Spatial local expressions of kisspeptin in the uterus and uterine tubes and its relationship to the reproductive potential in goats.

Kisspeptins are neuropeptides encoded by the Kiss1 gene that was discovered as a metastasis suppressor gene in melanoma and breast cancer. Kisspeptin has pivotal functions for gonadotropin-releasing hormone secretion and plays integrated roles in the hypothalamic-pituitary-gonadal axis. However, little is known about the peripheral expression of kisspeptin in ruminants, especially in the female reproductive tract. Here, the objectives of the current study were to investigate the spatial localization of kisspeptin and mRNA expression of Kiss1 and its receptor (Kiss1r) in the fallopian tubes (FT) and uterus of goats at varied reproductive activity (cyclic versus true anoestrous goats, n=6, each). Specimens of the uterus and FT were collected and fixed using paraformaldehyde to investigate the localizations of kisspeptin in the selected tissues by immunohistochemistry. Another set of samples was snape-frozen to identify the expressions of mRNAs encoding Kiss1 and Kiss1r using real-time PCR. Results revealed immunolocalizations of kisspeptin in the uterus and the FT. The staining of kisspeptin was found mainly in the mucosal epithelium of the uterus the FT, and the endometrial glands. Very intense staining of kisspeptin was found in the uterine and FT specimens in the true anoestrous goats compared to that in cyclic ones. The expression of mRNA encoding Kiss1 gene was significantly higher in the uterine specimen of cyclic goats (1.00±0.09) compared to that in the true anoestrous goats (0.62±0.08) (P ˂0.05), while the expression of mRNA encoding Kiss1r was significantly (P ˂0.001) higher in the uterine tissues of true anoestrous goats (1.78±0.17) compared to that in cyclic ones (1.00±0.11). In conclusion, immunohistochemical localization of kisspeptin and the expression of mRNA encoding Kiss1/Kiss1r revealed spatial changes in the uterus and FT of goats according to the reproductive potential of goats (cyclic versus true anoestrous goats). However, the definitive local role of kisspeptin in the uterus and FT need further investigation.

Immunohistochemical and molecular pattern of p53 in epithelial ovarian cancers negative for germline BRCA1/2 variants.

Epithelial ovarian cancers (EOC) associated with germline or somatic BRCA pathogenetic variants have a significantly higher rate of TP53aberrations. The majority of TP53 mutations are detectable by immunohistochemistry and several studies demonstrated that an abnormal p53 pattern characterized high-grade EOCs. An abnormal p53 immunohistochemical staining in fallopian tube (serous tubal intraepithelial carcinoma (STIC) and "p53 signature" is considered as a precancerous lesion of high-grade EOCs and it is often found in fallopian tube tissues of BRCA germline mutated patients suggesting that STIC is an early lesion and the TP53 mutation is an early driver event of BRCA mutated high-grade EOCs. No relevant data are present in literature about the involvement of p53 abnormal pattern in EOC carcinogenesis of patients negative for germline BRCA variants. We describe TP53 mutation results in relationship to the immunohistochemical pattern of p53 expression in a series of EOCs negative for BRCA1 and BRCA2 germline mutations. In addition, we also investigated STIC presence and "p53 signature" in fallopian tube sampling of these EOCs. Our results demonstrate that TP53 alterations are frequent and early events in sporadic EOCs including also low-grade carcinomas. Also in this series, STIC is associated with an abnormal p53 pattern in fallopian tubes of high-grade EOCs. In summary, TP53 aberrations are the most frequent and early molecular events in EOC carcinogenesis independently from BRCA mutation status.

Development of Decellularized Oviductal Hydrogels as a Support for Rabbit Embryo Culture.

