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Kovács MG, Kovács ZZA, Varga Z, Szűcs G, Freiwan M, Farkas K, Kővári B, Cserni G, Kriston A, Kovács F, Horváth P, Földesi I, Csont T, Kahán Z, Sárközy M. Investigation of the Antihypertrophic and Antifibrotic Effects of Losartan in a Rat Model of Radiation-Induced Heart Disease. Int J Mol Sci 2021; 22:12963. [PMID: 34884782 PMCID: PMC8657420 DOI: 10.3390/ijms222312963] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 12/27/2022] Open
Abstract
Radiation-induced heart disease (RIHD) is a potential late side-effect of thoracic radiotherapy resulting in left ventricular hypertrophy (LVH) and fibrosis due to a complex pathomechanism leading to heart failure. Angiotensin-II receptor blockers (ARBs), including losartan, are frequently used to control heart failure of various etiologies. Preclinical evidence is lacking on the anti-remodeling effects of ARBs in RIHD, while the results of clinical studies are controversial. We aimed at investigating the effects of losartan in a rat model of RIHD. Male Sprague-Dawley rats were studied in three groups: (1) control, (2) radiotherapy (RT) only, (3) RT treated with losartan (per os 10 mg/kg/day), and were followed for 1, 3, or 15 weeks. At 15 weeks post-irradiation, losartan alleviated the echocardiographic and histological signs of LVH and fibrosis and reduced the overexpression of chymase, connective tissue growth factor, and transforming growth factor-beta in the myocardium measured by qPCR; likewise, the level of the SMAD2/3 protein determined by Western blot decreased. In both RT groups, the pro-survival phospho-AKT/AKT and the phospho-ERK1,2/ERK1,2 ratios were increased at week 15. The antiremodeling effects of losartan seem to be associated with the repression of chymase and several elements of the TGF-β/SMAD signaling pathway in our RIHD model.
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Affiliation(s)
- Mónika Gabriella Kovács
- Interdisciplinary Center of Excellence and MEDICS Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (M.G.K.); (Z.Z.A.K.); (G.S.); (M.F.)
| | - Zsuzsanna Z. A. Kovács
- Interdisciplinary Center of Excellence and MEDICS Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (M.G.K.); (Z.Z.A.K.); (G.S.); (M.F.)
| | - Zoltán Varga
- Department of Oncotherapy, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (Z.V.); (Z.K.)
| | - Gergő Szűcs
- Interdisciplinary Center of Excellence and MEDICS Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (M.G.K.); (Z.Z.A.K.); (G.S.); (M.F.)
| | - Marah Freiwan
- Interdisciplinary Center of Excellence and MEDICS Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (M.G.K.); (Z.Z.A.K.); (G.S.); (M.F.)
| | - Katalin Farkas
- Department of Laboratory Medicine, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (K.F.); (I.F.)
| | - Bence Kővári
- Department of Pathology, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (B.K.); (G.C.)
| | - Gábor Cserni
- Department of Pathology, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (B.K.); (G.C.)
| | - András Kriston
- Synthetic and Systems Biology Unit, Biological Research Centre, Eötvös Loránd Research Network, H-6726 Szeged, Hungary; (A.K.); (F.K.); (P.H.)
- Single-Cell Technologies Ltd., H-6726 Szeged, Hungary
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, FIN-00014 Helsinki, Finland
| | - Ferenc Kovács
- Synthetic and Systems Biology Unit, Biological Research Centre, Eötvös Loránd Research Network, H-6726 Szeged, Hungary; (A.K.); (F.K.); (P.H.)
- Single-Cell Technologies Ltd., H-6726 Szeged, Hungary
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, FIN-00014 Helsinki, Finland
| | - Péter Horváth
- Synthetic and Systems Biology Unit, Biological Research Centre, Eötvös Loránd Research Network, H-6726 Szeged, Hungary; (A.K.); (F.K.); (P.H.)
- Single-Cell Technologies Ltd., H-6726 Szeged, Hungary
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, FIN-00014 Helsinki, Finland
| | - Imre Földesi
- Department of Laboratory Medicine, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (K.F.); (I.F.)
| | - Tamás Csont
- Interdisciplinary Center of Excellence and MEDICS Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (M.G.K.); (Z.Z.A.K.); (G.S.); (M.F.)
| | - Zsuzsanna Kahán
- Department of Oncotherapy, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (Z.V.); (Z.K.)
| | - Márta Sárközy
- Interdisciplinary Center of Excellence and MEDICS Research Group, Department of Biochemistry, Albert Szent-Györgyi Medical School, University of Szeged, H-6720 Szeged, Hungary; (M.G.K.); (Z.Z.A.K.); (G.S.); (M.F.)
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Zha M, Ren XB, Chen J, Fang Y, Yu P, Liu YY, Wang G, Luo J, Yang J, Gou TW. Adipocytokine expression, platelet-to-lymphocyte ratio and TGF- β1/Smad signaling activity in diabetic patients complicated with pulmonary infection. J Int Med Res 2020; 48:300060520926006. [PMID: 32567428 PMCID: PMC7309391 DOI: 10.1177/0300060520926006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 04/20/2020] [Indexed: 12/04/2022] Open
Abstract
OBJECTIVE To investigate adipocytokine expression levels, platelet-to-lymphocyte ratio (PLR) and transforming growth factor (TGF)-β1/Smad signaling activity in diabetic patients with pulmonary infection. METHODS Eighty-two type 2 diabetic patients with pulmonary infection were included in the observation group and 75 patients with simple type 2 diabetes were recruited into the control group. The fasting blood glucose (FBG), glycated hemoglobin (HbA1c), and PLR in the two groups were compared. Complement-C1q/tumor necrosis factor related protein 3 (CTRP-3), complement-C1q/tumor necrosis factor related protein 9 (CTRP-9), leptin, adiponectin, and TGF-β1/Smad signaling pathway activity in peripheral blood mononuclear cells (PBMCs) was detected. RESULTS Compared with patients in the control group, patients in the observation group presented with increased levels of FGB, HbA1c, and leptin, an increase in the PLR, and decreased serum CTRP-3, CTRP-9, and adiponectin levels. TGF-β1, p-Smad2, and p-Smad3 protein expression levels were up-regulated in PBMCs from patients in the observation group compared with the control group. CONCLUSIONS These results show that in type 2 diabetic patients with pulmonary infection, adipocytokine expression is altered, PLR is disturbed, and the TGF-β1/Smad signaling pathways in PBMCs are significantly activated.
