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Ma X, Tan Z, Zhang Q, Ma K, Xiao J, Wang X, Wang Y, Zhong M, Wang Y, Li J, Zeng X, Guan W, Wang S, Gong K, Wei GH, Wang Z. VHL Ser65 mutations enhance HIF2α signaling and promote epithelial-mesenchymal transition of renal cancer cells. Cell Biosci 2022; 12:52. [PMID: 35505422 PMCID: PMC9066845 DOI: 10.1186/s13578-022-00790-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 04/18/2022] [Indexed: 12/13/2022] Open
Abstract
Abstract
Background
Von Hippel-Lindau (VHL) disease is an autosomal dominant genetic neoplastic disorder caused by germline mutation or deletion of the VHL gene, characterized by the tendency to develop multisystem benign or malignant tumors. The mechanism of VHL mutants in pathogenicity is poorly understand.
Results
Here we identified heterozygous missense mutations c.193T > C and c.194C > G in VHL in several patients from two Chinese families. These mutations are predicted to cause Serine (c.193T > C) to Proline and Tryptophan (c.194C > G) substitution at residue 65 of VHL protein (p.Ser65Pro and Ser65Trp). Ser65 residue, located within the β-domain and nearby the interaction sites with hypoxia-inducing factor α (HIFα), is highly conserved among different species. We observed gain of functions in VHL mutations, thereby stabilizing HIF2α protein and reprograming HIF2α genome-wide target gene transcriptional programs. Further analysis of independent cohorts of patients with renal carcinoma revealed specific HIF2α gene expression signatures in the context of VHL Ser65Pro or Ser65Trp mutation, showing high correlations with hypoxia and epithelial-mesenchymal transition signaling activities and strong associations with poor prognosis.
Conclusions
Together, our findings highlight the crucial role of pVHL-HIF dysregulation in VHL disease and strengthen the clinical relevance and significance of the missense mutations of Ser65 residue in pVHL in the familial VHL disease.
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miR-424/322 protects against abdominal aortic aneurysm formation by modulating the Smad2/3/runt-related transcription factor 2 axis. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 27:656-669. [PMID: 35036072 PMCID: PMC8752907 DOI: 10.1016/j.omtn.2021.12.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 12/17/2021] [Indexed: 12/12/2022]
Abstract
Rupture of abdominal aortic aneurysms (AAAs) is one of the leading causes of sudden death in the elderly population. The osteogenic transcription factor runt-related gene (RUNX) encodes multifunctional mediators of intracellular signal transduction pathways in vascular remodeling and inflammation. We aimed to evaluate the roles of RUNX2 and its putative downstream target miR-424/322 in the modulation of several AAA progression-related key molecules, such as matrix metalloproteinases and vascular endothelial growth factor. In the GEO database, we found that male patients with AAAs had higher RUNX2 expression than did control patients. Several risk factors for aneurysm induced the overexpression of MMPs through RUNX2 transactivation, and this was dependent on Smad2/3 upregulation in human aortic smooth muscle cells. miR-424 was overexpressed through RUNX2 after angiotensin II (AngII) challenge. The administration of siRUNX2 and miR-424 mimics attenuated the activation of the Smad/RUNX2 axis and the overexpression of several AAA progression-related molecules in vitro. Compared to their littermates, miR-322 KO mice were susceptible to AngII-induced AAA, whereas the silencing of RUNX2 and the administration of exogenous miR-322 mimics ameliorated the AngII-induced AAA in ApoE KO mice. Overall, we established the roles of the Smad/RUNX2/miR-424/322 axis in AAA pathogenesis. We demonstrated the therapeutic potentials of miR-424/322 mimics and RUNX2 inhibitor for AAA progression.
