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https://www.readbyqxmd.com/read/27910071/pi3k-pten-akt-genetic-mouse-models-of-endometrial-carcinoma
#1
Ayesha Joshi, Lora Hedrick Ellenson
The PI3K/PTEN/AKT pathway is the most frequently mutated pathway in endometrial carcinoma. Mouse models are invaluable tools to understand, at the molecular level, the contributions of components of this pathway towards initiation and progression of endometrial carcinoma. This chapter summarizes results of germline and tissue specific knockout mouse models generated to understand how mutations in components of this pathway lead to development of carcinoma and its interactions with other frequently altered pathways like mismatch repair and estrogen signaling...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27910070/mig-6-mouse-model-of-endometrial-cancer
#2
Tae Hoon Kim, Jung-Yoon Yoo, Jae-Wook Jeong
Endometrial cancer is a frequently occurring gynecological disorder. Estrogen-dependent endometrioid carcinoma is the most common type of gynecological cancer. One of the major pathologic phenomena of endometrial cancer is the loss of estrogen (E2) and progesterone (P4) control over uterine epithelial cell proliferation. P4 antagonizes the growth-promoting properties of E2 in the uterus. P4 prevents the development of endometrial cancer associated with unopposed E2 by blocking E2 actions. Mitogen inducible gene 6 (Mig-6, Errfi1, RALT, or gene 33) is an immediate early response gene that can be induced by various mitogens and common chronic stress stimuli...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27910065/pathology-of-endometrial-carcinoma
#3
Sigurd F Lax
On a clinicopathological and molecular level, two distinctive types of endometrial carcinoma, type I and type II, can be distinguished. Endometrioid carcinoma, the typical type I carcinoma, seems to develop through an estrogen-driven "adenoma carcinoma" pathway from atypical endometrial hyperplasia/endometrioid intraepithelial neoplasia (AEH/EIN). It is associated with elevated serum estrogen and high body mass index and expresses estrogen and progesterone receptors. They are mostly low grade and show a favorable prognosis...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27902476/stromal-p16-expression-is-significantly-increased-in-endometrial-carcinoma
#4
Gun Yoon, Chang Won Koh, Nara Yoon, Ji-Ye Kim, Hyun-Soo Kim
p16 is a negative regulator of cell proliferation and is considered a tumor suppressor protein. Alterations in p16 protein expression are associated with tumor development and progression. However, the p16 expression status in the peritumoral stroma has not been investigated in the endometrium. Therefore, we evaluated stromal p16 expression in different types of endometrial lesions using immunohistochemistry. Differences in the p16 expression status according to the degree of malignancy and histological type were analyzed...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27901412/oral-progestogens-versus-levonorgestrel-releasing-intrauterine-system-for-treatment-of-endometrial-intraepithelial-neoplasia
#5
Mary L Marnach, Kristina A Butler, Michael R Henry, Catherine E Hutz, Carrie L Langstraat, Christine M Lohse, Petra M Casey
BACKGROUND: Limited therapeutic guidelines exist regarding medical therapy, ideal dosing, duration of therapy, or recommendations for timing of endometrial reassessment for women with endometrial intraepithelial neoplasia (EIN) who desire fertility preservation or who are not optimal surgical candidates. We aimed to determine the effectiveness of oral progestogens (OP) versus the levonorgestrel-releasing intrauterine system (LNG IUS) in the medical treatment of EIN. METHODS: We retrospectively identified women with EIN at our institution from 2007 through 2014 and compared the outcomes of those treated with OP versus LNG IUS...
November 30, 2016: Journal of Women's Health
https://www.readbyqxmd.com/read/27896507/levonorgestrel-releasing-intrauterine-systems-versus-oral-cyclic-medroxyprogesterone-acetate-in-endometrial-hyperplasia-therapy-a-meta-analysis
#6
Jin-Sung Yuk, Jae Yen Song, Jung Hun Lee, Won I Park, Hyeong Sik Ahn, Hyun Jung Kim
BACKGROUND: This study aimed to compare the levonorgestrel-releasing intrauterine system (LNG-IUS) with oral cyclic medroxyprogesterone acetate (MPA) in endometrial hyperplasia therapy using randomized controlled trials (RCTs). METHODS: The study searched MEDLINE, EMBASE, CENTRAL, and other databases. All regression outcomes were calculated for dichotomous outcomes in terms of relative risk (RR) and 95% confidence intervals (CIs) using a Mantel-Haenszel random effects model...
