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Yokokawa T, Boucherat O, Martineau S, Lemay SE, Breuils-Bonnet S, Krishna V, Kalyana-Sundaram S, Jeyaseelan J, Potus F, Bonnet S, Provencher S. Prognostic Significance of Proteomics-Discovered Circulating Inflammatory Biomarkers in Patients With Pulmonary Arterial Hypertension. J Am Heart Assoc 2024; 13:e032888. [PMID: 38874078 DOI: 10.1161/jaha.123.032888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 05/15/2024] [Indexed: 06/15/2024]
Abstract
BACKGROUND Pulmonary arterial hypertension (PAH) ultimately leads to right ventricular failure and premature death. The identification of circulating biomarkers with prognostic utility is considered a priority. As chronic inflammation is recognized as key pathogenic driver, we sought to identify inflammation-related circulating proteins that add incremental value to current risk stratification models for long-term survival in patients with PAH. METHODS AND RESULTS Plasma levels of 384 inflammatory proteins were measured with the proximity extension assay technology in patients with PAH (n=60) and controls with normal hemodynamics (n=28). Among these, 51 analytes were significantly overexpressed in the plasma of patients with PAH compared with controls. Cox proportional hazard analyses and C-statistics were performed to assess the prognostic value and the incremental prognostic value of differentially expressed proteins. A panel of 6 proteins (CRIM1 [cysteine rich transmembrane bone morphogenetic protein regulator 1], HGF [hepatocyte growth factor], FSTL3 [follistatin-like 3], PLAUR [plasminogen activator, urokinase receptor], CLSTN2 [calsyntenin 2], SPON1 [spondin 1]) were independently associated with death/lung transplantation at the time of PAH diagnosis after adjustment for the 2015 European Society of Cardiology/European Respiratory Society guidelines, the REVEAL (Registry to Evaluate Early and Long-Term PAH Disease Management) 2.0 risk scores, and the refined 4-strata risk assessment. CRIM1, PLAUR, FSTL3, and SPON1 showed incremental prognostic value on top of the predictive models. As determined by Western blot, FSTL3 and SPON1 were significantly upregulated in the right ventricle of patients with PAH and animal models (monocrotaline-injected and pulmonary artery banding-subjected rats). CONCLUSIONS In addition to revealing new actors likely involved in cardiopulmonary remodeling in PAH, our screening identified promising circulating biomarkers to improve risk prediction in PAH, which should be externally confirmed.
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Affiliation(s)
- Tetsuro Yokokawa
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
- Department of Cardiovascular Medicine Fukushima Medical University Fukushima Japan
| | - Olivier Boucherat
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
- Department of Medicine Université Laval Québec City Québec Canada
| | - Sandra Martineau
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
| | - Sarah-Eve Lemay
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
| | - Sandra Breuils-Bonnet
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
| | | | | | | | - François Potus
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
- Department of Medicine Université Laval Québec City Québec Canada
| | - Sébastien Bonnet
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
- Department of Medicine Université Laval Québec City Québec Canada
| | - Steeve Provencher
- Pulmonary Hypertension Research Group Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec Québec City Québec Canada
- Department of Medicine Université Laval Québec City Québec Canada
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Cajas D, Guajardo E, Jara-Rosales S, Nuñez C, Vargas R, Carriel V, Campos A, Milla L, Orihuela P, Godoy-Guzman C. Molecules involved in the sperm interaction in the human uterine tube: a histochemical and immunohistochemical approach. Eur J Histochem 2023; 67. [PMID: 37052420 PMCID: PMC10141343 DOI: 10.4081/ejh.2023.3513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 02/27/2023] [Indexed: 04/14/2023] Open
Abstract
In humans, even where millions of spermatozoa are deposited upon ejaculation in the vagina, only a few thousand enter the uterine tube (UT). Sperm transiently adhere to the epithelial cells lining the isthmus reservoir, and this interaction is essential in coordinating the availability of functional spermatozoa for fertilization. The binding of spermatozoa to the UT epithelium (mucosa) occurs due to interactions between cell-adhesion molecules on the cell surfaces of both the sperm and the epithelial cell. However, in humans, there is little information about the molecules involved. The aim of this study was to perform a histological characterization of the UT focused on determining the tissue distribution and deposition of some molecules associated with cell adhesion (F-spondin, galectin-9, osteopontin, integrin αV/β3) and UT's contractile activity (TNFα-R1, TNFα-R2) in the follicular and luteal phases. Our results showed the presence of galectin-9, F-spondin, osteopontin, integrin αV/β3, TNFα-R1, and TNFα-R2 in the epithelial cells in ampullar and isthmic segments during the menstrual cycle. Our results suggest that these molecules could form part of the sperm-UT interactions. Future studies will shed light on the specific role of each of the identified molecules.
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Affiliation(s)
- David Cajas
- Escuela de Medicina, Centro de Investigación Biomédica y Aplicada (CIBAP), Laboratorio de ingeniería de tejidos, Universidad de Santiago de Chile (USACH), Santiago.
| | - Emanuel Guajardo
- Facultad de Química y Biología, Laboratorio de Inmunología de la Reproducción, Universidad de Santiago de Chile (USACH); Advanced Center for Chronic Diseases (ACCDiS), Facultad de Ciencias Químicas y Farmacéuticas and Facultad de Medicina, Universidad de Chile, Santiago.
| | - Sergio Jara-Rosales
- Escuela de Obstetricia, Facultad de Ciencias para el Cuidado de la Salud, Universidad San Sebastián, Sede Los Leones, Santiago; Programa de Doctorado en Enfermedades Crónicas, Universidad San Sebastián, Sede Los Leones.
| | - Claudio Nuñez
- Servicio de Ginecología y Obstetricia, Hospital San José, Santiago.
| | - Renato Vargas
- Servicio de Ginecología y Obstetricia, Hospital San José, Santiago.
| | - Victor Carriel
- Department of Histology, Tissue Engineering Group, University of Granada, Spain; Instituto de Investigación Biosanitaria ibis.GRANADA, Granada.
| | - Antonio Campos
- Department of Histology, Tissue Engineering Group, University of Granada, Spain; Instituto de Investigación Biosanitaria ibis.GRANADA, Granada.
| | - Luis Milla
- Escuela de Medicina, Centro de Investigación Biomédica y Aplicada (CIBAP), Laboratorio de ingeniería de tejidos, Universidad de Santiago de Chile (USACH), Santiago.
| | - Pedro Orihuela
- Facultad de Química y Biología, Laboratorio de Inmunología de la Reproducción, Universidad de Santiago de Chile (USACH), Santiago.
| | - Carlos Godoy-Guzman
- Escuela de Medicina, Centro de Investigación Biomédica y Aplicada (CIBAP), Laboratorio de ingeniería de tejidos, Universidad de Santiago de Chile (USACH); Universidad de Santiago de Chile (USACH), Escuela de Medicina, Unidad de Histología, Santiago.
