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Extracellular Dermal Matrix

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https://www.readbyqxmd.com/read/29779986/photodynamic-therapy-corrects-abnormal-cancer-associated-gene-expression-observed-in-actinic-keratosis-lesions-and-induces-a-remodeling-effect-in-photodamaged-skin
#1
Florence Joly, Sophie Deret, Bastien Gamboa, Corinne Menigot, Paul Fogel, Carine Mounier, Pascale Reiniche, Farzaneh Sidou, Jérome Aubert, John Lear, Anthony A Fryer, Francesca Zolezzi, Johannes J Voegel
BACKGROUND: Actinic keratoses (AK) are proliferations of neoplastic keratinocytes in the epidermis resulting from cumulative exposure to ultraviolet radiation (UVR), which are liable to transform into squamous cell carcinoma (SCC). Organ Transplant Recipients (OTR) have an increased risk of developing SCC as a consequence of long-term immunosuppressive therapy. The aim of this study was to determine the molecular signature of AKs from OTR prior to treatment with methyl aminolevulinate-photodynamic therapy (MAL-PDT), and to assess what impact the treatment has on promoting remodeling of the photo-damaged skin...
May 17, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29771006/the-anti-fibrotic-effect-of-adenosine-a2b-receptor-antagonism-in-a-mouse-model-of-dermal-fibrosis
#2
Harry Karmouty-Quintana, Jose G Molina, Kemly Philip, Chiara Bellocchi, Brent Gudenkauf, Minghua Wu, Ning-Yuan Chen, Scott D Collum, Junsuk Ko, Sandeep K Agarwal, Shervin Assassi, Hongyan Zhong, Michael R Blackburn, Tingting Weng
OBJECTIVE: Systemic sclerosis (SSc - scleroderma) is a chronic disease that affects the skin and various internal organs. Dermal fibrosis is a major component of this disease. The mechanisms that promote dermal fibrosis remain elusive. Elevations in tissue adenosine levels and the subsequent engagement of the pro-fibrotic A2B adenosine receptor (ADORA2B) have been shown to regulate fibrosis in multiple organs including the lung, kidney and penis; however, the role of the ADORA2B in dermal fibrosis has not been investigated...
May 17, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29760951/molecular-functional-analyses-revealed-essential-roles-of-hsp90-and-lamin-a-c-in-growth-migration-and-self-aggregation-of-dermal-papilla-cells
#3
Kanchalit Thanomkitti, Kedsarin Fong-Ngern, Kanyarat Sueksakit, Rattapon Thuangtong, Visith Thongboonkerd
Previous expression study using quantitative proteomics has shown that immune-mediated pathway may not be the main mechanism inducing alopecia areata (AA). Nevertheless, functional impact of such expression data set remained unknown and unexplored. This study thus aimed to define potentially novel mechanisms of the AA pathogenesis by functional investigations of the differentially expressed proteins previously identified from lesional biopsies. From 122 altered proteins, protein-protein interactions network analysis revealed that downregulated heat shock protein 90 (HSP90) and lamin A/C served as the central nodes of protein-protein interactions involving in several crucial biological functions, including cytoskeleton organization, extracellular matrix organization, and tissue development...
2018: Cell Death Discovery
https://www.readbyqxmd.com/read/29760157/methyl-cpg-binding-protein-2-mediates-antifibrotic-effects-in-scleroderma-fibroblasts
#4
Ye He, Pei-Suen Tsou, Dinesh Khanna, Amr H Sawalha
OBJECTIVE: Emerging evidence supports a role for epigenetic regulation in the pathogenesis of scleroderma (SSc). We aimed to assess the role of methyl-CpG-binding protein 2 (MeCP2), a key epigenetic regulator, in fibroblast activation and fibrosis in SSc. METHODS: Dermal fibroblasts were isolated from patients with diffuse cutaneous SSc (dcSSc) and from healthy controls. MeCP2 expression was measured by qPCR and western blot. Myofibroblast differentiation was evaluated by gel contraction assay in vitro...
