1
|
Gregory CA, Ma J, Lomeli S. The coordinated activities of collagen VI and XII in maintenance of tissue structure, function and repair: evidence for a physical interaction. Front Mol Biosci 2024; 11:1376091. [PMID: 38606288 PMCID: PMC11007232 DOI: 10.3389/fmolb.2024.1376091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/14/2024] [Indexed: 04/13/2024] Open
Abstract
Collagen VI and collagen XII are structurally complex collagens of the extracellular matrix (ECM). Like all collagens, type VI and XII both possess triple-helical components that facilitate participation in the ECM network, but collagen VI and XII are distinct from the more abundant fibrillar collagens in that they also possess arrays of structurally globular modules with the capacity to propagate signaling to attached cells. Cell attachment to collagen VI and XII is known to regulate protective, proliferative or developmental processes through a variety of mechanisms, but a growing body of genetic and biochemical evidence suggests that at least some of these phenomena may be potentiated through mechanisms that require coordinated interaction between the two collagens. For example, genetic studies in humans have identified forms of myopathic Ehlers-Danlos syndrome with overlapping phenotypes that result from mutations in either collagen VI or XII, and biochemical and cell-based studies have identified accessory molecules that could form bridging interactions between the two collagens. However, the demonstration of a direct or ternary structural interaction between collagen VI or XII has not yet been reported. This Hypothesis and Theory review article examines the evidence that supports the existence of a functional complex between type VI and XII collagen in the ECM and discusses potential biological implications.
Collapse
Affiliation(s)
- Carl A. Gregory
- Department of Medical Physiology, Texas A&M School of Medicine, Bryan, TX, United States
| | | | | |
Collapse
|
2
|
Ishibashi K, Ikegami K, Shimbo T, Sasaki E, Kitayama T, Nakamura Y, Tsushima T, Ishibashi Y, Tamai K. Single-cell transcriptome analysis reveals cellular heterogeneity in mouse intra- and extra articular ligaments. Commun Biol 2022; 5:1233. [PMID: 36371589 PMCID: PMC9653455 DOI: 10.1038/s42003-022-04196-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 10/31/2022] [Indexed: 11/13/2022] Open
Abstract
Ligaments are collagenous connective tissues that connect bones. Injury of knee ligaments, namely anterior cruciate ligament (ACL) and medial collateral ligament (MCL), is common in athletes. Both ligaments have important functions, but distinct regeneration capacities. The capacity for recovery after injury also diminishes with age. However, cellular heterogeneity in the ligaments remains unclear. Here, we profiled the transcriptional signatures of ACL and MCL cells in mice using single-cell RNA sequencing. These ligaments comprise three fibroblast types expressing Col22a1, Col12a1, or Col14a1, but have distinct localizations in the tissue. We found substantial heterogeneity in Col12a1- and Col14a1-positive cells between ACL and MCL. Gene Ontology analysis revealed that angiogenesis- and collagen regulation-related genes were specifically enriched in MCL cells. Furthermore, we identified age-related changes in cell composition and gene expression in the ligaments. This study delineates cellular heterogeneity in ligaments, serving as a foundation for identifying potential therapeutic targets for ligament injuries. Cell heterogeneity in the mouse anterior cruciate ligament (ACL) and medial collateral ligament (MCL) is demonstrated using single-cell analysis with three types of fibroblasts identified, expressing Col14a1, Col12a1, or Col22a1.
Collapse
|
3
|
Herrera JA, Dingle L, Montero MA, Venkateswaran RV, Blaikley JF, Lawless C, Schwartz MA. The UIP/IPF fibroblastic focus is a collagen biosynthesis factory embedded in a distinct extracellular matrix. JCI Insight 2022; 7:e156115. [PMID: 35852874 PMCID: PMC9462507 DOI: 10.1172/jci.insight.156115] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 07/07/2022] [Indexed: 11/17/2022] Open
Abstract
Usual interstitial pneumonia (UIP) is a histological pattern characteristic of idiopathic pulmonary fibrosis (IPF). The UIP pattern is patchy with histologically normal lung adjacent to dense fibrotic tissue. At this interface, fibroblastic foci (FF) are present and are sites where myofibroblasts and extracellular matrix (ECM) accumulate. Utilizing laser capture microdissection-coupled mass spectrometry, we interrogated the FF, adjacent mature scar, and adjacent alveoli in 6 fibrotic (UIP/IPF) specimens plus 6 nonfibrotic alveolar specimens as controls. The data were subjected to qualitative and quantitative analysis and histologically validated. We found that the fibrotic alveoli protein signature is defined by immune deregulation as the strongest category. The fibrotic mature scar classified as end-stage fibrosis whereas the FF contained an overabundance of a distinctive ECM compared with the nonfibrotic control. Furthermore, FF were positive for both TGFB1 and TGFB3, whereas the aberrant basaloid cell lining of FF was predominantly positive for TGFB2. In conclusion, spatial proteomics demonstrated distinct protein compositions in the histologically defined regions of UIP/IPF tissue. These data revealed that FF are the main site of collagen biosynthesis and that the adjacent alveoli are abnormal. This essential information will inform future mechanistic studies on fibrosis progression.
Collapse
Affiliation(s)
| | - Lewis Dingle
- Blond McIndoe Laboratories, University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - M. Angeles Montero
- Department of Histopathology, Manchester University National Health Service Foundation Trust, Manchester, United Kingdom
| | - Rajamiyer V. Venkateswaran
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom
- Department of Transplant, Manchester University National Health Service Foundation Trust, Manchester, United Kingdom
| | - John F. Blaikley
- Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, United Kingdom
- Department of Transplant, Manchester University National Health Service Foundation Trust, Manchester, United Kingdom
| | | | - Martin A. Schwartz
- The Wellcome Centre for Cell-Matrix Research and
- Yale Cardiovascular Research Center and
- Departments of Internal Medicine (Cardiology) and Cell Biology, Yale School of Medicine, New Haven, Connecticut, USA
- Department of Biomedical Engineering, Yale School of Engineering & Applied Science, New Haven, Connecticut, USA
| |
Collapse
|
4
|
Louit A, Beaudet MJ, Gros-Louis F, Berthod F. Tissue-engineered in vitro modeling of the impact of Schwann cells in amyotrophic lateral sclerosis. Biotechnol Bioeng 2022; 119:1938-1948. [PMID: 35289393 DOI: 10.1002/bit.28083] [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: 08/02/2021] [Revised: 12/14/2021] [Accepted: 03/07/2022] [Indexed: 11/06/2022]
Abstract
Amyotrophic Lateral Sclerosis (ALS) is a devastating neurodegenerative disease affecting upper and lower motor neurons (MN). To investigate whether Schwann cells could be involved in the disease pathogenesis, we developed a tissue-engineered 3D in vitro model that combined MNs cocultured with astrocytes and microglia seeded on top of a collagen sponge populated with epineurium fibroblasts to enable 3D axonal migration. C2C12 myoblasts were seeded underneath the sponge in presence or absence of Schwann cells. To reproduce an ALS cellular microenvironment, MNs, astrocytes and microglia were extracted from SOD1G93A mice recapitulating many aspects of the human disease. This 3D ALS in vitro model was compared with a 3D control made of cells isolated from SOD1WT mice. We showed that normal Schwann cells strongly enhanced MN axonal migration in the 3D control model but had no effect in the ALS model. However, ALS-derived Schwann cells isolated from SOD1G93A mice failed to significantly improve axonal migration in both models. These results suggest that a cell therapy using healthy Schwann cells may not be effective in promoting axonal regeneration in ALS. In addition, this 3D ALS model could be used to study the impact of other cell types on ALS by various combinations of normal and diseased cells. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Aurélie Louit
- LOEX, Centre de recherche du CHU de Québec-Université Laval
| | | | - François Gros-Louis
- LOEX, Centre de recherche du CHU de Québec-Université Laval.,Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada
| | - François Berthod
- LOEX, Centre de recherche du CHU de Québec-Université Laval.,Department of Surgery, Faculty of Medicine, Université Laval, Quebec City, Quebec, Canada
| |
Collapse
|
5
|
Barnum CE, Shetye SS, Fazelinia H, Garcia BA, Fang S, Alzamora M, Li H, Brown LM, Tang C, Myers K, Wapner R, Soslowsky LJ, Vink JY. The Non-pregnant and Pregnant Human Cervix: a Systematic Proteomic Analysis. Reprod Sci 2022; 29:1542-1559. [PMID: 35266109 DOI: 10.1007/s43032-022-00892-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 02/13/2022] [Indexed: 10/18/2022]
Abstract
Appropriate timing of cervical remodeling (CR) is key to normal term parturition. To date, mechanisms behind normal and abnormal (premature or delayed) CR remain unclear. Recent studies show regional differences exist in human cervical tissue structure. While the entire cervix contains extracellular matrix (ECM), the internal os is highly cellular containing 50-60% cervical smooth muscle (CSM). The external os contains 10-20% CSM. Previously, we reported ECM rigidity and different ECM proteins influence CSM cell function, highlighting the importance of understanding not only how cervical cells orchestrate cervical ECM remodeling in pregnancy, but also how changes in specific ECM proteins can influence resident cellular function. To understand this dynamic process, we utilized a systematic proteomic approach to understand which soluble ECM and cellular proteins exist in the different regions of the human cervix and how the proteomic profiles change from the non-pregnant (NP) to the pregnant (PG) state. We found the human cervix proteome contains at least 4548 proteins and establish the types and relative abundance of cellular and soluble matrisome proteins found in the NP and PG human cervix. Further, we report the relative abundance of proteins involved with elastic fiber formation and ECM organization/degradation were significantly increased while proteins involved in RNA polymerase I/promoter opening, DNA methylation, senescence, immune system, and compliment activation were decreased in the PG compared to NP cervix. These findings establish an initial platform from which we can further comprehend how changes in the human cervix proteome results in normal and abnormal CR.
