1
|
Small extracellular vesicle-mediated miR-320e transmission promotes osteogenesis in OPLL by targeting TAK1. Nat Commun 2022; 13:2467. [PMID: 35513391 PMCID: PMC9072352 DOI: 10.1038/s41467-022-29029-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 02/24/2022] [Indexed: 12/22/2022] Open
Abstract
Ossification of the posterior longitudinal ligament (OPLL) is an emerging spinal disease caused by heterotopic ossification of the posterior longitudinal ligament. The pathological mechanism is poorly understood, which hinders the development of nonsurgical treatments. Here, we set out to explore the function and mechanism of small extracellular vesicles (sEVs) in OPLL. Global miRNA sequencings are performed on sEVs derived from ligament cells of normal and OPLL patients, and we have showed that miR-320e is abundantly expressed in OPLL-derived sEVs compare to other sEVs. Treatment with either sEVs or miR-320e significantly promote the osteoblastic differentiation of normal longitudinal ligament cells and mesenchymal stem cells and inhibit the osteoclastic differentiation of monocytes. Through a mechanistic study, we find that TAK1 is a downstream target of miR-320e, and we further validate these findings in vivo using OPLL model mice. Together, our data demonstrate that OPLL ligament cells secrete ossification-promoting sEVs that contribute to the development of ossification through the miR-320e/TAK1 axis. The pathological mechanisms that lead to Ossification of the posterior longitudinal ligament (OPLL) are unclear. Here, the authors show that OPLL ligament cells produce small extracellular vesicles that induce ossification via miR-320e/TAK1 signaling in mice and human posterior longitudinal ligament cells.
Collapse
|
2
|
Fleishman NR, Richardson T, Attard TM. A multicenter cohort analysis of fractures in histamine-2-receptor antagonist treated pediatric patients. Curr Med Res Opin 2022; 38:565-570. [PMID: 35112645 DOI: 10.1080/03007995.2022.2037847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Histamine 2 receptor antagonists (H2RA) are amongst the most entrenched antacid therapies available including over-the-counter. They have an excellent safety profile including no known teratogenic risk. Fracture risk is generally recognized with chronic proton pump inhibitor (PPI) therapy in adults and children although the related mechanism is poorly understood. The analogous risk in H2RAs, including in children, is unclear. We studied the fracture risk and characteristics among hospitalized pediatric patients exposed to H2RA compared to an untreated cohort. METHODS The Pediatric Health Information System (PHIS) multicenter database was queried for hospital encounters of children aged 6 months - 15.5 years and between 7/2016 and 8/2017. Patients with comorbidities and medications including PPI that predispose for fractures were excluded from the cohort and a propensity-matched control was identified. The subjects and controls were followed for 2 years for hospitalization with fracture diagnoses. RESULTS Our cohort included 3526 patients with exposure to H2RA and matched controls. Fractures were reported in 1% of patients (67) with no statistical difference between the groups. Upper, then lower extremity fractures were the most common in both groups. Axial skeleton fractures were the least frequently encountered fractures among both groups. CONCLUSION H2RA exposure is not associated with an increased risk of fracture in hospitalized children exposed to H2RA when compared with a matched untreated cohort, further studies are needed to determine if long-term exposure to H2RA may be associated with fracture risk in both those with and without comorbidities or on fracture predisposing medication.