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Sanaei‐Ardekani M, Kamal S, Handy W, Alam S, Salaheldin A, Moore A, Movafagh S. Suppression of collagen IV alpha-2 subunit by prolyl hydroxylase domain inhibition via hypoxia-inducible factor-1 in chronic kidney disease. Pharmacol Res Perspect 2021; 9:e00872. [PMID: 34617686 PMCID: PMC8495681 DOI: 10.1002/prp2.872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/08/2021] [Accepted: 09/11/2021] [Indexed: 12/14/2022] Open
Abstract
Elevation of hypoxia-inducible factor 1 protein has been shown to be protective in acute kidney injury and HIF1α enhancing drug therapies are currently in clinical trials for the treatment of anemia of chronic kidney disease. Despite its benefits, long-term HIF1 elevation seems to be associated with additional effects in the kidneys such as tubulointerstitial fibrosis. To better understand the effects of prolonged HIF1 exposure, assessment of baseline and post-therapy levels of HIF1α and other related biomarkers is essential. In this study, we assessed the effect of HIF1α enhancement using prolyl hydroxylase inhibitor (PHD-I) DMOG, on a key profibrotic marker of kidney disease. In specific, we examined the change in expression of Collagen 4 subunit A2 in cultured urinary cells of CKD patients pre and post 24-hour exposure to 1mM DMOG. Our results show that besides HIF1α enhancement, COL4A2 protein is suppressed in presence of DMOG. To determine if this effect is mediated by HIF1, we used HIF1α gene silencing in HEK293 cells and examined the effect of DMOG on protein and gene expression of COL4A2 post 24-hour exposure. We showed that silencing HIF1α reverses and amplifies the expression of COL4A2 in HEK293 cells. Our data suggest that HIF1 directly regulates the expression of COL4A2 in kidney cells and that HIF1α enhancing therapy has suppressive effects on COL4A2 that may be clinically relevant and must be considered in determining the safety and efficacy of these drugs in the treatment of anemia.
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Affiliation(s)
| | - Shyreen Kamal
- Bernard J Dunn School of PharmacyShenandoah UniversityFairfaxVirginiaUSA
| | - Whitney Handy
- Bernard J Dunn School of PharmacyShenandoah UniversityFairfaxVirginiaUSA
| | - Sidrah Alam
- Bernard J Dunn School of PharmacyShenandoah UniversityFairfaxVirginiaUSA
| | - Aya Salaheldin
- Bernard J Dunn School of PharmacyShenandoah UniversityFairfaxVirginiaUSA
| | - Anderson Moore
- Bernard J Dunn School of PharmacyShenandoah UniversityFairfaxVirginiaUSA
| | - Shahrzad Movafagh
- Department of PharmacogenomicsShenandoah University School of PharmacyINOVA Center for Personalized MedicineFairfaxVirginiaUSA
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Rothe R, Schulze S, Neuber C, Hauser S, Rammelt S, Pietzsch J. Adjuvant drug-assisted bone healing: Part II - Modulation of angiogenesis. Clin Hemorheol Microcirc 2020; 73:409-438. [PMID: 31177206 DOI: 10.3233/ch-199103] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The treatment of critical-size bone defects following complicated fractures, infections or tumor resections is a major challenge. The same applies to fractures in patients with impaired bone healing due to systemic inflammatory and metabolic diseases. Despite considerable progress in development and establishment of new surgical techniques, design of bone graft substitutes and imaging techniques, these scenarios still represent unresolved clinical problems. However, the development of new active substances offers novel potential solutions for these issues. This work discusses therapeutic approaches that influence angiogenesis or hypoxic situations in healing bone and surrounding tissue. In particular, literature on sphingosine-1-phosphate receptor modulators and nitric oxide (NO•) donors, including bi-functional (hybrid) compounds like NO•-releasing cyclooxygenase-2 inhibitors, was critically reviewed with regard to their local and systemic mode of action.
