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https://www.readbyqxmd.com/read/28911882/aromatase-inhibitors-a-new-approach-for-controlling-ovarian-function-in-cattle
#1
M J Yapura, E M Zwiefelhofer, R A Pierson, G P Adams
Numerous treatments and protocols have been used to control the reproductive cycle in cattle, with varying effectiveness and many involving the administration of steroid hormones. Steroid hormones, such as estradiol, are perceived as having a negative impact on consumer health. This internationally shared opinion has led to a ban on the use of steroid hormones in food producing animals in many countries (i.e., European Union, New Zealand, and Australia). Letrozole, a non-steroidal aromatase inhibitor, inactivates the aromatase enzyme responsible for the synthesis of estrogens by reversibly binding to the "heme" group of the P450 subunit...
September 11, 2017: Theriogenology
https://www.readbyqxmd.com/read/28886344/a-recurrent-missense-mutation-in-zp3-causes-empty-follicle-syndrome-and-female-infertility
#2
Tailai Chen, Yuehong Bian, Xiaoman Liu, Shigang Zhao, Keliang Wu, Lei Yan, Mei Li, Zhenglin Yang, Hongbin Liu, Han Zhao, Zi-Jiang Chen
Empty follicle syndrome (EFS) is defined as the failure to aspirate oocytes from mature ovarian follicles during in vitro fertilization. Except for some cases caused by pharmacological or iatrogenic problems, the etiology of EFS remains enigmatic. In the present study, we describe a large family with a dominant inheritance pattern of female infertility characterized by recurrent EFS. Genome-wide linkage analyses and whole-exome sequencing revealed a paternally transmitted heterozygous missense mutation of c...
September 7, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28881231/follicles-and-gonadotropins-during-waves-2-and-3-in-three-wave-interovulatory-intervals-in-bos-taurus-heifers
#3
O J Ginther, M A R Siddiqui, E R Araujo, S V Dangudubiyyam
Observations were made on follicle dynamics and gonadotropin concentrations in anovulatory wave 2 and ovulatory wave 3 in three-wave interovulatory intervals (n = 15). Hypotheses were not used owing to inadequate availability of rationale. The future dominant follicles for waves 2 and 3 were designated DF2 and DF3 and the largest future subordinate follicles as SF2 and SF3, respectively. The day of expected diameter deviation (day 0) was defined as the day that DF2 or DF3 was closest to 8.5 mm. The first day that DF2 became smaller (P < 0...
August 30, 2017: Theriogenology
https://www.readbyqxmd.com/read/28870217/controlled-ovulation-of-the-dominant-follicle-using-progestin-in-minimal-stimulation-in-poor-responders
#4
Qiuju Chen, Yun Wang, Lihua Sun, Shaozhen Zhang, Weiran Chai, Qingqing Hong, Hui Long, Li Wang, Qifeng Lyu, Yanping Kuang
BACKGROUND: The use of progestin (P) during ovarian stimulation is effective in blocking the luteinizing hormone (LH) surge in women with normal ovarian reserve, however, its effects have not been determined in poor responders. This study aimed to explore the follicular dynamics in P-primed minimal stimulation in poor responders. METHODS: A total of 204 infertile women with diminished ovarian reserve were allocated into the medroxyprogesterone acetate (MPA) group or the natural-cycle control group in an alternating order...
September 5, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28863349/effect-of-bovine-somatotropin-injection-in-late-pregnant-holstein-heifers-on-metabolic-parameters-and-steroidogenic-potential-of-the-first-postpartum-dominant-follicle
#5
Diego Andres Velasco Acosta, Augusto Schneider, Carolina Bespalhok Jacometo, Joao Alvarado Rincon, Felipe Cardoso, Marcio Nunes Corrêa
The aim of this study was to determine the effect of pre-partum injections of bovine somatotropin (bST) in dairy heifers on metabolic markers and the steroidogenic potential of the first postpartum dominant follicle. Heifers were assigned to two groups: bST (ST; n = 29), that received two doses of bST (500 mg/dose) at -28 and -14 days relative to calving; and control (CTL; n = 30), that did not received bST. Follicular development was monitored via ultrasound every 3 days starting at 8 days in milk (DIM) in a subset of 20 heifers until the day the first large follicle reached a diameter of 16 mm...