Collapse
Affiliation(s)
- Nathan R Fleishman
- Department of Gastroenterology, Levine Children's Hospital, Charlotte, North Carolina, USA
| | | | - Thomas M Attard
- Department of Gastroenterology, Children's Mercy Hospitals and Clinics, Kansas City, Missouri, USA
| |
Collapse
|
3
|
Ye F, Li J, Xu P, Xie Z, Zheng G, Liu W, Ye G, Yu W, Lin J, Su Z, Che Y, Zhang Z, Wang P, Wu Y, Shen H. Osteogenic differentiation of mesenchymal stem cells promotes c-Jun-dependent secretion of interleukin 8 and mediates the migration and differentiation of CD4+ T cells. Stem Cell Res Ther 2022; 13:58. [PMID: 35123547 PMCID: PMC8818240 DOI: 10.1186/s13287-022-02735-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 10/25/2021] [Indexed: 02/07/2023] Open
Abstract
Background The immune system and the skeletal system have complex interactions in the bone marrow and even in the joints, which has promoted the development of the concept of osteoimmunology. Some evidence has indicated that T cells and B cells contribute to the balance between the resorption and formation of bone. However, there has been little discussion on the regulation of CD4+ T lymphocytes by cells involved in bone metabolism. Mesenchymal stem cells (MSCs), which exert core functions related to immunoregulation and osteogenic differentiation, are crucial cells linked to both bone metabolism and the immune system. Previous studies have shown that the immunoregulatory capacity of MSCs changes following differentiation. However, it is still unclear whether the osteogenic differentiation of MSCs affects the migration and differentiation of CD4+ T cells. Methods MSCs were cultured in growth medium or osteogenic medium for 10 days and then cocultured with CD4+ T cells. CD4+ T cell migration and differentiation were detected by flow cytometry. Further, gene expression levels of specific cytokines were analyzed by quantitative real-time PCR and enzyme-linked immunosorbent assays. A Proteome Profiler Human XL Cytokine Array Kit was used to analyze supernatants collected from MSCs. Alizarin red S staining and Alkaline phosphatase assay were used to detect the osteogenic differentiation of MSCs. Results Here, we found that the migration of CD4+ T cells was elevated, and the capacity to induce the differentiation of regulatory T (Treg) cells was weakened during MSC osteogenic differentiation, while the differentiation of T helper 1 (Th1), T helper 2 (Th2) and T helper 17 (Th17) cells was not affected. Further studies revealed that interleukin (IL)-8 was significantly upregulated during MSC osteogenic differentiation. Both a neutralizing antibody and IL-8-specific siRNA significantly inhibited the migration of CD4+ T cells and promoted the differentiation of Treg cells. Finally, we found that the transcription factor c-Jun was involved in regulating the expression of IL-8 and affected the osteogenic differentiation of MSCs, thereby mediating the migration and differentiation of CD4+ T cells. Conclusion This study demonstrated that MSC osteogenic differentiation promoted c-Jun-dependent secretion of IL-8 and mediated the migration and differentiation of CD4+ T cells. These results provide a further understanding of the crosstalk between bone and the immune system and reveal information about the relationship between osteogenesis and inflammation in the field of osteoimmunology. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02735-0.
Collapse
|
4
|
Saheera S, Potnuri AG, Krishnamurthy P. Nano-Vesicle (Mis)Communication in Senescence-Related Pathologies. Cells 2020; 9:E1974. [PMID: 32859053 PMCID: PMC7564330 DOI: 10.3390/cells9091974] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/23/2020] [Accepted: 08/25/2020] [Indexed: 12/11/2022] Open
Abstract
Extracellular vesicles are a heterogeneous group of cell-derived membranous structures comprising of exosomes, apoptotic bodies, and microvesicles. Of the extracellular vesicles, exosomes are the most widely sorted and extensively explored for their contents and function. The size of the nanovesicular structures (exosomes) range from 30 to 140 nm and are present in various biological fluids such as saliva, plasma, urine etc. These cargo-laden extracellular vesicles arise from endosome-derived multivesicular bodies and are known to carry proteins and nucleic acids. Exosomes are involved in multiple physiological and pathological processes, including cellular senescence. Exosomes mediate signaling crosstalk and play a critical role in cell-cell communications. Exosomes have evolved as potential biomarkers for aging-related diseases. Aging, a physiological process, involves a progressive decline of function of organs with a loss of homeostasis and increasing probability of illness and death. The review focuses on the classic view of exosome biogenesis, biology, and age-associated changes. Owing to their ability to transport biological information among cells, the review also discusses the interplay of senescent cell-derived exosomes with the aging process, including the susceptibility of the aging population to COVID-19 infections.
