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https://www.readbyqxmd.com/read/27912078/mouse-double-minute-2-homolog-actively-suppresses-p53-activity-in-oocytes-during-mouse-folliculogenesis
#1
Chen-Xi Zhang, Qin Zhang, Yin-Yin Xie, Xue-Yan He, Cong Xiang, Xiao-Shuang Hou, Ying Zhou, Lai Chen, Guo-Xin Zhang, Geng Liu
The p53 signaling network is indispensible in cellular stress responses and tumor suppression. Negative regulations of p53 by mouse double minute 2 and 4 homologs (MDM2) and (MDM4) are an integrated component of the network and have been implicated in regulating the stress responses and the maintenance of normal development and homeostasis of multiple somatic cell lineages. However, the regulatory role of MDM2 on p53 and stress responses in female germ cells remains undetermined. Here, we used the Cre-loxP system to delete Mdm2 in oocytes at different stages of folliculogenesis in mice...
November 29, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27869447/-testing-of-mutations-in-brca1-and-brca2-genes-in-tumor-tissues-possibilities-and-limitations
#2
Hana Vošmiková, Aleš Ryška, Kateřina Sieglová, Jan Laco
Development of targeted cancer therapy is accompanied by a search for markers allowing prediction of response to the particular treatment. Recently, the interest is focused, among other neoplasms, also on the therapy of ovarian cancer using new inhibitors of poly (ADP-ribose) polymerase (PARP) proteins, nuclear enzymes involved in the repair of single-stranded DNA breaks. The greatest benefit from the administration of PARP inhibitors have patients with a deleterious or potentially deleterious germ-line or somatic mutation of BRCA1 or BRCA2, two genes responsible for repair of double stranded DNA breaks...
2016: Ceskoslovenská Patologie
https://www.readbyqxmd.com/read/27818263/brief-report-a-second-primary-endodermal-sinus-tumor-nine-years-after-initial-diagnosis
#3
Lea A Moukarzel, Kimberly Levinson, Francis C Grumbine
BACKGROUND: Ovarian yolk sac tumors (YST) are rare malignant germ cell tumors known to present unilaterally, allowing for fertility sparing surgical treatment with adjuvant chemotherapy. The few published cases of bilateral ovarian involvement were at the time of original diagnosis in patients with widely metastatic disease. We present this first case of bilateral ovarian YSTs, diagnosed several years apart, and discuss the implications on recurrence and tumor marker surveillance for these tumors...
November 3, 2016: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/27803008/the-role-of-staging-and-adjuvant-chemotherapy-in-stage-i-malignant-ovarian-germ-cell-tumors-mogts-the-mito-9-study
#4
G Mangili, C Sigismondi, D Lorusso, G Cormio, M Candiani, G Scarfone, F Mascilini, A Gadducci, A M Mosconi, P Scollo, C Cassani, S Pignata, G Ferrandina
BACKGROUND: Surgery followed by platinum-based chemotherapy is the standard of care for MOGCTs, except for stage IA dysgerminoma and stage IA grade 1 immature teratoma where surveillance only is recommended. The role of adjuvant chemotherapy and surgical staging is debated. PATIENTS AND METHODS: Data from 144 patients with stage I MOGTs were collected among MITO centers (Multicenter Italian Trials in Ovarian Cancer) and analysed. RESULTS: 55(38...
November 1, 2016: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/27793140/rare-case-of-complete-colon-structure-in-a-mature-cystic-teratoma-of-the-ovary-in-menopausal-woman-a-case-report
#5
Eun Young Ki, Dong Gyu Jang, Dong Jun Jeong, Chang Jin Kim, Sung Jong Lee
BACKGROUND: Mature cystic teratoma (MCT) of the ovary is benign germ cell tumor and shows the highest incidence in women of reproductive age. Histologically, it includes components derived from endoderm, mesoderm, and ectoderm. Although there have been many reports of MCT having small part of the intestinal component, ovarian MCT containing complete colon structure was very rare. CASE PRESENTATION: A 54-year-old woman underwent laparoscopic left salpingo-oophorectomy due to an incidentally found ovarian mass...
