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https://www.readbyqxmd.com/read/27905610/dendritic-polyglycerol-and-n-isopropylacrylamide-based-thermoresponsive-nanogels-as-smart-carriers-for-controlled-delivery-of-drugs-through-the-hair-follicle
#1
Fitsum Feleke Sahle, Michael Giulbudagian, Julian Bergueiro, Jürgen Lademann, Marcelo Calderón
Nanoparticles with a size of several hundred nanometers can effectively penetrate into the hair follicles and may serve as depots for controlled drug delivery. However, they can neither overcome the hair follicle barrier to reach the viable cells nor release the loaded drug adequately. On the other hand, small drug molecules cannot penetrate deep into the hair follicles. Thus, the most efficient way for drug delivery through the follicular route is to employ nanoparticles that can release the drug close to the target structure upon exposure to some external or internal stimuli...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27904857/t-cadherin-expression-in-the-epidermis-and-adnexal-structures-of-normal-skin
#2
Stanislaw Buechner, Paul Erne, Therese J Resink
BACKGROUND: T-cadherin is an atypical glycosylphosphatidylinositol-anchored member of the cadherin superfamily of adhesion molecules. The role of T-cadherin in biology of the skin is poorly understood. Expression of T-cadherin in basal keratinocytes and dermal blood vessels of the healthy epidermis has been demonstrated, but studies on expression in skin appendages are rare. METHODS: We conducted an immunohistochemical analysis of T-cadherin expression in the epidermis and adnexal structures of normal skin...
September 2016: Dermatopathology (Basel, Switzerland)
https://www.readbyqxmd.com/read/27904182/comparative-study-of-efficacy-of-epidermal-melanocyte-transfer-versus-hair-follicular-melanocyte-transfer-in-stable-vitiligo
#3
Navya Donaparthi, Ajay Chopra
BACKGROUND: Vitiligo surgery has come up a long way from punch skin grafts to epidermal cell suspension and latest to the extracted hair follicle outer root sheath cell suspension (EHFORSCS) transplantation. The progressive development from one technique to the other is always on a quest for the best. In the latest development, EHFORSCS, which is an enriched source of follicular inactive melanocyte (melanocyte stem cells), seems to be a good addition to the prevailing cell-based therapies for vitiligo...
November 2016: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/27900998/novel-mutations-in-psenen-gene-in-two-chinese-acne-inversa-families-manifested-as-familial-multiple-comedones-and-dowling-degos-disease
#4
Cheng Zhou, Guang-Dong Wen, Lwin Myint Soe, Hong-Jun Xu, Juan Du, Jian-Zhong Zhang
BACKGROUND: Acne inversa (AI), also called hidradenitis suppurativa, is a chronic, inflammatory, recurrent skin disease of the hair follicle. Familial AI shows autosomal-dominant inheritance caused by mutations in the γ-secretase genes. This study was aimed to identify the specific mutations in the γ-secretase genes in two Chinese families with AI. METHODS: In this study, two Chinese families with AI were investigated. All the affected individuals in the two families mainly manifested with multiple comedones, pitted scars, and a few inflammatory nodules on their face, neck, trunk, axilla, buttocks, upper arms, and thighs...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27900536/t%C3%AE-4-overexpression-based-on-the-piggybac-transposon-system-in-cashmere-goats-alters-hair-fiber-characteristics
#5
Bingbo Shi, Qiang Ding, Xiaolin He, Haijing Zhu, Yiyuan Niu, Bei Cai, Jiao Cai, Anming Lei, Danju Kang, Hailong Yan, Baohua Ma, Xiaolong Wang, Lei Qu, Yulin Chen
Increasing cashmere yield is one of the vital aims of cashmere goats breeding. Compared to traditional breeding methods, transgenic technology is more efficient and the piggyBac (PB) transposon system has been widely applied to generate transgenic animals. For the present study, donor fibroblasts were stably transfected via a PB donor vector containing the coding sequence of cashmere goat thymosin beta-4 (Tβ4) and driven by a hair follicle-specific promoter, the keratin-associated protein 6.1 (KAP6.1) promoter...
