1
|
Zhao X, Xie Z, Rao N, Zhang S, Zhang Y. Effect of dermatopontin on osteogenic differentiation of periodontal ligament stem cells. Gene 2023; 858:147185. [PMID: 36632910 DOI: 10.1016/j.gene.2023.147185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 01/11/2023]
Abstract
Human periodontal ligament stem cells (hPDLSCs) are promising seed cells for oral bone tissue engineering. Dermatopontin (DPT) is a small-molecule protein recognized as a non-collagenous component of the extracellular matrix and is associated with a variety of biological processes. In this study, we first determined that DPT was elevated during the osteogenic differentiation of hPDLSCs. HPDLSCs interfering with DPT expression were established by lentiviral infection. It was found that the proliferation and osteogenic differentiation ability of hPDLSCs were inhibited after interfering DPT with lentivirus. Exogenous recombinant DPT treatment could not alter the proliferation of hPDLSCs. Coincidentally, exogenous DPT can only enhance the osteogenic differentiation of hPDLSCs in the control lentivirus group, but had no significant effect on the DPT interference group. This study expands the understanding of DPT function and implicates DPT as an important target for enhancing osteogenic differentiation of hPDLSCs.
Collapse
Affiliation(s)
- Xuechun Zhao
- Department of Oral Implantology, School and Hospital of Stomatology, Kunming Medical University, Kunming, PR China; Yunnan Key Laboratory of Stomatology, Kunming, PR China
| | - Zhigang Xie
- Department of Oral Implantology, School and Hospital of Stomatology, Kunming Medical University, Kunming, PR China; Yunnan Key Laboratory of Stomatology, Kunming, PR China
| | - Nanquan Rao
- Department of Oral Implantology, School and Hospital of Stomatology, Kunming Medical University, Kunming, PR China; Yunnan Key Laboratory of Stomatology, Kunming, PR China
| | - Shu Zhang
- Department of Oral Implantology, School and Hospital of Stomatology, Kunming Medical University, Kunming, PR China; Yunnan Key Laboratory of Stomatology, Kunming, PR China
| | - Yunpeng Zhang
- Department of Oral Implantology, School and Hospital of Stomatology, Kunming Medical University, Kunming, PR China; Yunnan Key Laboratory of Stomatology, Kunming, PR China.
| |
Collapse
|
2
|
Engineered Molecular Therapeutics Targeting Fibrin and the Coagulation System: a Biophysical Perspective. Biophys Rev 2022; 14:427-461. [PMID: 35399372 PMCID: PMC8984085 DOI: 10.1007/s12551-022-00950-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/25/2022] [Indexed: 02/07/2023] Open
Abstract
The coagulation cascade represents a sophisticated and highly choreographed series of molecular events taking place in the blood with important clinical implications. One key player in coagulation is fibrinogen, a highly abundant soluble blood protein that is processed by thrombin proteases at wound sites, triggering self-assembly of an insoluble protein hydrogel known as a fibrin clot. By forming the key protein component of blood clots, fibrin acts as a structural biomaterial with biophysical properties well suited to its role inhibiting fluid flow and maintaining hemostasis. Based on its clinical importance, fibrin is being investigated as a potentially valuable molecular target in the development of coagulation therapies. In this topical review, we summarize our current understanding of the coagulation cascade from a molecular, structural and biophysical perspective. We highlight single-molecule studies on proteins involved in blood coagulation and report on the current state of the art in directed evolution and molecular engineering of fibrin-targeted proteins and polymers for modulating coagulation. This biophysical overview will help acclimatize newcomers to the field and catalyze interdisciplinary work in biomolecular engineering toward the development of new therapies targeting fibrin and the coagulation system.