Collapse
Affiliation(s)
- Carrie E Barnum
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Snehal S Shetye
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Hossein Fazelinia
- Department of Biomedical and Health Informatics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Benjamin A Garcia
- Epigenetics Program, Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Shuyang Fang
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Maria Alzamora
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, NY, USA
| | - Hongyu Li
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, NY, USA
| | - Lewis M Brown
- Quantitative Proteomics and Metabolomics Center, Department of Biological Sciences, Columbia University, New York, NY, USA
| | - Chuanning Tang
- Quantitative Proteomics and Metabolomics Center, Department of Biological Sciences, Columbia University, New York, NY, USA
| | - Kristin Myers
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Ronald Wapner
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, NY, USA
| | - Louis J Soslowsky
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Joy Y Vink
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, NY, USA. .,Preterm Birth Prevention Center, Columbia University Irving Medical Center, New York, NY, USA.
| |
Collapse
|
6
|
Shibuya Y, Hokugo A, Okawa H, Kondo T, Khalil D, Wang L, Roca Y, Clements A, Sasaki H, Berry E, Nishimura I, Jarrahy R. Therapeutic downregulation of neuronal PAS domain 2 ( Npas2) promotes surgical skin wound healing. eLife 2022; 11:e71074. [PMID: 35040776 PMCID: PMC8789286 DOI: 10.7554/elife.71074] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 01/14/2022] [Indexed: 11/13/2022] Open
Abstract
Attempts to minimize scarring remain among the most difficult challenges facing surgeons, despite the use of optimal wound closure techniques. Previously, we reported improved healing of dermal excisional wounds in circadian clock neuronal PAS domain 2 (Npas2)-null mice. In this study, we performed high-throughput drug screening to identify a compound that downregulates Npas2 activity. The hit compound (Dwn1) suppressed circadian Npas2 expression, increased murine dermal fibroblast cell migration, and decreased collagen synthesis in vitro. Based on the in vitro results, Dwn1 was topically applied to iatrogenic full-thickness dorsal cutaneous wounds in a murine model. The Dwn1-treated dermal wounds healed faster with favorable mechanical strength and developed less granulation tissue than the controls. The expression of type I collagen, Tgfβ1, and α-smooth muscle actin was significantly decreased in Dwn1-treated wounds, suggesting that hypertrophic scarring and myofibroblast differentiation are attenuated by Dwn1 treatment. NPAS2 may represent an important target for therapeutic approaches to optimal surgical wound management.
Collapse
Affiliation(s)
- Yoichiro Shibuya
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
- Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of TsukubaTsukubaJapan
| | - Akishige Hokugo
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
| | - Hiroko Okawa
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of DentistryMiyagiJapan
| | - Takeru Kondo
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of DentistryMiyagiJapan
| | - Daniel Khalil
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Lixin Wang
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Yvonne Roca
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Adam Clements
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Hodaka Sasaki
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
| | - Ella Berry
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Ichiro Nishimura
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
| | - Reza Jarrahy
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| |
Collapse
|
7
|
Pach E, Kümper M, Fromme JE, Zamek J, Metzen F, Koch M, Mauch C, Zigrino P. Extracellular Matrix Remodeling by Fibroblast-MMP14 Regulates Melanoma Growth. Int J Mol Sci 2021; 22:12276. [PMID: 34830157 PMCID: PMC8625044 DOI: 10.3390/ijms222212276] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/04/2021] [Accepted: 11/11/2021] [Indexed: 12/20/2022] Open
Abstract
Maintaining a balanced state in remodeling the extracellular matrix is crucial for tissue homeostasis, and this process is altered during skin cancer progression. In melanoma, several proteolytic enzymes are expressed in a time and compartmentalized manner to support tumor progression by generating a permissive environment. One of these proteases is the matrix metalloproteinase 14 (MMP14). We could previously show that deletion of MMP14 in dermal fibroblasts results in the generation of a fibrotic-like skin in which melanoma growth is impaired. That was primarily due to collagen I accumulation due to lack of the collagenolytic activity of MMP14. However, as well as collagen I processing, MMP14 can also process several extracellular matrices. We investigated extracellular matrix alterations occurring in the MMP14-deleted fibroblasts that can contribute to the modulation of melanoma growth. The matrix deposited by cultured MMP14-deleted fibroblast displayed an antiproliferative and anti-migratory effect on melanoma cells in vitro. Analysis of the secreted and deposited-decellularized fibroblast's matrix identified a few altered proteins, among which the most significantly changed was collagen XIV. This collagen was increased because of post-translational events, while de novo synthesis was unchanged. Collagen XIV as a substrate was not pro-proliferative, pro-migratory, or adhesive, suggesting a negative regulatory role on melanoma cells. Consistent with that, increasing collagen XIV concentration in wild-type fibroblast-matrix led to reduced melanoma proliferation, migration, and adhesion. In support of its anti-tumor activity, enhanced accumulation of collagen XIV was detected in peritumoral areas of melanoma grown in mice with the fibroblast's deletion of MMP14. In advanced human melanoma samples, we detected reduced expression of collagen XIV compared to benign nevi, which showed a robust expression of this molecule around melanocytic nests. This study shows that loss of fibroblast-MMP14 affects melanoma growth through altering the peritumoral extracellular matrix (ECM) composition, with collagen XIV being a modulator of melanoma progression and a new proteolytic substrate to MMP14.
Collapse
Affiliation(s)
- Elke Pach
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (E.P.); (M.K.); (J.E.F.); (J.Z.); (C.M.)
| | - Maike Kümper
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (E.P.); (M.K.); (J.E.F.); (J.Z.); (C.M.)
| | - Julia E. Fromme
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (E.P.); (M.K.); (J.E.F.); (J.Z.); (C.M.)
- Mildred Scheel School of Oncology Aachen Bonn Cologne Düsseldorf (MSSO ABCD), 50937 Cologne, Germany
| | - Jan Zamek
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (E.P.); (M.K.); (J.E.F.); (J.Z.); (C.M.)
| | - Fabian Metzen
- Faculty of Medicine and University Hospital, Institute for Dental Research and Oral Musculoskeletal Biology and Center for Biochemistry, University of Cologne, 50937 Cologne, Germany; (F.M.); (M.K.)
| | - Manuel Koch
- Faculty of Medicine and University Hospital, Institute for Dental Research and Oral Musculoskeletal Biology and Center for Biochemistry, University of Cologne, 50937 Cologne, Germany; (F.M.); (M.K.)
| | - Cornelia Mauch
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (E.P.); (M.K.); (J.E.F.); (J.Z.); (C.M.)
| | - Paola Zigrino
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (E.P.); (M.K.); (J.E.F.); (J.Z.); (C.M.)
| |
Collapse
|
8
|
Xu Q, Torres JE, Hakim M, Babiak PM, Pal P, Battistoni CM, Nguyen M, Panitch A, Solorio L, Liu JC. Collagen- and hyaluronic acid-based hydrogels and their biomedical applications. MATERIALS SCIENCE & ENGINEERING. R, REPORTS : A REVIEW JOURNAL 2021; 146:100641. [PMID: 34483486 PMCID: PMC8409465 DOI: 10.1016/j.mser.2021.100641] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Hydrogels have been widely investigated in biomedical fields due to their similar physical and biochemical properties to the extracellular matrix (ECM). Collagen and hyaluronic acid (HA) are the main components of the ECM in many tissues. As a result, hydrogels prepared from collagen and HA hold inherent advantages in mimicking the structure and function of the native ECM. Numerous studies have focused on the development of collagen and HA hydrogels and their biomedical applications. In this extensive review, we provide a summary and analysis of the sources, features, and modifications of collagen and HA. Specifically, we highlight the fabrication, properties, and potential biomedical applications as well as promising commercialization of hydrogels based on these two natural polymers.
Collapse
Affiliation(s)
- Qinghua Xu
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jessica E. Torres
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Mazin Hakim
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Paulina M Babiak
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Pallabi Pal
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Carly M Battistoni
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Michael Nguyen
- Department of Biomedical Engineering, University of California Davis, Davis, California 95616, United States
| | - Alyssa Panitch
- Department of Biomedical Engineering, University of California Davis, Davis, California 95616, United States
| | - Luis Solorio
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Julie C. Liu
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| |
Collapse
|
9
|
Sun M, Zafrullah N, Adams S, Devaux F, Avila MY, Ziebarth N, Margo CE, Koch M, Espana EM. Collagen XIV Is an Intrinsic Regulator of Corneal Stromal Structure and Function. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:2184-2194. [PMID: 34560063 DOI: 10.1016/j.ajpath.2021.08.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/04/2021] [Accepted: 08/16/2021] [Indexed: 12/01/2022]
Abstract
Collagen XIV is poorly characterized in the body, and the current knowledge of its function in the cornea is limited. The aim of the current study was to elucidate the role(s) of collagen XIV in regulating corneal stromal structure and function. Analysis of collagen XIV expression, temporal and spatial, was performed at different postnatal days (Ps) in wild-type C57BL/6 mouse corneal stromas and after injury. Conventional collagen XIV null mice were used to inquire the roles that collagen XIV plays in fibrillogenesis, fibril packing, and tissue mechanics. Fibril assembly and packing as well as stromal organization were evaluated using transmission electron microscopy and second harmonic generation microscopy. Atomic force microscopy was used to assess stromal stiffness. Col14a1 mRNA expression was present at P4 to P10 and decreased at P30. No immunoreactivity was noted at P150. Abnormal collagen fibril assembly with a shift toward larger-diameter fibrils and increased interfibrillar spacing in the absence of collagen XIV was found. Second harmonic generation microscopy showed impaired fibrillogenesis in the collagen XIV null stroma. Mechanical testing suggested that collagen XIV confers stiffness to stromal tissue. Expression of collagen XIV is up-regulated following injury. This study indicates that collagen XIV plays a regulatory role in corneal development and in the function of the adult cornea. The expression of collagen XIV is recapitulated during wound healing.