May 14, 2018: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29718653/silk-sponges-ornamented-with-placenta-derived-extracellular-matrix-augments-full-thickness-cutaneous-wound-healing-by-stimulating-neovascularization-and-cellular-migration
#5
Arun Prabhu Rameshbabu, Kamakshi Bankoti, Sayanti Datta, Elavarasan Subramani, Anupam Apoorva, Paulomi Ghosh, Priti Prasanna Maity, Padmavati Manchikanti, Koel Chaudhury, Santanu Dhara
Regeneration of full-thickness wound without scar formation is a multifaceted process which depends on in situ dynamic interactions between the tissue-engineered skin substitutes and newly formed reparative tissue. However, the majority of the tissue-engineered skin substitutes used so far in full-thickness wound healing cannot mimic the natural extracellular matrix (ECM) complexity and thus are incapable of providing a suitable niche for endogenous tissue repair. Herein, we demonstrated a simple approach to fabricate porous Hybrid Extracellular Matrix Sponges (HEMS) using Placental Extracellular Matrix (pECM) and Silk Fibroin (SF) for full-thickness wound healing...
May 2, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29707571/engineering-tissues-without-the-use-of-a-synthetic-scaffold-a-twenty-year-history-of-the-self-assembly-method
#6
REVIEW
Ingrid Saba, Weronika Jakubowska, Stéphane Bolduc, Stéphane Chabaud
Twenty years ago, Dr. François A. Auger, the founder of the Laboratory of Experimental Organogenesis (LOEX), introduced the self-assembly technique. This innovative technique relies on the ability of dermal fibroblasts to produce and assemble their own extracellular matrix, differing from all other tissue-engineering techniques that use preformed synthetic scaffolds. Nevertheless, the use of the self-assembly technique was limited for a long time due to its main drawbacks: time and cost. Recent scientific breakthroughs have addressed these limitations...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29705807/rapamycin-protects-skin-fibroblasts-from-ultraviolet-b-induced-photoaging-by-suppressing-the-production-of-reactive-oxygen-species
#7
Dengke Qin, Runjian Ren, Chuanlong Jia, Yongzhou Lu, Qingjian Yang, Liang Chen, Xinyuan Wu, Jingjing Zhu, Yu Guo, Ping Yang, Yiqun Zhou, Ningwen Zhu, Bo Bi, Tianyi Liu
BACKGROUND/AIMS: Ultraviolet B (UVB) irradiation alters multiple molecular pathways in the skin, thereby inducing skin photoaging. Murine dermal fibroblasts (MDFs) were subjected to a series of 4 sub-cytotoxic UVB doses (120 mJ/cm2), resulting in changes in cell shape, DNA damage, cell cycle arrest, extracellular matrix variations, reactive oxygen species (ROS) generation, and alterations in major intracellular antioxidant and cellular autophagy levels. Rapamycin (RAPA) is a new macrolide immunosuppressive agent that is primarily used in oncology, cardiology, and transplantation medicine and has been found to extend the lifespan of genetically heterogeneous mice...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29703420/tryptophan-photo-product-ficz-upregulates-ahr-mek-erk-mediated-mmp1-expression-implications-in-anti-fibrotic-phototherapy
#8
Mika Murai, Kazuhiko Yamamura, Akiko Hashimoto-Hachiya, Gaku Tsuji, Masutaka Furue, Chikage Mitoma
BACKGROUND: Scleroderma is caused by aberrant transforming growth factor-ß signaling. The degradation of extracellular matrix proteins is regulated by matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs). Ultraviolet (UV) radiation has been a therapy for scleroderma. 6-Formylindolo[3,2-b]carbazole (FICZ), an endogenous aryl hydrocarbon receptor (AHR) ligand, is a tryptophan metabolite generated by UV exposure. Nonetheless, whether FICZ regulates MMPs and TIMPs has not been investigated...