November 28, 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/27895728/quantitative-contrast-enhanced-ultrasonography-for-the-differential-diagnosis-of-endometrial-hyperplasia-and-endometrial-neoplasms
#7
Ying Liu, Yi Xu, Wen Cheng, Xinghan Liu
The present study aimed to investigate the feasibility of applying contrast-enhanced ultrasonography (CEUS) imaging technology for distinguishing between benign and malignant endometrial lesions, and to screen markers that could be correlated with the pathological results. In this study, endometrial diseases were diagnosed by biopsy under hysteroscopy and CEUS examinations. The intensity and time parameters of the time-intensity curve (TIC) were analyzed. The mean arrival time (AT), time-to-peak (TTP), rise time (RT), washout half-time and clearance half-time of malignant lesions were shorter than those of benign lesions (P<0...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27889612/tet1-gper-pi3k-akt-pathway-is-involved-in-insulin-driven-endometrial-cancer-cell-proliferation
#8
Bing-Ying Xie, Qiao-Ying Lv, Cheng-Cheng Ning, Bing-Yi Yang, Wei-Wei Shan, Ya-Li Cheng, Chao Gu, Xue-Zhen Luo, Zhen-Bo Zhang, Xiao-Jun Chen, Xiao-Wei Xi, You-Ji Feng
Large amount of clinical evidence has demonstrated that insulin resistance is closely related to oncogenesis of endometrial cancer (EC). Despite recent studies showed the up-regulatory role of insulin in G protein-coupled estrogen receptor (GPER/GPR30) expression, GPER expression was not decreased compared to control when insulin receptor was blocked even in insulin treatment. The purpose of this study was to explore the possible mechanism by which insulin up-regulates GPER that drives EC cell proliferation...
November 23, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27884207/potential-contribution-of-the-uterine-microbiome-in-the-development-of-endometrial-cancer
#9
Marina R S Walther-António, Jun Chen, Francesco Multinu, Alexis Hokenstad, Tammy J Distad, E Heidi Cheek, Gary L Keeney, Douglas J Creedon, Heidi Nelson, Andrea Mariani, Nicholas Chia
BACKGROUND: Endometrial cancer studies have led to a number of well-defined but mechanistically unconnected genetic and environmental risk factors. One of the emerging modulators between environmental triggers and genetic expression is the microbiome. We set out to inquire about the composition of the uterine microbiome and its putative role in endometrial cancer. METHODS: We undertook a study of the microbiome in samples taken from different locations along the female reproductive tract in patients with endometrial cancer (n = 17), patients with endometrial hyperplasia (endometrial cancer precursor, n = 4), and patients afflicted with benign uterine conditions (n = 10)...
November 25, 2016: Genome Medicine
https://www.readbyqxmd.com/read/27879454/molecular-mechanisms-of-androstenediol-in-the-regulation-of-the-proliferative-process-of-human-endometrial-cells
#10
Francisca Plaza-Parrochia, Lorena Oróstica, Paula García, Carolina Vera, Carmen Romero, Luis Valladares, Margarita Vega
Proliferation in endometria of women with polycystic ovarian syndrome (PCOS) is increased, similar to the biosynthesis of androstenediol (estrogenic metabolite). As previously shown, in human endometrial cells, androstenediol increases CYCLIN D1 levels and KI67 and decreases P27 content. The objective of the present investigation was to determine the mechanisms by which androstenediol promotes endometrial cell-cycle progression. Estrogen receptor α (ERα) activation and changes in CYCLIN D1 and P27 levels were evaluated by Western blot in T-HESC and St-T1b endometrial cell lines, using receptor antagonists; activation of PI3K-protein kinase B (AKT) and mitogen-activated protein kinases-extracellular signal-regulated kinases (MAPK-ERK)1/2 pathways was evaluated using PI3K, MAPK/ERK kinase (MEK)1/2, and RNA-polymerase II inhibitors...
November 21, 2016: Reproductive Sciences
https://www.readbyqxmd.com/read/27859783/practical-usefulness-of-atypical-endometrial-cell-categories-within-the-new-classification-of-endometrial-cytology-when-applied-to-conventional-smears
#11
S Munakata, S Sasaki, M Takase, R Okatake, Y Suzuki, T Yamamoto, K Yanoh
OBJECTIVE: Endometrial cytology has been widely used as a screening tool in Japan. Traditionally, a three-tier reporting system, consisting of 'negative', 'suspicious' and 'positive' categories, has been used. However, a more descriptive system, the New Terminology in Endometrial Cytology (NTEMC), which is based on the Bethesda System for uterine cervical cytology, was introduced recently. The objective of this study was to validate the NTEMC criteria. METHODS: Endometrial cytology specimens that had been categorised as 'suspicious' were collected in our hospital between 2003 and 2013, and from these, 106 specimens with corresponding histological results, were re-evaluated according to the NTEMC criteria...
