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Hou J, Lin Y, Zhu C, Chen Y, Lin R, Lin H, Liu D, Guan D, Yu B, Wang J, Wu H, Cui Z. Zwitterion-Lubricated Hydrogel Microspheres Encapsulated with Metformin Ameliorate Age-Associated Osteoarthritis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402477. [PMID: 38874373 DOI: 10.1002/advs.202402477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/17/2024] [Indexed: 06/15/2024]
Abstract
Chondrocyte senescence and reduced lubrication play pivotal roles in the pathogenesis of age-related osteoarthritis (OA). In the present study, highly lubricated and drug-loaded hydrogel microspheres are designed and fabricated through the radical polymerization of sulfobetaine (SB)-modified hyaluronic acid methacrylate using microfluidic technology. The copolymer contains a large number of SB and carboxyl groups that can provide a high degree of lubrication through hydration and form electrostatic loading interactions with metformin (Met@SBHA), producing a high drug load for anti-chondrocyte senescence. Mechanical, tribological, and drug release analyses demonstrated enhanced lubricative properties and prolonged drug dissemination of the Met@SBHA microspheres. RNA sequencing (RNA-seq) analysis, network pharmacology, and in vitro assays revealed the extraordinary capacity of Met@SBHA to combat chondrocyte senescence. Additionally, inducible nitric oxide synthase (iNOS) has been identified as a promising protein modulated by Met in senescent chondrocytes, thereby exerting a significant influence on the iNOS/ONOO-/P53 pathway. Notably, the intra-articular administration of Met@SBHA in aged mice ameliorated cartilage senescence and OA pathogenesis. Based on the findings of this study, Met@SBHA emerges as an innovative and promising strategy in tackling age-related OA serving the dual function of enhancing joint lubrication and mitigating cartilage senescence.
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Affiliation(s)
- Jiahui Hou
- Devision of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regeneration Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Yanpeng Lin
- Department of Radiology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Chencheng Zhu
- Devision of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regeneration Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Yupeng Chen
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Rongmin Lin
- Devision of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regeneration Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Hancheng Lin
- Devision of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regeneration Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Dahai Liu
- School of Medicine, Foshan University, Foshan, Guangdong, 528000, China
| | - Daogang Guan
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Bin Yu
- Devision of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regeneration Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Jun Wang
- School of Medicine, Foshan University, Foshan, Guangdong, 528000, China
| | - Hangtian Wu
- Devision of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regeneration Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
| | - Zhuang Cui
- Devision of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regeneration Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, 510515, China
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Zheng H, Xu Y, Liehn EA, Rusu M. Vitamin C as Scavenger of Reactive Oxygen Species during Healing after Myocardial Infarction. Int J Mol Sci 2024; 25:3114. [PMID: 38542087 PMCID: PMC10970003 DOI: 10.3390/ijms25063114] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/31/2024] [Accepted: 02/10/2024] [Indexed: 06/26/2024] Open
Abstract
Currently, coronary artery bypass and reperfusion therapies are considered the gold standard in long-term treatments to restore heart function after acute myocardial infarction. As a drawback of these restoring strategies, reperfusion after an ischemic insult and sudden oxygen exposure lead to the exacerbated synthesis of additional reactive oxidative species and the persistence of increased oxidation levels. Attempts based on antioxidant treatment have failed to achieve an effective therapy for cardiovascular disease patients. The controversial use of vitamin C as an antioxidant in clinical practice is comprehensively systematized and discussed in this review. The dose-dependent adsorption and release kinetics mechanism of vitamin C is complex; however, this review may provide a holistic perspective on its potential as a preventive supplement and/or for combined precise and targeted therapeutics in cardiovascular management therapy.
