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Shemies RS, Gaber TZ, Baiomy A, Aladle DA, Mosbah A, Abdel-Hady ES, Sayed-Ahmed N, Sobh M. Angiogenic markers predict kidney injury and obstetric complications in women with preeclampsia and pregnancy-related acute kidney injury. Ther Apher Dial 2021; 26:306-315. [PMID: 33533567 DOI: 10.1111/1744-9987.13633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 01/25/2021] [Accepted: 02/01/2021] [Indexed: 11/28/2022]
Abstract
Pregnancy-related acute kidney injury (PRAKI) particularly on top of preeclampsia (PE) represents a major cause of maternal and fetal morbidity and mortality. Reliable diagnostic tools are needed to further evaluate the diagnosis and prognosis of PRAKI. Our objective was to study the diagnostic and prognostic value of angiogenic markers (e.g., stromal cell-derived factor 1 (SDF-1), vascular endothelial growth factor (VEGF), alarmins as uric acid) in women with PE and PRAKI. This prospective study included three groups; PRAKI, PE patients, and healthy controls that were compared regarding serum levels of the studied markers correlated to renal, maternal, and fetal outcomes. SDF-1, VEGF, and uric acid levels were significantly different between the three included groups and predicted PRAKI diagnosis. Patients with hemolysis, elevated liver enzymes, and low platelet (HELLP) syndrome exhibited the highest titers of SDF-1 and VEGF. A positive correlation was found between SDF-1 and renal recovery. Conclusively, serum assays of SDF-1, VEGF, and uric acid may add a diagnostic value in PRAKI and PE.
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Affiliation(s)
| | - Tamer Zaki Gaber
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura, Egypt
| | - Azza Baiomy
- Clinical Pathology Department, Mansoura University, Mansoura, Egypt
| | - Doaa A Aladle
- Clinical Pathology Department, Mansoura University, Mansoura, Egypt
| | - Alaa Mosbah
- Obstetrics and Gynecology Departments, Mansoura University, Mansoura, Egypt
| | - El-Said Abdel-Hady
- Obstetrics and Gynecology Departments, Mansoura University, Mansoura, Egypt
| | - Nagy Sayed-Ahmed
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura, Egypt
| | - Mohammed Sobh
- Mansoura Nephrology and Dialysis Unit, Mansoura University, Mansoura, Egypt
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2
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El-Saie A, Shivanna B. Novel Strategies to Reduce Pulmonary Hypertension in Infants With Bronchopulmonary Dysplasia. Front Pediatr 2020; 8:201. [PMID: 32457857 PMCID: PMC7225259 DOI: 10.3389/fped.2020.00201] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 04/02/2020] [Indexed: 01/10/2023] Open
Abstract
Bronchopulmonary dysplasia (BPD) is a developmental lung disorder of preterm infants primarily caused by the failure of host defense mechanisms to prevent tissue injury and facilitate repair. This disorder is the most common complication of premature birth, and its incidence remains unchanged over the past few decades. Additionally, BPD increases long-term cardiopulmonary and neurodevelopmental morbidities of preterm infants. Pulmonary hypertension (PH) is a common morbidity of BPD. Importantly, the presence of PH increases both the short- and long-term morbidities and mortality in BPD infants. Further, there are no curative therapies for this complex disease. Besides providing an overview of the pathogenesis and diagnosis of PH associated with BPD, we have attempted to comprehensively review and summarize the current literature on the interventions to prevent and/or mitigate BPD and PH in preclinical studies. Our goal was to provide insight into the therapies that have a high translational potential to meaningfully manage BPD patients with PH.
