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Song W, Liu H, Su Y, Zhao Q, Wang X, Cheng P, Wang H. Current developments and opportunities of pluripotent stem cells-based therapies for salivary gland hypofunction. Front Cell Dev Biol 2024; 12:1346996. [PMID: 38313227 PMCID: PMC10834761 DOI: 10.3389/fcell.2024.1346996] [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: 11/30/2023] [Accepted: 01/10/2024] [Indexed: 02/06/2024] Open
Abstract
Salivary gland hypofunction (SGH) caused by systemic disease, drugs, aging, and radiotherapy for head and neck cancer can cause dry mouth, which increases the risk of disorders such as periodontitis, taste disorders, pain and burning sensations in the mouth, dental caries, and dramatically reduces the quality of life of patients. To date, the treatment of SGH is still aimed at relieving patients' clinical symptoms and improving their quality of life, and is not able to repair and regenerate the damaged salivary glands. Pluripotent stem cells (PSCs), including embryonic stem cells (ESCs), induced pluripotent stem cells (iPSCs), and extended pluripotent stem cells (EPSCs), are an emerging source of cellular therapies that are capable of unlimited proliferation and differentiation into cells of all three germ layers. In recent years, the immunomodulatory and tissue regenerative effects of PSCs, their derived cells, and paracrine products of these cells have received increasing attention and have demonstrated promising therapeutic effects in some preclinical studies targeting SGH. This review outlined the etiologies and available treatments for SGH. The existing efficacy and potential role of PSCs, their derived cells and paracrine products of these cells for SGH are summarized, with a focus on PSC-derived salivary gland stem/progenitor cells (SGS/PCs) and PSC-derived mesenchymal stem cells (MSCs). In this Review, we provide a conceptual outline of our current understanding of PSCs-based therapy and its importance in SGH treatment, which may inform and serve the design of future studies.
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Affiliation(s)
- Wenpeng Song
- Department of Stomatology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Huan Liu
- Beijing Laboratory of Oral Health, School of Basic Medicine, School of Stomatology, Capital Medical University, Beijing, China
| | - Yingying Su
- Department of Stomatology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Qian Zhao
- Research and Development Department, Allife Medicine Inc., Beijing, China
| | - Xiaoyan Wang
- Department of Stomatology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Beijing Laboratory of Oral Health, School of Basic Medicine, School of Stomatology, Capital Medical University, Beijing, China
- Biochemistry and Molecular Biology, School of Basic Medical Sciences, Beijing, China
| | - Pengfei Cheng
- Department of Stomatology, Eye Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Hao Wang
- Department of Stomatology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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Vinod A, Raj SN, Anand A, Shirly AD. Dental Considerations for the Treatment of Patients with Morquio Syndrome. Int J Clin Pediatr Dent 2022; 15:707-710. [PMID: 36866126 PMCID: PMC9973083 DOI: 10.5005/jp-journals-10005-2451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Aim Morquio syndrome, also called Mucopolysaccharidosis IV (MPS IV), is a rare autosomal recessive metabolic lysosomal disorder that results in the deposition of glycosaminoglycans (GAGs) in various tissues and organs, resulting in an array of signs and symptoms. The aim of the study was to systematically record the clinical features with a special emphasis on oral manifestations of patients diagnosed with MPS IV and asses the dental treatment implications of the disease manifestations. Materials and methods A cross-sectional study was conducted on patients diagnosed with MPS IV (n = 26). A complete clinical and oral examination was done and the findings were systemically recorded. Results The study showed that the patients diagnosed with MPS IV have multiple treatment challenges owing to the range of disease manifestations. Furthermore, they have higher oral health care needs because of the anatomical and pathological changes. Conclusion and clinical significance Dental professionals must be aware of the implications of the disease manifestation and their accompanying challenges while treating patients with MPS IV. The oral health needs are higher for these patients and regular dental evaluation and treatment must be incorporated into their health care regimen. How to cite this article Vinod A, Raj SN, Anand A, et al. Dental Considerations for the Treatment of Patients with Morquio Syndrome. Int J Clin Pediatr Dent 2022;15(6):707-710.