Collapse
Affiliation(s)
- Mei Sun
- Cornea and External Disease, Department of Ophthalmology, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | - Nabeel Zafrullah
- Cornea and External Disease, Department of Ophthalmology, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | - Sheila Adams
- Cornea and External Disease, Department of Ophthalmology, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | - Floriane Devaux
- Biomedical Atomic Force Microscopy Laboratory, Department of Biomedical Engineering, College of Engineering, University of Miami, Miami, Florida
| | - Marcel Y Avila
- Department of Ophthalmology, Universidad Nacional de Colombia, Bogota, Colombia
| | - Noel Ziebarth
- Biomedical Atomic Force Microscopy Laboratory, Department of Biomedical Engineering, College of Engineering, University of Miami, Miami, Florida; Department of Physiology and Biophysics, Miller School of Medicine, University of Miami, Miami, Florida
| | - Curtis E Margo
- Cornea and External Disease, Department of Ophthalmology, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | - Manuel Koch
- Institute for Dental Research and Oral Musculoskeletal Biology, Center for Biochemistry, University of Cologne, Cologne, Germany
| | - Edgar M Espana
- Cornea and External Disease, Department of Ophthalmology, University of South Florida, Morsani College of Medicine, Tampa, Florida; Department of Molecular Pharmacology and Physiology, University of South Florida, Morsani College of Medicine, Tampa, Florida.
| |
Collapse
|
10
|
Calò CM, Onali F, Robledo R, Flore L, Massidda M, Francalacci P. Worldwide variation of the COL14A1 gene is shaped by genetic drift rather than selective pressure. Mol Genet Genomic Med 2021; 9:e1629. [PMID: 33650783 PMCID: PMC8123734 DOI: 10.1002/mgg3.1629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/30/2020] [Accepted: 02/10/2021] [Indexed: 11/17/2022] Open
Abstract
Background The aim of this study is to analyze the worldwide distribution of SNP rs4870723 in COL14A1 gene to check if there are significant genetic differences among different populations and to test if the gene is a trait under selection. Methods Genomic DNA was extracted from 69 unrelated individuals from Sardinia and genotyped for SNP rs4870723. Data were compared with 26 different populations, clustered in 5 super‐populations, from the public 1000 genomes database. Allele frequency and heterozygosity were calculated with Genepop. The Hardy–Weinberg equilibrium and pairwise population differentiation through analysis of molecular variance (AMOVA FST) were determined with Arlequin. Results Allele frequencies of COL14A1 rs4870723 were compared in 27 populations clustered in 5 super‐populations. All populations were in the Hardy–Weinberg equilibrium. In almost all populations, allele C was the most frequent allele, reaching the highest values in East Asia. The 27 populations showed an appreciable structure, with significant differences observed between European, African, and Asian populations. Conclusion Significant differences were observed in the rs4870723 SNP distribution among the populations studied. However, we found no evidence for a selective pressure. Rather, the differentiation among the populations is likely the result of founder effect, genetic drift, and cultural factors, all events known to establish and maintain genetic diversity between populations.
Collapse
Affiliation(s)
- Carla M Calò
- Department of Life and Environment Sciences, University of Cagliari, Cagliari, Italy
| | - Federico Onali
- Department of Life and Environment Sciences, University of Cagliari, Cagliari, Italy
| | - Renato Robledo
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Laura Flore
- Department of Life and Environment Sciences, University of Cagliari, Cagliari, Italy
| | - Myosotis Massidda
- Department of Life and Environment Sciences, University of Cagliari, Cagliari, Italy
| | - Paolo Francalacci
- Department of Life and Environment Sciences, University of Cagliari, Cagliari, Italy
| |
Collapse
|
11
|
Schönborn K, Willenborg S, Schulz JN, Imhof T, Eming SA, Quondamatteo F, Brinckmann J, Niehoff A, Paulsson M, Koch M, Eckes B, Krieg T. Role of collagen XII in skin homeostasis and repair. Matrix Biol 2020; 94:57-76. [DOI: 10.1016/j.matbio.2020.08.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 01/20/2023]
|
12
|
|
13
|
Heraud S, Delalleau A, Houcine A, Guiraud B, Bacqueville D, Payre B, Delisle MB, Bessou-Touya S, Damour O. Structural and Biomechanical Characterization of a Scaffold-Free Skin Equivalent Model via Biophysical Methods. Skin Pharmacol Physiol 2019; 33:17-29. [PMID: 31852002 DOI: 10.1159/000503154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 09/02/2019] [Indexed: 11/19/2022]
Abstract
AIMS Among in vitro skin models, the scaffold-free skin equivalent (SFSE), without exogenous material, is interesting for pharmacotoxicological studies. Our aim was to adapt in vivo biophysical methods to study the structure, thickness, and extracellular matrix of our in vitro model without any chemical fixation needed as for histology. METHODS We evaluated 3 batches of SFSE and characterized them by histology, transmission electron microscopy (TEM), and immunofluorescence. In parallel, we investigated 3 biophysical methods classically used for in vivo evaluation, optical coherence tomography (OCT), and laser scanning microscopy (LSM) imaging devices as well as the cutometer suction to study the biomechanical properties. RESULTS OCT allowed the evaluation of SFSE total thickness and its different compartments. LSM has a greater resolution enabling an evaluation at the cell scale and the orientation of collagen fibers. The viscoelasticity measurement by cutometry was possible on our thin skin model and might be linked with mature collagen bundles visible in TEM and LSM and with elastic fibers seen in immunofluorescence. CONCLUSION Our data demonstrated the simplicity and sensitivity of these different in vivo biophysical devices on our thin skin model. These noninvasive tools allow to study the morphology and the biomechanics of in vitro models.
Collapse
Affiliation(s)
- Sandrine Heraud
- Banque de Tissus et Cellules, Hospices Civils de Lyon and LBTI, UMR 5305, Lyon, France, .,Pierre Fabre, R&D PFDC, Département Pharmacologie, Toulouse, France,
| | | | - Audrey Houcine
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse, France
| | - Béatrice Guiraud
- Pierre Fabre, R&D PFDC, Département Pharmacologie, Toulouse, France
| | | | - Bruno Payre
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse, France
| | - Marie-Bernadette Delisle
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse, France.,CHU Toulouse and INSERM U 1037, Toulouse, France
| | | | - Odile Damour
- Banque de Tissus et Cellules, Hospices Civils de Lyon and LBTI, UMR 5305, Lyon, France
| |
Collapse
|
14
|
Skin Protein Profile after Major Weight Loss and Its Role in Body Contouring Surgery. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2019; 7:e2339. [PMID: 31592376 PMCID: PMC6756662 DOI: 10.1097/gox.0000000000002339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 05/08/2019] [Indexed: 12/20/2022]
Abstract
Chronic inflammation during morbid obesity significantly alters cutaneous tissue. Large weight loss achieved after bariatric surgery minimizes or halts damage caused by metabolic syndrome, but further deteriorates the clinical condition of skin. Postbariatric skin flaccidity produces major difficulties to plastic surgery. In this study, we analyzed differences in protein composition of the skin between patients with morbid obesity and those after large weight loss and established correlations between differentially expressed proteins and clinical characteristics of postbariatric skin tissue, to improve body contouring surgery techniques.
Collapse
|
15
|
Sasaki H, Hokugo A, Wang L, Morinaga K, Ngo JT, Okawa H, Nishimura I. Neuronal PAS Domain 2 (Npas2)-Deficient Fibroblasts Accelerate Skin Wound Healing and Dermal Collagen Reconstruction. Anat Rec (Hoboken) 2019; 303:1630-1641. [PMID: 30851151 DOI: 10.1002/ar.24109] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 12/11/2018] [Accepted: 12/17/2018] [Indexed: 01/17/2023]
Abstract
The circadian clock, which consists of endogenous self-sustained and cell-autonomous oscillations in mammalian cells, is known to regulate a wide range of peripheral tissues. The unique upregulation of a clock gene, neuronal PAS domain protein 2 (Npas2), observed along with fibroblast aging prompted us to investigate the role of Npas2 in the homeostasis of dermal structure using in vivo and in vitro wound healing models. Time-course healing of a full-thickness skin punched wound exhibited significantly faster wound closure in Npas2-/- mice than wild-type (WT) C57Bl/6J mice. Dorsal skin fibroblasts isolated from WT, Npas2+/-, and Npas2-/- mice exhibited consistent profiles of core clock gene expression except for Npas2 and Per2. In vitro behavioral characterizations of dermal fibroblasts revealed that Npas2-/- mutation was associated with increased proliferation, migration, and cell contraction measured by floating collagen gel contraction and single-cell force contraction assays. Npas2 knockout fibroblasts carrying sustained the high expression level of type XII and XIV FAICT collagens and synthesized dermis-like thick collagen fibers in vitro. Confocal laser scanning microscopy demonstrated the reconstruction of dermis-like collagen architecture in the wound healing area of Npas2-/- mice. This study indicates that the induced Npas2 expression in fibroblasts may interfere with skin homeostasis, wound healing, and dermal tissue reconstruction, providing a basis for novel therapeutic target and strategy. Anat Rec, 2019. © 2019 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Hodaka Sasaki
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, California.,Department of Oral and Maxillofacial Implantology, Tokyo Dental College, Tokyo, Japan
| | - Akishige Hokugo
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, California.,Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Lixin Wang
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, California.,Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Kenzo Morinaga
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, California.,Department of Oral Rehabilitation, Section of Oral Implantology, Fukuoka Dental College, Fukuoka, Japan
| | - John T Ngo
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, California
| | - Hiroko Okawa
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, California.,Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Ichiro Nishimura
- Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, Los Angeles, California
| |
Collapse
|
16
|
Study of the Chronology of Expression of Ten Extracellular Matrix Molecules during the Myogenesis in Cattle to Better Understand Sensory Properties of Meat. Foods 2019; 8:foods8030097. [PMID: 30871212 PMCID: PMC6462999 DOI: 10.3390/foods8030097] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/08/2019] [Accepted: 03/08/2019] [Indexed: 01/18/2023] Open
Abstract
The sensory properties of beef are known to depend on muscle fiber and intramuscular connective tissue composition (IMCT). IMCT is composed of collagens, proteoglycans and glycoproteins. The differentiation of muscle fibers has been extensively studied but there is scarcity in the data concerning IMCT differentiation. In order to be able to control muscle differentiation to improve beef quality, it is essential to understand the ontogenesis of IMCT molecules. Therefore, in this study, we investigated the chronology of appearance of 10 IMCT molecules in bovine Semitendinosus muscle using immunohistology technique at five key stages of myogenesis. Since 60 days post-conception (dpc), the whole molecules were present, but did not have their final location. It seems that they reach it at around 210 dpc. Then, the findings emphasized that since 210 dpc, the stage at which the differentiation of muscle fibers is almost complete, the differentiation of IMCT is almost completed. These data suggested that for the best controlling of the muscular differentiation to improve beef sensory quality, it would be necessary to intervene very early (before the IMCT constituents have acquired their definitive localization and the muscle fibers have finished differentiating), i.e., at the beginning of the first third of gestation.
