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Hacıseyitoğlu AÖ, Doğan TÇ, Dilsiz SA, Canpınar H, Eken A, Bucurgat ÜÜ. Pitavastatin induces caspase-mediated apoptotic death through oxidative stress and DNA damage in combined with cisplatin in human cervical cancer cell line. J Appl Toxicol 2024; 44:623-640. [PMID: 38053498 DOI: 10.1002/jat.4565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/19/2023] [Accepted: 11/03/2023] [Indexed: 12/07/2023]
Abstract
Pitavastatin (PITA) is a 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase inhibitor to treat hypercholesterolemia and in recent studies is focused that its potential anti-cancer effect. This study was aimed to elucidate the effect of PITA alone and in combination with cisplatin on cervical cancer cells (HeLa) in vitro. Cytotoxicity of PITA (5-200 μM) was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and neutral red uptake (NRU) assays for 24, 48, and 72 h. Cell apoptosis and cell cycle analyses were performed in flow cytometry (0.1-100 μM). The evaluation of genotoxic effects and oxidative DNA damage of PITA (2-200 μM) were performed with standard comet assay, formamidopyrimidine glycosylase (fpg)-modified comet assay, and reactive oxygen species (ROS) activation in HeLa cells. PITA alone reduced cell viability in a dose-dependent manner (20-200, 20-200, and 5-200 μM for 24, 48, and 72 h, respectively, in MTT). The combined treatment of PITA with cisplatin resulted in significantly greater inhibition of cell viability. ROS and DNA damage increased significantly at 100 μM for 4 h and 20 μM for 24 h, respectively. PITA-induced apoptosis, an increased proportion of sub G1 cells, was monitored, and also, it increased the expression of active caspase-9 and caspase-3 and upregulated cleaved poly adenosine diphosphate ribose polymerase (PARP) by western blotting and caspase 3/8/9 multiple assay kit. We conclude that PITA can be used to efficiently cervical cancer studies, and promising findings have been obtained for further studies.
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Affiliation(s)
- Aysun Ökçesiz Hacıseyitoğlu
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Erciyes University, Kayseri, Turkey
- Betül-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkey
| | - Tuğbagül Çal Doğan
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Sevtap Aydın Dilsiz
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Hande Canpınar
- Department of Basic Oncology, Institute of Cancer, Hacettepe University, Ankara, Turkey
| | - Ayşe Eken
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Erciyes University, Kayseri, Turkey
| | - Ülkü Ündeğer Bucurgat
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
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2
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Cusack R, Leone M, Rodriguez AH, Martin-Loeches I. Endothelial Damage and the Microcirculation in Critical Illness. Biomedicines 2022; 10:biomedicines10123150. [PMID: 36551905 PMCID: PMC9776078 DOI: 10.3390/biomedicines10123150] [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: 11/08/2022] [Revised: 11/22/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022] Open
Abstract
Endothelial integrity maintains microcirculatory flow and tissue oxygen delivery. The endothelial glycocalyx is involved in cell signalling, coagulation and inflammation. Our ability to treat critically ill and septic patients effectively is determined by understanding the underpinning biological mechanisms. Many mechanisms govern the development of sepsis and many large trials for new treatments have failed to show a benefit. Endothelial dysfunction is possibly one of these biological mechanisms. Glycocalyx damage is measured biochemically. Novel microscopy techniques now mean the glycocalyx can be indirectly visualised, using sidestream dark field imaging. How the clinical visualisation of microcirculation changes relate to biochemical laboratory measurements of glycocalyx damage is not clear. This article reviews the evidence for a relationship between clinically evaluable microcirculation and biological signal of glycocalyx disruption in various diseases in ICU. Microcirculation changes relate to biochemical evidence of glycocalyx damage in some disease states, but results are highly variable. Better understanding and larger studies of this relationship could improve phenotyping and personalised medicine in the future. Damage to the glycocalyx could underpin many critical illness pathologies and having real-time information on the glycocalyx and microcirculation in the future could improve patient stratification, diagnosis and treatment.
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Affiliation(s)
- Rachael Cusack
- Department of Intensive Care Medicine, St. James’s Hospital, James’s Street, D08 NHY1 Dublin, Ireland
- School of Medicine, Trinity College Dublin, College Green, D02 R590 Dublin, Ireland
| | - Marc Leone
- Department of Anaesthesiology and Intensive Care Unit, Hospital Nord, Assistance Publique Hôpitaux de Marseille, Aix Marseille University, 13015 Marseille, France
| | - Alejandro H. Rodriguez
- Intensive Care Unit, Hospital Universitario Joan XXIII, 43005 Tarragona, Spain
- Institut d’Investigació Sanitària Pere Virgil, 43007 Tarragona, Spain
- Departament Medicina I Cirurgia, Universitat Rovira i Virgili, 43003 Tarragona, Spain
- Centro de Investigación en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Ignacio Martin-Loeches
- Department of Intensive Care Medicine, St. James’s Hospital, James’s Street, D08 NHY1 Dublin, Ireland
- School of Medicine, Trinity College Dublin, College Green, D02 R590 Dublin, Ireland
- Correspondence:
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3
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Role of Endothelial Glucocorticoid Receptor in the Pathogenesis of Kidney Diseases. Int J Mol Sci 2021; 22:ijms222413295. [PMID: 34948091 PMCID: PMC8706765 DOI: 10.3390/ijms222413295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/05/2021] [Accepted: 12/07/2021] [Indexed: 01/12/2023] Open
Abstract
Glucocorticoids, as multifunctional hormones, are widely used in the treatment of various diseases including nephrological disorders. They are known to affect immunological cells, effectively treating many autoimmune and inflammatory processes. Furthermore, there is a growing body of evidence demonstrating the potent role of glucocorticoids in non-immune cells such as podocytes. Moreover, novel data show additional pathways and processes affected by glucocorticoids, such as the Wnt pathway or autophagy. The endothelium is currently considered as a key organ in the regulation of numerous kidney functions such as glomerular filtration, vascular tone and the regulation of inflammation and coagulation. In this review, we analyse the literature concerning the effects of endothelial glucocorticoid receptor signalling on kidney function in health and disease, with special focus on hypertension, diabetic kidney disease, glomerulopathies and chronic kidney disease. Recent studies demonstrate the potential role of endothelial GR in the prevention of fibrosis of kidney tissue and cell metabolism through Wnt pathways, which could have a protective effect against disease progression. Another important aspect covered in this review is blood pressure regulation though GR and eNOS. We also briefly cover potential therapies that might affect the endothelial glucocorticoid receptor and its possible clinical implications, with special interest in selective or local GR stimulation and potential mitigation of GC treatment side effects.
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4
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Inoue T, Murakami S, Matsumoto K, Matsuda A. Functional benefits of corticosteroid and IVIG combination therapy in a coronary artery endothelial cell model of Kawasaki disease. Pediatr Rheumatol Online J 2020; 18:76. [PMID: 33023630 PMCID: PMC7539408 DOI: 10.1186/s12969-020-00461-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 09/03/2020] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Kawasaki disease (KD) is the most common pediatric systemic vasculitides of unknown etiology. Recent clinical studies led to reappraisal of the usefulness of initial combination therapy of intravenous immunoglobulin (IVIG) plus a corticosteroid for patients with severe KD. However, the molecular mechanisms underlying the clinical benefits of that combination therapy remain unclear. Here, we used cultured human coronary artery endothelial cells (HCAECs), as a mimic of KD, to study the possible mechanisms responsible for the clinical benefits of adding a corticosteroid to standard IVIG therapy for patients with severe KD. METHODS HCAECs were stimulated with TNF-α, IL-1α or IL-1β in the presence and absence of high-dose IgG and/or dexamethasone (DEX). The mRNA and protein concentrations for high-mobility group box-1 (HMGB1), IL-1α, IL-6 and granulocyte-colony stimulating factor (G-CSF) in the culture supernatants were measured by quantitative PCR (qPCR) and ELISA, respectively. Apoptosis was evaluated by the caspase 3/7 activities. RESULTS DEX, but not IgG, significantly inhibited apoptosis caused by inflammatory stimuli, resulting in effective reduction of HMGB1 and IL-1α protein release by HCAECs. As previously reported, DEX or IgG alone significantly suppressed TNF-α-induced production of IL-6 and G-CSF and mRNA expression, but induction of those cytokines by IL-1 s (IL-1α and IL-1β) was resistant to high-dose IgG. CONCLUSIONS A corticosteroid can effectively inhibit the release of HMGB1 and IL-1α, which may be involved in IVIG resistance in KD. Since high-dose IgG does not have such beneficial anti-cytotoxic effects, adding a corticosteroid to standard IVIG therapy may help prevent the progression of IVIG resistance in KD.
