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Fontaine JT, Rosehart AC, Joutel A, Dabertrand F. HB-EGF depolarizes hippocampal arterioles to restore myogenic tone in a genetic model of small vessel disease. Mech Ageing Dev 2020; 192:111389. [PMID: 33127441 PMCID: PMC7683376 DOI: 10.1016/j.mad.2020.111389] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/16/2020] [Accepted: 10/22/2020] [Indexed: 12/26/2022]
Abstract
Vascular cognitive impairment, the second most common cause of dementia, profoundly affects hippocampal-dependent functions. However, while the growing literature covers complex neuronal interactions, little is known about the sustaining hippocampal microcirculation. Here we examined vasoconstriction to physiological pressures of hippocampal arterioles, a fundamental feature of small arteries, in a genetic mouse model of CADASIL, an archetypal cerebral small vessel disease. Using diameter and membrane potential recordings on isolated arterioles, we observed both blunted pressure-induced vasoconstriction and smooth muscle cell depolarization in CADASIL. This impairment was abolished in the presence of voltage-gated potassium (KV1) channel blocker 4-aminopyridine, or by application of heparin-binding EGF-like growth factor (HB-EGF), which promotes KV1 channel down-regulations. Interestingly, we observed that HB-EGF induced a depolarization of the myocyte plasma membrane within the arteriolar wall in CADASIL, but not wild-type, arterioles. Collectively, our results indicate that hippocampal arterioles in CADASIL mice display a blunted contractile response to luminal pressure, similar to the defect we previously reported in cortical arterioles and pial arteries, that is rescued by HB-EGF. Hippocampal vascular dysfunction in CADASIL could then contribute to the decreased vascular reserve associated with decreased cognitive performance, and its correction may provide a therapeutic option for treating vascular cognitive impairment.
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Affiliation(s)
- Jackson T Fontaine
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Amanda C Rosehart
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Anne Joutel
- Department of Pharmacology, Larner College of Medicine University of Vermont, Burlington, VT, USA; Institute of Psychiatry and Neurosciences of Paris, INSERM UMR1266, University of Paris, GHU Paris Psychiatrie et Neurosciences, France
| | - Fabrice Dabertrand
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
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Tang XH, Lu MS, Deng S, Li M. [Role and mechanism of the regulation of nuclear factor-κB by heparin binding-epidermal growth factor-like growth factor in the induction of paclitaxel resistance of ovarian cancer]. Zhonghua Fu Chan Ke Za Zhi 2019; 54:255-261. [PMID: 31006192 DOI: 10.3760/cma.j.issn.0529-567x.2019.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the role and mechanism of the regulation of nuclear factor-κB (NF-κB) by heparin binding-epidermal growth factor-like growth factor (HB-EGF) in paclitaxel resistance of ovarian cancer in vitro and in vivo. Methods: (1) The detection of NF-κB expression: parental (A2780) and paclitaxel-resistant (A2780/Taxol) ovarian carcinoma cells were divided into four groups, named A2780 group, A2780+cross-reacting material 197 (CRM197, HB-EGF inhibitor) group, A2780/Taxol group and A2780/Taxol+CRM197 group. Among four groups, the expression level HB-EGF and epidermal growth factor receptor (EGFR) were examined by immunofluorescence double staining on confocal microscopy. Western blot was used to detect the expression level of NF-κB. In vivo, A2780 and A2780/Taxol cells were injected intraperitoneally to nude mouse to determine the expression level of NF-κB of the tumors from these four groups by immunohistochemistry method. (2) The detection on the function of NF-κB: A2780/Taxol cells were divided into four groups, named transfected with empty vector+saline group, NF-κB small interference RNA (siRNA)+saline group, empty vector+CRM197 group and NF-κB siRNA+CRM197 group respectively. Among four groups, the 50% inhibitory concentrations (IC(50)) of A2780/Taxol cells to paclitaxel, the expression level