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https://www.readbyqxmd.com/read/29056331/alkaline-ceramidase-1-protects-mice-from-premature-hair-loss-by-maintaining-the-homeostasis-of-hair-follicle-stem-cells
#1
Chih-Li Lin, Ruijuan Xu, Jae Kyo Yi, Fang Li, Jiang Chen, Evan C Jones, Jordan B Slutsky, Liqun Huang, Basil Rigas, Jian Cao, Xiaoming Zhong, Ashley J Snider, Lina M Obeid, Yusuf A Hannun, Cungui Mao
Ceramides and their metabolites are important for the homeostasis of the epidermis, but much remains unknown about the roles of specific pathways of ceramide metabolism in skin biology. With a mouse model deficient in the alkaline ceramidase (Acer1) gene, we demonstrate that ACER1 plays a key role in the homeostasis of the epidermis and its appendages by controlling the metabolism of ceramides. Loss of Acer1 elevated the levels of various ceramides and sphingoid bases in the skin and caused progressive hair loss in mice...
October 13, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/29055950/ovarian-stem-cell-nests-in-reproduction-and-ovarian-aging
#2
Haifeng Ye, Tuochen Zheng, Wei Li, Xiaoyan Li, Xinxin Fu, Yaoqi Huang, Chuan Hu, Jia Li, Jian Huang, Zhengyv Liu, Liping Zheng, Yuehui Zheng
The fixed primordial follicles pool theory, which monopolized reproductive medicine for more than one hundred years, has been broken by the discovery, successful isolation and establishment of ovarian stem cells. It has brought more hope than ever of increasing the size of primordial follicle pool, improving ovarian function and delaying ovarian consenescence. Traditional view holds that stem cell aging contributes to the senility of body and organs. However, in the process of ovarian aging, the main factor leading to the decline of the reproductive function is the aging and degradation of ovarian stem cell nests, rather than the senescence of ovarian germ cells themselves...
October 20, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29055862/juvenile-exposure-to-bisphenol-a-promotes-ovarian-differentiation-but-suppresses-its-growth-potential-involvement-of-pituitary-follicle-stimulating-hormone
#3
Weiting Chen, Shuk-Wa Lau, Yuqin Fan, Rudolf S S Wu, Wei Ge
Bisphenol A (BPA), a plastic monomer and plasticizer, is commonly used in plastics industry, and it has been well documented to be an estrogenic endocrine disrupter. In the present study, we investigated the effect of early (juvenile) exposure to BPA on the hypothalamic-pituitary-gonad (HPG) axis in the zebrafish. Estradiol (E2) and testosterone (T) were also included as positive and negative controls respectively. Juvenile zebrafish were exposed to BPA (1 and 10μM), E2 (10nM) and T (10nM) from 20 to 40 dpf (days post-fertilization), the period of sex/gonadal differentiation, followed by histological and expression analyses at 40 dpf...
October 14, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29055783/prenatal-organochlorine-pesticide-exposure-and-the-disruption-of-steroids-and-reproductive-hormones-in-cord-blood-the-hokkaido-study
#4
Atsuko Araki, Chihiro Miyashita, Takahiko Mitsui, Houman Goudarzi, Futoshi Mizutani, Youichi Chisaki, Sachiko Itoh, Seiko Sasaki, Kazutoshi Cho, Kimihiko Moriya, Nobuo Shinohara, Katsuya Nonomura, Reiko Kishi
Certain organochlorine pesticides (OCPs) are designated as persistent organic pollutants and are regulated in many countries. The effects of OCPs on pediatric endocrinology are a concern; however, only limited data exist from human studies on maternal OCP exposure and its effects on infants' hormone levels. This study was conducted as part of the Hokkaido Study Sapporo Cohort, a prospective birth cohort study in Japan. Participants included 514 women who enrolled at 23-35weeks of gestation between 2002 and 2005; maternal blood samples were collected in late pregnancy, and 29 OCPs were measured...
October 18, 2017: Environment International
https://www.readbyqxmd.com/read/29055410/getting-to-the-core-of-the-dermal%C3%A2-papilla
#5
Mingxing Lei, Li Yang, Cheng-Ming Chuong
Through coordinated and reciprocal interactions between the epithelium and mesenchyme, diverse integumentary organs form and undergo cyclic renewal. The hair follicle has become the main model to understand this extraordinary regenerative behavior. At the core is the dermal papilla, the organizing center, and the epithelial stem cells that respond to dermal papilla signaling. Two recent papers by Telerman et al. and Yang et al. unravel new molecular landscapes within the dermal papilla.