The oviducts (fallopian tubes in mammals) function as the site of fertilization and provide necessary support for early embryonic development, mainly via embryonic exposure to the tubal microenvironment. The main objective of this study was to create an oviduct-specific extracellular matrix (oviECM) hydrogel rich in bioactive components that mimics the native environment, thus optimizing the developmental trajectories of cultured embryos. Rabbit oviducts were decellularized through SDS treatment and enzymatic digestion, and the acellular tissue was converted into oviductal pre-gel extracellular matrix (ECM) solutions. Incubation of these solutions at 37 °C resulted in stable hydrogels with a fibrous structure based on scanning electron microscopy. Histological staining, DNA quantification and colorimetric assays confirmed that the decellularized tissue and hydrogels contained no cellular or nuclear components but retained important components of the ECM, e.g. hyaluronic acid, glycoproteins and collagens. To evaluate the ability of oviECM hydrogels to maintain early embryonic development, two-cell rabbit embryos were cultured on oviECM-coated surfaces and compared to those cultured with standard techniques. Embryo development was similar in both conditions, with 95.9% and 98% of the embryos reaching the late morula/early blastocyst stage by 48 h under standard culture and oviECM conditions, respectively. Metabolomic analysis of culture media in the presence or absence of embryos, however, revealed that the oviECM coating may include signalling molecules and release compounds beneficial to embryo metabolism.

Local sex steroid hormone milieu in the bovine oviduct ipsilateral and contralateral to preovulatory follicle or corpus luteum during the periovulatory phase.

Estradiol-17ß (E2) and progesterone (P4) regulate oviductal functions, providing a suitable environment for the transport and maturation of gametes, fertilization, and embryonic development. In addition to the E2 and P4 nuclear receptors, estrogen receptor (ESR) α and ß, nuclear progesterone receptor (PGR), nongenomic mechanisms through G protein-coupled estrogen receptor (GPER1), and progesterone receptor membrane component (PGRMC) 1 and 2 mediate E2 and P4 actions. This study aimed to characterize the local endocrine environment of the oviduct by examining the oviductal E2 and P4 concentrations and their receptors' mRNA expression during the periovulatory phase. The bovine oviducts were collected in a slaughterhouse and the days postovulation were estimated according to state of the ovaries and the uterus. Samples of the ampulla and isthmus ipsilateral and contralateral to the preovulatory follicle or corpus luteum were collected on Days 19 to 21, Days 0 to 1, Days 2 to 4, and Days 5 to 7 of the estrous cycle. The effects of the estrous cycle phase and oviductal region (ampulla and isthmus) and side (ipsilateral and contralateral) were analyzed by 3-way ANOVA. Moreover, to clarify the regulatory mechanisms of the mRNA expression of hormone receptors, the effects of E2 and P4 on mRNA expression in the oviduct were examined by multiple linear regression. The oviductal endocrine milieu on Days 19 to 21 was characterized by an E2-dominant environment with high E2 and low P4, high ESR1 and PGR mRNA expression, and low ESR2, GPER1, and PGRMC2 mRNA expression, whereas the corresponding on Days 0 to 1 was characterized by the endocrine milieu without hormone dominance. The environment on Days 2 to 4 and Day 5 to 7 was characterized by opposite tendency of oviductal hormone concentrations and their receptors' mRNA expression to Days 19 to 21. Additionally, the ipsilateral oviduct had the more P4-dominant endocrine milieu, with lower E2 and higher P4 concentrations, and different expression of ESR1/2, GPER1, PGR, and PGRMC2 mRNA when compared with the contralateral oviduct on Days 2 to 4 and Days 5 to 7, except for PGRMC1. Although oviductal E2 and P4 influenced the mRNA expression of ESR1/2, GPER1, PGR, and PGRMC1/2, their effects were different between regions and sides. In summary, the oviductal endocrine milieu varies according to the estrous cycle phase and the oviductal region and side, which may be involved in the estrous cycle phase-specific and oviductal region-specific and side-specific functions.

Anti-Müllerian hormone receptor type 2 (AMHR2) expression in bovine oviducts and endometria: comparison of AMHR2 mRNA and protein abundance between old Holstein and young and old Wagyu females.

Anti-Müllerian hormone (AMH) is a glycoprotein produced by granulosa cells of preantral and small antral follicles that has multiple important roles in the ovaries. Recent studies have revealed extragonadal AMH regulation of gonadotrophin secretion from bovine gonadotrophs. In this study we investigated whether the primary receptor for AMH, AMH receptor type 2 (AMHR2), is expressed in bovine oviducts and endometria. Reverse transcription-polymerase chain reaction detected expression of AMHR2 mRNA in oviductal and endometrial specimens. Western blotting and immunohistochemistry were performed to analyse AMHR2 protein expression using anti-bovine AMHR2 antibody. Immunohistochemistry revealed robust AMHR2 expression in the tunica mucosa of the ampulla and isthmus, as well as in the glandular and luminal epithelium of the endometrium. AMHR2 mRNA (measured by real-time polymerase chain reaction) and AMHR2 protein expression in these layers did not significantly differ among oestrous phases in adult Wagyu cows (P>0.1). In addition, AMHR2 mRNA and protein expression in these layers did not differ among old Holsteins (mean (±s.e.m.) age 91.9±6.4 months) and young (26.6±0.8 months) and old (98.8±10.2 months) Wagyu cows. Therefore, AMHR2 is expressed in bovine oviducts and endometria.