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Affiliation(s)
- Mei Zha
- Department of Infection Management, The People’s Hospital of Jianyang City, Chengdu, Sichuan Province, China
| | - Xiao-Bing Ren
- Department of Infection Management, The People’s Hospital of Jianyang City, Chengdu, Sichuan Province, China
| | - Jing Chen
- Department of Gastroenterology, Medical Centre of Dujiangyan City, Chengdu, Sichuan Province, China
| | - Ying Fang
- Department of Infection Management, The People’s Hospital of Jianyang City, Chengdu, Sichuan Province, China
| | - Ping Yu
- Department of Endocrinology, The People’s Hospital of Jianyang City, Chengdu, Sichuan Province, China
| | - Yan-Yin Liu
- Department of Infection Management, Sichuan Provincial Fourth People’s Hospital, Chengdu, Sichuan Province, China
| | - Gang Wang
- Department of Central Laboratory, The People’s Hospital of Jianyang City, Chengdu, Sichuan Province, China
| | - Jun Luo
- Department of Laboratory Medicine, Chengdu Second People’s Hospital, Chengdu, Sichuan Province, China
| | - Jing Yang
- Institute of Liver Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei Province, China
| | - Ting-Wei Gou
- Department of Infection Management, The People’s Hospital of Jianyang City, Chengdu, Sichuan Province, China
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Li L, Guo Y, Zhao Y, Wei J, Jin Y. Effect of astragaloside IV on cognitive dysfunction in rats with cerebrally infarcted via TGF-β / Smad signaling pathway. Cell Mol Biol (Noisy-le-grand) 2020; 66:87-92. [PMID: 32415932] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/03/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023]
Abstract
Cerebral infarction is an acute cerebrovascular disease caused by abnormal blood circulation in the brain. In the present study, we investigate the effect of astragaloside IV on cognitive dysfunction in cerebrally infarcted rats via transforming growth factor-β (TGF-β) / Smad signaling pathway. For this purpose, 45 rats were divided into three groups including astragaloside, model, and control. 30 of 45 healthy adult male SD rats were randomly selected to establish an acute cerebral infarction model. 15 modeled rats were enrolled as a model and astragaloside group, and another 15 rats as a blank control group. The rats in the astragaloside group were fed with astragaloside IV according to 1.08 g/kg body weight, and those in the blank group and model group were given matching normal saline. The levels of TGF-β, Smad1, Smad3 and Smad7 of TGF-β/Smad signaling transduction pathway at T0 (week 0), T1 (week 3) and T2 (week 6) were determined by enzyme-linked immunosorbent assay (ELISA). The modified neurological severity score (mNSS) was used to evaluate the improvement of cognitive dysfunction in rats. The mNSS of rats with cerebral infarction in the astragaloside group was lower than that in the control group and model group (P< 0.05). While the levels of TGF-β, Smad1, Smad3 and Smad7 in the astragaloside group were higher than those in the control group and model group (P< 0.05). Astragaloside IV plays an important role in improving cognitive dysfunction in rats with cerebral infarction while affecting the levels of TGF-β, Smad1, Smad3 and Smad7 and activating TGF-β / Smad signaling pathway.
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Affiliation(s)
- Li Li
- Department of Encephalopathy, Jinan Municipal No.2 Hospital of Traditional Chinese Medicine, Jinan 250200, China
| | - Yanling Guo
- Department of Encephalopathy, Jinan Municipal No.2 Hospital of Traditional Chinese Medicine, Jinan 250200, China
| | - Yan'an Zhao
- Department of Encephalopathy, Jinan Municipal No.2 Hospital of Traditional Chinese Medicine, Jinan 250200, China
| | - Jiahong Wei
- Department of Encephalopathy, Jinan Municipal No.2 Hospital of Traditional Chinese Medicine, Jinan 250200, China
| | - Yuanyuan Jin
- Department of Encephalopathy, Jinan Municipal No.2 Hospital of Traditional Chinese Medicine, Jinan 250200, China
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Jia HL, Liu J. Investigation into the correlations of expressions of Cav-3 and Smad3 with pathogenesis and prognosis of viral myocarditis. Eur Rev Med Pharmacol Sci 2017; 21:3262-3269. [PMID: 28770956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To investigate the correlations of expressions of Caveolae-3 (Cav-3) and sma and mad homologue (Smad3) with the pathogenesis and prognosis of viral myocarditis (VMC). MATERIALS AND METHODS VMC animal models were prepared and divided into the control group, the virus group and the Shenmai group. We detected the levels of creatine kinase isoenzyme (CK-MB) in the serum that was associated with the myocardial injuries, investigated the pathological features of VMC in BALB/C mice via hematoxylin-eosin (HE) staining, measured the mRNA expressions of Cav-3 and Smad3 via Real-time polymerase chain reaction (RT-PCR) and determined the protein expressions of Cav-3 and Smad3 through Western blotting method. RESULTS The expressions of CK-MB in the virus group and Shenmai group were significantly higher than those in the control group; in comparison with the virus group, obvious improvement was identified in the pathologic condition of the Shenmai group; also, there was a statistically significant difference in comparison of the pathologic scores of BALB/C mice between the Shenmai group and the virus group. The mRNA expressions of Cav-3 and Smad3 in the virus group and Shenmai group were significantly higher than those in the control group, and the differences had statistical significance; however, higher mRNA expressions were identified in the virus group. Besides, protein expressions of Cav-3 and Smad3 in the virus group and Shenmai group were remarkably higher than those in the control group with statistically significant differences, but those in the virus group were much higher. CONCLUSIONS Cav-3 and Smad3 may be involved in the occurrence and development of VMC, which provides some theoretical evidence for further research into the pathogenesis of VMC and the development of clinical drugs for treatment of VMC.