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Affiliation(s)
- Ahmed El-Saie
- Department of Pediatrics, Section of Neonatology, Baylor College of Medicine, Texas Children's Hospital, Houston, TX, United States
| | - Binoy Shivanna
- Department of Pediatrics, Section of Neonatology, Baylor College of Medicine, Texas Children's Hospital, Houston, TX, United States
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3
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Guerra K, Bryan C, Dapaah-Siakwan F, Sammour I, Drummond S, Zambrano R, Chen P, Huang J, Sharma M, Shrager S, Benny M, Wu S, Young KC. Intra-tracheal administration of a naked plasmid expressing stromal derived factor-1 improves lung structure in rodents with experimental bronchopulmonary dysplasia. Respir Res 2019; 20:255. [PMID: 31718614 PMCID: PMC6852969 DOI: 10.1186/s12931-019-1224-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 10/29/2019] [Indexed: 12/15/2022] Open
Abstract
Background Bronchopulmonary dysplasia (BPD) is characterized by alveolar simplification and disordered angiogenesis. Stromal derived factor-1 (SDF-1) is a chemokine which modulates cell migration, proliferation, and angiogenesis. Here we tested the hypothesis that intra-tracheal (IT) administration of a naked plasmid DNA expressing SDF-1 would attenuate neonatal hyperoxia-induced lung injury in an experimental model of BPD, by promoting angiogenesis. Design/methods Newborn Sprague-Dawley rat pups (n = 18–20/group) exposed to room air (RA) or hyperoxia (85% O2) from postnatal day (P) 1 to 14 were randomly assigned to receive IT a naked plasmid expressing SDF-1, JVS-100 (Juventas Therapeutics, Cleveland, Ohio) or placebo (PL) on P3. Lung alveolarization, angiogenesis, inflammation, vascular remodeling and pulmonary hypertension (PH) were assessed on P14. PH was determined by measuring right ventricular systolic pressure (RVSP) and the weight ratio of the right to left ventricle + septum (RV/LV + S). Capillary tube formation in SDF-1 treated hyperoxia-exposed human pulmonary microvascular endothelial cells (HPMEC) was determined by matrigel assay. Data is expressed as mean ± SD and analyzed by two-way ANOVA. Results Exposure of neonatal pups to 14 days of hyperoxia decreased lung SDF-1 gene expression. Moreover, whilst hyperoxia exposure inhibited capillary tube formation in HPMEC, SDF-1 treatment increased tube length and branching in HPMEC. PL-treated hyperoxia-exposed pups had decreased alveolarization and lung vascular density. This was accompanied by an increase in RVSP, RV/LV + S, pulmonary vascular remodeling and inflammation. In contrast, IT JVS-100 improved lung structure, reduced inflammation, PH and vascular remodeling. Conclusions Intratracheal administration of a naked plasmid expressing SDF-1 improves alveolar and vascular structure in an experimental model of BPD. These findings suggest that therapies which modulate lung SDF-1 expression may have beneficial effects in preterm infants with BPD.
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Affiliation(s)
- Kasonya Guerra
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Carleene Bryan
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Frederick Dapaah-Siakwan
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Ibrahim Sammour
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Shelly Drummond
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Ronald Zambrano
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Pingping Chen
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Jian Huang
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Mayank Sharma
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Sebastian Shrager
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Merline Benny
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Shu Wu
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA
| | - Karen C Young
- Department of Pediatrics, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA. .,Batchelor Children's Research Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA. .,The Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, 1580 NW 10th Avenue RM-344, Miami, FL, 33136, USA.
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4
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Gomes SA, Hare JM, Rangel EB. Kidney-Derived c-Kit + Cells Possess Regenerative Potential. Stem Cells Transl Med 2019; 7:317-324. [PMID: 29575816 PMCID: PMC5866938 DOI: 10.1002/sctm.17-0232] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 12/15/2017] [Accepted: 01/14/2018] [Indexed: 12/27/2022] Open
Abstract
Kidney‐derived c‐Kit+ cells exhibit progenitor/stem cell properties in vitro (self‐renewal capacity, clonogenicity, and multipotentiality). These cells can regenerate epithelial tubular cells following ischemia‐reperfusion injury and accelerate foot processes effacement reversal in a model of acute proteinuria in rats. Several mechanisms are involved in kidney regeneration by kidney‐derived c‐Kit+ cells, including cell engraftment and differentiation into renal‐like structures, such as tubules, vessels, and podocytes. Moreover, paracrine mechanisms could also account for kidney regeneration, either by stimulating proliferation of surviving cells or modulating autophagy and podocyte cytoskeleton rearrangement through mTOR‐Raptor and ‐Rictor signaling, which ultimately lead to morphological and functional improvement. To gain insights into the functional properties of c‐Kit+ cells during kidney development, homeostasis, and disease, studies on lineage tracing using transgenic mice will unveil their fate. The results obtained from these studies will set the basis for establishing further investigation on the therapeutic potential of c‐Kit+ cells for treatment of kidney disease in preclinical and clinical studies. stemcellstranslationalmedicine2018;7:317–324
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Affiliation(s)
- Samirah A Gomes
- Laboratory of Cellular, Genetic, and Molecular Nephrology, Renal Division, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Joshua M Hare