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Ma W, Chen K, Xiao W, Tang H, Wang S, Wang K. Evaluation of relationship between SPON1 gene and genetic susceptibility of postmenopausal osteoporosis. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2021; 48:818-823. [PMID: 32484721 DOI: 10.1080/21691401.2020.1771350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Purpose: Postmenopausal osteoporosis (PMOP) is one of systemic bone degenerative diseases characterised by decreased bone mineral density (BMD). Previous studies suggest that the SPON1 gene may be associated with BMD and play an important role in the occurrence and development of PMOP. In this study, we aimed to investigate the potential association between PMOP and the SPON1 gene.Methods: A total of 8062 postmenopausal women comprising 2684 primary PMOP patients, and 5378 healthy controls were recruited. Forty tag SNPs were selected for genotyping to evaluate the association of the SPON1 gene with PMOP and BMD. Genetic association and bioinformatics analyses were performed for PMOP.Results: SNP rs2697825 was identified to be significantly associated with the risk of PMOP at both allelic (T-statistics = -3.84, p = .0001) and genotypic levels (χ2=15.86, p = .0004). The G allele of SNP rs2697825 was significantly associated with a decreased risk of PMOP with an OR [95%] of 0.84 [0.77-0.92]. The G allele of SNP rs2697825 was associated with increased BMD at both the lumbar spine and femoral neck.Conclusions: Our results provide further evidence to support the important role for the SPON1 gene in the aetiology of PMOP, adding to the current understanding of the susceptibility to osteoporosis.
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Affiliation(s)
- Wenlong Ma
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Department of Hip Injury and Disease, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Ke Chen
- Department of Hip Injury and Disease, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Wenqing Xiao
- Department of Orthopedics, The First Hospital of Traditional Chinese Medicine, Luoyang, Henan, China
| | - Hongtao Tang
- Department of Hip Injury and Disease, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Shaohui Wang
- Department of Hip Injury and Disease, Luoyang Orthopedic Hospital of Henan Province, Luoyang, Henan, China
| | - Kunzheng Wang
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
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Guajardo-Correa E, Mena-Silva D, Diaz P, Godoy-Guzmán C, Cardenas H, Orihuela PA. 2-Methoxyoestradiol impairs mouse embryo implantation via F-spondin. Reprod Fertil Dev 2018; 31:689-697. [PMID: 30449298 DOI: 10.1071/rd18114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 10/17/2018] [Indexed: 11/23/2022] Open
Abstract
The anti-implantation effects of high oestradiol (E2) concentrations could be mediated by E2 metabolites. Herein, we examined whether 2-methoxyoestradiol (2ME) impairs embryo implantation via its target protein F-spondin. Mice on Day 3 of pregnancy were treated with E2 concomitantly with the cathecol-O-methyl transferase inhibitor OR486 and the number of implanted embryos was recorded 5 days later. The effect of 2ME or 4-methoxyoestradiol (4ME) on embryo implantation was also investigated. Plasma and uterine levels of 2ME were measured 0.5, 1 or 3h after E2 treatment while the mRNA for spondin 1 (Spon1) and F-spondin were determined in the uterus 3, 6, 12 or 24h after 2ME treatment. Finally, the effect of a neutralising F-spondin antibody on the anti-implantation effect of 2ME was explored. OR486 blocked the anti-implantation effect of E2; 2ME, but not 4ME, affected embryo implantation. The 2ME concentration was increased after 0.5 and 1h in plasma and 3h in uterine fluid following E2 treatment. 2ME increased levels of Spon1 at 12 and 24h although F-spondin was increased at 12h. F-spondin antibody blocked the effect of 2ME on embryo implantation. We conclude that 2ME impairs mouse embryo implantation via activation of F-spondin in the uterus.
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Affiliation(s)
- Emanuel Guajardo-Correa
- Laboratorio de Inmunología de la Reproducción, Facultad de Química y Biología, Universidad de Santiago de Chile
| | - Denisse Mena-Silva
- Laboratorio de Inmunología de la Reproducción, Facultad de Química y Biología, Universidad de Santiago de Chile
| | - Patricia Diaz
- Laboratorio de Inmunología de la Reproducción, Facultad de Química y Biología, Universidad de Santiago de Chile
| | - Carlos Godoy-Guzmán
- Centro de Investigación Biomédica y Aplicada (CIBAP), Escuela de Medicina, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Casilla 40, Correo 33, Chile
| | - Hugo Cardenas
- Laboratorio de Inmunología de la Reproducción, Facultad de Química y Biología, Universidad de Santiago de Chile
| | - Pedro A Orihuela
- Laboratorio de Inmunología de la Reproducción, Facultad de Química y Biología, Universidad de Santiago de Chile
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Orimoto A, Kurokawa M, Handa K, Ishikawa M, Nishida E, Aino M, Mitani A, Ogawa M, Tsuji T, Saito M. F-spondin negatively regulates dental follicle differentiation through the inhibition of TGF-β activity. Arch Oral Biol 2017; 79:7-13. [PMID: 28282516 DOI: 10.1016/j.archoralbio.2017.02.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 02/25/2017] [Accepted: 02/27/2017] [Indexed: 10/20/2022]
Abstract
OBJECTIVE F-spondin is an extracellular matrix (ECM) protein that belongs to the thrombospondin type I repeat superfamily and is a negative regulator of bone mass. We have previously shown that f-spondin is specifically expressed in the dental follicle (DF), which gives rise to the periodontal ligament (PDL) during the tooth root formation stage. To investigate the molecular mechanism of PDL formation, we investigated the function of f-spondin in DF differentiation. DESIGN The expression patterning of f-spondin in the developing tooth germ was compared with that of periodontal ligament-related genes, including runx2, type I collagen and periostin, by in situ hybridization analysis. To investigate the function of f-spondin during periodontal ligament formation, an f-spondin adenovirus was infected into the bell stage of the developing tooth germ, and the effect on dental differentiation was analyzed. RESULTS F-spondin was specifically expressed in the DF of the developing tooth germ; by contrast, type I collagen, runx2 and periostin were expressed in the DF and in the alveolar bone. F-spondin-overexpresssing tooth germ exhibited a reduction in gene expression of periostin and type I collagen in the DF. By contrast, the knockdown of f-spondin in primary DF cells increased the expression of these genes. Treatment with recombinant f-spondin protein functionally inhibited periostin expression induced by transforming growth factor-β (TGF-β). CONCLUSION Our data indicated that f-spondin inhibits the differentiation of DF cells into periodontal ligament cells by inhibiting TGF-β. These data suggested that f-spondin negatively regulates PDL differentiation which may play an important role in the immature phenotype of DF.