Defining fallopian tube-derived miRNA cancer signatures.

BACKGROUND: MicroRNAs have recently emerged as promising circulating biomarkers in diverse cancer types, including ovarian cancer. We utilized conditional, doxycycline-induced fallopian tube (FT)-derived cancer models to identify changes in miRNA expression in tumors and plasma, and further validated the murine findings in high-grade ovarian cancer patient samples. METHODS: We analyzed 566 biologically informative miRNAs in doxycycline-induced FT and metastatic tumors as well as plasma samples derived from murine models bearing inactivation of Brca, Tp53, and Pten genes. We identified miRNAs that showed a consistent pattern of dysregulated expression and validated our results in human patient serum samples. RESULTS: We identified six miRNAs that were significantly dysregulated in doxycycline-induced FTs (P < .05) and 130 miRNAs differentially regulated in metastases compared to normal fallopian tissues (P < .05). Furthermore, we validated miR-21a-5p, miR-146a-5p, and miR-126a-3p as dysregulated in both murine doxycycline-induced FT and metastatic tumors, as well as in murine plasma and patient serum samples. CONCLUSIONS: In summary, we identified changes in miRNA expression that potentially accompany tumor development in murine models driven by commonly found genetic alterations in cancer patients. Further studies are required to test both the function of these miRNAs in driving the disease and their utility as potential biomarkers for diagnosis and/or disease progression.

Identification of Rabbit Oviductal Fluid Proteins Involved in Pre-Fertilization Processes by Quantitative Proteomics.

Oviductal fluid (ODF) proteins modulate and support reproductive processes in the oviduct. In the present study, proteins involved in the biological events that precede fertilization have been identified in the rabbit ODF proteome, isolated from the ampulla and isthmus of the oviduct at different time points within 8 h after intrauterine insemination. A workflow is used that integrates lectin affinity capture with stable-isotope dimethyl labeling prior to nanoLC-MS/MS analysis. In total, over 400 ODF proteins, including 214 lectin enriched glycoproteins, are identified and quantified. Selected data are validated by Western blot analysis. Spatiotemporal alterations in the abundance of ODF proteins in response to insemination are detected by global analysis. A subset of 63 potentially biologically relevant ODF proteins is identified, including extracellular matrix components, chaperones, oxidoreductases, and immunity proteins. Functional enrichment analysis reveals an altered peptidase regulator activity upon insemination. In addition to protein identification and abundance changes, N-glycopeptide analysis further identifies 281 glycosites on 199 proteins. Taken together, these results show, for the first time, the evolving oviductal milieu early upon insemination. The identified proteins are likely those that modulate in vitro processes, including spermatozoa function.

Distribution of extracellular matrix molecules in human uterine tubes during the menstrual cycle: a histological and immunohistochemical analysis.

The uterine tube (UT) is an important and complex organ of the women's reproductive system. In general, the anatomy and basic histology of this organ are well-known. However, the composition and function of the extracellular matrix (ECM) of the UT is still poorly understood. The ECM is a complex supramolecular material produced by cells which is commonly restricted to the basement membrane and interstitial spaces. ECM molecules play not only a structural role, they are also important for cell growth, survival and differentiation in all tissues. In this context, the aim of this study was to evaluate the deposition and distribution of type I and III collagens and proteoglycans (decorin, biglycan, fibromodulin and versican) in human UT during the follicular and luteal phases by using histochemical and immunohistochemical techniques. Our results showed a broad synthesis of collagens (I and III) in the stroma of the UT. The analysis by regions showed, in the mucosa, a specific distribution of versican and fibromodulin in the epithelial surface, whereas decorin and fibromodulin were observed in the lamina propria. Versican and decorin were found in the stroma of the muscular layer, whereas all studied proteoglycans were identified in the serosa. Curiously, biglycan was restricted to the wall of the blood vessels of the serosa and muscular layers. Furthermore, there was an immunoreaction for collagens, decorin, versican and fibromodulin in the UT peripheral nerves. The differential distribution of these ECM molecules in the different layers of the UT could be related to specific structural and/or biomechanical functions needed for the oviductal transport, successful fertilization and early embryogenesis. However, further molecular studies under physiological and pathological conditions are still needed to elucidate the specific role of each molecule in the human UT.