Collapse
|
17
|
Theocharidis G, Connelly JT. Minor collagens of the skin with not so minor functions. J Anat 2017; 235:418-429. [PMID: 31318053 DOI: 10.1111/joa.12584] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2016] [Indexed: 11/30/2022] Open
Abstract
The structure and function of the skin relies on the complex expression pattern and organisation of extracellular matrix macromolecules, of which collagens are a principal component. The fibrillar collagens, types I and III, constitute over 90% of the collagen content within the skin and are the major determinants of the strength and stiffness of the tissue. However, the minor collagens also play a crucial regulatory role in a variety of processes, including cell anchorage, matrix assembly, and growth factor signalling. In this article, we review the expression patterns, key functions and involvement in disease pathogenesis of the minor collagens found in the skin. While it is clear that the minor collagens are important mediators of normal tissue function, homeostasis and repair, further insight into the molecular level structure and activity of these proteins is required for translation into clinical therapies.
Collapse
Affiliation(s)
- Georgios Theocharidis
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - John T Connelly
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| |
Collapse
|
18
|
Erickson JR, Gearhart MD, Honson DD, Reid TA, Gardner MK, Moriarity BS, Echeverri K. A novel role for SALL4 during scar-free wound healing in axolotl. NPJ Regen Med 2016; 1. [PMID: 28955504 PMCID: PMC5612448 DOI: 10.1038/npjregenmed.2016.16] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The human response to serious cutaneous damage is limited to relatively primitive wound healing, whereby collagenous scar tissue fills the wound bed. Scars assure structural integrity at the expense of functional regeneration. In contrast, axolotls have the remarkable capacity to functionally regenerate full thickness wounds. Here, we identified a novel role for SALL4 in regulating collagen transcription after injury that is essential for perfect skin regeneration in axolotl. Furthermore, we identify miR-219 as a molecular regulator of Sall4 during wound healing. Taken together, our work highlights one molecular mechanism that allows for efficient cutaneous wound healing in the axolotl.
Collapse
Affiliation(s)
- Jami R Erickson
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minnesota, MN, USA
| | - Micah D Gearhart
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minnesota, MN, USA
| | - Drew D Honson
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minnesota, MN, USA
| | - Taylor A Reid
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minnesota, MN, USA
| | - Melissa K Gardner
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minnesota, MN, USA
| | - Branden S Moriarity
- Department of Pediatrics, University of Minnesota, Center for Genome Engineering, University of Minnesota, Masonic Cancer Center, University of Minnesota, Minnesota, MN USA
| | - Karen Echeverri
- Department of Genetics, Cell Biology and Development, University of Minnesota, Minnesota, MN, USA
| |
Collapse
|
19
|
Listrat A, Pissavy A, Micol D, Jurie C, Lethias C, Pethick D, Hocquette J. Collagens XII and XIV: Two collagen types both associated with bovine muscle and intramuscular lipid metabolism. Livest Sci 2016. [DOI: 10.1016/j.livsci.2016.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
20
|
Cadau S, Leoty-Okombi S, Pain S, Bechetoille N, André-Frei V, Berthod F. In vitro glycation of an endothelialized and innervated tissue-engineered skin to screen anti-AGE molecules. Biomaterials 2015; 51:216-225. [PMID: 25771012 DOI: 10.1016/j.biomaterials.2015.01.066] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 01/12/2015] [Accepted: 01/25/2015] [Indexed: 01/06/2023]
Abstract
Glycation is one of the major processes responsible for skin aging through induction of the detrimental formation of advanced glycation end-products (AGEs). We developed an innovative tissue-engineered skin combining both a capillary-like and a nerve networks and designed a protocol to induce continuous AGEs formation by a treatment with glyoxal. We determined the optimal concentration of glyoxal to induce AGEs formation identified by carboxymethyl-lysin expression while keeping their toxic effects low. We showed that our tissue-engineered skin cultured for 44 days and treated with 200 μm glyoxal for 31 days displayed high carboxymethyl-lysine expression, which induced a progressively increased alteration of its capillary and nerve networks between 28 and 44 days. Moreover, it produced an epidermal differentiation defect evidenced by the lack of loricrin and filaggrin expression in the epidermis. These effects were almost completely prevented by addition of aminoguanidine 1.5 mm, an anti-glycation compound, and only slightly decreased by alagebrium 500 μm, an AGE-breaker molecule. This tissue-engineered skin model is the first one to combine a capillary and nerve network and to enable a continuous glycation over a long-term culture period. It is a unique tool to investigate the effects of glycation on skin and to screen new molecules that could prevent AGEs formation.
Collapse
Affiliation(s)
- Sébastien Cadau
- Centre LOEX de l'Université Laval, Centre de recherche du CHU de Québec, 1401, 18e Rue, Québec, QC G1J 1Z4, Canada; Département de Chirurgie, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | | | - Sabine Pain
- BASF Beauty Care Solutions, 32 Rue Saint Jean de Dieu, Lyon 69007, France
| | | | - Valérie André-Frei
- BASF Beauty Care Solutions, 32 Rue Saint Jean de Dieu, Lyon 69007, France
| | - François Berthod
- Centre LOEX de l'Université Laval, Centre de recherche du CHU de Québec, 1401, 18e Rue, Québec, QC G1J 1Z4, Canada; Département de Chirurgie, Faculté de Médecine, Université Laval, Québec, QC, Canada.
| |
Collapse
|
21
|
Sánchez-Muñoz I, Granados R, Holguín Holgado P, García-Vela JA, Casares C, Casares M. The Use of Adipose Mesenchymal Stem Cells and Human Umbilical Vascular Endothelial Cells on a Fibrin Matrix for Endothelialized Skin Substitute. Tissue Eng Part A 2015; 21:214-23. [DOI: 10.1089/ten.tea.2013.0626] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
| | - Rosario Granados
- Department of Pathology, Hospital Universitario de Getafe, Madrid, Spain
| | | | | | - Celia Casares
- Tissue Bank, Hospital Universitario de Getafe, Madrid, Spain
| | - Miguel Casares
- Tissue Bank, Hospital Universitario de Getafe, Madrid, Spain
| |
Collapse
|
22
|
Godwin J, Kuraitis D, Rosenthal N. Extracellular matrix considerations for scar-free repair and regeneration: Insights from regenerative diversity among vertebrates. Int J Biochem Cell Biol 2014; 56:47-55. [DOI: 10.1016/j.biocel.2014.10.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 10/04/2014] [Accepted: 10/07/2014] [Indexed: 02/06/2023]
|
23
|
Chiquet M, Birk DE, Bönnemann CG, Koch M. Collagen XII: Protecting bone and muscle integrity by organizing collagen fibrils. Int J Biochem Cell Biol 2014; 53:51-4. [PMID: 24801612 PMCID: PMC4119597 DOI: 10.1016/j.biocel.2014.04.020] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 04/17/2014] [Accepted: 04/25/2014] [Indexed: 10/25/2022]
Abstract
Collagen XII, largest member of the fibril-associated collagens with interrupted triple helix (FACIT) family, assembles from three identical α-chains encoded by the COL12A1 gene. The molecule consists of three threadlike N-terminal noncollagenous NC3 domains, joined by disulfide bonds and a short interrupted collagen triple helix toward the C-terminus. Splice variants differ considerably in size and properties: "small" collagen XIIB (220 kDa subunit) is similar to collagen XIV, whereas collagen XIIA (350 kDa) has a much larger NC3 domain carrying glycosaminoglycan chains. Collagen XII binds to collagen I-containing fibrils via its collagenous domain, whereas its large noncollagenous arms interact with other matrix proteins such as tenascin-X. In dense connective tissues and bone, collagen XII is thought to regulate organization and mechanical properties of collagen fibril bundles. Accordingly, recent findings show that collagen XII mutations cause Ehlers-Danlos/myopathy overlap syndrome associated with skeletal abnormalities and muscle weakness in mice and humans.