- Interdisciplinary Stem Cell Institute, Leonard M Miller School of Medicine, University of Miami, Miami, Florida, USA.,Department of Molecular and Cellular Pharmacology, Leonard M Miller School of Medicine, University of Miami, Miami, Florida, USA.,Division of Cardiology, Leonard M Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Erika B Rangel
- Instituto Israelita de Ensino e Pesquisa Albert Einstein, Hospital Israelita Albert Einstein, São Paulo, São Paulo, Brazil.,Division of Nephrology, Federal University of São Paulo, São Paulo, São Paulo, Brazil
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Exosomal Expression of CXCR4 Targets Cardioprotective Vesicles to Myocardial Infarction and Improves Outcome after Systemic Administration. Int J Mol Sci 2019; 20:ijms20030468. [PMID: 30678240 PMCID: PMC6386845 DOI: 10.3390/ijms20030468] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 01/20/2019] [Indexed: 02/07/2023] Open
Abstract
Cell therapy has been evaluated to enhance heart function after injury. Delivered cells mostly act via paracrine mechanisms, including secreted growth factors, cytokines, and vesicles, such as exosomes (Exo). Intramyocardial injection of cardiac-resident progenitor cells (CPC)-derived Exo reduced scarring and improved cardiac function after myocardial infarction in rats. Here, we explore a clinically relevant approach to enhance the homing process to cardiomyocytes (CM), which is crucial for therapeutic efficacy upon systemic delivery of Exo. By overexpressing exosomal CXCR4, we increased the efficacy of plasmatic injection of cardioprotective Exo-CPC by increasing their bioavailability to ischemic hearts. Intravenous injection of ExoCXCR4 significantly reduced infarct size and improved left ventricle ejection fraction at 4 weeks compared to ExoCTRL (p < 0.01). Hemodynamic measurements showed that ExoCXCR4 improved dp/dt min, as compared to ExoCTRL and PBS group. In vitro, ExoCXCR4 was more bioactive than ExoCTRL in preventing CM death. This in vitro effect was independent from SDF-1α, as shown by using AMD3100 as specific CXCR4 antagonist. We showed, for the first time, that systemic administration of Exo derived from CXCR4-overexpressing CPC improves heart function in a rat model of ischemia reperfusion injury These data represent a substantial step toward clinical application of Exo-based therapeutics in cardiovascular disease.
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6
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CXCL12 and MYC control energy metabolism to support adaptive responses after kidney injury. Nat Commun 2018; 9:3660. [PMID: 30202007 PMCID: PMC6131511 DOI: 10.1038/s41467-018-06094-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 08/15/2018] [Indexed: 01/12/2023] Open
Abstract
Kidney injury is a common complication of severe disease. Here, we report that injuries of the zebrafish embryonal kidney are rapidly repaired by a migratory response in 2-, but not in 1-day-old embryos. Gene expression profiles between these two developmental stages identify cxcl12a and myca as candidates involved in the repair process. Zebrafish embryos with cxcl12a, cxcr4b, or myca deficiency display repair abnormalities, confirming their role in response to injury. In mice with a kidney-specific knockout, Cxcl12 and Myc gene deletions suppress mitochondrial metabolism and glycolysis, and delay the recovery after ischemia/reperfusion injury. Probing these observations in zebrafish reveal that inhibition of glycolysis slows fast migrating cells and delays the repair after injury, but does not affect the slow cell movements during kidney development. Our findings demonstrate that Cxcl12 and Myc facilitate glycolysis to promote fast migratory responses during development and repair, and potentially also during tumor invasion and metastasis.
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7
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Liu X, Liu H, Sun L, Chen Z, Nie H, Sun A, Liu G, Guan G. The role of long-term label-retaining cells in the regeneration of adult mouse kidney after ischemia/reperfusion injury. Stem Cell Res Ther 2016; 7:68. [PMID: 27137761 PMCID: PMC4852428 DOI: 10.1186/s13287-016-0324-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 03/22/2016] [Accepted: 04/12/2016] [Indexed: 12/17/2022] Open
Abstract
Background Label-retaining cells (LRCs) have been recognized as rare stem and progenitor-like cells, but their complex biological features in renal repair at the cellular level have never been reported. This study was conducted to evaluate whether LRCs in kidney are indeed renal stem/progenitor cells and to delineate their potential role in kidney regeneration. Methods We utilized a long-term pulse chase of 5-bromo-2'-deoxyuridine (BrdU)-labeled cells in C57BL/6J mice to identify renal LRCs. We tracked the precise morphological characteristics and locations of BrdU+LRCs by both immunohistochemistry and immunofluorescence. To examine whether these BrdU+LRCs contribute to the repair of acute kidney injury, we analyzed biological characteristics of BrdU+LRCs in mice after ischemia/reperfusion (I/R) injury. Results The findings revealed that the nuclei of BrdU+ LRCs exhibited different morphological characteristics in normal adult kidneys, including nuclei in pairs or scattered, fragmented or intact, strongly or weakly positive. Only 24.3 ± 1.5 % of BrdU+ LRCs co-expressed with Ki67 and 9.1 ± 1.4 % of BrdU+ LRCs were positive for TUNEL following renal I/R injury. Interestingly, we found that newly regenerated cells formed a niche-like structure and LRCs in pairs tended to locate in this structure, but the number of those LRCs was very low. We found a few scattered LRCs co-expressed Lotus tetragonolobus agglutinin (LTA) in the early phase of injury, suggesting differentiation of those LRCs in mouse kidney. Conclusions Our findings suggest that LRCs are not a simple type of slow-cycling cells in adult kidneys, indicating a limited role of these cells in the regeneration of I/R injured kidney. Thus, LRCs cannot reliably be considered stem/progenitor cells in the regeneration of adult mouse kidney. When researchers use this technique to study the cellular basis of renal repair, these complex features of renal LRCs and the purity of real stem cells among renal LRCs should be considered.
