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Fetal healing

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https://www.readbyqxmd.com/read/28062236/enhanced-wound-healing-activity-of-desert-locust-schistocerca-gregaria-vs-shrimp-penaeus-monodon-chitosan-based-scaffolds
#1
Narguess H Marei, W El-Mazny, Aida El-Shaer, Kareem Dorri Zaki, Zahra S Hussein, Emtithal M Abd-El-Samie
Chitosan (CS) has received great attention in tissue engineering, especially in wound healing acceleration. In this study, chitin was isolated from desert locust (Schistocerca gregaria) and shrimp (Penaeus monodon) then deacetylated to chitosan. Then, chitosan was characterized by degree of deacetylation (DD), molecular weight (M.Wt), swelling index (SI), Fourier transform infrared (FTIR) and X ray diffraction (XRD). The chitosan was then casted into 2D scaffolds and was pictured using scanning electron microscope (SEM)...
January 3, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28017598/biodegradable-poly-%C3%AE%C2%B5-caprolactone-microcarriers-for-efficient-production-of-human-mesenchymal-stromal-cells-and-secreted-cytokines-in-batch-and-fed-batch-bioreactors
#2
Alan Tin-Lun Lam, Jian Li, Jessica Pei-Wen Toh, Eileen Jia-Hui Sim, Allen Kuan-Liang Chen, Jerry Kok-Yen Chan, Mahesh Choolani, Shaul Reuveny, William R Birch, Steve Kah-Weng Oh
Large numbers of human mesenchymal stromal cells (MSCs) used for a variety of applications in tissue engineering and cell therapy can be generated by scalable expansion in a bioreactor using microcarriers (MCs) systems. However, the enzymatic digestion process needed to detach cells from the growth surface can affect cell viability and potentially the potency and differentiation efficiency. Thus, the main aim of our study was to develop biocompatible and biodegradable MCs that can support high MSC yields while maintaining their differentiation capability and potency...
December 22, 2016: Cytotherapy
https://www.readbyqxmd.com/read/28004279/in-vitro-cultured-fetal-fibroblasts-have-myofibroblast-associated-characteristics-and-produce-a-fibrotic-like-environment-upon-stimulation-with-tgf-%C3%AE-1-is-there-a-thin-line-between-fetal-scarless-healing-and-fibrosis
#3
M Walraven, J J Akershoek, R H J Beelen, M M W Ulrich
Transforming growth factor-β (TGF-β) is a cytokine occurring in three isoforms with an important function in development and wound healing. In wound healing, prolonged TGF-β signaling results in myofibroblast differentiation and fibrosis. In contrast, the developing second-trimester fetal skin contains high levels of all three TGF-β isoforms but still has the intrinsic capacity to heal without scarring. Insight into TGF-β signal transduction during fetal wound healing might lead to methods to control the signaling pathway during adult wound healing...
December 21, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28003934/stability-enhancement-using-hyaluronic-acid-gels-for-delivery-of-human-fetal-progenitor-tenocytes
#4
A Grognuz, C Scaletta, A Farron, D P Pioletti, W Raffoul, L A Applegate
Tendon afflictions are very common, and their negative impact is high both at the workplace and in leisure activities. Tendinopathies are increasing in prevalence and can lead to tendon ruptures, where healing is a long process with outcomes that are often disappointing. Human fetal progenitor tenocytes (hFPTs) have been recently tested in vitro as a potential cell source to stimulate tendon regeneration. The aim of the present study was to compare different commercial hyaluronic acid (HA) gels, which could be used to resuspend hFPTs in a formulation that would allow for good delivery of the cells...
December 3, 2016: Cell Medicine
https://www.readbyqxmd.com/read/27966782/impact-of-cryopreservation-on-caprine-fetal-adnexa-derived-stem-cells-and-its-evaluation-for-growth-kinetics-phenotypic-characterization-and-wound-healing-potential-in-xenogenic-rat-model
#5
Anjali Somal, Irfan A Bhat, Indu Baiju, Anuj Pratap Singh, Bibhudatta S K Panda, Perumal Arumugam Desingu, Sriti Pandey, Mukesh Kumar Bharti, Amar Pal, G Saikumar, Vikash Chandra, G Taru Sharma
This study was conducted to know the impact of cryopreservation on caprine fetal adnexa derived mesenchymal stem cells (MSCs) on the basic stem cell characteristics. Gravid caprine uteri (2-3 months) were collected from local abattoir to derive {amniotic fluid (cAF), amniotic sac (cAS), Wharton's jelly (cWJ) and cord blood (cCB)} MSCs and expanded in vitro. Cells were vitrified at 3(rd) passage (P3) using 10% DMSO. Post thaw viability and cellular properties were assessed. Cells were expanded to determine growth kinetics, tri-lineage differentiation, localization and molecular expression of MSCs and pluripotency markers; thereafter, these cells were transplanted in the full-thickness (2 × 2cm(2) ) rat skin wound to determine their wound healing potential...