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Affiliation(s)
- H-L Jia
- Department of Pediatrics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China.
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Qi Y, Wang CC, He YL, Zou H, Liu CX, Pang LJ, Hu JM, Jiang JF, Zhang WJ, Li F. The correlation between morphology and the expression of TGF-β signaling pathway proteins and epithelial-mesenchymal transition-related proteins in synovial sarcomas. Int J Clin Exp Pathol 2013; 6:2787-2799. [PMID: 24294365 PMCID: PMC3843259] [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] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Accepted: 10/31/2013] [Indexed: 06/02/2023]
Abstract
Synovial sarcoma (SS) is a malignant tumor of soft tissue and is noted for late local recurrence and metastasis. Aberrant epithelial-mesenchymal transition (EMT) has been implicated in the pathogenesis of diverse human malignancies. Immunohistochemical techniques were used to assess EMT-related proteins (E-cadherin, N-cadherin, β-catenin, Snail, and Slug) and the TGF-β1 pathway (TGF-β1 and Smad2/3) proteins expression in different histological subtypes and epithelial mesenchymal compositions of SS. The expression of cell-surface (E-cadherin) and cytoskeletal proteins (β-catenin) were higher significantly in biphasic SSs (BSSs) (70.4%, 51.9%) than MFSSs (both for 10%). Among monophasic fibrous SSs (MFSSs) samples, E-cadherin protein expression was negatively correlated with expression Snail, Slug, TGF-β1, and Smad2/3. The expression levels of Snail and Smad2/3 were correlated with the pTNM stage (I-II vs. III-IV; P=0.047, P=0.021) and TGF-β1 exhibited a tendency toward a positive correlation with pTNM stage (I-II vs. III-IV; P=0.052), but did not correlate with the histological grade (p>0.05). Interestingly, our data showed that expression of E-cadherin protein correlated with greater survival in SS patients. Overexpression of Snail, and TGF-β1 is associated with suppressed expression of E-cadherin in MFSSs, which supports the hypothesis that the MFSS subtype may have developed via neoplastic EMT.
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Affiliation(s)
- Yan Qi
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
- Department of Oncology, Tongji Hospital, Tongji Medical College of Huazhong University of Science and TechnologyWuhan, Hubei, China
| | - Cui-Cui Wang
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Yong-Lai He
- Department of ICU Intensive Care, The First Affiliated Hospital Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Hong Zou
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Chun-Xia Liu
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Li-Juan Pang
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Jian-Ming Hu
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Jin-fang Jiang
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Wen-Jie Zhang
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
| | - Feng Li
- Department of Pathology, Shihezi University School of MedicineShihezi, Xinjiang, China
- Department of Oncology, Tongji Hospital, Tongji Medical College of Huazhong University of Science and TechnologyWuhan, Hubei, China
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Kim MK, Maeng YI, Sung WJ, Oh HK, Park JB, Yoon GS, Cho CH, Park KK. The differential expression of TGF-β1, ILK and wnt signaling inducing epithelial to mesenchymal transition in human renal fibrogenesis: an immunohistochemical study. Int J Clin Exp Pathol 2013; 6:1747-1758. [PMID: 24040439 PMCID: PMC3759481] [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] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 08/10/2013] [Indexed: 06/02/2023]
Abstract
Epithelial-to-mesenchymal transition (EMT) is a process for fully differentiated epithelial cells to undergo a phenotypic change to fibroblasts via diverse intracellular signaling pathways. While the pivotal role of fibroblasts in renal fibrosis is widely accepted, their origin remains undefined. In addition, although a large number of studies have provided evidence of EMT in human kidney diseases, specific signaling pathways leading to EMT have not yet been discovered in humans. To evaluate the origin of interstitial fibroblasts and signaling pathways involved in the EMT process, we analyzed the differential expression of EMT-related molecules in paraffin-fixed sections from 19 human fibrotic kidneys and 4 control kidneys. In human fibrotic kidneys, tubular epithelial cells (TECs) with intact tubular basement membrane (TBM) showed loss or down-regulation of an epithelial marker (E-cadherin), de novo expression of mesenchymal markers (vimentin and fibronectin), and significant up-regulation of inducers and mediators controlling the EMT process (transforming growth factor-β1 (TGF-β1), p-Smad2/3, β1-integrin, p38 mitogen-activated protein kinase (MAPK), WNT5B and β-catenin) in the areas of interstitial inflammation and fibrosis, compared with their expression in control kidneys. In conclusion, the type II EMT process in humans is thought to be an adaptive response of TECs to chronic injury and is regulated by interconnections of TGF-β/Smad, integrin/integrin-linked kinase (ILK) and wnt/β-catenin signaling pathways.
