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https://www.readbyqxmd.com/read/28546083/mechanisms-of-tolerance-and-potential-therapeutic-interventions-in-alopecia-areata
#1
REVIEW
Gabriel Skogberg, Sonya Jackson, Annika Åstrand
This review aims to address the mechanisms of compromised immune tolerance contributing to the development and maintenance of Alopecia Areata (AA). Our goal is to also highlight future treatment opportunities and therapeutics that will safely and efficiently restore hair growth and maintain patients in remission. AA is a presumptive autoimmune disorder that coincides and genetically clusters to several other autoimmune diseases. In this review, we pay attention to the learnings from the mechanistic research and drug development in these other autoimmune conditions...
May 22, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28523261/rejuvenation-using-platelet-rich-plasma-and-lipofilling-for-vaginal-atrophy-and-lichen-sclerosus
#2
Seok Hwan Kim, Eun Soo Park, Tae Hee Kim
Vaginal atrophy is a common condition among peri- and post-menopausal women. Symptoms of vaginal dryness, pruritus, irritation, loss of subcutaneous fat, sparse pubic hair and dyspareunia occur due to decreased estrogen level. Estrogen-based treatments are effective. But many patients are reluctant to be treated due to health concerns. As alternatives, we explored the efficacy of platelet-rich plasma (PRP) and lipofilling. A 67-year-old female patient with vaginal atrophy was referred to our department. Treatment using estrogen cream had failed to improve patient's symptoms...
April 2017: Journal of Menopausal Medicine
https://www.readbyqxmd.com/read/28499525/consecutive-cyproterone-acetate-and-estradiol-treatment-in-late-pubertal-transgender-female-adolescents
#3
Lloyd J W Tack, Robin Heyse, Margarita Craen, Karlien Dhondt, Heidi Vanden Bossche, Jolien Laridaen, Martine Cools
BACKGROUND: Cyproterone acetate (CA) is an antiandrogenic progestin commonly used in adult transwomen to suppress endogenous androgens, often in combination with estrogens to induce feminization. AIM: To assess the (side) effects and biochemical changes of CA alone and in combination with estrogens in adolescent trans-girls. METHODS: This study was a retrospective analysis of clinical and biochemical data from 27 trans-girls who presented at Tanner stage G4 and were treated with CA monotherapy for at least 6 months (mean = 12 months) and then in combination with incremental doses of estrogens (CA + E; mean = 16 months)...
May 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28499298/-cochlear-implant-state-of-the-art
#4
Thomas Lenarz
Cochlear implants are the treatment of choice for the auditory rehabilitation of patients with sensory deafness. They restore the missing function of inner hair cells by transforming the acoustic signal into electrical stimuli for activation of auditory nerve fibers. Due to the very fast technology development cochlear implants provide open-set speech understanding in the majority of patients including the use of the telephone. Children can achieve a near to normal speech and language development provided their deafness is detected early after onset and implantation is performed quickly thereafter...
April 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28461770/pimecrolimus-increases-the-melanogenesis-and-migration-of-melanocytes-in-vitro
#5
Ping Xu, Jie Chen, Cheng Tan, Ren-Sheng Lai, Zhong-Sheng Min
Vitiligo is an intriguing depigmentary disorder and is notoriously difficult to be treated. The ultimate goal of vitiligo treatment is to replenish the lost melanocytes by immigration from hair follicle and to restore the normal function of melanogenesis by residual melanocytes. There are two types of topical calcineurin inhibitors called tacrolimus and pimecrolimus, and are recommended as the first-line treatments in vitiligo. Although pimecrolimus is efficacious for the repigmentation of vitiligo, its intrinsic mechanisms have never been investigated in vitro...