Collapse
Affiliation(s)
- Matthias Chiquet
- Department of Orthodontics and Dentofacial Orthopedics, School of Dental Medicine, University of Bern, Bern, Switzerland.
| | - David E Birk
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL, USA
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA
| | - Manuel Koch
- Institute for Dental Research and Oral Musculoskeletal Biology, Center for Molecular Medicine Cologne, and Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany; Centro de Biologia Ambiental, Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
| |
Collapse
|
24
|
White JF, Werkmeister JA, Bisucci T, Darby IA, Ramshaw JAM. Temporal variation in the deposition of different types of collagen within a porous biomaterial implant. J Biomed Mater Res A 2013; 102:3550-5. [DOI: 10.1002/jbm.a.35027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 10/31/2013] [Indexed: 01/24/2023]
Affiliation(s)
- Jacinta F. White
- CSIRO Materials Science and Engineering; Bayview Avenue Clayton Victoria 3169 Australia
| | - Jerome A. Werkmeister
- CSIRO Materials Science and Engineering; Bayview Avenue Clayton Victoria 3169 Australia
| | - Teresa Bisucci
- School of Medical Sciences; RMIT University; Bundoora Victoria 3083 Australia
| | - Ian A. Darby
- School of Medical Sciences; RMIT University; Bundoora Victoria 3083 Australia
| | - John A. M. Ramshaw
- CSIRO Materials Science and Engineering; Bayview Avenue Clayton Victoria 3169 Australia
| |
Collapse
|
25
|
Systemic sclerosis with multiple nodules: characterization of the extracellular matrix. Arch Dermatol Res 2013; 305:645-52. [DOI: 10.1007/s00403-013-1383-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 06/17/2013] [Accepted: 06/20/2013] [Indexed: 01/04/2023]
|
26
|
Blais M, Parenteau-Bareil R, Cadau S, Berthod F. Concise review: tissue-engineered skin and nerve regeneration in burn treatment. Stem Cells Transl Med 2013; 2:545-51. [PMID: 23734060 DOI: 10.5966/sctm.2012-0181] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Burns not only destroy the barrier function of the skin but also alter the perceptions of pain, temperature, and touch. Different strategies have been developed over the years to cover deep and extensive burns with the ultimate goal of regenerating the barrier function of the epidermis while recovering an acceptable aesthetic aspect. However, patients often complain about a loss of skin sensation and even cutaneous chronic pain. Cutaneous nerve regeneration can occur from the nerve endings of the wound bed, but it is often compromised by scar formation or anarchic wound healing. Restoration of pain, temperature, and touch perceptions should now be a major challenge to solve in order to improve patients' quality of life. In addition, the cutaneous nerve network has been recently highlighted to play an important role in epidermal homeostasis and may be essential at least in the early phase of wound healing through the induction of neurogenic inflammation. Although the nerve regeneration process was studied largely in the context of nerve transections, very few studies have been aimed at developing strategies to improve it in the context of cutaneous wound healing. In this concise review, we provide a description of the characteristics of and current treatments for extensive burns, including tissue-engineered skin approaches to improve cutaneous nerve regeneration, and describe prospective uses for autologous skin-derived adult stem cells to enhance recovery of the skin's sense of touch.
Collapse
Affiliation(s)
- Mathieu Blais
- Centre LOEX de l'Université Laval, Centre de Recherche du CHU de Québec, and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec, Quebec, Canada
| | | | | | | |
Collapse
|
27
|
Tao G, Levay AK, Peacock JD, Huk DJ, Both SN, Purcell NH, Pinto JR, Galantowicz ML, Koch M, Lucchesi PA, Birk DE, Lincoln J. Collagen XIV is important for growth and structural integrity of the myocardium. J Mol Cell Cardiol 2012; 53:626-38. [PMID: 22906538 DOI: 10.1016/j.yjmcc.2012.08.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2012] [Revised: 07/20/2012] [Accepted: 08/04/2012] [Indexed: 01/01/2023]
Abstract
Collagen XIV is a fibril-associated collagen with an interrupted triple helix (FACIT). Previous studies have shown that this collagen type regulates early stages of fibrillogenesis in connective tissues of high mechanical demand. Mice null for Collagen XIV are viable, however formation of the interstitial collagen network is defective in tendons and skin leading to reduced biomechanical function. The assembly of a tightly regulated collagen network is also required in the heart, not only for structural support but also for controlling cellular processes. Collagen XIV is highly expressed in the embryonic heart, notably within the cardiac interstitium of the developing myocardium, however its role has not been elucidated. To test this, we examined cardiac phenotypes in embryonic and adult mice devoid of Collagen XIV. From as early as E11.5, Col14a1(-/-) mice exhibit significant perturbations in mRNA levels of many other collagen types and remodeling enzymes (MMPs, TIMPs) within the ventricular myocardium. By post natal stages, collagen fibril organization is in disarray and the adult heart displays defects in ventricular morphogenesis. In addition to the extracellular matrix, Col14a1(-/-) mice exhibit increased cardiomyocyte proliferation at post natal, but not E11.5 stages, leading to increased cell number, yet cell size is decreased by 3 months of age. In contrast to myocytes, the number of cardiac fibroblasts is reduced after birth associated with increased apoptosis. As a result of these molecular and cellular changes during embryonic development and post natal maturation, cardiac function is diminished in Col14a1(-/-) mice from 3 months of age; associated with dilation in the absence of hypertrophy, and reduced ejection fraction. Further, Col14a1 deficiency leads to a greater increase in left ventricular wall thickening in response to pathological pressure overload compared to wild type animals. Collectively, these studies identify a new role for type XIV collagen in the formation of the cardiac interstitium during embryonic development, and highlight the importance of the collagen network for myocardial cell survival, and function of the working myocardium after birth.
Collapse
Affiliation(s)
- Ge Tao
- Molecular, Cell and Developmental Biology Graduate Program, Leonard M. Miller School of Medicine, Miami, FL 33101, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Improvement of Nerve Regeneration in Tissue-Engineered Skin Enriched with Schwann Cells. J Invest Dermatol 2009; 129:2895-900. [DOI: 10.1038/jid.2009.159] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
29
|
Sorrell JM, Caplan AI. Fibroblasts-a diverse population at the center of it all. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2009; 276:161-214. [PMID: 19584013 DOI: 10.1016/s1937-6448(09)76004-6] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The capacity of fibroblasts to produce and organize the extracellular matrix and to communicate with other cells makes them a central component of tissue biology. Even so, fibroblasts remain a somewhat enigmatic population. Our inability to fully comprehend these cells is in large part due to the paucity of unique cellular markers and to their pervasive diversity. Much of our understanding of fibroblast diversity has evolved from studies where subpopulations of these cells have been produced without resorting to cell surface markers. In this regard, cloning and mechanical separation of tissues prior to establishing cultures has provided multiple subpopulations. Nonetheless, in isolated situations, the expression or lack of expression of Thy-1/CD90 has been used to separate fibroblast subsets. The role of fibroblasts in intercellular communication is emerging through the implementation of organotypic studies in which three-dimensional fibroblast culture are combined with other populations of cells. Such studies have revealed critical paracrine loops that are essential for organ development and for wound repair. These studies also provide a backdrop for the emerging field of tissue engineering. The participation of fibroblasts in the regulation of tissue homeostasis and their contribution to the aging process are emerging issues that require better understanding. In short, fibroblasts represent a multifaceted, complex group of cells.
Collapse
Affiliation(s)
- J Michael Sorrell
- Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | | |
Collapse
|
30
|
Beaulieu MM, Tremblay PL, Berthod F. [Tissue-engineered models of the nervous system]. Med Sci (Paris) 2009; 25:288-92. [PMID: 19361393 DOI: 10.1051/medsci/2009253288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The nervous system is extraordinarily complex and exposed to various trauma and degenerative diseases that remain difficult to treat. To facilitate its study, in vitro models were developed by culturing neurons and glial cells in monolayer cultures, or through organotypic cultures of brain or spinal cord slices. These in vitro models were, and are still very helpful for the advancement of neurosciences. However, they are for some studies, either overly simplified, or too complex. The application of tissue engineering to neurosciences offers a new and highly versatile approach to develop accurate models of the nervous system. These models can be engineered in three-dimensions while choosing for each individual component, cellular and molecular, that will compose it. The level of complexity of the model can be adjusted from the simplest to the more complete as needed. For example, through the use of a three-dimensional tissue-engineered model of the spinal cord, it was possible to reproduce the process of myelin sheath formation around motor neuron axons for the first time in vitro. This breakthrough shows the promising potential of tissue engineering in the development of powerful in vitro models of the nervous system. The combination of these models with the use of human adult neurons and glial cells obtained from the differentiation of neural precursor cells isolated from accessible tissues from patients (skin, fat, bone marrow), opens promising perspectives to better understand -neurodegenerative diseases.
Collapse
Affiliation(s)
- Marie-Michèle Beaulieu
- Laboratoire d'organogenèse expérimentale, Centre de recherche FRSQ du CHA de Québec, Hôpital du Saint-Sacrement et Département de chirurgie, Faculté de médecine, Université Laval, Québec, Québec, Canada
| | | | | |
Collapse
|
31
|
Ansorge HL, Meng X, Zhang G, Veit G, Sun M, Klement JF, Beason DP, Soslowsky LJ, Koch M, Birk DE. Type XIV Collagen Regulates Fibrillogenesis: PREMATURE COLLAGEN FIBRIL GROWTH AND TISSUE DYSFUNCTION IN NULL MICE. J Biol Chem 2009; 284:8427-38. [PMID: 19136672 DOI: 10.1074/jbc.m805582200] [Citation(s) in RCA: 126] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Type XIV collagen is a fibril-associated collagen with an interrupted triple helix. This collagen interacts with the fibril surface and has been implicated as a regulator of fibrillogenesis; however, a specific role has not been elucidated. Functional roles for type XIV collagen were defined utilizing a new type XIV collagen-deficient mouse line. This line was produced using a conventional targeted knock-out approach. Col14a1(-/-) mice were devoid of type XIV collagen, whereas heterozygous mice had reduced synthesis. Both mutant Col14a1 genotypes were viable with a grossly normal phenotype; however, mature skin exhibited altered mechanical properties. Prior to evaluating tendon fibrillogenesis in type XIV collagen-deficient mice, the developmental expression patterns were analyzed in wild-type flexor digitorum longus (FDL) tendons. Analyses of mRNA and protein expression indicated tissue-specific temporal expression that was associated with the early stages in fibrillogenesis. Ultrastructural analyses of wild-type and null tendons demonstrated premature fibril growth and larger fibril diameters in tendons from null mice at postnatal day 4 (P4). However, fibril structure in mature tendons was normal. Biomechanical studies established a direct structure/function relationship with reduced strength in P7-null tendons. However, the biomechanical properties in P60 tendons were comparable in null and wild-type mice. Our results indicate a regulatory function for type XIV collagen in early stages of collagen fibrillogenesis with tissue differences.