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Affiliation(s)
- Huabo Zheng
- Department of Cardiology, Angiology and Intensive Care, University Hospital, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany;
- Institute of Molecular Medicine, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark;
| | - Yichen Xu
- Institute of Molecular Medicine, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark;
- Department of Histology and Embryology, Medicine and Life Sciences, Hainan Medical University, Haikou 571199, China
| | - Elisa A. Liehn
- Institute of Molecular Medicine, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark;
- National Institute of Pathology “Victor Babes”, Splaiul Independentei Nr. 99-101, 050096 Bucharest, Romania
| | - Mihaela Rusu
- Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany
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3
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Hu XQ, Zhang L. Oxidative Regulation of Vascular Ca v1.2 Channels Triggers Vascular Dysfunction in Hypertension-Related Disorders. Antioxidants (Basel) 2022; 11:antiox11122432. [PMID: 36552639 PMCID: PMC9774363 DOI: 10.3390/antiox11122432] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/28/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
Blood pressure is determined by cardiac output and peripheral vascular resistance. The L-type voltage-gated Ca2+ (Cav1.2) channel in small arteries and arterioles plays an essential role in regulating Ca2+ influx, vascular resistance, and blood pressure. Hypertension and preeclampsia are characterized by high blood pressure. In addition, diabetes has a high prevalence of hypertension. The etiology of these disorders remains elusive, involving the complex interplay of environmental and genetic factors. Common to these disorders are oxidative stress and vascular dysfunction. Reactive oxygen species (ROS) derived from NADPH oxidases (NOXs) and mitochondria are primary sources of vascular oxidative stress, whereas dysfunction of the Cav1.2 channel confers increased vascular resistance in hypertension. This review will discuss the importance of ROS derived from NOXs and mitochondria in regulating vascular Cav1.2 and potential roles of ROS-mediated Cav1.2 dysfunction in aberrant vascular function in hypertension, diabetes, and preeclampsia.
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ROS and cGMP signaling modulate persistent escape from hypoxia in Caenorhabditis elegans. PLoS Biol 2022; 20:e3001684. [PMID: 35727855 PMCID: PMC9249223 DOI: 10.1371/journal.pbio.3001684] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/01/2022] [Accepted: 05/20/2022] [Indexed: 12/02/2022] Open
Abstract
The ability to detect and respond to acute oxygen (O2) shortages is indispensable to aerobic life. The molecular mechanisms and circuits underlying this capacity are poorly understood. Here, we characterize the behavioral responses of feeding Caenorhabditis elegans to approximately 1% O2. Acute hypoxia triggers a bout of turning maneuvers followed by a persistent switch to rapid forward movement as animals seek to avoid and escape hypoxia. While the behavioral responses to 1% O2 closely resemble those evoked by 21% O2, they have distinct molecular and circuit underpinnings. Disrupting phosphodiesterases (PDEs), specific G proteins, or BBSome function inhibits escape from 1% O2 due to increased cGMP signaling. A primary source of cGMP is GCY-28, the ortholog of the atrial natriuretic peptide (ANP) receptor. cGMP activates the protein kinase G EGL-4 and enhances neuroendocrine secretion to inhibit acute responses to 1% O2. Triggering a rise in cGMP optogenetically in multiple neurons, including AIA interneurons, rapidly and reversibly inhibits escape from 1% O2. Ca2+ imaging reveals that a 7% to 1% O2 stimulus evokes a Ca2+ decrease in several neurons. Defects in mitochondrial complex I (MCI) and mitochondrial complex I (MCIII), which lead to persistently high reactive oxygen species (ROS), abrogate acute hypoxia responses. In particular, repressing the expression of isp-1, which encodes the iron sulfur protein of MCIII, inhibits escape from 1% O2 without affecting responses to 21% O2. Both genetic and pharmacological up-regulation of mitochondrial ROS increase cGMP levels, which contribute to the reduced hypoxia responses. Our results implicate ROS and precise regulation of intracellular cGMP in the modulation of acute responses to hypoxia by C. elegans. The ability to detect and respond to acute oxygen shortages is indispensable to aerobic life, but the molecular mechanisms underlying this capacity are poorly understood. This study reveals that high levels of cGMP and reactive oxygen species (ROS) prevent the nematode Caenorhabditis elegans from escaping hypoxia.