of plasma membrane glycoprotein (P-gp) and the effect of intracellular rhodomine123 (Rh123) accumulation were detected. Results: (1) The detection of NF-κB expression: the expression scores of HB-EGF protein among four groups were 5.6±1.3, 2.1±1.2, 11.7±3.5 and 6.2±1.4; the expression scores of EGFR protein were 5.1±1.6, 2.8±0.6, 10.4±3.1 and 5.6±1.9, respectively. The expression levels of NF-κB protein in the cells of the group named A2780, A2780+CRM197, A2780/Taxol and A2780/Taxol+CRM197 group were 1.89±0.23, 0.74±0.12, 3.45±0.16 and 1.31±0.08, respectively; the expression scores of NF-κB protein in the tissue tumors from four groups were 3.3±1.1, 1.4±0.4, 8.7±2.3 and 3.6±1.2, respectively. The expression level of HB-EGF, EGFR and NF-κB protein between A2780 and A2780/Taxol groups in vivo and in vitro were higher than these in A2780+CRM197 and A2780/Taxol+CRM197 group, while the expression level of HB-EGF, EGFR and NF-κB protein in A2780 group were lower than those in A2780/Taxol groups in vivo and in vitro (P<0.05). (2) The examination of NF-κB function: the IC(50) of A2780/Taxol cells to paclitaxel in groups transfected with empty vector+saline, NF-κB siRNA+saline, empty vector+CRM197 and NF-κB siRNA+CRM197 group were respectively (39.4±0.8), (7.6±0.6), (6.7±0.5) and (4.2±0.4) μmol/L, while the expression levels of P-gp protein among four groups were respectively 3.11±0.23,1.45±0.16, 1.73±0.21 and 0.68±0.14, the cellular Rh123 accumulation among four groups were respectively 110±15, 246±19, 231±22 and 296±24. The expression levels of IC(50) and P-gp protein in groups transfected with NF-κB siRNA+saline, empty vector+CRM197 and NF-κB siRNA+CRM197 group were significantly higher than those in group transfected with empty vector+saline group (P<0.01), while the cellular Rh123 accumulation among three groups were significantly lower than that in group transfected with empty vector+saline (P<0.01). Conclusions: The expression of NF-κB may contributes to the paclitaxel resistance to ovarian cancer. HB-EGF may induce the paclitaxel resistance of ovarian cancer by the regulation of EGFR/NF-κB/P-gp pathway.
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Affiliation(s)
- X H Tang
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
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Tang XH, Lu MS, Deng S, Li M. [Reverse of the resistance to paclitaxel of the heparin binding-epidermal growth factor-like growth factor inhibitor in ovarian cancer]. Zhonghua Fu Chan Ke Za Zhi 2017; 52:110-115. [PMID: 28253574 DOI: 10.3760/cma.j.issn.0529-567x.2017.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect and mechanism of CRM197, the heparin binding-epidermal growth factor-like growth factor (HB-EGF) inhibitor, on the reverse of the resistance of ovarian cancer to paclitaxel. Methods: (1)The effect of CRM197 on the 50% inhibitory concentrations (IC(50)) of human ovarian carcinoma cell line A2780 and paclitaxel-resistant ovarian carcinoma cell line A2780/Taxol was tested by methyl thiazolyl tetrazolium (MTT) assay. Western blot was used to detect the effect of CRM197 on the expression of HB-EGF, epidermal growth factor receptor (EGFR) and plasma membrane glycoprotein (P-gp) protein in A2780 and A2780/Taxol cells. Real-time PCR was used to examine the MDR1 mRNA expression in these cells. (2) A2780/Taxol cells were divided into 4 groups, including the cells transfected with empty vector and saline treatment (empty vector group), MDR1 small interference RNA (siRNA) vector and saline treatment (MDR1 siRNA group), empty vector and CRM197 treatment (empty vector+CRM197 group) and MDR1 siRNA vector and CRM197 treatment (MDR1 siRNA+CRM197 group), respectively. Flow cytometry was used to detecte the effect of intracellular rhodomine 123 (Rh123) accumulation, and caspase-3 activity assay was used to test the effect of apoptosis in four groups of A2780/Taxol cells. (3) In experiments in vivo, A2780/Taxol cells were inoculated to nude mouse subcutaneously to determine the EGFR and P-gp protein expression following CRM197 treatment by immunohistochemistry. Results: (1) In vitro, MTT examination showed that the IC(50) of A2780/Taxol cells to paclitaxel in A2780/Taxol+CRM197 group [(6.4±0.3) μmol/L] was significantly lower than the IC(50) in A2780/Taxol group [ (34.1±0.5) μmol/L, P<0.01], and the reveral fold of CRM197 was 5.3. The expression level of HB-EGF protein in A2780/Taxol+CRM197 group (1.44±0.29) was significantly lower than HB-EGF protein in A2780/Taxol group (2.72±0.32), respectively (P<0.05). The expression level of EGFR protein (0.71±0.25) and P-gp protein (0.82±0.19) in A2780/Taxol+CRM197 group was significantly lower than EGFR protein (1.87±0.31) and P-gp protein (1.84±0.27) of A2780/Taxol group (P<0.05). Compared with A2780/Taxol group (1.78±0.27) , MDR1 mRNA was significantly down-regulated in A2780/Taxol+CRM197 group (0.79±0.13, P<0.05). (2) The fluorescence intensity of Rh123 of the A2780/Taxol cells in empty vector group, MDR1 siRNA group,empty vector+CRM197 group, MDR1 siRNA+CRM197 group was 33.4±1.6, 56.3±3.3, 43.5±3.1,100.4±7.4, and the pNA of the A2780/Taxol cells was (11.4±1.2) , (52.8±0.9) , (71.2±3.6) , (82.7±3.8) μmol/L. The expression levels in MDR1 siRNA+CRM197 group were both higher than the expression levels in empty vector+CRM197 group, and the expression levels in empty vector+CRM197 group, MDR1 siRNA group were both higher than the expression levels in empty vector group (P<0.05). (3) In vivo, the expression scores of EGFR protein in A2780/Taxol+CRM197 tumors (4.4±1.4) were lower than that in A2780/Taxol tumors (10.2±3.1, P<0.05). The expression scores of P-gp protein in A2780/Taxol+CRM197 tumors (3.8±1.1) were lower than that in A2780/Taxol tumors (8.8±2.7, P<0.05). Conclusion: CRM197 reverses the resistance of ovarian cancer to paclitaxel by increasing caspase-3 activity to advance apoptosis via EGFR/MDR1/P-gp pathway.
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Affiliation(s)
- X H Tang
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
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Arisaka Y, Kobayashi J, Ohashi K, Tatsumi K, Kim K, Akiyama Y, Yamato M, Okano T. A heparin-modified thermoresponsive surface with heparin-binding epidermal growth factor-like growth factor for maintaining hepatic functions in vitro and harvesting hepatocyte sheets. Regen Ther 2016; 3:97-106. [PMID: 31245479 PMCID: PMC6581876 DOI: 10.1016/j.reth.2016.03.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/08/2016] [Accepted: 03/08/2016] [Indexed: 01/21/2023] Open
Abstract
A heparin-modified thermoresponsive surface bound with heparin-binding epidermal growth factor-like growth factor (HB-EGF) was designed to allow creation of transferrable and functional hepatocyte sheets. A heparin-modified thermoresponsive surface was prepared by covalently tethering heparin onto poly(N-isopropylacrylamide-co-2-carboxyisopropylacrylamide)-grafted tissue culture polystyrene surfaces (Heparin-IC). HB-EGFs were able to stably bind to heparin-IC via affinity interaction. The survival of primary rat hepatocytes was maintained through HB-EGF-bound heparin-IC (HB-EGF/heparin-IC). Moreover, cultured rat primary hepatocytes on HB-EGF/heparin-IC exhibited higher albumin-secretion than hepatocytes cultured on PIPAAm-grafted and collagen-coated surfaces with soluble HB-EGF in the culture medium, regardless of whether soluble EGF was added. These results suggested that HB-EGF/heparin-IC is able to effectively maintain hepatic function via continuous signaling of HB-EGF. After a 4-day cultivation, the cultured hepatocytes on HB-EGF/heparin-IC detached as a cell sheet with fibronectin and HB-EGF only after the temperature was lowered to 20 °C. In addition, higher expression of hepatocyte-specific genes (albumin, hepatocyte nuclear factor 4 alpha, coagulation factor VII, and coagulation factor IX) in hepatocyte sheets was detected on HB-EGF/heparin-IC than on a PIPAAm surface with soluble HB-EGF, indicating that HB-EGF/heparin-IC suppressed the dedifferentiation of cultured hepatocytes. Hence, heparin-modified thermoresponsive surfaces bound with HB-EGF facilitate the fabrication of transferrable hepatocyte sheets with intact hepatic functions and have the potential to provide an in vitro culture system using functional hepatocyte sheet tissues, which may serve as an effective hepatocyte-based tissue engineering platform for liver disease treatments.
