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Ovarian trigger

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https://www.readbyqxmd.com/read/30552344/debio-1143-an-iap-inhibitor-reverses-carboplatin-resistance-in-ovarian-cancer-cells-and-triggers-apoptotic-or-necroptotic-cell-death
#1
Benoît Thibault, Ludivine Genre, Augustin Le Naour, Clothilde Broca, Eliane Mery, Grégoire Vuagniaux, Jean Pierre Delord, Norbert Wiedemann, Bettina Couderc
The poor prognosis of ovarian cancer (it is the leading cause of death from gynecological cancers) is mainly due to the acquisition of resistance to carboplatin. Among the possible resistance pathways, resistance to apoptosis and especially the overexpression of inhibitor of apoptosis proteins (IAP) cIAP1 and X-linked IAP (XIAP), have been implicated. DEBIO 1143, a SMAC (second mitochondria-derived activator of caspase) mimetic, belongs to a new class of targeted agents currently being evaluated in clinical trials, which activate apoptotic cell death and block pro-survival signaling in cancer cells...
December 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30540933/parp-inhibition-elicits-sting-dependent-antitumor-immunity-in-brca1-deficient-ovarian-cancer
#2
Liya Ding, Hye-Jung Kim, Qiwei Wang, Michael Kearns, Tao Jiang, Carolynn E Ohlson, Ben B Li, Shaozhen Xie, Joyce F Liu, Elizabeth H Stover, Brooke E Howitt, Roderick T Bronson, Suzan Lazo, Thomas M Roberts, Gordon J Freeman, Panagiotis A Konstantinopoulos, Ursula A Matulonis, Jean J Zhao
PARP inhibitors have shown promising clinical activities for patients with BRCA mutations and are changing the landscape of ovarian cancer treatment. However, the therapeutic mechanisms of action for PARP inhibition in the interaction of tumors with the tumor microenvironment and the host immune system remain unclear. We find that PARP inhibition by olaparib triggers robust local and systemic antitumor immunity involving both adaptive and innate immune responses through a STING-dependent antitumor immune response in mice bearing Brca1-deficient ovarian tumors...
December 11, 2018: Cell Reports
https://www.readbyqxmd.com/read/30540228/activin-a-in-mammalian-physiology
#3
Enrrico Bloise, Pasquapina Ciarmela, Cynthia Dela Cruz, Stefano Luisi, Felice Petraglia, Fernando M Reis
Activins are dimeric glycoproteins belonging to the transforming growth factor beta superfamily and resulting from the assembly of two beta subunits, which may also be combined with alpha subunits to form inhibins. Activins were discovered in 1986 following the isolation of inhibins from porcine follicular fluid, and were characterized as ovarian hormones that stimulate follicle stimulating hormone (FSH) release by the pituitary gland. In particular, activin A was shown to be the isoform of greater physiological importance in humans...
January 1, 2019: Physiological Reviews
https://www.readbyqxmd.com/read/30529793/comparison-of-the-follicular-output-rate-after-controlled-ovarian-stimulation-with-daily-recombinant-follicle-stimulating-hormone-versus-corifollitropin-alfa
#4
Georg Griesinger, Valerie Teal, Christine McCrary Sisk, Jane Ruman
OBJECTIVE: To compare the Follicular Output Rate (FORT) between corifollitropin alfa (CFA) and recombinant follicle-stimulating hormone (rFSH) during controlled ovarian stimulation (COS). STUDY DESIGN: This retrospective analysis compared FORT between women treated with CFA or rFSH from three clinical trials: ENGAGE (N = 1476; ages 18-36, >60 kg), ENSURE (N = 395; ages 18-36, ≤60 kg), and PURSUE (N = 1388; ages 35-42, ≥50 kg). Women underwent COS in a GnRH antagonist protocol followed by hCG trigger prior to IVF...
November 5, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/30514289/glycolysis-inhibition-via-mtor-suppression-is-a-key-step-in-cardamonin-induced-autophagy-in-skov3-cells
#5
Daohua Shi, Di Zhao, Peiguang Niu, Yanting Zhu, Jintuo Zhou, Huajiao Chen
BACKGROUND: Autophagy occurs in cells that undergoing nutrient deprivation. Glycolysis rapidly supplies energy for the proliferation of cancer cells. Cardamonin inhibits proliferation and enhances autophagy by mTORC1 suppression in ovarian cancer cells. Here, we investigate the relationship between cardamonin-triggered autophagy and glycolysis inhibition via mTORC1 suppression. METHODS: Treated with indicated compounds, ATP content and the activity of hexokinase (HK) and lactate dehydrogenase (LDH) were analyzed by the assay kits...
