] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Caffeine is an active alkaloid that can cause damage to bones in formation during prenatal life into adulthood. This compound can pass across the placenta and into the mother's milk, causing a reduction in bone formation, growth and mass. The objective of this study was to examine the osteogenic potential of osteoblasts extracted from neonatal rats born to mothers treated with caffeine throughout pregnancy. METHODS Twenty-four adult Wistar rats were randomly divided into four groups, consisting of one control group and three groups that were treated with 25, 50, or 100 mg/kg of caffeine by an oral-gastric probe throughout the duration of the experimental period (pregnancy). At birth, three puppies from each dam in each group were euthanized, and osteoblasts were extracted from the calvaria of these pups for in vitro testing. RESULTS The osteoblasts extracted from the pups of rats that received 50 mg/kg caffeine during pregnancy exhibited increased expression of osteocalcin, osteopontin, sialoprotein, runx-2, alkaline phosphatase and type I collagen transcripts, resulting in increased synthesis of mineralization nodules. CONCLUSIONS Neonates from rats treated with 50 mg/kg caffeine during pregnancy contained osteoblasts with a higher osteogenic potential characterized by increased expression of osteocalcin, osteopontin, sialoprotein, runx-2, alkaline phosphatase and type I collagen and increased synthesis of mineralization nodules.
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Affiliation(s)
- Amanda Maria Sena Reis
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) da Escola de Veterinária da Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Caixa Postal 567, campus Pampulha da UFMG, CEP 30123-970, Belo Horizonte, MG, Brazil.
| | - Lorena Gabriela Rocha Ribeiro
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) da Escola de Veterinária da Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Caixa Postal 567, campus Pampulha da UFMG, CEP 30123-970, Belo Horizonte, MG, Brazil.
| | - Natália de Melo Ocarino
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) da Escola de Veterinária da Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Caixa Postal 567, campus Pampulha da UFMG, CEP 30123-970, Belo Horizonte, MG, Brazil.
| | - Alfredo Miranda Goes
- Laboratório de Imunologia Celular e Biologia Molecular do Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos, 6627, CEP: 30.161-970, Belo Horizonte, Minas Gerais, Brazil.
| | - Rogéria Serakides
- Núcleo de Células Tronco e Terapia Celular Animal (NCT-TCA) da Escola de Veterinária da Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Caixa Postal 567, campus Pampulha da UFMG, CEP 30123-970, Belo Horizonte, MG, Brazil.
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Batista MN, Carneiro BM, Braga ACS, Rahal P. Caffeine inhibits hepatitis C virus replication in vitro. Arch Virol 2014; 160:399-407. [PMID: 25491197 DOI: 10.1007/s00705-014-2302-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 11/28/2014] [Indexed: 12/27/2022]
Abstract
Hepatitis C is considered the major cause of cirrhosis and hepatocellular carcinoma. Conventional treatment is not effective against some hepatitis C virus (HCV) genotypes; therefore, new treatments are needed. Coffee and, more recently, caffeine, have been found to have a beneficial effect in several disorders of the liver, including those manifesting abnormal liver biochemistry, cirrhosis and hepatocellular carcinoma. Caffeine acts directly by delaying fibrosis, thereby improving the function of liver cellular pathways and interfering with pathways used by the HCV replication cycle. In the current study, the direct relationship between caffeine and viral replication was evaluated. The Huh-7.5 cell line was used for transient infections with FL-J6/JFH-5'C19Rluc2AUbi and to establish a cell line stably expressing SGR-Feo JFH-1. Caffeine efficiently inhibited HCV replication in a dose-dependent manner at non-cytotoxic concentrations and demonstrated an IC50 value of 0.7263 mM after 48 h of incubation. These data demonstrate that caffeine may be an important new agent for anti-HCV therapies due to its efficient inhibition of HCV replication at non-toxic concentrations.
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Affiliation(s)
- Mariana N Batista
- Department of Biology, Institute of Bioscience, Language and Literature and Exact Science, São Paulo State University, IBILCE, UNESP, Rua Cristóvão Colombo 2265, São José do Rio Preto, SP, 15054-000, Brazil
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Abstract
AbstractCaffeine is the most common natural neuroactive substance around the world. The exact mechanism of the anticancer effects of caffeine is not clear, especially in the contexts of the cytoskeletal changes. It is known that caffeine exerts an effect on cell cycle, cell proliferation, radiosensivity of cells, and also induces cell death. The aim of the study was to determine the effect of 10 and 20 mM L−1 caffeine on the major cytoskeletal proteins in non-small lung cancer cell line H1299. Caffeine treatment induced abnormalities in morphology and ultrastructure of cells. Moreover, the fluorescence studies showed changes in organization of vimentin, β-tubulin, lamin A/C and F-actin, which were attributed to the induction of cell death. The results also demonstrated that caffeine induced formation of two cell populations: giant, mono- or multinucleated cells, with the phenotype of mitotic catastrophe and shrunken cells with condensation of chromatin, typical of apoptosis. This study for the first time shows the effect of caffeine on the cytoskeleton of H1299 cell line. In conclusion, a high-dose caffeine treatment induces apoptotic cell death and makes it a powerful anticancer agent that should be considered for the treatment of non-small cell lung cancer.
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Bryce SM, Bemis JC, Mereness JA, Spellman RA, Moss J, Dickinson D, Schuler MJ, Dertinger SD. Interpreting in vitro micronucleus positive results: simple biomarker matrix discriminates clastogens, aneugens, and misleading positive agents. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2014; 55:542-555. [PMID: 24756928 DOI: 10.1002/em.21868] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 03/31/2014] [Accepted: 04/01/2014] [Indexed: 06/03/2023]
Abstract
The specificity of in vitro mammalian cell genotoxicity assays is low, as they yield a high incidence of positive results that are not observed in animal genotoxicity and carcinogenicity tests, that is, "misleading" or "irrelevant" positives. We set out to develop a rapid and effective follow-up testing strategy that would predict whether apparent in vitro micronucleus-inducing effects are due to a clastogenic, aneugenic, or secondary irrelevant mode(s) of action. Priority was given to biomarkers that could be multiplexed onto flow cytometric acquisition of micronucleus frequencies, or that could be accomplished in parallel using a homogeneous-type assay. A training set of 30 chemicals comprised of clastogens, aneugens, and misleading positive chemicals was studied. These experiments were conducted with human TK6 cells over a range of closely spaced concentrations in a continuous exposure design. In addition to micronucleus frequency, the following endpoints were investigated, most often at time of harvest: cleaved Parp-positive chromatin, cleaved caspase 3-positive chromatin, ethidium monoazide bromide-positive chromatin, polyploid nuclei, phospho-histone H3-positive (metaphase) cells, tetramethylrhodamine ethyl ester-negative cells, cellular ATP levels, cell cycle perturbation, and shift in γ-H2AX fluorescence relative to solvent control. Logistic regression was used to identify endpoints that effectively predict chemicals' a priori classification. Cross validation using a leave-one-out approach indicated that a promising base model includes γ-H2AX shift and change in phospho-histone H3-positive events (25/30 correct calls). Improvements were realized when one or two additional endpoints were included (26-30/30 correct calls). These models were further evaluated with a test set of 10 chemicals, and also by evaluating 3 chemicals at a collaborating laboratory. The resulting data support the hypothesis that a matrix of high throughput-compatible biomarkers can effectively delineate two important modes of genotoxic action as well as identify cytotoxicity that can lead to irrelevant positive results.
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