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https://www.readbyqxmd.com/read/28099203/evaluation-of-gene-expression-patterns-in-micrografts-demonstrate-induction-of-catagen-like-processes-during-storage
#1
Walter Krugluger, Karl Stiefsohn, Karl Moser, Claudia Moser, Katarina Laciak
BACKGROUND: Alterations of gene expression patterns may contribute to the commonly observed transient reduction of hair shaft elongation in hair restoration surgery. OBJECTIVE: To elucidate the molecular causes, we evaluated changes in gene expression patterns in hair follicle micrografts during storage. MATERIALS AND METHODS: Micrografts with different amounts of adjacent connective tissue (regular, skinny, and chubby) were stored for different periods, and the expression of key genes was determined: dermal papilla (DP): FGF7, alkaline phosphatase (ALP), versican; outer root sheath: Krt15; inner root sheath: Krt 25; cuticula: Krt85; Henle layer: filaggrin; genes related to apoptosis and growth/differentiation: Caspase 3, Ovol1, and Foxo1...
January 17, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28095555/megasessions-for-robotic-hair-restoration
#2
Joa O Carlos Pereira, Joa O Carlos Pereira Filho, Joa O Pedro Cabrera Pereira
A robotic system can select and remove individual hair follicles from the donor area with great precision and without fatigue. This report describes the use of the robotic system in a megasession for hair restoration. Patients were instructed to cut their hair to 1.0 to 1.2 mm before surgery. The robot selected and removed 600 to 800 grafts per hour so the follicular units (FU)s could be transplanted manually to recipient sites. The robot arm consists of a sharp inner punch and a blunt outer punch which together separate FUs from the sur- rounding tissue...
November 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28087829/tracheophytes-contain-conserved-orthologs-of-a-basic-helix-loop-helix-transcription-factor-to-modulate-root-hair-specific-genes
#3
Youra Hwang, Hee-Seung Choi, Hyun-Min Cho, Hyung-Taeg Cho
ROOT HAIR SPECIFIC (RHS) genes, which contain the root hair-specific cis-element (RHE) in their regulatory regions, function in root hair morphogenesis. Here, we demostrate that an Arabidopsis thaliana basic helix-loop-helix transcription factor, ROOT HAIR DEFECTVE SIX-LIKE 4 (RSL4), directly binds to the RHE in vitro and in vivo, up-regulates RHS genes, and stimulates root hair formation in Arabidopsis. Orthologs of RSL4 from a eudicot (poplar, Populus trichocarpa), a monocot (rice, Oryza sativa), and a lycophyte (Selaginella moellendorffii) each restored root hair growth in the Arabidopsis rsl4 mutant...
January 13, 2017: Plant Cell
https://www.readbyqxmd.com/read/28074124/involvement-of-blood-mononuclear-cells-in-the-infertility-age-associated-diseases-and-cancer-treatment
#4
REVIEW
Antonin Bukovsky
Blood mononuclear cells consist of T cells and monocyte derived cells. Beside immunity, the blood mononuclear cells belong to the complex tissue control system (TCS), where they exhibit morphostatic function by stimulating proliferation of tissue stem cells followed by cellular differentiation, that is stopped after attaining the proper functional stage, which differs among various tissue types. Therefore, the term immune and morphostatic system (IMS) should be implied. The TCS-mediated morphostasis also consists of vascular pericytes controlled by autonomic innervation, which is regulating the quantity of distinct tissues in vivo...
December 26, 2016: World Journal of Stem Cells
https://www.readbyqxmd.com/read/28034617/cochlear-hair-cell-regeneration-after-noise-induced-hearing-loss-does-regeneration-follow-development
#5
REVIEW
Fei Zheng, Jian Zuo
Noise-induced hearing loss (NIHL) affects a large number of military personnel and civilians. Regenerating inner-ear cochlear hair cells (HCs) is a promising strategy to restore hearing after NIHL. In this review, we first summarize recent transcriptome profile analysis of zebrafish lateral lines and chick utricles where spontaneous HC regeneration occurs after HC damage. We then discuss recent studies in other mammalian regenerative systems such as pancreas, heart and central nervous system. Both spontaneous and forced HC regeneration occurs in mammalian cochleae in vivo involving proliferation and direct lineage conversion...
