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Lee D, Kim YH, Kim JH. The Role of Lysophosphatidic Acid in Adult Stem Cells. Int J Stem Cells 2020; 13:182-191. [PMID: 32587135 PMCID: PMC7378901 DOI: 10.15283/ijsc20035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/24/2020] [Accepted: 05/21/2020] [Indexed: 01/06/2023] Open
Abstract
Stem cells are undifferentiated multipotent precursor cells that are capable both of perpetuating themselves as stem cells (self-renewal) and of undergoing differentiation into one or more specialized types of cells. And these stem cells have been reported to reside within distinct anatomic locations termed “niches”. The long-term goals of stem cell biology range from an understanding of cell-lineage determination and tissue organization to cellular therapeutics for degenerative diseases. Stem cells maintain tissue function throughout an organism’s lifespan by replacing differentiated cells. To perform this function, stem cells provide a unique combination of multilineage developmental potential and the capacity to undergo self-renewing divisions. The loss of self-renewal capacity in stem cells underlies certain degenerative diseases and the aging process. This self-renewal regulation must balance the regenerative needs of tissues that persist throughout life. Recent evidence suggests lysophosphatidic acid (LPA) signaling pathway plays an important role in the regulation of a variety of stem cells. In this review, we summarize the evidence linking between LPA and stem cell regulation. The LPA-induced signaling pathway regulates the proliferation and survival of stem cells and progenitors, and thus are likely to play a role in the maintenance of stem cell population in the body. This lipid mediator regulatory system can be a novel potential therapeutics for stem cell maintenance.
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Affiliation(s)
- Dongjun Lee
- Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan, Korea
| | - Yun Hak Kim
- Department of Anatomy, Pusan National University School of Medicine, Yangsan, Korea.,Department of Biomedical Informatics, Pusan National University School of Medicine, Yangsan, Korea
| | - Jae Ho Kim
- Department of Physiology, Pusan National University School of Medicine, Yangsan, Korea
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Modulation of LPA1 receptor-mediated neuronal apoptosis by Saikosaponin-d: A target involved in depression. Neuropharmacology 2019; 155:150-161. [DOI: 10.1016/j.neuropharm.2019.05.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/13/2019] [Accepted: 05/20/2019] [Indexed: 12/13/2022]
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Lidgerwood GE, Pitson SM, Bonder C, Pébay A. Roles of lysophosphatidic acid and sphingosine-1-phosphate in stem cell biology. Prog Lipid Res 2018; 72:42-54. [PMID: 30196008 DOI: 10.1016/j.plipres.2018.09.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 08/15/2018] [Accepted: 09/05/2018] [Indexed: 02/06/2023]
Abstract
Stem cells are unique in their ability to self-renew and differentiate into various cell types. Because of these features, stem cells are key to the formation of organisms and play fundamental roles in tissue regeneration and repair. Mechanisms controlling their fate are thus fundamental to the development and homeostasis of tissues and organs. Lysophosphatidic acid (LPA) and sphingosine-1-phosphate (S1P) are bioactive phospholipids that play a wide range of roles in multiple cell types, during developmental and pathophysiological events. Considerable evidence now demonstrates the potent roles of LPA and S1P in the biology of pluripotent and adult stem cells, from maintenance to repair. Here we review their roles for each main category of stem cells and explore how those effects impact development and physiopathology.
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Affiliation(s)
- Grace E Lidgerwood
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia; Ophthalmology, Department of Surgery, the University of Melbourne, Melbourne, Australia
| | - Stuart M Pitson
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, Australia
| | - Claudine Bonder
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, Australia
| | - Alice Pébay
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia; Ophthalmology, Department of Surgery, the University of Melbourne, Melbourne, Australia.