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Affiliation(s)
- Rebecca Rothe
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Sabine Schulze
- University Center of Orthopaedics and Traumatology (OUC), University Hospital Carl Gustav Carus, Dresden, Germany.,Center for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Christin Neuber
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Sandra Hauser
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Stefan Rammelt
- University Center of Orthopaedics and Traumatology (OUC), University Hospital Carl Gustav Carus, Dresden, Germany.,Center for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Center for Regenerative Therapies Dresden (CRTD), Tatzberg 4, Dresden, Germany
| | - Jens Pietzsch
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany.,Technische Universität Dresden, School of Science, Faculty of Chemistry and Food Chemistry, Dresden, Germany
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Xu Q, Liu Z, Guo L, Liu R, Li R, Chu X, Yang J, Luo J, Chen F, Deng M. Hypoxia Mediates Runt-Related Transcription Factor 2 Expression via Induction of Vascular Endothelial Growth Factor in Periodontal Ligament Stem Cells. Mol Cells 2019; 42:763-772. [PMID: 31659886 PMCID: PMC6883976 DOI: 10.14348/molcells.2019.0023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 07/31/2019] [Accepted: 09/05/2019] [Indexed: 12/12/2022] Open
Abstract
Periodontitis is characterized by the loss of periodontal tissues, especially alveolar bone. Common therapies cannot satisfactorily recover lost alveolar bone. Periodontal ligament stem cells (PDLSCs) possess the capacity of self-renewal and multilineage differentiation and are likely to recover lost alveolar bone. In addition, periodontitis is accompanied by hypoxia, and hypoxia-inducible factor-1α (HIF-1α) is a master transcription factor in the response to hypoxia. Thus, we aimed to ascertain how hypoxia affects runt-related transcription factor 2 (RUNX2), a key osteogenic marker, in the osteogenesis of PDLSCs. In this study, we found that hypoxia enhanced the protein expression of HIF-1α, vascular endothelial growth factor (VEGF), and RUNX2 ex vivo and in situ. VEGF is a target gene of HIF-1α, and the increased expression of VEGF and RUNX2 proteins was enhanced by cobalt chloride (CoCl2, 100 μmol/L), an agonist of HIF-1α, and suppressed by 3-(5'-hydroxymethyl-2'-furyl)-1-benzyl indazole (YC-1, 10 μmol/L), an antagonist of HIF-1α. In addition, VEGF could regulate the expression of RUNX2, as RUNX2 expression was enhanced by human VEGF (hVEGF165) and suppressed by VEGF siRNA. In addition, knocking down VEGF could decrease the expression of osteogenesis-related genes, i.e., RUNX2, alkaline phosphatase (ALP), and type I collagen (COL1), and hypoxia could enhance the expression of ALP, COL1, and osteocalcin (OCN) in the early stage of osteogenesis of PDLSCs. Taken together, our results showed that hypoxia could mediate the expression of RUNX2 in PDLSCs via HIF-1α-induced VEGF and play a positive role in the early stage of osteogenesis of PDLSCs.
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Affiliation(s)
- Qian Xu
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
- Department of Stomatology, Children’s Hospital of Chongqing Medical University, Chongqing 400014,
China
| | - Zhihua Liu
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
| | - Ling Guo
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
| | - Rui Liu
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
| | - Rulei Li
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
| | - Xiang Chu
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
| | - Jiajia Yang
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
| | - Jia Luo
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
| | - Faming Chen
- Department of Periodontology, School of Stomatology, Air Force Medical University, Xi’an 710032,
China
| | - Manjing Deng
- Department of Stomatology, Daping Hospital & Research Institute of Surgery, Army Medical University, Chongqing 400042,
China
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Ozaki T, Yu M, Yin D, Sun D, Zhu Y, Bu Y, Sang M. Impact of RUNX2 on drug-resistant human pancreatic cancer cells with p53 mutations. BMC Cancer 2018; 18:309. [PMID: 29558908 PMCID: PMC5861661 DOI: 10.1186/s12885-018-4217-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 03/12/2018] [Indexed: 12/20/2022] Open
Abstract
Background Despite the remarkable advances in the early diagnosis and treatment, overall 5-year survival rate of patients with pancreatic cancer is less than 10%. Gemcitabine (GEM), a cytidine nucleoside analogue and ribonucleotide reductase inhibitor, is a primary option for patients with advanced pancreatic cancer; however, its clinical efficacy is extremely limited. This unfavorable clinical outcome of pancreatic cancer patients is at least in part attributable to their poor response to anti-cancer drugs such as GEM. Thus, it is urgent to understand the precise molecular basis behind the drug-resistant property of pancreatic cancer and also to develop a novel strategy to overcome this deadly disease. Review Accumulating evidence strongly suggests that p53 mutations contribute to the acquisition and/or maintenance of drug-resistant property of pancreatic cancer. Indeed, certain p53 mutants render pancreatic cancer cells much more resistant to GEM, implying that p53 mutation is one of the critical determinants of GEM sensitivity. Intriguingly, runt-related transcription factor 2 (RUNX2) is expressed at higher level in numerous human cancers such as pancreatic cancer and osteosarcoma, indicating that, in addition to its pro-osteogenic role, RUNX2 has a pro-oncogenic potential. Moreover, a growing body of evidence implies that a variety of miRNAs suppress malignant phenotypes of pancreatic cancer cells including drug resistance through the down-regulation of RUNX2. Recently, we have found for the first time that forced depletion of RUNX2 significantly increases GEM sensitivity of p53-null as well as p53-mutated pancreatic cancer cells through the stimulation of p53 family TAp63/TAp73-dependent cell death pathway. Conclusions Together, it is likely that RUNX2 is one of the promising molecular targets for the treatment of the patients with pancreatic cancer regardless of their p53 status. In this review article, we will discuss how to overcome the serious drug-resistant phenotype of pancreatic cancer.