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Affiliation(s)
- Min-Kyung Kim
- Department of Pathology, Catholic University of Daegu School of MedicineRepublic of Korea
| | - Young-In Maeng
- Department of Pathology, Catholic University of Daegu School of MedicineRepublic of Korea
| | - Woo Jung Sung
- Department of Pathology, Catholic University of Daegu School of MedicineRepublic of Korea
| | - Hoon-Kyu Oh
- Department of Pathology, Catholic University of Daegu School of MedicineRepublic of Korea
| | - Jae-Bok Park
- Department of Pathology, Catholic University of Daegu School of MedicineRepublic of Korea
| | - Ghil Suk Yoon
- Department of Pathology, Kyungpook National University School of MedicineDaegu, Republic of Korea
| | - Chang-Ho Cho
- Department of Pathology, Catholic University of Daegu School of MedicineRepublic of Korea
| | - Kwan-Kyu Park
- Department of Pathology, Catholic University of Daegu School of MedicineRepublic of Korea
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Wang M, Saha J, Hada M, Anderson JA, Pluth JM, O’Neill P, Cucinotta FA. Novel Smad proteins localize to IR-induced double-strand breaks: interplay between TGFβ and ATM pathways. Nucleic Acids Res 2013; 41:933-42. [PMID: 23221633 PMCID: PMC3553971 DOI: 10.1093/nar/gks1038] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 10/01/2012] [Accepted: 10/06/2012] [Indexed: 01/03/2023] Open
Abstract
Cellular damage from ionizing radiation (IR) is in part due to DNA damage and reactive oxygen species, which activate DNA damage response (DDR) and cytokine signaling pathways, including the ataxia telangiectasia mutated (ATM) and transforming growth factor (TGF)β/Smad pathways. Using classic double-strand breaks (DSBs) markers, we studied the roles of Smad proteins in DDR and the crosstalk between TGFβ and ATM pathways. We observed co-localization of phospho-Smad2 (pSmad2) and Smad7 with DSB repair proteins following low and high linear energy transfer (LET) radiation in human fibroblasts and epithelial cells. The decays of both foci were similar to that of γH2AX foci. Irradiation with high LET particles induced pSmad2 and Smad7 foci tracks indicating the particle trajectory through cells. pSmad2 foci were absent in S phase cells, while Smad7 foci were present in all phases of cell cycle. pSmad2 (but not Smad7) foci were completely abolished when ATM was depleted or inactivated. In contrast, a TGFβ receptor 1 (TGFβR1) inhibitor abrogated Smad7, but not pSmad2 foci at DSBs sites. In summary, we suggest that Smad2 and Smad7 contribute to IR-induced DSB signaling in an ATM or TGFβR1-dependent manner, respectively.
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Affiliation(s)
- Minli Wang
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Janapriya Saha
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Megumi Hada
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Jennifer A. Anderson
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Janice M. Pluth
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Peter O’Neill
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Francis A. Cucinotta
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
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Wu Y, Li Q, Zhou X, Yu J, Mu Y, Munker S, Xu C, Shen Z, Müllenbach R, Liu Y, Li L, Gretz N, Zieker D, Li J, Matsuzaki K, Li Y, Dooley S, Weng H. Decreased levels of active SMAD2 correlate with poor prognosis in gastric cancer. PLoS One 2012; 7:e35684. [PMID: 22539990 PMCID: PMC3334357 DOI: 10.1371/journal.pone.0035684] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Accepted: 03/20/2012] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND TGF-β plays a dual role in the progression of human cancer. During the early stages of carcinogenesis, TGF-β functions as a tumor suppressor. During the late stages of tumor development, however, TGF-β can promote tumor growth and metastasis. A shift in Smad2/3 phosphorylation from the carboxy terminus to linker sites is a key event determining biological function of TGF-β in colorectal and hepatocellular carcinoma. In the present study, we investigated the potential role of differential Smad2/3 phosphorylation in gastric adenocarcinoma. METHODOLOGY Immunohistochemical staining with anti-P-Smad2/3C and P-Smad2/3L antibodies was performed on 130 paraffin-embedded gastric adenocarcinoma specimens. The relationship between P-Smad2/3C and P-Smad2/3L immunohistochemical score and clinicopathologic characteristics of patients was analyzed. Real time PCR was used to measure mRNA expression of Smad2 and Smad3 in cancer and surrounding non-tumor tissue. PRINCIPAL FINDINGS No significant P-Smad2L and/or P-Smad3L positive staining was detected in the majority of specimens (positive staining in 18/130 samples). Positive P-Smad2/3L staining was not associated with a decrease in carboxyterminal phosphorylation staining. Loss of P-Smad2C remarkably correlated with depth of tumor infiltration and poor differentiation of cancer cells in patients with gastric cancer. No correlation was detectable between P-Smad3C and clinicopathologic characteristics of gastric adenocarcinoma. However, co-staining analysis revealed that P-Smad3C co-localised with α-SMA and collagen I in gastric cancer cells, indicating a potential link between P-Smad3C and epithelial-to-mesenchymal transition of cancer. Real time PCR demonstrated reduced mRNA expression of Smad2 in gastric cancer when compared with surrounding non-tumor tissue in 15/16 patients. CONCLUSIONS Loss of P-Smad2C tightly correlated with cancer invasion and poor differentiation in gastric cancer. Contrary to colorectal and hepatocellular carcinoma, canonical carboxy-terminal phosphorylation, but not linker phosphorylation, of Smad2 is critical for gastric cancer.