Collapse
|
3
|
Boss CK, Gibson DJ, Schultz G, Whitley RD, Hernandez JA, Abbott JR, Plummer CE. Therapeutic effects of equine amniotic membrane suspension on corneal re-epithelialization and haze in a modified lagomorph ex vivo wound healing model. Vet Ophthalmol 2021; 25:153-164. [PMID: 34787351 DOI: 10.1111/vop.12953] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 10/22/2021] [Accepted: 10/30/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To investigate the therapeutic effects of topical equine amniotic membrane (eAM) suspension following corneal wounding in a controlled experimental setting. PROCEDURES Equine amniotic membrane was collected, gamma irradiated, homogenized for topical suspension preparation, and cryopreserved. Corneoscleral rims harvested from fresh rabbit globes were wounded via keratectomy and were maintained in an air-liquid interface ex vivo corneal culture model. Treatment groups included topical gamma irradiated eAM suspension (n = 20) and a control group (n = 20). Re-epithelialization of the wound was assessed with daily photographic evaluation of area of fluorescein uptake (mm2 ). Corneal wound haze after a 21-day period was assessed by photographic analysis of haze area (mm2 ) and pixel intensity (0-255). Histologic processing of corneal tissue was performed, and protein identification of eAM suspension using Liquid chromatography-mass spectrometry (LC-MS). RESULTS The average day of complete corneal re-epithelialization in controls (5.5 ± 1.1) and topically treated (5.5 ± 0.6) corneas, and rates of reduction in area of fluorescein uptake over time did not significantly differ (p = .44). The corneal wound haze was significantly reduced in mean area by approximately 52% and intensity by 57% in corneas treated with topical eAM suspension (p < .05), compared to controls 21 days following wounding. Protein analysis identified numerous proteins, specifically decorin, dermatopontin, and lumican, which have previously been documented in eAM. CONCLUSIONS Area and intensity of corneal wound haze were significantly reduced in corneas treated with gamma irradiated eAM suspension, which may be due to previously identified therapeutic proteins which promote corneal clarity.
Collapse
Affiliation(s)
- Christine K Boss
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Daniel J Gibson
- College of Nursing, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Gregory Schultz
- Department of Obstetrics and Gynecology, College of Medicine, University of Florida, Gainesville, Florida, USA
| | - R David Whitley
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Jorge A Hernandez
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | | | - Caryn E Plummer
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA.,Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| |
Collapse
|
4
|
A unique group of scabies mite pseudoproteases promotes cutaneous blood coagulation and delays plasmin-induced fibrinolysis. PLoS Negl Trop Dis 2021; 15:e0008997. [PMID: 33406071 PMCID: PMC7815109 DOI: 10.1371/journal.pntd.0008997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 01/19/2021] [Accepted: 11/13/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Scabies, a highly contagious skin disease affecting more than 200 million people worldwide at any time, is caused by the parasitic mite Sarcoptes scabiei. In the absence of molecular markers, diagnosis requires experience making surveillance and control challenging. Superficial microthrombi in the absence of vasculitis in scabies-affected skin are a recognised, yet unexplained histopathological differential of scabies infection. This study demonstrates that a family of Scabies Mite Inactivated Cysteine Protease Paralogues (SMIPP-Cs) excreted by the mites plays a role in formation of scabies-induced superficial microthrombi. METHODOLOGY/PRINCIPAL FINDINGS A series of in vitro and ex vivo experiments involving two representative recombinant SMIPP-Cs was carried out. In the presence of SMIPP-Cs, the thrombin clotting time (TCT), fibrin formation and plasmin induced fibrinolysis were monitored in vitro. The ultrastructure of the SMIPP-C-modulated fibrin was analysed by Scanning Electron Microscopy (SEM). Immuno-histological analyses were performed ex vivo, to localise the SMIPP-C proteins within scabies infected skin biopsies. SMIPP-Cs displayed pro-coagulant properties. They bound calcium ions, reduced the thrombin clotting time, enhanced the fibrin formation rate and delayed plasmin-induced fibrinolysis. The SMIPP-Cs associated with fibrin clots during fibrinogen polymerisation and did not bind to preformed fibrin. Scanning electron microscopy revealed that the fibrin clots formed in the presence of SMIPP-Cs were aberrant and denser than normal fibrin clots. SMIPP-Cs were detected in microthrombi which are commonly seen in scabietic skin. CONCLUSIONS/SIGNIFICANCE The SMIPP-Cs are the first scabies mite proteins found in sub-epidermal skin layers and their pro-coagulant properties promote superficial microthrombi formation in scabetic skin. Further research is needed to evaluate their potential as diagnostic or therapeutic target.