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Affiliation(s)
- Toshinori Ozaki
- Laboratory of DNA Damage Signaling, Chiba Cancer Center Research Institute, Chiba, 260-8717, Japan.
| | - Meng Yu
- Department of Laboratory Animal of China Medical University, Shenyang, 110001, People's Republic of China
| | - Danjing Yin
- Research Center, Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050017, People's Republic of China
| | - Dan Sun
- Department of Urology, First Hospital of China Medical University, Shenyang, 110001, People's Republic of China
| | - Yuyan Zhu
- Department of Urology, First Hospital of China Medical University, Shenyang, 110001, People's Republic of China
| | - Youquan Bu
- Department of Biochemistry and Molecular Biology, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Meixiang Sang
- Research Center, Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050017, People's Republic of China
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Jover E, Silvente A, Marin F, Martinez‐Gonzalez J, Orriols M, Martinez CM, Puche CM, Valdés M, Rodriguez C, Hernández‐Romero D. Inhibition of enzymes involved in collagen cross‐linking reduces vascular smooth muscle cell calcification. FASEB J 2018; 32:4459-4469. [DOI: 10.1096/fj.201700653r] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Eva Jover
- Hospital Clínico Universitario Virgen de la ArrixacaUniversidad de MurciaInstituto Murciano de Investigatión Biosanitaria (IMIB)‐ArrixacaMurciaSpain
- Bristol Medical School of Translational Health SciencesUniversity of BristolBristolUnited Kingdom
| | - Ana Silvente
- Hospital Clínico Universitario Virgen de la ArrixacaUniversidad de MurciaInstituto Murciano de Investigatión Biosanitaria (IMIB)‐ArrixacaMurciaSpain
| | - Francisco Marin
- Hospital Clínico Universitario Virgen de la ArrixacaUniversidad de MurciaInstituto Murciano de Investigatión Biosanitaria (IMIB)‐ArrixacaMurciaSpain
- Centro de Investigatión Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | - Jose Martinez‐Gonzalez
- Centro de Investigatión Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
- Instituto de Investigaciones Biomédicas de Barcelona‐Consejo Superior de Investigaciones Cientificas (IIBB‐CSIC)Institut d'Investigacions Biomèdiques (IIB)‐Sant PauBarcelonaSpain
| | - Mar Orriols
- Centro de Investigatión Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | | | - Carmen María Puche
- Hospital Clínico Universitario Virgen de la ArrixacaUniversidad de MurciaInstituto Murciano de Investigatión Biosanitaria (IMIB)‐ArrixacaMurciaSpain
| | - Mariano Valdés
- Hospital Clínico Universitario Virgen de la ArrixacaUniversidad de MurciaInstituto Murciano de Investigatión Biosanitaria (IMIB)‐ArrixacaMurciaSpain
- Centro de Investigatión Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
| | - Cristina Rodriguez
- Centro de Investigatión Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
- Institut de Recerca del Hospital de la Santa Creu i Sant Pau‐Programa Instituto Catalán de Ciencias Cardiovasculares (ICCC)IIB‐Sant PauBarcelonaSpain
| | - Diana Hernández‐Romero
- Hospital Clínico Universitario Virgen de la ArrixacaUniversidad de MurciaInstituto Murciano de Investigatión Biosanitaria (IMIB)‐ArrixacaMurciaSpain
- Centro de Investigatión Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV)MadridSpain
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Dimethyloxalylglycine-embedded Poly(ε-caprolactone) Fiber Meshes Promote Odontoblastic Differentiation of Human Dental Pulp–derived Cells. J Endod 2018; 44:98-103.e1. [DOI: 10.1016/j.joen.2017.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/30/2017] [Accepted: 09/02/2017] [Indexed: 11/18/2022]
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9
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Zhang Q, Oh JH, Park CH, Baek JH, Ryoo HM, Woo KM. Effects of Dimethyloxalylglycine-Embedded Poly(ε-caprolactone) Fiber Meshes on Wound Healing in Diabetic Rats. ACS APPLIED MATERIALS & INTERFACES 2017; 9:7950-7963. [PMID: 28211272 DOI: 10.1021/acsami.6b15815] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Impaired wound healing in diabetic patients is associated with altered inflammatory responses, poor angiogenesis, deficient extracellular matrix (ECM) component, and peripheral neuropathy. To develop a wound dressing that is capable of the controlled delivery of bioactive small molecules that can improve diabetic wound healing, dimethyloxalylglycine (DMOG)-embedded poly(ε-caprolactone) (PCL) fiber (PCLF/DMOG) meshes are fabricated by electrospinning, and the effects of the PCLF/DMOG meshes on wound healing in diabetic rats are evaluated. Electrospun PCLF/DMOG meshes increase not only the wound closure, re-epithelialization ratio, epithelial maturation (K-10-positive epidermis), and collagen-positive area but also the numbers of angiogenic marker (CD-31)-positive and neuronal marker (neurofilament)-positive cells compared to PCLF (p < 0.05). In in vitro examinations, RAW264.7 macrophages grown on PCLF/DMOG meshes enhance the expression of growth factors (IGF-1, HB-EGF, and NGF) and anti-inflammatory factors (TGF-β1 and IL-4) but decrease that of pro-inflammatory factors (IL-1β and IL-6). Keratinocyte migration is increased by conditioned media from the cultures of the macrophages grown either in the presence of DMOG or on PCLF/DMOG. Collectively, these results indicate that PCLF/DMOG meshes promote impaired wound healing in diabetic rats by modulating macrophage responses, enhancing angiogenesis and nerve innervation, and improving ECM synthesis.