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Key Words
- Alb, albumin
- CIPAAm, 2-carboxyisopropylacrylamide
- DMEM, Dulbecco's modified Eagle's medium
- ECM, extracellular matrix
- EDC, 1-ethyl-3-(3-dimetylaminopropyl)-carbodiimide hydrochloride
- EDTA, trypsin/ethylenediaminetetraacetic acid
- EGF, epidermal growth factor
- ELISA, enzyme-linked immunosorbent assay
- F7, coagulation factor VII
- F9, coagulation factor IX
- FBS, fetal bovine serum
- HB-EGF, heparin-binding EGF-like growth factor
- HB-EGFX/heparin-IC, HB-EGF-bound heparin-IC
- Heparin
- Heparin-binding EGF-like growth factor
- Hepatocyte sheet
- Hnf4α, hepatocyte nuclear factor 4 alpha
- IC, poly(N-isopropylacrylamide-co-2-carboxyisopropylacrylamide) on TCPS
- IPAAm, N-isopropylacrylamide
- MES, morpholinoethanesulfonic acid monohydrate
- NHS, N-hydroxysuccinimide
- PBS, Dulbecco's phosphate buffered saline
- PIPAAm, poly(N-isopropylacrylamide) on TCPS
- PIPAAm + HB-EGFY, PIPAAm with soluble HB-EGF
- Poly(N-isopropylacrylamide)
- RT-PCR, reverse transcription polymerase chain reaction
- TCPS, tissue culture polystyrene dishe
- Thermoresponsive cell culture surface
- bFGF, basic fibroblast growth factor
- heparin-IC, heparin-modified IC
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Affiliation(s)
| | - Jun Kobayashi
- Institute of Advanced Biomedical Engineering and Science and Global Center of Excellence (COE) Program, Tokyo Women's Medical University (TWIns), 8-1 Kawadacho, Shinjuku-ku, Tokyo 162-8666, Japan
| | | | | | | | | | | | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science and Global Center of Excellence (COE) Program, Tokyo Women's Medical University (TWIns), 8-1 Kawadacho, Shinjuku-ku, Tokyo 162-8666, Japan
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Luo S, Liu X, Zheng Y, Xu W, Ni H, Li Y, Liu Q. Interleukin-22 upregulates HB-EGF expression in HaCaT cells via JAK2/STAT3 and ERK1/2 signalling. Exp Dermatol 2015; 24:713-4. [PMID: 25939532 DOI: 10.1111/exd.12736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2015] [Indexed: 12/01/2022]
Affiliation(s)
- Suju Luo
- Department of Dermatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Xinxin Liu
- Department of Dermatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yan Zheng
- Department of Dermatology, Second Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Wenjuan Xu
- Department of Dermatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Haiyang Ni
- Department of Dermatology, Tianjin Academy of Traditional Chinese Medicine Affiliated Hospital, Tianjin, China
| | - Yan Li
- Department of Dermatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Quanzhong Liu
- Department of Dermatology, Tianjin Medical University General Hospital, Tianjin, China
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Abstract
PURPOSE To determine whether levels of nerve growth factor (NGF) and heparin-binding epidermal growth factor-like growth factor (HB-EGF) can be used to objectively assess overactive bladder syndrome (OAB) treatment outcome and to evaluate the effects of fixed-dose fesoterodine on OAB symptoms. MATERIALS AND METHODS This study included 124 participants (62 patients with OAB and 62 controls) in Severance Hospital between 2010 and 2012. In patients with OAB, 4 mg fesoterodine was administered once daily. Repeated evaluations of putative biomarker levels, urine creatinine (Cr) levels, and questionnaire responses, including the Overactive Bladder Symptom Score (OABSS) and the Overactive Bladder Questionnaire (OAB q), were performed from baseline to 16 weeks. RESULTS Urinary levels of NGF/Cr (OAB: 1.13±0.9 pg/mg; control: 0.5±0.29 pg/mg) and HB-EGF/Cr (OAB: 8.73±6.55 pg/mg; control: 4.45±2.93 pg/mg) were significantly higher in subjects with OAB than in controls (p<0.001). After 16 weeks of fixed-dose fesoterodine treatment, urinary NGF/Cr levels (baseline: 1.13±0.08 pg/mg; 16 weeks: 0.60±0.4 pg/mg; p=0.02) and HB-EGF/Cr levels significantly decreased (baseline: 8.73±6.55 pg/mg; 16 weeks: 4.72±2.69 pg/mg; p=0.03, respectively). Both the OABSS and OAB q scores improved (p<0.001). However, there were no a statistically significant correlations between these urinary markers and symptomatic scores. CONCLUSION Urinary levels of NGF and HB-EGF may be potential biomarkers for evaluating outcome of OAB treatment. Fixed-dose fesoterodine improved OAB symptoms. Future studies are needed to further examine the significance of urinary NGF and HB-EGF levels as therapeutic markers for OAB.
