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https://www.readbyqxmd.com/read/27935061/autophagy-in-uv-damage-response
#1
Ashley Sample, Yu-Ying He
UV radiation exposure from sunlight and artificial tanning beds is the major risk factor for the development of skin cancer and skin photoaging. UV-induced skin damage can trigger a cascade of DNA damage response signaling pathways, including cell cycle arrest, DNA repair, and, if damage is irreparable, apoptosis. Compensatory proliferation replaces the apoptotic cells to maintain skin barrier integrity. Disruption of these processes can be exploited to promote carcinogenesis by allowing the survival and proliferation of damaged cells...
December 9, 2016: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/27935042/insight-in-dna-repair-of-uv-induced-pyrimidine-dimers-by-chromatographic-methods
#2
Thierry Douki, Anne von Koschembahr, Jean Cadet
UV-induced formation of pyrimidine dimers in DNA is a major deleterious event in both eukaryotic and prokaryotic cells. Accumulation of cyclobutane pyrimidine dimers and pyrimidine (6-4) pyrimidone photoproducts can lead to cell death or be at the origin of mutations. In skin, UV-induction of DNA damage is a major initiating event in tumorigenesis. To counteract these deleterious effects, all cell types possess DNA repair machinery, such as nucleotide excision repair and, in some cell types, direct reversion...
December 9, 2016: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/27933278/a-simple-method-for-closure-of-urethrocutaneous-fistula-after-tubularized-incised-plate-repair-preliminary-results
#3
Mehdi Shirazi, Ali Ariafar, Amir Hossein Babaei, Abdosamad Ashrafzadeh, Ali Adib
BACKGROUND: Urethrocutaneous fistula (UCF) is the most prevalent complication after hypospadias repair surgery. Many methods have been developed for UCF correction, and the best technique for UCF repair is determined based on the size, location, and number of fistulas, as well as the status of the surrounding skin. OBJECTIVES: In this study, we introduced and evaluated a simple method for UCF correction after tubularized incised plate (TIP) repair. METHODS: This clinical study was conducted on children with UCFs ≤ 4 mm that developed after TIP surgery for hypospadias repair...
November 2016: Nephro-urology Monthly
https://www.readbyqxmd.com/read/27928064/3d-printing-guiding-stent-graft-fenestration-a-novel-technique-for-fenestration-in-endovascular-aneurysm-repair
#4
Jianhua Huang, Gan Li, Wei Wang, Keming Wu, Tianming Le
OBJECTIVE: To describe a novel approach, 3D printing guiding stent graft fenestration, for fenestration during endovascular aneurysm repair for juxtarenal abdominal aortic aneurysm. METHODS: A 69-year-old male with juxtarenal abdominal aortic aneurysm underwent endovascular aneurysm repair with "off the label" fenestrated stent graft. To precisely locate the fenestration position, we reconstructed a 3D digital abdominal aortic aneurysm model and created a skin template covering this abdominal aortic aneurysm model...
December 6, 2016: Vascular
https://www.readbyqxmd.com/read/27925206/opposite-effects-of-mechanical-action-of-fluid-flow-on-proangiogenic-factor-secretion-from-human-adipose-derived-stem-cells-with-and-without-oxidative-stress
#5
Beatriz Bravo, Cira García de Durango, Álvaro González, Arancha R Gortázar, Xavier Santos, Jerónimo Forteza-Vila, Fernando Vidal-Vanaclocha
Mechanical forces, hypoxia and oxidative stress contribute to skin renewal, perfusion and wound healing, but how are they regulating subcutaneous adipose-derived stem cells (ASCs) in the inflammatory microenvironment associated to skin repair and disorders is unknown. In this study, ASCs were isolated from lipoaspirate samples from plastic surgery patients, primary cultured and their differentiation and secretion of a panel of cytokines with pronounced effects on skin repair and angiogenesis were studied under mechanical stimulation by intermittent fluid flow, 1% hypoxia and oxidative stress by glutathione (GSH) depletion with buthionine sulfoximine (BSO) treatment...