October 28, 2016: BMC Women's Health
https://www.readbyqxmd.com/read/27785897/complete-response-to-paclitaxel-ifosfamide-and-cisplatin-therapy-in-a-case-of-ovarian-ependymoma
#6
Makiko Hino, Yusuke Kobayashi, Michiko Wada, Yoshihisa Hattori, Takashi Kurahasi, Hiroyuki Nakagawa
There are many reports on paclitaxel, ifosfamide, and cisplatin (TIP) therapy, following standard bleomycin, etoposide, and cisplatin (BEP) therapy, for salvage treatment of testicular malignant germ cell tumors, but there are no reports on its use for ovarian malignant tumors. We report here that a patient with primary ependymoma of the ovary, who was resistant to BEP therapy, achieved a complete response to a combined therapy, including TIP therapy as the second-line chemotherapy and surgery. This important case, combined with published studies, suggests that TIP therapy is effective for both testicular and ovarian malignant tumors and indicates that TIP therapy can be used as an effective second-line therapy for malignant tumors resistant to BEP therapy...
November 2016: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/27781377/a-variant-c-kit-mutation-d816h-fundamental-to-the-sequential-development-of-an-ovarian-mixed-germ-cell-tumor-and-systemic-mastocytosis-with-cmml
#7
Sarah G Mitchell, Silvia T Bunting, Debra Saxe, Thomas Olson, Frank G Keller
An activating point mutation of the c-KIT tyrosine kinase receptor gene, D816H, has been described in germ cell tumors (GCTs). We report an adolescent diagnosed with an ovarian mixed GCT and systemic mastocytosis with chronic myelomonocytic leukemia (SM-CMML). The teratoma and dysgerminoma differed by copy number aberrations via single nucleotide polymorphism (SNP) microarray, but were inclusive of the same c-KIT D816H point mutation (c.2446G>C) also identified in blood and bone marrow mast cells. These findings indicate not only a clonal origin of the GCT and hematologic malignancy, but also suggest a rare KIT mutation may be playing a fundamental role in malignancy development...
October 26, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27757372/ovarian-mature-cystic-teratoma-with-fistula-formation-into-the-rectum-a-case-report
#8
Yuichiro Kizaki, Tomonori Nagai, Ken Ohara, Yosuke Gomi, Taichi Akahori, Yoshihisa Ono, Shigetaka Matsunaga, Yasushi Takai, Masahiro Saito, Kazunori Baba, Hiroyuki Seki
BACKGROUND: While ovarian mature cystic teratomas are benign ovarian germ-cell tumors and the most common type of all ovarian tumors, the formation of fistulas into surrounding organs such as the bladder and the intestinal tract is extremely rare. This report documents a case of ovarian mature cystic teratoma with a rectal fistula, thought to be caused by local inflammation. CASE DESCRIPTION: A pelvic mass was diagnosed as an ovarian mature cystic teratoma of approximately 10 cm in diameter on transvaginal ultrasound and magnetic resonance examinations...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27704516/prognostic-factors-in-children-with-extracranial-malignant-germ-cell-tumors-a-monocentric-pediatric-tunisian-study
#9
Faten Fedhila, Samar Rhayem, Habiba Hafsi, Wiem Douira, Raoudha Doghri, Monia Khemiri, Karima Mrad, Ibtissem Bellagha, Bechir Zouari, Sihem Barsaoui
Background Extracranial Germ cell tumors (GCT) are a rare and a heterogeneous group of pediatric cancers but highly curable. Aim We aimed to review management, outcome and prognostic factors that influence overall survival (OS) in a pediatric Tunisian oncologic unit. Methods We retrospectively evaluated between January 1998 and December 2012, 33 patients affected by extracranial germ cell tumors and treated according to TGM95 protocol established by the SFOPin a pediatric Tunisian oncologic unit. Results Patients had a mean age of 57 months (ranges: 1 day-13 years)...
April 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/27679143/reproductive-outcomes-after-fertility-sparing-surgery-and-postoperative-adjuvant-chemotherapy-in-ovarian-germ-cell-tumors-and-sex-cord-stromal-tumors
#10
Y Zhang, N Zhang, R Chen, X Lu, K Hua
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/27641463/-high-dose-chemotherapy-as-a-strategy-to-overcome-drug-resistance-in-solid-tumors
#11
Frédéric Selle, Joseph Gligorov, Daniele G Soares, Jean-Pierre Lotz
The concept of high-doses chemotherapy was developed in the 1980s based on in vitro scientific observations. Exposure of tumor cells to increasing concentrations of alkylating agents resulted in increased cell death in a strong dose-response manner. Moreover, the acquired resistance of tumor cells could be overcome by dose intensification. In clinic, dose intensification of alkylating agents resulted in increased therapeutic responses, however associated with significant hematological toxicity. Following the development of autologous stem cells transplantation harvesting from peripheral blood, the high-doses of chemotherapy, initially associated with marked toxic effects, could be more easily tolerated...