November 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29055061/preservation-of-stem-cells-in-androgenetic-alopecia
#6
Hend Gamil, Magda Assaf, Manal Elsayed, Khaled Gharib, Mohamed Soliman, Naglaa A Mostafa
Androgenetic alopecia is characterized by progressive, patterned hair loss from the scalp that occurs in both men and women. Suggested that genetically predisposed hair follicles are target for androgen-stimulated follicle miniaturization, with gradual replacement of terminal hairs by vellus hairs. We aimed at evaluating the expression of stem and progenitor cell markers using IHC in scalp biopsies from affected and unaffected areas of patients with AGA. This article is protected by copyright. All rights reserved...
October 21, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29054756/a-lncrna-h19-transcript-from-secondary-hair-follicle-of-liaoning-cashmere-goat-identification-regulatory-network-and-expression-regulated-potentially-by-its-promoter-methylation
#7
Yu B Zhu, Ze Y Wang, Rong H Yin, Qian Jiao, Su J Zhao, Yu Y Cong, Hui L Xue, Dan Guo, Shi Q Wang, Yan X Zhu, Wen L Bai
The H19 transcript (imprinted maternally expressed transcript) is well-known as long noncoding RNA (lncRNA), and it is thought to be associated with the inductive capacity of dermal papilla cells for hair-follicle reconstruction. In this study, we isolated and characterized a lncRNA-H19 transcript from the secondary hair follicle of Liaoning cashmere goat. Also, we investigated its transcriptional pattern and methylation status of H19 gene in secondary hair follicle of this breed during different stages of hair follicle cycle...
October 17, 2017: Gene
https://www.readbyqxmd.com/read/29054607/repigmentation-of-human-vitiligo-skin-by-nbuvb-is-controlled-by-transcription-of-gli1-and-activation-of-%C3%AE-catenin-pathway-in-the-hair-follicle-bulge-stem-cells
#8
Nathaniel B Goldstein, Maranke I Koster, Kenneth L Jones, Bifeng Gao, Laura G Hoaglin, Steven E Robinson, Michael J Wright, Smaranda I Birlea, Abigail Luman, Karoline A Lambert, Yiqun G Shellman, Mayumi Fujita, William A Robinson, Dennis R Roop, David A Norris, Stanca A Birlea
Vitiligo repigmentation is a complex process in which the melanocyte-depleted interfollicular epidermis (IE) is repopulated by melanocyte precursors from hair follicle (HF) bulge that proliferate, migrate, and differentiate into mature melanocytes on their way to the epidermis. The strongest stimulus for vitiligo repigmentation is narrow band UVB (NBUVB), but how the HF melanocyte precursors are activated by UV light has not been extensively studied. To better understand this process, we developed an application that combined laser capture microdissection and subsequent whole transcriptome RNA sequencing of HF bulge melanocyte precursors, and compared their gene signature to that of regenerated mature epidermal melanocytes from the NBUVB-treated vitiligo skin...
October 17, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29054585/-influence-of-epigenetic-in-sj%C3%A3-gren-s-syndrome
#9
A Bordron, A Charras, C Le Dantec, Y Renaudineau
Sjögren's syndrome (SS) is a systemic autoimmune epithelitis with a major female incidence, and characterized by a dry syndrome, impaired quality of life, visceral involvement, and lymphoma for the most aggressive cases. During this process, epithelial cells acquire the capacity to produce cytokines, chemokines, and autoantigens which can in turn be presented to the immune system. Consequently, this epithelitis is accompanied by lymphocytic infiltrations leading to the formation of pseudo-follicles in which self-reactive B lymphocytes are present...
October 17, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/29053993/orexin-system-in-swine-ovarian-follicles
#10
R Ciccimarra, S Bussolati, F Grasselli, S Grolli, L Ragionieri, F Ravanetti, M Botti, F Gazza, A Cacchioli, R Di Lecce, A M Cantoni, G Basini
Successful reproduction is strictly linked to metabolic cues. The orexins are a family of hypothalamic neurohormones, well known for their key role in the control of food intake and the involvement in several aspects of the reproductive process. The biological actions of both orexins are carried out through binding to the related Orexin 1 (OX1R) and Orexin 2 (OX2R) G-protein-coupled receptors. The purpose of this study was to investigate the presence of orexin system components in the porcine ovaries, to contribute to expand the knowledge about their pleiotropic role...