Collapse
Affiliation(s)
- Sherin Saheera
- Department of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA;
| | - Ajay Godwin Potnuri
- Department of Animal Physiology, Indian Council for Medical Research—National Animal Resource Facility for Biomedical Research, Genome Valley, Shamirpet, Hyderabad, Telangana 500078, India;
| | - Prasanna Krishnamurthy
- Department of Biomedical Engineering, School of Medicine and School of Engineering, The University of Alabama at Birmingham, 1675 University Blvd, Volker Hall G094, Birmingham, AL 35294, USA
| |
Collapse
|
5
|
RSP5 Positively Regulates the Osteogenic Differentiation of Mesenchymal Stem Cells by Activating the K63-Linked Ubiquitination of Akt. Stem Cells Int 2020; 2020:7073805. [PMID: 32322280 PMCID: PMC7165343 DOI: 10.1155/2020/7073805] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 03/08/2020] [Accepted: 03/18/2020] [Indexed: 12/27/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are multipotent stem cells that have a strong osteogenic differentiation capacity. However, the molecular mechanism underlying the osteogenic differentiation of MSCs remains largely unknown and thus hinders further development of MSC-based cell therapies for bone repair in the clinic. RSP5, also called NEDD4L (NEDD4-like E3 ubiquitin protein ligase), belongs to the HECT (homologous to E6-AP carboxyl terminus) domain-containing E3 ligase family. Nevertheless, although many studies have been conducted to elucidate the role of RSP5 in various biological processes, its effect on osteogenesis remains elusive. In this study, we demonstrated that the expression of RSP5 was elevated during the osteogenesis of MSCs and positively regulated the osteogenic capacity of MSCs by inducing K63-linked polyubiquitination and activation of the Akt pathway. Taken together, our findings suggest that RSP5 may be a promising target to improve therapeutic efficiency by using MSCs for bone regeneration and repair.
Collapse
|
6
|
Voinova V, Bonartseva G, Bonartsev A. Effect of poly(3-hydroxyalkanoates) as natural polymers on mesenchymal stem cells. World J Stem Cells 2019; 11:764-786. [PMID: 31692924 PMCID: PMC6828591 DOI: 10.4252/wjsc.v11.i10.764] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 05/17/2019] [Accepted: 08/27/2019] [Indexed: 02/06/2023] Open
Abstract
Mesenchymal stem cells (MSCs) are stromal multipotent stem cells that can differentiate into multiple cell types, including fibroblasts, osteoblasts, chondrocytes, adipocytes, and myoblasts, thus allowing them to contribute to the regeneration of various tissues, especially bone tissue. MSCs are now considered one of the most promising cell types in the field of tissue engineering. Traditional petri dish-based culture of MSCs generate heterogeneity, which leads to inconsistent efficacy of MSC applications. Biodegradable and biocompatible polymers, poly(3-hydroxyalkanoates) (PHAs), are actively used for the manufacture of scaffolds that serve as carriers for MSC growth. The growth and differentiation of MSCs grown on PHA scaffolds depend on the physicochemical properties of the polymers, the 3D and surface microstructure of the scaffolds, and the biological activity of PHAs, which was discovered in a series of investigations. The mechanisms of the biological activity of PHAs in relation to MSCs remain insufficiently studied. We suggest that this effect on MSCs could be associated with the natural properties of bacteria-derived PHAs, especially the most widespread representative poly(3-hydroxybutyrate) (PHB). This biopolymer is present in the bacteria of mammalian microbiota, whereas endogenous poly(3-hydroxybutyrate) is found in mammalian tissues. The possible association of PHA effects on MSCs with various biological functions of poly(3-hydroxybutyrate) in bacteria and eukaryotes, including in humans, is discussed in this paper.