May 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28437267/reconstruction-of-pediatric-scalp-avulsion-injuries-after-dog-bites
#6
Zhi Yang Ng, Kyle R Eberlin, Tianyu Lin, Peter T Masiakos, Curtis L Cetrulo
Dog bite injuries are common and the head and neck is most frequently involved in pediatric patients. In severe cases, the combination of crushing, tearing, and puncturing can result in scalp avulsion. Currently, microsurgical replantation of the avulsed scalp remains the gold standard but may not always be possible. The authors present their treatment algorithm with 2 patient examples. In Patient 1, the scalp was deemed unsuitable for replantation due to extensive soft tissue injury; in Patient 2, the scalp was not available on presentation...
April 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28418596/hair-follicle-dermal-stem-cells-and-skin-derived-precursor-cells-exciting-tools-for-endogenous-and-exogenous-therapies
#7
Natacha A Agabalyan, Nicole L Rosin, Waleed Rahmani, Jeff Biernaskie
Understanding the cellular interactions and molecular signals underlying hair follicle (HF) regeneration may have significant implications for restorative therapies for skin disease that diminish hair growth, whilst also serving to provide fundamental insight into the mechanisms underlying adult tissue regeneration. One of the major, yet underappreciated, players in this process is the underlying HF mesenchyme. Here, we provide an overview of a mesenchymal progenitor pool referred to as hair follicle dermal stem cells (hfDSCs), discuss their potential functions within the skin, their relationship to Skin-derived precursors (SKPs) and consider unanswered questions about the function of these specialized fibroblasts...
April 18, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28388662/scanning-laser-optical-tomography-for-in-toto-imaging-of-the-murine-cochlea
#8
Lena Nolte, Nadine Tinne, Jennifer Schulze, Dag Heinemann, Georgios C Antonopoulos, Heiko Meyer, Hans Gerd Nothwang, Thomas Lenarz, Alexander Heisterkamp, Athanasia Warnecke, Tammo Ripken
The mammalian cochlea is a complex macroscopic structure due to its helical shape and the microscopic arrangements of the individual layers of cells. To improve the outcomes of hearing restoration in deaf patients, it is important to understand the anatomic structure and composition of the cochlea ex vivo. Hitherto, only one histological technique based on confocal laser scanning microscopy and optical clearing has been developed for in toto optical imaging of the murine cochlea. However, with a growing size of the specimen, e...
2017: PloS One
https://www.readbyqxmd.com/read/28387239/survival-of-human-embryonic-stem-cells-implanted-in-the-guinea-pig-auditory-epithelium
#9
Min Young Lee, Sandra Hackelberg, Kari L Green, Kelly G Lunghamer, Takaomi Kurioka, Benjamin R Loomis, Donald L Swiderski, R Keith Duncan, Yehoash Raphael
Hair cells in the mature cochlea cannot spontaneously regenerate. One potential approach for restoring hair cells is stem cell therapy. However, when cells are transplanted into scala media (SM) of the cochlea, they promptly die due to the high potassium concentration. We previously described a method for conditioning the SM to make it more hospitable to implanted cells and showed that HeLa cells could survive for up to a week using this method. Here, we evaluated the survival of human embryonic stem cells (hESC) constitutively expressing GFP (H9 Cre-LoxP) in deaf guinea pig cochleae that were pre-conditioned to reduce potassium levels...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28381734/implant-supported-oral-rehabilitation-in-child-with-ectodermal-dysplasia-4-year-follow-up
#10
Thaisa Cezária Triches, Marcos Ximenes, João Gustavo Oliveira de Souza, Armando Rodrigues Lopes Pereira Neto, Antônio Carlos Cardoso, Michele Bolan
Ectodermal dysplasia (ED) is an anomaly determined by genetic factors that alter ectodermal structures such as skin, hair, nails, glands, and teeth. Children affected by this condition require extensive, comprehensive, and multidisciplinary treatment. An 8-year-old female patient visited the Dentistry Clinic of the Federal University of Santa Catarina with the chief complaint of multiple missing teeth. The mother reported that the patient had ED. Clinical and radiographic examination revealed the congenital absence of several primary and permanent teeth and tooth germs...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28375579/seed-vectored-endophytic-bacteria-modulate-development-of-rice-seedlings
#11
S K Verma, K Kingsley, I Irizarry, M Bergen, R N Kharwar, J F White
AIM: The aim of the present study was to evaluate the effects of the removal of indigenous bacteria from rice seeds on seedling growth and development. Here we report the presence of three indigenous endophytic bacteria in rice seeds that play important roles in modulating seedling development (shoot and root lengths, and formation of root hairs and secondary roots) and defence against pathogens. METHODS AND RESULTS: Seed-associated bacteria were removed using surface sterilization with NaOCl (bleach) followed by antibiotic treatment...