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Affiliation(s)
- Yijun Wu
- Department of General Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- * E-mail: (YW); (HW)
| | - Qi Li
- Molecular Hepatology - Alcohol Associated Diseases, II, Medical Clinic Faculty of Medicine at Mannheim, University of Heidelberg, Mannheim, Germany
| | - Xinhui Zhou
- Department of Gynecology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiren Yu
- Department of General Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yunchuan Mu
- Department of General Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Stefan Munker
- Molecular Hepatology - Alcohol Associated Diseases, II, Medical Clinic Faculty of Medicine at Mannheim, University of Heidelberg, Mannheim, Germany
| | - Chengfu Xu
- Department of Gastroenterology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhe Shen
- Department of Gastroenterology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Roman Müllenbach
- Molecular Hepatology - Alcohol Associated Diseases, II, Medical Clinic Faculty of Medicine at Mannheim, University of Heidelberg, Mannheim, Germany
- Department of Medicine II, Saarland University Hospital, Saarland University, Homburg, Germany
| | - Yan Liu
- Molecular Hepatology - Alcohol Associated Diseases, II, Medical Clinic Faculty of Medicine at Mannheim, University of Heidelberg, Mannheim, Germany
| | - Li Li
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Norbert Gretz
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Derek Zieker
- General, Visceral Surgery and Transplantation, University Hospital Tübingen, Tübingen, Germany
| | - Jun Li
- General, Visceral Surgery and Transplantation, University Hospital Tübingen, Tübingen, Germany
| | - Kouichi Matsuzaki
- Departments of Gastroenterology and Hepatology, Kansai Medical University, Osaka, Japan
| | - Youming Li
- Department of Gastroenterology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Steven Dooley
- Molecular Hepatology - Alcohol Associated Diseases, II, Medical Clinic Faculty of Medicine at Mannheim, University of Heidelberg, Mannheim, Germany
| | - Honglei Weng
- Molecular Hepatology - Alcohol Associated Diseases, II, Medical Clinic Faculty of Medicine at Mannheim, University of Heidelberg, Mannheim, Germany
- * E-mail: (YW); (HW)
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9
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Lee SH, Shim HS, Cho SH, Kim SY, Lee SK, Son JY, Jung JY, Kim EY, Lim JE, Lee KJ, Park BH, Kang YA, Kim YS, Kim SK, Chang J, Park MS. Prognostic factors for idiopathic pulmonary fibrosis: clinical, physiologic, pathologic, and molecular aspects. Sarcoidosis Vasc Diffuse Lung Dis 2011; 28:102-112. [PMID: 22117501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Previous studies identified clinical and physiologic factors of idiopathic pulmonary fibrosis (IPF) that are related to an increased risk of mortality. But there are few studies about histologic and molecular approach. OBJECTIVE We investigated whether the C-reactive protein (CRP), fibroblastic foci, phosphorylated Smad2/3 (p-Smad2/3), tumor growth factor-beta (TGF-beta), TGF-beta receptor II (TbetaRII), and the polymorphism of the TGF-beta1 codon 10 are associated with the progression of IPF patients. DESIGN Eighty-six IPF patients who underwent surgical lung biopsies were examined. For each patient, clinical and physiologic parameters were investigated, and we performed immunohistochemical staining for p-Smad2/3 and TbetaRII, and genotyping of the TGF-beta1 codon 10 polymorphism. RESULTS Age at diagnosis, gender, symptom duration, and smoking status did not show a significant association. However, the amount of smoking (p = 0.002), severe reduction in the percentages of predicted forced vital capacity (p = 0.013) and diffusion lung capacity of carbon monoxide (p = 0.023), CRP (p = 0.009) at diagnosis, and fibroblastic foci (p = 0.026) were associated with a poor prognosis. Cellularity, fibrosis, expression level of p-Smad2/3 and TbetaRII, and genotype of the TGF-beta1 codon 10 polymorphism did not have a statistically significant association with the prognosis. CONCLUSION This study confirmed the amount of smoking, abrupt decrease in follow-up pulmonary function parameters, fibroblastic foci, and increased levels of CRP concentration at diagnosis were significantly associated with poor survival. Larger studies are required to confirm all prognostic factors including CRP.
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Affiliation(s)
- S H Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
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10
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Kaji H, Naito J, Inoue Y, Sowa H, Sugimoto T, Chihara K. Statin suppresses apoptosis in osteoblastic cells: role of transforming growth factor-beta-Smad3 pathway. Horm Metab Res 2008; 40:746-51. [PMID: 18622892 DOI: 10.1055/s-0028-1082051] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Statins possess pleiotropic effects in several tissues. Among them, their bone anabolic actions have been recently noted. We have proposed that Smad3, a TGF-beta-signaling molecule, is a promoter of bone formation. However, whether statins would affect TGF-beta-Smad3 pathway in osteoblasts is still unknown. The present study was performed to examine the effects of statin on Smad3 expression and cell apoptosis by employing mouse osteoblastic MC3T3-E1 and rat osteoblastic UMR-106 cells. Statins (pitavastatin, mevastatin, and simvastatin) as well as alendronate increased the levels of Smad3 in MC3T3-E1 cells. The effects of pitavastatin on Smad3 levels were observed from 3 hours and later. Pitavastatin induced the expression of TGF-beta, and cycloheximide, a protein synthesis inhibitor, antagonized the increased levels of pitavastatin on Smad3. On the other hand, pitavastatin antagonized dexamethasone- or etoposide-induced apoptosis in a dose-dependent manner, and Smad3 inactivation by dominant negative Smad3 or an inhibition of endogenous TGF-beta action by SB431542 antagonized anti-apoptotic effects of pitavastatin, indicating that pitavastatin suppressed osteoblast apoptosis partly through TGF-beta-Smad3 pathway. In conclusion, the present study has demonstrated for the first time that statin suppressed cell apoptosis partly through TGF-beta-Smad3 pathway in osteoblastic cells.
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Affiliation(s)
- H Kaji
- Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.
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11
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Filyak Y, Filyak O, Souchelnytskyi S, Stoika R. Doxorubicin inhibits TGF-beta signaling in human lung carcinoma A549 cells. Eur J Pharmacol 2008; 590:67-73. [PMID: 18606404 DOI: 10.1016/j.ejphar.2008.05.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2007] [Revised: 05/05/2008] [Accepted: 05/20/2008] [Indexed: 11/18/2022]
Abstract
Doxorubicin is a DNA-damaging drug, commonly used for treatment of cancer patients. Doxorubicin causes not only cytotoxic and cytostatic effects, but also inhibits metastasis formation, while TGFbeta1 (Transforming Growth Factor-beta1) is a cytokine that is often up-regulated in human cancers and can promote metastasis formation. We have studied the influence of Doxorubicin on TGFbeta signaling in tumor cells. Here we have demonstrated that Doxorubicin inhibited TGFbeta-signaling in human lung adenocarcinoma A549 cells, namely, it blocked TGFbeta1-induced activation of Smad3-responsive CAGA(12)-Luc reporter, but did not affect c-myc-Luc reporter. That effect was observed as early as after 1-3 h of treating these cells with Doxorubicin, while the other drugs cisplatin or methotrexate did not alter activation of CAGA(12)-Luc reporter under the same conditions. Besides, after 1 h action, Doxorubicin abrogated TGFbeta-induced translocation of Smad3-protein from the cytoplasm to the nucleus. Down-regulation of expression of Smad2, Smad3, and Smad4 proteins, and up-regulation of inhibitory Smad7 protein upon Doxorubicin treatment, were found after 12-24 h of Doxorubicin treatment. Phosphorylation of Smad2/3 proteins was also affected by Doxorubicin. Summarizing, we have found that human tumor cells treatment with Doxorubicin resulted in the inhibition of TGFbeta-signaling at both early (1 h) and later (12 h) stages of the drug action. Such inhibition can be a new potential mechanism for Doxorubicin action towards tumor cells.