Collapse
Affiliation(s)
- Vera Voinova
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow 119234, Russia
| | - Garina Bonartseva
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| | - Anton Bonartsev
- Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow 119234, Russia
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow 119071, Russia
| |
Collapse
|
7
|
Nam DC, Lee HJ, Lee CJ, Hwang SC. Molecular Pathophysiology of Ossification of the Posterior Longitudinal Ligament (OPLL). Biomol Ther (Seoul) 2019; 27:342-348. [PMID: 31042677 PMCID: PMC6609106 DOI: 10.4062/biomolther.2019.043] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 03/31/2019] [Accepted: 04/09/2019] [Indexed: 12/20/2022] Open
Abstract
Ossification of the posterior longitudinal ligament (OPLL) can be defined as an ectopic ossification in the tissues of spinal ligament showing a hyperostotic condition. OPLL is developed mostly in the cervical spine and clinical presentations of OPLL are majorly myelopathy and/or radiculopathy, with serious neurological pathology resulting in paralysis of extremities and disturbances of motility lowering the quality of life. OPLL is known to be an idiopathic and multifactorial disease, which genetic factors and non-genetic factors including diet, obesity, physical strain on the posterior longitudinal ligament, age, and diabetes mellitus, are involved into the pathogenesis. Up to now, surgical management by decompressing the spinal cord is regarded as standard treatment for OPLL, although there might be the risk of development of reprogression of ossification. The molecular pathogenesis and efficient therapeutic strategy, especially pharmacotherapy and/or preventive intervention, of OPLL has not been clearly elucidated and suggested. Therefore, in this review, we tried to give an overview to the present research results on OPLL, in order to shed light on the potential pharmacotherapy based on molecular pathophysiologic aspect of OPLL, especially on the genetic/genomic factors involved into the etiology of OPLL.
Collapse
Affiliation(s)
- Dae Cheol Nam
- Department of Orthopaedic Surgery and Institute of Health Sciences, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju 52727, Republic of Korea
| | - Hyun Jae Lee
- Smith Liberal Arts College and Department of Addiction Science, Graduate School, Sahmyook University, Seoul 01795, Republic of Korea
| | - Choong Jae Lee
- Department of Pharmacology, School of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea
| | - Sun-Chul Hwang
- Department of Orthopaedic Surgery and Institute of Health Sciences, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju 52727, Republic of Korea
| |
Collapse
|
8
|
Sun Y, Peng X, Li Y, Ma H, Li D, Shi X. The effects of histamine H1 type receptor (H1R) in regulating osteoblastic cell differentiation and mineralization. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:1281-1287. [PMID: 30942635 DOI: 10.1080/21691401.2019.1596924] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yanpeng Sun
- Department of Spinal Surgery, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Xiaodong Peng
- Department of Spinal Surgery, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Yanzhou Li
- Department of Intervention, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Husheng Ma
- Department of Spinal Surgery, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Dongfang Li
- Department of Spinal Surgery, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Xiangqin Shi
- Department of Spinal Surgery, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| |
Collapse
|
9
|
Tang S, Xie Z, Wang P, Li J, Wang S, Liu W, Li M, Wu X, Su H, Cen S, Ye G, Zheng G, Wu Y, Shen H. LncRNA-OG Promotes the Osteogenic Differentiation of Bone Marrow-Derived Mesenchymal Stem Cells Under the Regulation of hnRNPK. Stem Cells 2019; 37:270-283. [PMID: 30372559 PMCID: PMC7379496 DOI: 10.1002/stem.2937] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 09/19/2018] [Accepted: 10/09/2018] [Indexed: 12/14/2022]
Abstract
Bone marrow-derived mesenchymal stem cells (BM-MSCs) are the main source of osteoblasts in vivo and are widely used in stem cell therapy. Previously, we analyzed long noncoding RNA (lncRNA) expression profiles during BM-MSC osteogenesis, and further investigation is needed to elucidate how lncRNAs regulate BM-MSC osteogenesis. Herein, we used customized microarrays to determine lncRNA expression profiles in BM-MSCs on days 0 and 10 of osteogenic differentiation. In addition, we identified a novel osteogenesis-associated lncRNA (lncRNA-OG) that is upregulated during this process. Functional assays showed that lncRNA-OG significantly promotes BM-MSC osteogenesis. Mechanistically, lncRNA-OG interacts with heterogeneous nuclear ribonucleoprotein K (hnRNPK) protein to regulate bone morphogenetic protein signaling pathway activation. Surprisingly, hnRNPK positively regulates lncRNA-OG transcriptional activity by promoting H3K27 acetylation of the lncRNA-OG promoter. Therefore, our study revealed a novel lncRNA with a positive function on BM-MSC osteogenic differentiation and proposed a new interaction between hnRNPK and lncRNA. Stem Cells 2018 Stem Cells 2019;37:270-283.