Collapse
Affiliation(s)
- Heather L Ansorge
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Auxenfans C, Builles N, Andre V, Lequeux C, Fievet A, Rose S, Braye FM, Fradette J, Janin-Manificat H, Nataf S, Burillon C, Damour O. [Porous matrix and primary-cell culture: a shared concept for skin and cornea tissue engineering]. ACTA ACUST UNITED AC 2008; 57:290-8. [PMID: 18602223 DOI: 10.1016/j.patbio.2008.04.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2008] [Accepted: 04/16/2008] [Indexed: 11/30/2022]
Abstract
Skin and cornea both feature an epithelium firmly anchored to its underlying connective compartment: dermis for skin and stroma for cornea. A breakthrough in tissue engineering occurred in 1975 when skin stem cells were successfully amplified in culture by Rheinwald and Green. Since 1981, they are used in the clinical arena as cultured epidermal autografts for the treatment of patients with extensive burns. A similar technique has been later adapted to the amplification of limbal-epithelial cells. The basal layer of the limbal epithelium is located in a transitional zone between the cornea and the conjunctiva and contains the stem cell population of the corneal epithelium called limbal-stem cells (LSC). These cells maintain the proper renewal of the corneal epithelium by generating transit-amplifying cells that migrate from the basal layer of the limbus towards the basal layer of the cornea. Tissue-engineering protocols enable the reconstruction of three-dimensional (3D) complex tissues comprising both an epithelium and its underlying connective tissue. Our in vitro reconstruction model is based on the combined use of cells and of a natural collagen-based biodegradable polymer to produce the connective-tissue compartment. This porous substrate acts as a scaffold for fibroblasts, thereby, producing a living dermal/stromal equivalent, which once epithelialized results into a reconstructed skin/hemicornea. This paper presents the reconstruction of surface epithelia for the treatment of pathological conditions of skin and cornea and the development of 3D tissue-engineered substitutes based on a collagen-GAG-chitosan matrix for the regeneration of skin and cornea.
Collapse
Affiliation(s)
- C Auxenfans
- Banque de tissus et cellules, hôpital Edouard-Herriot, HCL, pavillon I, 5, place d'Arsonval, 69437 Lyon cedex 03, France.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Bechetoille N, Dezutter-Dambuyant C, Damour O, André V, Orly I, Perrier E. Effects of Solar Ultraviolet Radiation on Engineered Human Skin Equivalent Containing Both Langerhans Cells and Dermal Dendritic Cells. ACTA ACUST UNITED AC 2007; 13:2667-79. [PMID: 17883323 DOI: 10.1089/ten.2006.0405] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Exposure of human skin to solar ultraviolet (UV) light induces local and systemic immune suppression. It is known that alterations of immune functions of Langerhans cells (LCs) and dermal dendritic cells (DDCs) mediate this phenomenon. The purpose of this study was to mimic in vitro the early UV-induced skin disruption to better understand the involvement of the skin micro-environment in triggering this immunosuppressive state. We therefore developed skin equivalents (SEs) integrating LCs and DDCs derived from monocytes (mo-LCs and mo-DDCs, respectively). First, we showed that Langerin(+) mo-LC and dendritic cell (DC)-specific ICAM-3 grabbing nonintegrin (SIGN)(+) mo-DDCs were immunolocalized in situ in epidermal and dermal compartments of SEs, respectively. The SE micro-environment without immune cells displayed full cytokine profile that may ensure and maintain differentiation, localization, and immaturity of LCs and DDCs in situ, as shown by secretion of granulocyte-macrophage colony-stimulating factor, transforming growth factor beta (beta)-1, interleukin (IL)-4, IL-13, and IL-15 involved in cell differentiation; presence of complete chemokine network as macrophage inflammatory protein 3 alpha (alpha); low secretion of pro-inflammatory cytokines tumor necrosis factor alpha (TNF-alpha), IL-1 beta, IL-6, and IL-8; and surprising secretion of immunosuppresive cytokine IL-10. Second, we demonstrated that skin micro-environment homeostasis was greatly disrupted under solar UV irradiation of SEs. In fact, we showed a pro-inflammatory state characterized by high secretion of TNF-alpha, IL-1 beta, IL-6, and IL-8 and low secretion of IL-10. This breakdown of immune homeostasis was visualized at the same time as in situ migration of mo-LCs and mo-DDCs into the dermal equivalent of SEs. Moreover, this tissue migration of mo-LCs and mo-DDCs into SEs was in accordance with the chemokine (C-C motif) receptor 7 expression and the DC-lysosome-associated membrane glycoprotein acquisition only on mo-LCs. Our results highlighted major participation of the skin micro-environment in the triggering and modulating of UV-induced skin immune responses. In addition, it could be concluded that these SEs are reliable tools for modeling biological events inaccessible in humans.
Collapse
|
34
|
Lacroix S, Bouez C, Vidal S, Cenizo V, Reymermier C, Justin V, Vicanová J, Damour O. Supplementation with a complex of active nutrients improved dermal and epidermal characteristics in skin equivalents generated from fibroblasts from young or aged donors. Biogerontology 2006; 8:97-109. [PMID: 17028931 DOI: 10.1007/s10522-006-9037-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2006] [Accepted: 07/23/2006] [Indexed: 11/25/2022]
Abstract
Cultured skin equivalent (SE, Mimeskin) was generated by co-culturing skin fibroblasts and keratinocytes on a collagen-glycosaminoglycan-chitosan dermal substrate. In order to examine donor age effect, fibroblasts from 19- (young) or 49- (aged) year-old females were used. Culture medium was supplemented with nutrients complex containing soy extract, tomato extract, grape seed extract, white tea extract, sodium ascorbate, tocopherol acetate, zinc gluconate and BioMarine complex. Epidermal and dermal structure and composition were examined after 42 and 60 days of culture. In untreated samples, SE generated from young fibroblasts was superior to SE from aged fibroblasts in all characteristics. Those include number and regularity of keratinocyte layers, number of keratinocytes expressing proliferation marker Ki67, content of collagen type I, fibrillin-1, elastin, and SE lifespan. Effects of nutritional supplementation were observed in SE from both young and aged fibroblasts, however, those effects were more pronounced in SE from aged fibroblasts. In epidermis, the treatment increased number of keratinocyte layers and delayed epidermal senescence. The number of cells expressing Ki67 was nine folds higher than those of controls, and was similar to that of young cell SE. In dermis, the treatment increased mRNA synthesis of collagen I, fibrillin-1 and elastin. In conclusion, skin cell donor age had major important effect on formation of reconstructed SE. Imperfections in epidermal and dermal structure and composition as well as life span in SE from aged cells can be improved by supplementation with active nutrients.
Collapse
Affiliation(s)
- Sophie Lacroix
- Banque de Tissus et Cellules, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Caissie R, Gingras M, Champigny MF, Berthod F. In vivo enhancement of sensory perception recovery in a tissue-engineered skin enriched with laminin. Biomaterials 2006; 27:2988-93. [PMID: 16448695 DOI: 10.1016/j.biomaterials.2006.01.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2005] [Accepted: 01/11/2006] [Indexed: 11/19/2022]
Abstract
The use of autologous reconstructed skin appears to be a promising treatment for the permanent coverage of deep and extensive burns. However, the capability of reconstructed skin transplanted on wounds to promote recovery of sensory perception is a major concern. Our aim was to assess the effect of laminin on cutaneous nerve regeneration. We prepared collagen-chitosan sponges enriched with 0, 1, 10 or 50 microg of laminin/sponge to produce tissue-engineered reconstructed skins by culture of human fibroblasts and keratinocytes, then grafted on the back of athymic mice for 120 days. Immunohistochemical studies demonstrated that there were 7 times more neurofilament 150 kD-positive nerve fibers migrating in the graft in the samples enriched with 10 microg laminin/sponge, compared to reconstructed skin without laminin, 120 days after graft. A significant improvement in the current perception threshold of the Abeta and Adelta nerve fibers was measured using a Neurometer in all grafts enriched with laminin. In addition, the type C nerve fibers reached an identical current perception threshold than mouse skin, in all reconstructed skins enriched or not with laminin. We conclude that the use of a tissue-engineered autologous skin graft enriched with laminin has the potential to efficiently optimize cutaneous sensory nerve regeneration in vivo.
Collapse
Affiliation(s)
- René Caissie
- Laboratoire d'organogénèse Expérimentale (LOEX), Centre hospitalier affilié universitaire de Québec, Hôpital du St-Sacrement, Département de chirurgie, Faculté de médecine, Université Laval, Québec, Qué., Canada G1S 4L8
| | | | | | | |
Collapse
|
36
|
Ruehl M, Erben U, Schuppan D, Wagner C, Zeller A, Freise C, Al-Hasani H, Loesekann M, Notter M, Wittig BM, Zeitz M, Dieterich W, Somasundaram R. The elongated first fibronectin type III domain of collagen XIV is an inducer of quiescence and differentiation in fibroblasts and preadipocytes. J Biol Chem 2005; 280:38537-43. [PMID: 16129687 DOI: 10.1074/jbc.m502210200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Collagen XIV (CXIV) is a fibril-associated collagen that is mainly expressed in well differentiated tissues and in late embryonic development. Because CXIV is almost absent in proliferating and/or dedifferentiated tissues, a functional role in maintaining cell differentiation is suspected. We demonstrate antiproliferative, quiescence- and differentiation-inducing effects of human CXIV and its recombinant fragments on mesenchymal cells. In primary human fibroblasts, in mouse 3T3 fibroblasts and in 3T3-L1 preadipocytes, CXIV reduced de novo DNA synthesis by 75%, whereas cell numbers and viability remained unaltered. Cells showed no signs of apoptosis, and maximal proliferation was restored when serum was supplemented, thus indicating that CXIV induced reversible cellular quiescence. Exposure of fibroblasts to CXIV in vitro led to cellular bundles and clusters. CXIV also triggered trans-differentiation of 3T3-L1 preadipocytes into adipocytes, as could be shown by lipid accumulation and by expression of the glucose transporter Glut4. These effects were also observed with the amino-terminal recombinant fragment Gln(29)-Pro(154) that harbors the first fibronectin type III domain and a 39-amino-acid extension, whereas no activity was found for all other recombinant CXIV fragments. Based on these finding the development of small molecular analogs that modulate fibroblast cell growth and differentiation, e.g. in wound healing and fibrosis, seems feasible.