December 7, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27917213/efficacy-of-early-skin-to-skin-contact-on-the-rate-of-exclusive-breastfeeding-in-term-neonates-a-randomized-controlled-trial
#6
Amit Sharma
BACKGROUND: Despite multiple benefits of breast milk, the rates of exclusive breastfeeding in developing countries are low. OBJECTIVE: To evaluate the efficacy of early skin -to -skin contact (SSC) on the rate of exclusive breastfeeding (EBF) at 6 weeks of age among term neonates born by vaginal delivery. METHODS: Term neonates born by vaginal delivery and did not require any resuscitation were randomized at birth to SSC (n=100) and control (n=100) group...
September 2016: African Health Sciences
https://www.readbyqxmd.com/read/27916373/antibiotic-releasing-microspheres-prevent-mesh-infection-in%C3%A2-vivo
#7
Kevin T Grafmiller, Sean T Zuckerman, Clayton Petro, Lijia Liu, Horst A von Recum, Michael J Rosen, Julius N Korley
BACKGROUND: Infection remains a dreaded complication after implantation of surgical prosthetics, particularly after hernia repair with synthetic mesh. We previously demonstrated the ability of a newly developed polymer to provide controlled release of an antibiotic in a linear fashion over 45 d. We subsequently showed that coating mesh with the drug-releasing polymer prevented a Staphylococcus aureus (SA) infection in vivo. To broaden the applicability of this technology, the polymer was synthesized as isolated "microspheres" and loaded with vancomycin (VM) before conducting a noninferiority analysis...
November 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27916282/repair-of-complex-pharyngocutaneous-fistula-using-a-staged-temporoparietal-fascial-flap
#8
Nicholas B Abt, Priya Srikanth, Sidharth V Puram, Daniel G Deschler
INTRODUCTION: PCF is the most common major complication after salvage total laryngectomy (TL), especially for previously irradiated patients with laryngeal or hypopharyngeal cancer. METHODS/RESULTS: A 65-year-old woman presented with recurrent bilateral supraglottic SCC requiring salvage TL 5.5years after initial T1N0M0 epiglottic SCC resection. Her post-operative course was complicated by PCF development one month post-operatively and surgical fistula closure was delayed for adjuvant chemoradiotherapy...
November 25, 2016: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/27915402/an-easy-to-use-wound-dressing-gelatin-bioactive-nanoparticle-gel-and-its-preliminary-in-vivo-study
#9
Chen Wang, Feiyan Zhu, Yang Cui, Huihui Ren, Yue Xie, Ailing Li, Lijun Ji, Xiaozhong Qu, Dong Qiu, Zhenzhong Yang
Beyond promoting hard tissue repairing, bioactive glasses (BGs) have also been proved to be beneficial for wound healing. Nano-scale BGs prepared by sol-gel method were found to have a better performance as they have a larger specific surface area. In this work, bioactive nanoparticles (nBPs) with mean diameter of 12 nm (BP-12) instead of conventional BGs were mixed with gelatin to form an easy-to-use hydrogel as a dressing for skin wound. It was found that the composite of BP-12 and gelatin could form a hydrogel (BP-12/Gel) under 25 °C, which showed pronounced thixotropy at a practically accessible shear rate, therefore become easy to be used for wound cover...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27911032/a-dermal-equivalent-engineered-with-tgf-%C3%AE-3-expressing-bone-marrow-stromal-cells-and-amniotic-membrane-cosmetic-healing-of-full-thickness-skin-wounds-in-rats
#10
Ali Samadikuchaksaraei, Ahmad Mehdipour, Mehryar Habibi Roudkenar, Javad Verdi, Mohammad Taghi Joghataei, Kamran As'adi, Fatemeh Amiri, Mozhgan Dehghan Harati, Mazaher Gholipourmalekabadi, Nushin Karkuki Osguei
Transforming growth factor beta-3 (TGF-β3) has been shown to decrease scar formation after scheduled topical applications to the cutaneous wounds. This study aimed to continuously deliver TGF-β3, during the early phase of wound healing, by engineering a dermal equivalent (DE) using TGF-β3 expressing bone marrow stromal cells (BM-SCs) and human dehydrated amniotic membrane (hDAM). To engineer a DE, rat BM-SCs were seeded on the hDAM and TGF-β3 was transiently transfected into the BM-SCs using a plasmid vector...