August 26, 2017: Theriogenology
https://www.readbyqxmd.com/read/28840634/influence-of-luteinizing-hormone-support-on-granulosa-cells-transcriptome-in-cattle
#6
Anne-Laure Nivet, Christian Vigneault, Patrick Blondin, Marc-Andre Sirard
In cows, the use of follicle-stimulating hormone (FSH) to stimulate follicular growth followed by a short period of FSH withdrawal has been shown to be beneficial for oocyte developmental competence. Although this treatment represents a useful optimization to generate highly competent oocytes, the underlying physiological process is not completely understood. The goal of this study was to investigate the role of luteinizing hormone (LH) action during FSH withdrawal before ovulation. To accomplish this, LH release was pharmacologically inhibited during the coasting period with gonadotropin-releasing hormone (GnRH) antagonists...
August 25, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28830544/il-18-associated-with-lung-lymphoid-aggregates-drives-ifn%C3%AE-production-in-severe-copd
#7
Emmanuel Briend, G John Ferguson, Michiko Mori, Gautam Damera, Katherine Stephenson, Natasha A Karp, Sanjay Sethi, Christine K Ward, Matthew A Sleeman, Jonas S Erjefält, Donna K Finch
BACKGROUND: Increased interferon gamma (IFNγ) release occurs in Chronic Obstructive Pulmonary Disease (COPD) lungs. IFNγ supports optimal viral clearance, but if dysregulated could increase lung tissue destruction. METHODS: The present study investigates which mediators most closely correlate with IFNγ in sputum in stable and exacerbating disease, and seeks to shed light on the spatial requirements for innate production of IFNγ, as reported in mouse lymph nodes, to observe whether such microenvironmental cellular organisation is relevant to IFNγ production in COPD lung...
August 22, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28826601/significant-correlation-between-anti-m%C3%A3-llerian-hormone-and-embryo-euploidy-in-a-subpopulation-of-infertile-patients
#8
Itai Gat, Basheer AlKudmani, Karen Wong, Khaled Zohni, Noga Fuchs Weizman, Clifford Librach, Prati Sharma
Anti-Müllerian hormone (AMH) is a standard marker of ovarian reserve. Correlation between AMH and egg euploidy is controversial. We evaluated the association between AMH and blastocyst euploidy rate examined by pre-implantation genetic screening (PGS). This retrospective study was conducted at the CReATe Fertility Centre. We included single IVF cycles of 216 infertile couples, which resulted in 911 blastocysts subjected to array comparative genomic hybridization and evaluated IVF outcome after embryo transfer...
August 1, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28817115/administration-of-follicle-stimulating-hormone-induces-autophagy-via-upregulation-of-hif-1%C3%AE-in-mouse-granulosa-cells
#9
Jilong Zhou, Wang Yao, Chengyu Li, Wangjun Wu, Qifa Li, Honglin Liu
Recent studies reported the important role of autophagy in follicular development. However, the underlying molecular mechanisms remain elusive. In this study, we investigated the effect of follicle-stimulating hormone (FSH) on mouse granulosa cells (MGCs). Results indicated that autophagy was induced by FSH, which is known to be the dominant hormone regulating follicular development and granulosa cell (GC) proliferation. The activation of mammalian target of rapamycin (mTOR), a master regulator of autophagy, was inhibited during the process of MGC autophagy...
August 17, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28805452/birt-hogg-dube-syndrome-with-a-novel-mutation-in-the-flcn-gene
#10
Gulsum Kayhan, Nilgun Yılmaz Demirci, Haluk Turktas, Mehmet Ali Ergun
BACKGROUND: Birt-Hogg-Dube syndrome (BHDS) is an autosomal dominant disease characterized by hair follicle hamartomas, kidney tumors, and spontaneous pneumothorax; its cause is a heterozygous mutation in the FLCN gene. Colorectal polyps and carcinoma have also been reported in BHDS. FLCN mutations can be detected in patients with isolated primary spontaneous pneumothorax (PSP), so PSP may present as part of BHDS. The aim of this report is to enhance awareness that patients presenting with spontaneous PSP should be evaluated for FLCN mutations...