Collapse
Affiliation(s)
- Martin Ruehl
- Department of Gastroenterology, Charité Campus, Benjamin Franklin, Hindenburgdamm 30, 12200 Berlin, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Black AF, Bouez C, Perrier E, Schlotmann K, Chapuis F, Damour O. Optimization and Characterization of an Engineered Human Skin Equivalent. ACTA ACUST UNITED AC 2005; 11:723-33. [PMID: 15998214 DOI: 10.1089/ten.2005.11.723] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Skin equivalents (SEs) have been designed to meet both basic and applied research needs. The successful application of tissue-engineered SEs requires that the reconstituted tissues be endowed with the correct organization and function. A large body of experimental evidence now supports the notion that the inducing effects of mesenchymal tissue on epithelial cell morphogenesis are mediated, at least in part, by extracellular matrix components in addition to cell-cell interactions. A coculture model including both fibroblasts and keratinocytes was used to study the effects of progressive serum reduction on epidermal differentiation, quality of dermal and dermal-epidermal junctions, and expression of extracellular matrix proteins. The cells were successively added to a dermal substrate composed of collagen, glycosaminoglycans, and chitosan. The main aim of this study was to optimize this model for pharmacotoxicological trials. Control skin equivalents were cultured with medium containing 10% serum throughout the production process. Serum content was reduced to 1 and 0% at the air-liquid interface and compared with control skin equivalents. First, we demonstrated that serum deprivation at the air-liquid interface improves keratinocyte terminal differentiation. Second, we showed that, in the absence of serum, the specific characteristics of the SE are maintained, including epidermal and dermal ultrastructure, the expression of major dermal extracellular matrix components (human collagen types I, III, and V, fibronectin, elastin, and fibrillin 1), and the dermal-epidermal junction (laminin, human type IV collagen, alpha6 integrin). Furthermore, our results indicate that coculture models using keratinocytes and fibroblasts have both morphological and functional properties required for biologically useful tissues.
Collapse
Affiliation(s)
- Annie F Black
- Banque de Tissus et Cellules HCL, Laboratoire des Substituts Cutanés CNRS UPR-412, Hôpital Edouard Herriot, Lyon, France
| | | | | | | | | | | |
Collapse
|
38
|
Thierry L, Geiser AS, Hansen A, Tesche F, Herken R, Miosge N. Collagen types XII and XIV are present in basement membrane zones during human embryonic development. J Mol Histol 2005; 35:803-10. [PMID: 15609093 DOI: 10.1007/s10735-004-1132-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2004] [Revised: 05/10/2004] [Indexed: 11/28/2022]
Abstract
The collagens constitute a large group of proteins in the extracellular matrix that can be divided into several distinct families. Collagen types XII and XIV belong to a subgroup of non-fibrillar-collagens termed (fibril-associated collagens with interrupted triple-helices) (FACIT) and may be involved in basement membrane regulation providing specific molecular bridges between fibrils and other matrix components. However, the tissue distribution of the two proteins during human embryogenesis is still unclear. As a first step toward the elucidation of their possible cell biological functions, we compared the distribution of the two collagens during human organogenesis at the light microscopical level. We detected specific differences between the expression patterns of the two molecules, which may be related to their respective function within the basement membrane zones during human embryonic development. For example, in the developing intestine, collagen type-XII was present in the basement membrane zones of epithelia and endothelia. However, collagen type-XIV was restricted to the mesothelial basement membrane zones. We conclude that both collagens might well be able to serve different functions during human embryonic development although their structures are highly similar.
Collapse
Affiliation(s)
- Laurice Thierry
- Zentrum Anatomie, Abteilung Histologie, Kreuzbergring 36, 37075 Göttingen, Germany.
| | | | | | | | | | | |
Collapse
|
39
|
Gerecke DR, Meng X, Liu B, Birk DE. Complete primary structure and genomic organization of the mouse Col14a1 gene. Matrix Biol 2004; 22:595-601. [PMID: 15065570 DOI: 10.1016/j.matbio.2003.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The entire mouse cDNA sequence for type XIV collagen was determined using overlapping PCR products. The 6456 nucleotide (nt) cDNA sequence contains a 5391-nt open reading frame encoding 1797 amino acid residues. The amino terminus has a 28-residue signal peptide that is followed by the mature polypeptide of 1769 amino acid residues with a calculated molecular mass of 193.2 kDa. The mouse alpha1(XIV) collagen chain is predicted to contain all the structural domains described for the polypeptide in chicken and human. These include fibronectin type III repeats, von Willebrand factor A domains, thrombospondin-N-terminal-like domains and two triple-helical domains similar to those of other collagen family members. The amino acid residue sequence of human alpha1(XIV) collagen showed an overall identity of 74% to the chicken sequence and 88% to the human sequence. The entire mouse genomic structure has been determined and is made up of 48 exons. Alternatively spliced forms of mouse type XIV, collagen were not identified corresponding to the findings for the human form.
Collapse
Affiliation(s)
- Donald R Gerecke
- Department of Pharmacology and Toxicology, Environmental and Occupational Health Sciences Institute, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08854, USA
| | | | | | | |
Collapse
|
40
|
Tahara K, Aso H, Yamasaki T, Rose MT, Takasuga A, Sugimoto Y, Yamaguchi T, Tahara K, Takano S. Cloning and expression of type XII collagen isoforms during bovine adipogenesis. Differentiation 2004; 72:113-22. [PMID: 15157235 DOI: 10.1111/j.1432-0436.2004.07204006.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In order to isolate candidate genes involved in bovine adipocyte differentiation, we have constructed a subtraction library from a clonal bovine intra-muscular pre-adipocyte (BIP) cell line using the suppression subtractive hybridization method. We have isolated a set of subtracted cDNA fragments whose respective mRNA levels are up-regulated during the adipogenic differentiation of BIP cells, and cloned cDNAs from a differentiated BIP-lambda ZAP II cDNA library. Two cDNA clones were highly homologous to the sequence of mouse and human type XII collagen alpha-1, determined by a BLAST homology search. As type XII collagen has been reported to have four types of splicing isoform, two clones were determined to be XII-1 and XII-2 splicing isoforms, respectively, because of a difference in the C-terminal NC1 domain. From the expression analysis of type XII collagen, the XIIA-2 isoform was mainly expressed in differentiated BIP cells and adipose tissues. Although the function of type XII collagen has not been established as yet, these results suggest that type XII collagen may be associated with adipocyte differentiation and adipose formation in cattle and is a potentially useful marker for adipogenesis.
Collapse
Affiliation(s)
- Koji Tahara
- Cellular Biology Laboratory, Faculty of Agriculture, Tohoku University, Sendai, 981-8555, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Abstract
Dermal fibroblasts are a dynamic and diverse population of cells whose functions in skin in many respects remain unknown. Normal adult human skin contains at least three distinct subpopulations of fibroblasts, which occupy unique niches in the dermis. Fibroblasts from each of these niches exhibit distinctive differences when cultured separately. Specific differences in fibroblast physiology are evident in papillary dermal fibroblasts, which reside in the superficial dermis, and reticular fibroblasts, which reside in the deep dermis. Both of these subpopulations of fibroblasts differ from the fibroblasts that are associated with hair follicles. Fibroblasts engage in fibroblast-epidermal interactions during hair development and in interfollicular regions of skin. They also play an important role in cutaneous wound repair and an ever-increasing role in bioengineering of skin. Bioengineered skin currently performs important roles in providing (1) a basic understanding of skin biology, (2) a vehicle for testing topically applied products and (3) a resource for skin replacement.
Collapse
Affiliation(s)
- J Michael Sorrell
- Skeletal Research Center, Biology Department, Case Western Reserve University, Cleveland, OH 44106, USA.
| | | |
Collapse
|
42
|
Moulin V, Goulet F, Berthod F, Germain L, Auger FA. [Tissue engineering: a tool to understand the physiological mechanisms]. Med Sci (Paris) 2003; 19:1003-10. [PMID: 14613015 DOI: 10.1051/medsci/200319101003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Tissue engineering is a new domain, which allows some very unique studies of many human physiological mechanisms. This technology, based on cell capacity to reproduce a three-dimensional tissue with or without the help of biomaterials, is an interesting approach to study cells in an environment quite similar to the in vivo context. This article summarizes the LOEX's (laboratory of experimental organogenesis) scientific endeavor in tissue engineering in order to better understand some physiological or pathological mechanisms. Thus wound healing, stem cells, graft vascularization and cell interactions are domains where tissue engineering has already made a significant impact.
Collapse
Affiliation(s)
- Véronique Moulin
- Laboratoire d'organogenèse expérimentale (LOEX), Hôpital du Saint-Sacrement, Centre hospitalier affilié universitaire de Québec, 1050, Chemin Sainte-Foy, Québec, Canada G1S 4L8
| | | | | | | | | |
Collapse
|
43
|
Gingras M, Bergeron J, Déry J, Durham HD, Berthod F. In vitro development of a tissue-engineered model of peripheral nerve regeneration to study neurite growth. FASEB J 2003; 17:2124-6. [PMID: 12958159 DOI: 10.1096/fj.02-1180fje] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A unique tissue-engineered model of peripheral nerve regeneration was developed in vitro to study neurite outgrowth. Mouse dorsal root ganglia neurons were seeded on a collagen sponge populated with human endothelial cells and/or human fibroblasts. Addition of nerve growth factor (NGF; 10 ng/ml) was not required for sensory neurons survival but was necessary to promote neurite outgrowth, as assessed by immunostaining of the 150 kDa neurofilament. A vigorous neurite elongation was detected inside the reconstructed tissue after 14 and 31 days of neurons culture, reaching up to 770 microm from day 14. Axons were often observed closely associated with the capillary-like tubes reconstructed in the model, in a similar pattern as in the human dermis. The presence of endothelial cells induced a significant increase of the neurite elongation after 14 days of culture. The addition of human keratinocytes totally avoided the twofold decrease in the amount of neurites observed between 14 and 31 days in controls. Besides the addition of NGF, axonal growth did not necessitate B27 supplement or glial cell coculture to be promoted and stabilized for long-term culture. Thus, this model might be a valuable tool to study the effect of various cells and/or attractive or repulsive molecules on neurite outgrowth in vitro.
