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https://www.readbyqxmd.com/read/28640957/restoration-of-cutaneous-pigmentation-by-transplantation-to-mice-of-isogeneic-human-melanocytes-in-dermal-epidermal-engineered-skin-substitutes
#1
Steven T Boyce, Christopher M Lloyd, Mark C Kleiner, Viki B Swope, Zalfa Abdel-Malek, Dorothy M Supp
Autologous engineered skin substitutes (ESS) containing melanocytes (hM) may restore pigmentation, and photoprotection after grafting to full-thickness skin wounds. In the current study, normal hM were isolated from discard skin, propagated with or without tyrosinase inhibitors, cryopreserved, recovered into culture, and added to ESS (ESS-P) before transplantation. ESS-P were incubated in either UCMC160/161 or UCDM1 medium, scored for hM densities, and grafted to mice. The results showed that: sufficient hM can be propagated to expand donor tissue by 100-fold; incubation of hM in tyrosinase inhibitors reduced pigment levels but did not change hM recovery after cryopreservation; hM densities in ESS-P were greater after incubation in UCDM1 than UCMC160 medium; hM were localized to the dermal-epidermal junction of ESS-P; and UCDM1 medium promoted earlier pigment distribution and density...
June 22, 2017: Pigment Cell & Melanoma Research
https://www.readbyqxmd.com/read/28629002/a-facile-synthesis-method-of-hydroxyethyl-cellulose-silver-nanoparticle-scaffolds-for-skin-tissue-engineering-applications
#2
Farah Hanani Zulkifli, Fathima Shahitha Jahir Hussain, Senait Sileshi Zeyohannes, Mohammad Syaiful Bahari Abdull Rasad, Mashitah M Yusuff
Green porous and ecofriendly scaffolds have been considered as one of the potent candidates for tissue engineering substitutes. The objective of this study is to investigate the biocompatibility of hydroxyethyl cellulose (HEC)/silver nanoparticles (AgNPs), prepared by the green synthesis method as a potential host material for skin tissue applications. The substrates which contained varied concentrations of AgNO3 (0.4%-1.6%) were formed in the presence of HEC, were dissolved in a single step in water. The presence of AgNPs was confirmed visually by the change of color from colorless to dark brown, and was fabricated via freeze-drying technique...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628684/megasessions-efficacy-of-fewer-longer-treatment-sessions-for-fat-reduction-in-noninvasive-body-contouring-using-a-radiofrequency-based-device
#3
Diane Duncan
<p>While the field of noninvasive body contouring is booming, many patients still note a lesser result than they might achieve with a single session of liposuction or dermolipectomy. The duration of a noninvasive fat reduction treatment series can be daunting. Patients have questioned the worth of these procedures when the expected benefit is modest and the time they devote to the project is significant. An eight-patient mini-study was performed to see if two or three "megasessions" could be substituted for eight weekly sessions of bipolar radiofrequency based fat reduction treatments...
May 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28615133/platelet-rich-plasma-with-keratinocytes-and-fibroblasts-enhance-healing-of-full-thickness-wounds
#4
Jia Xian Law, Shiplu Roy Chowdhury, Aminuddin Bin Saim, Ruszymah Bt Hj Idrus
Advances in tissue engineering led to the development of various tissue-engineered skin substitutes (TESS) for the treatment of skin injuries. The majority of the autologous TESS required lengthy and costly cell expansion process to fabricate. In this study, we determine the possibility of using a low density of human skin cells suspended in platelet-rich plasma (PRP)-enriched medium to promote the healing of full-thickness skin wounds. To achieve this, full-thickness wounds of size 1.767 cm(2) were created at the dorsum part of nude mice and treated with keratinocytes (2 × 10(4) cells/cm(2)) and fibroblasts (3 × 10(4) cells/cm(2)) suspended in 10% PRP-enriched medium...
June 7, 2017: Journal of Tissue Viability
https://www.readbyqxmd.com/read/28613256/strawberry-based-cosmetic-formulations-protect-human-dermal-fibroblasts-against-uva-induced-damage
#5
Massimiliano Gasparrini, Tamara Y Forbes-Hernandez, Sadia Afrin, Patricia Reboredo-Rodriguez, Danila Cianciosi, Bruno Mezzetti, Josè L Quiles, Stefano Bompadre, Maurizio Battino, Francesca Giampieri
Extreme exposure of skin to Ultraviolet A (UVA)-radiation may induce a dysregulated production of reactive oxygen species (ROS) which can interact with cellular biomolecules leading to oxidative stress, inflammation, DNA damage, and alteration of cellular molecular pathways, responsible for skin photoaging, hyperplasia, erythema, and cancer. For these reasons, the use of dietary natural bioactive compounds with remarkable antioxidant activity could be a strategic tool to counteract these UVA-radiation-caused deleterious effects...