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YANG ZHIYUN, WANG LI, HOU YIXIN, WANG XIANBO. Effects of matrine on oval cell-mediated liver regeneration and expression of RBP-Jκ and HES1. Mol Med Rep 2013; 7:1533-8. [DOI: 10.3892/mmr.2013.1398] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Accepted: 01/03/2013] [Indexed: 11/05/2022] Open
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Lysoglycerophospholipids in chronic inflammatory disorders: The PLA2/LPC and ATX/LPA axes. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1831:42-60. [DOI: 10.1016/j.bbalip.2012.07.019] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/20/2012] [Accepted: 07/24/2012] [Indexed: 02/08/2023]
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Woo DH, Kim SK, Lim HJ, Heo J, Park HS, Kang GY, Kim SE, You HJ, Hoeppner DJ, Kim Y, Kwon H, Choi TH, Lee JH, Hong SH, Song KW, Ahn EK, Chenoweth JG, Tesar PJ, McKay RDG, Kim JH. Direct and indirect contribution of human embryonic stem cell-derived hepatocyte-like cells to liver repair in mice. Gastroenterology 2012; 142:602-11. [PMID: 22138358 DOI: 10.1053/j.gastro.2011.11.030] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 11/02/2011] [Accepted: 11/19/2011] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Many studies of embryonic stem cells have investigated direct cell replacement of damaged tissues, but little is known about how donor cell-derived signals affect host tissue regeneration. We investigated the direct and indirect roles of human embryonic stem cell-derived cells in liver repair in mice. METHODS To promote the initial differentiation of human embryonic stem cells into mesendoderm, we activated the β-catenin signaling pathway with lithium; cells were then further differentiated into hepatocyte-like cells. The differentiated cells were purified by indocyanine green staining and laser microdissection and characterized by immunostaining, polymerase chain reaction, biochemical function, electron microscopy, and transplantation analyses. To investigate indirect effects of these cells, secreted proteins (secretomes) were analyzed by a label-free quantitative mass spectrometry. Carbon tetrachloride was used to induce acute liver injury in mice; cells or secreted proteins were administered by intrasplenic or intraperitoneal injection, respectively. RESULTS The differentiated hepatocyte-like cells had multiple features of normal hepatocytes, engrafted efficiently into mice, and continued to have hepatic features; they promoted proliferation of host hepatocytes and revascularization of injured host liver tissues. Proteomic analysis identified proteins secreted from these cells that might promote host tissue repair. Injection of the secreted proteins into injured livers of mice promoted significant amounts of tissue regeneration without cell grafts. CONCLUSIONS Hepatocyte-like cells derived from human embryonic stem cells contribute to recovery of injured liver tissues in mice, not only by cell replacement but also by delivering trophic factors that support endogenous liver regeneration.
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Affiliation(s)
- Dong-Hun Woo
- Laboratory of Stem Cell Biology, Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
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Assimakopoulos SF, Tsamandas AC, Alexandris IH, Georgiou C, Vagianos CE, Scopa CD. Stimulation of oval cell and hepatocyte proliferation by exogenous bombesin and neurotensin in partially hepatectomized rats. World J Gastrointest Pathophysiol 2011; 2:146-54. [PMID: 22180848 PMCID: PMC3240906 DOI: 10.4291/wjgp.v2.i6.146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 11/07/2011] [Accepted: 11/14/2011] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of the neuropeptides bombesin (BBS) and neurotensin (NT) on oval cell proliferation in partially hepatectomized rats not pretreated with a known hepatocyte inhibitor.
METHODS: Seventy male Wistar rats were randomly divided into five groups: I = controls, II = sham operated, III = partial hepatectomy 70% (PHx), IV = PHx + BBS (30 μg/kg per day), V = PHx + NT (300 μg/kg per day). Forty eight hours after liver resection, portal endotoxin levels and hepatic glutathione redox state were determined. α-fetoprotein (AFP) mRNA (in situ hybridisation), cytokeratin-19 and Ki67 antigen expression (immunohistochemistry) and apoptosis (TUNEL) were evaluated on liver tissue samples. Cells with morphological features of oval cells that were cytokeratin-19 (+) and AFP mRNA (+) were scored in morphometric analysis and their proliferation was recorded. In addition, the proliferation and apoptotic rates of hepatocytes were determined.
RESULTS: In the control and sham operated groups, oval cells were significantly less compared to groups III, IV and V (P < 0.001). The neuropeptides BBS and NT significantly increased the proliferation of oval cells compared to group III (P < 0.001). In addition, BBS and NT induced a significant increase of hepatocyte proliferation (P < 0.001), whereas it decreased their apoptotic activity (P < 0.001) compared to group III. BBS and NT significantly decreased portal endotoxemia (P < 0.001) and increased the hepatic GSH: GSSG ratio (P < 0.05 and P < 0.001, respectively) compared to group III.
CONCLUSION: BBS and NT stimulated oval cell proliferation in a model of liver regeneration, without use of concomitant suppression of hepatocyte proliferation as oval cell activation stimuli, and improved the hepatocyte regenerative response. This peptides-induced combined stimulation of oval cell and hepatocyte proliferation might serve as a possible treatment modality for several liver diseases.