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Saffi GT, Tang E, Mamand S, Inpanathan S, Fountain A, Salmena L, Botelho RJ. Reactive oxygen species prevent lysosome coalescence during PIKfyve inhibition. PLoS One 2021; 16:e0259313. [PMID: 34813622 PMCID: PMC8610251 DOI: 10.1371/journal.pone.0259313] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/16/2021] [Indexed: 11/19/2022] Open
Abstract
Lysosomes are terminal, degradative organelles of the endosomal pathway that undergo repeated fusion-fission cycles with themselves, endosomes, phagosomes, and autophagosomes. Lysosome number and size depends on balanced fusion and fission rates. Thus, conditions that favour fusion over fission can reduce lysosome numbers while enlarging their size. Conversely, favouring fission over fusion may cause lysosome fragmentation and increase their numbers. PIKfyve is a phosphoinositide kinase that generates phosphatidylinositol-3,5-bisphosphate to modulate lysosomal functions. PIKfyve inhibition causes an increase in lysosome size and reduction in lysosome number, consistent with lysosome coalescence. This is thought to proceed through reduced lysosome reformation and/or fission after fusion with endosomes or other lysosomes. Previously, we observed that photo-damage during live-cell imaging prevented lysosome coalescence during PIKfyve inhibition. Thus, we postulated that lysosome fusion and/or fission dynamics are affected by reactive oxygen species (ROS). Here, we show that ROS generated by various independent mechanisms all impaired lysosome coalescence during PIKfyve inhibition and promoted lysosome fragmentation during PIKfyve re-activation. However, depending on the ROS species or mode of production, lysosome dynamics were affected distinctly. H2O2 impaired lysosome motility and reduced lysosome fusion with phagosomes, suggesting that H2O2 reduces lysosome fusogenecity. In comparison, inhibitors of oxidative phosphorylation, thiol groups, glutathione, or thioredoxin, did not impair lysosome motility but instead promoted clearance of actin puncta on lysosomes formed during PIKfyve inhibition. Additionally, actin depolymerizing agents prevented lysosome coalescence during PIKfyve inhibition. Thus, we discovered that ROS can generally prevent lysosome coalescence during PIKfyve inhibition using distinct mechanisms depending on the type of ROS.
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Affiliation(s)
- Golam T. Saffi
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Evan Tang
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Sami Mamand
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Polytechnic Research Center, Erbil Polytechnic University, Kurdistan Regional Government, Erbil, Kurdistan
| | - Subothan Inpanathan
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Aaron Fountain
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
| | - Leonardo Salmena
- Department of Pharmacology & Toxicology, University of Toronto, Toronto, Ontario, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Roberto J. Botelho
- Molecular Science Graduate Program, Ryerson University, Toronto, Ontario, Canada
- Department of Chemistry and Biology, Ryerson University, Toronto, Ontario, Canada
- * E-mail:
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6
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Xue W, Men S, Liu R. Rotenone restrains the proliferation, motility and epithelial-mesenchymal transition of colon cancer cells and the tumourigenesis in nude mice via PI3K/AKT pathway. Clin Exp Pharmacol Physiol 2020; 47:1484-1494. [PMID: 32282954 PMCID: PMC7384028 DOI: 10.1111/1440-1681.13320] [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] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 03/15/2020] [Accepted: 03/30/2020] [Indexed: 12/13/2022]
Abstract
Rotenone, a toxic rotenoid compound, has anti‐tumour effects on several cancers. This study aims to clarify the effect of rotenone on the proliferation, apoptosis, invasion and migration of colon cancer cells and tumourigenesis in nude mice. The present results show that rotenone significantly inhibited the proliferation, promoted the apoptosis, and suppressed the invasion and migration of colon cancer cells in a dose‐dependent manner. Rotenone inhibited PI3K/AKT pathway in LoVo and SW480 cells in a dose‐dependent manner. In addition, rotenone regulated the proliferation, apoptosis, invasion, migration and EMT of LoVo and SW480 cells through PI3K/AKT pathway. In colon cancer xenograft mice, rotenone inhibited tumour volume and weight in nude mice, inhibited PI3K/AKT pathway and EMT in vivo. Therefore, rotenone inhibited the proliferation, invasion and migration, promoted the apoptosis of colon cancer cells through PI3K/AKT pathway in vitro, and suppressed the tumourigenesis in nude mice in vivo.