September 22, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/29053876/blood-hematological-and-biochemical-constituents-antioxidant-enzymes-immunity-and-lymphoid-organs-of-broiler-chicks-supplemented-with-propolis-bee-pollen-and-mannan-oligosaccharides-continuously-or-intermittently
#11
Y A Attia, H Al-Khalaifah, M S Ibrahim, A E Abd Al-Hamid, M A Al-Harthi, A El-Naggar
This study investigate the effect of bee pollen (BP) and/or propolis (Pro) as an alternative to Mannan oligosaccharides (Bio-MOS, a hydrolyzed yeast with natural and artificial flavors Alltech Inc) when given continuously or intermittently on antioxidant enzymes, immunity, weight and morphology of lymphoid organs of broilers. Thus, 324 unsexed one-day-old Arbor Acres broilers were randomly distributed into nine treatment groups, each replicated 6 times of 6 birds per replicate. The chicks were kept in wire cages and fed the same basal diet and were submitted to the following treatments: control without supplementation (control) or supplemented with BP at 300 mg, Pro at 300 mg, BP+Pro at 300 mg each and Bio-MOS at 0...
October 10, 2017: Poultry Science
https://www.readbyqxmd.com/read/29053813/comparative-transcriptomic-analysis-of-high-and-low-egg-producing-duck-ovaries
#12
Z Tao, W Song, C Zhu, W Xu, H Liu, S Zhang, Li Huifang
The egg-laying rate is an important indicator of egg production of laying ducks. Egg production directly impacts the economic benefits of the duck industry. In order to obtain better insight into the molecular mechanisms associated with the process of egg production, comparative transcriptomic analysis of the ovaries of Jinding ducks with high and low egg production was performed using the Illumina HiSeq 2500 system. A total of 843 differentially expressed genes (DEGs) was identified, 367 that were down-regulated and 476 that were up-regulated in high egg production (HEP) ovaries, as compared with low egg production (LEP) ovaries...
October 5, 2017: Poultry Science
https://www.readbyqxmd.com/read/29053754/coming-of-age-do-female-harbour-porpoises-phocoena-phocoena-from-the-north-sea-and-baltic-sea-have-sufficient-time-to-reproduce-in-a-human-influenced-environment
#13
Tina Kesselring, Sacha Viquerat, Ralph Brehm, Ursula Siebert
The harbour porpoise is the only cetacean species native to German waters. Since human pressures are suggested to shorten their reproductive lifespan, basic knowledge on reproduction is strongly required. One parameter is the onset of sexual maturity in female harbour porpoises. Therefore, we investigated the first signs of sexual maturity for a period of almost two decades (1990-2016). Ovaries from 111 female harbour porpoises from the German North Sea and Baltic Sea were examined for the presence and morphological structure of follicles, corpora lutea and corpora albicantia...
2017: PloS One
https://www.readbyqxmd.com/read/29053654/retrospective-analysis-of-jaw-biopsies-in-young-adults-a-study-of-1599-cases-in-southern-brazil
#14
K Silva, A Alves, M Correa, A Etges, A-C Vasconcelos, A-P Gomes, S Tarquinio
BACKGROUND: To evaluate the prevalence and the characteristics of jaw lesions diagnosed in young adults aged 20 to 30 years in a southern Brazil reference center, over a period of 25 years. And to analyze the concordance between clinical and histological diagnosis. MATERIAL AND METHODS: In this cross-sectional retrospective study, the biopsies files from this center were retrieved and data regarding sex, age, bone localization, clinical and histological diagnosis were collected...
October 20, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29052320/altrenogest-treatment-before-weaning-improves-litter-size-in-sows
#15
T P Lopes, A Bolarín, E A Martínez, J Roca
The study aimed to assess whether altrenogest treatment, fed before weaning (from -8 to -2 days), could improve fertility of sows showing reproductive seasonality. Ninety sows (50 in winter-spring [WS] and 40 in summer-autumn [SA]) were randomly selected and assigned to control (C; 27 in WS and 20 in SA) or altrenogest treatment (A; 23 in WS and 20 in SA) groups. The diameter and number of ovarian follicles were transrectally scanned at the onset of oestrus. Oestrus was evaluated twice daily from weaning to day 8 post-weaning...