November 29, 2016: Transgenic Research
https://www.readbyqxmd.com/read/27898952/frequency-of-leukochimerism-in-holstein-and-jersey-twinsets
#6
A S Young, B W Kirkpatrick
The current study was conducted to test breed difference in the frequency of leukochimerism. This study used leukochimerism as evidence of placental vascular anastomosis formation and compared its frequency in the Holstein and Jersey breeds. We test the null hypothesis that there is no difference in incidence of leukochimerism in the Holstein and Jersey breeds. Hair and blood samples were collected from 85 Jersey twinsets and 80 Holstein twinsets, ranging in age from 1 d to 8 yr. An additional 7 Holstein twinsets (6 complete and 1 partial where 1 twin died) were sampled originally 48 to 72 h after birth and resampled at 5 to 10 mo of age to provide an assessment of whether leukochimerism changed with age...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898044/dna-damage-inducible-transcript-4-is-an-innate-surveillant-of-hair-follicular-stress-in-vitamin-d-receptor-knockout-mice-and-a-regulator-of-wound-re-epithelialization
#7
Hengguang Zhao, Sandra Rieger, Koichiro Abe, Martin Hewison, Thomas S Lisse
Mice and human patients with impaired vitamin D receptor (VDR) signaling have normal developmental hair growth but display aberrant post-morphogenic hair cycle progression associated with alopecia. In addition, VDR(-/-) mice exhibit impaired cutaneous wound healing. We undertook experiments to determine whether the stress-inducible regulator of energy homeostasis, DNA damage-inducible transcript 4 (Ddit4), is involved in these processes. By analyzing hair cycle activation in vivo, we show that VDR(-/-) mice at day 14 exhibit increased Ddit4 expression within follicular stress compartments...
November 26, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27897150/effect-of-microscopic-modeling-of-skin-in-electrical-and-thermal-analysis-of-transcranial-direct-current-stimulation
#8
Jose Gomez-Tames, Yukiya Sugiyama, Ilkka Laakso, Satoshi Tanaka, Soichiro Koyama, Norihiro Sadato, Akimasa Hirata
Transcranial direct current stimulation (tDCS) is a neuromodulation scheme where a small current is delivered to the brain via two electrodes attached to the scalp. The electrode design is an important topic, not only as regards efficacy, but also from a safety perspective, as tDCS may be related to skin lesions that are sometimes observed after stimulation. Previous computational models of tDCS have omitted the effects of microscopic structures in the skin, and the different soak conditions of the electrodes, and model validation has been limited...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27896178/comparison-of-saccharina-japonica-undaria-pinnatifida-mixture-and-minoxidil-on-hair-growth-promoting-effect-in-mice
#9
Ki Soo Park, Dae Hwan Park
BACKGROUND: Algae have traditionally been used for promotion of hair growth. Use of hair regrowth drugs, such as minoxidil, is limited due to side effects. The aim of this study was to examine a mixture of Saccharina japonica and Undaria pinnatifida (L-U mixture) on hair growth and to compare the promoting effect of hair growth by a 3% minoxidil and a L-U mixture. METHODS: To evaluate the hair growth-promoting activity, saline, 50% ethanol, 3% minoxidil, and the L-U mixture were applied 2 times a day for a total of 14 days on the dorsal skin of C57BL/6 mice after depilation...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27892611/towards-a-bacterial-treatment-for-armpit-malodour
#10
Chris Callewaert, Jo Lambert, Tom Van de Wiele
Axillary malodour is a frustrating condition for many people. It can lead to significant discomforts and various psychological effects. The underarm microbiome generally plays a major role in axillary malodour formation. Not only the bacteria on the armpit epidermis, but especially those living in the sweat glands, sweat pores and hair follicles play a pivotal role in malodour development. In order to treat underarm malodour, this viewpoint paper envisions a bacterial treatment. Replacing the autochthonous malodour causing microbiome with a non-odour causing microbiome, through an armpit bacterial transplantation or direct application of probiotics/non-odour causing bacteria could resolve the condition...
November 28, 2016: Experimental Dermatology
https://www.readbyqxmd.com/read/27892605/emilin3-an-extracellular-matrix-molecule-with-restricted-distribution-in-skin
#11
Diana Corallo, Alvise Schiavinato, Dario Bizzotto, Martina Milanetto, Marija Guljelmovic, Douglas R Keene, Gerhard Sengle, Paola Braghetta, Paolo Bonaldo
EMILIN3 is an extracellular matrix glycoprotein that displays a dynamic and restricted expression pattern in connective tissues during post-natal life. In this study, we report the characterization of EMILIN3 deposition in the skin. In addition, to unravel the functions of this protein in skin homeostasis, we generated Emilin3 null mice and provide evidence that EMILIN3 is dispensable for hair follicle growth and maintenance throughout adult life. This article is protected by copyright. All rights reserved.