August 14, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28796038/clomiphene-citrate-is-associated-with-favorable-cycle-characteristics-but-impaired-outcomes-of-obese-women-with-polycystic-ovarian-syndrome-undergoing-ovarian-stimulation-for-in-vitro-fertilization
#11
Shutian Jiang, Yanping Kuang
The aim of this study was to explore the effect of clomiphene citrate (CC) on the cycle characteristics and outcomes of obese women with polycystic ovarian syndrome (PCOS) undergoing ovarian stimulation for in vitro fertilization (IVF).This is a retrospective cohort study, and it was conducted at the tertiary-care academic medical center.This study included 174 obese PCOS patients undergoing IVF.In the study group (n = 90), CC and human menopausal gonadotropin (HMG) were administered simultaneously beginning on cycle day 3, while in control group (n = 84) HMG was used only...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28783591/association-of-gene-polymorphisms-of-estrogen-receptor-follicle-stimulating-hormone-%C3%AE-and-leptin-with-follicular-cysts-in-large-white-sows
#12
Haotian Wang, Lu Chen, Yanwen Jiang, Shan Gao, Shuxiong Chen, Xue Zheng, Zhuo Liu, Yun Zhao, Hongjiao Li, Jiaxin Yu, Fengge Wang, Yating Liu, Chunjin Li, Xu Zhou
Ovarian follicular cysts are one of leading causes of infertility and financial loss in pig breeding program. This study was carried out to investigate the association between polymorphisms of estrogen receptor (ESR), follicle-stimulating hormone (FSH) β, and leptin genes and follicular cysts in sows. A total of 47 and 120 sows with follicular cysts and normal follicles, respectively, were selected to evaluate whether these candidate loci affect the formation of follicular cysts in sows. The polymorphisms of ESR, FSHβ, FSHβ/HaeIII and leptin genes were tested by PCR and PCR-RFLP methods...
November 2017: Theriogenology
https://www.readbyqxmd.com/read/28774739/are-there-any-differences-between-antagonist-administration-on-days-6-and-%C3%A2-6-of-coh-on-assisted-reproductive-technique-outcomes
#13
Zeynep Ozturk Inal, Nafiye Yilmaz, Hasan Ali Inal, Necati Hancerliogullari, Bugra Coskun
BACKGROUND: The aim of this study was to investigate the cost-effectiveness of antagonist administration on stimulation on days <6 and ≥6 of COH on assisted reproductive technique (ART) outcomes. METHODS: In this retrospective cohort study, 412 patients who were admitted to the ART Department were evaluated. In group 1 (203 patients), antagonist administration was provided on days <6 of COH. For group 2 (209 patients), antagonist administration was provided on days ≥6 of COH...
July 31, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28771718/effect-of-follicular-diameter-at-the-time-of-ovulation-triggering-on-pregnancy-outcomes-during-intrauterine-insemination
#14
Mohammad A Maher, Ahmed Abdelaziz, Yasser A Shehata
OBJECTIVE: To compare pregnancy outcomes when triggering ovulation at different follicle sizes during intrauterine insemination (IUI) cycles. METHODS: A prospective observational study was undertaken at two collaborative fertility centers in Saudi Arabia between January 2014 and May 2016. Women of any age were enrolled if they met inclusion criteria: primary, secondary, or unexplained infertility (≥1 year); day-2 follicle-stimulating hormone less than 12 IU/mL; normal prolactin, thyroid function, and uterine cavity; at least one patent tube; and a male partner with normal semen count and motility...
August 3, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28758258/dominant-follicles-development-and-estradiol-17%C3%AE-concentrations-in-non-ovulating-and-ovulating-post-partum-bulgarian-murrah-buffaloes
#15
S Yotov, A Atanasov
This study was designed to evaluate the dominant follicles development and the estradiol-17β concentrations in non-ovulating and ovulating post-partum buffaloes. Sixteen Bulgarian Murrah buffaloes were submitted to transrectal ultrasonographic examination from the 1st post-partum day until day 50, 3 days apart. The follicular diameter of the different categories of follicles and the ovulations was recorded. The animals were allocated into two groups: I (n = 6) non-ovulating and II (n = 10) ovulating buffaloes...
July 30, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28749022/effects-of-gnrh-a-progesterone-releasing-device-and-energy-balance-on-an-oestrus-synchronisation-program-in-anoestrous-dairy-cows
#16
S K Sahu, J F Cockrem, T J Parkinson, R A Laven
OBJECTIVE: The aim of this research was to study the roles of the day 0 energy balance and gonadotrophin-releasing hormone (GnRH) and progesterone levels on dominant follicle (DF) and corpus luteum (CL) development during the first 7 days of a gonadotrophin-prostaglandin-gonadotrophin (GPG) + progesterone (P4) program in anoestrous dairy cows. METHODS: Cows (n = 81) were allocated to one of the three treatments: (1) GPG + P4 (days 0 and 9, 100 µg GnRH; day 0-7, intravaginal P4 device; day 7, 500 µg PGF2α ); (2) GPG (as for treatment 1 but excluding the P4 device) and (3) prostaglandin + GnRH + P4 (as for treatment 1, but excluding day 0 GnRH)...