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Affiliation(s)
- Xiangchun Liu
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China
| | - Haiying Liu
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China.
| | - Lina Sun
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China
| | - Zhixin Chen
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China
| | - Huibin Nie
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China
| | - Aili Sun
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China
| | - Gang Liu
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China
| | - Guangju Guan
- Department of Nephrology, The Second Hospital of Shandong University,Shandong University, Jinan, PR. China.
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Fanni D, Gerosa C, Vinci L, Ambu R, Dessì A, Eyken PV, Fanos V, Faa G. Interstitial stromal progenitors during kidney development: here, there and everywhere. J Matern Fetal Neonatal Med 2016; 29:3815-20. [PMID: 26866875 DOI: 10.3109/14767058.2016.1147553] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
In recent years, the renal interstitium has been identified as the site of multiple cell types, giving rise to multiple contiguous cellular networks with multiple fundamental structural and functional roles. Few studies have been carried out on the morphological and functional properties of the stromal/interstitial renal cells during the intrauterine life. This work was aimed at reviewing the peculiar features of renal interstitial stem/progenitor cells involved in kidney development. The origin of the renal interstitial progenitor cells remains unknown. During kidney development, besides the Six2 + cells of the cap mesenchyme, a self-renewing progenitor population, characterized by the expression of Foxd1, represents the first actor of the non-nephrogenic lineage. Foxd1 + interstitial progenitors originate the cortical and the renal medullary interstitial progenitors. Here, the most important stromal/interstitial compartments present in the developing human kidney will be analyzed: capsular stromal cells, cortical interstitial cells, medullary interstitial cells, the interstitium inside the renal stem cell niche, Hilar interstitial cells and Ureteric interstitial cells. Data reported here indicate that the different interstitial compartments of the developing kidney are formed by different cell types that characterize the different renal areas. Further studies are needed to better characterize the different pools of renal interstitial progenitors and their role in human nephrogenesis.
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Affiliation(s)
- Daniela Fanni
- a Division of Pathology , Department of Surgical Sciences, University of Cagliari , Cagliari , Italy
| | - Clara Gerosa
- a Division of Pathology , Department of Surgical Sciences, University of Cagliari , Cagliari , Italy
| | - Laura Vinci
- a Division of Pathology , Department of Surgical Sciences, University of Cagliari , Cagliari , Italy
| | - Rossano Ambu
- a Division of Pathology , Department of Surgical Sciences, University of Cagliari , Cagliari , Italy
| | - Angelica Dessì
- b Department of Surgical Sciences , NICU Center and Puericulture Institute and Neonatal Section, University of Cagliari , Cagliari , Italy , and
| | - Peter Van Eyken
- c Department of Pathology , University Hospitals, KU , Leuven , Belgium
| | - Vassilios Fanos
- b Department of Surgical Sciences , NICU Center and Puericulture Institute and Neonatal Section, University of Cagliari , Cagliari , Italy , and
| | - Gavino Faa
- a Division of Pathology , Department of Surgical Sciences, University of Cagliari , Cagliari , Italy
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9
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Schwartz GJ, Gao X, Tsuruoka S, Purkerson JM, Peng H, D'Agati V, Picard N, Eladari D, Al-Awqati Q. SDF1 induction by acidosis from principal cells regulates intercalated cell subtype distribution. J Clin Invest 2015; 125:4365-74. [PMID: 26517693 DOI: 10.1172/jci80225] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 09/11/2015] [Indexed: 12/13/2022] Open
Abstract
The nephron cortical collecting duct (CCD) is composed of principal cells, which mediate Na, K, and water transport, and intercalated cells (ICs), which are specialized for acid-base transport. There are two canonical IC forms: acid-secreting α-ICs and HCO3-secreting β-ICs. Chronic acidosis increases α-ICs at the expense of β-ICs, thereby increasing net acid secretion by the CCD. We found by growth factor quantitative PCR array that acidosis increases expression of mRNA encoding SDF1 (or CXCL12) in kidney cortex and isolated CCDs from mouse and rabbit kidney cortex. Exogenous SDF1 or pH 6.8 media increased H+ secretion and decreased HCO3 secretion in isolated perfused rabbit CCDs. Acid-dependent changes in H+ and HCO3 secretion were largely blunted by AMD3100, which selectively blocks the SDF1 receptor CXCR4. In mice, diet-induced chronic acidosis increased α-ICs and decreased β-ICs. Additionally, IC-specific Cxcr4 deletion prevented IC subtype alterations and magnified metabolic acidosis. SDF1 was transcriptionally regulated and a target of the hypoxia-sensing transcription factor HIF1α. IC-specific deletion of Hif1a produced no effect on mice fed an acid diet, as α-ICs increased and β-ICs decreased similarly to that observed in WT littermates. However, Hif1a deletion in all CCD cells prevented acidosis-induced IC subtype distribution, resulting in more severe acidosis. Cultured principal cells exhibited an HIF1α-dependent increase of Sdf1 transcription in response to media acidification. Thus, our results indicate that principal cells respond to acid by producing SDF1, which then acts on adjacent ICs.