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Affiliation(s)
- Wusong Xue
- Department of Anoretal, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Siye Men
- Department of General Surgery, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Renghai Liu
- Department of Anoretal, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
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7
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Patel B, Zheleznova NN, Ray SC, Sun J, Cowley AW, O'Connor PM. Voltage gated proton channels modulate mitochondrial reactive oxygen species production by complex I in renal medullary thick ascending limb. Redox Biol 2019; 27:101191. [PMID: 31060879 PMCID: PMC6859587 DOI: 10.1016/j.redox.2019.101191] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 04/02/2019] [Accepted: 04/05/2019] [Indexed: 11/24/2022] Open
Abstract
Hv1 is a voltage-gated proton channel highly expressed in immune cells where, it acts to maintain NAD(P)H oxidase activity during the respiratory burst. We have recently reported that Hv1 is expressed in cells of the medullary thick ascending limb (mTAL) of the kidney and is critical to augment reactive oxygen species (ROS) production by this segment. While Hv1 is associated with NOX2 mediated ROS production in immune cells, the source of the Hv1 dependent ROS in mTAL remains unknown. In the current study, the rate of ROS formation was quantified in freshly isolated mTAL using dihydroethidium and ethidium fluorescence. Hv1 dependent ROS production was stimulated by increasing bath osmolality and ammonium chloride (NH4Cl) loading. Loss of either p67phox or NOX4 did not abolish the formation of ROS in mTAL. Hv1 was localized to mitochondria within mTAL, and the mitochondrial superoxide scavenger mitoTEMPOL reduced ROS formation. Rotenone significantly increased ROS formation and decreased mitochondrial membrane potential in mTAL from wild-type rats, while treatment with this inhibitor decreased ROS formation and increased mitochondrial membrane potential in mTAL from Hv1−/− mutant rats. These data indicate that NADPH oxidase is not the primary source of Hv1 dependent ROS production in mTAL. Rather Hv1 localizes to the mitochondria in mTAL and modulates the formation of ROS by complex I. These data provide a potential explanation for the effects of Hv1 on ROS production in cells independent of its contribution to maintenance of cell membrane potential and intracellular pH.
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Affiliation(s)
- Bansari Patel
- Department of Physiology, Medical College of Georgia, Augusta, Georgia, USA
| | | | - Sarah C Ray
- Department of Physiology, Medical College of Georgia, Augusta, Georgia, USA
| | - Jingping Sun
- Department of Physiology, Medical College of Georgia, Augusta, Georgia, USA
| | - Allen W Cowley
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Paul M O'Connor
- Department of Physiology, Medical College of Georgia, Augusta, Georgia, USA.