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Affiliation(s)
- Takashi Inoue
- grid.63906.3a0000 0004 0377 2305Department of Allergy and Clinical Immunology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo, 157-8535 Japan ,grid.411898.d0000 0001 0661 2073Department of Pediatrics, Jikei University School of Medicine, Tokyo, Japan
| | - Shokei Murakami
- grid.63906.3a0000 0004 0377 2305Department of Allergy and Clinical Immunology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo, 157-8535 Japan ,grid.267346.20000 0001 2171 836XDepartment of Pediatrics, Toyama University School of Medicine, Toyama, Japan
| | - Kenji Matsumoto
- grid.63906.3a0000 0004 0377 2305Department of Allergy and Clinical Immunology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo, 157-8535 Japan
| | - Akio Matsuda
- Department of Allergy and Clinical Immunology, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo, 157-8535, Japan.
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5
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Endo Y, Funayama H, Yamaguchi K, Monma Y, Yu Z, Deng X, Oizumi T, Shikama Y, Tanaka Y, Okada S, Kim S, Kiyama T, Bando K, Shima K, Suzuki H, Takahashi T. [Basic Studies on the Mechanism, Prevention, and Treatment of Osteonecrosis of the Jaw Induced by Bisphosphonates]. YAKUGAKU ZASSHI 2020; 140:63-79. [PMID: 31902887 DOI: 10.1248/yakushi.19-00125] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Since the first report in 2003, bisphosphonate-related osteonecrosis of the jaw (BRONJ) has been increasing, without effective clinical strategies. Osteoporosis is common in elderly women, and bisphosphonates (BPs) are typical and widely used anti-osteoporotic or anti-bone-resorptive drugs. BRONJ is now a serious concern in dentistry. As BPs are pyrophosphate analogues and bind strongly to bone hydroxyapatite, and the P-C-P structure of BPs is non-hydrolysable, they accumulate in bones upon repeated administration. During bone-resorption, BPs are taken into osteoclasts and exhibit cytotoxicity, producing a long-lasting anti-bone-resorptive effect. BPs are divided into nitrogen-containing BPs (N-BPs) and non-nitrogen-containing BPs (non-N-BPs). N-BPs have far stronger anti-bone-resorptive effects than non-N-BPs, and BRONJ is caused by N-BPs. Our murine experiments have revealed the following. N-BPs, but not non-N-BPs, exhibit direct and potent inflammatory/necrotic effects on soft-tissues. These effects are augmented by lipopolysaccharide (the inflammatory component of bacterial cell-walls) and the accumulation of N-BPs in jawbones is augmented by inflammation. N-BPs are taken into soft-tissue cells via phosphate-transporters, while the non-N-BPs etidronate and clodronate inhibit this transportation. Etidronate, but not clodronate, has the effect of expelling N-BPs that have accumulated in bones. Moreover, etidronate and clodronate each have an analgesic effect, while clodronate has an anti-inflammatory effect via inhibition of phosphate-transporters. These findings suggest that BRONJ may be induced by phosphate-transporter-mediated and infection-promoted mechanisms, and that etidronate and clodronate may be useful for preventing and treating BRONJ. Our clinical trials support etidronate being useful for treating BRONJ, although additional clinical trials of etidronate and clodronate are needed.
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Affiliation(s)
- Yasuo Endo
- Divisions of Pharmacology, Graduate School of Dentistry, Tohoku University.,Divisions of Molecular Regulation, Graduate School of Dentistry, Tohoku University.,Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Hiromi Funayama
- Divisions of Pediatric Dentistry, Graduate School of Dentistry, Tohoku University.,Department of Pediatric Dentistry, Tsurumi University School of Dental Medicine
| | - Kouji Yamaguchi
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Yuko Monma
- Divisions of Pediatric Dentistry, Graduate School of Dentistry, Tohoku University
| | - Zhiqian Yu
- Divisions of Oral Diagnosis, Graduate School of Dentistry, Tohoku University
| | - Xue Deng
- Divisions of Oral Diagnosis, Graduate School of Dentistry, Tohoku University
| | - Takefumi Oizumi
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Yosuke Shikama
- Divisions of Periodontology and Endodontology, Graduate School of Dentistry, Tohoku University
| | - Yukinori Tanaka
- Divisions of Molecular Regulation, Graduate School of Dentistry, Tohoku University
| | - Satoshi Okada
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Siyoung Kim
- Divisions of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University
| | - Tomomi Kiyama
- Divisions of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University
| | - Kanan Bando
- Divisions of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University
| | - Kazuhiro Shima
- Divisions of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University
| | - Hikari Suzuki
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Tetsu Takahashi
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
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6
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Moreno-Fernandez J, Díaz-Castro J, Alférez MJM, López-Aliaga I. Iron Deficiency and Neuroendocrine Regulators of Basal Metabolism, Body Composition and Energy Expenditure in Rats. Nutrients 2019; 11:nu11030631. [PMID: 30875895 PMCID: PMC6470997 DOI: 10.3390/nu11030631] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/10/2019] [Accepted: 03/12/2019] [Indexed: 12/21/2022] Open
Abstract
Although dietary iron is a determinant of iron status in animals, body fat mass has been reported to have an inverse association with iron status in human studies. The goal of this study was to determine the relationship between Fe homeostasis, body composition, energy expenditure and neuroendocrine regulators for severe Fe-deficiency anaemia. Forty male Wistar albino rats recently weaned were divided at random into two groups: the control group was fed the basal diet, AIN-93G diet (normal-Fe) and the anaemic group received a low-Fe diet for 40 days. Neuroendocrine parameters that regulate basal metabolism and appetite (thyroid hormones, ghrelin, glucose-dependent insulinotropic polypeptide (GIP), glucagon, insulin, adrenocorticotropic hormone and corticosterone), body composition, respiratory volumes, energy expenditure, haematological and biochemical were assessed. Total body fat was lower, whereas lean mass, free and total water were higher in the anemic group. O2 consumption, CO2 production, energy expenditure (EE) and respiratory quotient (RQ) were lower in the Fe-deficient animals. Triiodothyronine and thyroxine hormones decreased, while thyroid-stimulating hormone increased in the anemic group. Circulating levels of ghrelin were lower in the anemic group, while GIP, glucagon, insulin, corticosterone and adrenocorticotropic hormone levels were higher. Fe-deficiency impairs weight gain in the rats, with marked reductions in lean mass and body fat, indicating lower energy stores.
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Affiliation(s)
- Jorge Moreno-Fernandez
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
| | - Javier Díaz-Castro
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
| | - María J M Alférez
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
| | - Inmaculada López-Aliaga
- Department of Physiology (Faculty of Pharmacy, Campus Universitario de Cartuja) and Institute of Nutrition and Food Technology "José Mataix", University of Granada, E-18071 Granada, Spain.