December 14, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27955656/means-of-enhancing-bone-fracture-healing-optimal-cell-source-isolation-methods-and-acoustic-stimulation
#6
Corina Adriana Ghebes, Maaike Vera Jasmijn Braham, Adelgunde Veronica Clemens Maria Zeegers, Auke Jan Sijbe Renard, Hugo Fernandes, Daniel B F Saris
BACKGROUND: The human body has an extensive capacity to regenerate bone tissue after trauma. However large defects such as long bone fractures of the lower limbs cannot be restored without intervention and often lead to nonunion. Therefore, the aim of the present study was to assess the pool and biological functions of human mesenchymal stromal cells (hMSCs) isolated from different bone marrow locations of the lower limbs and to identify novel strategies to prime the cells prior to their use in bone fracture healing...
December 12, 2016: BMC Biotechnology
https://www.readbyqxmd.com/read/27943665/combination-therapy-of-autologous-adipose-mesenchymal-stem-cell-enriched-high-density-lipoaspirate-and-topical-timolol-for-healing-chronic-wounds
#7
Larissa Larsen, Catherine N Tchanque-Fossuo, Farzam Gorouhi, David Bodreault, Chuong Nguyen, Robert W Crawford, Sara E Dahle, Thomas Whetzel, R Rivkah Isseroff
Chronic venous leg ulcers are profoundly debilitating and result in billions of health care expenditures. Thus, there is a quest for engineered and innovative approaches. Herein we present a 63 year-old patient with a 30-year history of venous stasis and left lower extremity ulcers, which have been refractory to standard of care, anticoagulation, and venous stripping. The medial ulcer was treated with transplantation of autologous adipose mesenchymal stem cell (AMSC)-enriched, high density lipoaspirate (HDL) on OASIS wound matrix, and compression therapy...
December 12, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27903619/interleukin-10-mediated-regenerative-postnatal-tissue-repair-is-dependent-on-regulation-of-hyaluronan-metabolism-via-fibroblast-specific-stat3-signaling
#8
Swathi Balaji, Xinyi Wang, Alice King, Louis D Le, Sukanta S Bhattacharya, Chad M Moles, Manish J Butte, Vinicio A de Jesus Perez, Kenneth W Liechty, Thomas N Wight, Timothy M Crombleholme, Paul L Bollyky, Sundeep G Keswani
The cytokine IL-10 has potent antifibrotic effects in models of adult fibrosis, but the mechanisms of action are unclear. Here, we report a novel finding that IL-10 triggers a signal transducer and activator of transcription 3 (STAT3)-dependent signaling pathway that regulates hyaluronan (HA) metabolism and drives adult fibroblasts to synthesize an HA-rich pericellular matrix, which mimics the fetal regenerative wound healing phenotype with reduced fibrosis. By using cre-lox-mediated novel, inducible, fibroblast-, keratinocyte-, and wound-specific STAT3 knockdown postnatal mice-plus syngeneic fibroblast cell-transplant models-we demonstrate that the regenerative effects of IL-10 in postnatal wounds are dependent on HA synthesis and fibroblast-specific STAT3-dependent signaling...
November 30, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27882464/analysis-of-reparative-activity-of-platelet-lysate-effect-on-cell-monolayer-recovery-in-vitro-and-skin-wound-healing-in-vivo
#9
N S Sergeeva, Ya D Shanskii, I K Sviridova, P A Karalkin, V A Kirsanova, S A Akhmedova, A D Kaprin
Platelet lysate prepared from donor platelet concentrate and pooled according to a developed technique stimulates migration of multipotent mesenchymal stromal cells of the human adipose tissue and promotes healing of the monolayer defect in cultures of human fibroblasts and multipotent mesenchymal stromal cells in vitro in concentrations close those of fetal calf serum (5-10%). Lysate of platelets from platelet-rich rat blood plasma stimulated healing of the skin defect by promoting epithelialization and granulation tissue formation...