Collapse
Affiliation(s)
- Marie Gingras
- Laboratoire d'Organogénèse Expérimentale, Université Laval, CHA, Hôpital du Saint-Sacrement, 1050 chemin Sainte-Foy, Québec, QC, Canada G1S 4L8
| | | | | | | | | |
Collapse
|
44
|
Hudon V, Berthod F, Black AF, Damour O, Germain L, Auger FA. A tissue-engineered endothelialized dermis to study the modulation of angiogenic and angiostatic molecules on capillary-like tube formation in vitro. Br J Dermatol 2003; 148:1094-104. [PMID: 12828735 DOI: 10.1046/j.1365-2133.2003.05298.x] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Because angiogenesis is a major feature of different physiological and pathological situations, the identification of factors that stimulate or inhibit this process and the elucidation of their mechanisms of action are most certainly of clinical relevance. We have produced a new model of endothelialized reconstructed dermis that promotes the spontaneous formation of a human capillary-like network and its stabilization in vitro for a period longer than 1 month. OBJECTIVES The aim of this work was to describe the three-dimensional structure of the capillary-like network. Thereafter we strove to study, quantitatively and qualitatively, the influence of angiogenic and angiostatic drugs on capillary-like tube (CLT) formation in vitro in the model. METHODS The endothelialized dermis was prepared by coculturing two human cell types, dermal fibroblasts and umbilical vein endothelial cells, in a collagen sponge biomaterial. RESULTS The visualization by confocal microscopy of the tubes present in the model showed that the endothelial structures were not cord-like but rather CLTs with well-defined lumina. Moreover, these tubes were organized in a complex network of branching structures. When angiogenic factors (vascular endothelial growth factor 10 ng mL-1 or basic fibroblast growth factor 10 ng mL-1) were added to the model, 1.8 and 1.4 times more capillaries, respectively, were observed, whereas the addition of progesterone (10 microg x mL(-1)) reduced by 2.4 times the number of tubes compared with the control. CONCLUSIONS These results suggest that this model is a highly efficient assay for the screening of potentially angiogenic and angiostatic compounds.
Collapse
Affiliation(s)
- V Hudon
- Laboratoire d'Organogenèse Expérimentale, Département de Chirurgie, Université Laval, CHA, Hôpital du Saint-Sacrement, 1050 Chemin Sainte-Foy, Québec, Canada, G1S 4L8
| | | | | | | | | | | |
Collapse
|
45
|
Gerecke DR, Meng X, Liu B, Birk DE. Complete primary structure and genomic organization of the mouse Col14a1 gene. Matrix Biol 2003; 22:209-16. [PMID: 12853031 DOI: 10.1016/s0945-053x(03)00021-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The entire mouse cDNA sequence for type XIV collagen was determined using overlapping PCR products. The 6456 nucleotide (nt) cDNA sequence contains a 5391-nt open reading frame encoding 1797 amino acid residues. The amino terminus has a 28-residue signal peptide that is followed by the mature polypeptide of 1769 amino acid residues with a calculated molecular mass of 193.2 kDa. The mouse alpha1(XIV) collagen chain is predicted to contain all the structural domains described for the polypeptide in chicken and human. These include fibronectin type III repeats, von Willebrand factor A domains, thrombospondin-N-terminal-like domains and two triple-helical domains similar to those of other collagen family members. The amino acid residue sequence of human alpha1(XIV) collagen showed an overall identity of 74% to the chicken sequence and 88% to the human sequence. The entire mouse genomic structure has been determined and is made up of 48 exons. Alternatively spliced forms of mouse type XIV, collagen were not identified corresponding to the findings for the human form.
Collapse
Affiliation(s)
- Donald R Gerecke
- Department of Pharmacology and Toxicology, Environmental and Occupational Health Sciences Institute, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08854, USA
| | | | | | | |
Collapse
|
46
|
Gingras M, Paradis I, Berthod F. Nerve regeneration in a collagen-chitosan tissue-engineered skin transplanted on nude mice. Biomaterials 2003; 24:1653-61. [PMID: 12559825 DOI: 10.1016/s0142-9612(02)00572-0] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A reconstructed skin made of a collagen-chitosan sponge seeded with human fibroblasts and keratinocytes and grown in vitro for 31 days was developed for the treatment of deep and extensive burns. The aim of this study was to assess whether this tissue-engineered skin could promote nerve regeneration in vivo, since recovery of sensation is a major concern for burnt patients. The human reconstructed skin was transplanted on the back of nude mice and the growth of nerve fibres within it was assessed 40, 60, 90 and 120 days after graft. Nerve growth was monitored by confocal microscopy using immunohistochemical staining of PGP 9.5 and 150 kD neurofilament, while Schwann cell migration was observed using protein S100 expression and laminin deposition. Nerve growth was first detected 60 days after transplantation and was more abundant 90 and 120 days after graft. Linear arrangements of Schwann cells were observed in the graft as early as 40 days after graft. Nerve growth was observed along these Schwann cell extensions 60 days after transplantation. We conclude that the three-dimensional architecture of the collagen-chitosan tissue-engineered skin sponge encourages nerve growth. This result provides new perspectives to increase nerve regeneration within the tissue-engineered skin by linkage of neurotrophic factors in the sponge before transplantation.
Collapse
Affiliation(s)
- Marie Gingras
- Laboratoire d'Organogenèse Expérimentale, Université Laval, CHA, Hôpital du Saint-Sacrement, 1050 chemin Sainte-Foy, Québec, Canada G1S 4L8
| | | | | |
Collapse
|
47
|
Tonello C, Zavan B, Cortivo R, Brun P, Panfilo S, Abatangelo G. In vitro reconstruction of human dermal equivalent enriched with endothelial cells. Biomaterials 2003; 24:1205-11. [PMID: 12527261 DOI: 10.1016/s0142-9612(02)00450-7] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Experiences coming from many cell-culture studies has brought about the concept that tissue and organ reconstruction should be performed in a three-dimensional environment as it normally occurs in vivo. As far as endothelial cell culture is concerned, it has been shown that angiogenesis can be successfully achieved only when cells are cultured in the presence of collagen-based matrices or basal membrane substrates. The aim of the present investigation is to demonstrate that human umbilical vein endothelial cells (HUVEC) can be grown and differentiated on an artificial dermis obtained by fibroblasts cultured on hyaluronic acid-based scaffolds. For this purpose, we have cultured HUVEC, retrieved by collagenase digestion of perfused human umbilical vein either alone and with fibroblast at 1/1 ratio into HYAFF-11 non-woven mesh. Cultures were maintained for up to 3 weeks. Samples were taken at different time points within this period for the MTT proliferation test and for immunohistochemical analysis. Our results demonstrate that hyaluronan-based biomaterials (HYAFF-11 NW mesh) represent a suitable substrate for HUVEC adhesion, proliferation and reorganization in microcapillary network.
Collapse
Affiliation(s)
- C Tonello
- Department of Histology, Microbiology and Medical Biotechnology, University of Padova, Viale G. Colombo 3, 1-35121, Padova, Italy
| | | | | | | | | | | |
Collapse
|
48
|
Auger FA, Rémy-Zolghadri M, Grenier G, Germain L. A truly new approach for tissue engineering: the LOEX self-assembly technique. ERNST SCHERING RESEARCH FOUNDATION WORKSHOP 2002:73-88. [PMID: 11816275 DOI: 10.1007/978-3-662-04816-0_6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- F A Auger
- Laboratoire d'Organogénèse Expérimentale/LOEX, Hôpital du Saint-Sacrement, Department of Surgery, Faculty of Medicine, Laval University, Québec City, Québec G1S 4L8, Canada
| | | | | | | |
Collapse
|
49
|
Germain L, Goulet F, Moulin V, Berthod F, Auger FA. Engineering human tissues for in vivo applications. Ann N Y Acad Sci 2002; 961:268-70. [PMID: 12081915 DOI: 10.1111/j.1749-6632.2002.tb03099.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lucie Germain
- LOEX, Hôpital du Saint-Sacrement du CHA, 1050 Chemin Sainte-Foy, Québec, QC G1S 4L8, Canada.
| | | | | | | | | |
Collapse
|
50
|
Arai K, Kasashima Y, Kobayashi A, Kuwano A, Yoshihara T. TGF-beta alters collagen XII and XIV mRNA levels in cultured equine tenocytes. Matrix Biol 2002; 21:243-50. [PMID: 12009330 DOI: 10.1016/s0945-053x(02)00005-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The effects of TGF-beta 1, beta 2 and beta 3 (TGF-beta) on levels of mRNA corresponding to the alpha chains of type XII and type XIV collagens in equine tenocyte cultures were assessed using the ribonuclease protection assay (RPA). The level of alpha1(XII) mRNA in untreated monolayer cultures was approximately 50- to 100-fold greater than alpha1(XIV) mRNA level. Addition of TGF-beta resulted in an increase in the amount of alpha1(XII) present and a decrease of alpha1(XIV) mRNA in a dose-dependent manner. Specifically, the level of alpha1(XII) mRNA was doubled, but alpha1(XIV) was decreased to 30% of control by the addition of 2 ng/ml of TGF-beta 1 to the cultures. These effects were completely abrogated by neutralizing antibody specific for TGF-beta. In addition, electron microscopy demonstrated that bundled collagen fibers were formed in the intercellular spaces of multilayered tenocytes which had been cultured for 2 weeks in the presence of exogenous TGF-beta 1 together with ascorbic acid phosphate. These results suggest that type XII and/or type XIV collagens modulate the structure of ECM formed by tenocytes in culture.
Collapse
Affiliation(s)
- Katsuhiko Arai
- Department of Tissue Physiology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-7509, Japan.
| | | | | | | | | |
Collapse
|