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7
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Endo Y, Kumamoto H, Nakamura M, Sugawara S, Takano-Yamamoto T, Sasaki K, Takahashi T. Underlying Mechanisms and Therapeutic Strategies for Bisphosphonate-Related Osteonecrosis of the Jaw (BRONJ). Biol Pharm Bull 2018; 40:739-750. [PMID: 28566618 DOI: 10.1248/bpb.b16-01020] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bisphosphonates (BPs), with a non-hydrolysable P-C-P structure, are cytotoxic analogues of pyrophosphate, bind strongly to bone, are taken into osteoclasts during bone-resorption and exhibit long-acting anti-bone-resorptive effects. Among the BPs, nitrogen-containing BPs (N-BPs) have far stronger anti-bone-resorptive effects than non-N-BPs. In addition to their pyrogenic and digestive-organ-injuring side effects, BP-related osteonecrosis of jaws (BRONJ), mostly caused by N-BPs, has been a serious concern since 2003. The mechanism underlying BRONJ has proved difficult to unravel, and there are no solid strategies for treating and/or preventing BRONJ. Our mouse experiments have yielded the following results. (a) N-BPs, but not non-N-BPs, exhibit direct inflammatory and/or necrotic effects on soft tissues. (b) These effects are augmented by lipopolysaccharide, a bacterial-cell-wall component. (c) N-BPs are transported into cells via phosphate transporters. (d) The non-N-BPs etidronate (Eti) and clodronate (Clo) competitively inhibit this transportation (potencies, Clo>Eti) and reduce and/or prevent the N-BP-induced inflammation and/or necrosis. (e) Eti, but not Clo, can expel N-BPs that have accumulated within bones. (f) Eti and Clo each have an analgesic effect (potencies, Clo>Eti) via inhibition of phosphate transporters involved in pain transmission. From these findings, we propose that phosphate-transporter-mediated and inflammation/infection-promoted mechanisms underlie BRONJ. To treat and/or prevent BRONJ, we propose (i) Eti as a substitution drug for N-BPs and (ii) Clo as a combination drug with N-BPs while retaining their anti-bone-resorptive effects. Our clinical trials support this role for Eti (we cannot perform such trials using Clo because Clo is not clinically approved in Japan).
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Affiliation(s)
- Yasuo Endo
- Division of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Hiroyuki Kumamoto
- Division of Oral Pathology, Graduate School of Dentistry, Tohoku University
| | - Masanori Nakamura
- Department of Oral Anatomy and Developmental Biology, School of Dentistry, Showa University
| | - Shunji Sugawara
- Division of Oral Molecular Regulation, Graduate School of Dentistry, Tohoku University
| | - Teruko Takano-Yamamoto
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University
| | - Tetsu Takahashi
- Division of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
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Moreno-Fernandez J, Diaz-Castro J, Alférez MJM, Nestares T, Ochoa JJ, Sánchez-Alcover A, López-Aliaga I. Fermented goat milk consumption improves melatonin levels and influences positively the antioxidant status during nutritional ferropenic anemia recovery. Food Funct 2016; 7:834-42. [PMID: 26662041 DOI: 10.1039/c5fo01299f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of the current study was to assess the influence of fermented goat or cow milk on melatonin levels and antioxidant status and during anemia recovery. Eighty male Wistar rats were placed on a pre-experimental period of 40 days and randomly divided into two groups, a control group receiving normal-Fe diet (45 mg kg(-1)) and the Fe-deficient group receiving low-Fe diet (5 mg kg(-1)). Then, the rats were fed with fermented goat or cow milk-based diets with a normal-Fe content or Fe-overload (450 mg kg(-1)) for 30 days. After 30 days of feeding the fermented milks, the total antioxidant status (TAS) was higher in both groups of animals fed fermented goat milk with the normal-Fe content. Plasma and urine 8-OHdG were lower in control and anemic rats fed fermented goat milk. Melatonin and corticosterone increased in the anemic groups during Fe replenishment with both fermented milks. Urine isoprostanes were lower in both groups fed fermented goat milk. Lipid and protein oxidative damage were higher in all tissues with fermented cow milk. During anemia instauration, an increase in melatonin was observed, a fact that would improve the energy metabolism and impaired inflammatory signaling, however, during anemia recovery, fermented goat milk had positive effects on melatonin and TAS, even in the case of Fe-overload, limiting the evoked oxidative damage.
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Affiliation(s)
- Jorge Moreno-Fernandez
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Javier Diaz-Castro
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - M José M Alférez
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Teresa Nestares
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Julio J Ochoa
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Ana Sánchez-Alcover
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
| | - Inmaculada López-Aliaga
- Department of Physiology, University of Granada, Granada, Spain and Institute of Nutrition and Food Technology "José Mataix Verdú", University of Granada, Granada, Spain.
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9
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Liu X, Cheng YI, Pan QI, Hu W, Xu LI, Meng X, Wu J, Xie C, Yan H, Sun Z. Changes in mitotic reorientation and Wnt/AR signaling in rat prostate epithelial cells exposed to subchronic testosterone. Exp Ther Med 2016; 11:1361-1366. [PMID: 27073450 DOI: 10.3892/etm.2016.3044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 09/18/2015] [Indexed: 12/22/2022] Open
Abstract
The aim of the present study was to investigate the changes in mitotic reorientation and relative differential gene expression in rat prostate epithelial cells following long-term exposure to testosterone propionate (TP). Sprague-Dawley rats were randomly divided into two groups as follows: TP group, which received 3.7 mg/kg/day TP for 30 days (n=10); and control group, in which rats were injected with olive oil (n=10). Microscopic analysis of the prostate tissue was performed by immunohistochemical analysis and hematoxylin and eosin staining. Differential gene expression analysis was performed via gene microarray, and a total of five genes (Dkk3, Ran, Fas, Tgm4 and Wnt2) were selected and their expression levels were verified using reverse transcription-polymerase chain reaction. For rats treated with TP, mitosis was significantly reoriented, becoming parallel to the basement membrane. By contrast, in the control group cells mitotic orientation remained perpendicular to the basement membrane. Genes such as Ran and Tgm4 in the androgen receptor (AR) signaling pathway and Wnt2 in the Wnt signaling pathway, were upregulated following treatment with TP. Conversely, the Dkk3 and Fas genes were downregulated following treatment with TP. In conclusion, mitotic orientation of prostate epithelial cells was altered following long-term administration of TP. Wnt and AR signaling pathways influenced cell proliferation and may have participated in the mitotic orientation change.
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Affiliation(s)
- Xiangyun Liu
- Key Laboratory of Exercise and Health Sciences (Shanghai University of Sport), Ministry of Education, Shanghai 200438, P.R. China
| | - Y I Cheng
- Laboratory Testing Division, WuXi AppTec (Shanghai) Co., Ltd., Shanghai 200131, P.R. China
| | - Q I Pan
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, P.R. China
| | - Wenjuan Hu
- Department of Pharmacy, Shanghai Children's Hospital, Shanghai Jiatong University, Shanghai 200040, P.R. China
| | - L I Xu
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, P.R. China
| | - Xiang Meng
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, P.R. China
| | - Jianhui Wu
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, P.R. China
| | - Chenjing Xie
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, P.R. China
| | - Han Yan
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, P.R. China
| | - Zuyue Sun
- Department of Pharmacology and Toxicology, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, P.R. China
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10
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Characterization of Endothelial Microparticles Induced by Different Therapeutic Drugs for Infantile Hemangioma. J Cardiovasc Pharmacol 2015; 66:261-9. [DOI: 10.1097/fjc.0000000000000273] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Li X, Liu X, Xu Y, He Y, Liu J, Xie M. Expression profile of apoptotic and proliferative proteins in hypoxic HUVEC treated with statins. Int J Oncol 2014; 46:677-84. [PMID: 25434456 DOI: 10.3892/ijo.2014.2780] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Accepted: 11/06/2014] [Indexed: 11/06/2022] Open
Abstract
Vascular endothelial hyperproliferation is involved in the pathophysiological process of angiogenesis, which is indispensable for tumor growth and spread in hypoxic adaptation. There is increasing evidence indicating that statins have potential anti-angiogenesis benefits. However, the intracellular signaling mechanism underlying the effect of statins in vascular endothelial cells is undefined. The present study was conducted to investigate the effect of fluvastatin on cell proliferation and apoptosis in normoxic and hypoxic human umbilical vein endothelial cells (HUVEC). Flow cytometric analyses revealed that statins reversed hypoxia-induced cell proliferation by slowing down G1 to S transition and inducing cell apoptosis. To get further insights into the downstream effects of statins, we measured the expression of various apoptosis-associated proteins in hypoxic HUVEC using human apoptosis antibody array. The results suggested that cell apoptosis was accompanied by upregulation of caspase-3, p27, IGFBP-6 and a decrease of bcl-2, survivin levels. Subsequent studies confirmed the results of array and demonstrated that fluvastatin activated mitochondrial apoptosis through enhancing bax/bcl-2 ratio, releasing cytochrome c, in turn activating caspase-9 and caspase-3, and eventually cleaving PARP. Further experiments showed that inhibition of cell proliferation by fluvastatin was associated with elevated IGFBP-6, p27, p53 levels and reduced survivin, cyclin B1, cyclin D1 and VEGF expression. Taken together, fluvastatin suppressed cell proliferation and induced apoptosis of HUVEC in hypoxia via multiple signaling pathways, providing a theoretical basis for statins in the therapy of cancer.