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12
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Farrington DL, Yingling JM, Fill JA, Yan L, Qian YW, Shou J, Wang X, Ehsani ME, Cleverly AL, Daly TM, Lahn M, Konrad RJ, Ray CA. Development and validation of a phosphorylated SMAD ex vivo stimulation assay. Biomarkers 2007; 12:313-30. [PMID: 17453744 DOI: 10.1080/13547500601162441] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Assessing the pharmacodynamics (PD) of a potential therapeutic through the use of a downstream biomarker is essential. This is traditionally performed in the target tissue but limited volume and invasiveness of sampling pose challenges with solid tumours. Currently, there are several small molecule receptor kinase inhibitors and large molecule therapeutic antibodies in clinical trials that interfere with TGFbeta signalling to treat various forms of cancer. With the advent of these new therapies, there is a need for a surrogate tissue that is easily accessible and indicative of tumour response. We propose the use of an ex vivo TGFbeta1 stimulation of peripheral blood mononuclear cells (PBMCs) coupled with the measurement of phosphorylated SMAD2 (Sma/Mothers Against dpp, a downstream transcriptional activator) using a sandwich ELISA. TGFbeta is involved in many different cellular responses, such as proliferation, angiogenesis, migration, invasion and immunomodulation. SMAD2 and SMAD3 are phosphorylated as a result of the canonical cascade through ligand binding and receptor kinase activation. These phosphorylated SMADs (pSMAD) associate with SMAD4, a co-SMAD, and transcriptionally activate TGFbeta-mediated genes. This paper describes the novel method for measuring the downstream effects of inhibiting canonical TGFbeta signalling using ex vivo stimulation of surrogate tissue to predict tumour response. In addition, we present the assay validation rationale and data. This novel, validated assay can be used to gain insight into clinical trials regarding TGFbeta signal modulation by multiple inhibitor platforms for both large and small molecules.
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MESH Headings
- Activin Receptors, Type I/antagonists & inhibitors
- Animals
- Biomarkers/analysis
- Biomarkers/metabolism
- Blotting, Western
- Cell Line, Tumor
- Data Interpretation, Statistical
- Dose-Response Relationship, Drug
- Drug Evaluation, Preclinical/methods
- Enzyme-Linked Immunosorbent Assay
- Female
- Humans
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/metabolism
- Mice
- Mice, Nude
- Neoplasms/drug therapy
- Neoplasms/metabolism
- Neoplasms/pathology
- Phosphorylation/drug effects
- Protein Kinase Inhibitors/pharmacology
- Protein Serine-Threonine Kinases
- Rats
- Rats, Inbred F344
- Receptor, Transforming Growth Factor-beta Type I
- Receptors, Transforming Growth Factor beta/antagonists & inhibitors
- Reproducibility of Results
- Smad Proteins/analysis
- Smad Proteins/metabolism
- Smad2 Protein/analysis
- Smad2 Protein/metabolism
- Smad3 Protein/analysis
- Smad3 Protein/metabolism
- Transforming Growth Factor beta1/pharmacology
- Xenograft Model Antitumor Assays/methods
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Affiliation(s)
- D L Farrington
- Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA.
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13
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Milliat F, François A, Isoir M, Deutsch E, Tamarat R, Tarlet G, Atfi A, Validire P, Bourhis J, Sabourin JC, Benderitter M. Influence of endothelial cells on vascular smooth muscle cells phenotype after irradiation: implication in radiation-induced vascular damages. Am J Pathol 2006; 169:1484-95. [PMID: 17003501 PMCID: PMC1698856 DOI: 10.2353/ajpath.2006.060116] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Damage to vessels is one of the most common effects of therapeutic irradiation on normal tissues. We undertook a study in patients treated with preoperative radiotherapy and demonstrated in vivo the importance of proliferation, migration, and fibrogenic phenotype of vascular smooth muscle cells (VSMCs) in radiation-induced vascular damage. These lesions may result from imbalance in the cross talk between endothelial cells (ECs) and VSMCs. Using co-culture models, we examined whether ECs influence proliferation, migration, and fibrogenic phenotype of VSMCs. In the presence of irradiated ECs, proliferation and migration of VSMCs were increased. Moreover, expressions of alpha-smooth muscle actin, connective tissue growth factor, plasminogen activator inhibitor type 1, heat shock protein 27, and collagen type III, alpha 1 were up-regulated in VSMCs exposed to irradiated ECs. Secretion of transforming growth factor (TGF)-beta1 was increased after irradiation of ECs, and irradiated ECs activated the Smad pathway in VSMCs by inducing Smad3/4 nuclear translocation and Smad-dependent promoter activation. Using small interferring RNA targeting Smad3 and a TGFbeta-RII neutralizing antibody, we demonstrate that a TGF-beta1/TGF-beta-RII/Smad3 pathway is involved in the fibrogenic phenotype of VSMCs induced by irradiated ECs. In conclusion, we show the importance of proliferation, migration, and fibrogenic phenotype of VSMCs in patients. Moreover, we demonstrate in vitro that ECs influence these fundamental mechanisms involved in radiation-induced vascular damages.