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Affiliation(s)
- Ai Orimoto
- Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Misaki Kurokawa
- Faculty of Industrial Science and Technology, Tokyo University of Science, Katsushika, Japan
| | - Keisuke Handa
- Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Masaki Ishikawa
- Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Eisaku Nishida
- Department of Periodontology, School of Dentistry, Aichi-gakuin University, Nagoya, Aichi, Japan
| | - Makoto Aino
- Department of Periodontology, School of Dentistry, Aichi-gakuin University, Nagoya, Aichi, Japan
| | - Akio Mitani
- Department of Periodontology, School of Dentistry, Aichi-gakuin University, Nagoya, Aichi, Japan
| | - Miho Ogawa
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology, Kobe, Hyogo, Japan
| | - Takashi Tsuji
- Laboratory for Organ Regeneration, RIKEN Center for Developmental Biology, Kobe, Hyogo, Japan
| | - Masahiro Saito
- Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan.
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6
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Dwinovan J, Colella AD, Chegeni N, Chataway TK, Sokoya EM. Proteomic analysis reveals downregulation of housekeeping proteins in the diabetic vascular proteome. Acta Diabetol 2017; 54:171-190. [PMID: 27796656 DOI: 10.1007/s00592-016-0929-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 10/07/2016] [Indexed: 02/04/2023]
Abstract
AIMS Type 2 diabetes (T2D) increases the risk of death associated with cardiovascular complications. However, a complete understanding of protein changes within the diabetic vasculature is still lacking. METHODS Herein, we utilized mass spectrometry to perform vascular and urinary proteome analysis using a rat model of high-fat feeding and low-dose streptozotocin to simulate late-stage T2D. The purpose of this study was to identify aortic and urine proteins that are differentially expressed in normal and T2D rats. RESULTS High-fat feeding and low-dose streptozotocin resulted in hyperglycemia, hypoinsulinemia and high levels of circulating free fatty acids. Using a shotgun proteomic approach, high-mobility-group protein B1 and spondin-1 were significantly increased in T2D aorta compared to control aorta, suggesting vascular inflammation and smooth muscle proliferation, respectively. However, the majority of differentially expressed aortic proteins were downregulated in T2D, including proteins associated with coagulation, cell differentiation and redox homeostasis. Strikingly, we report a significant downregulation of commonly used cytoskeletal housekeeping proteins in T2D aorta. Urine from T2D rats displayed increased expression of proteins involved in inflammation and oxidative stress and decreased expression of proteins associated with lipid metabolism and cell adhesion. A number of differentially expressed proteins in urine of T2D rats have previously been reported in human T2D, thereby supporting this animal model as a good representation of human T2D. CONCLUSIONS Our data offer new information regarding key pathways that could be therapeutically targeted to combat the cardiovascular complications of T2D.
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Affiliation(s)
- Josua Dwinovan
- Discipline of Human Physiology, School of Medicine, Flinders University, Room 4E 432, Flinders Medical Centre, Flinders Drive, Bedford Park, SA, 5042, Australia
| | - Alexander D Colella
- Discipline of Human Physiology, School of Medicine, Flinders University, Room 4E 432, Flinders Medical Centre, Flinders Drive, Bedford Park, SA, 5042, Australia
| | - Nusha Chegeni
- Discipline of Human Physiology, School of Medicine, Flinders University, Room 4E 432, Flinders Medical Centre, Flinders Drive, Bedford Park, SA, 5042, Australia
| | - Timothy K Chataway
- Discipline of Human Physiology, School of Medicine, Flinders University, Room 4E 432, Flinders Medical Centre, Flinders Drive, Bedford Park, SA, 5042, Australia
| | - Elke M Sokoya
- Discipline of Human Physiology, School of Medicine, Flinders University, Room 4E 432, Flinders Medical Centre, Flinders Drive, Bedford Park, SA, 5042, Australia.
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Alowolodu O, Johnson G, Alashwal L, Addou I, Zhdanova IV, Uversky VN. Intrinsic disorder in spondins and some of their interacting partners. INTRINSICALLY DISORDERED PROTEINS 2016; 4:e1255295. [PMID: 28232900 DOI: 10.1080/21690707.2016.1255295] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 10/22/2016] [Accepted: 10/27/2016] [Indexed: 12/28/2022]
Abstract
Spondins, which are proteins that inhibit and promote adherence of embryonic cells so as to aid axonal growth are part of the thrombospondin-1 family. Spondins function in several important biological processes, such as apoptosis, angiogenesis, etc. Spondins constitute a thrombospondin subfamily that includes F-spondin, a protein that interacts with Aβ precursor protein and inhibits its proteolytic processing; R-spondin, a 4-membered group of proteins that regulates Wnt pathway and have other functions, such as regulation of kidney proliferation, induction of epithelial proliferation, the tumor suppressant action; M-spondin that mediates mechanical linkage between the muscles and apodemes; and the SCO-spondin, a protein important for neuronal development. In this study, we investigated intrinsic disorder status of human spondins and their interacting partners, such as members of the LRP family, LGR family, Frizzled family, and several other binding partners in order to establish the existence and importance of disordered regions in spondins and their interacting partners by conducting a detailed analysis of their sequences, finding disordered regions, and establishing a correlation between their structure and biological functions.