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Affiliation(s)
- Xiaochen Li
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Xiansheng Liu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Yongjian Xu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Yuanzhou He
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Jin Liu
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
| | - Min Xie
- Department of Respiratory and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China
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12
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Pokrovskaya O, Wallace D, O’Brien C. The Emerging Role of Statins in Glaucoma Pathological Mechanisms and Therapeutics. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ojoph.2014.44021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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13
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Gruver-Yates AL, Cidlowski JA. Tissue-specific actions of glucocorticoids on apoptosis: a double-edged sword. Cells 2013; 2:202-23. [PMID: 24709697 PMCID: PMC3972684 DOI: 10.3390/cells2020202] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 03/05/2013] [Accepted: 03/12/2013] [Indexed: 12/20/2022] Open
Abstract
First described for their metabolic and immunosuppressive effects, glucocorticoids are widely prescribed in clinical settings of inflammation. However, glucocorticoids are also potent inducers of apoptosis in many cell types and tissues. This review will focus on the established mechanisms of glucocorticoid-induced apoptosis and outline what is known about the apoptotic response in cells and tissues of the body after exposure to glucocorticoids. Glucocorticoid-induced apoptosis affects the skeletal system, muscular system, circulatory system, nervous system, endocrine system, reproductive system, and the immune system. Interestingly, several cell types have an anti-apoptotic response to glucocorticoids that is cytoprotective. Lastly, we will discuss the pro- and anti-apoptotic effects of glucocorticoids in cancers and their clinical implications.
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Affiliation(s)
- Amanda L Gruver-Yates
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, 111 T. W. Alexander Drive, Research Triangle Park, NC 27709, USA.
| | - John A Cidlowski
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, 111 T. W. Alexander Drive, Research Triangle Park, NC 27709, USA.
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14
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Hu W, Zhou X, Jiang M, Duan Y, Chen Y, Li X, Yin Z, He GW, Yao Z, Zhu Y, Hajjar DP, Han J. Statins synergize dexamethasone-induced adipocyte fatty acid binding protein expression in macrophages. Atherosclerosis 2012; 222:434-43. [DOI: 10.1016/j.atherosclerosis.2012.03.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Revised: 03/06/2012] [Accepted: 03/06/2012] [Indexed: 12/30/2022]
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15
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Ra JE, Lee JK, Kim HJ. Simvastatin as a Modulator of Tissue Remodeling through Inhibition of Matrix Metalloproteinase (MMP) Release from Human Lung Fibroblasts. Tuberc Respir Dis (Seoul) 2011. [DOI: 10.4046/trd.2011.71.3.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Ji Eun Ra
- Department of Internal Medicine, Wonkwang University Sanbon Hospital, Wonkwang University College of Medicine, Gunpo, Korea
| | - Ji Kyoung Lee
- Department of Internal Medicine, Wonkwang University Sanbon Hospital, Wonkwang University College of Medicine, Gunpo, Korea
| | - Hui Jung Kim
- Department of Internal Medicine, Wonkwang University Sanbon Hospital, Wonkwang University College of Medicine, Gunpo, Korea
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16
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Yamaguchi K, Oizumi T, Funayama H, Kawamura H, Sugawara S, Endo Y. Osteonecrosis of the Jawbones in 2 Osteoporosis Patients Treated With Nitrogen-Containing Bisphosphonates: Osteonecrosis Reduction Replacing NBP With Non-NBP (Etidronate) and Rationale. J Oral Maxillofac Surg 2010; 68:889-97. [DOI: 10.1016/j.joms.2009.04.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Accepted: 04/21/2009] [Indexed: 01/14/2023]
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17
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Oizumi T, Funayama H, Yamaguchi K, Yokoyama M, Takahashi H, Yamamoto M, Kuroishi T, Kumamoto H, Sasaki K, Kawamura H, Sugawara S, Endo Y. Inhibition of necrotic actions of nitrogen-containing bisphosphonates (NBPs) and their elimination from bone by etidronate (a non-NBP): a proposal for possible utilization of etidronate as a substitution drug for NBPs. J Oral Maxillofac Surg 2010; 68:1043-54. [PMID: 20156665 DOI: 10.1016/j.joms.2009.08.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 06/25/2009] [Accepted: 08/28/2009] [Indexed: 10/19/2022]
Abstract
PURPOSE Nitrogen-containing bisphosphonates (NBPs) have powerful anti-bone-resorptive effects (ABREs). However, recent clinical applications have disclosed an unexpected side effect, osteonecrosis of the jaw. We previously found in mice that etidronate (a non-NBP), when coadministered with alendronate (an NBP), inhibited the latter's inflammatory effects. However, etidronate also reduced the ABRE of alendronate. The present study examined in mice the modulating effects of etidronate on the inflammatory and necrotic actions of zoledronate (the NBP with the strongest anti-bone-resorptive activity and the highest incidence of osteonecrosis of the jaw) and on ABREs of various NBPs including zoledronate. MATERIALS AND METHODS NBPs were subcutaneously injected into ear pinnas of mice and ensuing inflammation and necrosis at the site of the injection were evaluated. ABREs of NBPs were evaluated by analyzing sclerotic bands induced in mouse tibias. RESULTS Coinjection of etidronate reduced inflammatory and necrotic reactions induced by zoledronate, and also reduced the amount of zoledronate retained within the ear tissue. When both agents were intraperitoneally injected, etidronate reduced the ABRE of zoledronate and those of other NBPs. Notably, etidronate reduced the ABRE of zoledronate even when this non-NBP was injected 16 hours after the injection of zoledronate. Bone scintigram indicated that etidronate reduced the amount of zoledronate that had already bound to bone. CONCLUSIONS These results suggest that etidronate may 1) inhibit the entry of NBPs into cells related to inflammation and/or necrosis, 2) inhibit the binding of NBPs to bone hydroxyapatite, 3) at least partly eliminate (or substitute for) NBPs that have already accumulated within bones, and thus 4) if used as a substitution drug for NBPs, be effective at treating or preventing NBP-associated osteonecrosis of the jaw.
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Affiliation(s)
- Takefumi Oizumi
- Department of Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University, Sendai, Japan
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18
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Haas MJ, Mooradian AD. Regulation of high-density lipoprotein by inflammatory cytokines: establishing links between immune dysfunction and cardiovascular disease. Diabetes Metab Res Rev 2010; 26:90-9. [PMID: 20047197 DOI: 10.1002/dmrr.1057] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Coronary artery disease is a primary co-morbidity in metabolic diseases such as metabolic syndrome, diabetes and obesity. One contributing risk factor for coronary artery disease is low high-density lipoprotein-cholesterol (HDLc). Several factors influence steady-state HDLc levels, including diet, genetics and environment. Perhaps more important to coronary artery disease is factors that attribute to the dynamics of reverse cholesterol transport, storage, and excretion of excess cholesterol. HDLc biogenesis, clearance and innate ability to serve as a cholesterol acceptor and transporter all contribute to HDLc's function as a negative regulator of cardiovascular disease. With the recent failure of torcetrapid, focus is being placed on HDLc biology and its role in various metabolic diseases. Low HDLc levels are often associated with an increased state of background inflammation. Recently, several syndromes with clear pro-inflammatory components have been shown to be inversely correlated with low HDLc levels in the absence of obesity, diabetes and metabolic syndrome. Early studies with HDLc during the acute-phase response suggest that HDLc is substantially physically modified during acute infection and sepsis, and recent studies show that HDLc is physically modified by chronic pro-inflammatory disease. In this review, several of these connections are described and cytokine signalling related to HDLc is examined.
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Affiliation(s)
- Michael J Haas
- Department of Medicine, University of Florida College of Medicine, 653-1 West Eighth Street, Jacksonville, FL 32209, USA.