June 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28610733/comparison-of-fortified-sfursat-and-passito-wines-produced-from-fresh-and-dehydrated-grapes-of-aromatic-black-cv-moscato-nero-vitis-vinifera-l
#6
Carolina Ossola, Simone Giacosa, Fabrizio Torchio, Susana Río Segade, Alberto Caudana, Enzo Cagnasso, Vincenzo Gerbi, Luca Rolle
Moscato nero d'Acqui is an Italian aromatic black winegrape variety characterized by a low content of anthocyanins (mostly tri-substituted), a satisfactory content of high molecular mass tannins, and a fair amount of terpenes. The grapes were subjected to a postharvest dehydration process under controlled thermohygrometric conditions (16-18°C, 55-70 RH%, 0.6m/s air speed) with the aim to produce three different special wine types (fortified, sfursat, and passito) from fresh, partially dehydrated (27°Brix), and withered (36°Brix) grapes, respectively...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28605372/a-component-resolved-diagnostic-approach-for-a-study-on-grass-pollen-allergens-in-chinese-southerners-with-allergic-rhinitis-and-or-asthma
#7
Wenting Luo, Guichang Pan, Huimin Huang, Peiyan Zheng, Nili Wei, Yifei Zhang, Guangqiao Zeng, Baoqing Sun
Sensitization to grass pollen imposes a global risk for allergic airway diseases. Although prevention relies on local investigation of the pollen allergens, data on this topic are limited in southern China. Any available data were obtained by self-report questionnaires, skin prick tests, and total or specific IgE tests using crude extracts. For many reasons, these methods are unreliable. Serum sIgE reactivity to Bermuda grass, Timothy grass, and Humulus scandens allergens in a cohort of patients from Greater Guangzhou (southern China's largest city and its outskirts) with allergic rhinitis and/or asthma were examined using a fully-automated immunoassay analyzer as a component-resolved diagnostics (CRD) tool...
June 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28605144/musculoskeletal-disease-in-mda5-related-type-i-interferonopathy-a-mendelian-mimic-of-jaccoud-s-arthropathy
#8
Luciana Martins de Carvalho, Gonza Ngoumou, Ji Woo Park, Nadja Ehmke, Nikolaus Deigendesch, Naoki Kitabayashi, Isabelle Melki, Flávio Falcäo L Souza, Andreas Tzschach, Marcello H Nogueira-Barbosa, Virgínia Ferriani, Paulo Louzada-Junior, Wilson Marques Junior, Charles M Lourenço, Prof Denise Horn, Tilmann Kallinich, Werner Stenzel, Sun Hur, Gillian I Rice, Yanick J Crow
Objectives To define the molecular basis of a multisystem phenotype with progressive musculoskeletal disease of the hands and feet including camptodactyly, subluxation and tendon rupture reminiscent of Jaccoud's arthropathy. Methods We ascertained two families segregating an autosomal dominant phenotype encompassing musculoskeletal disease and variable additional features including psoriasis, dental abnormalities, cardiac valve involvement, glaucoma and basal ganglia calcification. We measured the expression of interferon-stimulated genes in peripheral blood and skin, and undertook targeted Sanger sequencing of the IFIH1 gene encoding the cytosolic double-stranded RNA sensor MDA5...
June 12, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28602591/skin-grafts-from-genetically-modified-%C3%AE-1-3-galactosyltransferase-knockout-miniature-swine-a-functional-equivalent-to-allografts
#9
D A Leonard, C Mallard, A Albritton, R Torabi, M Mastroianni, D H Sachs, J M Kurtz, C L Cetrulo
Burn is associated with a considerable burden of morbidity worldwide. Early excision of burned tissue and skin grafting of the resultant wound has been established as a mainstay of modern burn therapy. However, in large burns, donor sites for autologous skin may be limited. Numerous alternatives, from cadaver skin to synthetic substitutes have been described, each with varying benefits and limitations. We previously proposed the use of genetically modified (alpha-1,3-galactosyl transferase knockout, GalT-KO) porcine skin as a viable skin alternative...