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Ochi R, Chettimada S, Kizub I, Gupte SA. Dehydroepiandrosterone inhibits I Ca,L and its window current in voltage-dependent and -independent mechanisms in arterial smooth muscle cells. Am J Physiol Heart Circ Physiol 2018; 315:H1602-H1613. [PMID: 30379558 DOI: 10.1152/ajpheart.00291.2018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Dehydroepiandrosterone (DHEA) is an adrenal steroid hormone, which has the highest serum concentration among steroid hormones with DHEA sulfate (DHEAS). DHEA possesses an inhibitory action on glucose-6-phosphate dehydrogenase (G6PD), the first pentose-phosphate pathway enzyme that reduces NADP+ to NADPH. DHEA induced relaxation of high K+-induced contraction in rat arterial strips, whereas DHEAS barely induced it. We studied the effects of DHEA on L-type Ca2+ current ( ICa,L) of A7r5 arterial smooth muscle cells and compared the mechanism of inhibition with that produced by the 6-aminonicotinamide (6-AN) competitive inhibitor of G6PD. DHEA moderately inhibited ICa,L that was elicited from a holding potential (HP) of -80 mV [voltage-independent inhibition (VIDI)] and accelerated decay of ICa,L during the depolarization pulse [voltage-dependent inhibition (VDI)]. DHEA-induced VDI decreased peak ICa,L at depolarized HPs. By applying repetitive depolarization pulses from multiple HPs, novel HP-dependent steady-state inactivation curves ( f∞-HP) were constructed. DHEA shifted f∞-HP to the left and inhibited the window current, which was recorded at depolarized HPs and obtained as a product of current-voltage relationship and f∞-HP. The IC50 value of ICa,L inhibition was much higher than serum concentration. DHEA-induced VDI was downregulated by the dialysis of guanosine 5'- O-(2-thiodiphosphate), which shifted f∞-voltage to the right before the application of DHEA. 6-AN gradually and irreversibly inhibited ICa,L by VIDI, suggesting that the inhibition of G6PD is involved in DHEA-induced VIDI. In 6-AN-pretreated cells, DHEA induced additional inhibition by increasing VIDI and generating VDI. The inhibition of G6PD underlies DHEA-induced VIDI, and DHEA additionally induces VDI as described for Ca2+ channel blockers. NEW & NOTEWORTHY Dehydroepiandrosterone, the most abundantly released adrenal steroid hormone with dehydroepiandrosterone sulfate, inhibited L-type Ca2+ current and its window current in aortic smooth muscle cells. The IC50 value of inhibition decreased with the depolarization of holding potential to 15 µM at -20 mV. The inhibition occurred in a voltage-dependent manner as described for Ca2+ channel blockers and in a voltage-independent manner because of the inhibition of glucose-6-phosphate dehydrogenase.
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Affiliation(s)
- Rikuo Ochi
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama , Mobile, Alabama.,Department of Pharmacology, New York Medical College, Valhalla, New York
| | - Sukrutha Chettimada
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama , Mobile, Alabama.,Harvard Medical School , Boston, Massachusetts
| | - Igor Kizub
- Department of Pharmacology, New York Medical College, Valhalla, New York
| | - Sachin A Gupte
- Department of Biochemistry and Molecular Biology, College of Medicine, University of South Alabama , Mobile, Alabama.,Department of Pharmacology, New York Medical College, Valhalla, New York
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Zheng C, Zhong M, Qi Z, Shen F, Zhao Q, Wu L, Huang Y, Tsang SY, Yao X. Histone Deacetylase Inhibitors Relax Mouse Aorta Partly through Their Inhibitory Action on L-Type Ca 2+ Channels. J Pharmacol Exp Ther 2017; 363:211-220. [PMID: 28860353 DOI: 10.1124/jpet.117.242685] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 08/21/2017] [Indexed: 12/21/2022] Open
Abstract
Histone deacetylase (HDAC) inhibitors modulate acetylation/deacetylation of histone and nonhistone proteins. They have been widely used for cancer treatment. However, there have been only a few studies investigating the effect of HDAC inhibitors on vascular tone regulation, most of which employed chronic treatment with HDAC inhibitors. In the present study, we found that two hydroxamate-based pan-HDAC inhibitors, suberoylanilide hydroxamic acid (SAHA) and trichostatin A (TSA), could partially but acutely relax high extracellular K+-contracted mouse aortas. SAHA and TSA also attenuated the high extracellular K+-induced cytosolic Ca2+ rise and inhibited L-type Ca2+ channel current in whole-cell patch-clamp. These data demonstrate that SAHA could inhibit L-type Ca2+ channels to cause vascular relaxation. In addition, SAHA and TSA dose dependently relaxed the arteries precontracted with phenylephrine. The relaxant effect of SAHA and TSA was greater in phenylephrine-precontracted arteries than in high K+-contracted arteries. Although part of the relaxant effect of SAHA and TSA on phenylephrine-precontracted arteries was related to L-type Ca2+ channels, both agents could also induce relaxation via a mechanism independent of L-type Ca2+ channels. Taken together, HDAC inhibitors SAHA and TSA can acutely relax blood vessels via their inhibitory action on L-type Ca2+ channels and via another L-type Ca2+ channel-independent mechanism.