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19
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Pammer J, Reinisch C, Kaun C, Tschachler E, Wojta J. Inhibitors of Differentiation/DNA Binding Proteins Id1 and Id3 Are Regulated by Statins in Endothelial Cells. ACTA ACUST UNITED AC 2009; 11:175-80. [PMID: 15370294 DOI: 10.1080/10623320490512192] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Id proteins (inhibitors of differentiation), which are involved in the control of cell cycle progression, can delay cellular differentiation and senescence and have been implicated in angiogenesis. The regulation of Id proteins in endothelial cells (ECs) by proangiogenic statins has not been investigated yet and remains unresolved. In this study, human dermal microvascular ECs (HDMECs) were stimulated with fluvastatin, vascular endothelial growth factor (VEGF), hepatocyte growth factor (HGF), and serum in vitro. The regulation of Id1, Id3, p21, p27, and p53 and the phosphorylation of AKT was investigated by Western blotting. Id1 was up-regulated by fluvastatin and serum, but not by VEGF and HGF. Fluvastatin did not regulate p21 and p27, but down-regulated Id3 and p53 slightly. In contrast to VEGF and HGF, fluvastatin did not result in AKT phosphorylation, indicating that this pathway is not involved in the control of endothelial Id1 expression. These experiments demonstrate for the first time that Id1 can be up-regulated and p53 down-regulated by a statin in HDMECs. Regulation of these proteins in ECs may account for the proangiogenic effect of statins.
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Affiliation(s)
- J Pammer
- Department of Clinical Pathology, Medical University of Vienna, Vienna, Austria
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20
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Xu Z, Lu G, Wu F. Simvastatin suppresses homocysteine-induced apoptosis in endothelial cells: roles of caspase-3, cIAP-1 and cIAP-2. Hypertens Res 2009; 32:375-80. [DOI: 10.1038/hr.2009.24] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Hadoke PWF, Iqbal J, Walker BR. Therapeutic manipulation of glucocorticoid metabolism in cardiovascular disease. Br J Pharmacol 2009; 156:689-712. [PMID: 19239478 DOI: 10.1111/j.1476-5381.2008.00047.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The therapeutic potential for manipulation of glucocorticoid metabolism in cardiovascular disease was revolutionized by the recognition that access of glucocorticoids to their receptors is regulated in a tissue-specific manner by the isozymes of 11beta-hydroxysteroid dehydrogenase. Selective inhibitors of 11beta-hydroxysteroid dehydrogenase type 1 have been shown recently to ameliorate cardiovascular risk factors and inhibit the development of atherosclerosis. This article addresses the possibility that inhibition of 11beta-hydroxsteroid dehydrogenase type 1 activity in cells of the cardiovascular system contributes to this beneficial action. The link between glucocorticoids and cardiovascular disease is complex as glucocorticoid excess is linked with increased cardiovascular events but glucocorticoid administration can reduce atherogenesis and restenosis in animal models. There is considerable evidence that glucocorticoids can interact directly with cells of the cardiovascular system to alter their function and structure and the inflammatory response to injury. These actions may be regulated by glucocorticoid and/or mineralocorticoid receptors but are also dependent on the 11beta-hydroxysteroid dehydrogenases which may be expressed in cardiac, vascular (endothelial, smooth muscle) and inflammatory (macrophages, neutrophils) cells. The activity of 11beta-hydroxysteroid dehydrogenases in these cells is dependent upon differentiation state, the action of pro-inflammaotory cytokines and the influence of endogenous inhibitors (oxysterols, bile acids). Further investigations are required to clarify the link between glucocorticoid excess and cardiovascular events and to determine the mechanism through which glucocorticoid treatment inhibits atherosclerosis/restenosis. This will provide greater insights into the potential benefit of selective 11beta-hydroxysteroid dehydrogenase inhibitors in treatment of cardiovascular disease.
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Affiliation(s)
- Patrick W F Hadoke
- Centre for Cardiovascular Sciences, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh, UK.
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22
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Yun JH, Henson PM, Tuder RM. Phagocytic clearance of apoptotic cells: role in lung disease. Expert Rev Respir Med 2008; 2:753-65. [PMID: 20477237 PMCID: PMC3956128 DOI: 10.1586/17476348.2.6.753] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Apoptosis and apoptotic clearance are matched processes that are centered in the maintenance of homeostasis. Similar to apoptosis, apoptotic cell clearance is a conserved mechanism that is highly efficient and redundant, highlighting its overall functional importance in homeostasis. Increasing evidence suggests that the mismatch between apoptosis and apoptotic cell clearance underlies pathologic conditions including inflammatory lung diseases, such as chronic obstructive pulmonary disease, cystic fibrosis, asthma, acute lung injury/acute respiratory distress syndrome and cancer immunity. Although direct causality has yet to be established, this paradigm opens novel approaches towards the understanding and treatment of lung diseases. Glucocorticoids, statins and macrolide antibiotics, which are already in use for treating lung conditions, have a positive effect on apoptotic clearance and are among novel agents that are potential candidates for treatment of these disorders.
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Affiliation(s)
- Jeong H Yun
- Program in Translational Lung Research, Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado at Denver, School of Medicine, 12700 East 19th Avenue, Aurora, CO 80045, USA, Tel.: +1 303 724 6049,
| | - Peter M Henson
- Department of Pediatrics, National Jewish Medical and Research Center, Denver, CO, USA, Tel.: +1 303 398 1380, Fax: +1 303 398 1381,
| | - Rubin M Tuder
- Program in Translational Lung Research, Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado at Denver, School of Medicine, 12700 East 19th Avenue, Aurora, CO 80045, USA, Tel.: +1 303 724 6062,
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23
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Xu SZ, Zhong W, Watson NM, Dickerson E, Wake JD, Lindow SW, Newton CJ, Atkin SL. Fluvastatin reduces oxidative damage in human vascular endothelial cells by upregulating Bcl-2. J Thromb Haemost 2008; 6:692-700. [PMID: 18221360 DOI: 10.1111/j.1538-7836.2008.02913.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND 3-Hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (statins) have been widely used in clinical practise and their efficacy in reducing cardiovascular risk has been well described. OBJECTIVES To investigate the effect of low doses of fluvastatin (nanomolar) on H(2)O(2)-induced cell damage and the underlying mechanism. METHODS AND RESULTS Primary cultures of human umbilical vein endothelial cells were used, and the effects of fluvastatin on H(2)O(2)-induced apoptosis, necrosis, and proliferation were observed. H(2)O(2) at a concentration of 100 mum significantly induced apoptotic cell death after 24-h cell culture. Fluvastatin at low concentrations (10-100 nm) prevented H(2)O(2)-induced apoptosis, as determined by a DNA fragmentation assay and by cell counting with trypan blue and Hoechst 33342 nuclei staining. The protective effect of fluvastatin was mediated by the upregulation of Bcl-2 expression as probed by real-time polymerase chain reaction and Western blotting. Using siRNA to knock down the expression of Bcl-2, the protective effect of fluvastatin was abolished. Fluvastatin had no direct effect on the H(2)O(2)-sensitive TRPM2 calcium channel. CONCLUSIONS These results suggest that fluvastatin has a potent protective effect against H(2)O(2)-induced apoptosis via upregulation of Bcl-2 expression. The findings provide a new insight into the mechanism by which fluvastatin is able to modulate the influence of oxidative stress on vascular endothelial cells.
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Affiliation(s)
- S Z Xu
- Postgraduate Medical Institute and Hull York Medical School, University of Hull, Hull, UK.
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24
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Kobayashi M, Kaido F, Kagawa T, Itagaki S, Hirano T, Iseki K. Preventive effects of bicarbonate on cerivastatin-induced apoptosis. Int J Pharm 2007; 341:181-8. [PMID: 17553641 DOI: 10.1016/j.ijpharm.2007.04.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2006] [Revised: 02/03/2007] [Accepted: 04/07/2007] [Indexed: 10/23/2022]
Abstract
Although HMG-CoA reductase inhibitors such as statins are the most widely used cholesterol-lowering agents, there is a risk of myopathy or rhabdmyolysis occurring in patients taking these drugs. It has been reported that a number of lipophilic statins cause apoptosis in various cells, but it is still not clear whether intracellular acidification is involved in statin-induced apoptosis. There have been few studies aimed at identifying compounds that suppress statin-induced myotoxicity. In the present study, we examined the relationship between cerivastatin-induced apoptosis and intracellular acidification and the effect of bicarbonate on cerivastatin-induced apoptosis using an RD cell line as a model of in vitro skeletal muscle. Cerivastatin reduced the number of viable cells and caused dramatic morphological changes and DNA fragmentation in a concentration-dependent manner. Moreover, cerivastatin-induced apoptosis was associated with intracellular acidification and caspase-9 and -3/7 activation. On the other hand, bicarbonate suppressed cerivastatin-induced pH alteration, caspase activation, morphological change and reduction of cell viability. Accordingly, bicarbonate suppressed statin-induced apoptosis. The strategy to combine statins with bicarbonate can lead to reduction in the chance of the severe adverse events including myopathy or rhabdmyolysis.