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Affiliation(s)
- Anju Vinod
- Department of Pediatric and Preventive Dentistry, P. S. M. College of Dental Science & Research, Thrissur, Kerala, India
| | - Sunil N Raj
- Department of Pediatric and Preventive Dentistry, Bangalore Institute of Dental Sciences, Bengaluru, Karnataka, India
| | - Anitha Anand
- Department of Paedodontics and Preventive Dentistry, Bangalore Institute of Dental Sciences (BIDS), Bengaluru, Karnataka, India
| | - Arjun Dilip Shirly
- Department of Pediatric and Preventive Dentistry, Azeezia College of Dental Sciences and Research, Kollam, Kerala, India
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Mizuhashi F, Morita T, Toya S, Sato R, Watarai Y, Koide K. Protein Ingredient in Saliva on Oral Dryness Patients Caused by Calcium Blocker. Geriatrics (Basel) 2020; 5:geriatrics5040070. [PMID: 33036340 PMCID: PMC7709676 DOI: 10.3390/geriatrics5040070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/24/2020] [Accepted: 09/25/2020] [Indexed: 12/02/2022] Open
Abstract
Oral dryness as a side effect of certain drugs is increasing. The aim of this study was to examine the change of the protein ingredient in saliva of oral dryness patients caused by calcium blocker. Six patients taking calcium blocker and six healthy elderly were enrolled. Unstimulated salivary flow rate, protein concentration, and flow rate of protein were measured and compared between the patients taking calcium blocker and healthy elderly. iTRAQ (Isobaric Tag for Relative and Absolute Quantitation) proteomic analysis was performed to extract the salivary protein changed in patient taking calcium blocker, and the intensities of Western blotting products were quantified (unpaired t-test). Unstimulated salivary flow rate was significantly lower on patients taking calcium blocker (p < 0.01). Protein concentration tended to be higher and the flow rate of protein tended to be lower on patients. As the result of iTRAQ proteomic analysis, calmodulin-like protein 3, glutathione S-transferase P, and keratin type I cytoskeletal 13 increased characteristically in patient taking calcium blocker, and the expression in calmodulin-like protein 3 was significantly larger (p < 0.01). The results of this study indicated that calmodulin-like protein 3 increased in patients taking calcium blocker and could be a salivary biomarker for oral dryness caused by calcium blocker.
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Affiliation(s)
- Fumi Mizuhashi
- Department of Removable Prosthodontics, the Nippon Dental University School of Life Dentistry at Niigata, Niigata 951-8580, Japan; (Y.W.); (K.K.)
- Correspondence: ; Tel.: +81-25-267-1500
| | - Takao Morita
- Department of Biochemistry, the Nippon Dental University School of Life Dentistry at Niigata, Niigata 951-8580, Japan; (T.M.); (R.S.)
| | - Shuji Toya
- Dry Mouth Clinic, Oral and Maxillofacial Surgery, The Nippon Dental University Niigata Hospital, Niigata 951-8580, Japan;
| | - Ritsuko Sato
- Department of Biochemistry, the Nippon Dental University School of Life Dentistry at Niigata, Niigata 951-8580, Japan; (T.M.); (R.S.)
| | - Yuko Watarai
- Department of Removable Prosthodontics, the Nippon Dental University School of Life Dentistry at Niigata, Niigata 951-8580, Japan; (Y.W.); (K.K.)
| | - Kaoru Koide
- Department of Removable Prosthodontics, the Nippon Dental University School of Life Dentistry at Niigata, Niigata 951-8580, Japan; (Y.W.); (K.K.)