April 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28358137/identification-and-evolution-of-a-plant-cell-wall-specific-glycoprotein-glycosyl-transferase-exad
#12
Svenning Rune Møller, Xueying Yi, Silvia Melina Velásquez, Sascha Gille, Pernille Louise Munke Hansen, Christian P Poulsen, Carl Erik Olsen, Martin Rejzek, Harriet Parsons, Yang Zhang, Hans H Wandall, Henrik Clausen, Robert A Field, Markus Pauly, Jose M Estevez, Jesper Harholt, Peter Ulvskov, Bent Larsen Petersen
Extensins are plant cell wall glycoproteins that act as scaffolds for the deposition of the main wall carbohydrate polymers, which are interlocked into the supramolecular wall structure through intra- and inter-molecular iso-di-tyrosine crosslinks within the extensin backbone. In the conserved canonical extensin repeat, Ser-Hyp4, serine and the consecutive C4-hydroxyprolines (Hyps) are substituted with an α-galactose and 1-5 β- or α-linked arabinofuranoses (Arafs), respectively. These modifications are required for correct extended structure and function of the extensin network...
March 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28350869/in-vitro-skin-models-to-study-epithelial-regeneration-from-the-hair-follicle
#13
Nkemcho Ojeh, Baki Akgül, Marjana Tomic-Canic, Mike Philpott, Harshad Navsaria
The development of dermal equivalents (DEs) for the treatment of burns has contributed toward efficient wound closure. A collagen-glycosaminoglycan DE (C-GAG) grafted with hair follicles converted a full-thickness wound to partial-thickness resulting in complete wound closure and restored hair. In this study we compared the ability of both intact pilosebaceous units (PSU) or truncated hair follicles (THF) to regenerate a multilayered epidermis in vitro when implanted into de-epidermalized dermis (DED) or C-GAG with the epidermis generated in vivo using C-CAG...
2017: PloS One
https://www.readbyqxmd.com/read/28341954/reversible-alopecia-with-localized-scalp-necrosis-after-accidental-embolization-of-the-parietal-artery-with-hyaluronic-acid
#14
Qing Yang, Lihong Qiu, Chenggang Yi, Ping Xue, Zhou Yu, Xianjie Ma, Yingjun Su, Shuzhong Guo
Hyaluronic acid (HA) filler injection is widely used for soft-tissue augmentation. Complications associated with HA filling are not uncommon; however, HA-induced alopecia is a rarely reported complication that could result in severe secondary psychological trauma. The etiology, clinical traits, treatment strategies, outcomes, and possible reversibility of HA-induced alopecia have not been characterized. Here, we report a case in which bilateral temple injections of 6.5 mL of HA led to persistent pain over the left scalp for several days...
March 24, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28296142/platelet-rich-plasma-for-androgenetic-alopecia-does-it-work-evidence-from-meta-analysis
#15
REVIEW
Salvatore Giordano, Marco Romeo, Petteri Lankinen
INTRODUCTION: The use of platelet-rich plasma (PRP) has increased among different surgical specialities for the treatment of various conditions. Androgenetic alopecia is a common condition, with severe attendant psychosocial implications. PRP injections for hair restoration have become a popular practice among plastic surgeons. We performed a meta-analysis comparing local injection of platelet-rich plasma versus control to evaluate this issue in order to investigate the effectiveness of PRP local injections for androgenetic alopecia...