October 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29052319/from-pre-ovulatory-follicle-palpation-to-the-challenge-of-twin-pregnancies-clinical-reflections-following-one-million-gynaecological-examinations-in-dairy-cows
#16
REVIEW
F López-Gatius, R H F Hunter
Based on experimental studies and extensive field-scale experience, this review offers new proposals for: (i) elevating the success of modern insemination procedures, (ii) emphasizing features of a pre-ovulatory follicle in the context of optimum insemination timing, (iii) overcoming heat stress and its consequences using physiological processes or endocrine protocols, (iv) establishing a viable pregnancy or early pregnancy loss and (v) the challenge of twin pregnancies. In conclusion, the fertility of high-yielding dairy cows can be further improved...
October 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29051746/commentary-efficacy-of-follicle-stimulating-hormone-fsh-alone-fsh%C3%A2-%C3%A2-luteinizing-hormone-human-menopausal-gonadotropin-or-fsh%C3%A2-%C3%A2-human-chorionic-gonadotropin-on-assisted-reproductive-technology-outcomes-in-the-personalized-medicine-era-a-meta-analysis
#17
COMMENT
https://www.readbyqxmd.com/read/29051716/assessment-of-the-effects-of-graded-doses-of-polyphenolic-rich-fraction-of-garcinia-kola-seeds-on-pituitary-testicular-axis-of-male-wistar-rats
#18
Mosunmola Busayo Omotola, Isaac O Adeosun, Efere M Obuotor, Rufus O Akomolafe, Olugbenga A Ayannuga
This study evaluated the ameliorative and prophylactic effects of 2 different doses of polyphenolic-rich fraction of Garcinia kola (PPRFGk) seeds on the histology and hormones of pituitary-testicular axis of male Wistar rats. Thirty-five male Wistar rats (150-200 g) were divided into 7 groups of 5 rats each. Groups I and II were given distilled water (0.5 mL/day) for 8 days followed by propylene glycol (0.2 mL/d) and 600 mg/kg of PPRFGk, respectively, for 21 days. Group III received sodium arsenate (8 days), left untreated for 21 days...
October 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/29051074/pairing-ultrasonography-with-endocrinology-to-elucidate-underlying-mechanisms-of-successful-pregnancy-in-the-northern-fur-seal-callorhinus-ursinus
#19
Michelle R Shero, Don R Bergfelt, J Ward Testa, Gregg P Adams
Reproductive success is one of the central tenets of conservation management programs, yet the inability to study underlying physiological processes in a minimally-invasive manner and the unpredictable nature of wild animal populations leaves large gaps in our knowledge of factors critical to successful reproduction in wild species. This study integrated ultrasonography of the reproductive tract and analysis of reproductive hormones in 172 northern fur seals (Callorhinus ursinus) to identify intrinsic factors associated with reinitiating embryonic growth at the end of diapause...
October 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29051056/recovery-of-serum-testosterone-levels-and-sexual-function-in-patients-treated-with-short-term-luteinizing-hormone-releasing-hormone-antagonist-as-a-neoadjuvant-therapy-before-external-radiotherapy-for-intermediate-risk-prostate-cancer-preliminary-prospective
#20
Takahiro Inoue, Takashi Mizowaki, Daijiro Kabata, Ayumi Shintani, Naoki Terada, Toshinari Yamasaki, Hiromitsu Negoro, Takashi Kobayashi, Kiyonao Nakamura, Haruo Inokuchi, Osamu Ogawa
INTRODUCTION: External beam radiation therapy (EBRT) with short-term androgen deprivation therapy is the standard of care for intermediate-risk prostate cancer patients. However, no study to date has evaluated the hormonal kinetics or sexual and hormonal function recovery after cessation of short-term luteinizing hormone (LH)-releasing hormone (LHRH) antagonist treatment. PATIENTS AND METHODS: Ten intermediate-risk prostate cancer patients (mean age, 69.9 years) were included...
September 23, 2017: Clinical Genitourinary Cancer
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