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follicular development

Sinan Özçelik, İbrahim Kulaç, Mustafa Yazıcı, Esra Öcal
Aim: Studies on pediatric skin diseases in Turkey are not yet sufficient. It was aimed to characterize the prevalence of skin diseases, age and gender distribution in children living in the Erzincan region. Material and Methods: 10,115 children aged 0-16 years who reached to our outpatient clinic between 01.11.2014 and 30.11.2016 were included in the study. The frequency, age and gender distribution of the skin diseases were examined. The cases were divided into 4 groups; infantile period (0-2 years), preschool period (3-5 years), school period (6-11 years) and adolescence period (12-16 years)...
June 2018: Türk Pediatri Arşivi
Peng Li, Mingqiang Dong, Zhigang Wang
Previous studies demonstrated dysregulation of different microRNAs in thyroid cancer. Tetraspanins (TSPANs) are cell surface proteins with critical roles in many cellular processes, and implications in tumor development. Here we investigated the role of miR-369-3p in papillary thyroid cancer (PTC) and its association with TSPAN13. miR-369-3p and the TSPAN13 gene expression profiles of 513 thyroid cancer and 59 normal thyroid tissues were downloaded from the Cancer Genome Atlas database. Thyroid cancer tissues were classified according to the histological type, grouped based on low and high median miR-369-3p and TSPAN13 expression, and analyzed in relation to overall survival (OS) of patients...
August 2, 2018: Bosnian Journal of Basic Medical Sciences
Laura Sedra, Jean-Paul Paluzzi, Angela B Lange
In this study, a long neuropeptide F receptor of the blood-feeding hemipteran, Rhodnius prolixus (RhoprNPFR) has been cloned and characterized. Approximately 70% of the RhoprNPFR deduced protein sequence is identical to that of other hemipteran NPFRs. RhoprNPFR has seven highly-conserved transmembrane domains, two cysteine residues in the 2nd and 3rd extracellular loops that likely form a disulfide bond integral for maintaining the structure of the receptor, and a conserved DRY motif after the third transmembrane domain...
2018: PloS One
Jennifer K Lue, Jennifer E Amengual
PURPOSE OF REVIEW: Enhancer of Zeste Homolog 2 (EZH2) is histone methyltransferase and catalyzes the methylation of histone 3 lysine 27, a mark of transcriptional repression. Various studies have elucidated the complex role of EZH2 in both normal biology and tumorigenesis. Here, we critically review the emerging role of EZH2 in malignancies, the development of small molecule inhibitors of EZH2, and their application in lymphoma. RECENT FINDINGS: Activating mutations and overexpression of EZH2 are found in non-Hodgkin lymphoma (NHL)...
August 15, 2018: Current Hematologic Malignancy Reports
Luju Lai, Xiaoyun Shen, Haoqin Liang, Yingying Deng, Zhuandi Gong, Suocheng Wei
Mice of FRBI-1, FRBI-2, and FRBI-3 groups were intramuscularly injected with 20, 30, and 40mg/kg, respectively, for five consecutive days. Ovarian weights of three FRBI groups were reduced in comparison with FSH group. Ovarian cortex thicknesses (OCT) of the FRBI-3 group were less than that of the FSH group (P<0.05). As compared to FSH group, there were fewer numbers of secondary follicles (SFs) and mature follicles (MF) on the ovaries of FRBI-treated mice numbers of primary follicles (PFs) and SFs also decreased...
2018: BioMed Research International
F Cuadro, P C Dos Santos-Neto, A Pinczak, N Barrera, M Crispo, A Menchaca
The aim of the present study was to evaluate the effect of serum progesterone concentrations during the superstimulatory treatment of the first follicular wave on fertilization rate and embryo development in sheep. A total of 71 Merino ewes received a superstimulatory FSH treatment during Wave 1 of ovarian follicular development (Day 0 Protocol), which was administrated under low progesterone concentrations typical of the early luteal phase (control group, n = 33) or under high progesterone concentrations induced by the administration of an intravaginal device from Day 0 to Day 3 containing 0...
August 9, 2018: Animal Reproduction Science
Immacolata Cristina Nettore, Annamaria Colao, Paolo Emidio Macchia
Several epidemiological studies suggest an increased incidence of thyroid carcinoma (TC) in recent years, especially for the papillary histotype (PTC), suggesting that specific carcinogens might promote molecular abnormalities that are typical of PTC. The increased incidence is probably attributed to more intensive and sensitive diagnostic procedures, even if recent data suggest that various toxic elements could explain the phenomenon. Ionizing radiation exposure represents the most accepted risk factor for differentiated thyroid cancer that includes both the follicular and papillary histotypes...