Fallopian Tube Mucosal Involvement in Cervical Gastric-type Adenocarcinomas: Report of a Series With Discussion of the Distinction From Synchronous In Situ Tubal Lesions.

Cervical gastric-type adenocarcinomas are aggressive non-human papillomavirus-related carcinomas with a propensity for extracervical spread, including unusual sites such as the omentum, peritoneum, and ovary. We report 7 cases of cervical gastric-type adenocarcinoma with fallopian tube involvement predominantly in the form of mucosal colonization without underlying invasion. As far as we are aware, this has not been previously described and this report adds to the literature regarding metastatic neoplasms, which may exhibit tubal mucosal involvement and mimic an in situ lesion at this site. In all cases, there was associated ovarian involvement and in 6 of 7 cases, there was endometrial colonization. We speculate that the fallopian tube (and ovarian) involvement is secondary to transuterine spread. Given the occasional occurrence of multifocal gastric-type glandular lesions (benign or malignant) involving different sites in the female genital tract, we discuss the distinction between synchronous independent and metastatic lesions.

[Morphologic features of fallopian tubal epithelium in pelvic high-grade serous carcinoma].

Objective: To study the pathologic features of fallopian tubal epithelium in patients with pelvic high-grade serous carcinoma (HGSC), to investigate its role in pelvic serous carcinogenesis and to reclassify the primary site of HGSC based on recently proposed criteria. Methods: The fallopian tubes in 58 cases of pelvic HGSC (54 cases of ovarian primary, 3 cases of tubal primary, 1 case of peritoneum) and 25 cases of pelvic non-HGSC (5 cases of ovarian low-grade serous cancer, 9 cases of endometrioid cancer, and 11 cases of clear cell ovary carcinoma) were collected from June 2015 to December 2016, and serially examined under light microscope (SEE-FIM protocol). Immunostaining for p53 and Ki-67 was performed to evaluate the presence of p53 signature, serous tubal intraepithelial lesion (STIL), serous tubal intraepithelial carcinoma (STIC) and invasive carcinoma in these fallopian tubes. Meanwhile, primary site of HGSC based on the recently proposed diagnostic criteria were also reclassified. Results: Among the study group, the frequencies of p53 signature, STIL, STIC and invasive HGSC were 27.6% (16/58), 43.1% (25/58), 36.2% (21/58) and 67.2% (39/58), respectively, while in control group, the proportions were 24.0% (6/25), 0, 0 and 8.0% (2/25), respectively. The continuum of epithelial changes in the process of serous neoplasia including p53 signature, STIL, STIC and invasive carcinoma was identified in 8 cases of pelvic HGSC. The proportions of STIL, STIC and invasive carcinomas in HGSC group were higher than that in non-HGSC group (P<0.01). About 80.0% (20/25) of STIL and 85.7% (18/21) of STIC were present unilaterally. Diagnostically, the study group contained the 17 cases of ovarian HGSC, 40 cases of tubal HGSC, and 1 case of peritoneal HGSC after reclassification of the cancer primary. Conclusions: Continuous changes of tubal epithelium including p53 signature, STIL, STIC and invasive carcinomas are identified in patients with HGSC, supporting the current understanding that the fallopian tube is likely the cellular source of the majority HGSC. STIL and STIC may be specific to pelvic HGSC and may act as a target for future research on the early detection and prevention of this disease. The newly proposed diagnostic criteria for pelvic HGSC will lead us to more accurate classification of cancer primary sites. Correct classification of HGSC may have potential impacts for cancer prevention and improve our understanding of ovarian serous carcinogenesis.

Expression of the vascular endothelial growth factor system (VEGF) in the porcine oviduct during the estrous cycle.