April 21, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29697102/differential-reorganisation-of-cutaneous-elastic-fibres-a-comparison-of-the-in-vivo-effects-of-broadband-ultraviolet-b-versus-solar-simulated-radiation
#9
Nisamanee Charoenchon, Lesley E Rhodes, Suzanne M Pilkington, Mark D Farrar, Rachel E B Watson
Long-term exposure of human skin to ultraviolet radiation (UVR) in sunlight negatively impacts its appearance and function with photoaged skin having a characteristic leathery, rough appearance, with deep wrinkles. These clinical features of photodamage are thought to result from UVR-induced remodelling of the dermal extracellular matrix, particularly the elastic fibre system. There are few in vivo human data on the impact of acute UVR exposure on this fibre system and particularly solar-simulated radiation (SSR)-mediated effects...
April 26, 2018: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/29691589/gene-expression-profiling-of-the-intact-dermal-sheath-cup-of-human-hair-follicles
#10
Shiro Niiyama, Yumiko Ishimatsu-Tsuji, Yosuke Nakazawa, Yuzo Yoshida, Tsutomu Soma, Ritsuro Ideta, Hideki Mukai, Jiro Kishimoto
Cells that constitute the dermal papillae of hair follicles might be derived from the dermal sheath, the peribulbar component of which is the dermal sheath cup. The dermal sheath cup is thought to include the progenitor cells of the dermal papillae and possesses hair inductive potential; however, it has not yet been well characterized. This study investigated the gene expression profile of the intact dermal sheath cup, and identified dermal sheath cup signature genes, including extracellular matrix components and BMP-binding molecules, as well as TGF-b1 as an upstream regulator...
April 24, 2018: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/29687742/amniotic-membrane-and-its-epithelial-and-mesenchymal-stem-cells-as-an-appropriate-source-for-skin-tissue-engineering-and-regenerative-medicine
#11
Behrouz Farhadihosseinabadi, Mehrdad Farahani, Tahereh Tayebi, Ameneh Jafari, Felor Biniazan, Khashayar Modaresifar, Hamideh Moravvej, Soheyl Bahrami, Heinz Redl, Lobat Tayebi, Hassan Niknejad
One of the main goals of tissue engineering and regenerative medicine is to develop skin substitutes for treating deep dermal and full thickness wounds. In this regard, both scaffold and cell source have a fundamental role to achieve exactly the same histological and physiological analog of skin. Amnion epithelial and mesenchymal cells possess the characteristics of pluripotent stem cells which have the capability to differentiate into all three germ layers and can be obtained without any ethical concern. Amniotic cells also produce different growth factors, angio-modulatory cytokines, anti-bacterial peptides and a wide range of anti-inflammatory agents which eventually cause acceleration in wound healing...
April 24, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29687080/multidomain-peptide-hydrogel-accelerates-healing-of-full-thickness-wounds-in-diabetic-mice
#12
Nicole C Carrejo, Amanda N Moore, Tania L Lopez Silva, David G Leach, I-Che Li, Douglas R Walker, Jeffrey D Hartgerink
In vivo, multidomain peptide (MDP) hydrogels undergo rapid cell infiltration and elicit a mild inflammatory response which promotes angiogenesis. Over time, the nanofibers are degraded and a natural collagen-based extracellular matrix is produced remodeling the artificial material into natural tissue. These properties make MDPs particularly well suited for applications in regeneration. In this work, we test the regenerative potential of MDP hydrogels in a diabetic wound healing model. When applied to full-thickness dermal wounds in genetically diabetic mice, the MDP hydrogel resulted in significantly accelerated wound healing compared to a clinically used hydrogel, as well as a control buffer...