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Einhorn OM, Georgiou K, Tompa A. Salivary dysfunction caused by medication usage. Physiol Int 2020; 107:195-208. [PMID: 32750027 DOI: 10.1556/2060.2020.00019] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 05/11/2020] [Indexed: 11/19/2022]
Abstract
A considerable number of patients arriving in dental offices are being treated with ongoing medication for a variety of chronic diseases. As a result, dentists must be familiar with the potential side effects these therapeutic agents may have on the tissues of the oral cavity, and in particular on the salivary gland. Salivary gland function may be altered by a wide range of medications, leading to effects such as xerostomia, hyposalivation, hypersalivation or even swelling of the glands. These disorders can cause a variety of other health complications. This review will focus on the most common groups of drugs responsible for salivary gland dysfunction, including psychoactive drugs, antidepressants, antipsychotics, antihypertensives, and antihistamines.
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Affiliation(s)
- O M Einhorn
- 1Private Dental Office: Dr. Einhorn, 89 Medinat Hayehudim Street, Herzliya, Israel
| | - K Georgiou
- 2Private Dental Office: Dr. Georgiou, 2-4 Makarios Avenue, Nicosia, 1065, Cyprus
| | - A Tompa
- 3Institute of Public Health, Semmelweis University, Budapest, 1089, Hungary
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Bai Y, Li B, Wang S, Jiang H, Li J, Wang W, Wang K, Qin L, Jia J. Effects of estrogen on STIM1/Orai1 in the sublingual gland of ovariectomized rats. Histol Histopathol 2020; 35:701-707. [PMID: 31916583 DOI: 10.14670/hh-18-198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Studies have shown that estrogen can protect the function of the sublingual gland, but the specific mechanism is still unclear. Besides, the STIM1/Orai1 pathway is important to secretion in the salivary gland. Here, we explore the possible effects of estrogen on sublingual gland function by observing changes of STIM1 and Orai1 levels in the sublingual glands of ovariectomized rats. METHODS 42 adult female Sprague-Dawley rats were randomly divided into three groups: SHAM, OVX, and OVX+E (n = 14 per group). Two weeks after ovariectomy, rats were treated with estrogen (β-estradiol). The expression of STIM1 and Orai1 in the sublingual gland were observed by double label-immunohistochemistry and immunofluorescence. Calcium imaging was conducted to observe changes in cellular Ca²⁺ levels. RESULTS IHC and IF showed that the levels of both STIM1 and Orai1 decreased following ovariectomy, but increased to SHAM levels after estrogen treatment. By IF, STIM1 and Orai1 exhibited perfect co-localization. Calcium imaging results showed that the Ca²⁺ in the cells decreased after ovariectomy. Estrogen intervention returned levels of these proteins and Ca²⁺ to the same as those in the control group. CONCLUSION This study demonstrates that low estrogen status significantly reduced the expression of STIM1 and Orai1 in the sublingual gland of rats, along with cellular Ca²⁺ levels. These data provide insight into the likely mechanisms underlying sublingual gland secretion dysfunction during menopause.
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Affiliation(s)
- Yun Bai
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China.,Department of Stomatology, Tianjin Hospital, Tianjin, China
| | - Bing Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China
| | - Sinan Wang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China
| | - Hai Jiang
- Department of Anatomy and Histoembryology, School of Basic Medical Science, Peking University, Beijing, China
| | - Junlei Li
- Department of Cardiology, Peking University People's Hospital, Beijing, China
| | - Wenjuan Wang
- Department of Anatomy and Histoembryology, School of Basic Medical Science, Peking University, Beijing, China
| | - Ke Wang
- Department of Anatomy and Histoembryology, School of Basic Medical Science, Peking University, Beijing, China
| | - Lihua Qin
- Department of Anatomy and Histoembryology, School of Basic Medical Science, Peking University, Beijing, China.
| | - Jing Jia
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China.,Department of Stomatology, The Third Medical Center, Chinese PLA (People's Liberation Army) General Hospital, Beijing, China.