November 28, 2016: Experimental Dermatology
https://www.readbyqxmd.com/read/27890404/incomplete-urethral-duplication-associated-with-a-dermoid-cyst-in-a-dog-with-urinary-obstruction
#12
F Thierry, S Drew, J Del-Pozo, N Fernandez-Salesa, S Woods, G Stanzani, T Liuti
A 20-month-old male miniature dachshund was evaluated for a 10-week history of intermittent stranguria, pollakiuria, haematuria and obstructive urolithiasis. Retrograde urethrocystography revealed a subcutaneous saccular structure in the perineal area connected to the intrapelvic urethra associated with urolithiasis. After excision of the perineal saccular structure, microscopical examination confirmed the presence of transitional epithelium lining the diverticulum, with isolated submucosal smooth muscle bundles...
November 24, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/27889319/cell-type-specific-chromatin-states-differentially-prime-squamous-cell-carcinoma-tumor-initiating-cells-for-epithelial-to-mesenchymal-transition
#13
Mathilde Latil, Dany Nassar, Benjamin Beck, Soufiane Boumahdi, Li Wang, Audrey Brisebarre, Christine Dubois, Erwin Nkusi, Sandrine Lenglez, Agnieszka Checinska, Alizée Vercauteren Drubbel, Michael Devos, Wim Declercq, Rui Yi, Cédric Blanpain
Epithelial to mesenchymal transition (EMT) in cancer cells has been associated with metastasis, stemness, and resistance to therapy. Some tumors undergo EMT while others do not, which may reflect intrinsic properties of their cell of origin. However, this possibility is largely unexplored. By targeting the same oncogenic mutations to discrete skin compartments, we show that cell-type-specific chromatin and transcriptional states differentially prime tumors to EMT. Squamous cell carcinomas (SCCs) derived from interfollicular epidermis (IFE) are generally well differentiated, while hair follicle (HF) stem cell-derived SCCs frequently exhibit EMT, efficiently form secondary tumors, and possess increased metastatic potential...
November 16, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27889291/acantholytic-squamous-cell-carcinoma-is-usually-associated-with-hair-follicles-not-acantholytic-actinic-keratosis-and-is-not-high-risk-diagnosis-management-and-clinical-outcomes-in-a-series-of-115-cases
#14
Toru Ogawa, Maija Kiuru, Thomas H Konia, Maxwell A Fung
BACKGROUND: Acantholytic squamous cell carcinoma (aSCC) is regarded as a high-risk variant of cutaneous squamous cell carcinoma (SCC). Acantholytic actinic keratosis (aAK) has been regarded as a precursor risk factor for aSCC. However, supporting evidence is limited. OBJECTIVE: We sought to document clinical features, histologic features, management, and outcomes in a series of aSCC cases. METHODS: Definitions of aSCC, aAK, and aSCC arising in association with aAK were applied to a consecutive series of aSCC cases...
November 23, 2016: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/27882588/clinical-and-epidemiological-analysis-in-149-cases-of-rhododendrol-induced-leukoderma
#15
Momoko Yoshikawa, Yasuyuki Sumikawa, Tokimasa Hida, Takafumi Kamiya, Kimi Kase, Yasue Ishii-Osai, Junji Kato, Yuji Kan, Shiori Kamiya, Yuki Sato, Toshiharu Yamashita
Rhododendrol-induced leukoderma is an acquired depigmentation that develops mainly at the contact site after repeated use of skin-whitening cosmetics containing rhododendrol. In most cases, cessation of further depigmentation or occurrence of repigmentation is observed after discontinuing the use of cosmetics. However, some patients develop vitiligo vulgaris through the spread of depigmentation into the non-exposed areas. Our study aims to investigate the patient-specific factors that may affect the extent of depigmentation or repigmentation, as well as development of vitiligo vulgaris...