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Affiliation(s)
- Oluwole Alowolodu
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida , Tampa, FL, USA
| | - Gbemisola Johnson
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida , Tampa, FL, USA
| | - Lamis Alashwal
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida , Tampa, FL, USA
| | - Iqbal Addou
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida , Tampa, FL, USA
| | - Irina V Zhdanova
- Department of Anatomy & Neurobiology, Boston University School of Medicine , Boston, MA, USA
| | - Vladimir N Uversky
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, USA; USF Health Byrd Alzheimer Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, USA; Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
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Hu H, Xin N, Liu J, Liu M, Wang Z, Wang W, Zhang Q, Qi J. Characterization of F-spondin in Japanese flounder (Paralichthys olivaceus) and its role in the nervous system development of teleosts. Gene 2015; 575:623-31. [PMID: 26390814 DOI: 10.1016/j.gene.2015.09.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 09/16/2015] [Indexed: 12/21/2022]
Abstract
F-spondin was originally isolated from the developing embryonic floor plate of vertebrates, secreting numerous kinds of neuron-related molecules. The protein performs a positive function in nervous system development, which is attributed to the high conservation of F-spondin protein, an extracellular matrix (ECM) protein in several species. However, its precise function remains unknown, especially in marine fish. In this study, the F-spondin of Japanese flounder (Paralichthys olivaceus). was cloned, and its expression pattern and structural characteristics were analyzed. The 2421bp-long cDNA ORF of PoF-spondin was obtained and divided into 14 exons spread over 61,496bp of the genomic sequence. Phylogenetic analysis showed that PoF-spondin was actually the ortholog of the human spon1 gene and shared high identities with other teleost spon1a genes. Quantitative RT-PCR analysis showed that PoF-spondin was maternally expressed, and transcripts were present from one-cell stage to hatching stage, peaking at tailbud stage. Tissue distribution analysis indicated that PoF-spondin was detectable mainly in the gonads (especially in the ovary) and the brain. Whole mount in situ hybridization analysis revealed that the PoF-spondin transcription distributed throughout the cleavage of the ball in the early stage and expressed at a high level in the floor plate of the trunk at tailbud and pre-hatching stages. Furthermore, the expression of genes related to nervous system development (spon1b, foxo3b, and foxj1a) was significantly increased after the injection of PoF-spondin into the embryos of wild-type zebrafish. Furthermore, PoF-spondin significantly suppressed the expression of the chordamesoderm marker gene ntl, increased the expression of otx2/krox20, ectoderm mark genes, and left the expression of dorsal mesodermal marker gene gsc unaffected at 50% epiboly stage in zebrafish. In short, our results suggest that PoF-spondin functions in the development of the teleost nervous system.
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Affiliation(s)
- Hongshuang Hu
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Nian Xin
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Jinxiang Liu
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Mengmeng Liu
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Zhenwei Wang
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Wenji Wang
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Quanqi Zhang
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China
| | - Jie Qi
- Key Laboratory of Marine Genetics and Breeding, Ocean University of China, 266003 Qingdao, Shandong, China.
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Chang H, Dong T, Ma X, Zhang T, Chen Z, Yang Z, Zhang Y. Spondin 1 promotes metastatic progression through Fak and Src dependent pathway in human osteosarcoma. Biochem Biophys Res Commun 2015; 464:45-50. [DOI: 10.1016/j.bbrc.2015.05.092] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 05/28/2015] [Indexed: 10/23/2022]
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10
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Mindin regulates vascular smooth muscle cell phenotype and prevents neointima formation. Clin Sci (Lond) 2015; 129:129-45. [PMID: 25751394 DOI: 10.1042/cs20140679] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In the present study, using diverse in vitro and in vivo models, we revealed that mindin is a novel modulator of VSMC phenotype and neointima formation in an AKT-dependent manner in response to vascular injury.
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11
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Oka H, Kitagawa M, Takata T. F-spondin inhibits differentiation of clastic precursors via lipoprotein receptor-related protein 8 (LRP8). J Periodontol 2014; 86:465-72. [PMID: 25299387 DOI: 10.1902/jop.2014.140419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND F-spondin, known to be a secreted neuronal glycoprotein, is highly expressed on the tooth root surface. The authors previously reported that F-spondin is one of the specific markers of cementoblasts in periodontal tissue. In chronic periodontitis, significant cemental resorption rarely occurs on the root side, although alveolar bone resorption by osteoclasts is one of the major pathologic changes. Thus, it was hypothesized that secretory F-spondin from cementoblasts might be involved in differentiation of clastic cells on the root surface. The authors studied effects of secretory F-spondin from F-spondin-expressing cells and its pathway on receptor activator of nuclear factor-κB ligand (RANKL)-mediated differentiation of clastic cells. METHODS Osteoclast precursors were used in this study. With a chamber assay, the authors examined effects of secretory molecules from F-spondin-expressing cells of transgenic mice on RANKL-induced clastic cell differentiation. RESULTS Secretory molecules from F-spondin-overexpressing cells significantly inhibited the RANKL-mediated tartrate-resistant acid phosphatase (TRAP)-positive cells from primary progenitor cells with the chamber system. F-spondin suppressed RANKL-mediated nuclear factor of activated T-cells, cytoplasmic 1 (NFATc1); TRAP; cathepsin K; and dendritic cell-specific transmembrane protein (DC-STAMP) expression in the cells. The suppressive effect of F-spondin on RANKL-induced differentiation of clastic cells was partially blocked by knockdown of low-density lipoprotein receptor-related protein 8 (LRP8). CONCLUSIONS These findings indicate that secretory factors from F-spondin-expressing cells, including F-spondin, downregulate differentiation of clastic precursors. Moreover, F-spondin inhibits RANKL-mediated differentiation of clastic cells partially via LRP8. It is suggested that secretory F-spondin may act protectively from cemental resorption partially via LRP8 in periodontal tissue.
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Affiliation(s)
- Hiroko Oka
- Department of International Collaboration Development for Dentistry, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Palmer GD, Attur MG, Yang Q, Liu J, Moon P, Beier F, Abramson SB. F-spondin deficient mice have a high bone mass phenotype. PLoS One 2014; 9:e98388. [PMID: 24875054 PMCID: PMC4038615 DOI: 10.1371/journal.pone.0098388] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 05/02/2014] [Indexed: 01/30/2023] Open
Abstract
F-spondin is a pericellular matrix protein upregulated in developing growth plate cartilage and articular cartilage during osteoarthritis. To address its function in bone and cartilage in vivo, we generated mice that were deficient for the F-spondin gene, Spon1. Spon1−/− mice were viable and developed normally to adulthood with no major skeletal abnormalities. At 6 months, femurs and tibiae of Spon1−/− mice exhibited increased bone mass, evidenced by histological staining and micro CT analyses, which persisted up to 12 months. In contrast, no major abnormalities were observed in articular cartilage at any age group. Immunohistochemical staining of femurs and tibiae revealed increased levels of periostin, alkaline phosphate and tartrate resistant acid phosphatase (TRAP) activity in the growth plate region of Spon1−/− mice, suggesting elevated bone synthesis and turnover. However, there were no differences in serum levels of TRAP, the bone resorption marker, CTX-1, or osteoclast differentiation potential between genotypes. Knockout mice also exhibited reduced levels of TGF-β1 in serum and cultured costal chondrocytes relative to wild type. This was accompanied by increased levels of the BMP-regulatory SMADs, P-SMAD1/5 in tibiae and chondrocytes. Our findings indicate a previously unrecognized role for Spon1 as a negative regulator of bone mass. We speculate that Spon1 deletion leads to a local and systemic reduction of TGF-β levels resulting in increased BMP signaling and increased bone deposition in adult mice.