December 4, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/30503728/assisted-reproduction-in-endometriosis
#6
REVIEW
Dominique de Ziegler, Paul Pirtea, Marie Carbonnel, Marine Poulain, Ettore Cicinelli, Carlo Bulletti, Konstantinos Kostaras, George Kontopoulos, David Keefe, Jean Marc Ayoubi
Endometriosis - a disease causing pain and infertility - is encountered in nearly 50% of infertile women. While medical treatment is effective on pain and recurrence of symptoms after surgical excision, it is of no help for treating infertility for which the only options considered are surgery and ART. Surgery enhances the chances of conceiving naturally during the 12-18 ensuing months irrespective of the stage of the disease. Surgery however is of no help when ART is considered, as it does not improve outcome and can only harm the ovarian response to stimulation...
November 3, 2018: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/30483911/rare-genetic-variants-potentially-involved-in-ovarian-hyperstimulation-syndrome
#7
Katrien Stouffs, Sari Daelemans, Samuel Santos-Ribeiro, Sara Seneca, Alexander Gheldof, Ali Sami Gürbüz, Michel De Vos, Herman Tournaye, Christophe Blockeel
PURPOSE: We aim to investigate whether there is a genetic predisposition in women who developed ovarian hyperstimulation syndrome (OHSS) after GnRH antagonist protocol with GnRH agonist trigger and freeze-all approach. METHODS: Four patients with OHSS after GnRH agonist trigger and freeze-all approach were gathered from the worldwide patient population. These patients were analyzed through Whole Exome Sequencing. In this study known causes of OHSS were investigated and new causes present in at least two individuals were searched for...
November 27, 2018: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/30478915/comparative-transcriptome-analysis-reveals-perp-upregulated-during-salmonella-enteritidis-challenge-in-laying-ducks
#8
Yu Zhang, Tian-Tian Gu, Yang Chen, Yu Huang, Jinping Du, Lizhi Lu, Guo-Qiang Zhu, Qi Xu, Guo-Hong Chen
Salmonella Enteritidis (SE) can be transmitted to eggs through cecum or the ovary from infected layers and causes food poisoning in humans. The mechanism of cecal transmission has been extensively studied. However, the mechanism and route of transovarian transmission of SE remain unclear. In this study, the ducks were orally inoculated with SE, and the ovarian follicles and stroma were collected to detect SE infection. The immune responses were triggered and the innate and adaptive immune genes (TLR4, NOD1, AvβD7, and IL-1β) were upregulated significantly during the SE challenge...
November 27, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/30478051/dual-functions-for-ovaal-in-initiation-of-raf-mek-erk-prosurvival-signals-and-evasion-of-p27-mediated-cellular-senescence
#9
Ben Sang, Yuan Yuan Zhang, Su Tang Guo, Ling Fei Kong, Qiong Cheng, Guang Zhi Liu, Rick F Thorne, Xu Dong Zhang, Lei Jin, Mian Wu
Long noncoding RNAs (lncRNAs) function through a diverse array of mechanisms that are not presently fully understood. Here, we sought to find lncRNAs differentially regulated in cancer cells resistant to either TNF-related apoptosis-inducing ligand (TRAIL) or the Mcl-1 inhibitor UMI-77, agents that act through the extrinsic and intrinsic apoptotic pathways, respectively. This work identified a commonly up-regulated lncRNA, ovarian adenocarcinoma-amplified lncRNA (OVAAL), that conferred apoptotic resistance in multiple cancer types...
November 26, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/30476103/insulin-reduces-reaction-of-follicular-granulosa-cell-to-fsh-stimulation-in-obesity-related-infertility-women-during-ivf
#10
Pei Xu, Bao-Yi Huang, Jia-Hui Zhan, Man-Ting Liu, Yang Fu, You-Qiang Su, Qing-Yuan Sun, Wei-Hua Wang, Dun-Jin Chen, Jian-Qiao Liu
Context: Obese women usually need larger doses of FSH for ovarian stimulation, resulting in poor outcomes; however, the mechanism is still unclear. Objective: To investigate the molecular regulation of FSH receptor (FSHR) expression associated with obesity. Design: Case-control study to improve IVF outcomes. Patients: Eighty-two obese and 457 overweight women undergoing IVF and 1,790 age-matched controls with normal weight from our reproductive medicine center...