Collapse
Affiliation(s)
- Su'an Tang
- Department of OrthopedicsThe Eighth Affiliated Hospital, Sun Yat‐sen UniversityShenzhenPeople's Republic of China
- Department of OrthopedicsZhujiang Hospital, Southern Medical UniversityGuangzhouPeople's Republic of China
| | - Zhongyu Xie
- Department of OrthopedicsThe Eighth Affiliated Hospital, Sun Yat‐sen UniversityShenzhenPeople's Republic of China
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Peng Wang
- Department of OrthopedicsThe Eighth Affiliated Hospital, Sun Yat‐sen UniversityShenzhenPeople's Republic of China
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Jinteng Li
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Shan Wang
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Wenjie Liu
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Ming Li
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Xiaohua Wu
- Center for BiotherapySun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Hongjun Su
- Center for BiotherapySun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Shuizhong Cen
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Guiwen Ye
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Guan Zheng
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Yanfeng Wu
- Center for BiotherapySun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| | - Huiyong Shen
- Department of OrthopedicsThe Eighth Affiliated Hospital, Sun Yat‐sen UniversityShenzhenPeople's Republic of China
- Department of OrthopedicsSun Yat‐sen Memorial Hospital, Sun Yat‐sen UniversityGuangzhouPeople's Republic of China
| |
Collapse
|
10
|
Saheera S, Potnuri AG, Nair R. Histamine-2 receptor antagonist famotidine modulates cardiac stem cell characteristics in hypertensive heart disease. PeerJ 2017; 5:e3882. [PMID: 29038754 PMCID: PMC5637875 DOI: 10.7717/peerj.3882] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 09/12/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Cardiac stem cells (CSCs) play a vital role in cardiac homeostasis. A decrease in the efficiency of cardiac stem cells is speculated in various cardiac abnormalities. The maintenance of a healthy stem cell population is essential for the prevention of adverse cardiac remodeling leading to cardiac failure. Famotidine, a histamine-2 receptor antagonist, is currently used to treat ulcers of the stomach and intestines. In repurposing the use of the drug, reduction of cardiac hypertrophy and improvement in cardiac function of spontaneously hypertensive rats (SHR) was reported by our group. Given that stem cells are affected in cardiac pathologies, the effect of histamine-2 receptor antagonism on CSC characteristics was investigated. METHODS To examine whether famotidine has a positive effect on CSCs, spontaneously hypertensive rats (SHR) treated with the drug were sacrificed; and CSCs isolated from atrial appendages was evaluated. Six-month-old male SHRs were treated with famotidine (30 mg/kg/day) for two months. The effect of famotidine treatment on migration, proliferation and survival of CSCs was compared with untreated SHRs and normotensive Wistar rats. RESULTS Functional efficiency of CSCs from SHR was compromised relative to that in Wistar rat. Famotidine increased the migration and proliferation potential, along with retention of stemness of CSCs in treated SHRs. Cellular senescence and oxidative stress were also reduced. The expression of H2R was unaffected by the treatment. DISCUSSION As anticipated, CSCs from SHRs were functionally impaired. Stem cell attributes of famotidine-treated SHRs was comparable to that of Wistar rats. Therefore, in addition to being cardioprotective, the histamine 2 receptor antagonist modulated cardiac stem cells characteristics. Restoration of stem cell efficiency by famotidine is possibly mediated by reduction of oxidative stress as the expression of H2R was unaffected by the treatment. Maintenance of healthy stem cell population is suggested as a possible mechanism underlying the cardioprotective effect of famotidine.
Collapse
Affiliation(s)
- Sherin Saheera
- Division of Cellular and Molecular Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Ajay G Potnuri
- Division of Cellular and Molecular Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| | - Renuka Nair
- Division of Cellular and Molecular Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India
| |
Collapse
|