December 2016: Artificial Organs
https://www.readbyqxmd.com/read/27908370/graft-use-in-bulbar-urethroplasty
#11
REVIEW
Mya E Levy, Sean P Elliott
The gold standard for bulbar urethroplasty has been excision and primary anastomosis. Application of this approach is generally limited to strictures that are 2 cm or less in the bulbar urethra due to penile shortening. Strictures greater than 2 cm are successfully treated with augmentation urethroplasty wherein the narrowed segment is not excised but widened with the use of a skin flap or a tissue graft. Buccal mucosa is the most prevalent tissue for bulbar urethral stricture repair for strictures greater than 2 cm...
February 2017: Urologic Clinics of North America
https://www.readbyqxmd.com/read/27908364/management-of-urethral-strictures-after-hypospadias-repair
#12
REVIEW
Warren T Snodgrass, Nicol C Bush
Strictures of the neourethra after hypospadias surgery are more common after skin flap repairs than urethral plate or neo-plate tubularizations. The diagnosis of stricture after hypospadias repair is suspected based on symptoms of stranguria, urinary retention, and/or urinary tract infection. It is confirmed by urethroscopy during anticipated repair, without preoperative urethrography. The most common repairs for neourethra stricture after hypospadias surgery are single-stage dorsal inlay graft and 2-stage labial mucosa replacement urethroplasty...
February 2017: Urologic Clinics of North America
https://www.readbyqxmd.com/read/27905298/haploinsufficiency-of-the-folliculin-gene-leads-to-impaired-functions-of-lung-fibroblasts-in-patients-with-birt-hogg-dub%C3%A3-syndrome
#13
Yoshito Hoshika, Fumiyuki Takahashi, Shinsaku Togo, Muneaki Hashimoto, Takeshi Nara, Toshiyuki Kobayashi, Fariz Nurwidya, Hideyuki Kataoka, Masatoshi Kurihara, Etsuko Kobayashi, Hiroki Ebana, Mika Kikkawa, Katsutoshi Ando, Koichi Nishino, Okio Hino, Kazuhisa Takahashi, Kuniaki Seyama
Birt-Hogg-Dubé syndrome (BHDS) is an autosomal dominant inherited disorder caused by germline mutations in the FLCN gene, and characterized by skin fibrofolliculomas, multiple lung cysts, spontaneous pneumothorax, and renal neoplasms. Pulmonary manifestations frequently develop earlier than other organ involvements, prompting a diagnosis of BHDS However, the mechanism of lung cyst formation and pathogenesis of pneumothorax have not yet been clarified. Fibroblasts were isolated from lung tissues obtained from patients with BHDS (n = 12) and lung cancer (n = 10) as controls...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27904274/pretreatment-of-ferulic-acid-protects-human-dermal-fibroblasts-against-ultraviolet-a-irradiation
#14
Hyung Jin Hahn, Ki Bbeum Kim, Seunghee Bae, Byung Gon Choi, Sungkwan An, Kyu Joong Ahn, Su Young Kim
BACKGROUND: Approximately 90%~99% of ultraviolet A (UVA) ray reaches the Earth's surface. The deeply penetrating UVA rays induce the formation of reactive oxygen species (ROS), which results in oxidative stress such as photoproducts, senescence, and cell death. Thus, UVA is considered a primary factor that promotes skin aging. OBJECTIVE: Researchers investigated whether pretreatment with ferulic acid protects human dermal fibroblasts (HDFs) against UVA-induced cell damages...
December 2016: Annals of Dermatology
https://www.readbyqxmd.com/read/27904185/topical-therapy-in-atopic-dermatitis-in-children
#15
Dharshini Sathishkumar, Celia Moss
Atopic dermatitis (AD) is a common, chronic childhood skin disorder caused by complex genetic, immunological, and environmental interactions. It significantly impairs quality of life for both child and family. Treatment is complex and must be tailored to the individual taking into account personal, social, and emotional factors, as well as disease severity. This review covers the management of AD in children with topical treatments, focusing on: education and empowerment of patients and caregivers, avoidance of trigger factors, repair and maintenance of the skin barrier by correct use of emollients, control of inflammation with topical corticosteroids and calcineurin inhibitors, minimizing infection, and the use of bandages and body suits...