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Affiliation(s)
- Glyn D Palmer
- Division of Rheumatology, New York University School of Medicine and NYU Hospital for Joint Diseases, New York, New York, United States of America
| | - Mukundan G Attur
- Division of Rheumatology, New York University School of Medicine and NYU Hospital for Joint Diseases, New York, New York, United States of America
| | - Qing Yang
- Division of Rheumatology, New York University School of Medicine and NYU Hospital for Joint Diseases, New York, New York, United States of America
| | - James Liu
- Division of Rheumatology, New York University School of Medicine and NYU Hospital for Joint Diseases, New York, New York, United States of America
| | - Paxton Moon
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, Ontario, Canada
| | - Frank Beier
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, Ontario, Canada
| | - Steven B Abramson
- Division of Rheumatology, New York University School of Medicine and NYU Hospital for Joint Diseases, New York, New York, United States of America
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Ray P, Zheng L, Lucas J, Carin L. Bayesian joint analysis of heterogeneous genomics data. Bioinformatics 2014; 30:1370-6. [DOI: 10.1093/bioinformatics/btu064] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Rincón-Rodríguez RJ, Oróstica ML, Díaz P, Reuquén P, Cárdenas H, Orihuela PA. Changes in the gene expression pattern induced by 2-methoxyestradiol in the mouse uterus. Endocrine 2013; 44:773-83. [PMID: 23494413 DOI: 10.1007/s12020-013-9921-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 03/04/2013] [Indexed: 10/27/2022]
Abstract
2-Methoxyestradiol (2ME) is an estrogen metabolite with antitumor and antiangiogenic properties, although their effects on the reproductive tissues are not well-determined. Furthermore, it is not very clear whether 2ME is part of the intracellular signaling of estradiol (E2) or it acts through other signaling pathways. The purpose of this study was to determine changes in the gene expression pattern in the mouse female reproductive tract induced by 2ME, under conditions in which this metabolite has no estrogenic activity. Therefore, we first compared the effect of 2ME or E2 on the uterine weight and epithelial cell height, and on the ovarian weight and the number of follicles of immature mice. Then, we examined the gene expression profile in the uterus of immature mice treated with 2ME or E2 and we selected three genes scd2, snx6, and spon1, to confirm differential regulation by E2 and 2ME in the uterine cells using real-time PCR. Finally, in order to explore the physiologic relevance of the 2ME-induced genes we determined the expression and localization of the F-spondin protein encoded by spon1 in the uterus of mature mice treated with E2 or 2ME. Estradiol and 2ME reduced the ovarian weight and decreased the number of follicles ≥ 300 μm, whereas E2 increased the uterine weight and epithelial cell height but not 2ME, indicating that 2ME did not have estrogenic activity in the mouse uterus. Microarray analysis showed that 1.8 % of the uterine genes were regulated by E2 and 0.23 % by 2ME, while 0.04 % was regulated by E2 and 2ME. The mRNA for scd2 was exclusively increased by 2ME, whereas snx6 and spon1 were up-regulated by E2 and 2ME, but the response to 2ME was more intense. F-spondin was mainly expressed in the uterine stroma layer although 2ME or E2 did not change its localization in the uterine cells. We conclude that 2ME regulates a group of genes in the mice uterus, independently of estrogenic activity, suggesting a functional involvement of 2ME in the mammalian uterus.
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Affiliation(s)
- Ramiro J Rincón-Rodríguez
- Laboratorio de Inmunología de la Reproducción, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda 3363, Casilla 40, Correo 33, Santiago, Chile
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Trisolini C, Albrizio M, Roscino MT, Pantaleo M, Rizzo A, Sciorsci RL. Leptin and queen ovary: new insights about ovulation. Res Vet Sci 2012; 94:707-10. [PMID: 23261151 DOI: 10.1016/j.rvsc.2012.11.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Revised: 09/27/2012] [Accepted: 11/22/2012] [Indexed: 10/27/2022]
Abstract
Leptin has been proven to be crucial in the ovulatory process. Aims of this study are to assess the expression of leptin receptor (Ob-R) in the ovaries of queens at estrus and to evaluate the capability of leptin in modulating ovarian contractility in vitro. Right ovaries underwent immunoblot analysis. Left ovaries were mounted in an organ bath under physiological condition and exposed to murine leptin (10(-6) M). Immunoblot analysis showed that the queen ovary expresses leptin receptor at estrus. Leptin at the dose of 10(-6) M significantly reduced the contractile activity of the ovary. The presence of ovarian Ob-R and leptin inhibitory effects on ovarian contractility suggest leptin implication in the modulation of ovarian activity, as well as in ovulatory disorders.
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Affiliation(s)
- C Trisolini
- Department of Emergency and Organs Transplantations, University of Bari Aldo Moro, Italy
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16
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F-spondin regulates the differentiation of human cementoblast-like (HCEM) cells via BMP7 expression. Biochem Biophys Res Commun 2012; 418:229-33. [PMID: 22244873 DOI: 10.1016/j.bbrc.2011.12.155] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 12/31/2011] [Indexed: 11/22/2022]
Abstract
Cementum plays an important role in the attachment of connective tissue to the root surface. However, the detailed mechanism of cementum formation has not yet been clarified. We previously established human cementoblast-like cell lines (HCEM) and human periodontal ligament cell lines (HPL) by infection of hTERT gene. Using those cell lines, we compared the gene expression of them and identified F-spondin as a cementoblast specific gene. In this study, to clarify the role of F-spondin in the differentiation of periodontal ligament cells to cementoblasts, we compared the gene expression of F-spondin-overexpressed HPL (HPL-spondin) cells with HPL parent cells. We found that several genes expressed higher level in HPL-spondin cells than in HPL cells, such as heparin sulfate 6-sulfotranferase, calcitonin-related polypeptide beta, bone morphogenetic proteins 7 (BMP7), BMP2 and BMP8B. Among those genes, we focused on BMP7 and examined the interaction between F-spondin and BMP7, because BMP7 was reported to enhance cementoblast function. Moreover, we further examined the effect of BMP7 peptide on the expression of mineralization-associated genes in HCEM cells. RT-PCR and real-time PCR analyses showed that HPL-spondin expressed BMP7, but not HPL cells. And BMP7 and phospho-Smad1/5/8 protein production were detected in HPL-spondin by Western blot. siSPON1 inhibited expression of type I collagen, runt-related transcription factor 2 (RUNX2) and bone sialoprotein (BSP) mRNA in HCEM cells. And the mineralization tended to be decreased in siSPON1 treated cells by ALZ staining and the quantification analysis. Moreover, we examined the effect of BMP7 peptide on the gene expressions of HCEM cells by RT-PCR. Increase of the osteopontin and BSP mRNA was observed in BMP7 treated HCEM cells. These findings indicate that F-spondin regulates the differentiation of HCEM cells via BMP7 expression.