March 13, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28290603/fenofibrate-exerts-protective-effects-against-gentamicin-induced-toxicity-in-cochlear-hair-cells-by-activating-antioxidant-enzymes
#16
Channy Park, Hye-Min Ji, Se-Jin Kim, Sung-Hee Kil, Joon No Lee, Seongae Kwak, Seong-Kyu Choe, Raekil Park
Fenofibrate, an activator of peroxisome proliferator-activated receptors (PPARs), has been shown to protect the kidneys and brain cells from oxidative stress; however, its role in preventing hearing loss has not been reported to date, at least to the best of our knowledge. In this study, we demonstrated the protective effects of fenofibrate against gentamicin (GM)-induced ototoxicity. We found that the auditory brainstem response threshold which was increased by GM was significantly reduced by pre-treatment with fenofibrate in rats...
April 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28263708/supporting-cells-remove-and-replace-sensory-receptor-hair-cells-in-a-balance-organ-of-adult-mice
#17
Stephanie A Bucks, Brandon C Cox, Brittany A Vlosich, James P Manning, Tot B Nguyen, Jennifer S Stone
Vestibular hair cells in the inner ear encode head movements and mediate the sense of balance. These cells undergo cell death and replacement (turnover) throughout life in non-mammalian vertebrates. However, there is no definitive evidence that this process occurs in mammals. We used fate-mapping and other methods to demonstrate that utricular type II vestibular hair cells undergo turnover in adult mice under normal conditions. We found that supporting cells phagocytose both type I and II hair cells. Plp1-CreER(T2)-expressing supporting cells replace type II hair cells...
March 6, 2017: ELife
https://www.readbyqxmd.com/read/28254438/gene-therapy-restores-balance-and-auditory-functions-in-a-mouse-model-of-usher-syndrome
#18
Kevin Isgrig, Jack W Shteamer, Inna A Belyantseva, Meghan C Drummond, Tracy S Fitzgerald, Sarath Vijayakumar, Sherri M Jones, Andrew J Griffith, Thomas B Friedman, Lisa L Cunningham, Wade W Chien
Dizziness and hearing loss are among the most common disabilities. Many forms of hereditary balance and hearing disorders are caused by abnormal development of stereocilia, mechanosensory organelles on the apical surface of hair cells in the inner ear. The deaf whirler mouse, a model of human Usher syndrome (manifested by hearing loss, dizziness, and blindness), has a recessive mutation in the whirlin gene, which renders hair cell stereocilia short and dysfunctional. In this study, wild-type whirlin cDNA was delivered to the inner ears of neonatal whirler mice using adeno-associated virus serotype 2/8 (AAV8-whirlin) by injection into the posterior semicircular canal...
March 1, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28245737/hearing-disorders-in-cats
#19
George M Strain
Practical relevance: Auditory function is a sense that is central to life for cats - being important in situational awareness of potential predators, pursuit of prey, and for communication with conspecifics, humans and other species. Deafness in cats is most frequently the result of a genetic disorder, strongly associated with white fur and blue eyes, but may also result from acquired causes such as advancing age, ototoxic drugs, infection, environmental noise and physical trauma. Deafness can be sensorineural, where there is loss of cochlear hair cells, or conductive, where sound is muffled on its way to the inner ear...
March 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28221183/the-effect-of-plasma-rich-in-growth-factors-on-pattern-hair-loss-a-pilot-study
#20
Eduardo Anitua, Ander Pino, Nahikari Martinez, Gorka Orive, Daniel Berridi
BACKGROUND: Autologous growth factors have proved to promote tissue regeneration in various medical fields. Recent findings suggest that platelet rich plasma may also play an important role in hair follicle restoration. OBJECTIVE: The objective of this study was to evaluate the safety and clinical efficacy of plasma rich in growth factors (PRGFs) for the treatment of androgenetic alopecia (AGA). MATERIALS AND METHODS: Five PRGF injections were administered over 19 patients with AGA...
May 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
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