November 17, 2016: Cytopathology: Official Journal of the British Society for Clinical Cytology
https://www.readbyqxmd.com/read/27834005/figo-stage-iiic-endometrial-cancer-identification-among-patients-with-complex-atypical-hyperplasia-grade-1-and-2-endometrioid-endometrial-cancer-laparoscopic-indocyanine-green-sentinel-lymph-node-mapping-versus-frozen-section-of-the-uterus-why-get-around-the
#12
Andrea Papadia, Maria Luisa Gasparri, Franziska Siegenthaler, Sara Imboden, Stefan Mohr, Michael D Mueller
PURPOSE: To compare two surgical strategies used to identify lymph node metastases in patients with preoperative diagnosis of complex atypical hyperplasia (CAH), grade 1 and 2 endometrial cancer (EC). METHODS: Data on patients with preoperative diagnosis of CAH, grade 1 and 2 EC undergoing laparoscopic indocyanine green (ICG) sentinel lymph node (SLN) mapping followed by frozen section of the uterus were collected. When risk factors were identified at frozen section, patients were subjected to a systematic lymphadenectomy...
November 11, 2016: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/27829198/role-of-diffusion-weighted-mri-in-the-differential-diagnosis-of-endometrial-cancer-polyp-hyperplasia-and-physiological-thickening
#13
Baris Bakir, Sükrü Sanli, Vuslat Lale Bakir, Selcuk Ayas, Sevda Ozel Yildiz, Ahmet Cem Iyibozkurt, Merve Gülbiz Kartal, Ekrem Yavuz
Our purpose was to evaluate the role of diffusion-weighted imaging (DWI) in the diagnosis of various common pathologies of the uterine cavity, by comparing them with contrast-enhanced MRI findings. One hundred sixty-four patients with lesions in endometrial cavity were included in the study. The patients were grouped in four (one malignant and three benign groups). We have observed that the differences of the apparent diffusion coefficient, b1000q, and Cq values between various common benign and malignant lesions were statistically significant (P<...
October 20, 2016: Clinical Imaging
https://www.readbyqxmd.com/read/27827907/pueraria-mirifica-exerts-estrogenic-effects-in-the-mammary-gland-and-uterus-and-promotes-mammary-carcinogenesis-in-donryu-rats
#14
Anna Kakehashi, Midori Yoshida, Yoshiyuki Tago, Naomi Ishii, Takahiro Okuno, Min Gi, Hideki Wanibuchi
Pueraria mirifica (PM), a plant whose dried and powdered tuberous roots are now widely used in rejuvenating preparations to promote youthfulness in both men and women, may have major estrogenic influence. In this study, we investigated modifying effects of PM at various doses on mammary and endometrial carcinogenesis in female Donryu rats. Firstly, PM administered to ovariectomized animals at doses of 0.03%, 0.3%, and 3% in a phytoestrogen-low diet for 2 weeks caused significant increase in uterus weight. Secondly, a 4 week PM application to non-operated rats at a dose of 3% after 7,12-dimethylbenz[a]anthracene (DMBA) initiation resulted in significant elevation of cell proliferation in the mammary glands...
November 4, 2016: Toxins
https://www.readbyqxmd.com/read/27818130/structured-imaging-technique-in-the-gynecologic-office-for-the-diagnosis-of-abnormal-uterine-bleeding
#15
REVIEW
Margit Dueholm, Ina Marie D Hjorth
: The aim in the diagnosis of abnormal uterine bleeding (AUB) is to identify the bleeding cause, which can be classified by the PALM-COEIN (Polyp, Adenomyosis, Leiomyoma, Malignancy (and hyperplasia), Coagulopathy, Ovulatory disorders, Endometrial, Iatrogenic and Not otherwise classified) classification system. In a gynecologic setting, the first step is most often to identify structural abnormalities (PALM causes). Common diagnostic options for the identification of the PALM include ultrasonography, endometrial sampling, and hysteroscopy...