August 13, 2018: International Journal of Environmental Research and Public Health
Huanbin Xu, Widade Ziani, Jiasheng Shao, Lara A Doyle-Meyers, Kasi E Russell-Lodrigue, Marion S Ratterree, Ronald S Veazey, Xiaolei Wang
Germinal center (GC) CD4+ follicular Th (Tfh) cells are critical for cognate B cell help in humoral immune responses to pathogenic infections. Although Tfh cells are expanded or depleted in HIV/SIV-infected adults, the effects of pediatric HIV/SIV infection on Tfh cells remain unclear. In this study, we examined changes in lymphoid follicle formation in lymph nodes focusing on GC Tfh cells, B cell development, and differentiation in SIV-infected neonatal rhesus macaques ( Macaca mulatta ) compared with age-matched cohorts...
August 13, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Xuan-Hung Nguyen, Yves Dauvilliers, Clémence Quériault, Corine Perals, Raphaelle Romieu-Mourez, Pierre-Emmanuel Paulet, Raphaël Bernard-Valnet, Nicolas Fazilleau, Roland Liblau
Despite genetic and epidemiological evidence strongly supporting an autoimmune basis for narcolepsy type 1, the mechanisms involved have remained largely unknown. Here, we aimed to investigate whether the frequency and function of circulating follicular helper and follicular regulatory T cells are altered in narcolepsy type 1. Peripheral blood mononuclear cells were collected from 32 patients with narcolepsy type 1, including 11 who developed disease after Pandemrix® vaccination, and 32 age-, sex-, and HLA-DQB1*06:02-matched healthy individuals...
August 6, 2018: Journal of Autoimmunity
Khemayanto Hidayat, Hui-Juan Li, Bi-Min Shi
The associations between anthropometric factors and non-Hodgkin's lymphoma (NHL) risk remain inconclusive. A meta-analysis was performed to clarify these associations. PubMed and Web of Science were searched for relevant prospective observational studies. A random-effects model was used to generate the summary relative risks (RRs) with 95% confidence intervals (CIs). A total of 22 prospective cohort studies, with over 20,000 NHL cases, were included in the present meta-analysis. The summary RRs of NHL risk were 1...
September 2018: Critical Reviews in Oncology/hematology
Aaron B Bogutz, Rosemary Oh-McGinnis, Karen J Jacob, Rita Ho-Lau, Ting Gu, Marina Gertsenstein, Andras Nagy, Louis Lefebvre
The basic helix-loop-helix (bHLH) transcription factor ASCL2 plays essential roles in diploid multipotent trophoblast progenitors, intestinal stem cells, follicular T-helper cells, as well as during epidermal development and myogenesis. During early development, Ascl2 expression is regulated by genomic imprinting and only the maternally inherited allele is transcriptionally active in trophoblast. The paternal allele-specific silencing of Ascl2 requires expression of the long non-coding RNA Kcnq1ot1 in cis and the deposition of repressive histone marks...
August 10, 2018: PLoS Genetics
Poorva Bindal, Sharif Aa Jalil, Lisa M Holle, Jessica M Clement
Nearly all men with prostate cancer who are treated with androgen deprivation therapy develop disease progression. There is considerable evidence to suggest that CXCL 13 released by tumor cells leads to B-cell infiltration into the prostate cells. This B-cell infiltration has been postulated to play a role in development of disease progression following androgen-deprivation therapies. We present a case of a patient who achieved remission of metastatic castrate-resistant prostate cancer after receiving rituximab and bendamustine for the treatment of follicular lymphoma...
August 9, 2018: Journal of Oncology Pharmacy Practice
Juan Carlos Yam-Puc, Lingling Zhang, Yang Zhang, Kai-Michael Toellner
B-cell development is characterized by a number of tightly regulated selection processes. Signals through the B-cell receptor (BCR) guide and are required for B-cell maturation, survival, and fate decision. Here, we review the role of the BCR during B-cell development, leading to the emergence of B1, marginal zone, and peripheral follicular B cells. Furthermore, we discuss BCR-derived signals on activated B cells that lead to germinal center and plasma cell differentiation.
2018: F1000Research
Rafael M Rezende, Amanda J Lanser, Stephen Rubino, Chantal Kuhn, Nathaniel Skillin, Thais G Moreira, Shirong Liu, Galina Gabriely, Bruna A David, Gustavo B Menezes, Howard L Weiner
γδ T cells have many known functions, including the regulation of antibody responses. However, how γδ T cells control humoral immunity remains elusive. Here we show that complete Freund's adjuvant (CFA), but not alum, immunization induces a subpopulation of CXCR5-expressing γδ T cells in the draining lymph nodes. TCRγδ+ CXCR5+ cells present antigens to, and induce CXCR5 on, CD4 T cells by releasing Wnt ligands to initiate the T follicular helper (Tfh) cell program. Accordingly, TCRδ-/- mice have impaired germinal center formation, inefficient Tfh cell differentiation, and reduced serum levels of chicken ovalbumin (OVA)-specific antibodies after CFA/OVA immunization...