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Tan K, Lawler J. The structure of the Ca²+-binding, glycosylated F-spondin domain of F-spondin - A C2-domain variant in an extracellular matrix protein. BMC STRUCTURAL BIOLOGY 2011; 11:22. [PMID: 21569239 PMCID: PMC3117680 DOI: 10.1186/1472-6807-11-22] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 05/10/2011] [Indexed: 11/12/2022]
Abstract
Background F-spondin is a multi-domain extracellular matrix (ECM) protein and a contact-repellent molecule that directs axon outgrowth and cell migration during development. The reelin_N domain and the F-spondin domain (FS domain) comprise a proteolytic fragment that interacts with the cell membrane and guides the projection of commissural axons to floor plate. The FS domain is found in F-spondins, mindins, M-spondin and amphiF-spondin. Results We present the crystal structure of human F-spondin FS domain at 1.95Å resolution. The structure reveals a Ca2+-binding C2 domain variant with an 8-stranded antiparallel β-sandwich fold. Though the primary sequences of the FS domains of F-spondin and mindin are less than 36% identical, their overall structures are very similar. The unique feature of F-spondin FS domain is the presence of three disulfide bonds associated with the N- and C-termini of the domain and a highly conserved N-linked glycosylation site. The integrin-binding motif found in mindin is not conserved in the F-spondin FS domain. Conclusion The structure of the F-spondin FS domain completes the structural studies of the multiple-domain ECM molecule. The homology of its core structure to a common Ca2+- and lipid-binding C2 domain suggests that the F-spondin FS domain may be responsible for part of the membrane targeting of F-spondin in its regulation of axon development. The structural properties of the FS domain revealed in this study pave the way for further exploration into the functions of F-spondin.
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Affiliation(s)
- Kemin Tan
- Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Argonne National Laboratory, Argonne, IL 60439, USA.
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Shati A, Elsaid F, Hafez E. Biochemical and molecular aspects of aluminium chloride-induced neurotoxicity in mice and the protective role of Crocus sativus L. extraction and honey syrup. Neuroscience 2011; 175:66-74. [DOI: 10.1016/j.neuroscience.2010.11.043] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 10/16/2010] [Accepted: 11/21/2010] [Indexed: 10/18/2022]
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Banerjee D. Recent Advances in the Pathobiology of Hodgkin's Lymphoma: Potential Impact on Diagnostic, Predictive, and Therapeutic Strategies. Adv Hematol 2011; 2011:439456. [PMID: 21318045 PMCID: PMC3034907 DOI: 10.1155/2011/439456] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 10/04/2010] [Accepted: 11/12/2010] [Indexed: 12/20/2022] Open
Abstract
From its first description by Thomas Hodgkin in 1832, Hodgkin's disease, now called Hodgkin's lymphoma, has continued to be a fascinating neoplasm even to this day. In this review, historical aspects, epidemiology, diagnosis, tumor biology, new observations related to host-microenvironment interactions, gene copy number variation, and gene expression profiling in this complex neoplasm are described, with an exploration of chemoresistance mechanisms and potential novel therapies for refractory disease.
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Affiliation(s)
- Diponkar Banerjee
- Centre for Translational and Applied Genomics (CTAG), Department of Pathology, British Columbia Cancer Agency (BCCA), 600 West 10th Avenue, Vancouver, British Columbia, Canada V5Z 4E6
- Department of Pathology and Laboratory Medicine, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada V6T 2B5
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Ishikawa I, Iwata T, Washio K, Okano T, Nagasawa T, Iwasaki K, Ando T. Cell sheet engineering and other novel cell-based approaches to periodontal regeneration. Periodontol 2000 2010; 51:220-38. [PMID: 19878477 DOI: 10.1111/j.1600-0757.2009.00312.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Ueda M, Terai Y, Kanda K, Kanemura M, Takehara M, Futakuchi H, Yamaguchi H, Yasuda M, Nishiyama K, Ueki M. Tumor Angiogenesis and Molecular Target Therapy in Ovarian Carcinomas. Hum Cell 2008; 18:1-16. [PMID: 16130895 DOI: 10.1111/j.1749-0774.2005.tb00052.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Growth of solid tumors depends on angiogenesis, the process by which new blood vessels develop from the endothelium of a pre-existing vasculature. Tumors promote angiogenesis by secreting various angiogeneic factors, and newly formed blood vessels induce tumor cell proliferation and invasiveness. Ovarian carcinomas have a poor prognosis, often associated with multifocal intraperitoneal dissemination accompanied by intense neovascularization. The degree of angiogenesis of ovarian carcinomas may directly influence the clinical course of the disease. Although a growing body of evidence indicates that angiogenic intensity may play a prognostic role in gynecological malignancies including ovarian carcinomas, the related biological mechanisms remain to be further elucidated. In this review, we describe current knowledge pertaining to mechanisms and regulation of angiogenesis in ovarian carcinomas with special reference to our recent research results.
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Affiliation(s)
- Masatsugu Ueda
- Department of Obstetrics and Gynecology, Osaka Medical College, 2-7 Daigakumachi, Takatsuki, Osaka 569-8686, Japan.
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Györffy B, Dietel M, Fekete T, Lage H. A snapshot of microarray-generated gene expression signatures associated with ovarian carcinoma. Int J Gynecol Cancer 2008; 18:1215-33. [DOI: 10.1111/j.1525-1438.2007.01169.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
It was hypothesized that analysis of global gene expression in ovarian carcinoma can identify dysregulated genes that can serve as molecular markers and provide further insight into carcinogenesis and provide the basis for development of new diagnostic tools as well as new targeted therapy protocols. By applying bioinformatics tools for screening of biomedical databases, a gene expression profile databank, specific for ovarian carcinoma, was constructed with utilizable data sets published in 28 studies that applied different array technology platforms. The data sets were divided into four compartments: (i) genes associated with carcinogenesis: in 14 studies, 1881 genes were extracted, 75 genes were identified in more than one study, and only 4 genes (PRKCBP1, SPON1, TACSTD1, and PTPRM) were identified in three studies. (ii) Genes associated with histologic subtypes: in four studies, 463 genes could be identified, but none of them was identified in more than a single study. (iii) Genes associated with therapy response: in seven studies, 606 genes were identified from which 38 were differentially regulated in at least two studies, 3 genes (TMSB4X, GRN, and TJP1) in three studies, and 1 gene (IFITM1) in four studies. (iv) Genes associated with prognosis and progression: 254 genes were found in seven studies. From these genes, merely three were identified in at least two different studies. This snapshot of available gene expression data not only provides independently described potential diagnostic and therapeutic targets for ovarian carcinoma but also emphasizes the drawbacks of the current state of global gene expression analyses in ovarian cancer.