2018: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29678305/the-effect-of-cilostazol-a-phosphodiesterase-3-pde3-inhibitor-on-human-hair-growth-with-the-dual-promoting-mechanisms
#13
Hye-In Choi, Dong Young Kim, Soon-Jin Choi, Chang-Yup Shin, Sungjoo Tommy Hwang, Kyu Han Kim, Ohsang Kwon
BACKGROUND: Cilostazol, a phosphodiesterase 3 (PDE3) inhibitor, increases the intracellular level of cyclic adenosine monophosphate to cause vasodilation. Topical application of cilostazol is reported to improve local blood flow and enhance wound healing; however, its effect on human hair follicles is unknown. OBJECTIVE: The purpose of this study was to determine the effect of cilostazol on hair growth. METHODS: We investigated the expression of PDE3 in human dermal papilla cells (DPCs), outer root sheath cells (ORSCs), and hair follicles...
April 11, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29671048/expression-of-matrix-metalloproteinase-2-and-metalloproteinase-9-in-the-skin-of-dogs-with-visceral-leishmaniasis
#14
Ana Paula Prudente Jacintho, Guilherme D Melo, Gisele F Machado, Paulo Henrique Leal Bertolo, Pamela Rodrigues Reina Moreira, Claudia Momo, Thiago A Souza, Rosemeri de Oliveira Vasconcelos
The skin is the first organ to be infected by the parasite in canine visceral leishmaniasis. The enzyme matrix metalloproteinase (MMP) acts towards degradation of the extracellular matrix (ECM) and modulation of the inflammatory response against many kinds of injuries. The aims of this study were to evaluate the expression of MMP-2 and MMP-9 through immunohistochemistry and zymography on the skin (muzzle, ears, and abdomen) of dogs that were naturally infected by Leishmania spp. and to compare these results with immunodetection of the parasite and with alterations to the dermal ECM...
April 18, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29658877/simulation-of-the-elastin-and-fibrillin-in-non-irradiated-or-uva-radiated-fibroblasts-and-direct-inhibition-of-elastase-or-matrix-metalloptoteinases-activity-by-nicotinamide-or-its-derivatives
#15
Neena Philips, Jovinna Chalensouk-Khaosaat, Salvador Gonzalez
Skin aging/photoaging is associated with altered the structure of collagen and elastin fibers, and increased activity of matrix metalloproteinases (MMP) and elastase. Nicotinamide and its derivatives, 2,6-dihydroxynicotinamide, 2,4,5,6-tetrahydroxynicotinamide, and 3-hydroxypicolinamide (collectively niacin derivatives) stimulate fibrillar collagen and heat shock proteins in dermal fibroblasts. The goal of this research was to extend the understanding of the anti-skin aging mechanism of these niacin derivatives through the stimulation of elastin (at the protein and promoter levels), fibrillin (1 and 2) in nonirradiated or ultraviolet (UVA) radiated dermal fibroblasts, and through the direct inhibition of MMP (1, 3, and 9) and elastase activities...