September 15, 2016: Bulletin du Cancer
https://www.readbyqxmd.com/read/27595361/germ-cell-tumors-in-adolescents-and-young-adults
#12
Gabriele Calaminus, Jonathan Joffe
Germ cell tumors (GCTs) represent a group of biologically complex malignancies that affect patients at different sites within the body and at different ages. The varying nature of these tumors reflects their cell of origin which is the primordial germ cell, which normally gives rise to ovarian and testicular egg and sperm producing cells. These cells retain an ability to give rise to all types of human tissues, and this is illustrated by the different kinds of GCTs that occur. In adolescent and young adult (AYA) patients, GCTs predominantly present as testicular, ovarian or mediastinal primary GCTs, and represent some of the most complex therapeutic challenges within any AYA practice...
2016: Progress in Tumor Research
https://www.readbyqxmd.com/read/27587625/ovarian-cancer-version-1-2016-nccn-clinical-practice-guidelines-in-oncology
#13
Robert J Morgan, Deborah K Armstrong, Ronald D Alvarez, Jamie N Bakkum-Gamez, Kian Behbakht, Lee-May Chen, Larry Copeland, Marta Ann Crispens, Maria DeRosa, Oliver Dorigo, David M Gershenson, Heidi J Gray, Ardeshir Hakam, Laura J Havrilesky, Carolyn Johnston, Shashikant Lele, Lainie Martin, Ursula A Matulonis, David M O'Malley, Richard T Penson, Sanja Percac-Lima, Mario Pineda, Steven C Plaxe, Matthew A Powell, Elena Ratner, Steven W Remmenga, Peter G Rose, Paul Sabbatini, Joseph T Santoso, Theresa L Werner, Jennifer Burns, Miranda Hughes
This selection from the NCCN Guidelines for Ovarian Cancer focuses on the less common ovarian histopathologies (LCOHs), because new algorithms were added for LCOHs and current algorithms were revised for the 2016 update. The new LCOHs algorithms include clear cell carcinomas, mucinous carcinomas, and grade 1 (low-grade) serous carcinomas/endometrioid epithelial carcinomas. The LCOHs also include carcinosarcomas (malignant mixed Müllerian tumors of the ovary), borderline epithelial tumors (also known as low malignant potential tumors), malignant sex cord-stromal tumors, and malignant germ cell tumors...
September 2016: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/27569583/conundrums-in-the-management-of-malignant-ovarian-germ-cell-tumors-toward-lessening-acute-morbidity-and-late-effects-of-treatment
#14
David M Gershenson, A Lindsay Frazier
One of the most extraordinary stories in the chronicles of gynecologic cancers has been that of malignant ovarian germ cell tumors. Prior to the mid-1960s, most patients died of disease. Fifty years later, most survive. Precisely because high cure rates are achievable, the concentration over the past decade has been on minimizing toxicity and late effects. The present review focuses on five areas of interest related to the management of malignant ovarian germ cell tumors that highlight the different therapeutic strategies practiced by pediatric and gynecologic oncologists: 1) primary surgery, 2) surgery alone (surveillance) for patients with FIGO stage IA disease, 3) postoperative management of FIGO stage IC-III disease, 4) postoperative management of pure immature teratoma, and 5) postoperative management of metastatic pure dysgerminoma...
November 2016: Gynecologic Oncology
https://www.readbyqxmd.com/read/27569298/perspectives-on-testicular-germ-cell-neoplasms
#15
Liang Cheng, Bingjian Lyu, Lawrence M Roth
Our knowledge of testicular germ cell neoplasms has progressed in the last few decades due to the description of germ cell neoplasia in situ (GCNIS) and a variety of specific forms of intratubular germ cell neoplasia, the discovery of isochromosome 12p and its importance in the development of invasiveness in germ cell tumors (GCTs), the identification of specific transcription factors for GCTs, and the recognition that a teratomatous component in mixed GCT represents terminal differentiation. Isochromosome 12p and 12p overrepresentation, collectively referred to as 12p amplification, are fundamental abnormalities that account for many types of malignant GCTs of the testis...