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Kobayashi NR, Hawes SM, Crook JM, Pébay A. G-protein coupled receptors in stem cell self-renewal and differentiation. Stem Cell Rev Rep 2010; 6:351-66. [PMID: 20625855 DOI: 10.1007/s12015-010-9167-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Stem cells have great potential for understanding early development, treating human disease, tissue trauma and early phase drug discovery. The factors that control the regulation of stem cell survival, proliferation, migration and differentiation are still emerging. Some evidence now exists demonstrating the potent effects of various G-protein coupled receptor (GPCR) ligands on the biology of stem cells. This review aims to give an overview of the current knowledge of the regulation of embryonic and somatic stem cell maintenance and differentiation by GPCR ligands.
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Wu JM, Xu Y, Skill NJ, Sheng H, Zhao Z, Yu M, Saxena R, Maluccio MA. Autotaxin expression and its connection with the TNF-alpha-NF-kappaB axis in human hepatocellular carcinoma. Mol Cancer 2010; 9:71. [PMID: 20356387 PMCID: PMC2867819 DOI: 10.1186/1476-4598-9-71] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Accepted: 03/31/2010] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Autotaxin (ATX) is an extracellular lysophospholipase D that generates lysophosphatidic acid (LPA) from lysophosphatidylcholine (LPC). Both ATX and LPA have been shown to be involved in many cancers. However, the functional role of ATX and the regulation of ATX expression in human hepatocellular carcinoma (HCC) remain elusive. RESULTS In this study, ATX expression was evaluated in tissues from 38 human HCC and 10 normal control subjects. ATX was detected mainly in tumor cells within tissue sections and its over-expression in HCC was specifically correlated with inflammation and liver cirrhosis. In addition, ATX expression was examined in normal human hepatocytes and liver cancer cell lines. Hepatoma Hep3B and Huh7 cells displayed stronger ATX expression than hepatoblastoma HepG2 cells and normal hepatocytes did. Proinflammtory cytokine tumor necrosis factor alpha (TNF-alpha) promoted ATX expression and secretion selectively in Hep3B and Huh7 cells, which led to a corresponding increase in lysophospholipase-D activity. Moreover, we explored the mechanism governing the expression of ATX in hepatoma cells and established a critical role of nuclear factor-kappa B (NF-kappaB) in basal and TNF-alpha induced ATX expression. Further study showed that secreted enzymatically active ATX stimulated Hep3B cell invasion. CONCLUSIONS This report highlights for the first time the clinical and biological evidence for the involvement of ATX in human HCC. Our observation that links the TNF-alpha/NF-kappaB axis and the ATX-LPA signaling pathway suggests that ATX is likely playing an important role in inflammation related liver tumorigenesis.
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Affiliation(s)
- Jian-Min Wu
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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Xu YJ, Tappia PS, Goyal RK, Dhalla NS. Mechanisms of the lysophosphatidic acid-induced increase in [Ca(2+)](i) in skeletal muscle cells. J Cell Mol Med 2008; 12:942-54. [PMID: 18494935 PMCID: PMC4401138 DOI: 10.1111/j.1582-4934.2008.00139.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Although lysophosphatidic acid (LPA) is known to increase intracellularfree calcium concentration ([Ca2+]i) in different cell types, the effect of LPA on the skeletal muscle cells is not known. The present study was therefore undertaken to examine the effect of LPA on the [Ca2+]i in C2C12 cells. LPA induced a concentration and time dependent increase in [Ca2+]i, which was inhibited by VPC12249, VPC 32183 and dioctanoyl glycerol pyrophosphate, LPA1/3 receptor antagonists. Pertussis toxin, a Gi protein inhibitor, also inhibited the LPA-induced increase in [Ca2+]i. Inhibition of tyrosine kinase activities with tyrphostin A9 and genistein also prevented the increase in [Ca2+]i due to LPA. Likewise, wortmannin and LY 294002, phosphatidylinositol 3-kinase (PI3-K) inhibitors, inhibited [Ca2+]i response to LPA. The LPA effect was also attenuated by ethylene glycolbis(β-aminoethylether)-N,N,N′,N′-tetraacetic acid (EGTA), an extracellular Ca2+ chelator, Ni2+ and KB-R7943, inhibitors of the Na+-Ca2+ exchanger; the receptor operated Ca2+ channel (ROC) blockers, 2-aminoethoxydiphenyl borate and SK&F 96365. However, the L-type Ca2+ channel blockers, verapamil and diltiazem; the store operated Ca2+ channel blockers, La3+ and Gd3+; a sarcoplasmic reticulum calcium pump inhibitor, thapsigargin; an inositol trisphosphate receptor antagonist, xestospongin and a phospholipase C inhibitor, U73122, did not prevent the increase [Ca2+]i due to LPA. Our data suggest that the LPA-induced increase in [Ca2+]i might occur through Gi-protein coupled LPA1/3 receptors that may be linked to tyrosine kinase and PI3-K, and may also involve the Na+-Ca2+ exchanger as well as the ROC. In addition, LPA stimulated C2C12 cell proliferation via PI3-K. Thus, LPA may be an important phospholipid in the regulation of [Ca2+]i and growth of skeletal muscle cells.