The expression and localization of VEGFA and its main receptors Flt-1 and KDR is characterized in the oviduct throughout the porcine estrous cycle. Oviducts were sampled from sows at early follicular, late follicular, early luteal and late luteal stages of the estrous cycle and a segment from the mid portion of the ampulla and isthmus studied by real time RT-PCR and quantitative immunohistochemistry. The expression of the three components of the VEGF system was continuous, although differences were observed depending on the oviduct portion, the stage of the estrous cycle and the histological layer. VEGFA and KDR mRNA expressions were higher in ampulla, while Flt-1 mRNA was higher in isthmus. VEGFA protein was also higher in ampulla but Flt-1 and KDR did not show regional differences between ampulla and isthmus. While the mRNA expression of VEGFA, Flt-1 and KDR increased progressively during the luteal period, the amount of VEGFA and Flt-1 protein decreased in the same period (in isthmus only). Contrastinly, KDR protein peaked in ampulla and isthmus just before ovulation. The VEGF system was majorly located in both the secretory and ciliated cells of the oviduct epithelium, but also in the endothelium and fibroblasts of the lamina propia and the muscle fibres and vessels of the tunica muscularis. Our results are consistent with a participation of VEFG in the regulation of the dynamics of oviductal fluid secretion and the oviduct contractibility.

Decreased Toll-like receptor-2 messenger ribonucleic acid and increased Toll-like receptor-4 in the tubal epithelium next to the infiltrated trophoblasts during tubal pregnancy.

OBJECTIVE: To explore the expression patterns of Toll-like receptor (TLR)2 and TLR4 in the tubal epithelial cells next to the infiltrated trophoblasts at the maternal-fetal interface during tubal pregnancy. DESIGN: Prospective, observational study. SETTING: University-based obstetrics and gynecology hospital. PATIENT(S): Thirty-seven women undergoing salpingectomy for tubal ampullary pregnancy and nine nonpregnant patients with benign uterine or appendix disease. INTERVENTION(S): Oviduct tissues with ectopic gestations were separated into implantation site (group 1) and nonimplantation site (group 2). Tissues from ampullary fallopian tubes during mid-secretory phase (group 3) were collected as the control group. Immunohistochemistry and quantitative real-time polymerase chain reaction were performed. MAIN OUTCOME MEASURE(S): Differences of TLR2 and TLR4 expression patterns between group 1 and group 2 and between the pregnant group (combined group 1 and group 2) and the nonpregnant group (group 3). RESULT(S): Comparing the pregnant group with group 3, TLR4 messenger RNA (mRNA) and protein were both significantly up-regulated in the pregnant group. In contrast, TLR2 mRNA was significantly down-regulated, whereas TLR2 protein showed a tendency toward reduction. Detailed analysis between group 1 and group 3 revealed statistically significantly higher TLR2 and TLR4 protein in group 1. In terms of mRNA, TLR4 expression was still shown to be significantly increased in group 1, whereas TLR2 expression was markedly decreased in group 1. CONCLUSION(S): Decreased TLR2 mRNA and increased TLR4 in the tubal epithelial cells next to the infiltrated trophoblasts may be associated with aspects of the pathophysiology of tubal ectopic pregnancy in immune defense.

Adição da proteína específica do oviduto de porcas (pOSP) e da melatonina em meios de maturação e o efeito na clivagem in vitro de embriões suínos / Addition of the oviduct specific protein of porcine (pOSP) and melatonin in maturation media and their effect on the in vitro production of pig embryos

No presente estudo, utilizou-se a melatonina e a proteína específica do oviduto (pOSP) nos meios de maturação in vitro. Foram avaliadas a expansão do complexo cumulus-ovócito (CCOs), as concentrações intracelulares de espécies reativas de oxigênio (ROS) e o desenvolvimento embrionário nos diferentes grupos (C = controle; T1 = somente com melatonina; T2 = com melatonina e pOSP e T3 somente com pOSP). No tocante à expansão do CCOs, houve diferença (P<0,05) dos valores obtidos no grupo C em relação aos valores médios dos grupos T1, T2 e T3, porém não houve diferença entre os valores obtidos nos tratamentos (P>0,05). Na dosagem de ROS, não houve diferença entre os valores médios obtidos no grupo C (26,4±10,9) e o valor verificado no grupo T1 (23,4±7,8), porém no grupo T2 (21,3±9,7) o valor médio mostrou-se satisfatório em relação ao valor do grupo C. No entanto, o valor médio do grupo T3 (16,6±10,5) foi o que demonstrou resultado mais satisfatório quando comparado aos demais grupos (P<0,05). A produção de embriões foi avaliada por meio da taxa de clivagem. Não houve diferença (P >0,05) entre os valores obtidos entre o grupo C (48,9 %) e os valores verificados nos grupos T1 (51,5 %), T2 (50 %), T3 (57,7 %), nem destes entre si. Este estudo permitiu concluir que a proteína específica do oviduto recombinante e a melatonina foram eficientes em melhorar a expansão dos CCOs. Além disso, as células tratadas com pOSP mostraram-se com menor quantidade de ROS, podendo a pOSP ser considerada um antioxidante proteico.(AU)