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Affiliation(s)
- Masaki Kobayashi
- Department of Clinical Pharmaceutics & Therapeutics, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12-jo, Nishi-6-chome, Kita-ku, Sapporo 060-0812, Japan
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25
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Caner M, Sonmez B, Kurnaz O, Aldemir C, Salar S, Altug T, Bilir A, Altinoz MA. Atorvastatin has cardiac safety at intensive cholesterol-reducing protocols for long term, yet its cancer-treatment doses with chemotherapy may cause cardiomyopathy even under coenzyme-Q10 protection. Cell Biochem Funct 2007; 25:463-72. [PMID: 16906597 DOI: 10.1002/cbf.1356] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Statins provide strong clinical benefits via reducing stroke deaths, and they are also considered for tumor reduction and chemo-sensitization. High dose atorvastatin in adults (80 mg daily, approx. 1 mg/kg) is proven to afford greater protection against cardiac deaths than does a standard lipid-lowering dose in coronary syndrome. For cancer trials, mega doses up to 30 mg/kg have been used for short term treatments but neither a high nor a mega-dose of atorvastatin has been tested for long term cardiac safety. This may be of special concern, since some animal studies showed deleterious effects of statins on cardiac tissue, which may be related with coenzymeQ (CoQ) depletion. We performed an electron microscopic analysis of rat hearts after low, high-or mega-dose atorvastatin therapy and with or without MNU (methyl-nitrosourea)-stress. MNU + daily high dose atorvastatin treatment for 13 months did not produce severe cardiac toxicity with CoQ. However, at mega doses (30 mg/kg) and with MNU, mitochondrial damage and myofibrillary disintegration was obvious. Strong proliferation of mitochondria under high dose atorvastatin therapy with CoQ may explain the lack of cardiotoxicity; and this finding seems to parallel recent data that statins induce HNF-4 and PPAR-alpha, both responsible for mitochondria-proliferation. Employment of statins for tumor chemo-sensitization at high-dosage and for long term treatments may require strategies to direct the mevalonate-entry differentially into cardiac and tumor cells and to develop a protocol analogous to folic acid salvage of methotrexate toxicity.
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Affiliation(s)
- Metin Caner
- Internal Medicine at Surgery, Department of Cerrahpasa School of Medicine, Istanbul University, Istanbul
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26
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Brand TC, Canby-Hagino ED, Pratap Kumar A, Ghosh R, Leach RJ, Thompson IM. Chemoprevention of prostate cancer. Hematol Oncol Clin North Am 2006; 20:831-43. [PMID: 16861117 DOI: 10.1016/j.hoc.2006.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Prostate cancer is a common malignancy with multiple potential opportunities for cancer prevention. As the genetic basis of this malignancy is further understood, prevention strategies will be developed for individual patients based on specific risk factors and pathways of carcinogenesis. The PCPT has conclusively proven that prostate cancer prevention is possible. The results of the SELECT should be available within several years. An enormous challenge for the medical community will be the development of an efficient strategy to evaluate the substantial number of dietary, behavioral, and pharmacologic prevention opportunities. Ultimately, the goal of prostate can-cer prevention is to (1) identify men who are destined to develop clinically significant prostate cancer, and (2) provide individualized agents to prevent disease development.
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Affiliation(s)
- Timothy C Brand
- University of Texas Health Science Center, San Antonio, TX 78229, USA
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27
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Lu H, Lei X, Klaassen C. Gender differences in renal nuclear receptors and aryl hydrocarbon receptor in 5/6 nephrectomized rats. Kidney Int 2006; 70:1920-8. [PMID: 16985511 DOI: 10.1038/sj.ki.5001880] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This study was aimed at delineating molecular pathways essential in gender-different pathogenesis of chronic kidney diseases (CKD). Renal transcripts of nuclear receptors and metabolic enzymes in male and female kidneys from 5/6 nephrectomized (Nx) rats 7 weeks post-Nx were examined using branched DNA signal amplification assay. Nx-males had marked kidney injury coupled with anemia and malnutrition. Nx-females had moderate renal injury, and were free of albuminuria, anemia, and malnutrition. Nx-males had systemic and renal inflammation, which were largely absent in Nx-females. Blood 17beta-estradiol, testosterone, and corticosterone did not change, whereas urinary testosterone decreased in both genders. Compared to males, female kidneys had higher androgen receptor (AR) and aryl hydrocarbon receptor (AhR) but lower estrogen receptor alpha (ERalpha). Compared to Nx-males, female remnant kidneys had less decreases in ERalpha and peroxisome proliferator-activated receptor alpha (PPARalpha), had no induction of AR and decrease of acyl-CoA oxidase, whereas had induction of cytochrome P450 4a1 (Cyp4a1) but decrease of AhR. Renal protein expression of a 52-kDa isoform of Wilm's tumor 1 (WT1), transcription factor critical in nephrogenesis, decreased dramatically in Nx-males but largely preserved in Nx-females. In conclusion, gender divergences in basal expression and alteration of ERalpha, AR, AhR, WT1, and PPARalpha/Cyp4a1 during CKD may explain gender differences in CKD progression and outcome of renal transplantation.
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Affiliation(s)
- H Lu
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas 66160-7417, USA
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28
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Guerard P, Rakotoniaina Z, Goirand F, Rochette L, Dumas M, Lirussi F, Bardou M. The HMG-CoA reductase inhibitor, pravastatin, prevents the development of monocrotaline-induced pulmonary hypertension in the rat through reduction of endothelial cell apoptosis and overexpression of eNOS. Naunyn Schmiedebergs Arch Pharmacol 2006; 373:401-14. [PMID: 16896805 DOI: 10.1007/s00210-006-0082-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2006] [Accepted: 05/29/2006] [Indexed: 01/17/2023]
Abstract
HMG-CoA reductase inhibitors improve endothelial function and exert antiproliferative effects on vascular smooth muscle cells of systemic vessels. This study was aimed to assess the protective effects of pravastatin (an HMG-CoA reductase inhibitor) against monocrotaline-induced pulmonary hypertension in rats. Pravastatin (PS, 10 mg/kg/day) or vehicle were given orally for 28 days to Wistar male rats injected or not with monocrotaline (MC, 60 mg/kg intraperitonealy) and treated or not by N(omega)-nitro-L-arginine methyl ester (L-NAME) 15 mg/kg/day. At 4 weeks, monocrotaline-injected rats developed severe pulmonary hypertension, with an increase in right ventricular pressure (RVP) and right ventricle/left ventricle+septum weight ratio (RV/LV+S), associated with a decrease in pulmonary artery dilation induced either by acetylcholine or sodium nitroprusside. Hypertensive pulmonary arteries exhibited an increase in medial thickness, medial wall area, endothelial cell apoptosis, and a decrease of endothelial nitric oxide synthase (eNOS) expression. Monocrotaline-rat lungs showed a significant decrease of eNOS expression (4080+/-27 vs 12189+/-761 arbitrary density units [ADU] for MC and control groups respectively, P<0.01) and a significant increase of cleaved caspase-3 expression by western blotting (Control=11628+/-2395 vs MC=2326+/-2243 ADU, P<0.05). A non-significant trend toward a reduced mortality was observed with pravastatin (relative risk of death = 0.33; 95% confidence interval [0.08-1.30], P= 0.12 for MC+PS vs MC groups). Pravastatine induced a protection against the development of the pulmonary hypertension (RVP in mmHg: 30+/-3 vs 45+/-4 and RV/LV+S: 0.46+/-0.04 vs 0.62+/-0.05 for MC+PS and MC groups respectively, P<0.05) and was associated with a significant reduction of MC-induced thickening (61+/-6 mum vs 81+/-3 mum for MC+PS and MC groups respectively, P= 0.01) of the medial wall of the small intrapulmonary arteries. Pravastatin partially restored acetylcholine-induced pulmonary artery vasodilation in MC rats (Emax=65+/-5% and 46+/-3% for MC+PS and MC group respectively, P<0.05) but had no effect on acetylcholine-induced pulmonary artery vasodilation in MC+L-NAME rats. It also prevented apoptosis and restored eNOS expression of pulmonary artery endothelial cells, as well as in the whole lung. Pravastatin reduces the development of monocrotaline-induced pulmonary hypertension and improves endothelium-dependent pulmonary artery relaxation, probably through a reduced apoptosis and a restored eNOS expression of endothelial cells.