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MESH Headings
- Animals
- Cells, Cultured
- Chemokine CXCL12/biosynthesis
- Chemokine CXCL12/genetics
- Hydrogen-Ion Concentration
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Ion Transport/physiology
- Kidney Glomerulus/cytology
- Kidney Glomerulus/metabolism
- Kidney Tubules, Collecting/cytology
- Kidney Tubules, Collecting/metabolism
- Mice
- Mice, Transgenic
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Rabbits
- Receptors, CXCR4/genetics
- Receptors, CXCR4/metabolism
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Liu H, Li M, Du L, Yang P, Ge S. Local administration of stromal cell-derived factor-1 promotes stem cell recruitment and bone regeneration in a rat periodontal bone defect model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 53:83-94. [PMID: 26042694 DOI: 10.1016/j.msec.2015.04.002] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 03/03/2015] [Accepted: 04/01/2015] [Indexed: 01/07/2023]
Abstract
Stromal cell-derived factor-1 (SDF-1) recruits adult stem/progenitor cells via its specific receptor, C-X-C motif receptor 4 (CXCR4), to promote heart, kidney and tendon regeneration, but little is known about the effects of SDF-1 on bone regeneration in periodontal diseases. The objective of this study was to investigate whether local administration of SDF-1 in a collagen membrane scaffold enhanced the recruitment of host stem cells and improved periodontal bone defect repair. To this end, bone defects were established on the buccal side of bilateral mandibles in Wistar rats. After application of collagen membranes loaded with SDF-1 or phosphate-buffered saline (PBS) to the defects, the effects of SDF-1 on stem cell recruitment, inflammatory cell responses, angiogenesis, osteoclastogenesis, scaffold degradation, and bone regeneration were evaluated. It showed that SDF-1 recruited host-derived mesenchymal stem cells and hematopoietic stem cells to the wound area and significantly reduced the CD11b+ inflammatory cell response. Moreover, SDF-1 increased vascular formation, induced early bone osteoclastogenesis, accelerated scaffold degradation, and promoted the quality and quantity of regenerated bone. Our results suggest that this cell-free approach by local administration of SDF-1 may be an effective strategy for development as a simple and safe technique for periodontal bone regeneration.
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Affiliation(s)
- Hongrui Liu
- Shandong Provincial Key Laboratory of Oral Biomedicine, Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong Province, China
| | - Minqi Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong Province, China
| | - Lingqian Du
- Shandong Provincial Key Laboratory of Oral Biomedicine, Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong Province, China; The Second Hospital of Shandong University, Department of Stomatology, Jinan, Shandong Province, China
| | - Pishan Yang
- Shandong Provincial Key Laboratory of Oral Biomedicine, Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong Province, China.
| | - Shaohua Ge
- Shandong Provincial Key Laboratory of Oral Biomedicine, Department of Periodontology, School of Stomatology, Shandong University, Jinan, Shandong Province, China.
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11
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Wan X, Xia W, Gendoo Y, Chen W, Sun W, Sun D, Cao C. Upregulation of stromal cell-derived factor 1 (SDF-1) is associated with macrophage infiltration in renal ischemia-reperfusion injury. PLoS One 2014; 9:e114564. [PMID: 25478952 PMCID: PMC4257711 DOI: 10.1371/journal.pone.0114564] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 11/05/2014] [Indexed: 11/24/2022] Open
Abstract
Background Stromal cell-derived factor-1(SDF-1) is a chemotactic and angiogenic factor that mediates the repair of various tissues. As macrophages are important contributors to ischemic kidney injury, we examine the role of SDF-1 in a rodent model of ischemia-reperfusion (I/R) injury. Methods Male wild-type (WT) (C57BL/6) mice were subjected to bilateral I/R injury or sham operation in the presence or absence of macrophage depletion (liposomal clodronate [0.2 ml/20–25 g body weight i.p.]). Macrophage accumulation was assessed by immunohistochemistry. Tissue levels of SDF-1 (ELISA) and SDF-1 mRNA expression (real-time PCR) were measured. The cellular location of SDF-1 was assessed using immunohistochemical staining. Results Immunofluorescence staining of renal tissue sections confirmed macrophage depletion by liposomal clodronate. SDF-1 production was elevated in response to I/R injury and was significantly increased upon macrophage depletion. SDF-1 positive cells initially appeared initially in the cortex, and subsequently diffused to the outer medulla after I/R injury. Conclusions Our study demonstrates that SDF-1 is significantly upregulated during renal I/R. We hypothesize that SDF-1 upregulation may be an important macrophage effector mechanism during I/R injury.