The present study used melatonin and recombinant oviduct specific protein (pOSP) in in vitro maturation medium (IVM). The expansion of the cumulus-oocyte complexes (COCs), the intracellular concentrations of reactive oxygen species (ROS) and embryo development of the different groups were evaluated (C = control; T1 = melatonin; T2 = melatonin and pOSP and T3 = pOSP). Regarding the COCs expansion, the groups T1, T2 and T3 showed satisfactory results compared with group C (P<0.05), but there was no difference between treatments (P>0.05). In the ROS dosage, there was no difference between the mean values obtained in group C (26.4 ± 10.9) and group 1 (23.4 ± 7.8). However, in group 2 (21.3 ± 9.7), the average value was found to be satisfactory in relation group C. Despite that, the average value of treatment 3 (16.6 ± 10.5) was the most satisfactory result found compared to the other groups (P<0.05). The production of embryos was evaluated by cleavage rate, there was no difference between the values obtained in group C and the values recorded in groups T1 (51.5 %), T2 (50 %), T3 (57.7 %), and among them. This study showed that the pOSP and the melatonin were effective in the improvement of the expansion of COCs cells. In addition, the cells that were treated with pOSP presented a lower amount of ROS, allowing the pOSP to be considered a proteic antioxidant.(AU)

Non-invasive metabolomics for improved determination of embryonic sex markers in chemically defined culture medium.

Metabolic differences between early male and female embryos can be reflected in culture medium (CM). We used a single bovine embryo culture step (24h) supporting improved birth rates under chemically defined conditions (CDC) to investigate biomarker detection of embryonic sex in contrast to classical BSA-containing medium. In vitro matured slaughterhouse oocytes were fertilized in vitro with a single bull. Embryos were initially cultured in synthetic oviduct fluid with BSA. On day-6, morulae were cultured individually in droplets with (BSA) or without protein (CDC). On day-7, expanded blastocysts were sexed (amelogenin gene amplification) and CM was stored at -145°C until metabolomic analysis by UHPLC-TOF MS. N=10 embryos per group (i.e. male-protein; female-protein; male-non-protein; female-non-protein) were produced. Statistical analysis revealed N=6 metabolites with different concentrations in CM, N=5 in male embryos (methionine, tryptophan, N-stearoyl-valine, biotin and pipecolic acid), N=1 in female embryos (threonine) (P<0.05 in BSA; P<10-7 in CDC). Only the clear threshold between males and females in CDC allowed correct classification of 100% males and 91% females within 5 out of 6 biomarkers (one female outlier showing the male biomarker profile). The use of CDC represents a critical aspect in the efficient detection of embryonic sex biomarkers by metabolomics.

Exploring the oviductal fluid proteome by a lectin-based affinity approach.

The analysis of glycoproteins in body fluids represents a central task in the study of vital processes. Herein, we assessed the combined use of Concanavalin A and Wheat Germ Agglutinin as ligands to fractionate and enrich glycoproteins from oviductal fluid (OF), which is a source of molecules involved in fertilization. First, the selectivity was corroborated by a gel-based approach using glycoprotein staining and enzymatic deglycosylation. Nanoliquid chromatography-tandem mass spectrometry (nLC-ESI-MS/MS) further allowed the reliable identification of 134 nonbound as well as 130 lectin-bound OF proteins. Enrichment analysis revealed that 77% of the annotated proteins in the lectin-bound fraction were known glycoproteins (p-value [FDR] = 1.45E-31). The low variance of the number of peptide spectrum matches for each protein within replicates indicated a consistent reproducibility of the whole workflow (median CV 17.3% for technical replicates and 20.7% for biological replicates). Taken together, this study highlights the applicability of a lectin-based workflow for the comprehensive analysis of OF proteins and gives for the first time an insight into the broad glycoprotein content of OF.