November 21, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/30467617/can-peri-ovulatory-putrescine-supplementation-improve-egg-quality-in-older-infertile-women
#11
REVIEW
Yong Tao, Alina Tartia, Maralee Lawson, Mary B Zelinski, Wei Wu, Jia-Yin Liu, Johan Smitz, Marie-Claude Léveillé, Arthur Leader, Hongmei Wang, Timothy Ramsay, X Johné Liu
The aging-related decline in fertility is an increasingly pressing medical and economic issue in modern society where women are delaying family building. Increasingly sophisticated, costly, and often increasingly invasive, assisted reproductive clinical protocols and laboratory technologies (ART) have helped many older women achieve their reproductive goals. Current ART procedures have not been able to address the fundamental problem of oocyte aging, the increased rate of egg aneuploidy, and the decline of developmental potential of the eggs...
November 22, 2018: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/30461191/suppression-of-ovarian-follicle-development-by-nano-tio-2-is-associated-with-tgf-%C3%AE-mediated-signaling-pathways
#12
Yingjun Zhou, Fashui Hong, Nan Wu, Jianhui Ji, Yonghua Cui, Jinyan Li, Juan Zhuang, Ling Wang
Nanoparticulate titanium dioxide (nano TiO2 ) is extensively applied in biological tissue engineering materials, food additives, cosmetics, and sunscreens. Numerous studies to date have demonstrated that nano TiO2 penetrates through the digestive system and possibly the blood circulation, leading to accumulation in the ovary and consequent reproductive toxicity. However, the mechanisms underlying the toxic effects of nano TiO2 on the female reproductive system remain to be established. In this study, female mice were exposed to different doses of nano TiO2 (1...
November 21, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/30429105/pai-1-secreted-from-metastatic-ovarian-cancer-cells-triggers-the-tumor-promoting-role-of-the-mesothelium-in-a-feedback-loop-to-accelerate-peritoneal-dissemination
#13
Yang Peng, Hiroaki Kajiyama, Hong Yuan, Kae Nakamura, Masato Yoshihara, Akira Yokoi, Kayo Fujikake, Hiroaki Yasui, Nobuhisa Yoshikawa, Shiro Suzuki, Takeshi Senga, Kiyosumi Shibata, Fumitaka Kikkawa
The mesothelium, covered by a continuous monolayer of mesothelial cells, is the first protective barrier against metastatic ovarian cancer. However, mesothelial cells release tumor-promoting factors that accelerate the process of peritoneal metastasis. We identified cancer-associated mesothelial cells (CAMs) that had tumor-promoting potential. Here, we found that plasminogen activator inhibitor-1 (PAI-1) induced the formation of CAMs, after which CAMs increasingly secreted the oncogenic factors interleukin-8 (IL-8) and C-X-C motif chemokine ligand 5 (CXCL5), further promoting the metastasis of ovarian cancer cells in a feedback loop...
October 26, 2018: Cancer Letters
https://www.readbyqxmd.com/read/30417064/a-report-of-bell-s-palsy-triggered-by-leptomeningeal-metastases-from-recurrent-high-grade-serous-ovarian-cancer
#14
Khilen B Patel, Anna Gaidis, Angela Stephens, Thomas Z Thompson, Heather Williams, Bunja Rungruang
•CNS metastases involving leptomeninges (LM) are extremely rare in patients with ovarian cancer.•Prognosis for ovarian cancer patients with LM metastases is very poor and treatment is palliative in nature.•Chemotherapy is administered intrathecally via an Ommaya reservoir or intra-CSF via repeated lumbar punctures.•Early recognition of LM metastases can help maintain the patients' quality of life by minimizing neurological deficits.
November 2018: Gynecologic Oncology Reports
https://www.readbyqxmd.com/read/30410068/induction-of-otud4-by-viral-infection-promotes-antiviral-responses-through-deubiquitinating-and-stabilizing-mavs
#15
Tianzi Liuyu, Keying Yu, Liya Ye, Zhidong Zhang, Man Zhang, Yujie Ren, Zeng Cai, Qiyun Zhu, Dandan Lin, Bo Zhong
The activity and stability of the adapter protein MAVS (also known as VISA, Cardif and IPS-1), which critically mediates cellular antiviral responses, are extensively regulated by ubiquitination. However, the process whereby MAVS is deubiquitinated is unclear. Here, we report that the ovarian tumor family deubiquitinase 4 (OTUD4) targets MAVS for deubiquitination. Viral infection leads to the IRF3/7-dependent upregulation of OTUD4 which interacts with MAVS to remove K48-linked polyubiquitin chains, thereby maintaining MAVS stability and promoting innate antiviral signaling...