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Affiliation(s)
- Pascal Guerard
- Laboratory of Experimental Cardiovascular Physiopathology and Pharmacology (EA2979), IFR 100 Faculty of Medicine, BP 87900, 21000, Dijon, France.
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Hothersall E, McSharry C, Thomson NC. Potential therapeutic role for statins in respiratory disease. Thorax 2006; 61:729-34. [PMID: 16877692 PMCID: PMC2104700 DOI: 10.1136/thx.2005.057976] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2005] [Accepted: 02/16/2006] [Indexed: 01/20/2023]
Abstract
Statins reduce cholesterol levels by inhibiting 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase and have an established role in the treatment of atherosclerotic disease. Recent research has identified anti-inflammatory properties of statins. Statins appear to reduce the stability of lipid raft formation with subsequent effects on immune activation and regulation, and also prevent the prenylation of signalling molecules with subsequent downregulation of gene expression. Both these effects result in reduced cytokine, chemokine, and adhesion molecule expression, with effects on cell apoptosis or proliferation. This review considers the evidence for the anti-inflammatory properties of statins in the lung, and how these effects are being applied to research into the role of statins as a novel treatment of respiratory diseases.
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Affiliation(s)
- E Hothersall
- Department of Respiratory Medicine, Division of Immunology, Infection and Inflammation, Western Infirmary and University of Glasgow, Glasgow G11 6NT, UK
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30
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Abstract
Statins have been shown to have pleiotropic effects apart from serum lipid-lowering effect in human. One of the major target organs for the effects of statins is the vascular endothelium, which plays an important role in the development of atherosclerosis and angiogenesis. Recent numerous studies have shown that the statins' cholesterol-independent vascular effects appear to involve directly restoring or improving endothelial function by increasing NO production, promoting re-endothelialization after arterial injury, and inhibiting inflammatory responses within the vessel wall that are thought to contribute to atherosclerosis. This review provides an update of the unique effects of statins on endothelial cells including endothelial progenitor cells as well as highlighting the therapeutic potential of statins beyond their established lipid-lowering effects.
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Affiliation(s)
- Masaaki Ii
- Stem Cell Translational Research, RIKEN Center for Developmental Biology, 2-2 Minatojima, Minamimachi, Kobe, Japan.
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31
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Son BK, Kozaki K, Iijima K, Eto M, Kojima T, Ota H, Senda Y, Maemura K, Nakano T, Akishita M, Ouchi Y. Statins protect human aortic smooth muscle cells from inorganic phosphate-induced calcification by restoring Gas6-Axl survival pathway. Circ Res 2006; 98:1024-31. [PMID: 16556867 DOI: 10.1161/01.res.0000218859.90970.8d] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Vascular calcification is clinically important in the development of cardiovascular disease. It is reported that hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase inhibitors (statins) inhibited vascular calcification in several clinical trials. However, the mechanism is poorly understood. Recently, it has been suggested that apoptosis is one of the important processes regulating vascular smooth muscle cell (VSMC) calcification. In this study, we investigated the effect of statins on VSMC calcification by testing their effect on apoptosis, focusing in particular on regulation of the survival pathway mediated by growth arrest-specific gene 6 (Gas6), a member of the vitamin K-dependent protein family, and its receptor, Axl. In human aortic smooth muscle cells (HASMC), statins significantly inhibited inorganic phosphate (Pi)-induced calcification in a concentration-dependent manner (reduced by 49% at 0.1 micromol/L atorvastatin). The inhibitory effect of statins was mediated by preventing apoptosis, which was increased by Pi in a concentration-dependent manner, and not by inhibiting sodium-dependent phosphate cotransporter (NPC) activity, another mechanism regulating HASMC calcification. Furthermore, the antiapoptotic effect of statins was dependent on restoration of Gas6, whose expression was downregulated by Pi. Restoration of Gas6 mRNA by statins was mediated by mRNA stabilization, and not by an increase in transcriptional activity. Suppression of Gas6 using small interfering RNA and the Axl-extracellular domain abolished the preventive effect of statins on Pi-induced apoptosis and calcification. These data demonstrate that statins protected HASMC from Pi-induced calcification by inhibiting apoptosis via restoration of the Gas6-Axl pathway.
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Affiliation(s)
- Bo-Kyung Son
- Department of Geriatric Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
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32
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Chave TA, Mortimer NJ, Sladden MJ, Hall AP, Hutchinson PE. Toxic epidermal necrolysis: current evidence, practical management and future directions. Br J Dermatol 2005; 153:241-53. [PMID: 16086734 DOI: 10.1111/j.1365-2133.2005.06721.x] [Citation(s) in RCA: 166] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Toxic epidermal necrolysis (TEN) is a rare disorder characterized by extensive epidermal death. Almost all cases appear to be caused by an idiosyncratic drug reaction. Proposed pathogenic mechanisms are conflicting, and the evidence for the benefits of individual treatments is inadequate, and in some cases contradictory. The mortality rate remains high. We review the literature pertaining to the pathogenesis of TEN and drug reactions in general. The rationale for therapeutic interventions, together with reported evidence of efficacy, are considered. We present a composite model of TEN, based on previous work and suggested pathogeneses of TEN, mechanisms of drug reactions and reported cytotoxic lymphocyte (CTL) cytolytic pathways. In this system, TEN, like some other cutaneous drug eruptions, is an HLA class I-restricted, specific drug sensitivity, resulting in clonal expansion of CD8+ CTLs. Cytotoxicity is mediated by CTL granzyme and possibly death receptor (DR) ligand (DR-L), probably Fas ligand (FasL). Particular to TEN, there is then an amplification sequence involving further DR-L expression. FasL is likely to be particularly important but tumour necrosis factor (TNF) may well contribute, via the TNF receptor 1 (TNF-R1) death pathway. Alternatively, we suggest the possibility of upregulation of an antiapoptotic TNF-R1-nuclear factor kappaB pathway, which would proscribe treatments which downregulate this pathway. None of the published data on individual treatment efficacies is sufficiently strong to suggest a definitive single treatment. Currently a multifaceted regimen appears indicated, targeting various likely intermediary mechanisms, including elimination of residual drug, immunosuppression, inhibition of DR pathways, general antiapoptotic strategies, and aggressive supportive care. Particular attention has been directed at avoiding potential conflicts between different treatments and avoiding agents that theoretically might have a net proapoptotic rather than antiapoptotic effect. Nursing on a specialized unit is of paramount importance.
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Affiliation(s)
- T A Chave
- Department of Dermatology, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester LE1 5WW, UK.
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Cyrus-David MS, Weinberg A, Thompson T, Kadmon D. THE EFFECT OF STATINS ON SERUM PROSTATE SPECIFIC ANTIGEN LEVELS IN A COHORT OF AIRLINE PILOTS: A PRELIMINARY REPORT. J Urol 2005; 173:1923-5. [PMID: 15879782 DOI: 10.1097/01.ju.0000158044.94188.88] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Reports of the effect of treatment with statins on prostate cancer risk are inconsistent. We performed a pilot study to assess the effect of statin treatment on a surrogate marker for prostate cancer risk, that is serum prostate specific antigen (PSA), in a cohort of airline pilots from 1992 to 2001. MATERIALS AND METHODS Subject medical records were abstracted for data on age, PSA testing, hyperlipidemia and treatment with statins. The treatment group was composed of 15 men with hypercholesterolemia who received statins and the comparison group of 85 with normal serum lipid levels during the review period. The mean +/- SD and the Wilcoxon rank sum test were used for analyses. RESULTS Serum PSA was significantly higher in the treatment group at baseline relative to the comparison group (p = 0.05). Interestingly there was no significant difference between the groups on subsequent followup. There was a 41.6% decrease in mean serum PSA in the treated group by visit 4. Simultaneously mean serum PSA increased by 38% in the untreated group. CONCLUSIONS Our results suggest that treatment with statins may lower serum PSA with time. These results must be confirmed in a larger study population while controlling for potential confounders. If validated, our observation provides a rationale for further studies of the role of this class of drugs for prostate cancer chemoprevention.