January 2018: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/29629370/effect-of-co-presentation-of-adhesive-ligands-and-short-hyaluronan-on-lymphendothelial-cells
#16
Christiane H Antoni, Yvonne McDuffie, Jochen Bauer, Jonathan P Sleeman, Heike Boehm
Controlled activation of lymphangiogenesis through functional biomaterials represents a promising approach to support wound healing after surgical procedures, yet remains a challenge. In a synthetic biological approach, we therefore set out to mimic the basal microenvironment of human primary dermal lymphatic endothelial cells (LECs) during lymphangiogenesis. As the extracellular matrix component hyaluronan (HA) regulates lymphangiogenesis, we designed a bifunctional surface in which adhesive peptide ligands and short HA oligosaccharides (sHA) tethered to nanoparticles are copresented to the basal side of LECs in a controlled, concentration-dependent manner...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29619069/-piper-retrofractum-vahl-extract-as-a-ppar-%C3%AE-and-ampk-activator-suppresses-uvb-induced-photoaging-through-mitochondrial-biogenesis-and-mmps-inhibition-in-human-dermal-fibroblasts-and-hairless-mice
#17
Jungon Yun, Changhee Kim, Mi-Bo Kim, Jae-Kwan Hwang
Photoaging occurs by UVB-irradiation and involves production of reactive oxygen species (ROS) and overexpression of matrix metalloproteinases (MMPs), leading to extracellular matrix damage. Piper retrofractum Vahl. is used as a traditional medicine for antiflatulence, expectorant, sedative, and anti-irritant; however, its antiphotoaging effect has not yet been studied. The current study investigated the antiphotoaging effect of standardized Piper retrofractum extract (PRE) on UVB-damaged human dermal fibroblasts and hairless mouse skin...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29614431/3d-cell-printing-of-in-vitro-stabilized-skin-model-and-in-vivo-pre-vascularized-skin-patch-using-tissue-specific-extracellular-matrix-bioink-a-step-towards-advanced-skin-tissue-engineering
#18
Byoung Soo Kim, Yang Woo Kwon, Jeong-Sik Kong, Gyu Tae Park, Ge Gao, Wonil Han, Moon-Bum Kim, Hyungseok Lee, Jae Ho Kim, Dong-Woo Cho
3D cell-printing technique has been under spotlight as an appealing biofabrication platform due to its ability to precisely pattern living cells in pre-defined spatial locations. In skin tissue engineering, a major remaining challenge is to seek for a suitable source of bioink capable of supporting and stimulating printed cells for tissue development. However, current bioinks for skin printing rely on homogeneous biomaterials, which has several shortcomings such as insufficient mechanical properties and recapitulation of microenvironment...
March 23, 2018: Biomaterials
https://www.readbyqxmd.com/read/29606302/bi-allelic-alterations-in-aebp1-lead-to-defective-collagen-assembly-and-connective-tissue-structure-resulting-in-a-variant-of-ehlers-danlos-syndrome
#19
Patrick R Blackburn, Zhi Xu, Kathleen E Tumelty, Rose W Zhao, William J Monis, Kimberly G Harris, Jennifer M Gass, Margot A Cousin, Nicole J Boczek, Mario V Mitkov, Mark A Cappel, Clair A Francomano, Joseph E Parisi, Eric W Klee, Eissa Faqeih, Fowzan S Alkuraya, Matthew D Layne, Nazli B McDonnell, Paldeep S Atwal
AEBP1 encodes the aortic carboxypeptidase-like protein (ACLP) that associates with collagens in the extracellular matrix (ECM) and has several roles in development, tissue repair, and fibrosis. ACLP is expressed in bone, the vasculature, and dermal tissues and is involved in fibroblast proliferation and mesenchymal stem cell differentiation into collagen-producing cells. Aebp1-/- mice have abnormal, delayed wound repair correlating with defects in fibroblast proliferation. In this study, we describe four individuals from three unrelated families that presented with a unique constellation of clinical findings including joint laxity, redundant and hyperextensible skin, poor wound healing with abnormal scarring, osteoporosis, and other features reminiscent of Ehlers-Danlos syndrome (EDS)...
April 5, 2018: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29590645/pkc%C3%AE%C2%B5-increases-extracellular-elastin-and-fibulin-5-dance-in-dermal-fibroblasts
#20
Tomoyuki Nishizaki
BACKGROUND/AIMS: In the earlier study, the selective PKCε activator DCP-LA increased elastic fibres in the dermis of HR-1 hairless mice. As a process of elastic fibre formation, tropoelastin, an elastin monomer, is secreted into the extracellular space. Secreted tropoelastin is delivered to the microfibrils by fibulin-5/developmental arteries and neural crest epidermal growth factor-like (DANCE) and undergoes self-association. Then, tropoelastin assembles around the microfibrils, growing into elastin and elastic fibres by lysyl oxidase (LOX)- or LOX-like (LOXL)-mediated cross-linking...
March 23, 2018: Cellular Physiology and Biochemistry
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