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https://www.readbyqxmd.com/read/28329569/linear-trichoepithelioma-on-the-neck-of-a-15-year-old-girl
#1
Amanda J Laska, Roberto A Belli, Todd T Kobayashi
Trichoepitheliomas are trichogenic tumors that can have various clinical morphologies. These tumors are benign and differentiate toward the outer root sheath of the hair follicle. Solitary trichoepitheliomas arise sporadically, in contrast to multiple trichoepitheliomas, which are usually inherited as an autosomal dominant trait or as part of various genetic syndromes. We report a case of an adolescent female with a linear array of trichoepitheliomas on her left neck.
November 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28325356/primary-cutaneous-spindle-cell-b-cell-lymphoma-a-report-of-three-cases-and-review-of-the-literature
#2
Cynthia M Magro, Shabnam Momtahen
Primary cutaneous spindle cell lymphoma is a rare variant of primary cutaneous B-cell lymphoma (PCBCL). Herein, we present 3 cases of primary cutaneous spindle cell B cell lymphoma, 2 males and one female (age range 66-76years). The patients presented with solitary skin lesions, distributed in the head and neck area and chest. The dominant cell size was in the intermediate to large cell size range. While the main cell type was a spindled one, other cells with a nuclear morphology quite typical for a centroblast were noted and as well careful inspection in the three cases revealed a focal residuum of germinal center-like structures...
April 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28321529/the-cumulative-dose-of-gonadotropins-used-for-controlled-ovarian-stimulation-does-not-influence-the-odds-of-embryonic-aneuploidy-in-patients-with-normal-ovarian-response
#3
Lucky Sekhon, Kathryn Shaia, Anthony Santistevan, Karen Hunter Cohn, Joseph A Lee, Piraye Yurttas Beim, Alan B Copperman
OBJECTIVE: Controlled ovarian hyperstimulation (COH) promotes multifollicular growth, increasing the chance of obtaining euploid embryos that will successfully implant. Whether aneuploidy is increased from COH with exogenous gonadotropins interfering with natural selection of dominant follicles is a concern. This study evaluates the association between gonadotropin exposure and aneuploidy. METHODS: This is a retrospective cohort study of 828 patients that underwent 1122 IVF cycles involving controlled ovarian stimulation and trophectoderm biopsy for preimplantation genetic screening (PGS), from 2010 to 2015...
March 20, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28316977/microrna-mediating-networks-in-granulosa-cells-associated-with-ovarian-follicular-development
#4
Baoyun Zhang, Long Chen, Guangde Feng, Wei Xiang, Ke Zhang, Mingxing Chu, Pingqing Wang
Ovaries, which provide a place for follicular development and oocyte maturation, are important organs in female mammals. Follicular development is complicated physiological progress mediated by various regulatory factors including microRNAs (miRNAs). To demonstrate the role of miRNAs in follicular development, this study analyzed the expression patterns of miRNAs in granulosa cells through investigating three previous datasets generated by Illumina miRNA deep sequencing. Furthermore, via bioinformatic analyses, we dissected the associated functional networks of the observed significant miRNAs, in terms of interacting with signal pathways and transcription factors...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28287404/mutations-in-%C3%AE-secretase-subunit-encoding-psenen-underlie-dowling-degos-disease-associated-with-acne-inversa
#5
Damian J Ralser, F Buket Ü Basmanav, Aylar Tafazzoli, Jade Wititsuwannakul, Sarah Delker, Sumita Danda, Holger Thiele, Sabrina Wolf, Michélle Busch, Susanne A Pulimood, Janine Altmüller, Peter Nürnberg, Didier Lacombe, Uwe Hillen, Jörg Wenzel, Jorge Frank, Benjamin Odermatt, Regina C Betz
Dowling-Degos disease (DDD) is an autosomal-dominant disorder of skin pigmentation associated with mutations in keratin 5 (KRT5), protein O-fucosyltransferase 1 (POFUT1), or protein O-glucosyltransferase 1 (POGLUT1). Here, we have identified 6 heterozygous truncating mutations in PSENEN, encoding presenilin enhancer protein 2, in 6 unrelated patients and families with DDD in whom mutations in KRT5, POFUT1, and POGLUT1 have been excluded. Further examination revealed that the histopathologic feature of follicular hyperkeratosis distinguished these 6 patients from previously studied individuals with DDD...