December 26, 2016: Hearing Research
https://www.readbyqxmd.com/read/28029476/a-murine-model-of-orthotopic-periorbital-subunit-transplantation
#6
Bowen Gao, Bin Li, Xinxin Li, Jinhong Bae, Kaiyan Xiao, Qingfeng Li, Hainan Zhu
BACKGROUND: Conventional reconstructive methods fail to achieve satisfactory results in total eyelid defect cases. Vascularized composite tissue allotransplantation might provide both good appearance and function for these patients. We developed an orthotopic periorbital transplantation model in rats to facilitate further experimentation in this field. METHODS: In anatomical studies, the vascular distribution to and innervation of the periorbital unit were identified and recorded...
October 28, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/27932380/absence-of-vitamin-d-receptor-vdr-mediated-ppar%C3%AE-suppression-causes-alopecia-in-vdr-null-mice
#7
Vaibhav Saini, Hengguang Zhao, Elizabeth T Petit, Francesca Gori, Marie B Demay
Vitamin D receptor (VDR) mutations in humans and mice cause alopecia. VDR-null mice (VDR(-/-)) exhibit lack of postmorphogenic hair cycles as a result of impaired keratinocyte stem cell (KSC) function. To identify the molecular basis for abnormal KSC function, RNA sequencing of wild-type (WT) and VDR(-/-) KSCs was performed. These studies demonstrated that >80% of differentially expressed genes are up-regulated in VDR(-/-) KSCs; thus, the VDR is a transcriptional suppressor in WT KSCs. Peroxisome proliferator-activated receptor γ (PPARγ), PPARγ coactivator 1β (PGC1β), and lipoprotein lipase (LPL) were among the up-regulated genes identified...
December 8, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27918883/platelet-rich-plasma-in-androgenic-alopecia-indications-technique-and-potential-benefits
#8
REVIEW
Elie M Ferneini, Daniel Beauvais, Concetta Castiglione, Moniek V Ferneini
PURPOSE: The purpose of this study was to provide an overview of platelet-rich plasma (PRP) injected into the scalp for the management of androgenic alopecia. MATERIALS AND METHODS: A literature review was performed to evaluate the benefits of PRP in androgenic alopecia. RESULTS: Hair restoration has been increasing. PRP's main components of platelet-derived growth factor, transforming growth factor, and vascular endothelial growth factor have the potential to stimulate hard and soft tissue wound healing...
November 15, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27908934/gata6-promotes-hair-follicle-progenitor-cell-renewal-by-genome-maintenance-during-proliferation
#9
Alex B Wang, Ying V Zhang, Tudorita Tumbar
Cell proliferation is essential to rapid tissue growth and repair, but can result in replication-associated genome damage. Here, we implicate the transcription factor Gata6 in adult mouse hair follicle regeneration where it controls the renewal of rapidly proliferating epithelial (matrix) progenitors and hence the extent of production of terminally differentiated lineages. We find that Gata6 protects against DNA damage associated with proliferation, thus preventing cell cycle arrest and apoptosis. Furthermore, we show that in vivo Gata6 stimulates EDA-receptor signaling adaptor Edaradd level and NF-κB pathway activation, known to be important for DNA damage repair and stress response in general and for hair follicle growth in particular...
January 4, 2017: EMBO Journal
https://www.readbyqxmd.com/read/27880005/s-nitrosoglutathione-promotes-cell-wall-remodelling-alters-the-transcriptional-profile-and-induces-root-hair-formation-in-the-hairless-root-hair-defective-6-rhd6-mutant-of-arabidopsis-thaliana
#10
Camila Fernandes Moro, Marilia Gaspar, Felipe Rodrigues da Silva, Sivakumar Pattathil, Michael G Hahn, Ione Salgado, Marcia Regina Braga
Nitric oxide (NO) exerts pleiotropic effects on plant development; however, its involvement in cell wall modification during root hair formation (RHF) has not yet been addressed. Here, mutants of Arabidopsis thaliana with altered root hair phenotypes were used to assess the involvement of S-nitrosoglutathione (GSNO), the primary NO source, in cell wall dynamics and gene expression in roots induced to form hairs. GSNO and auxin restored the root hair phenotype of the hairless root hair defective 6 (rhd6) mutant...