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Affiliation(s)
- Qiankun Zhang
- Department of Molecular Genetics, Dental Research Institute and BK21 Program, School of Dentistry, and ‡Department of Pharmacology & Dental Therapeutics, School of Dentistry, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Joung-Hwan Oh
- Department of Molecular Genetics, Dental Research Institute and BK21 Program, School of Dentistry, and ‡Department of Pharmacology & Dental Therapeutics, School of Dentistry, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Chan Ho Park
- Department of Molecular Genetics, Dental Research Institute and BK21 Program, School of Dentistry, and ‡Department of Pharmacology & Dental Therapeutics, School of Dentistry, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jeong-Hwa Baek
- Department of Molecular Genetics, Dental Research Institute and BK21 Program, School of Dentistry, and ‡Department of Pharmacology & Dental Therapeutics, School of Dentistry, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Hyun-Mo Ryoo
- Department of Molecular Genetics, Dental Research Institute and BK21 Program, School of Dentistry, and ‡Department of Pharmacology & Dental Therapeutics, School of Dentistry, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Kyung Mi Woo
- Department of Molecular Genetics, Dental Research Institute and BK21 Program, School of Dentistry, and ‡Department of Pharmacology & Dental Therapeutics, School of Dentistry, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
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Stoehr A, Yang Y, Patel S, Evangelista AM, Aponte A, Wang G, Liu P, Boylston J, Kloner PH, Lin Y, Gucek M, Zhu J, Murphy E. Prolyl hydroxylation regulates protein degradation, synthesis, and splicing in human induced pluripotent stem cell-derived cardiomyocytes. Cardiovasc Res 2016; 110:346-58. [PMID: 27095734 DOI: 10.1093/cvr/cvw081] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 04/12/2016] [Indexed: 12/12/2022] Open
Abstract
AIMS Protein hydroxylases are oxygen- and α-ketoglutarate-dependent enzymes that catalyse hydroxylation of amino acids such as proline, thus linking oxygen and metabolism to enzymatic activity. Prolyl hydroxylation is a dynamic post-translational modification that regulates protein stability and protein-protein interactions; however, the extent of this modification is largely uncharacterized. The goals of this study are to investigate the biological consequences of prolyl hydroxylation and to identify new targets that undergo prolyl hydroxylation in human cardiomyocytes. METHODS AND RESULTS We used human induced pluripotent stem cell-derived cardiomyocytes in combination with pulse-chase amino acid labelling and proteomics to analyse the effects of prolyl hydroxylation on protein degradation and synthesis. We identified 167 proteins that exhibit differences in degradation with inhibition of prolyl hydroxylation by dimethyloxalylglycine (DMOG); 164 were stabilized. Proteins involved in RNA splicing such as serine/arginine-rich splicing factor 2 (SRSF2) and splicing factor and proline- and glutamine-rich (SFPQ) were stabilized with DMOG. DMOG also decreased protein translation of cytoskeletal and sarcomeric proteins such as α-cardiac actin. We searched the mass spectrometry data for proline hydroxylation and identified 134 high confidence peptides mapping to 78 unique proteins. We identified SRSF2, SFPQ, α-cardiac actin, and cardiac titin as prolyl hydroxylated. We identified 29 prolyl hydroxylated proteins that showed a significant difference in either protein degradation or synthesis. Additionally, we performed next-generation RNA sequencing and showed that the observed decrease in protein synthesis was not due to changes in mRNA levels. Because RNA splicing factors were prolyl hydroxylated, we investigated splicing ± inhibition of prolyl hydroxylation and detected 369 alternative splicing events, with a preponderance of exon skipping. CONCLUSIONS This study provides the first extensive characterization of the cardiac prolyl hydroxylome and demonstrates that inhibition of α-ketoglutarate hydroxylases alters protein stability, translation, and splicing.
