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ovarian stimulation

Aaron Wilson, Vasily A Yakovlev
Cancer development and progression have been linked to oxidative stress, a condition characterized by unbalanced increase in ROS and RNS production. The main endogenous initiators of the redox imbalance in cancer cells are defective mitochondria, elevated NOX activity, and uncoupled NOS3. Traditionally, most attention has been paid to direct oxidative damage to DNA by certain ROS. However, increase in oxidative DNA lesions does not always lead to malignancy. Hence, additional ROS-dependent, pro-carcinogenic mechanisms must be important...
October 19, 2016: Free Radical Biology & Medicine
Funda Akpinar, Berna Dilbaz, Derya A Cırık, Saynur Yilmaz, Sadiman Kiykac, Ertugrul Karahanoglu, Leyla Mollamahmutoglu
To investigate factors associated with the response to ovarian stimulation in patients with polycystic ovary syndrome. Methods: The records of patients with polycystic ovary syndrome and infertility who underwent ovulation induction with clomiphene citrate were reviwed between January 2011 and December 2014 in Etlik Zübeyde Hanim Women's Health Training and Research Hospital Ankara, Turkey. The anthropometric and endocrine factors of patients who were resistant to treatment at a dose of 150 mg/day (n=84) were compared with those who responded with growth of at least one graaffian follicle at a dose of 50 mg/day (n=342)...
November 2016: Saudi Medical Journal
J L Dentis, N B Schreiber, A M Burress, L J Spicer
Angiogenin is a member of the ribonuclease A superfamily of proteins that has been implicated in stimulating angiogenesis but whether angiogenin can directly affect ovarian granulosa or theca cell function is unknown. Therefore, the objective of these studies was to determine the effect of angiogenin on proliferation and steroidogenesis of bovine granulosa and theca cells. In experiments 1 and 2, granulosa cells from small (1 to 5 mm diameter) follicles and theca cells from large (8 to 22 mm diameter) follicles were cultured to evaluate the dose-response effect of recombinant human angiogenin on steroidogenesis...
October 20, 2016: Animal: An International Journal of Animal Bioscience
Anya Alayev, Rachel S Salamon, Subrata Manna, Naomi S Schwartz, Adi Y Berman, Marina K Holz
Homologous recombination (HR) is a conserved process that maintains genome stability and cell survival by repairing DNA double-strand breaks (DSBs). The RAD51-related family of proteins is involved in repair of DSBs; consequently, deregulation of RAD51 causes chromosomal rearrangements and stimulates tumorigenesis. RAD51C has been identified as a potential tumor suppressor and a breast and ovarian cancer susceptibility gene. Recent studies have also implicated estrogen as a DNA-damaging agent that causes DSBs...
October 18, 2016: Cell Cycle
Marco D'Aurora, Samantha Sperduti, Giovanna Di Emidio, Liborio Stuppia, Paolo Giovanni Artini, Valentina Gatta
The somatic component of follicular structure is a mixture of different cell types, represented by Granulosa cells (GCs) that are the paracrine regulators of the oocyte growth. GCs finely support this process by a continuous bidirectional talk with oocyte, which ensure oocyte quality and competence. Specific pathways are involved in the cross-talk and in both GCs and oocyte development. This review summarizes data from GCs gene expression analysis concerning both their physiological role and their interaction with oocyte...
October 18, 2016: Gynecological Endocrinology
Maria Vadalà, Julio Cesar Morales-Medina, Annamaria Vallelunga, Beniamino Palmieri, Carmen Laurino, Tommaso Iannitti
Cancer is one of the most common causes of death worldwide. Available treatments are associated with numerous side effects and only a low percentage of patients achieve complete remission. Therefore, there is a strong need for new therapeutic strategies. In this regard, pulsed electromagnetic field (PEMF) therapy presents several potential advantages including non-invasiveness, safety, lack of toxicity for non-cancerous cells, and the possibility of being combined with other available therapies. Indeed, PEMF stimulation has already been used in the context of various cancer types including skin, breast, prostate, hepatocellular, lung, ovarian, pancreatic, bladder, thyroid, and colon cancer in vitro and in vivo...
October 17, 2016: Cancer Medicine
Veronika Günther, Ibrahim Alkatout, Corinna Fuhs, Ali Salmassi, Liselotte Mettler, Jürgen Hedderich, Nicolai Maass, Mohamed Elessawy, Andreas Gerd Schmutzler, Christel Eckmann-Scholz
Cytokines are key modulators of the immune system and play an important role in the ovarian cycle. IL-18 levels in serum and follicular fluid were analyzed in women undergoing in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) treatment. The cohort study group consisted of 90 women, who were undergoing IVF or ICSI. The body mass index (BMI) was determined in all patients; IL-18 levels were measured in follicular fluid and serum. IL-18 levels in serum were significantly higher than those in follicular fluid...