November 23, 2016: New Phytologist
https://www.readbyqxmd.com/read/27869308/signaling-in-the-auditory-system-implications-in-hair-cell-regeneration-and-hearing-function
#11
REVIEW
Rahul Mittal, Luca H Debs, Desiree Nguyen, Amit P Patel, M'hamed Grati, Jeenu Mittal, Denise Yan, Adrien A Eshraghi, Xue Zhong Liu
Ear is a sensitive organ involved in hearing and balance function. The complex signaling network in the auditory system plays a crucial role in maintaining normal physiological function of the ear. The inner ear is comprised of a variety of host signaling pathways working in synergy to deliver clear sensory messages. Any disruption, as minor as it can be, has the potential to affect this finely tuned system with temporary or permanent sequelae including vestibular deficits and hearing loss. Mutations linked to auditory symptoms, whether inherited or acquired, are being actively researched for ways to reverse, silence, or suppress them...
November 21, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27864084/development-and-regeneration-of-vestibular-hair-cells-in-mammals
#12
REVIEW
Joseph C Burns, Jennifer S Stone
Vestibular sensation is essential for gaze stabilization, balance, and perception of gravity. The vestibular receptors in mammals, Type I and Type II hair cells, are located in five small organs in the inner ear. Damage to hair cells and their innervating neurons can cause crippling symptoms such as vertigo, visual field oscillation, and imbalance. In adult rodents, some Type II hair cells are regenerated and become re-innervated after damage, presenting opportunities for restoring vestibular function after hair cell damage...
November 15, 2016: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/27843925/the-role-of-hair-restoration-surgery-in-primary-cicatricial-alopecia
#13
REVIEW
Maurice J Dahdah, Matilde Iorizzo
Primary scarring alopecias are a group of inflammatory conditions in which the main target of the inflammation is the hair follicle. They represent up to 7.3% of the hair loss cases presenting to specialty hair clinics. They are poorly understood, their pathogeneses are mostly unknown and their management is guided at best by the results of small case series and expert opinions. These alopecias are frequently referred to as a trichologic emergency as their progression can be rapid and the hair loss they induce is permanent...
September 2016: Skin Appendage Disorders
https://www.readbyqxmd.com/read/27835849/nitric-oxide-signaling-is-involved-in-the-response-to-iron-deficiency-in-the-woody-plant-malus-xiaojinensis
#14
Longmei Zhai, Dashuang Xiao, Chaohua Sun, Ting Wu, Zhenhai Han, Xinzhong Zhang, Xuefeng Xu, Yi Wang
To cope with iron (Fe) deficiency, plants have evolved a wide range of adaptive responses from changes in morphology to altered physiological responses. Recent studies have demonstrated that nitric oxide (NO) is involved in the Fe-deficiency response through hormonal signaling pathways. Here, we report that NO plays a significant role in Malus xiaojinensis, an Fe-efficient woody plant. Fe deficiency triggered significant accumulation of NO in the root system, predominantly in the outer cortical and epidermal cells of the elongation zone...
December 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27830323/study-of-frontal-hairline-patterns-for-natural-design-and-restoration
#15
Suzan Sirinturk, Hassan Bagheri, Figen Govsa, Yelda Pinar, Mehmet Asim Ozer
OBJECTIVE: Hair loss is one of the most noticeable esthetic problems of the mankind. Hair transplantation has been a highly effective technique in reducing wide foreheads and recontouring the hairline. Creating a natural hairline is one of the most important elements of a successful hair transplant. This study aims at the requirements which are essential in designing hairline morphometrics and natural frontline. METHODS: Standard photographs of the forehead region were obtained from two hundred young Turkish adults participated in this study...