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Affiliation(s)
- Andrea Stoehr
- Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Yanqin Yang
- DNA Sequencing and Genomics Core, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Sajni Patel
- Proteomics Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Alicia M Evangelista
- Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Angel Aponte
- Proteomics Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Guanghui Wang
- Proteomics Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Poching Liu
- DNA Sequencing and Genomics Core, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jennifer Boylston
- Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Philip H Kloner
- Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Yongshun Lin
- iPS Cell Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Marjan Gucek
- Proteomics Core Facility, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jun Zhu
- DNA Sequencing and Genomics Core, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Elizabeth Murphy
- Systems Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
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11
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Favier FB, Britto FA, Ponçon B, Begue G, Chabi B, Reboul C, Meyer G, Py G. Endurance training prevents negative effects of the hypoxia mimetic dimethyloxalylglycine on cardiac and skeletal muscle function. J Appl Physiol (1985) 2015; 120:455-63. [PMID: 26679609 DOI: 10.1152/japplphysiol.00171.2015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 12/10/2015] [Indexed: 11/22/2022] Open
Abstract
Hypoxic preconditioning is a promising strategy to prevent hypoxia-induced damages to several tissues. This effect is related to prior stabilization of the hypoxia-inducible factor-1α via inhibition of the prolyl-hydroxylases (PHDs), which are responsible for its degradation under normoxia. Although PHD inhibition has been shown to increase endurance performance in rodents, potential side effects of such a therapy have not been explored. Here, we investigated the effects of 1 wk of dimethyloxalylglycine (DMOG) treatment (150 mg/kg) on exercise capacity, as well as on cardiac and skeletal muscle function in sedentary and endurance-trained rats. DMOG improved maximal aerobic velocity and endurance in both sedentary and trained rats. This effect was associated with an increase in red blood cells without significant alteration of skeletal muscle contractile properties. In sedentary rats, DMOG treatment resulted in enhanced left ventricle (LV) weight together with impairment in diastolic function, LV relaxation, and pulse pressure. Moreover, DMOG decreased maximal oxygen uptake (state 3) of isolated mitochondria from skeletal muscle. Importantly, endurance training reversed the negative effects of DMOG treatment on cardiac function and restored maximal mitochondrial oxygen uptake to the level of sedentary placebo-treated rats. In conclusion, we provide here evidence that the PHD inhibitor DMOG has detrimental influence on myocardial and mitochondrial function in healthy rats. However, one may suppose that the deleterious influence of PHD inhibition would be potentiated in patients with already poor physical condition. Therefore, the present results prompt us to take into consideration the potential side effects of PHD inhibitors when administrated to patients.