October 1, 2016: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27801761/endometrial-thickness-as-measured-by-transvaginal-ultrasound-and-the-corresponding-histopathologic-diagnosis-in-women-with-postmenopausal-bleeding
#16
Vatsal Patel, Edward J Wilkinson, Srikar Chamalan, Xiaomin Lu, Jacqueline Costagno, Demaretta Rush
Endometrial thickness as measured by transvaginal ultrasound (TVUS) is being increasingly used as a first-line method to evaluate patients with vaginal bleeding. Our study aims to examine correlation between the histopathologic diagnosis and the results of TVUS and find a threshold that could reliably exclude carcinoma. We included women, age 55 years and above, who presented with postmenopausal bleeding and had a TVUS within 30 days of their endometrial biopsy. Total of 304 patients met our criteria and were divided into 4 groups...
October 31, 2016: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/27784637/screening-and-verifying-endometrial-carcinoma-diagnostic-biomarkers-based-on-a-urine-metabolomic-profiling-study-using-uplc-q-tof-ms
#17
Xidong Shao, Ke Wang, Xinyu Liu, Caiyun Gu, Pengjie Zhang, Jiabin Xie, Wenxin Liu, Lu Sun, Tong Chen, Yubo Li
BACKGROUND: Endometrial carcinoma (EOC) is a gynecological disease with one of the highest worldwide incidences. Due to the lack of typical clinical symptoms and limited sensitive screening methods used to diagnose endometrial carcinoma, the disease is easily neglected before patients are aware of its presence. Therefore, EOC results in serious impacts on women's lives and health. We screened diagnostic biomarkers of EOC with a noninvasive method that compared healthy individuals and endometrial hyperplasia (EOH) patients...
October 23, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/27773356/polycystic-ovary-syndrome-and-endometrial-hyperplasia-an-overview-of-the-role-of-bariatric-surgery-in-female-fertility
#18
Vasileios Charalampakis, Abd A Tahrani, Ahmed Helmy, Janesh K Gupta, Rishi Singhal
One of the most effective methods to tackle obesity and its related comorbidities is bariatric surgery. Polycystic ovary syndrome (PCOS) and endometrial hyperplasia (EH), which are associated with increased risk of endometrial carcinoma, have been identified as potentially new indications for bariatric surgery. PCOS is the most common endocrine disorder in women in the reproductive age and is associated with several components of the metabolic syndrome such as obesity, insulin resistance and hypertension. EH is a pre-cancerous condition which arises in the presence of chronic exposure to estrogen unopposed by progesterone such as both in PCOS and obesity...
October 17, 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/27771165/endoplasmic-reticulum-stress-in-complex-atypical-hyperplasia-as-a-possible-predictor-of-occult-carcinoma-and-progestin-response
#19
Katherine E Tierney, Lingyun Ji, Shannon S Dralla, Eunjeong Yoo, Annie Yessaian, Huyen Q Pham, Lynda Roman, Richard Sposto, Paulette Mhawech-Fauceglia, Yvonne G Lin
: Glucose-regulated protein (GRP)-78, the key regulator of endoplasmic reticulum (ER) stress, is associated with endometrial cancer (EC) development and progression. However, its role in the continuum from complex atypical hyperplasia (CAH) to EC is unknown and the focus of this study. METHODS: 252 formalin-fixed, paraffin-embedded endometrial biopsies from patients with CAH diagnosed between 2003 and 2011 were evaluated for GRP78 expression by immunohistochemistry...
December 2016: Gynecologic Oncology
https://www.readbyqxmd.com/read/27769088/accuracy-of-transvaginal-ultrasonography-hysteroscopy-and-uterine-curettage-in-evaluating-endometrial-pathologies
#20
Miriam da Silva Wanderley, Miriam Monteiro Álvares, Maria de Fátima Brito Vogt, Lizandra Moura Paravidine Sazaki
Objective To evaluate the accuracy of transvaginal ultrasonography, hysteroscopy and uterine curettage in the diagnosis of endometrial polyp, submucous myoma and endometrial hyperplasia, using as gold standard the histopathological analysis of biopsy samples obtained during hysteroscopy or uterine curettage. Methods Cross-sectional study performed at the Hospital Universitário de Brasília (HUB). Data were obtained from the charts of patients submitted to hysteroscopy or uterine curettage in the period from July 2007 to July 2012...
October 2016: Revista Brasileira de Ginecologia e Obstetrícia
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