November 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27788827/in%C3%A2-vitro-effects-of-thymoglobulin-in-human-embryonic-kidney-cell-line-hek293-in-culture
#10
F Jurenec, K Mihovilović, K Špiranec, A Sinđić, M Knotek
BACKGROUND: Anti-thymocyte globulins are polyclonal T-cell-depleting immunoglobulins used in induction of immunosuppression in kidney transplant recipients. Thymoglobulin is purified rabbit immunoglobulin (Ig)G, obtained by immunization of rabbits with fetal human thymus, which depletes T lymphocytes by complement-dependent lysis and apoptosis, reduces production of cytokines, and decreases expression of adhesion molecules in endothelial cells. METHODS: To determine possible direct effects of Thymoglobulin on kidney cells during transplantation, we used the Human Embryonic Kidney cell line (HEK293) in culture...
October 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27774106/highly-efficient-in-vitro-reparative-behaviour-of-dental-pulp-stem-cells-cultured-with-standardised-platelet-lysate-supplementation
#11
Pasquale Marrazzo, Francesco Paduano, Francesca Palmieri, Massimo Marrelli, Marco Tatullo
Dental pulp is an accessible source of multipotent mesenchymal stromal cells (MSCs). The perspective role of dental pulp stem cells (DPSCs) in regenerative medicine demands an in vitro expansion and in vivo delivery which must deal with the safety issues about animal serum, usually required in cell culture practice. Human platelet lysate (PL) contains autologous growth factors and has been considered as valuable alternative to fetal bovine serum (FBS) in cell cultures. The optimum concentration to be added of such supplement is highly dependent on its preparation whose variability limits comparability of results...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27773739/basic-fibroblast-growth-factor-induces-angiogenic-properties-of-fibrocytes-to-stimulate-vascular-formation-during-wound-healing
#12
Miho Nakamichi, Yuri Akishima-Fukasawa, Chie Fujisawa, Tetsuo Mikami, Kiyoshi Onishi, Yoshikiyo Akasaka
The precise role of fibrocytes in angiogenesis in wounds remains unclear. We therefore demonstrated the specific changes in fibrocyte accumulation for angiogesis in basic fibroblast growth factor (bFGF)-treated wounds. bFGF-treated wounds exhibited marked formation of arterioles and inhibition of podoplanin(+) lymph vessels that were lacking in vascular endothelial growth factor-A-treated wounds. Real-time PCR in bFGF-treated wounds manifested enhanced expression of CD34, CD31, and bFGF mRNA and reduced expression of podoplanin and collagen type I, III, and IV mRNA...
October 20, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27769742/all-trans-retinoic-acid-promotes-wound-healing-of-primary-amniocytes-through-the-induction-of-loxl4-a-member-of-the-lysyl-oxidase-family
#13
Marion Rouzaire, Aurélie Comptour, Corinne Belville, Damien Bouvier, Gaël Clairefond, Flora Ponelle, Vincent Sapin, Denis Gallot, Loïc Blanchon
Thirty percent of preterm births directly result from preterm premature rupture of fetal membranes (PPROM). Clinical management currently proposes using a collagen plug to mechanically stop loss of amniotic fluid. Vitamin A and its active metabolite (retinoic acid) have well-known pro-healing properties and could thus make good candidates as a proposable adjuvant to this mechanical approach. Here we investigate the molecular mechanisms involved in the pro-healing properties of all-trans retinoic acid (atRA) in fetal membranes via an approach using an in vitro primary amniocyte wound model and transcriptomics...
December 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/27665369/fibromodulin-is-essential-for-fetal-type-scarless-cutaneous-wound-healing
#14
Zhong Zheng, Xinli Zhang, Catherine Dang, Steven Beanes, Grace X Chang, Yao Chen, Chen-Shuang Li, Kevin S Lee, Kang Ting, Chia Soo
In contrast to adult and late-gestation fetal skin wounds, which heal with scar, early-gestation fetal skin wounds display a remarkable capacity to heal scarlessly. Although the underlying mechanism of this transition from fetal-type scarless healing to adult-type healing with scar has been actively investigated for decades, in utero restoration of scarless healing in late-gestation fetal wounds has not been reported. In this study, using loss- and gain-of-function rodent fetal wound models, we identified that fibromodulin (Fm) is essential for fetal-type scarless wound healing...
November 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27568096/connexin-43-is-overexpressed-in-human-fetal-membrane-defects-after-fetoscopic-surgery
#15
David W Barrett, Anna L David, Christopher Thrasivoulou, Alvaro Mata, David L Becker, Alex C Engels, Jan A Deprest, Tina T Chowdhury
OBJECTIVE: We examined whether surgically induced membrane defects elevate connexin 43 (Cx43) expression in the wound edge of the amniotic membrane (AM) and drives structural changes in collagen that affects healing after fetoscopic surgery. METHOD: Cell morphology and collagen microstructure was investigated by scanning electron microscopy and second harmonic generation in fetal membranes taken from women who underwent fetal surgery. Immunofluoresence and real-time quantitative polymerase chain reaction was used to examine Cx43 expression in control and wound edge AM...