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Affiliation(s)
- Francois B Favier
- Institut National de la Recherche Agronomique, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier, France; Université de Montpellier, Montpellier, France;
| | - Florian A Britto
- Institut National de la Recherche Agronomique, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier, France; Université de Montpellier, Montpellier, France
| | - Benjamin Ponçon
- Laboratoire de Pharm-écologie cardiovasculaire, Avignon, France; and Université d'Avignon, Avignon, France
| | - Gwenaelle Begue
- Institut National de la Recherche Agronomique, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier, France; Université de Montpellier, Montpellier, France
| | - Beatrice Chabi
- Institut National de la Recherche Agronomique, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier, France; Université de Montpellier, Montpellier, France
| | - Cyril Reboul
- Laboratoire de Pharm-écologie cardiovasculaire, Avignon, France; and Université d'Avignon, Avignon, France
| | - Gregory Meyer
- Laboratoire de Pharm-écologie cardiovasculaire, Avignon, France; and Université d'Avignon, Avignon, France
| | - Guillaume Py
- Institut National de la Recherche Agronomique, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier, France; Université de Montpellier, Montpellier, France
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Müller HD, Cvikl B, Janjić K, Nürnberger S, Moritz A, Gruber R, Agis H. Effects of Prolyl Hydroxylase Inhibitor L-mimosine on Dental Pulp in the Presence of Advanced Glycation End Products. J Endod 2015; 41:1852-61. [PMID: 26395911 DOI: 10.1016/j.joen.2015.08.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 07/30/2015] [Accepted: 08/04/2015] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Proangiogenic prolyl hydroxylase (PHD) inhibitors represent a novel approach to stimulate tissue regeneration. Diabetes mellitus involves the accumulation of advanced glycation end products (AGEs). Here we evaluated the impact of AGEs on the response of human pulp tissue to the PHD inhibitor L-mimosine (L-MIM) in monolayer cultures of dental pulp-derived cells (DPCs) and tooth slice organ cultures. METHODS In monolayer cultures, DPCs were incubated with L-MIM and AGEs. Viability was assessed based on formazan formation, live-dead staining, annexin V/propidium iodide, and trypan blue exclusion assay. Vascular endothelial growth factor (VEGF), interleukin (IL)-6, and IL-8 production was evaluated by quantitative polymerase chain reaction and immunoassays. Furthermore, expression levels of odontoblast markers were assessed, and alizarin red staining was performed. Tooth slice organ cultures were performed, and VEGF, IL-6, and IL8 levels in their supernatants were measured by immunoassays. Pulp tissue vitality and morphology were assessed by MTT assay and histology. RESULTS In monolayer cultures of DPCs, L-MIM at nontoxic concentrations increased the production of VEGF and IL-8 in the presence of AGEs. Stimulation with L-MIM decreased alkaline phosphatase levels and matrix mineralization also in the presence of AGEs, whereas no significant changes in dentin matrix protein 1 and dentin sialophosphoprotein expression were observed. In tooth slice organ cultures, L-MIM increased VEGF but not IL-6 and IL-8 production in the presence of AGEs. The pulp tissue was vital, and no signs of apoptosis or necrosis were observed. CONCLUSIONS Overall, in the presence of AGEs, L-MIM increases the proangiogenic capacity, but decreases alkaline phosphatase expression and matrix mineralization.
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Affiliation(s)
- Heinz-Dieter Müller
- Department of Prosthodontics, Medical University of Vienna, Vienna, Austria; Department of Preventive, Restorative and Pediatric Dentistry, University of Bern, Bern, Switzerland; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Barbara Cvikl
- Department of Preventive, Restorative and Pediatric Dentistry, University of Bern, Bern, Switzerland; Austrian Cluster for Tissue Regeneration, Vienna, Austria; Department of Conservative Dentistry and Periodontology, Medical University of Vienna, Vienna, Austria
| | - Klara Janjić
- Austrian Cluster for Tissue Regeneration, Vienna, Austria; Department of Conservative Dentistry and Periodontology, Medical University of Vienna, Vienna, Austria
| | - Sylvia Nürnberger
- Austrian Cluster for Tissue Regeneration, Vienna, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria; Department of Trauma Surgery, Medical University of Vienna, Vienna, Austria
| | - Andreas Moritz
- Austrian Cluster for Tissue Regeneration, Vienna, Austria; Department of Conservative Dentistry and Periodontology, Medical University of Vienna, Vienna, Austria
| | - Reinhard Gruber
- Austrian Cluster for Tissue Regeneration, Vienna, Austria; Department of Oral Biology, Medical University of Vienna, Vienna, Austria; Laboratory for Oral Cell Biology, University of Bern, Bern, Switzerland
| | - Hermann Agis
- Austrian Cluster for Tissue Regeneration, Vienna, Austria; Department of Conservative Dentistry and Periodontology, Medical University of Vienna, Vienna, Austria.
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