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Bhattarai KR, Junjappa R, Handigund M, Kim HR, Chae HJ. The imprint of salivary secretion in autoimmune disorders and related pathological conditions. Autoimmun Rev 2018; 17:376-390. [DOI: 10.1016/j.autrev.2017.11.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 11/16/2017] [Indexed: 12/11/2022]
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Balakumar P, Kavitha M, Nanditha S. Cardiovascular drugs-induced oral toxicities: A murky area to be revisited and illuminated. Pharmacol Res 2015; 102:81-9. [DOI: 10.1016/j.phrs.2015.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 08/22/2015] [Accepted: 09/08/2015] [Indexed: 12/20/2022]
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Salivary hypofunction: An update on aetiology, diagnosis and therapeutics. Arch Oral Biol 2015; 60:242-55. [DOI: 10.1016/j.archoralbio.2014.10.004] [Citation(s) in RCA: 127] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 09/15/2014] [Accepted: 10/28/2014] [Indexed: 12/25/2022]
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Ishii M, Hagiwara T, Mori Y, Shimizu S. Involvement of TRPM2 and L-type Ca²⁺ channels in Ca²⁺ entry and cell death induced by hydrogen peroxide in rat β-cell line RIN-5F. J Toxicol Sci 2014; 39:199-209. [PMID: 24646700 DOI: 10.2131/jts.39.199] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Ca²⁺ overload is one of the mechanisms for H₂O₂-induced cell death in rat pancreatic β-cell line RIN-5F cells. RIN-5F cells express TRPM2, which is a Ca²⁺-permeable channel activated by H₂O₂, and voltage-dependent L-type Ca²⁺ channels, both of which induce Ca²⁺ entry by H₂O₂. This study examined the contribution of these channels to H₂O₂-induced Ca²⁺ entry and cell death in RIN-5F cells. Cytosolic Ca²⁺ concentration was measured using fura-2 as a Ca²⁺ indicator. Cell death was estimated by trypan blue exclusion. Pre-treatment with poly(ADP-ribose) polymerase (PARP) inhibitors, which inhibit TRPM2 activation, strongly reduced Ca²⁺ entry by H₂O₂. The PARP inhibitors used had no effect on the Ca²⁺ elevation by voltage-dependent L-type Ca²⁺ channels. On the other hand, pre-treatment with L-type Ca²⁺ channel blockers, which did not affect TRPM2 activation, partly reduced H₂O₂-induced Ca²⁺ entry. Treatment with PARP inhibitors but not L-type Ca²⁺ channel blockers, around the early phase in H₂O₂-induced Ca²⁺ elevation, also reduced the late phase. Moreover, H₂O₂-induced RIN-5F cell death was strongly attenuated by PARP inhibitors, in compared to L-type Ca²⁺ channel blockers. Our results suggest that TRPM2 channels rather than L-type Ca²⁺ channels primarily contribute to H₂O₂-induced Ca²⁺ entry and cell death.
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Affiliation(s)
- Masakazu Ishii
- Department of Pharmacology, Toxicology and Therapeutics, Division of Physiology and Pathology, Showa University School of Pharmacy
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Liang WZ, Chou CT, Lu T, Chi CC, Tseng LL, Pan CC, Lin KL, Kuo CC, Jan CR. The mechanism of carvacrol-evoked [Ca2+]i rises and non-Ca2+-triggered cell death in OC2 human oral cancer cells. Toxicology 2012; 303:152-61. [PMID: 23146755 DOI: 10.1016/j.tox.2012.10.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 10/31/2012] [Indexed: 01/28/2023]
Abstract
Carvacrol is one of the main substances of essential oil which triggers intracellular Ca(2+) mobilization and causes cytotoxicity in diverse cell models. However, the mechanism of carvacrol-induced Ca(2+) movement and cytotoxicity is not fully understood. This study examined the effect of carvacrol on cytosolic free Ca(2+) concentrations ([Ca(2+)](i)), cell viability and apoptosis in OC2 human oral cancer cells. Carvacrol induced a [Ca(2+)](i) rise and the signal was reduced by removal of extracellular Ca(2+). Carvacrol-induced Ca(2+) entry was not altered by store-operated Ca(2+) channel inhibitors and protein kinase C (PKC) activator, but was inhibited by a PKC inhibitor. In Ca(2+) -free medium, treatment with the endoplasmic reticulum Ca(2+) pump inhibitor thapsigargin (TG) or 2,5-di-tert-butylhydroquinone (BHQ) inhibited carvacrol-induced [Ca(2+)](i) rise. Conversely, incubation with carvacrol inhibited TG or BHQ-induced [Ca(2+)](i) rise. Inhibition of phospholipase C (PLC) with U73122 abolished carvacrol-induced [Ca(2+)](i) rise. Carvacrol decreased cell viability, which was not reversed when cytosolic Ca(2+) was chelated with BAPTA-AM (1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid-acetoxymethyl ester). Carvacrol-induced apoptosis and activation of reactive oxygen species (ROS) and caspase-3. Together, carvacrol induced a [Ca(2+)](i) rise by inducing PLC-dependent Ca(2+) release from the endoplasmic reticulum and Ca(2+) entry via PKC-sensitive, non store-operated Ca(2+) channels. Carvacrol-induced ROS- and caspase-3-associated apoptosis.