2016: BioMed Research International
Radoslava Vlčková, Drahomíra Sopková, Zuzana Andrejčáková, Igor Valocký, Attila Kádasi, Abdel Halim Harrath, Vladimír Petrilla, Alexander V Sirotkin
Yucca (Yucca schidigera) is a popular medicinal plant due to its many positive effects on animal and human physiology, including their reproductive systems. To examine the effect of supplemental yucca feeding on sheep reproduction, including ovarian functions and their hormonal regulators, ewes were fed (or not fed, control) yucca powder (1.5 g/head/day, 30 days). Macromorphometric indexes of the oviduct, ovary, and ovarian folliculogenesis were measured. Reproductive hormone levels in the blood were measured using a radioimmunoassay...
September 21, 2016: Theriogenology
N S Mehl, S Srisuwatanasagul, T Swangchan-Uthai, S Sirivaidyapong, M Khalid
Effect of a GnRH-agonist (deslorelin) was studied on reproductive function and ovarian luteinizing hormone receptor (LHR) and follicle stimulating hormone receptor (FSHR) expression in prepubertal female cats that were either implanted with 4.7-mg deslorelin (implanted: n = 6) or not (controls: n = 18) or ovariohysterectomized at prepubertal age (prepubertal OVH: n = 6). Body weights, fecal estradiol, and sexual behavior of implanted and control cats were monitored for 48 weeks followed by collection of ovaries and uteri...
September 9, 2016: Theriogenology
Saghar Salehpour, Marzieh Zamaniyan, Nasrin Saharkhiz, Shahrzad Zadeh Modares, Sedighe Hosieni, Samira Seif, Narges Malih, Parinaz Rezapoor, Mohammad-Reza Sohrabi
BACKGROUND: Recurrent implantation failure is one of the most issues in IVF cycles. Some researchers found that beneficial effects of endometrial Scratching in women with recurrent implantation failure, while some authors demonstrated contrary results. OBJECTIVE: The present study aimed to investigate the effect of intrauterine. Saline infusion as a form of endometrial injury, during fresh in vitro fertilization-embryo transfer cycle, among patients with recurrent implantation failure...
September 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
Ashraf Alyasin, Shayesteh Mehdinejadiani, Marzieh Ghasemi
Routinely, a bolus of 5.000-10.000 IU human chorionic gonadotropin (hCG) is used for the final follicular maturation and ovulation as a standard method. HCG has the same effect of luteinizing hormone (LH) with long half-life. It has the long lutheotrophic effect which increases the risk of ovarian hyper stimulation syndrome (OHSS). Recently, gonadotropin-releasing hormone agonist (GnRH-a) trigger has been used for the induction of final follicular maturation and ovulation with the aim of reducing the OHSS risk...
September 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
Ishita Ganguly, Aparna Singh, Shilpa Bhandari, Pallavi Agrawal, Nitika Gupta
Introduction. Aim of the study was to find the effect of various prognostic factors in cases of unexplained infertility undergoing controlled ovarian stimulation (COS) with intrauterine insemination (IUI). Methods. 146 cases of unexplained infertility were included. A maximum of 3 cycles of IUI were done with clomiphene citrate/HMG. Ovulation trigger was given when the largest follicle diameter was >18 mm, and IUI was planned 36 hours later. Luteal phase support was given for 15 days, urine pregnancy test was done on day 15, ultrasonography was done at 7 weeks, and pregnancy was followed up till delivery...
2016: International Journal of Reproductive Medicine
Tycho E T Mevissen, Yogesh Kulathu, Monique P C Mulder, Paul P Geurink, Sarah L Maslen, Malte Gersch, Paul R Elliott, John E Burke, Bianca D M van Tol, Masato Akutsu, Farid El Oualid, Masato Kawasaki, Stefan M V Freund, Huib Ovaa, David Komander
The post-translational modification of proteins with polyubiquitin regulates virtually all aspects of cell biology. Eight distinct chain linkage types co-exist in polyubiquitin and are independently regulated in cells. This 'ubiquitin code' determines the fate of the modified protein. Deubiquitinating enzymes of the ovarian tumour (OTU) family regulate cellular signalling by targeting distinct linkage types within polyubiquitin, and understanding their mechanisms of linkage specificity gives fundamental insights into the ubiquitin system...
October 12, 2016: Nature
D H Mendez Lozano, M V Lenero, R L Gonzalez, J B Scheffer, M T Gonzalez, Y Barron, R Frydman
AIM OF THE STUDY: The objective of this study was to assess the impact of tadalafil on endometrial growth, the uterine artery pulsatility index (PI) and the uterine artery resistance index (RI) in patients under clomiphene ovarian stimulation for intrauterine insemination (IUI). METHODS: This randomized crossover study included 30 patients with a normal endometrium over 53 cycles, and 46 of those cycles in 23 patients were included in the analysis. In group A the patients were under 100 mg clomiphene daily for five days (2-6) and 5 mg tadalafil daily for 7 days (4-10)...