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Affiliation(s)
- Xin Wan
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wenkai Xia
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yasser Gendoo
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wen Chen
- Department of Thoracic and Cardiovascular Surgery, Department of surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wenjin Sun
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Dong Sun
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Changchun Cao
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
- * E-mail:
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12
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Kramann R, Kusaba T, Humphreys BD. Who regenerates the kidney tubule? Nephrol Dial Transplant 2014; 30:903-10. [PMID: 25155054 DOI: 10.1093/ndt/gfu281] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Accepted: 07/27/2014] [Indexed: 12/21/2022] Open
Abstract
The kidney possesses profound regenerative potential and in some cases can recover completely 'restitutio at integrum' following an acute kidney injury (AKI). Emerging evidence strongly suggests that sometimes repair is incomplete, however, and, in this situation, an episode of AKI leads to future chronic kidney disease (CKD). Understanding the tubular response after AKI will shed light on the relationship between incomplete repair and future risk of CKD. The first repair phase after AKI is characterized by robust proliferation of epithelial cells in the proximal tubule. The exact source of these proliferating cells has been a source of controversy for the last decade. While nearly everyone now agrees that reparative cells arise within the proximal tubule, there is disagreement about whether all surviving cells possess an equivalent repair capacity through dedifferentiation, or alternatively whether a pre-existing intratubular stem cell population [so-called scattered tubular cells (STC)] is responsible for repair. This review will summarize the evidence on both sides of this issue and will discuss very recent genetic fate-tracing data that strongly points against the existence of intratubular stem cells but rather indicates that terminally differentiated proximal tubule epithelial cells undergo dedifferentiation upon injury to replace lost neighboring tubular epithelial cells through proliferative self-duplication. This new evidence includes data clearly indicating that STC are not committed tubular stem cells but instead represent individual dedifferentiated tubular epithelial cells that transiently express putative stem cell markers.
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Affiliation(s)
- Rafael Kramann
- Brigham and Women's Hospital, Boston, MA, USA Harvard Medical School, Boston, MA, USA Division of Nephrology, RWTH Aachen University, Aachen, Germany
| | - Tetsuro Kusaba
- Brigham and Women's Hospital, Boston, MA, USA Harvard Medical School, Boston, MA, USA
| | - Benjamin D Humphreys
- Brigham and Women's Hospital, Boston, MA, USA Harvard Medical School, Boston, MA, USA Harvard Stem Cell Institute, Cambridge, MA, USA
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13
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Zuk A, Gershenovich M, Ivanova Y, MacFarland RT, Fricker SP, Ledbetter S. CXCR₄antagonism as a therapeutic approach to prevent acute kidney injury. Am J Physiol Renal Physiol 2014; 307:F783-97. [PMID: 25080523 DOI: 10.1152/ajprenal.00685.2013] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We examined whether antagonism of the CXCR₄receptor ameliorates the loss of renal function following ischemia-reperfusion. CXCR₄is ubiquitously expressed on leukocytes, known mediators of renal injury, and on bone marrow hematopoietic stem cells (HSCs). Plerixafor (AMD3100, Mozobil) is a small-molecule CXCR₄antagonist that mobilizes HSCs into the peripheral blood and also modulates the immune response in in vivo rodent models of asthma and rheumatoid arthritis. Treatment with plerixafor before and after ischemic clamping ameliorated kidney injury in a rat model of bilateral renal ischemia-reperfusion. Serum creatinine and blood urea nitrogen were significantly reduced 24 h after reperfusion, as were tissue injury and cell death. Plerixafor prevented the renal increase in the proinflammatory chemokines CXCL1 and CXCL5 and the cytokine IL-6. Flow cytometry of kidney homogenates confirmed the presence of significantly fewer leukocytes with plerixafor treatment; additionally, myeloperoxidase activity was reduced. AMD3465, a monocyclam analog of plerixafor, was similarly renoprotective. Four weeks postreperfusion, long-term effects included diminished fibrosis, inflammation, and ongoing renal injury. The mechanism by which CXCR₄inhibition ameliorates AKI is due to modulation of leukocyte infiltration and expression of proinflammatory chemokines/cytokines, rather than a HSC-mediated effect. The data suggest that CXCR₄antagonism with plerixafor may be a potential option to prevent AKI.