November 24, 2016: Journal of Dermatology
https://www.readbyqxmd.com/read/27880932/lgr6-stem-cells-and-their-progeny-in-mouse-epidermis-under-regimens-of-exogenous-skin-carcinogenesis-and-their-absence-in-ensuing-skin-tumors
#16
Gerline C van de Glind, Heggert G Rebel, Jacoba J Out-Luiting, Wim Zoutman, Cornelis P Tensen, Frank R de Gruijl
Lgr6+ cells have been identified as a novel class of proliferating (Ki67+) stem cells in mouse epidermis. We investigated their response to UV exposure in Lgr6-EGFP-Ires-CreERT2/R26R-LacZ haired and hairless mice and whether they become initiating cells of UV- or chemically induced skin tumors. UV overexposure erased Lgr6+ cells (EGFP+) from the interfollicular epidermis (IFE), but - as after wounding - they apparently repopulated the IFE from the hair follicles. Under sub-sunburn chronic UV exposure, Lgr6+ cells and their progeny (LacZ+ after pulse of tamoxifen) diminished strongly in the IFE...
November 17, 2016: Oncotarget
https://www.readbyqxmd.com/read/27880068/human-hair-follicle-associated-pluripotent-hhap-stem-cells-differentiate-to-cardiac-muscle-cells
#17
Natsuko Tohgi, Koya Obara, Masateru Yashiro, Yuko Hamada, Nobuko Arakawa, Sumiyuki Mii, Ryoichi Aki, Robert M Hoffman, Yasuyuki Amoh
We have previously demonstrated that the nestin-expressing hair follicle-associated-pluripotent (HAP) stem cells are located in the bulge area. HAP stem cells have been previously shown to differentiate to neurons, glial cells, keratinocytes, smooth-muscle cells, melanocytes and cardiac-muscle cells in vitro. Subsequently, we demonstrated that HAP stem cells could effect nerve and spinal cord regeneration in mouse models, differentiating to Schwann cells and neurons. In previous studies, we established an efficient protocol for the differentiation of cardiac-muscle cells from mouse HAP stem cells...
November 23, 2016: Cell Cycle
https://www.readbyqxmd.com/read/27875586/correction-disruption-of-fgf5-in-cashmere-goats-using-crispr-cas9-results-in-more-secondary-hair-follicles-and-longer-fibers
#18
Xiaolong Wang, Bei Cai, Jiankui Zhou, Haijing Zhu, Yiyuan Niu, Baohua Ma, Honghao Yu, Anmin Lei, Hailong Yan, Qiaoyan Shen, Lei Shi, Xiaoe Zhao, Jinlian Hua, Xingxu Huang, Lei Qu, Yulin Chen
[This corrects the article DOI: 10.1371/journal.pone.0164640.].
2016: PloS One
https://www.readbyqxmd.com/read/27867768/induced-pluripotent-stem-cells-from-human-hair-follicle-keratinocytes-as-a-potential-source-for-in-vitro-hair-follicle-cloning
#19
Sheng Jye Lim, Shu Cheow Ho, Pooi Ling Mok, Kian Lee Tan, Alan H K Ong, Seng Chiew Gan
BACKGROUND: Human hair follicles are important for the renewal of new hairs and their development. The generation of induced pluripotent stem cells (iPSCs) from hair follicles is easy due to its accessibility and availability. The pluripotent cells derived from hair follicles not only have a higher tendency to re-differentiate into hair follicles, but are also more suited for growth in hair scalp tissue microenvironment. METHODS: In this study, human hair follicular keratinocytes were used to generate iPSCs, which were then further differentiated in vitro into keratinocytes...
2016: PeerJ
https://www.readbyqxmd.com/read/27862634/expression-analysis-of-the-stem-cell-marker-pw1-peg3-reveals-a-cd34-negative-progenitor-population-in-the-hair-follicle
#20
Vanessa Besson, Sergiy Kyryachenko, Peggy Janich, Salvador A Benitah, Giovanna Marazzi, David Sassoon
Pw1/Peg3 is a parentally imprinted gene expressed in adult stem cells in every tissue thus far examined including the stem cells of the hair follicle. Using a Pw1/Peg3 reporter mouse, we carried out a detailed dissection of the stem cells in the bulge, which is a major stem cell compartment of the hair follicle in mammalian skin. We observed that PW1/Peg3 expression initiates upon placode formation during fetal development, coincident with the establishment of the bulge stem cells. In the adult, we observed that PW1/Peg3 expression is found in both CD34+ and CD34- populations of bulge stem cells...
November 15, 2016: Stem Cells
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