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Affiliation(s)
- Wei-Zhe Liang
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan, ROC
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Chi CC, Chou CT, Kuo CC, Hsieh YD, Liang WZ, Tseng LL, Su HH, Chu ST, Ho CM, Jan CR. Effect of m-3m3FBS on Ca2+ handling and viability in OC2 human oral cancer cells. ACTA ACUST UNITED AC 2012; 99:74-86. [PMID: 22425810 DOI: 10.1556/aphysiol.99.2012.1.8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The effect of 2,4,6-trimethyl-N-(meta-3-trifluoromethyl-phenyl)-benzenesulfonamide (m-3M3FBS), a presumed phospholipase C activator, on cytosolic free Ca2+ concentrations ([Ca2+]i) in OC2 human oral cancer cells is unclear. This study explored whether m-3M3FBS changed basal [Ca2+]i levels in suspended OC2 cells by using fura-2 as a Ca2+-sensitive fluorescent dye. M-3M3FBS at concentrations between 10-60 μM increased [Ca2+]i in a concentration-dependent manner. The Ca2+ signal was reduced partly by removing extracellular Ca2+. M-3M3FBS-induced Ca2+ influx was inhibited by the store-operated Ca2+ channel blockers nifedipine, econazole and SK&F96365, and by the phospholipase A2 inhibitor aristolochic acid. In Ca2+-free medium, 30 μM m-3M3FBS pretreatment inhibited the [Ca2+]i rise induced by the endoplasmic reticulum Ca2+ pump inhibitors thapsigargin and 2,5-di-tert-butylhydroquinone (BHQ). Conversely, pretreatment with thapsigargin, BHQ or cyclopiazonic acid partly reduced m-3M3FBS-induced [Ca2+]i rise. Inhibition of inositol 1,4,5-trisphosphate formation with U73122 did not alter m-3M3FBS-induced [Ca2+]i rise. At concentrations between 5 and 100 μM m-3M3FBS killed cells in a concentration-dependent manner. The cytotoxic effect of m-3M3FBS was not reversed by prechelating cytosolic Ca2+ with 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid (BAPTA). Propidium iodide staining data suggest that m-3M3FBS (20 or 50 μM) induced apoptosis in a Ca2+-independent manner. Collectively, in OC2 cells, m-3M3FBS induced [Ca2+]i rise by causing inositol 1,4,5-trisphosphate-independent Ca2+ release from the endoplasmic reticulum and Ca2+ influx via phospholipase A2-sensitive store-operated Ca2+ channels. M-3M3FBS also induced Ca2+-independent cell death and apoptosis.