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Affiliation(s)
- A Zuk
- Tissue Protection and Repair Unit, Renal Science, Genzyme R&D Center, Framingham, Massachusetts;
| | - M Gershenovich
- Tissue Protection and Repair Unit, Renal Science, Genzyme R&D Center, Framingham, Massachusetts
| | - Y Ivanova
- Tissue Protection and Repair Unit, Renal Science, Genzyme R&D Center, Framingham, Massachusetts
| | - R T MacFarland
- Pharmacology and Preclinical Development, Genzyme R&D Center, Framingham, Massachusetts; and
| | - S P Fricker
- Immune-Mediated Disease Research, Genzyme R&D Center, Framingham, Massachusetts
| | - S Ledbetter
- Tissue Protection and Repair Unit, Renal Science, Genzyme R&D Center, Framingham, Massachusetts
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14
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Rangel EB, Gomes SA, Dulce RA, Premer C, Rodrigues CO, Kanashiro-Takeuchi RM, Oskouei B, Carvalho DA, Ruiz P, Reiser J, Hare JM. C-kit(+) cells isolated from developing kidneys are a novel population of stem cells with regenerative potential. Stem Cells 2014; 31:1644-56. [PMID: 23733311 DOI: 10.1002/stem.1412] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 04/02/2013] [Indexed: 12/26/2022]
Abstract
The presence of tissue specific precursor cells is an emerging concept in organ formation and tissue homeostasis. Several progenitors are described in the kidneys. However, their identity as a true stem cell remains elusive. Here, we identify a neonatal kidney-derived c-kit(+) cell population that fulfills all of the criteria as a stem cell. These cells were found in the thick ascending limb of Henle's loop and exhibited clonogenicity, self-renewal, and multipotentiality with differentiation capacity into mesoderm and ectoderm progeny. Additionally, c-kit(+) cells formed spheres in nonadherent conditions when plated at clonal density and expressed markers of stem cells, progenitors, and differentiated cells. Ex vivo expanded c-kit(+) cells integrated into several compartments of the kidney, including tubules, vessels, and glomeruli, and contributed to functional and morphological improvement of the kidney following acute ischemia-reperfusion injury in rats. Together, these findings document a novel neonatal rat kidney c-kit(+) stem cell population that can be isolated, expanded, cloned, differentiated, and used for kidney repair following acute kidney injury. These cells have important biological and therapeutic implications.
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Affiliation(s)
- Erika B Rangel
- Interdisciplinary Stem Cell Institute, São Paulo, São Paulo, Brazil; Sociedade Beneficente Albert Einstein, Albert Einstein Hospital, São Paulo, São Paulo, Brazil; Division of Nephrology, Department of Medicine, Federal University of São Paulo, São Paulo, São Paulo, Brazil
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15
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Chen D, Chen Z, Zhang Y, Park C, Al-Omari A, Moeckel GW. Role of medullary progenitor cells in epithelial cell migration and proliferation. Am J Physiol Renal Physiol 2014; 307:F64-74. [PMID: 24808539 DOI: 10.1152/ajprenal.00547.2013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
This study is aimed at characterizing medullary interstitial progenitor cells and to examine their capacity to induce tubular epithelial cell migration and proliferation. We have isolated a progenitor cell side population from a primary medullary interstitial cell line. We show that the medullary progenitor cells (MPCs) express CD24, CD44, CXCR7, CXCR4, nestin, and PAX7. MPCs are CD34 negative, which indicates that they are not bone marrow-derived stem cells. MPCs survive >50 passages, and when grown in epithelial differentiation medium develop phenotypic characteristics of epithelial cells. Inner medulla collecting duct (IMCD3) cells treated with conditioned medium from MPCs show significantly accelerated cell proliferation and migration. Conditioned medium from PGE2-treated MPCs induce tubule formation in IMCD3 cells grown in 3D Matrigel. Moreover, most of the MPCs express the pericyte marker PDGFR-b. Our study shows that the medullary interstitium harbors a side population of progenitor cells that can differentiate to epithelial cells and can stimulate tubular epithelial cell migration and proliferation. The findings of this study suggest that medullary pericyte/progenitor cells may play a critical role in collecting duct cell injury repair.
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Affiliation(s)
- Dong Chen
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut; and
| | - Zhiyong Chen
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China
| | - Yuning Zhang
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut; and
| | - Chanyoung Park
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut; and
| | - Ahmed Al-Omari
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut; and
| | - Gilbert W Moeckel
- Department of Pathology, Yale University School of Medicine, New Haven, Connecticut; and
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16
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Mao S, Huang S. The signaling pathway of stromal cell-derived factor-1 and its role in kidney diseases. J Recept Signal Transduct Res 2013; 34:85-91. [PMID: 24303939 DOI: 10.3109/10799893.2013.865746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The chemokine stromal cell-derived factor-1 (SDF-1) regulates the trafficking of progenitor cell (PGC) during embryonic development, cell chemotaxis, and postnatal homing into injury sites. SDF-1 also regulates cell growth, survival, adhesion and angiogenesis. However, in different tissues/cells, the role of SDF-1 is different, such as that it is increased in most of the tumors and associated with cancer metastasis, whereas it is essential for the development of vasculature. For kidney diseases, its role remains controversial. Signaling pathways might be very important in the pathogenesis of kidney diseases. We performed this review to provide a relatively complete signaling pathway flowchart for SDF-1 to the investigators who were interested in the role of SDF-1 in the pathogenesis of kidney diseases. Here, we reviewed the signal transduction pathway of SDF-1 and its role in the pathogenesis of kidney diseases.