Collapse
|
5
|
Kramer AC, Blake AL, Taisto ME, Lehrke MJ, Webber BR, Lund TC. Dermatopontin in Bone Marrow Extracellular Matrix Regulates Adherence but Is Dispensable for Murine Hematopoietic Cell Maintenance. Stem Cell Reports 2017; 9:770-778. [PMID: 28844660 PMCID: PMC5599243 DOI: 10.1016/j.stemcr.2017.07.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 07/25/2017] [Accepted: 07/26/2017] [Indexed: 01/03/2023] Open
Abstract
The hematopoietic marrow microenvironment is composed of multiple cell types embedded in an extracellular matrix (ECM). We have explored marrow ECM using mass spectrometry and found dermatopontin (DPT), a small non-collagenous ECM protein, to be present. We found that DPT cooperates with other ECM proteins to promote hematopoietic cell adherence in vitro on plastic as well as OP9 stromal cells. We generated constitutional DPT−/− mice that were viable and had no peripheral lympho-hematopoietic abnormalities. The composition of the marrow of wild-type and DPT−/− mice was equivalent in terms of cellularity, CFU-C, LSK (Lineage−, SCA-1+, KIT+), and LSK-SLAM (LSK, CD48−, CD150+) frequencies. These data suggest that DPT fosters adherence but is not required for steady-state hematopoiesis in vivo. There are likely overlapping cellular adhesion mechanisms that can compensate to maintain the hematopoietic niche in the absence of DPT. Murine marrow can be decellularized to reveal the ECM Dermatopontin is a component of the marrow ECM DPT can promote HSPC adherence in vitro DPT is dispensable for native hematopoiesis
Collapse
Affiliation(s)
- Ashley C Kramer
- Department of Pediatrics, Blood and Marrow Transplant Program, University of Minnesota Medical School, MMC 366, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - Amanda L Blake
- Department of Pediatrics, Blood and Marrow Transplant Program, University of Minnesota Medical School, MMC 366, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - Mandy E Taisto
- Department of Pediatrics, Blood and Marrow Transplant Program, University of Minnesota Medical School, MMC 366, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - Michael J Lehrke
- Department of Pediatrics, Blood and Marrow Transplant Program, University of Minnesota Medical School, MMC 366, 420 Delaware Street SE, Minneapolis, MN 55455, USA
| | - Beau R Webber
- Department of Pediatrics, Blood and Marrow Transplant Program, University of Minnesota Medical School, MMC 366, 420 Delaware Street SE, Minneapolis, MN 55455, USA; B-MoGen Biotechnologies, Inc., 614 McKinley Place NE, Minneapolis, MN 55413, USA
| | - Troy C Lund
- Department of Pediatrics, Blood and Marrow Transplant Program, University of Minnesota Medical School, MMC 366, 420 Delaware Street SE, Minneapolis, MN 55455, USA.
| |
Collapse
|
6
|
Lefebvre P, Lalloyer F, Baugé E, Pawlak M, Gheeraert C, Dehondt H, Vanhoutte J, Woitrain E, Hennuyer N, Mazuy C, Bobowski-Gérard M, Zummo FP, Derudas B, Driessen A, Hubens G, Vonghia L, Kwanten WJ, Michielsen P, Vanwolleghem T, Eeckhoute J, Verrijken A, Van Gaal L, Francque S, Staels B. Interspecies NASH disease activity whole-genome profiling identifies a fibrogenic role of PPARα-regulated dermatopontin. JCI Insight 2017; 2:92264. [PMID: 28679947 DOI: 10.1172/jci.insight.92264] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 05/19/2017] [Indexed: 12/21/2022] Open
Abstract
Nonalcoholic fatty liver disease prevalence is soaring with the obesity pandemic, but the pathogenic mechanisms leading to the progression toward active nonalcoholic steatohepatitis (NASH) and fibrosis, major causes of liver-related death, are poorly defined. To identify key components during the progression toward NASH and fibrosis, we investigated the liver transcriptome in a human cohort of NASH patients. The transition from histologically proven fatty liver to NASH and fibrosis was characterized by gene expression patterns that successively reflected altered functions in metabolism, inflammation, and epithelial-mesenchymal transition. A meta-analysis combining our and public human transcriptomic datasets with murine models of NASH and fibrosis defined a molecular signature characterizing NASH and fibrosis and evidencing abnormal inflammation and extracellular matrix (ECM) homeostasis. Dermatopontin expression was found increased in fibrosis, and reversal of fibrosis after gastric bypass correlated with decreased dermatopontin expression. Functional studies in mice identified an active role for dermatopontin in collagen deposition and fibrosis. PPARα activation lowered dermatopontin expression through a transrepressive mechanism affecting the Klf6/TGFβ1 pathway. Liver fibrotic histological damages are thus characterized by the deregulated expression of a restricted set of inflammation- and ECM-related genes. Among them, dermatopontin may be a valuable target to reverse the hepatic fibrotic process.