Cadherin-6 type 2, K-cadherin (CDH6) is regulated by mutant p53 in the fallopian tube but is not expressed in the ovarian surface.

High-grade serous ovarian cancer (HGSOC) is the most lethal gynecological malignancy and may arise in either the fallopian tube epithelium (FTE) or ovarian surface epithelium (OSE). A mutation in p53 is reported in 96% of HGSOC, most frequently at R273 and R248. The goal of this study was to identify specific gene targets in the FTE that are altered by mutant p53, but not in the OSE. Gene analysis revealed that both R273 and R248 mutant p53 reduces CDH6 expression in the oviduct, but CDH6 was not detected in murine OSE cells. p53R273H induced SLUG and FOXM1 while p53R248W did not induce SLUG and only modestly increased FOXM1, which correlated with less migration as compared to p53R273H. An oviduct specific PAX8Cre/+/p53R270H/+ mouse model was created and confirmed that in vivo mutant p53 repressed CDH6 but was not sufficient to stabilize p53 expression alone. Overexpression of mutant p53 in the p53 null OVCAR5 cells decreased CDH6 levels indicating this was a gain-of-function. SLUG knockdown in murine oviductal cells with p53R273H restored CDH6 repression and a ChIP analysis revealed direct binding of mutant p53 on the CDH6 promoter. NSC59984, a small molecule that degrades mutant p53R273H, rescued CDH6 expression. In summary, CDH6 is expressed in the oviduct, but not the ovary, and is repressed by mutant p53. CDH6 expression with further validations may aide in establishing markers that inform upon the cell of origin of high grade serous tumors.

Adenocarcinoma of the cervix involving the fallopian tube mucosa: report of a case.

BACKGROUND: Fallopian tube involvement by cervical carcinoma has rarely been documented, with literature reports focusing primarily on squamous cell carcinoma. CASE PRESENTATION: In this report, we present the case of a 50 year old woman who presented with an abnormal Pap test with atypical squamous and glandular cells. A loop electrosurgical excision procedure (LEEP) was performed and led to the diagnosis of stage IB1 endocervical adenocarcinoma. Subsequent radical hysterectomy, bilateral salpingo-oophorectomy, and bilateral pelvic lymph node dissection showed a well-differentiated endocervical adenocarcinoma of usual type with superficial spread to the endometrium and right fallopian tube. The patient received no adjuvant therapy and has remained without evidence of disease. CONCLUSIONS: While the advent of more extensive fallopian tube sampling has led to increased discovery and discussion of fallopian tube involvement by metastatic carcinoma, its impact on treatment and prognosis remains to be seen.

Morphology and Aquaporin Immunohistochemistry of the Uterine Tube of Saanen Goats (Capra hircus): Comparison Throughout the Reproductive Cycle.

The expression of six different aquaporins (AQP1, 2, 3, 4, 5 and 9), integral membrane water channels that facilitate bi-directional passive movement of water, was investigated by immunohistochemistry in the uterine tube of pre-pubertal and adult Saanen goats (Capra hircus), comparing the different phases of the oestrous cycle. Regional morphology and secretory processes were markedly different during the goat oestrous cycle. The tested AQP molecules showed different expression patterns in comparison with already studied species. AQP1-immunoreactivity was evidenced at the endothelium of blood vessels and in nerve fibres, regardless of the tubal tract and cycle period. AQP4-immunoreactivity was shown on the lateral plasmalemma in the basal third of the epithelial cells at infundibulum and ampulla level in the cycling goats, more evidently during follicular than during luteal phase. No AQP4-immunoreactivity was noticed at the level of the isthmus region, regardless of the cycle phase. AQP5-immunoreactivity, localized at the apical surface of epithelial cells, increased from pre-puberty to adulthood. Thereafter, AQP5-immunoreactivity was prominent during the follicular phase, when it strongly decorated the apical plasmalemma of all epithelial cells at ampullary level. During luteal phase, immunoreactivity was discontinuous, being weak to strong at the apex of the secretory cells protruding into the lumen. In the isthmus region, the strongest AQP5-immunoreactivity was seen during follicular phase, with a clear localization in the apical plasmalemma of all the epithelial cells and also on the lateral plasmalemma. AQP2, 3 and 9 were undetectable all along the goat uterine tube. Likely, a collaboration of different AQP molecules sustains the fluid production in the goat uterine tube. AQP1-mediated transudation from the blood capillaries, together with permeation of the epithelium by AQP4 in the basal rim of the epithelial cells and final intervening of apical AQP5, could be involved in fluid production as well as in secretory processes.