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Affiliation(s)
- Changbo Zheng
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China
| | - Mingkui Zhong
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China.
| | - Zenghua Qi
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China
| | - Fan Shen
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China
| | - Qiannan Zhao
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China
| | - Lulu Wu
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China
| | - Yu Huang
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China
| | - Suk-Ying Tsang
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China
| | - Xiaoqiang Yao
- Department of Physiology, Anhui Medical University, Hefei, China (M.Z., F.S.); School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan, China (C.Z.); and School of Biomedical Sciences and Li Ka Shing Institute of Health Science (C.Z., Q.Z., L.W., Y.H., X.Y.), School of Life Sciences (S.-Y.T, Z.Q.), Shenzhen Research Institute (C.Z., Q.Z., L.W., X.Y.), The Chinese University of Hong Kong, Shenzhen, China.
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Chi J, Meng L, Pan S, Lin H, Zhai X, Liu L, Zhou C, Jiang C, Guo H. Primary Culture of Rat Aortic Vascular Smooth Muscle Cells: A New Method. Med Sci Monit 2017; 23:4014-4020. [PMID: 28822209 PMCID: PMC5572779 DOI: 10.12659/msm.902816] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 02/01/2017] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Developing a simple and efficient method of obtaining primary cultured VSMCs is necessary for basic cardiovascular research. MATERIAL AND METHODS The procedure of our new method mainly includes 6 steps: isolation of the aortic artery, removal of the fat tissue around the artery, separation of the media, cutting the media into small tissue blocks, transferring the tissue blocks to cell culture plates, and incubation until the cells reach confluence. The cells were identified as VSMCs by morphology and immunofluorescence. Then, VSMCs obtained by this new tissue explants method, the traditional tissue explants method, the enzyme digestion method, and A7r5 cell line were divided into 4 groups. The purity of cells was test by multiple fluorescent staining. Western blotting was used to investigate the phenotype of VSMCs obtained by different methods. RESULTS Cells began to grow out at about 8 days and became relatively confluent within 16 days. Compared with VSMCs from the traditional tissue explants method and enzyme digestion method or A7r5 cell line, VSMCs obtained by our method showed higher purity and manifested a more "contractile" phenotype characteristic. CONCLUSIONS We have conquered the disadvantages in the previous primary culture methods and established a simple and reliable way to isolate and culture rat aortic VSMCs with high purity and stability.
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Affiliation(s)
- Jufang Chi
- Department of Cardiology, Shaoxing People’s Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang, P.R. China
| | - Liping Meng
- Department of Cardiology, Shaoxing People’s Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang, P.R. China
| | - Sunlei Pan
- The 1 Clinical Medical College, Wenzhou Medical University, Wenzhou, Zhejiang, P.R. China
| | - Hui Lin
- The 1 Clinical Medical College, Wenzhou Medical University, Wenzhou, Zhejiang, P.R. China
| | - Xiaoya Zhai
- Department of Cardiology, Shaoxing People’s Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang, P.R. China
| | - Longbin Liu
- Department of Cardiology, Shaoxing People’s Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang, P.R. China
| | - Changzuan Zhou
- The 1 Clinical Medical College, Wenzhou Medical University, Wenzhou, Zhejiang, P.R. China
| | - Chengjian Jiang
- Department of Cardiology, Shaoxing People’s Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang, P.R. China
| | - Hangyuan Guo
- Department of Cardiology, Shaoxing People’s Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang, P.R. China
- The 1 Clinical Medical College, Wenzhou Medical University, Wenzhou, Zhejiang, P.R. China
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