Collapse
Affiliation(s)
- Philippe Lefebvre
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Fanny Lalloyer
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Eric Baugé
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Michal Pawlak
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Céline Gheeraert
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Hélène Dehondt
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Jonathan Vanhoutte
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Eloise Woitrain
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Nathalie Hennuyer
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Claire Mazuy
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Marie Bobowski-Gérard
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Francesco Paolo Zummo
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Bruno Derudas
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | | | | | - Luisa Vonghia
- Department of Gastroenterology and Hepatology, and.,Department of Endocrinology, Diabetology and Metabolism, University Hospital Antwerp, Edegem, Belgium
| | - Wilhelmus J Kwanten
- Department of Gastroenterology and Hepatology, and.,Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Antwerp, Belgium
| | - Peter Michielsen
- Department of Gastroenterology and Hepatology, and.,Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Antwerp, Belgium
| | - Thomas Vanwolleghem
- Department of Gastroenterology and Hepatology, and.,Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Antwerp, Belgium
| | - Jérôme Eeckhoute
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - An Verrijken
- Department of Endocrinology, Diabetology and Metabolism, University Hospital Antwerp, Edegem, Belgium.,Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Antwerp, Belgium
| | - Luc Van Gaal
- Department of Endocrinology, Diabetology and Metabolism, University Hospital Antwerp, Edegem, Belgium.,Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Antwerp, Belgium
| | - Sven Francque
- Department of Gastroenterology and Hepatology, and.,Laboratory of Experimental Medicine and Pediatrics, University of Antwerp, Antwerp, Belgium
| | - Bart Staels
- University Lille, Inserm, CHU-Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| |
Collapse
|
7
|
Krishnaswamy VR, Balaguru UM, Chatterjee S, Korrapati PS. Dermatopontin augments angiogenesis and modulates the expression of transforming growth factor beta 1 and integrin alpha 3 beta 1 in endothelial cells. Eur J Cell Biol 2017; 96:266-275. [DOI: 10.1016/j.ejcb.2017.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 02/28/2017] [Accepted: 02/28/2017] [Indexed: 02/01/2023] Open
|
8
|
Liang X, Ma L, Long X, Wang X. LncRNA expression profiles and validation in keloid and normal skin tissue. Int J Oncol 2015; 47:1829-38. [PMID: 26397149 DOI: 10.3892/ijo.2015.3177] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 09/04/2015] [Indexed: 11/06/2022] Open
Abstract
Keloid is a type of pathological skin scar. Pathogenesis of keloid is complex and is not fully understood. lncRNA can regulate gene expression on different levels. It also participates in cell cycle regulation and cell proliferation. The present study investigated the potential biological function of lncRNA in keloid. We identified differential expression of lncRNAs and mRNAs between 3 pairs of keloid and normal skin tissue by microarray. Differentially expressed lncRNAs were validated by quantitative reverse transcriptase-PCR (qRT-PCR). Gene ontology (GO) and pathway analysis presented the characteristics of associated protein-coding genes. Additionally, a co-expression network of lncRNA and mRNA was constructed to find potential underlying regulation targets. There were 1,731 lncRNAs constantly upregulated and 782 downregulated, 1,079 mRNAs upregulated and 3,282 downregulated in keloid respectively (fold change ≥ 2.0, p<0.05). We chose, respectively, 3 upregulated and 1 downregulated lncRNA for qRT-PCR and results were consistent with microarray. Moreover, 11 pathways were related with upregulated transcripts and 44 with downregulated in keloid. The co-expression network revealed that one lncRNA was connected with numerous mRNAs, and vice versa. Furthermore, bioinformation analysis suggested that lncRNA CACNA1G-AS1 may be crucial to keloid formation. In conclusion, groups of lncRNAs were aberrantly expressed in keloid compared with normal skin tissue, which indicated that differentially expressed lncRNAs may play a key role in keloid formation. The present study provides new insights into keloid pathology and potential targets for treatment of keloid.