June 8, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28597935/failure-rates-of-artificial-dermis-products-in-treatment-of-diabetic-foot-ulcer-a-systematic-review-and-network-meta-analysis
#10
Huidi Tchero, Christian Herlin, Farid Bekara, Pauline Kangambega, Fluieraru Sergiu, Luc Teot
Diabetic foot ulcer (DFU) is a frequent complication in diabetic patients, occurring in up to 25% of those affected. Among the treatments available to clinicians, the use of bioengineered skin substitutes is an attractive alternative. Artificial dermis functions as a matrix, covering the wound and supporting healing and reconstruction of the lost tissue. This study was aimed at reviewing the use of five regeneration matrices (namely, Integra, Nevelia, Matriderm, Pelnac, and Renoskin) as reported by clinical trials...
June 8, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28585891/in%C3%A2-vitro-psoriasis-models-with-focus-on-reconstructed-skin-models-as-promising-tools-in-psoriasis-research
#11
Eline Desmet, Anesh Ramadhas, Jo Lambert, Mireille Van Gele
Psoriasis is a complex chronic immune-mediated inflammatory cutaneous disease associated with the development of inflammatory plaques on the skin. Studies proved that the disease results from a deregulated interplay between skin keratinocytes, immune cells and the environment leading to a persisting inflammatory process modulated by pro-inflammatory cytokines and activation of T cells. However, a major hindrance to study the pathogenesis of psoriasis more in depth and subsequent development of novel therapies is the lack of suitable pre-clinical models mimicking the complex phenotype of this skin disorder...
June 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28583228/diagnosing-environmental-allergies-comparison-of-skin-prick-intradermal-and-serum-specific-immunoglobulin-e-testing
#12
Denisa Ferastraoaru, Maria Shtessel, Elizabeth Lobell, Golda Hudes, David Rosenstreich, Gabriele de Vos
BACKGROUND: Allergists commonly perform intradermal skin testing (IDST) after negative skin-prick testing (SPT) to comprehensively diagnose environmental allergic sensitization. However, with the availability of modern methods to detect serum-specific immunoglobulin E (ssIgE), it is unclear if ssIgE testing could substitute for IDST. OBJECTIVE: To determine the efficacy of ssIgE testing and IDST when added to SPT in diagnosing environmental allergic sensitizations...
June 1, 2017: Allergy & Rhinology
https://www.readbyqxmd.com/read/28581065/physical-and-sensory-properties-of-gelatin-from-seabass-lates-calcarifer-as-affected-by-agar-and-%C3%AE%C2%BA-carrageenan
#13
Sittichoke Sinthusamran, Soottawat Benjakul, Yacine Hemar
Physical and sensory properties of gelatin from skin and swim bladder of seabass (SK and SW, respectively) as affected by agar or κ-carrageenan at 10 and 20% substitution were investigated. Hardness of both SK and SW gels containing agar increased with increasing level of agar. However, the addition of κ-carrageenan lowered hardness of mixed gels. Springiness and cohesiveness of either SK or SW gels decreased as the level of both agar or κ-carrageenan increased. Gelling and melting temperatures generally increased when the level of hydrocolloids was increased...
June 5, 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28576256/negative-pressure-wound-therapy-for-burns
#14
REVIEW
Neel A Kantak, Riyam Mistry, David E Varon, Eric G Halvorson
Negative pressure wound therapy (NPWT) has become a widely used treatment for acute and chronic wounds. NPWT is indicated for a variety of complex wounds, and some studies validate its use for certain aspects of burn care. Although further research is needed to explore the benefits for burns, NPWT has proven beneficial in its use as a dressing that bolsters skin grafts, promotes integration of bilaminate dermal substitutes, promotes re-epithelialization of skin graft donor sites, and potentially reduces the zone of stasis...
July 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28576252/skin-substitutes-and-bioscaffolds-temporary-and-permanent-coverage
#15
REVIEW
Anthony G Haddad, Giorgio Giatsidis, Dennis P Orgill, Eric G Halvorson
Advancements in surgical wound treatment have led to skin substitutes and bioscaffolds as temporary and permanent coverage for burn wounds. Skin substitutes are used to improve wound coverage and restore the functional and aesthetic qualities of skin, and help to prevent wound infection and maintain a moist wound healing environment. Although allografts are preferred when autografts are not possible, high costs and limited availability have led to the use of xenografts and the development of skin substitutes and bioscaffolds...