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Affiliation(s)
- Fabien Milliat
- Laboratory of Radiopathology, Institute for Radiological Protection and Nuclear Safety (IRSN), BP17, 92262 Fontenay-aux-Roses, France.
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14
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Leung SY, Niimi A, Noble A, Oates T, Williams AS, Medicherla S, Protter AA, Chung KF. Effect of transforming growth factor-beta receptor I kinase inhibitor 2,4-disubstituted pteridine (SD-208) in chronic allergic airway inflammation and remodeling. J Pharmacol Exp Ther 2006; 319:586-94. [PMID: 16888081 DOI: 10.1124/jpet.106.109314] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Transforming growth factor (TGF)-beta is a multifunctional regulator of cell growth and differentiation with both pro- and anti-inflammatory properties. We used an inhibitor of TGF-beta receptor I (TGF-betaRI) kinase, SD-208 (2,4-disubstituted pteridine, a ATP-competitive inhibitor of TGF-betaRI kinase), to determine the role of TGF-beta in airway allergic inflammation and remodeling. Brown-Norway rats sensitized and repeatedly exposed to ovalbumin (OVA) aerosol challenge were orally administered SD-208 twice daily, before each of six OVA exposures to determine the preventive effects, or only before each of the last three of six OVA exposures to investigate its reversal effects. SD-208 (60 mg/kg) reversed bronchial hyperresponsiveness (BHR) induced by repeated allergen exposure, but it did not prevent it. SD-208 prevented changes in serum total and OVA-specific IgE, but it did not reverse them. SD-208 had both a preventive and reversal effect on airway inflammation as measured by major basic protein-positive eosinophils and CD2(+) T-cell counts in mucosal airways, cell proliferation measured by 5-bromo-2'-deoxyuridine expression in airway smooth muscle (ASM) cells and epithelial cells, and goblet cell hyperplasia induced by repeated allergen challenges. There was a significant decrease in intracellular Smad2/3 expression. SD-208 did not significantly decrease the increased ASM thickness induced by allergen exposure. These findings support a proinflammatory and proremodeling role for TGF-beta in allergic airway inflammation. Inhibition of TGF-betaRI kinase activities by SD-208 may be a useful approach to the reversal of BHR and to the prevention and reversal of inflammatory and remodeling features of chronic asthma.
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Affiliation(s)
- Sum Yee Leung
- National Heart and Lung Institute, Dovehouse St., London SW3 6LY, UK
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15
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Ouellet V, Guyot MC, Le Page C, Filali-Mouhim A, Lussier C, Tonin PN, Provencher DM, Mes-Masson AM. Tissue array analysis of expression microarray candidates identifies markers associated with tumor grade and outcome in serous epithelial ovarian cancer. Int J Cancer 2006; 119:599-607. [PMID: 16572426 DOI: 10.1002/ijc.21902] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Molecular profiling is a powerful approach to identify potential clinical markers for diagnosis and prognosis as well as providing a better understanding of the biology of epithelial ovarian cancer. On the basis of the analysis of HuFL expression data, we have previously identified genes that distinguish low malignant potential and invasive serous epithelial ovarian tumors. In this study, we used immunohistochemistry to monitor a subset of differently expressed candidates (Ahr, Paep, Madh3, Ran, Met, Mek1, Ccne1, Ccd20, Cks1 and Cas). A tissue array composed of 244 serous tumors of different grades (0-3) and stages (I-IV) was used in this analysis. All markers assayed presented differential protein expression between serous tumors of low and high grade. Significant differences in Ccne1 and Ran expression were observed in a comparison of low malignant potential and grade 1 tumor samples (p<0.01). In addition, irrespective of the grade, Ccne1, Ran, Cdc20 and Cks1 showed significant differences of expression in association with the clinical stage of disease. While high level of Ccne1 have previously been associated with poor outcomes, here we found that high level of either Ran or Cdc20 appear to be more tightly associated with a poor prognosis (p<0.001, 0.03, respectively). The application of these biomarkers in both the initial diagnosis and prognostic attributes of patients with epithelial ovarian tumors should prove to be useful in patient management.