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Affiliation(s)
- Yan-Jun Xu
- Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, Winnipeg, Manitoba, Canada
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Stem cell regulation by lysophospholipids. Prostaglandins Other Lipid Mediat 2007; 84:83-97. [PMID: 17991611 DOI: 10.1016/j.prostaglandins.2007.08.004] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2007] [Accepted: 08/29/2007] [Indexed: 11/24/2022]
Abstract
Lysophosphatidic acid (LPA) and sphingosine 1-phosphate (S1P) regulate a diverse range of mammalian cell processes, largely through engaging multiple G protein-coupled receptors specific for these lysophospholipids. LPA and S1P have been clearly identified to have widespread physiological and pathophysiological actions, controlling events within the reproductive, gastrointestinal, vascular, nervous and immune systems, and also having a prominent role in cancer. Here we review the recent literature showing the additional emerging role for LPA and S1P in the regulation of stem cells and their progenitors. We discuss the role of these lysophospholipids in regulating the proliferation, survival, differentiation and migration of a range of adult and embryonic stem cells and progenitors, and thus are likely to play a substantial role in the maintenance, generation, mobilisation and homing of stem cell and progenitor populations in the body.
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Knight B, Matthews VB, Olynyk JK, Yeoh GC. Jekyll and Hyde: evolving perspectives on the function and potential of the adult liver progenitor (oval) cell. Bioessays 2006; 27:1192-202. [PMID: 16237666 DOI: 10.1002/bies.20311] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The liver progenitor cell (LPC) has enormous potential for use in cell therapy to treat liver disease. Since liver regenerates readily from pre-existing hepatocytes, a role for LPCs and, indeed, their existence have been questioned. Research during the last decade has established that LPCs are an important alternative source of cells for liver regeneration. Their utility for cell therapy lies in their ability to generate both hepatocytes and cholangiocytes. However, they are observed in liver diseases that often lead to cancer and there is experimental evidence that implicates LPCs as the source of tumours. This article provides a brief history of the studies that established the functional importance of LPCs in liver disease. It focuses on mouse models that have led to the identification of factors that regulate LPC growth and differentiation and discusses LPCs derived from different sources. Recent promising results from both in vitro and vivo studies suggest that LPCs could be useful for cell therapy. In the context of liver disease, LPCs may indeed be the cell of the future and understandably "our favourite cell".
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Affiliation(s)
- Belinda Knight
- School of Medicine and Pharmacology, University of Western Australia
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Abstract
One of the most active areas of research in medicine today is stem cell biology. This review introduces the reader to the field of stem cell biology and its therapeutic potential. More importantly, the potential application of stem cell therapy in acute lung injury will be explored.
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Affiliation(s)
- Ronald C Sanders
- Divison of Pediatric Critical Care, Department of Pediatrics, University of Florida, Gainesville, 32610, USA.