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Affiliation(s)
- Soo Rim Kim
- Department of Obstetrics and Gynecology, International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
| | - Yeo Jung Moon
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Sei Kwang Kim
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Sang Wook Bai
- Department of Obstetrics and Gynecology, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Korea.
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Watkins DJ, Zhou Y, Matthews MAB, Chen L, Besner GE. HB-EGF augments the ability of mesenchymal stem cells to attenuate intestinal injury. J Pediatr Surg 2014; 49:938-44; discussion 944. [PMID: 24888839 PMCID: PMC4044538 DOI: 10.1016/j.jpedsurg.2014.01.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 01/27/2014] [Indexed: 12/15/2022]
Abstract
BACKGROUND We have previously demonstrated that heparin-binding EGF-like growth factor (HB-EGF) and mesenchymal stem cell (MSC) administration protect the intestines from ischemia/reperfusion (I/R) injury in vivo, with amniotic fluid-derived MSC (AF-MSC) being more efficacious than bone marrow-derived MSC (BM-MSC). The goal of the current study was to determine whether the protective effects of HB-EGF were from direct effects on MSC or via alternative mechanisms. METHODS Murine MSC were transfected with an HB-EGF plasmid or control plasmid by electroporation. Mice were subjected to segmental intestinal I/R injury and received either BM-MSC or AF-MSC either with or without exogenous HB-EGF, or BM-MSC or AF-MSC that endogenously over-expressed HB-EGF. MSC engraftment, intestinal histologic injury, and intestinal permeability were quantified. RESULTS There was increased MSC engraftment into injured compared to uninjured intestine. HB-EGF increased AF-MSC engraftment into injured intestine. Administration of HB-EGF and MSC improved intestinal histology and intestinal permeability after I/R injury, with AF-MSC being most efficacious. The effect of HB-EGF on MSC was similar when the growth factor was administered exogenously, or when it was overexpressed endogenously. CONCLUSIONS The effect of HB-EGF on AF-MSC was similar with both exogenous administration and endogenous overexpression of the growth factor, implying that HB-EGF has a direct effect on AF-MSC. This information may assist in guiding potential future AF-MSC-based therapies for patients at risk of intestinal ischemic injuries.
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Affiliation(s)
- Daniel J Watkins
- The Research Institute at Nationwide Children's Hospital, Center for Perinatal Research, Department of Pediatric Surgery, Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, Ohio
| | - Yu Zhou
- The Research Institute at Nationwide Children's Hospital, Center for Perinatal Research, Department of Pediatric Surgery, Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, Ohio
| | - Mika A B Matthews
- The Research Institute at Nationwide Children's Hospital, Center for Perinatal Research, Department of Pediatric Surgery, Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, Ohio
| | - Li Chen
- The Research Institute at Nationwide Children's Hospital, Center for Perinatal Research, Department of Pediatric Surgery, Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, Ohio
| | - Gail E Besner
- The Research Institute at Nationwide Children's Hospital, Center for Perinatal Research, Department of Pediatric Surgery, Nationwide Children's Hospital, and The Ohio State University College of Medicine, Columbus, Ohio.