March 13, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28282771/the-follicle-stimulating-hormone-receptor-asn680ser-polymorphism-is-associated-with-preterm-birth-in-hispanic-women
#6
Pablo Dominguez-Lopez, Laura Diaz-Cueto, Miguel Arechavaleta-Velasco, Felipe Caldiño-Soto, Alfredo Ulloa-Aguirre, Fabian Arechavaleta-Velasco
OBJECTIVE: Recently, a study based on the analysis of accelerated evolution of related genes at birth identified the follicle-stimulating hormone receptor (FSHR) as a possible candidate for the development of preterm delivery. Additionally, FSHR expression has been described in extragonadal tissue including the placenta. Therefore, the aim of the present study was to determine the association between the N680S polymorphism of the follicle-stimulating hormone receptor and preterm birth in a population of Hispanic women...
February 28, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28277543/estrogen-receptors-in-granulosa-cells-govern-meiotic-resumption-of-pre-ovulatory-oocytes-in-mammals
#7
Wei Liu, Qiliang Xin, Xiao Wang, Sheng Wang, Huarong Wang, Wenqiang Zhang, Ye Yang, Yanhao Zhang, Zhiyuan Zhang, Chao Wang, Yang Xu, Enkui Duan, Guoliang Xia
In mammals, oocytes are arrested at the diplotene stage of meiosis I until the pre-ovulatory luteinizing hormone (LH) surge triggers meiotic resumption through the signals in follicular granulosa cells. In this study, we show that the estradiol (E2)-estrogen receptors (ERs) system in follicular granulosa cells has a dominant role in controlling oocyte meiotic resumption in mammals. We found that the expression of ERs was controlled by gonadotropins under physiological conditions. E2-ERs system was functional in maintaining oocyte meiotic arrest by regulating the expression of natriuretic peptide C and natriuretic peptide receptor 2 (NPPC/NPR2), which was achieved through binding to the promoter regions of Nppc and Npr2 genes directly...
March 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28276192/the-pregnancy-outcome-of-progesterone-primed-ovarian-stimulation-using-medroxyprogesterone-acetate4mg-versus-10mg-daily-in-infertile-women-undergoing-in-vitro-fertilization-a-randomized-controlled-trial
#8
J Dong, Y Wang, W R Chai, Q Q Hong, N L Wang, L H Sun, H Long, L Wang, H Tian, Q F Lyu, X F Lu, Q J Chen, Y P Kuang
OBJECTIVE: To investigate the clinical outcome and endocrinological characteristics of progestin-primed ovarian stimulation (PPOS) using medroxyprogesterone acetate (MPA) 4mg versus 10mg daily in infertile women with normal ovary reserve. DESIGN: A randomized parallel controlled trial. SETTING: Tertiary-care academic medical center. PARTICIPANTS: 300 infertile women undergoing IVF/ICSI treatment. METHODS: HMG 225IU/d and MPA (group A: 10mg/d; group B: 4mg/d) were started simultaneously from cycle day 3 onwards...
March 9, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28274610/retinoic-acid-signaling-is-dispensable-for-somatic-development-and-function-in-the-mammalian-ovary
#9
Anna Minkina, Robin E Lindeman, Micah D Gearhart, Anne-Amandine Chassot, Marie-Christine Chaboissier, Norbert B Ghyselinck, Vivian J Bardwell, David Zarkower
Retinoic acid (RA) is a potent inducer of cell differentiation and plays an essential role in sex-specific germ cell development in the mammalian gonad. RA is essential for male gametogenesis and hence fertility. However, RA can also disrupt sexual cell fate in somatic cells of the testis, promoting transdifferentiation of male Sertoli cells to female granulosa-like cells when the male sexual regulator Dmrt1 is absent. The feminizing ability of RA in the Dmrt1 mutant somatic testis suggests that RA might normally play a role in somatic cell differentiation or cell fate maintenance in the ovary...
March 6, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28266227/kisspeptin-a-new-marker-for-human-pre-ovulation
#10
Junyu Zhai, Lingling Ding, Shigang Zhao, Weiping Li, Yinhua Sun, Shizhen Su, Jiangtao Zhang, Han Zhao, Zi-Jiang Chen
Kisspeptin is a polypeptide that plays an important role in reproductive endocrine regulation. The aim of present study was to investigate the dynamic trend of kisspeptin levels during the menstrual cycle and to elucidate the relationship between kisspeptin ovulation. First, 15 female volunteers with regular menstrual cycles were recruited to detect the change in serum and urine kisspeptin levels over one menstrual cycle within each individual. Subsequently, 114 serum samples and 79 urine samples from 114 individuals were randomly collected at the outpatient department to better ascertain the results...