Impact and mechanistic role of oral contraceptive pills on the number and epithelial type of ovarian cortical inclusion cysts; a clinicopathology and immunohistochemical study.

BACKGROUND: Ovarian epithelial cancers are among the most lethal women's cancers. There is no doubt about the preventive role of oral contraceptive pills (OCPs) in development of ovarian cancers. But, there are limited numbers of studies to address the effect of these agents on the number of cortical inclusion cysts (CICs), their epithelial type and suppression of the metaplastic phenomenon by these pills. The aim of this study was to clarify the role of these agents in the prevention of these cyst formation and tubal metaplasia and also examine the mesenchymal-epithelial transition theory in this context by immunohistochemical methods. METHODS: The representative section(s) of ovarian cortex from a total number of 201 consecutive total abdominal hysterectomy with bilateral or unilateral salpingo-oophorectomy specimens were examined for mean number of CICs and their epithelial type between two groups of the patients. Group A included the patients who were on oral contraceptive pills for more than 5 years. All of the subjects with other contraceptive methods or a history of less than 5 years contraceptive pills usage were stratified in group B. Sections from 20 cases in which more than five inclusion cysts were found, were selected for IHC staining with calretinine and PAX8 as markers for mesothelium and mullerian epithelium respectively. RESULTS: The mean age of the patients was 51.67 years with no significant differences between two groups. The mean number of cysts were 1.27 and 3.23 in group A and B respectively (P =0.0001). Similarly the mean number of CICs, lined by tubal epithelium, was significantly different between two groups (0.65 vs 2.65, P =0.0001). In IHC staining 123 out of 150 CICs (82 %) were PAX+ while only 7 CICs (4.8 %) showed positive reaction for calretinin irrespective of type of epithelium. CONCLUSION: Our findings showed that the use of OCP for more than five years in women, significantly prevents development of cortical inclusion cysts in the ovaries which lined by tubal (PAX8 positive) type epithelium. These findings may explain the alternative mechanism of oral contraceptive pills or long time use of progesterone in suppression of tubal type overgrowth and subsequently prevention of ovarian epithelial cancers.

First application of the Automated QUantitative Analysis (AQUA) technique to quantify PTEN protein expression in ovarian cancer: A correlative study of NCIC CTG OV.16.

BACKGROUND: Platinum resistance is a dominant cause of poor outcomes in advanced ovarian cancer (OC). A mechanism of platinum resistance is the inhibition of apoptosis through phosphatidylinositol 3 kinase (PI3K) pathway activation. The role of phosphatase and tensin homolog (PTEN), a negative regulator of this pathway, as a tumor biomarker is unclear. Quantitative analysis of PTEN expression as an alternative to immunohistochemistry has not been considered. PATIENTS AND METHODS: In 238 patient tumors from the NCIC-CTG trial OV.16, PTEN protein expression was quantified by Automated QUantitative Analysis (AQUA). Cox model was used to study the association between PTEN expression and clinical outcomes using a minimum p-value approach in univariate analysis. Multivariate analysis was used to adjust for clinical and pathological parameters. RESULTS: PTEN scores (range 13.9-192.3) of the 202 samples that passed quality control were analyzed. In univariate analysis, there was a trend suggesting an association between PTEN expression by AQUA as a binary variable (low ≤61 vs high >61) and progression free survival (HR=0.77, p=0.083), and in multivariate analysis, this association approached significance (HR=0.74, p=0.059). The relationship between quantitative PTEN expression and PFS differed (p=0.01 for interaction) by the extent of surgical debulking (residual disease (RD) <1cm or ≥1cm), with a numerically superior PFS in patients with high PTEN (23.5 vs 14.9m) only when RD<1cm (p=0.19). There was no association between PTEN levels and overall survival. CONCLUSIONS: AQUA is a novel method to measure PTEN expression. Further study of PTEN as a biomarker in OC is warranted.