October 2016: Prenatal Diagnosis
https://www.readbyqxmd.com/read/27554806/hyaluronan-in-medical-practice
#16
REVIEW
Katarína Valachová, Nicola Volpi, Robert Stern, Ladislav Soltes
Hyaluronan is the major extracellular matrix glycosaminoglycan polymer present in vertebrate tissues, with a molar mass that can reach several megaDaltons. It is particularly prominent in the matrix of tissues undergoing rapid turnover, in fetal tissues, and wherever regeneration and repair are occurring. Hyaluronan has highly varied biological functions often dependent on molar mass, however they are highly dependent on source of hyaluronan, its purity and nature of contaminants. Hyaluronan of highmolar- mass is known for its anti-angiogenic, anti-inflammatory and immunosuppressive properties, unlike hyaluronan of low-molar-mass that has the opposite effects...
2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27530920/pigment-epithelium-derived-factor-upregulates-expression-of-vascular-endothelial-growth-factor-by-human-mesenchymal-stem-cells-possible-role-in-pedf-regulated-matrix-mineralization
#17
Feng Li, Gillian B Armstrong, Joyce Tombran-Tink, Christopher Niyibizi
Pigment epithelium-derived factor (PEDF) encoded by serpinf1 is a potent antiangiogenic factor found in a wide variety of fetal and adult tissues. Several reports have shown that lack of PEDF leads to osteogenesis imperfecta (OI) type VI whose hallmark is a defect in mineralization that leads to excessive osteoid build up that fails to mineralize. Because PEDF is antiangiogenic factor it would pose serious consequences on bone development and healing of fractures. To understand possible mechanisms by which PEDF plays a role in bone development and regulation of matrix mineralization, we determined the effects of exogenous PEDF on vascular endothelial growth factor (VEGF) expression by human mesenchymal stem cells (hMSCs) and mechanisms of its regulation by PEDF...
September 23, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27514438/fibroblast-growth-factor-and-vascular-endothelial-growth-factor-play-a-critical-role-in-endotheliogenesis-from-human-adipose-derived-stem-cells
#18
Sophia Khan, Miguel A Villalobos, Rachel L Choron, Shaohua Chang, Spencer A Brown, Jeffrey P Carpenter, Thomas N Tulenko, Ping Zhang
OBJECTIVE: Adipose-derived stem cells (ASCs) are a potential adult mesenchymal stem cell source for restoring endothelial function in patients with critical limb ischemia. Fibroblast growth factor 2 (FGF2) and vascular endothelial growth factor (VEGF) play a major role in angiogenesis and wound healing. This study evaluated the effects of FGF and VEGF on the proliferation, migration, and potential endothelial differentiation of human ASCs with regards to their use as endothelial cell substitutes...
August 8, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27510797/chemical-modification-of-extracellular-matrix-by-cold-atmospheric-plasma-generated-reactive-species-affects-chondrogenesis-and-bone-formation
#19
Peter Eisenhauer, Natalie Chernets, You Song, Danil Dobrynin, Nancy Pleshko, Marla J Steinbeck, Theresa A Freeman
The goal of this study was to investigate whether cold plasma generated by dielectric barrier discharge (DBD) modifies extracellular matrices (ECM) to influence chondrogenesis and endochondral ossification. Replacement of cartilage by bone during endochondral ossification is essential in fetal skeletal development, bone growth and fracture healing. Regulation of this process by the ECM occurs through matrix remodelling, involving a variety of cell attachment molecules and growth factors, which influence cell morphology and protein expression...
September 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27510554/the-methylome-and-transcriptome-of-fetal-skin-implications-for-scarless-healing
#20
Justyna Podolak-Popinigis, Anna Ronowicz, Monika Dmochowska, Agnieszka Jakubiak, Paweł Sachadyn
AIM: Fetal skin is known to heal without scarring. In mice, the phenomenon is observed until the 16-17 day of gestation - the day of transition from scarless to normal healing. The study aims to identify key methylome and transcriptome changes following the transition. MATERIALS & METHODS: Methylome and transcriptome profiles were analyzed in murine dorsal skin using microarray approach. RESULTS & CONCLUSION: The genes associated with inflammatory response and hyaluronate degradation showed increased DNA methylation before the transition, while those involved in embryonic morphogenesis, neuron differentiation and synapse functions did so after...
October 2016: Epigenomics
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