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Luna G, Paez J, Cardier JE. Expression of the hematopoietic stem cell antigen Sca-1 (LY-6A/E) in liver sinusoidal endothelial cells: possible function of Sca-1 in endothelial cells. Stem Cells Dev 2005; 13:528-35. [PMID: 15588510 DOI: 10.1089/scd.2004.13.528] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Several reports have shown that the expression of Sca-1 (Ly-6A/E), the most widely used murine hematopoietic stem cell marker, is restricted to blood vessels in several nonhematopoietic tissues. However, there is no information about which components are expressing Sca-1, and what the role of Sca-1 could be. Because we have previously shown that murine liver endothelial cells from the hepatic sinusoid (LSEC) express some HSC markers (i. e., CD34 and c-kit), we hypothesized that these cells could also express Sca-1. In this work, we show that Sca-1 is constitutively expressed in LSEC, as well as in the liver sinusoid lumen. The expression of Sca-1 in LSEC was confirmed at the mRNA and protein level by reverse transcriptase (RT)-PCR, flow cytometry, and immunofluorescence studies. The expression of Sca-1 was enhanced on the surface of LSEC by tumor necrosis factor (TNF). We examined whether Sca-1 ligation on the surface of LSEC regulates some biological response in these cells. Our results show that ligation of Sca-1 by the anti-Ly-6A/E monoclonal antibody (mAb) D7 stimulated the growth of LSEC and the production of interleukin-6 (IL-6) by these cells. To our knowledge, this is the first report that LSEC express Sca-1, which may constitute additional support to the theory of a common progenitor for the hematopoietic and endothelial cells. Our results show a novel role of Sca-1, indicating that it induces activation of LSEC to proliferate and to produce IL-6. These results suggest that Sca-1 may participate in several clinical conditions such as angiogenesis and inflammation.
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Affiliation(s)
- Gonzalo Luna
- Laboratorio de Patología Celular y Molecular, Centro de Medicina Experimental, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas 1020-A, Venezuela
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Svetlov SI, Ignatova TN, Wang KKW, Hayes RL, English D, Kukekov VG. Lysophosphatidic Acid Induces Clonal Generation of Mouse Neurospheres via Proliferation of Sca-1- and AC133-Positive Neural Progenitors. Stem Cells Dev 2004; 13:685-93. [PMID: 15684836 DOI: 10.1089/scd.2004.13.685] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Neural stem/progenitor cells are clonogenic in vitro and produce neurospheres in serum-free medium containing epidermal growth factor (EGF) and fibroblast growth factor (FGF2). Here, we demonstrate that lysophosphatidic acid (LPA) instigated the clonal generation of neurospheres from dissociated mouse postnatal forebrain in the absence of EGF and FGF2. LPA induced proliferation of cells which co-expressed Sca-1 antigen and AC133, markers of primitive hematopoietic and neural stem/progenitor cells. Clonal expansion of these cells induced by LPA was inhibited by diacylglycerol- pyrophosphate (DGPP), an antagonist of the LPA receptor subtypes LPA1 and LPA3. Moreover, Sca-1- and AC133-positive cells of these neurospheres expressed LPA1, LPA2, and LPA3, suggesting important roles for these LPA receptors in proliferation of neural progenitors. LPA induced neurospheres to differentiate on an adherent laminin/poly-L-ornithine matrix. In differentiating neurospheres, LPA receptors co-localized with betaIII-tubulin, nestin, and CNPase, but not with glial fibrillary acidic protein (GFAP), a marker of astrocyte lineage. Our results demonstrate for the first time that lysophosphatidic acid induces clonal neurosphere development via proliferation of AC133/Sca-1-positive stem cells by a receptor-dependent mechanism. This differentiation was characterized by the initial co-localization of neural specific antigens at sites of LPA receptor expression upon their interaction with the inducing agonist.
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Affiliation(s)
- Stanislav I Svetlov
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA.
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Chen YK, Wang YM, Li JG, Lang S. Biological characteristics of rat hepatic oval cells. Shijie Huaren Xiaohua Zazhi 2003; 11:430-433. [DOI: 10.11569/wcjd.v11.i4.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To observe the morphological parameters, phenotypes and evolution of hepatic oval cells in rats.
METHODS Rat models for hepatic oval cell proliferation were established, and cell image analysis and immunohistochemical staining of hepatic oval cells were performed on the tissue sections.
RESULTS Hepatic oval cells were characterized by small size, oval shape and ovoid nuclei. The plasma of the cells was positive for cytokeratin (CK) 19, OV6, alfa-fetal protein (AFP) and vimentin staining, and negative for leucocyte common antigen (LCA) staining. The nuclei were positive for proliferating cell nuclear antigen (PCNA). Some hepatocyte-like cells were discerned around the portal tracts and these cells were positive for CK19 and OV6 staining.
CONCLUSION Hepatic oval cells differ from hepatocytes morphologically and express the phenotypes of ductular cells and hepatocytes. Hepatocyte-like cells are most likely the intermediate transition cells between hepatic oval cells and hepatocytes.
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Affiliation(s)
- Yao-Kai Chen
- Institute of Infectious Diseases, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Yu-Ming Wang
- Institute of Infectious Diseases, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Jun-Gang Li
- Institute of Infectious Diseases, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Song Lang
- Institute of Infectious Diseases, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
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