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Extracellular Dermal Matrix

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https://www.readbyqxmd.com/read/29135252/neo-clerodane-diterpenoids-from-salvia-polystachya-stimulate-the-expression-of-extracellular-matrix-components-in-human-dermal-fibroblasts
#1
Elihú Bautista, Naytzé Ortiz-Pastrana, Guillermo Pastor-Palacios, Angélica Montoya-Contreras, Rubén A Toscano, Jesús Morales-Jiménez, Luis A Salazar-Olivo, Alfredo Ortega
Eleven neo-clerodane diterpenoids (1-11) including the new analogues 1, 2, and 10, and 3',5,6,7-tetrahydroxy-4'-methoxyflavone (12) were isolated from the aerial parts of Salvia polystachya. Polystachyne G (1) and 15-epi-polystachyne G (2) were isolated as an epimeric mixture, containing a 5-hydroxyfuran-2(5H)-one unit in the side chain at C-12 of the neo-clerodane framework. Polystachyne H (10) contains a 1(10),2-diene moiety and a tertiary C-4 hydroxy group. The structures of these compounds were established by analysis of their NMR spectroscopic and MS spectrometric data...
November 14, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29130419/recapitulation-of-native-dermal-tissue-in-a-full-thickness-human-skin-model-using-human-collagens
#2
Arnout Mieremet, Marion Rietveld, Rianne van Dijk, Joke A Bouwstra, Abdoelwaheb El Ghalbzouri
OBJECTIVE: Full thickness skin models are comprised of a three dimensional dermal equivalent based on an animal derived collagen matrix that harbours fibroblasts and an epidermal equivalent formed by keratinocytes. The functionality of both equivalents is influenced by many factors, including extracellular matrix composition and resident cell type. Animal-derived collagens differ in amino acid composition and physico-chemical properties from human collagens. This composition could alter the functionality of the dermal equivalent and epidermal morphogenesis with the barrier formation in full thickness models (FTMs)...
November 12, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29129979/hair-germ-model-in-vitro-via-human-postnatal-keratinocyte-dermal-papilla-interactions-impact-of-hyaluronic-acid
#3
Ekaterina Kalabusheva, Vasily Terskikh, Ekaterina Vorotelyak
Hair follicle (HF) reconstruction in vitro is a promising field in alopecia treatment and human HF development research. Here, we combined postnatal human dermal papilla (DP) cells and skin epidermal keratinocytes (KCs) in a hanging drop culture to develop an artificial HF germ. The method is based on DP cell hair-inducing properties and KC self-organization. We evaluated two protocols of aggregate assembling. Mixed HF germ-like structures demonstrated the initiation of epithelial-mesenchymal interaction, including WNT pathway activation and expression of follicular markers...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29128530/cell-instructive-pectin-hydrogels-crosslinked-via-thiol-norbornene-photo-click-chemistry-for-skin-tissue-engineering
#4
Rúben F Pereira, Cristina C Barrias, Paulo J Bártolo, Pedro L Granja
Cell-instructive hydrogels are attractive for skin repair and regeneration, serving as interactive matrices to promote cell adhesion, cell-driven remodeling and de novo deposition of extracellular matrix components. This paper describes the synthesis and photocrosslinking of cell-instructive pectin hydrogels using cell-degradable peptide crosslinkers and integrin-specific adhesive ligands. Protease-degradable hydrogels obtained by photoinitiated thiol-norbornene click chemistry are rapidly formed in the presence of dermal fibroblasts, exhibit tunable properties and are capable of modulating the behavior of embedded cells, including the cell spreading, hydrogel contraction and secretion of matrix metalloproteases...