March 7, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28254490/lh-signaling-induced-ptgs2a-expression-is-required-for-ovulation-in-zebrafish
#11
Haipei Tang, Yun Liu, Jianzhen Li, Gaofei Li, Yu Chen, Yike Yin, Yin Guo, Christopher H K Cheng, Xiaochun Liu, Haoran Lin
It is well known that ovulation is induced by luteinizing hormone (LH) surge. However, the down-stream factors that mediating LH surge induced ovulation are less clear. The cyclooxygenases (also known as PTGS) as key enzymes for prostaglandins synthesis appear to be important for ovulation in mammals, but their functional roles and molecular mechanism in regulation of fish ovulation are largely unexplored. In this study, we have systematically investigated the expression, regulation and functional roles of cox genes during zebrafish ovulation...
February 27, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28245188/amh-levels-in-girls-with-various-pubertal-problems
#12
Senay Savas-Erdeve, Elif Sagsak, Meliksah Keskin, Semra Cetinkaya, Zehra Aycan
BACKGROUND: Anti-Müllerian hormone (AMH) is produced by granulosa cells surrounding follicles that have undergone recruitment from the primordial follicle pool but have not been selected for dominance (preantral and early antral follicles). In healthy girls, serum levels of AMH vary considerably between individuals. We aimed to evaluate the AMH level in girls with premature thelarche (PT) and central precocious puberty (CPP). METHODS: Girls with CPP (n=21), PT (n=24) and a control prepubertal group (n=22) were included in the study...
March 1, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28181120/comparison-of-three-superovulation-protocols-with-or-without-gnrh-treatment-at-the-time-of-artificial-insemination-on-ovarian-response-and-embryo-quality-in-thai-native-heifers
#13
Vibuntita Chankitisakul, Jakkhaphan Pitchayapipatkul, Phirawit Chuawongboon, Dumrongrak Rakwongrit, Denpong Sakhong, Wuttigrai Boonkum, Thevin Vongpralub
To optimize the superovulation protocol in Thai native cattle, the present research was designed to (1) compare three different protocols designed to induce superstimulation and (2) study the effect of gonadotropin-releasing hormone (GnRH) administration at insemination time (to induce ovulation) on ovarian follicular activities in terms of the number of large follicles, corpora lutea (CLs) and unovulated follicles, and the number and quality of ova/embryos recovered in Thai native heifers. Initially, the estrous cycles of animals (n = 36) at unknown stages were synchronized by two prostaglandin F2α (PGF2α) injections at an interval of 12 days...
March 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28163019/interrelationships-between-ovarian-follicles-grown-in-culture-and-possible-mediators
#14
Alexander V Sirotkin, Iveta Florkovičová Koničková, Hans-Jorg Schaeffer, Jozef Laurincik, Abdel Halim Harrath
Dominance or cooperation between ovarian follicles can determine the number of ovulations and fecundity, but interrelationships between follicles in mono- and poly-ovulatory species and their mechanisms are poorly understood. The goals of this work were to determine the existence and compare the character of mutual influence of cultured ovarian follicles from a mono-ovulatory species (cow) with established follicular dominance with those from a poly-ovulatory species (pig), in which interrelationship between follicles remain unknown, and to examine the role of ovarian cell proliferation, the insulin-like growth factor I (IGF-I)- oxytocin (OT) system, and steroid hormones in mediating interrelationships among ovarian follicles...
February 2, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28113119/systemic-and-intrafollicular-components-of-follicle-selection-in-mares
#15
REVIEW
O J Ginther
Mares are superb models for study of follicle selection owing to similarities between mares and women in relative follicle diameters at specific events during the follicular wave and follicle accessibility for experimental sampling and manipulation. Usually, only 1 major follicular wave with a dominant follicle (DF) greater than 30 mm develops during the 22 to 24 d of the equine estrous cycle and is termed the primary or ovulatory wave. A major secondary wave occasionally (25%) develops early in the cycle...