August 2017: Australian Veterinary Journal
https://www.readbyqxmd.com/read/28742467/polycystic-ovary-syndrome-in-adolescents-which-mr-imaging-based-diagnostic-criteria
#17
Maxime Fondin, Antoine Rachas, Van Huynh, Stéphanie Franchi-Abella, Jean-Paul Teglas, Lise Duranteau, Catherine Adamsbaum
Purpose To evaluate the validity and reproducibility of magnetic resonance (MR) imaging-based ovarian morphologic measurements for diagnosis of polycystic ovary syndrome (PCOS) in adolescents. Materials and Methods This case-control study included 110 adolescent girls (age range, 13-17 years) who underwent pelvic MR imaging in 2006-2015. The case group included girls with high (n = 40, hyperandrogenism and oligomenorrhea or amenorrhea), intermediate (n = 8, hyperandrogenism), or low (n = 7, oligomenorrhea or amenorrhea) suspicion of PCOS...
July 25, 2017: Radiology
https://www.readbyqxmd.com/read/28735299/identification-of-the-first-dominant-mutation-of-lama5-gene-causing-a-complex-multisystem-syndrome-due-to-dysfunction-of-the-extracellular-matrix
#18
Simone Sampaolo, Filomena Napolitano, Alfonsina Tirozzi, Mafalda Giovanna Reccia, Luca Lombardi, Olimpia Farina, Adriano Barra, Ferdinando Cirillo, Mariarosa Anna Beatrice Melone, Fernando Gianfrancesco, Giuseppe Di Iorio, Teresa Esposito
BACKGROUND: The laminin alpha 5 gene (LAMA5) plays a master role in the maintenance and function of the extracellular matrix (ECM) in mammalian tissues, which is critical in developmental patterning, stem cell niches, cancer and genetic diseases. Its mutations have never been reported in human disease so far. The aim of this study was to associate the first mutation in LAMA5 gene to a novel multisystem syndrome. METHODS: A detailed characterisation of a three-generation family, including clinical, biochemical, instrumental and morphological analysis, together with genetics and expression (WES and RNAseq) studies, was performed...
July 22, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28708535/comparison-of-estrus-synchronization-by-controlled-internal-drug-release-device-cidr-and-adhesive-transdermal-progestin-patch-in-postpartum-beef-cows
#19
Jatuporn Kajaysri, Chaiwat Chumchoung, Supphathat Wutthiwitthayaphong, Wanvipa Suthikrai, Praphai Sangkamanee
Estrous synchronization with progesterone based protocols has been essentially used in cattle industry. Although intravaginal devices have been commonly used, this technique may induce vaginitis. This study aimed at examining the efficiency of novel transdermal progestin patch on follicle development and comparing the progestin patch versus CIDR device on estrous synchronization, complication at treated site and pregnancy in beef cattle. In experiment 1, seven beef cows were treated with an adhesive transdermal progestin patch on the ventral surface of the proximal part of the tail for 7 days...
June 6, 2017: Theriogenology
https://www.readbyqxmd.com/read/28708532/blood-flow-and-echotextural-differences-between-the-future-dominant-and-subordinate-follicles-before-the-beginning-of-diameter-deviation-in-heifers
#20
O J Ginther, R R Domingues, M A R Siddiqui, S V Dangudubiyyam
Diameter deviation is the beginning of a decrease in growth rate of the largest subordinate follicle (SF) and a continuing growth rate of the dominant follicle (DF). In wave 1 in cattle, deviation begins 2 or 3 days after ovulation when the future DF is about 8.5 mm. Gray scale and power-flow Doppler ultrasound examinations were done in experiment 1 (daily examinations, n = 13) and experiment 2 (examinations every 8 h, n = 15). Blood flow and an anechoic layer in the follicle wall were normalized to the beginning of diameter deviation (day 0 or hour 0)...
May 31, 2017: Theriogenology
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