November 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29118355/decoy-wnt-receptor-slrp6e1e2-expressing-adenovirus-induces-anti-fibrotic-effect-via-inhibition-of-wnt-and-tgf-%C3%AE-signaling
#5
Won Jai Lee, Jung-Sun Lee, Hyo Min Ahn, Youjin Na, Chae Eun Yang, Ju Hee Lee, JinWoo Hong, Chae-Ok Yun
Aberrant activation of the canonical Wingless type (Wnt) signaling pathway plays a key role in the development of hypertrophic scars and keloids, and this aberrant activation of Wnt pathway can be a potential target for the development of novel anti-fibrotic agents. In this study, we evaluated the anti-fibrotic potential of a soluble Wnt decoy receptor (sLRP6E1E2)-expressing non-replicating adenovirus (Ad; dE1-k35/sLRP6E1E2) on human dermal fibroblasts (HDFs), keloid fibroblasts (KFs), and keloid tissue explants...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29102224/an-endogenous-tryptophan-photo-product-ficz-is-potentially-involved-in-photo-aging-by-reducing-tgf-%C3%AE-regulated-collagen-homeostasis
#6
Mika Murai, Gaku Tsuji, Akiko Hashimoto-Hachiya, Yoshihito Kawakami, Masutaka Furue, Chikage Mitoma
BACKGROUND: Persistent ultraviolet (UV) radiation in the form of sunlight causes photo-aging of the skin by reducing the production of type I collagen, the major constituent of the extracellular matrix of the dermis. Transforming growth factor (TGF)-β transforms dermal fibroblasts into α2-smooth muscle actin (ACTA2)-expressing myofibroblasts. Myofibroblasts produce a precursor form of type I collagen, type I procollagen (collagen I), consisting of pro-alpha1 (produced by the COL1A1 gene) and pro-alpha2 chains (produced by the COL1A2 gene)...
October 16, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29097850/middermal-elastolysis-dermal-fibroblasts-cooperate-with-inflammatory-cells-to-the-elastolytic-disorder
#7
Giovanna De Cunto, Arianna Lamberti, Maria Margherita de Santi, Clelia Miracco, Michele Fimiani, Giuseppe Lungarella, Eleonora Cavarra
Little is known about the cause and pathophysiology of middermal elastolysis (MDE). In this condition, variable inflammatory infiltrate may be present or not together with loss of elastic fibres in the middermis that spares both papillary and lower reticular dermis. MDE may be a consequence of abnormal extracellular matrix degradation related to an imbalance between elastolytic enzymes released from inflammatory and resident cells and their naturally occurring inhibitors. However, the cause of this imbalance is still an object of investigation...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29082378/porcine-dermal-collagen-prevents-seroma-formation-after-mastectomy-and-axillary-dissection-in-rats
#8
Cihan Ağalar, Ali İbrahim Sevinç, Anıl Aysal, Tufan Egeli, Özkan Süleyman Aksoy, Mehmet Ali Koçdor
OBJECTIVE: Seroma occurs as a result of accumulation lymphovascular liquid in the dead space forming after tissue dissection. It is the most common complication after breast surgery. Collagens are the common component of extracellular matrix and have an important role in wound healing. In this study, we aimed to investigate the efficiency of the Porcine Dermal Collagen in preventing Seroma. MATERIALS AND METHODS: Eighteen young female Wistar rats were used and divided into three groups...
October 2017: Eur J Breast Health
https://www.readbyqxmd.com/read/29079535/insights-into-the-key-roles-of-epigenetics-in-matrix-macromolecules-associated-wound-healing
#9
Zoi Piperigkou, Martin Götte, Achilleas D Theocharis, Nikos K Karamanos
Extracellular matrix (ECM) is a dynamic network of macromolecules, playing a regulatory role in cell functions, tissue regeneration and remodeling. Wound healing is a tissue repair process necessary for the maintenance of the functionality of tissues and organs. This highly orchestrated process is divided into four temporally overlapping phases, including hemostasis, inflammation, proliferation and tissue remodeling. The dynamic interplay between ECM and resident cells exerts its critical role in many aspects of wound healing, including cell proliferation, migration, differentiation, survival, matrix degradation and biosynthesis...
October 24, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/29076290/the-effect-of-plasma-rich-in-growth-factors-combined-with-follicular-unit-extraction-surgery-for-the-treatment-of-hair-loss-a-pilot-study
#10
Roge M Navarro, Ander Pino, Asunción Martinez-Andres, Consuelo Molina, Ana María Martinez, Nahikari Martinez, Gorka Orive, Eduardo Anitua
BACKGROUND: Hair transplant surgery using follicular unit extraction technique (FUE) is a common surgical procedure for the treatment of severe hair loss. Blood-derived autologous growth factors have also proved to promote hair regeneration in patients with different types of alopecia. AIMS: The aim of this study was to evaluate the safety and clinical efficacy of plasma rich in growth factors (PRGF) technology as an adjuvant therapy for FUE surgery in hair loss affected patients...