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Affiliation(s)
- Chao-Chuan Chi
- Kaohsiung Veterans General Hospital Department of Otolaryngology Kaohsiung Taiwan
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Neuroprotection by lomerizine, a prophylactic drug for migraine, against hydrogen peroxide-induced hippocampal neurotoxicity. Mol Cell Biochem 2011; 358:1-11. [PMID: 21656126 DOI: 10.1007/s11010-011-0913-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Accepted: 05/28/2011] [Indexed: 10/18/2022]
Abstract
Migraine is one of the risk factor for ischemic stroke. The purpose of this study was to examine the effect of lomerizine, a prophylactic drug for migraine, on H(2)O(2)-induced cell death of hippocampal neurons. Cytosolic Ca(2+) concentration was measured using fura-2 as a Ca(2+) indicator. Cell death was estimated by trypan blue exclusion. In rat-cultured hippocampal neurons, the addition of H(2)O(2) induced biphasic Ca(2+) elevations and cell death. The H(2)O(2)-induced biphasic Ca(2+) elevations and cell death only occurred when extracellular Ca(2+) was present. The biphasic Ca(2+) elevation was mediated by Ca(2+) influx through the plasma membrane, but not Ca(2+) release from the intracellular Ca(2+) store. Both the early and late phases of H(2)O(2)-induced Ca(2+) influx were reduced by either a T- or L-type voltage-dependent Ca(2+) channel (VDCC) blocker, lomerizine. In fact, L-type VDCC (α(1C) subunit) and T-type VDCC (α(1G) subunit) mRNA were expressed in rat hippocampal neurons. Although an L-type VDCC blocker, nifedipine, partly suppressed the late phase of Ca(2+) influx in response to H(2)O(2), a T-type VDCC blocker, mibefradil, reduced both phases of Ca(2+) influx. Moreover, lomerizine and mibefradil strongly reduced H(2)O(2)-induced cell death, and nifedipine weakly reduced it. These findings suggest that the inhibition of H(2)O(2)-induced Ca(2+) influx through T-type VDCC seems to be important in the protective effect of lomerizine against oxidative stress. It is possible that lomerizine may be a useful drug for prophylactic treatment of migraine, because migraine is a risk factor for ischemic stroke.
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Fang YC, Kuo DH, Shieh P, Chen FA, Kuo CC, Jan CR. Effect of m-3M3FBS on Ca(2+) movement in Madin-Darby canine renal tubular cells. Hum Exp Toxicol 2009; 28:655-63. [PMID: 19770166 DOI: 10.1177/0960327109106972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The effect of 2,4,6-trimethyl-N-(meta-3-trifluoromethyl-phenyl)-benzenesulfonamide (m-3M3FBS), a presumed phospholipase C (PLC) activator, on cytosolic free Ca(2+) concentrations ([Ca( 2+)](i)) in Madin-Darby canine kidney (MDCK) cells is unclear. This study explored whether m-3M3FBS changed basal [Ca(2+)](i) levels in suspended MDCK cells using fura-2 as a Ca(2+)-sensitive fluorescent dye. M-3M3FBS at concentrations between 0.1 and 20 microM increased [Ca(2+)](i) in a concentration-dependent manner. The Ca(2+) signal was decreased by removing extracellular Ca(2+). M-3M3FBS-induced Ca(2+) influx was inhibited by the store-operated Ca(2+) channel blockers nifedipine, econazole, and SK&F96365, and by the phospholipase A2 inhibitor aristolochic acid. In Ca(2+)-free medium, 20-microM m-3M3FBS pretreatment abolished the [Ca(2+)](i) rise induced by the endoplasmic reticulum Ca(2+) pump inhibitors thapsigargin (TG) and cyclopiazonic acid (CPA). Conversely, pretreatment with TG or CPA partly reduced m-3M3FBS-induced [Ca(2+)](i) rise. The inhibition of PLC with U73122 did not alter m-3M3FBS-induced [Ca(2+)](i) rise. Collectively, in MDCK cells, m-3M3FBS induced [Ca(2+)](i) rises by causing PLC-independent Ca(2+) release from the endoplasmic reticulum and Ca(2+) influx via store-operated Ca(2+) channels and other unidentified Ca(2+) channels.
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Affiliation(s)
- Yi-Chien Fang
- Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan
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