August 8, 2018: Nature Communications
Rasha T Hamza, Marwa F Mira, Amira I Hamed, Treiz Ezzat, Mahmoud T Sallam
Most girls with Turner syndrome (TS) suffer from incomplete sexual development, premature ovarian failure, and infertility due to abnormal ovarian folliculogenesis. Serum anti-Müllerian hormone (AMH) levels reflect the ovarian reserve in females, even in childhood. Thus, we aimed to assess serum AMH levels in girls with TS and its relation to karyotype, spontaneous puberty, and growth hormone (GH) therapy. Fifty TS were compared to 50 age- and sex-matched controls. All subjects were subjected to history, anthropometric assessment, Tanner pubertal staging and measurement of serum follicle stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), and AMH...
August 8, 2018: American Journal of Medical Genetics. Part A
Krzysztof Kaliszewski, Dorota Diakowska, Beata Wojtczak, Zdzisław Forkasiewicz
Background and objective: The risk of malignancy from "atypia of undetermined significance/follicular lesion of undetermined significance" (AUS/FLUS) is estimated to lie between 5% and 15%; however, some authors suggest that the risk of malignancy in AUS/FLUS depends upon specific clinical situations. This was a retrospective study which aimed to determine the incidence and risk of thyroid cancer (TC) based upon selected ultrasound features from patients with thyroid nodules (TN) classified as AUS/FLUS...
2018: Cancer Management and Research
Mette Dahl, Iben Daugaard, Maria Schertz Andersen, Thomas Birkballe Hansen, Kirsten Grønbæk, Jørgen Kjems, Lasse Sommer Kristensen
Circular RNAs (circRNAs) are covalently closed endogenous molecules with tissue- and disease-specific expression patterns, which have potential as diagnostic and prognostic biomarkers in cancer. The molecules are formed by a backsplicing event linking the 3'-end of an exon to the 5'-end of the same or an upstream exon, and they exert diverse regulatory functions important in carcinogenesis. The landscape of circRNA expression has not been characterized in B-cell malignancies, and current methods for circRNA quantification have several limitations that prevent development of clinically applicable assays...
August 7, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
Lan He, Wangpeng Gu, Meng Wang, Xiaoyan Chang, Xiaoyu Sun, Yuan Zhang, Xuan Lin, Chenghua Yan, Weiguo Fan, Pan Su, Yanming Wang, Chunyan Yi, Guomei Lin, Li Li, Yu Jiang, Junxia Lu, Chen Dong, Haikun Wang, Bing Sun
T-follicular helper (TFH ) cells are a subset of CD4+ helper T cells that help germinal center (GC) B-cell differentiation and high-affinity antibody production during germinal center reactions. Whether important extracellular molecules control TFH differentiation is not fully understood. Here, we demonstrate that a secreted protein extracellular matrix protein 1 (ECM1) is critical for TFH differentiation and antibody response. A lack of ECM1 inhibited TFH cell development and impaired GC B-cell reactions and antigen-specific antibody production in an antigen-immunized mouse model...
August 7, 2018: Proceedings of the National Academy of Sciences of the United States of America
Kieu-Suong Le, Patricia Amé-Thomas, Karin Tarte, Françoise Gondois-Rey, Samuel Granjeaud, Florence Orlanducci, Etienne D Foucher, Florence Broussais, Reda Bouabdallah, Thierry Fest, Dominique Leroux, Sapna Yadavilli, Patrick A Mayes, Luc Xerri, Daniel Olive
A better characterization of T-cell subsets in the microenvironment of classical Hodgkin lymphoma (cHL) would help to develop immunotherapies. Using multicolor flow cytometry, we identified in 6 of 43 cHL tissue samples a previously unrecognized subset of CD8 T cells coexpressing CXCR5 and inducible T-cell costimulator (ICOS) molecules (CD8CXCR5+ICOS+ ). These cells shared phenotypic features with follicular helper T (TFH ) cells including low CCR7 expression together with high expression of B-cell lymphoma-6, programmed cell death 1, B and T lymphocyte attenuator, CD200, and OX40...
August 14, 2018: Blood Advances
Mika Shimamura, Nobuyuki Shibusawa, Tomomi Kurashige, Zhanna Mussazhanova, Hiroki Matsuzaki, Masahiro Nakashima, Masanobu Yamada, Yuji Nagayama
The BRAFV600E mutation is the most prevalent driver mutation of sporadic papillary thyroid cancers (PTC). It was previously shown that prenatal or postnatal expression of BRAFV600E under elevated TSH levels induced thyroid cancers in several genetically engineered mouse models. In contrast, we found that postnatal expression of BRAFV600E under physiologic TSH levels failed to develop thyroid cancers in conditional transgenic Tg(LNL-BrafV600E) mice injected in the thyroid with adenovirus expressing Cre under control of the thyroglobulin promoter (Ad-TgP-Cre)...
2018: PloS One
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