October 26, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29062588/tlr4-ligands-selectively-synergize-to-induce-expression-of-il-8
#11
Lauren M Valenty, Christine M Longo, Carol Horzempa, Anthony Ambesi, Paula J McKeown-Longo
Objective: Dysfunctional remodeling of the extracellular matrix contributes to the formation of TLR-dependent feed forward loops that drive chronic inflammation. We have previously shown that two Type III domains of Fibronectin, FnEDA and FnIII-1c, cooperate to induce the synergistic release of interleukin 8 (IL-8) from dermal fibroblasts. We now identify steps in the TLR4 pathway where synergy can be demonstrated as well as additional kinases functioning in fibronectin activation of TLR4 signaling. We also evaluate the ligand and cell-type specificity of this synergistic response...
October 1, 2017: Advances in Wound Care
https://www.readbyqxmd.com/read/29048241/nanofibrous-electrospun-hdecm-based-hybrid-scaffold-as-wound-dressing-for-reducing-scarring
#12
Tae Hee Kim, Youngmee Jung, Soo Hyun Kim
Produced via electrospinning, poly(l-lactide-co-caprolactone) (PLCL) membranes, which have a porous structure and are biodegradable, are of interest in various medical fields. The porous-structured electrospun membrane is particularly interesting because of several favorable properties: it exudes fluid from the wound, does not build up under the wound covering, and does not cause wound desiccation. Moreover, extracellular matrix (ECM)-based structures derived by tissue decellularization have application as engineered tissue scaffolds and as supports for cellular regeneration...
October 19, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29042658/exosomes-secreted-by-human-adipose-mesenchymal-stem-cells-promote-scarless-cutaneous-repair-by-regulating-extracellular-matrix-remodelling
#13
Lu Wang, Li Hu, Xin Zhou, Zehuan Xiong, Chenguang Zhang, Hassan M A Shehada, Bo Hu, Jinlin Song, Lili Chen
Scar formation is an intractable medical problem that appears after skin wounds have healed. Recent research has shown that exosomes secreted by human adipose mesenchymal stem cells (ASC-Exos) can benefit wound healing. To further explore the therapeutic potential of ASC-Exos, we investigated their effects on mitigating scar formation, and the underlying mechanisms of these effects. We found that intravenous injection of ASC-Exos decreased the size of scars and increased the ratio of collagen III to collagen I in murine incisional wounds...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29038968/anti-fibrotic-nintedanib-a-new-opportunity-for-systemic-sclerosis-patients
#14
REVIEW
Ana Catarina Duarte, Maria José Santos, Ana Cordeiro
Systemic sclerosis is a connective tissue disease characterized by progressive skin thickening and a wide spectrum of internal organ involvement. Pathogenesis includes vasculopathy, inflammation, and fibrosis. Although immunosuppressants such as cyclophosphamide and mycophenolate mofetil have shown some benefit in interstitial lung disease management, it is still a major cause of morbi-mortality in these patients. Therefore, there is a current need for new therapies. Here, we report a 65-year-old female patient with limited cutaneous systemic sclerosis, anti-topoisomerase-positive and extensive lung disease...
October 16, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/29038745/the-contractile-phenotype-of-dermal-fetal-fibroblasts-in-scarless-wound-healing
#15
Aron Parekh, Patricia A Hebda
PURPOSE OF REVIEW: Injured skin in the mammalian fetus can heal regeneratively due to the ability of fetal fibroblasts to effectively reorganize the extracellular matrix (ECM). This process occurs without fetal fibroblasts differentiating into highly contractile myofibroblasts which cause scarring and fibrosis in adult wounds. Here, we provide a brief review of fetal wound healing and the evidence supporting a unique contractile phenotype in fetal fibroblasts. Furthermore, we discuss the biomechanical role of the ECM in driving myofibroblast differentiation in wound healing and the implications for new clinical modalities based on the biophysical properties of fetal fibroblasts...