November 2016: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/27903963/cdh1-regulates-e2f1-degradation-in-response-to-differentiation-signals-in-keratinocytes
#16
Randeep K Singh, Lina Dagnino
The E2F1 transcription factor plays key roles in skin homeostasis. In the epidermis, E2F1 expression is essential for normal proliferation of undifferentiated keratinocytes, regeneration after injury and DNA repair following UV radiation-induced photodamage. Abnormal E2F1 expression promotes nonmelanoma skin carcinoma. In addition, E2F1 must be downregulated for proper keratinocyte differentiation, but the relevant mechanisms involved remain poorly understood. We show that differentiation signals induce a series of post-translational modifications in E2F1 that are jointly required for its downregulation...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27903444/design-of-an-elastin-layered-dermal-regeneration-template
#17
Suzanne M Mithieux, Anthony S Weiss
: We demonstrate a novel approach for the production of tunable quantities of elastic fibers. We also show that exogenous tropoelastin is rate-limiting for elastin synthesis regardless of the age of the dermal fibroblast donor. Additionally, we provide a strategy to further enhance synthesis by older cells through the application of conditioned media. We show that this approach delivers an elastin layer on one side of the leading dermal repair template for contact with the deep dermis in order to deliver prefabricated elastic fibers to a physiologically appropriate site during subsequent surgery...
November 26, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27900223/modified-one-stage-dorsal-inlay-buccal-mucosa-graft-technique-for-ventral-penile-urethral-and-penile-skin-erosion-a-step-by-step-guide
#18
Lennert Van Putte, Gunter De Win
OBJECTIVE: To demonstrate the use of a modified single-stage technique for the repair of a ventral penile urethral erosion with involvement of the penile skin, as penile urethral erosion is a rare but potential complication of chronic indwelling catheterisation with a lack of available recommendations for reconstructive options. PATIENT AND METHODS: A 44-year-old male with paraplegia, neurogenic bladder dysfunction and chronic sacral decubitus, presented with a large mid-penile erosion of the ventral penile shaft and urethra, which was caused by chronic transurethral indwelling catheterisation while being hospitalised in an intensive care unit...
December 2016: Arab Journal of Urology
https://www.readbyqxmd.com/read/27900221/grafted-tubularised-incised-plate-urethroplasty-an-objective-assessment-of-outcome-with-lessons-learnt-from-surgical-experience-with-263-cases
#19
Vipul Gupta, Sunil Kumar Yadav, Talal Alanzi, Islam Amer, Mohmmad Salah, Mamdouh Ahmed
OBJECTIVE: Snodgrass urethroplasty remains the preferred technique in primary distal hypospadias but development of meatal stenosis often limits distal extension of the midline incision of the urethral plate (MIUP), which remains a limiting factor in reconstructing an apical neomeatus (NM). We here-in assess the cosmetic and functional outcome with distal extension of the MIUP in grafted tubularised incised-plate urethroplasty (G-TIP) repair. PATIENTS AND METHODS: This prospective study included the surgical experience of 263 cases of primary hypospadias operated upon between 2012 and 2015...
December 2016: Arab Journal of Urology
https://www.readbyqxmd.com/read/27900013/surgical-treatment-of-rare-giant-malignant-tumors-of-the-scalp-a-report-of-3-cases-with-different-tumor-types
#20
Xiaoliang Liu, Wenzhong Li, Hepei Yuan, Weihong Gu, Dawei Chen
The scalp is the most frequent site of occurrence of malignant tumors. As an area that is generally neglected by the patient and not closely monitored during physical examinations, scalp tumors can go unnoticed until they become malignant. The present study reports 3 cases of rare giant malignant tumors of the scalp, namely a peripheral nerve sheath tumor, a fibrous tumor and a malignant proliferating trichilemmal tumor, that were treated at The First Bethune Hospital of Jilin University (Changchun, China)...
November 2016: Oncology Letters
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