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The crystal structure of the heparin-binding reelin-N domain of f-spondin. J Mol Biol 2008; 381:1213-23. [PMID: 18602404 PMCID: PMC2561254 DOI: 10.1016/j.jmb.2008.06.045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Revised: 06/10/2008] [Accepted: 06/18/2008] [Indexed: 01/07/2023]
Abstract
The extracellular matrix protein F-spondin mediates axon guidance during neuronal development. Its N-terminal domain, termed the reelin-N domain, is conserved in F-spondins, reelins, and other extracellular matrix proteins. In this study, a recombinant human reelin-N domain has been expressed, purified, and shown to bind heparin. The crystal structure of the reelin-N domain resolved to 2.0 A reveals a variant immunoglobulin-like fold and potential heparin-binding sites. Substantial conformational variations even in secondary structure are observed between the two chemically identical reelin-N domains in one crystallographic asymmetric unit. The variations may result from extensive, highly specific interactions across the interface of the two reelin-N domains. The calculated values of buried surface area and the interface's shape complementarity are consistent with the formation of a weak dimer. The homophilic asymmetric dimer can potentially offer advantages in binding to ligands such as glycosaminoglycans, which may, in turn, bridge the two reelin-N domains and stabilize the dimer.
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Svensson P, Williams C, Lundeberg J, Rydén P, Bergqvist I, Edlund H. Gene array identification of Ipf1/Pdx1-/- regulated genes in pancreatic progenitor cells. BMC DEVELOPMENTAL BIOLOGY 2007; 7:129. [PMID: 18036209 PMCID: PMC2212654 DOI: 10.1186/1471-213x-7-129] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Accepted: 11/23/2007] [Indexed: 01/29/2023]
Abstract
Background The homeodomain transcription factor IPF1/PDX1 exerts a dual role in the pancreas; Ipf1/Pdx1 global null mutants fail to develop a pancreas whereas conditional inactivation of Ipf1/Pdx1 in β-cells leads to impaired β-cell function and diabetes. Although several putative target genes have been linked to the β-cell function of Ipf1/Pdx1, relatively little is known with respect to genes regulated by IPF1/PDX1 in early pancreatic progenitor cells. Results Microarray analyses identified a total of 111 genes that were differentially expressed in e10.5 pancreatic buds of Ipf1/Pdx1-/- embryos. The expression of one of these, Spondin 1, which encodes an extracellular matrix protein, has not previously been described in the pancreas. Quantitative real-time RT-PCR analyses and immunohistochemical analyses also revealed that the expression of FgfR2IIIb, that encodes the receptor for FGF10, was down-regulated in Ipf1/Pdx1-/- pancreatic progenitor cells. Conclusion This microarray analysis has identified a number of candidate genes that are differentially expressed in Ipf1/Pdx1-/- pancreatic buds. Several of the differentially expressed genes were known to be important for pancreatic progenitor cell proliferation and differentiation whereas others have not previously been associated with pancreatic development.
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Affiliation(s)
- Per Svensson
- Umeå Center for Molecular Medicine, Umeå University, SE-901 87 Umeå, Sweden.
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Ohnuma K, Kaneko H, Noguchi J, Kikuchi K, Ozawa M, Hasegawa Y. Isolation and Identification of F-Spondin in the Boar Testis and Its Production During Testis Growth. J Reprod Dev 2007; 53:151-8. [PMID: 17043384 DOI: 10.1262/jrd.18090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
F-spondin/vascular smooth muscle cell growth-promoting factor (VSGP), purified from the follicular fluid of adult bovine ovaries, has been identified as a promoter of neuronal differentiation and vascular smooth muscle growth. The objectives of the present study were (1) to clarify whether F-spondin is also produced in the testis, which is ontogenically equivalent to the ovary, and (2) to examine whether production of this protein changes with testicular growth. To isolate F-spondin from the testis, testicular homogenates obtained from 8-week-old boars were sequentially subjected to heparin-Sepharose chromatography, diethylaminoethyl (DEAE)-Sepharose chromatography, and reverse-phase high-performance liquid chromatography (RP-HPLC). The isolated protein had a molecular mass of approximately 110 kDa and was cross-reactive with anti-F-spondin antibody by Western blotting. The purified protein was further characterized by amino acid sequence analysis of its internal peptide. The sequence obtained was GEQCNIVPDN VD, and a homology search indicated that the purified protein is a homologue of rat, human, and bovine F-spondin. By fractionation of the same amounts of testis tissue obtained from 1-, 8-, 16-, and 40-week-old boars, we analyzed age-related production of F-spondin in the testis. Western blotting of the fractions obtained from RP-HPLC revealed the presence of a band at approximately 110 kDa, corresponding to F-spondin, in the testes obtained from boars between 1 and 16 weeks old, but this band was not detected at 40 weeks. These results clearly indicate that (1) the porcine testis produces F-spondin and that (2) production of this protein is evident in the immature porcine testis, but not the adult testis.
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Affiliation(s)
- Katsuhiko Ohnuma
- Reproductive Biology Research Unit (Kannondai), National Institute of Agrobiological Science, Ibaraki, Japan
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Pääkkönen K, Tossavainen H, Permi P, Rakkolainen H, Rauvala H, Raulo E, Kilpeläinen I, Güntert P. Solution structures of the first and fourth TSR domains of F-spondin. Proteins 2006; 64:665-72. [PMID: 16736493 DOI: 10.1002/prot.21030] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
F-spondin is a protein mainly associated with neuronal development. It attaches to the extracellular matrix and acts in the axon guidance of the developing nervous system. F-spondin consists of eight domains, six of which are TSR domains. The TSR domain family binds a wide range of targets. Here we present the NMR solution structures of TSR1 and TSR4. TSR domains have an unusual fold that is characterized by a long, nonglobular shape, consisting of two beta-strands and one irregular extended strand. Three disulfide bridges and stack of alternating tryptophan and arginine side-chains stabilize the structure. TSR1 and TSR4 structures are similar to each other and to the previously determined TSR domain X-ray structures from another protein, TSP, although TSR4 exhibits a mobile loop not seen in other structures.