July 2017: Clinics in Plastic Surgery
https://www.readbyqxmd.com/read/28576050/extraction-and-characterization-of-collagen-from-antarctic-and-sub-antarctic-squid-and-its-potential-application-in-hybrid-scaffolds-for-tissue-engineering
#16
Rui C G Coelho, Ana L P Marques, Sara M Oliveira, Gabriela S Diogo, Rogério P Pirraco, Joana Moreira-Silva, José C Xavier, Rui L Reis, Tiago H Silva, João F Mano
Collagen is the most abundant protein found in mammals and it exhibits a low immunogenicity, high biocompatibility and biodegradability when compared with others natural polymers. For this reason, it has been explored for the development of biologically instructive biomaterials with applications for tissue substitution and regeneration. Marine origin collagen has been pursued as an alternative to the more common bovine and porcine origins. This study focused on squid (Teuthoidea: Cephalopoda), particularly the Antarctic squid Kondakovia longimana and the Sub-Antarctic squid Illex argentinus as potential collagen sources...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28576031/fabrication-of-a-three-dimensional-spongy-scaffold-using-human-wharton-s-jelly-derived-extra-cellular-matrix-for-wound-healing
#17
Bahareh Beiki, Bahman Zeynali, Ehsan Seyedjafari
The Wharton's jelly (WJ) contains significant amounts of extracellular matrix (ECM) components and rich source of endogenous growth factors. In this study, we designed a new biomimetic spongy scaffold from decellularized WJ-derived ECM and used it as a skin substitute. Histological analysis and biochemical assays showed that bio-active molecules preserved in the fabricated scaffolds and that the scaffolds have highly interconnected porous structure. Cytotoxicity and mechanical evaluation of the scaffold indicated that it is non-toxic and has appropriate mechanical properties...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28575970/in-situ-foamable-degradable-polyurethane-as-biomaterial-for-soft-tissue-repair
#18
Thorsten Laube, Jürgen Weisser, Stefan Berger, Stefan Börner, Sabine Bischoff, Harald Schubert, Mieczyslaw Gajda, Rolf Bräuer, Matthias Schnabelrauch
Degradable foams which can be inserted endoscopically as liquid or pasty mixtures into soft tissue defects possess a promising potential for the surgical treatment of such defects. The defects can be sealed under in situ foaming and simultaneous material expansion. We developed an in situ foamable (l-lactide-co-ε-caprolactone)-based, star-shaped prepolymer by ring opening polymerization of l-lactide and ε-caprolactone in the presence of meso-erythritol as starter. By conversion of the terminal hydroxyl groups of the formed oligoester with lysine diisocyanate ethyl ester (LDI) an isocyanate-endcapped, reactive prepolymer has been received...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28569046/training-improves-vibrotactile-spatial-acuity-and-intensity-discrimination-on-the-lower-back-using-coin-motors
#19
H Christiaan Stronks, Janine Walker, Daniel J Parker, Nick Barnes
Tactile vision substitution devices are assistive technologies for the blind that redirect visual information to the tactile sense. They typically include a tactile display that conveys visual information to the skin. Two important parameters that determine the maximum information bandwidth of tactile displays are the spatial acuity of the skin, and the ability of the user to discriminate between stimulus intensities. These two parameters were investigated by determining the two-point discrimination (TPD) threshold and the just-noticeable intensity difference (JND) using coin motors on the lower back...
June 1, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28561172/-delayed-post-burn-scar-reconstruction-of-the-dorsum-of-the-hand-with-a-collagen-elastin-based-dermal-substitute-and-split-skin-graft
#20
Patricia Beatrice Lebo, Martin Grohmann, Lars Kamolz
The hands are involved in more than 80% of severe (grade IIb-III) burn accidents. Even if appropriate initial surgical care is provided in a timely manner, this does not necessarily guarantee a satisfactory outcome in terms of function and aesthetics if interdisciplinary postoperative care and patient compliance are inadequate. In the following case, a grade IIb-III burn, this led to unstable scars on the back of both hands and an intrinsic-minus hand position, bilaterally. Our case study demonstrates that even a delayed reconstruction with a collagen- elastin-based dermal substitute and split-skin graft combined with appropriate interdisciplinary postoperative care may lead to an excellent result comparable with the function and aesthetics of healthy hands, albeit with a significant effort...
April 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
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