November 8, 2018: Cell Research
https://www.readbyqxmd.com/read/30407618/effect-of-body-mass-index-on-the-outcome-of-ivf-cycles-among-patients-with-poor-ovarian-response
#16
Ahmed M Maged, Radwa M Fahmy, Hamsa Rashwan, Maryam Mahmood, Sarah M Hassan, Hala Nabil, Ayman Hany, Rehab Lotfy, Yossra S Lasheen, Sherif Dahab, Mohamed Darwish
OBJECTIVE: To assess the effects of body mass index (BMI) on the outcome of IVF cycles among poor responders. METHODS: A prospective cohort study in Egypt enrolled 185 poor responders who underwent intracytoplasmic sperm injection via an antagonist protocol between 2012 and 2017. Participants were classified into three groups by BMI (calculated as weight in kilograms divided by the square of height in meters): 18.5-24.9 (normal, n=48); 25-29.9 (overweight, n=54); 30 or higher (obese, n=83)...
November 8, 2018: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/30403656/androgen-excess-in-breast-cancer-development-implications-for-prevention-and-treatment
#17
REVIEW
Giorgio Secreto, Alessandro Girombelli, Vittorio Krogh
The aim of this review is to highlight the pivotal role of androgen excess in the development of breast cancer. Available evidence suggests that testosterone controls breast epithelial growth through a balanced interaction between its two active metabolites: cell proliferation is promoted by estradiol while it is inhibited by dihydrotestosterone. A chronic overproduction of testosterone (e.g. ovarian stromal hyperplasia) results in an increased estrogen production and cell proliferation that are no longer counterbalanced by dihydrotestosterone...
November 1, 2018: Endocrine-related Cancer
https://www.readbyqxmd.com/read/30396566/oocyte-donation-insights-gleaned-and-future-challenges
#18
REVIEW
Alexis P Melnick, Zev Rosenwaks
With the first successful report of an IVF pregnancy achieved via donor oocytes in 1984, the applications of assisted reproductive technology (ART) were further expanded to include women unable to conceive with their own oocytes. Today, oocyte donation makes up an increasingly large percentage of all ART cycles worldwide. Oocyte donation presents several unique challenges to clinicians as two separate interests, those of the donor and those of the recipient, must be represented. These challenges include successful preparation of the endometrium in donor oocyte recipients, the synchronization of donor/recipient cycles, and the optimization of ovarian stimulation while maximizing donor safety...
November 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/30390764/early-detection-of-ovarian-cancer
#19
REVIEW
Kevin M Elias, Jing Guo, Robert C Bast
Early detection of ovarian cancer could reduce mortality by 10% to 30%. Effective screening requires high sensitivity (>75%) and extremely high specificity (99.7%). Clinical trials suggest the best specificity is achieved with 2-stage strategies in which increasing serum CA125 level triggers transvaginal sonography to detect a malignant pelvic mass, although evidence for such approaches improving overall survival has been limited. Screening may be improved by combining CA125 with novel biomarkers, such as autoantibodies, circulating tumor DNA, or microRNAs...
December 2018: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/30390443/neuroticism-modulates-mood-responses-to-pharmacological-sex-hormone-manipulation-in-healthy-women
#20
D S Stenbæk, E Budtz-Jørgensen, A Pinborg, P S Jensen, V G Frokjaer
BACKGROUND: Women show increased risk of depressive symptoms during hormonal transition phases. The risk mechanisms may include changes in mood in response to fluctuating ovarian hormones moderated by predisposing risk factors for mood disorders, such as personality trait Neuroticism. METHODS: A pooled sample of 92 mentally healthy women (28.3 ± 7.1, mean age ± SD) from two independent cohorts run in our lab, using gonadotropin-releasing hormone agonist (GnRHa) experimentally (n = 28) compared to placebo (n = 27) and as part in vitro fertilization (n = 37), were extracted from the Center for Integrated Molecular Brain Imaging database...
October 26, 2018: Psychoneuroendocrinology
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