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Affiliation(s)
- Mfon S Cyrus-David
- Chronic Disease Prevention and Control Research Center, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
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Soehnlein O, Eskafi S, Schmeisser A, Kloos H, Daniel WG, Garlichs CD. Atorvastatin induces tissue transglutaminase in human endothelial cells. Biochem Biophys Res Commun 2004; 322:105-9. [PMID: 15313180 DOI: 10.1016/j.bbrc.2004.07.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2004] [Indexed: 10/26/2022]
Abstract
Tissue transglutaminase (tTgase) contributes to the organisation of the basement membrane and is therefore thought to be important for the integrity and stability of the vessel wall. In the present study, we hypothesised that the HMG-CoA reductase inhibitor atorvastatin may up-regulate the tTgase expression in endothelial cells and thereby exert beneficial effects on endothelial function. Treatment of human umbilical vein endothelial cells (HUVEC) with atorvastatin (1-10 microM) caused a clear increased expression of tTgase in both permeabilised and non-permeabilised HUVEC. In contrast, stimulation of HUVEC with TNFalpha had no substantial effect on tTgase expression or localisation but inhibited the atorvastatin-induced up-regulation and externalisation of tTgase. Propidium iodide staining revealed that statin-induced apoptosis is not responsible for the enhanced expression. By inducing the expression of tTgase, statins may promote tTgase-mediated stabilisation of the basement membrane. This effect of atorvastatin may contribute to the beneficial role of statins on endothelial function.
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Affiliation(s)
- Oliver Soehnlein
- Medical Clinic II, Friedrich-Alexander-University of Erlangen-Nuremberg, Ulmenweg 18, 91054 Erlangen, Germany
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Kubota T, Fujisaki K, Itoh Y, Yano T, Sendo T, Oishi R. Apoptotic injury in cultured human hepatocytes induced by HMG-CoA reductase inhibitors. Biochem Pharmacol 2004; 67:2175-86. [PMID: 15163549 DOI: 10.1016/j.bcp.2004.02.037] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2003] [Accepted: 02/03/2004] [Indexed: 12/21/2022]
Abstract
Hepatotoxicity is the major complaint during therapy with lipid-lowering agents such as statins, although the cellular mechanisms underlying the statin-induced liver injury are not fully understood. Using cultured human hepatocytes, we investigated the effects of lipophilic as well as hydrophilic statins on the cell viability. Lipophilic statins, including simvastatin, lovastatin, cerivastatin, fluvastatin and atorvastatin, reduced the viability of hepatocytes as assessed by the mitochondrial enzyme activity to reduce WST-8, however, a hydrophilic pravastatin did not cause cell injury. The simvastatin-induced loss of cell viability was attenuated by mevalonate or geranylgeranyl pyrophosphate. Simvastatin-induced DNA fragmentation and increased the number of cells stained with annexin V and terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling, both of which were reversed by caspase inhibitors such as zDEVD-fmk, zLEHD-fmk and zIETD-fmk. Consistent with these data, the activities of caspase-3, caspase-9 and caspase-8 were elevated by simvastatin. Simvastatin reduced the protein content and mRNA expression for bcl-2 without affecting bax mRNA expression. On the other hand, both lipophilic and hydrophilic statins significantly reduced the content of endogenous cholesterol. These findings suggest that lipophilic statins cause an apoptotic injury in human hepatocytes by stimulating caspase-3 subsequent to the activation of caspase-9 and caspase-8, in which the inhibition of 3-hydroxy-3-methylglutaryl coenzyme A reductase may be involved.
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Affiliation(s)
- Toshio Kubota
- Department of Pharmacy, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Jacklin A, Ratledge C, Welham K, Bilko D, Newton CJ. The sesame seed oil constituent, sesamol, induces growth arrest and apoptosis of cancer and cardiovascular cells. Ann N Y Acad Sci 2004; 1010:374-80. [PMID: 15033755 DOI: 10.1196/annals.1299.068] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Sesamol is a potent inhibitor of fungal fatty acid biosynthesis. This effect is apparently due to inhibition of malic enzyme and the supply of NADPH that is required for this biosynthetic pathway. It is the ability of sesamol to reduce the synthesis of the coenzyme, NADPH, that makes it attractive for use in studying the effect of oxidants on tumor and vascular endothelial cells. By conducting preliminary studies on the effect of sesamol alone, it was clear that the compound demonstrated marked cytotoxicity. This paper describes the experiments performed.
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Affiliation(s)
- Alix Jacklin
- Biological Sciences and Department of Chemistry, University of Hull, Hull, United Kingdom
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Tanaka K, Honda M, Takabatake T. ANTI-APOPTOTIC EFFECT OF ATORVASTATIN, A 3-HYDROXY-3-METHYLGLUTARYL COENZYME A REDUCTASE INHIBITOR, ON CARDIAC MYOCYTES THROUGH PROTEIN KINASE C ACTIVATION. Clin Exp Pharmacol Physiol 2004; 31:360-4. [PMID: 15191412 DOI: 10.1111/j.1440-1681.2004.04010.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Pleiotropic effects of statins, which are independent of lipid lowering, have been reported. In the present study, we examined the effect of a statin on apoptosis of adult rat cultured cardiac myocytes. We used the protein kinase C (PKC) inhibitors staurosporine (1 micro mol/L), chelerythrine (10 micro mol/L) and rottlerin (5 micro mol/L) to induce myocyte apoptosis. The effect of atorvastatin (10(-7) g/mL), a statin, on myocyte apoptosis induced by these PKC inhibitors was examined. All these PKC inhibitors markedly increased the percentage of terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end-labeling (TUNEL)-positive myocytes. This increase was significantly suppressed by atorvastatin treatment. Both chelerythrine and rottlerin induced subcellular translocation of PKCdelta and elevated caspase-3 activity in myocytes. The changes in the subcellular distribution of PKCdelta and caspase-3 activity induced by these PKC inhibitors were suppressed by atorvastatin treatment. The results of the present study suggest that the inhibitory effect of atorvastatin on apoptosis of adult rat cardiac myocytes induced by the PKC inhibitors is through activation of PKCdelta pathway.
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Affiliation(s)
- Koichi Tanaka
- The 4th Department of Internal Medicine, Shimane Medical University, Shimane, Japan
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Drucker L, Afensiev F, Radnay J, Shapira H, Lishner M. Co-administration of simvastatin and cytotoxic drugs is advantageous in myeloma cell lines. Anticancer Drugs 2004; 15:79-84. [PMID: 15090747 DOI: 10.1097/00001813-200401000-00012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We have evaluated the potential application of simvastatin (Sim) combined with conventional cytotoxic drugs for the treatment of multiple myeloma. RPMI 8226 and U266 myeloma cells seeded in culture plates were treated with Sim (5 and 10 microM, respectively) combined with melphalan (Mel; 25 and 20 microM, respectively) or dexamethasone (Dex; 1 microM). We assessed cell cycle (propidium iodide staining and flow cytometric analysis), cell morphology, viability (WST1), total cell count and cell death (Trypan blue exclusion). Sim significantly enhanced the anti-myeloma activity of cytotoxic agents in vitro (p<0.05). Incubation of U266 and RPMI 8226 with Sim prior to Mel increased the cytotoxicity in an additive manner, whereas the exposure of U266 to combined Sim and Dex resulted in a synergistic amplification of the individual effects. Combined application of Dex and Sim to RPMI 8226 cells resulted in antagonistic activity. The possible roles of Ras and phosphoinositol 3-kinase are discussed.
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Affiliation(s)
- Liat Drucker
- Oncogenetic Laboratory, Sapir Medical Center, Meir Hospital, Kfar Sava, Israel.
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