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Takemura T, Yoshida Y, Kiso S, Kizu T, Furuta K, Ezaki H, Hamano M, Egawa M, Chatani N, Kamada Y, Imai Y, Higashiyama S, Iwamoto R, Mekada E, Takehara T. Conditional loss of heparin-binding EGF-like growth factor results in enhanced liver fibrosis after bile duct ligation in mice. Biochem Biophys Res Commun 2013; 437:185-91. [PMID: 23743191 DOI: 10.1016/j.bbrc.2013.05.097] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 05/23/2013] [Indexed: 12/23/2022]
Abstract
Our aims were to evaluate the involvement of heparin-binding EGF-like growth factor (HB-EGF) in liver fibrogenesis of humans and mice and to elucidate the effect of HB-EGF deficiency on cholestatic liver fibrosis using conditional HB-EGF knockout (KO) mice. We first demonstrated that gene expression of HB-EGF had a positive significant correlation with that of collagen in human fibrotic livers, and was increased in bile duct ligation (BDL)-induced fibrotic livers in mouse. We then generated conditional HB-EGF knockout (KO) mice using the interferon inducible Mx-1 promoter driven Cre recombinase transgene and wild type (WT) and KO mice were subjected to BDL. After BDL, KO mice exhibited enhanced liver fibrosis with increased expression of collagen, compared with WT mice. Finally, we used mouse hepatic stellate cells (HSCs) to examine the role of HB-EGF in the activation of these cells and showed that HB-EGF antagonized TGF-β-induced gene expression of collagen in mouse primary HSCs. Interestingly, HB-EGF did not prevent the TGF-β-induced nuclear accumulation of Smad3, but did lead to stabilization of the Smad transcriptional co-repressor TG-interacting factor. In conclusion, our data suggest a possible protective role of HB-EGF in cholestatic liver fibrosis.
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Affiliation(s)
- Takayo Takemura
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Osaka, Japan
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Watkins DJ, Yang J, Matthews MAB, Besner GE. Synergistic effects of HB-EGF and mesenchymal stem cells in a murine model of intestinal ischemia/reperfusion injury. J Pediatr Surg 2013; 48:1323-9. [PMID: 23845626 PMCID: PMC3710437 DOI: 10.1016/j.jpedsurg.2013.03.032] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 03/08/2013] [Indexed: 12/29/2022]
Abstract
BACKGROUND We have previously demonstrated that heparin-binding EGF-like growth factor (HB-EGF) administration protects the intestines from ischemia/reperfusion (I/R) injury in vivo. We have also shown that HB-EGF promotes mesenchymal stem cell (MSC) proliferation and migration in vitro. The goals of the current study were to examine the effects of HB-EGF and both bone marrow (BM)- and amniotic fluid (AF)-derived MSC on intestinal I/R injury in vivo. MATERIALS AND METHODS MSC were isolated from pan-EGFP mice, expanded, and purified. Pluripotency was confirmed by induced differentiation. Mice were subjected to terminal ileum I/R and received either: (1) no therapy; (2) HB-EGF; (3) BM-MSC; (4) HB-EGF+BM-MSC; (5) AF-MSC; or (6) HB-EGF+AF-MSC. MSC engraftment, histologic injury, and intestinal permeability were quantified. RESULTS There was increased MSC engraftment into injured compared to uninjured intestine for all experimental groups, with significantly increased engraftment for AF-MSC+HB-EGF compared to AF-MSC alone. Administration of HB-EGF and MSC improved intestinal histology and intestinal permeability after I/R injury. The greatest improvement was with combined administration of HB-EGF+AF-MSC. CONCLUSIONS Both HB-EGF alone and MSC alone can protect the intestines from I/R injury, with synergistic efficacy occurring when HB-EGF and AF-MSC are administered together.
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Affiliation(s)
- Daniel J Watkins
- The Research Institute at Nationwide Children's Hospital, Center for Perinatal Research, Columbus, OH 43205, USA
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