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Affiliation(s)
- Song Mao
- Department of Nephrology, Nanjing Children's Hospital, Affiliated to Nanjing Medical University , Nanjing , China
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17
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Herrera M, Mirotsou M. Stem cells: potential and challenges for kidney repair. Am J Physiol Renal Physiol 2013; 306:F12-23. [PMID: 24197069 DOI: 10.1152/ajprenal.00238.2013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Renal damage resulting from acute and chronic kidney injury poses an important problem to public health. Currently, patients with end-stage renal disease rely solely on kidney transplantation or dialysis for survival. Emerging therapies aiming to prevent and reverse kidney damage are thus in urgent need. Although the kidney was initially thought to lack the capacity for self-repair, several studies have indicated that this might not be the case; progenitor and stem cells appear to play important roles in kidney repair under various pathological conditions. In this review, we summarize recent findings on the role of progenitor/stem cells on kidney repair as well as discuss their potential as a therapeutic approach for kidney diseases.
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Affiliation(s)
- Marcela Herrera
- Division of Cardiology, Genome Research Bldg. II, Rm. 4022, 210 Research Drive, Duke Univ. Medical Center, Durham, NC 27710.
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Abstract
PURPOSE OF REVIEW To briefly show which are the mechanisms and cell types involved in kidney regeneration and describe some of the therapies currently under study in regenerative medicine for kidney transplantation. RECENT FINDINGS The kidney contains cell progenitors that under specific circumstances have the ability to regenerate specific structures. Apart from the knowledge gained in the self-regenerative properties of the kidney, new concepts in regenerative medicine such as organ engineering and the use of mesenchymal stem cell-based therapies are currently the focus of attention in the field. SUMMARY Overall, kidney regeneration is a reality and the knowledge on how to control it will be one of the main scopes in the present and future.
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Simic D, Simutis F, Euler C, Thurby C, Peden WM, Bunch RT, Pilcher G, Sanderson T, Van Vleet T. Determination of relative Notch1 and gamma-secretase-related gene expression in puromycin-treated microdissected rat kidneys. Gene Expr 2013; 16:39-47. [PMID: 24397211 PMCID: PMC8750201 DOI: 10.3727/105221613x13806435102312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Notch signaling pathways are involved in the regulation of cell differentiation and are highly conserved across species. Notch ligand binding leads to gamma-secretase-mediated proteolytic cleavage of the Notch receptor releasing the Notch intracellular domain, resulting in its subsequent translocation into the nucleus and gene expression regulation. To investigate the level of expression of Notch signaling pathway components in microanatomic regions following renal injury, kidneys from untreated, vehicle control, and puromycin aminonucleoside (PA, 150 mg/kg)-treated rats were evaluated. Frozen tissue sections from rats were microdissected using laser capture microdissection (LCM) to obtain glomeruli, cortical (proximal) tubules, and collecting ducts, and relative gene expression levels of Presenilin1, Notch1 and Hes1 were determined. In untreated rats, the Notch1 expression in glomeruli was higher than in the proximal tubules and similar to that in collecting ducts, whereas Presenilin1 and Hes1 expressions were highest in the collecting ducts, followed by cortical tubules and glomeruli. Following PA-induced renal injury, Hes1 gene expression increased significantly in the glomeruli and tubules compared to the collecting ducts where no injury was observed microscopically. Although these data present some evidence of change in Notch signaling related to injury, the expression of Presenilin1, Notch1, and Hes1 in the microanatomic regions of the kidney following PA treatment were not significantly different when compared to controls. These results demonstrate that there are differences in Notch-related gene expression in the different microanatomic regions of the kidneys in rats and suggest a minimal role for Notch in renal injury induced by PA. In addition, this work shows that LCM coupled with the RT-PCR can be used to determine the relative differences in target gene expression within regions of a complex organ.
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Affiliation(s)
- Damir Simic
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA.
| | - Frank Simutis
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
| | - Catherine Euler
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
| | - Christina Thurby
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
| | - W Mike Peden
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
| | - R Todd Bunch
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
| | - Gary Pilcher
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
| | - Thomas Sanderson
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
| | - Terry Van Vleet
- Bristol-Myers Squibb Co., Drug Safety Evaluation, Mt. Vernon, IN, 47620, USA
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