December 28, 2015: Facts, Views & Vision in ObGyn
Muhammad Abdul Mabood Khalil, Muhammad Salman Ghazni, Jackson Tan, Nazish Naseer, Muhammad Ashhad Ullah Khalil
Ovarian hyperstimulation syndrome (OHSS) was first described in 1960. It may occur as a complication of gonadotropin hormone therapy during assisted pregnancy or for primary infertility. A 26-year-old female patient with polycystic ovarian syndrome and primary infertility was treated to conceive. She received intravenous gonadotropin-releasing hormone (GnRH) along with follicle-stimulating hormone in an outside private clinic. She presented to the emergency department with abdominal and chest pain, loose stool, vomiting, shortness of breath and decreasing urine output...
May 2016: Case Reports in Gastroenterology
Voravasa Chaiworakul, Sunantha Kosonsiriluk, Laura J Mauro, Mohamed E El Halawani
The mechanism(s) underlying photorefractoriness in temperate zone seasonally breeding birds remains undetermined. Our recent findings reveal a link between the upregulation of GABAA receptors (GABAARs) in the premammillary nucleus (PMM) and the state of photorefractoriness. Gonadal steroid levels fluctuate during the breeding season; increasing after gonadal recrudescence and declining sharply once gonadal regression begins. Here, we examined the effect of gonadal steroid withdrawal on the expression of GABAARs in the turkey PMM...
October 4, 2016: General and Comparative Endocrinology
F Acıbucu, D O Acıbucu, Ö B Akkar, H S Dokmetas
Introduction: Radioactive iodine (RAI) ablation treatment is used for patients diagnosed with well-differentiated thyroid cancer in order to reduce the risk of recurrence. RAI ablation treatment can adversely affect gonads in males and females. In this study, we aimed to determine ovary damage and infertility risk due to RAI, using serum anti-Müllerian hormone (AMH) level, in females who received RAI ablation treatment. Materials and Methods: 45 female patients who have not gone through the menopause and had received RAI ablation treatment for well-differentiated thyroid cancer in premenopausal period, and 40 healthy females as control groups were included in this study...
October 6, 2016: Experimental and Clinical Endocrinology & Diabetes
Liza Margareth Medeiros de Carvalho Sousa, Gabriela Pacheco Mendes, Danila Barreiro Campos, Pietro Sampaio Baruselli, Paula de Carvalho Papa
We hypothesized that stimulatory and superovulatory treatments, using equine chorionic gonadotropin (eCG), modulate the expression of genes related to insulin, cellular modelling and angiogenesis signaling pathways in the bovine corpus luteum (CL). Therefore, we investigated: 1-the effect of these treatments on circulating insulin and somatomedin C concentrations and on gene and protein expression of INSR, IGF1 and IGFR1, as well as other insulin signaling molecules; 2-the effects of eCG on gene and protein expression of INSR, IGF1, GLUT4 and NFKB1A in bovine luteal cells; and 3-the effect of stimulatory and superovulatory treatments on gene and protein expression of ANG, ANGPT1, NOS2, ADM, PRSS2, MMP9 and PLAU...
2016: PloS One
Jane Antony, Tuan Zea Tan, Zoe Kelly, Jeffrey Low, Mahesh Choolani, Chiara Recchi, Hani Gabra, Jean Paul Thiery, Ruby Yun-Ju Huang
Ovarian cancer is a complex disease with heterogeneity among the gene expression molecular subtypes (GEMS) between patients. Patients with tumors of a mesenchymal ("Mes") subtype have a poorer prognosis than patients with tumors of an epithelial ("Epi") subtype. We evaluated GEMS of ovarian cancer patients for molecular signaling profiles and assessed how the differences in these profiles could be leveraged to improve patient clinical outcome. Kinome enrichment analysis identified AXL as a particularly abundant kinase in Mes-subtype tumor tissue and cell lines...
October 4, 2016: Science Signaling
Bradley J Monk, Andrea Facciabene, William E Brady, Carol Aghajanian, Paula M Fracasso, Joan Walker, Heather A Lankes, Kristi L Manjarrez, Gwenn Danet-Desnoyers, Katherine M Bell-McGuinn, Carolyn K McCourt, Alexander Malykhin, Robert M Hershberg, George Coukos
BACKGROUND: Immunotherapy is an emerging paradigm for the treatment of cancer, but the potential efficacy of many drugs cannot be sufficiently tested in the mouse. We sought to develop a rational combination of motolimod-a novel Toll-like receptor 8 (TLR8) agonist that stimulates robust innate immune responses in humans but diminished responses in mice-with pegylated liposomal doxorubicin (PLD), a chemotherapeutic that induces immunogenic cell death. METHODS: We followed an integrative pharmacologic approach including healthy human volunteers, non-human primates, NSG-HIS ("humanized immune system") mice reconstituted with human CD34+ cells, and cancer patients to test the effects of motolimod and to assess the combination of motolimod with PLD for the treatment of ovarian cancer...
October 4, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
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