August 25, 2016: Human Pathology
https://www.readbyqxmd.com/read/27484620/ovarian-nongestational-choriocarcinoma-and-associated-adenocarcinoma-with-the-same-germ-cell-origin-determined-by-a-molecular-genetic-approach-a-case-report
#16
Takahiro Koyanagi, Hiroyuki Fujiwara, Hirokazu Usui, Haruko Ariga, Shizuo Machida, Yuji Takei, Yasushi Saga, Makio Shozu, Noriyoshi Fukushima, Toshiro Niki, Shigeki Matsubara, Mitsuaki Suzuki
Ovarian non-gestational choriocarcinomas co-existing with adenocarcinoma are extremely rare and have been reported as epithelial ovarian carcinomas of a "non-germ cell origin" with "choriocarcinomatous differentiation". Although the cellular origin of non-gestational choriocarcinoma may be post-meiotic ovarian germ cells or the dedifferentiation of epithelial ovarian carcinoma, detailed genetic evidence has not yet been obtained to support this. We herein present a case of ovarian non-gestational choriocarcinoma co-existing with adenocarcinoma in a 29-year-old woman...
September 2016: Pathology International
https://www.readbyqxmd.com/read/27474440/loss-of-l-3-mbt-leads-to-acquisition-of-the-ping-pong-cycle-in-drosophila-ovarian-somatic-cells
#17
Tetsutaro Sumiyoshi, Kaoru Sato, Hitomi Yamamoto, Yuka W Iwasaki, Haruhiko Siomi, Mikiko C Siomi
In Drosophila germ cells, PIWI-interacting RNAs (piRNAs) are amplified through a PIWI slicer-dependent feed-forward loop termed the ping-pong cycle, yielding secondary piRNAs. However, the detailed mechanism remains poorly understood, largely because an ex vivo model system amenable to biochemical analyses has not been available. Here, we show that CRISPR-mediated loss of function of lethal (3) malignant brain tumor [l(3)mbt] leads to ectopic activation of the germ-specific ping-pong cycle in ovarian somatic cells...
July 15, 2016: Genes & Development
https://www.readbyqxmd.com/read/27462604/a-case-report-of-a-young-girl-with-mucinous-borderline-tumor-of-the-ovary
#18
Hyun-Mi Lee, Kyeong A So, Mi Kyung Kim, Yoo Kyung Lee, In-Ho Lee, Tae-Jin Kim, Ki Heon Lee
Ovarian tumors are relatively rare in children and adolescent. The incidence of malignancies in these groups is 1% to 1.5%. The common histologic type is non-epithelial type such as germ cell tumors or sex cord-stromal tumors and only 10% to 17% of those are epithelial tumors. It is important to accurately diagnose in the early these rare tumors for proper staging and treatment to save the patient's life and fertility. We present a case of a 13-year-old girl with a giant ovarian mucinous borderline tumor.
July 2016: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/27459524/deep-sequencing-reveals-spatially-distributed-distinct-hot-spot-mutations-in-dicer1-related-multinodular-goiter
#19
Leanne de Kock, Ismaël Bah, Timothée Revil, Pierre Bérubé, Mona K Wu, Nelly Sabbaghian, John R Priest, Jiannis Ragoussis, William D Foulkes
CONTEXT: Nontoxic multinodular goiter (MNG) occurs frequently, but its genetic etiology is not well established. Familial MNG and MNG occurring with ovarian Sertoli-Leydig cell tumor are associated with germline DICER1 mutations. We recently identified second somatic DICER1 ribonuclease (RNase) IIIb mutations in two MNGs. OBJECTIVE: The objective of the study was to investigate the occurrence of somatic DICER1 mutations and mutational clonality in MNG. PATIENTS: MNGs from 15 patients (10 with and five without germline DICER1 mutations) were selected based on tissue availability...
October 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27446585/management-of-bilateral-malignant-ovarian-germ-cell-tumors-experience-of-a-single-institute
#20
Ting Zhao, Yan Liu, Hongyuan Jiang, Hao Zhang, Yuan Lu
Bilateral malignant ovarian germ cell tumors (MOGCTs) are rare. Determination of the optimal treatment modalities is crucial, as these malignancies mainly affect girls and young women who may wish to preserve their fertility. In order to review the prevalence, clinical characteristics, treatment and outcome of bilateral MOGCTs, we performed a retrospective review of patients who were diagnosed with bilateral MOGCTs and underwent primary surgery at the Obstetrics and Gynecology Hospital of Fudan University (Shanghai, China) between January, 2001 and December, 2014...
August 2016: Molecular and Clinical Oncology
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