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Affiliation(s)
- Kimmo Pääkkönen
- Tatsuo Miyazawa Memorial Program, RIKEN Genomic Sciences Center, Yokohama, Japan
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Lee SR, Pharr GT, Cooksey AM, McCarthy FM, Boyd BL, Pinchuk LM. Differential detergent fractionation for non-electrophoretic bovine peripheral blood monocyte proteomics reveals proteins involved in professional antigen presentation. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2006; 30:1070-83. [PMID: 16566999 DOI: 10.1016/j.dci.2006.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2005] [Revised: 02/08/2006] [Accepted: 02/09/2006] [Indexed: 05/08/2023]
Abstract
Professional antigen presenting cells (APC), dendritic cells (DC) and their myeloid progenitors, monocytes/macrophages are critical controllers of innate and adaptive immunity. Here we show that differential detergent fractionation (DDF) analysis of bovine monocytes reveals proteins related to antigen pattern recognition, uptake and presentation to immunocompetent lymphocytes. We identify 53 bovine proteins involved in immune function of professional APC. In particular, 13 adhesion molecules, three toll-like receptors (TLR1, 6 and 8), three antigen uptake-related proteins (including mannose receptor [MR] precursor), and eight actin-like proteins involved in active endocytosis were identified. In addition, MHC class I and II-related proteins, cytokines, active substances and growth factors have been identified. We conclude that the DDF approach can provide interpretable and meaningful functional information concerning protein expression profiles associated with monocyte activation, transformation into macrophages and/or immature DC, and maturation of monocyte-derived DC in the presence of multiple bovine pathogens.
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Affiliation(s)
- S-R Lee
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762-6100, USA
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Pyle-Chenault RA, Stolk JA, Molesh DA, Boyle-Harlan D, McNeill PD, Repasky EA, Jiang Z, Fanger GR, Xu J. VSGP/F-spondin: a new ovarian cancer marker. Tumour Biol 2005; 26:245-57. [PMID: 16103746 DOI: 10.1159/000087379] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2005] [Accepted: 04/22/2005] [Indexed: 01/03/2023] Open
Abstract
The discovery of genes that are overexpressed in ovarian cancers provides valuable insight into ovarian cancer biology and will lead to the development of more effective treatment strategies for combating this disease. To identify genes exhibiting ovarian- and ovarian cancer-specific expression, we generated four subtracted cDNA libraries from primary and metastatic ovarian adenocarcinoma tissues. 3,400 cDNA clones from these libraries were analyzed by microarray for tissue distribution and tumor specificity using 32 pairs of fluorophore-labeled cDNA samples from a variety of normal tissues and ovarian tumor tissues. cDNA clones showing elevated expression in ovarian tumors were identified by DNA sequencing with comparison to public databases, and the most promising candidates were further analyzed by quantitative real-time polymerase chain reaction and Northern blot. This systematic approach led to the identification of a number of genes including vascular smooth muscle growth-promoting factor (VSGP/F-spondin), a secreted protein previously identified and cloned from bovine and human ovary. VSGP/F-spondin protein was observed in ovarian carcinomas but not in normal ovarian epithelium by immunohistochemistry with a VSGP/F-spondin antibody. The expression profile of VSGP/F-spondin identifies this molecule as a potential diagnostic marker or target for developing therapeutic strategies to treat ovarian carcinoma.
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Daston GP, Naciff JM. Gene expression changes related to growth and differentiation in the fetal and juvenile reproductive system of the female rat: evaluation of microarray results. Reprod Toxicol 2005; 19:381-94. [PMID: 15686872 DOI: 10.1016/j.reprotox.2004.09.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2004] [Revised: 08/30/2004] [Accepted: 09/01/2004] [Indexed: 12/22/2022]
Abstract
Microarrays make it possible to evaluate the responses of a major fraction of the genome in response to physiological perturbation or exogenous insult. This represents a huge advance in our ability to detect changes in gene expression that may be responsible for physiological or toxicological responses. Our laboratory is interested in the effects of estrogens on female reproductive system development and function. We have evaluated the changes in gene expression in response to estrogens in the female reproductive tract of rats during embryo/fetal development and in the juvenile rat (which is capable of mounting a uterotrophic response). The results of these experiments indicate that a number of genes (dozens to hundreds) are changed in a reproducible, dose-related manner in response to estrogens. These results have been published elsewhere; the purpose of this review is to evaluate, based on information from the literature, the potential role of selected genes on processes of cell proliferation and differentiation, and to suggest plausible relationships among these genes in eliciting responses at the tissue or organ level. We also discuss the utility of gene-expression experiments in elucidating the shape of the dose-response curve at low doses. In particular, we show that the dose-response for gene expression in the juvenile rat uterus is monotonic down to levels a few orders of magnitude below the NOEL for a uterotrophic response, suggesting that gene expression (and by inference higher order responses) do not follow patterns that are unpredictable based on response at higher dosages.
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Affiliation(s)
- George P Daston
- Miami Valley Laboratories, The Procter and Gamble Company, P.O. Box 538707, Cincinnati, OH 45253, USA.
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Ho A, Südhof TC. Binding of F-spondin to amyloid-beta precursor protein: a candidate amyloid-beta precursor protein ligand that modulates amyloid-beta precursor protein cleavage. Proc Natl Acad Sci U S A 2004; 101:2548-53. [PMID: 14983046 PMCID: PMC356987 DOI: 10.1073/pnas.0308655100] [Citation(s) in RCA: 154] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Amyloid-beta precursor protein (APP), a type I membrane protein, is physiologically processed by alpha- or beta-secretases that cleave APP N-terminal to the transmembrane region. Extracellular alpha-/beta-cleavage of APP generates a large secreted N-terminal fragment, and a smaller cellular C-terminal fragment. Subsequent gamma-secretase cleavage in the transmembrane region of the C-terminal fragment induces secretion of small extracellular peptides, including Abeta40 and Abeta42, which are instrumental in the pathogenesis of Alzheimer's disease, and intracellular release of a cytoplasmic tail fragment. Although APP resembles a cell-surface receptor, no functionally active extracellular ligand for APP that might regulate its proteolytic processing has been described. We now show that F-spondin, a secreted signaling molecule implicated in neuronal development and repair, binds to the conserved central extracellular domain of APP and inhibits beta-secretase cleavage of APP. Our data indicate that F-spondin may be an endogenous regulator of APP cleavage, and suggest that the extracellular domains of APP are potential drug targets for interfering with beta-secretase cleavage.
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Affiliation(s)
- Angela Ho
- The Center for Basic Neuroscience, Department of Molecular Genetics, and Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, NA4.118, Dallas, TX 75390-9111, USA
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