December 22, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28107851/effect-of-vitamin-d-supplementation-on-polycystic-ovary-syndrome-a%C3%A2-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#16
REVIEW
Fang Fang, Ke Ni, Yiting Cai, Jin Shang, Xiaoke Zhang, Chengliang Xiong
OBJECTIVE: To evaluate the effect of vitamin D supplementation on patients with PCOS. METHODS: We performed a literature search in database and identified all of the RCTs published before December 2015 that compared the effect of vitamin D supplementation with placebo or metformin in PCOS patients. MAIN RESULTS: Nine out of 463 identified studies were included, involving 502 women presenting with PCOS. Vitamin D supplementation had significant effect on the improvement of follicular development with a higher number of dominant follicles (OR, 2...
February 2017: Complementary Therapies in Clinical Practice
https://www.readbyqxmd.com/read/28107821/effects-of-a-single-20%C3%A2-mg-dose-of-letrozole-on-ovarian-function-post-dominant-follicle-selection-an-exploratory-randomized-controlled-trial
#17
H C M Allaway, D R Chizen, G P Adams, R A Pierson
BACKGROUND: Our objective was to explore the impact of a single dose of an aromatase inhibitor (letrozole) administered at defined times of the follicular phase or immediately after ovulation on dominant follicle development, luteogenesis and new follicle wave emergence. METHODS: A prospective pilot study using a randomized complete block, controlled, open label design was conducted at an academic clinical research center. Forty-five healthy, female volunteers (25...
January 21, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28090459/anti-m%C3%A3-llerian-hormone-as-a-predictor-of-polycystic-ovary-syndrome-treated-with-clomiphene-citrate
#18
Andon Hestiantoro, Yuwono Sri Negoro, Yohana Afrita, Budi Wiweko, Kanadi Sumapradja, Muharam Natadisastra
OBJECTIVE: This study aimed to determine the threshold of anti-Müllerian hormone (AMH) as predictor of follicular growth failure in polycystic ovary syndrome (PCOS) patients treated with clomiphene citrate (CC). METHODS: Fifty female subjects with PCOS were recruited and divided into two groups based on successful and unsuccessful follicular growth. Related variables such as age, infertility duration, cigarette smoking, use of Moslem hijab, sunlight exposure, fiber intake, body mass index, waist circumference, AMH level, 25-hydroxy vitamin D level, and growth of dominant follicles were obtained, assessed, and statistically analyzed...
December 2016: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28088414/social-dominance-in-prepubertal-dairy-heifers-allocated-in-continuous-competitive-dyads-effects-on-body-growth-metabolic-status-and-reproductive-development
#19
C Fiol, M Carriquiry, R Ungerfeld
The objective of this study was to compare the body weight (BW) and size, metabolic status, and reproductive development of dominant and subordinate prepubertal dairy heifers allocated in competitive dyads. Sixteen Holstein and Jersey × Holstein prepubertal heifers (means ± SEM; 250.8 ± 9.8 d; 208.5 ± 13.9 kg of BW) were assigned to 8 homogeneous dyads according to breed, age, and BW. Dyads were housed in pens separated 1 m from each other during 120 d, receiving a total mixed ration on a 5% restriction of their potential dry matter intake, and had access to the same feeder (60 cm) throughout the experiment...
March 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28043358/the-acute-effect-of-intravenous-lipopolysaccharide-injection-on-serum-and-intrafollicular-hdl-components-and-gene-expression-in-granulosa-cells-of-the-bovine-dominant-follicle
#20
Felipe Terres de Campos, Joao Aveiro Alvarado Rincon, Diego Andres Velasco Acosta, Pedro Augusto Silva Silveira, Jorgea Pradieé, Marcio Nunes Corrêa, Bernardo Garziera Gasperin, Luiz Francisco Machado Pfeifer, Carlos Castilho Barros, Ligia Margareth Cantareli Pegoraro, Augusto Schneider
The aim of this study was to evaluate the effect of an acute systemic inflammatory response induced by lipopolysaccharide (LPS) in the serum and follicular fluid (FF) high-density lipoprotein (HDL) components, hormone concentrations and granulosa cell gene expression. For this purpose, twenty non-lactating Jersey dairy cows were submitted to a progesterone (P4) - estradiol (E2) based synchronization protocol. Cows received a single i.v. dose of LPS (2.5 μg/kg of body weight) or saline solution (CTL Group) 2 h after P4 insert removal...
February 2017: Theriogenology
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