Collapse
Affiliation(s)
- Xuebing Liang
- Division of Plastic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R. China
| | - Lin Ma
- Division of Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R. China
| | - Xiao Long
- Division of Plastic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R. China
| | - Xiaojun Wang
- Division of Plastic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R. China
| |
Collapse
|
9
|
Kato A, Okamoto O, Wu W, Matsuo N, Kumai J, Yamada Y, Katagiri F, Nomizu M, Fujiwara S. Identification of fibronectin binding sites in dermatopontin and their biological function. J Dermatol Sci 2014; 76:51-9. [DOI: 10.1016/j.jdermsci.2014.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Revised: 06/23/2014] [Accepted: 07/07/2014] [Indexed: 11/27/2022]
|
10
|
Expression and integrity of dermatopontin in chronic cutaneous wounds: a crucial factor in impaired wound healing. Cell Tissue Res 2014; 358:833-41. [PMID: 25260909 DOI: 10.1007/s00441-014-2000-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 08/28/2014] [Indexed: 10/24/2022]
Abstract
Chronic cutaneous wound (CCW) is a major health care burden wherein the healing process is slow or rather static resulting in anatomical and functional restriction of the damaged tissue. Dysregulated expression and degradation of matrix proteins, growth factors and cytokines contribute to the disrupted and uncoordinated healing process of CCW. Therefore, therapeutic approaches for effective management of CCW should be focused towards identifying and manipulating the molecular defects, such as reduced bioavailability of the pro-healing molecules and elevated activity of proteases. This study essentially deals with assessing the expression and integrity of an extracellular matrix protein, Dermatopontin (DPT), in CCW using real-time quantitative reverse transcriptase PCR and immunological techniques. The results indicate that, despite DPT's high mRNA expression, the protein levels are markedly reduced in both CCW tissue and its exudate. To elucidate the cause for this contradiction in mRNA and protein levels, the stability of DPT is analyzed in the presence of wound exudates and various proteases that are naturally elevated in CCW. DPT was observed to be degraded at higher rates when incubated with certain recombinant proteases or chronic wound exudate. In conclusion, the susceptibility of DPT protein to specific proteases present at high levels in the wound milieu resulted in the degradation of DPT, thus leading to impaired healing response in CCW.
Collapse
|
11
|
Wu W, Okamoto O, Kato A, Matsuo N, Kumai J, Nomizu M, Fujiwara S. Functional peptide of dermatopontin produces fibrinogen fibrils and modifies its biological activity. J Dermatol Sci 2014; 76:34-43. [PMID: 25082449 DOI: 10.1016/j.jdermsci.2014.07.002] [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: 03/07/2014] [Revised: 06/11/2014] [Accepted: 07/03/2014] [Indexed: 11/15/2022]
Abstract
BACKGROUND Dermatopontin (DP), a small extracellular matrix protein, interacts with both fibrinogen and fibrin. DP accelerates fibrin fibril formation and enhances cell adhesion to fibrin fibrils but DP does not influence fibrinogen fibril formation. We have previously demonstrated that DP-4 (PHGQVVVAVRS) is a functional dermatopontin peptide (Wu et al., 2014). OBJECTIVE Identification of biological functions of DP-4. METHODS Protein-protein interactions were examined by solid-phase assay. The kinetics of fibrinogen/fibrin polymer formation was monitored by turbidity change, SDS-PAGE, and electron microscopy. A cell adhesion assay was performed using human umbilical vein endothelial cells. RESULTS Although DP promoted fibrin formation, the DP-4 peptide promoted fibrinogen polymerization but did not apparently affect fibrin formation. The polymerized fibrinogen formed straight solid fibrils comparable to the normally formed fibrin fibrils. A minimum functional sequence of the DP-4 peptide was determined to be VVVAVRS. An αC domain in fibrinogen was involved in the fibril formation. Fibrinogen fibrils made by DP-4 enhanced endothelial cell adhesion and spreading in a dose-dependent manner. This cell adhesion was inhibited by heparin and by anti-αvβ3 and β1 integrin antibodies. CONCLUSION DP-4 did not reproduce the full functional biological activities of DP with fibrin but DP-4 did promote fibrinogen fibril formation. The fibrinogen fibrils produced by DP-4 are useful as a novel synthetic biomaterial for therapeutic applications.
Collapse
Affiliation(s)
- Weimin Wu
- Department of Plastic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan
| | - Osamu Okamoto
- Department of Dermatology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan.
| | - Aiko Kato
- Department of Plastic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan
| | - Noritaka Matsuo
- Department of Biochemistry, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan
| | - Jun Kumai
- Laboratory of Clinical Biochemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Motoyoshi Nomizu
- Laboratory of Clinical Biochemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Sakuhei Fujiwara
- Department of Dermatology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan
| |
Collapse
|