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Affiliation(s)
- Véronique Ouellet
- Centre de Recherche du Centre hospitalier de l'Université de Montréal/ Institut du cancer de Montréal, Montreal, Canada
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16
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Zhang RY, Wang LF, Zhang L, Meng XN, Li SJ, Wang WR. Effects of angiotensin converting enzyme inhibitor, angiotensin II type I receptor blocker and their combination on postinfarcted ventricular remodeling in rats. Chin Med J (Engl) 2006; 119:649-55. [PMID: 16635409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023] Open
Abstract
BACKGROUND Transforming growth factor (TGF) beta(1)-Smads signal plays an important role in cardiac remodeling following myocardial infarction (MI). In addition, both angiotensin converting enzyme inhibitor (ACEI) and angiotensin II type I receptor blocker (ARB) can effectively prevent left ventricular remodeling. The current study focused on whether the combination of ACEI and ARB is more beneficial for preventing ventricular remodeling and whether Smad proteins mediate this beneficial effect. METHODS MI was induced by ligating the left anterior descending coronary artery in rats. Twenty-four hours after ligation, the survived rats were randomly divided into five groups and treated for 8 weeks: placebo group, ACEI group (benazepril 10 mg.kg(-1).d(-1)), ARB group (irbesartan 50 mg.kg(-1).d(-1)), ACEI + ARB group (benazepril 10 mg.kg(-1).d(-1) + irbesartan 50 mg.kg(-1).d(-1)) and control group (sham-operated rats). After 8 weeks, we examined the following indexes: the ratio of ventricular weight to body weight (VW/BW), left ventricular end diastolic dimension (LVDd), ejection fraction (EF), fractional shortening (FS), ratio of E-wave to A-wave velocity, collagen of noninfarcted zone, the mRNA expression of TGFbeta(1), Smad 2, and Smad 3 by RT-PCR in noninfarcted zone, the protein expression of Smad 2 and Smad 3 in noninfarcted zone by Western blot. RESULTS VW/BW significantly increased in the placebo groups compared with that in the control group (P < 0.01). This increase was limited in ACEI, ARB, and combined groups (P < 0.01 compared with placebo group). There was no significant difference among the three actively treated groups. Collagen was increased in placebo group (5.68 +/- 0.5)% compared with that in control group (P < 0.01). ACEI, ARB and combined treatment attenuated this increase of collagen [(4.3 +/- 0.5)%, (3.5 +/- 0.5)%, (3.2 +/- 0.4)%] in comparison with that in placebo group (P < 0.01 respectively). Combined treatment showed more significant effect on collagen deposition. EF and FS significantly decreased, LVDd and E/A significantly increased in placebo group compared with that in control group (P < 0.01 respectively). ACEI, ARB and combined treatment ameliorated these indexes (P < 0.01 compared with placebo group). The mRNA expression of TGFbeta(1), Smad 2, and Smad 3 (0.700 +/- 0.045, 0.959 +/- 0.037 and 0.850 +/- 0.051) increased in placebo group compared with that in control group (P < 0.01). ACEI, ARB and combined treatment normalized the increase (P < 0.01). Furthermore, ARB and combined treatment proved to be more effective in decreasing TGF beta(1) and Smad mRNA expression than ACEI treatment (P < 0.01). The expression of Smad 2 and Smad 3 protein increased in placebo group compared with that in control group (P < 0.01). ACEI, ARB and combined treatment normalized the increase (P < 0.01). Furthermore, ARB and combined treatment proved to be more effective than ACEI alone (P < 0.01). CONCLUSIONS TGFbeta(1)-Smads signal activation is correlated with ventricular remodeling following MI. ACEI and ARB treatment prevents ventricular remodeling by inhibiting expression of Smad 2 and Smad 3. ARB and combined treatment are more effective than ACEI alone.
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Affiliation(s)
- Rui-ying Zhang
- Department of Cardiology First Clinical Hospital, Harbin Medical University, Harbin 150001, China
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17
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Yasutome M, Gunn J, Korc M. Restoration of Smad4 in BxPC3 pancreatic cancer cells attenuates proliferation without altering angiogenesis. Clin Exp Metastasis 2006; 22:461-73. [PMID: 16320109 DOI: 10.1007/s10585-005-2891-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Accepted: 09/07/2005] [Indexed: 01/18/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is an aggressive human malignancy in which the transforming growth factor beta (TGF-beta) signal transducer, Smad4, is commonly mutated or deleted. BxPC3 human pancreatic cancer cells exhibit a homozygous deletion of the Smad4 gene, yet are growth inhibited by TGF-beta1. In the present study, we sought to determine whether reintroduction of Smad4 into BxPC3 cells alters their behavior in vitro and in vivo. Sham transfected and Smad4 expressing BxPC3 cells exhibited similar responses to TGF-beta1 with respect to p21 upregulation, hypophosphorylation of the RB protein, Smad2 phosphorylation, and Smad2/3 nuclear translocation. TGF-beta1 did not alter p27 expression, and silencing of p21 with an appropriate siRNA markedly attenuated TGF-beta1-mediated growth inhibition. Nonetheless, the presence of Smad4 was associated in vitro with a more prolonged doubling time, enhanced sensitivity to the growth inhibitory actions of exogenous TGF-beta1, and a more flattened cellular morphology. In vivo, Smad4 expression resulted in delayed tumor growth and decreased cellular proliferation, without effects on either apoptosis or angiogenesis. These findings indicate that, in spite of the absence of Smad4, growth inhibition in BxPC3 cells by TGF-beta1 is dependent on p21 upregulation and maintenance of RB in a hypophosphorylated, active state. Moreover, the presence of a functional Smad4 attenuates the capacity of BxPC3 cells to proliferate in vivo. However, this effect is transient, indicating that Smad4 growth inhibitory actions are circumvented in the later stages of pancreatic tumorigenicity.
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Affiliation(s)
- Michiya Yasutome
- Department of Medicine and Pharmacology, Dartmouth-Hitchcock Medical Center and Dartmouth Medical School, Hanover, USA
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18
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Wenzel K, Zabojszcza J, Carl M, Taubert S, Lass A, Harris CL, Ho M, Schulz H, Hummel O, Hubner N, Osterziel KJ, Spuler S. Increased Susceptibility to Complement Attack due to Down-Regulation of Decay-Accelerating Factor/CD55 in Dysferlin-Deficient Muscular Dystrophy. J Immunol 2005; 175:6219-25. [PMID: 16237120 DOI: 10.4049/jimmunol.175.9.6219] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Dysferlin is expressed in skeletal and cardiac muscles. However, dysferlin deficiency results in skeletal muscle weakness, but spares the heart. We compared intraindividual mRNA expression profiles of cardiac and skeletal muscle in dysferlin-deficient SJL/J mice and found down-regulation of the complement inhibitor, decay-accelerating factor/CD55, in skeletal muscle only. This finding was confirmed on mRNA and protein levels in two additional dysferlin-deficient mouse strains, A/J mice and Dysf-/- mice, as well as in patients with dysferlin-deficient muscular dystrophy. In vitro, the absence of CD55 led to an increased susceptibility of human myotubes to complement attack. Evidence is provided that decay-accelerating factor/CD55 is regulated via the myostatin-SMAD pathway. In conclusion, a novel mechanism of muscle fiber injury in dysferlin-deficient muscular dystrophy is demonstrated, possibly opening therapeutic avenues in this to date untreatable disorder.
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Affiliation(s)
- Katrin Wenzel
- Myology Research Group, Department of Neurology, Charité University Hospital, Berlin, Germany
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