September 2017: Current Pathobiology Reports
https://www.readbyqxmd.com/read/29017145/synergetic-stimulation-of-nanostructure-and-chemistry-cues-on-behaviors-of-fibroblasts-and-endothelial-cells
#16
Zhi Wu, Yachen Xu, Haiyan Li
It has been widely accepted that cell behaviors can be affected by multiple kinds of biomaterial stimulation signals. Although many literatures have focused on studying the multiple biomaterials stimulatory cues in affecting cellular behaviors, systematic studies on the effects of individual and combination of multiple biomaterials stimulatory cues in regulating cellular behaviors and their potential possible mechanisms have rarely been reported. We hypothesized that tissue engineering scaffolds with enhanced bioactivity can be designed if synergetic effects between different kinds of biomaterial stimulation cues in affecting cells behaviors can be found and applied...
October 3, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28983623/microrna%C3%A2-378b-regulates-%C3%AE-%C3%A2-1%C3%A2-type-1-collagen-expression-via-sirtuin-6-interference
#17
Dahye Joo, Sungkwan An, Byung Gon Choi, Karam Kim, Young Min Choi, Kyu Joong Ahn, In-Sook An, Hwa Jun Cha
Ultraviolet (UV) light mediates skin aging and induces destruction of the dermis by modulating the expression levels of extracellular matrix‑associated genes, including collagen and matrix metalloproteinases. Sirtuin 6 (SIRT6), a member of the sirtuin family of proteins, regulates collagen metabolism and is an established anti‑aging protein. However, the exact underlying mechanism by which SIRT6 expression is regulated in dermal fibroblasts during the aging process is unclear. The present study demonstrated that expression of microRNA‑378b (miR‑378b) is induced in UVB‑exposed human dermal fibroblasts (HDFs), and this was inversely associated with the mRNA expression levels of α‑1‑type 1 collagen (COL1A1)...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28946661/anti-photoaging-effect-of-jeju-putgyul-unripe-citrus-extracts-on-human-dermal-fibroblasts-and-ultraviolet-b-induced-hairless-mouse-skin
#18
Seung-Hyun Choi, Sun-Il Choi, Tae-Dong Jung, Bong-Yeon Cho, Jin-Ha Lee, Seung-Hyung Kim, Seon-A Yoon, Young-Min Ham, Weon-Jong Yoon, Ju-Hyun Cho, Ok-Hawn Lee
Ultraviolet (UV) radiation stimulates the expression of matrix metalloproteinases (MMPs) and inflammatory cytokines. These signaling pathways participate in the degradation of the extracellular matrix and induce inflammatory responses that lead to photoaging. This study evaluated the antioxidant activity and the effect on MMPs and procollagen of putgyul extract in vitro. The anti-photoaging activity of putgyul extracts was estimated in vivo using hairless mice (HR-1). The putgyul extracts reduced MMP-1 production and increased the content of procollagen type I carboxy-terminal peptide in human dermal fibroblasts...
September 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28933697/enhanced-skin-regeneration-using-a-novel-amniotic-derived-tissue-graft
#19
Katie C Mowry, Paul P Bonvallet, Susan L Bellis
BACKGROUND: Chronic and recalcitrant wounds present a significant therapeutic challenge. Amniotic tissues contain many regenerative cytokines, growth factors, and extracellular matrix molecules including proteoglycans, hyaluronic acid, and collagens I, III, and IV. Dehydrated amnion/chorion grafts are currently used to treat a variety of wounds such as diabetic foot ulcers and burns. OBJECTIVE: The investigators hypothesized that processing methodologies, dehydration, and hypothermic processing and storage of amniotic tissues would affect overall quality of wound healing; they compared dehydrated amnion/chorion (dHACM) grafts to a novel hypothermically stored amniotic membrane (HSAM) graft in a full-thickness rat wound model...
September 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28916993/periostin-in-the-pathogenesis-of-skin-diseases
#20
REVIEW
Hiroyuki Murota, Yang Lingli, Ichiro Katayama
Skin is an organ that is susceptible to damage by external injury, chronic inflammation, and autoimmunity. Tissue damage causes alterations in both the configuration and type of cells in lesional skin. This phenomenon, called tissue remodeling, is a universal biological response elicited by programmed cell death, inflammation, immune disorders, and tumorigenic, tumor proliferative, and cytoreductive activity. In this process, changes in the components of the extracellular matrix are required to provide an environment that facilitates tissue remodeling...
December 2017: Cellular and Molecular Life Sciences: CMLS
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