November 10, 2016: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/27805613/spiral-ganglion-neuron-explant-culture-and-electrophysiology-on-multi-electrode-arrays
#16
Stefan Hahnewald, Marta Roccio, Anne Tscherter, Jürg Streit, Ranjeeta Ambett, Pascal Senn
Spiral ganglion neurons (SGNs) participate in the physiological process of hearing by relaying signals from sensory hair cells to the cochlear nucleus in the brain stem. Loss of hair cells is a major cause of sensory hearing loss. Prosthetic devices such as cochlear implants function by bypassing lost hair cells and directly stimulating SGNs electrically, allowing for restoration of hearing in deaf patients. The performance of these devices depends on the functionality of SGNs, the implantation procedure and on the distance between the electrodes and the auditory neurons...
October 19, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27799284/multiple-phytohormones-promote-root-hair-elongation-by-regulating-a-similar-set-of-genes-in-the-root-epidermis-in-arabidopsis
#17
Shan Zhang, Linli Huang, An Yan, Yihua Liu, Bohan Liu, Chunyan Yu, Aidong Zhang, John Schiefelbein, Yinbo Gan
Multiple phytohormones, including auxin, ethylene, and cytokinin, play vital roles in regulating cell development in the root epidermis. However, their interactions in specific root hair cell developmental stages are largely unexplored. To bridge this gap, we employed genetic and pharmacological approaches as well as transcriptional analysis in order to dissect their distinct and overlapping roles in root hair initiation and elongation in Arabidopsis thaliana Our results show that among auxin, ethylene, and cytokinin, only ethylene induces ectopic root hair cells in wild-type plants, implying a special role of ethylene in the hair initiation stage...
December 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27785535/-conversion-of-sound-into-auditory-nerve-action-potentials
#18
J Encke, J Kreh, F Völk, W Hemmert
Outer hair cells play a major role in the hearing process: they amplify the motion of the basilar membrane up to a 1000-fold and at the same time sharpen the excitation patterns. These patterns are converted by inner hair cells into action potentials of the auditory nerve. Outer hair cells are delicate structures and easily damaged, e. g., by overexposure to noise. Hearing aids can amplify the amplitude of the excitation patterns, but they cannot restore their degraded frequency selectivity. Noise overexposure also leads to delayed degeneration of auditory nerve fibers, particularly those with low a spontaneous rate, which are important for the coding of sound in noise...
November 2016: HNO
https://www.readbyqxmd.com/read/27702995/a-rhamnose-deficient-lipopolysaccharide-mutant-of-rhizobium-sp-irbg74-is-defective-in-root-colonization-and-beneficial-interactions-with-its-flooding-tolerant-hosts-sesbania-cannabina-and-wetland-rice
#19
Shubhajit Mitra, Arijit Mukherjee, Audrey Wiley-Kalil, Seema Das, Heather Owen, Pallavolu M Reddy, Jean-Michel Ané, Euan K James, Prasad Gyaneshwar
Rhizobium sp. IRBG74 develops a classical nitrogen-fixing symbiosis with the aquatic legume Sesbania cannabina (Retz.). It also promotes the growth of wetland rice (Oryza sativa L.), but little is known about the rhizobial determinants important for these interactions. In this study, we analyzed the colonization of S. cannabina and rice using a strain of Rhizobium sp. IRBG74 dually marked with β-glucuronidase and the green fluorescent protein. This bacterium colonized S. cannabina by crack entry and through root hair infection under flooded and non-flooded conditions, respectively...
October 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27679642/vacuolar-iron-transporter-bnmeb2-is-involved-in-enhancing-iron-tolerance-of-brassica-napus
#20
Wei Zhu, Rong Zuo, Rongfang Zhou, Junyan Huang, Minqiang Tang, Xiaohui Cheng, Yueying Liu, Chaobo Tong, Yang Xiang, Caihua Dong, Shengyi Liu
Iron toxicity is a nutrient disorder that severely affects crop development and yield in some soil conditions. Vacuolar detoxification of metal stress is an important strategy for plants to survive and adapt to this adverse environment. Vacuolar iron transporter (VIT) members are involved in this process and play essential roles in iron storage and transport. In this study, we identified a rapeseed VIT gene BnMEB2 (BnaC07g30170D) homologs to Arabidopsis MEB2 (At5g24290). Transient expression analysis revealed that BnMEB2 was localized to the vacuolar membrane...
2016: Frontiers in Plant Science
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