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Follicle T cell

M Herian, M R Luck, M Grzesiak
Recently it has been shown that vitamin D(3) acting via its cognate receptor (VDR) regulates the growth, differentiation and function of female reproductive tissues including ovary. The aim of the study was to examine the effect of testosterone (T) and its antagonist 2-hydroxyflutamide (HF) on VDR protein expression and function in porcine ovarian follicles. Medium size antral follicles expressing great amount of androgen receptors and represent high steroidogenic activity were used in this research. After 6 h incubation of whole follicles with T, HF or T+HF, immunohistochemical analysis of VDR revealed its nuclear localization in granulosa and theca interna cells in control and experimental groups...
March 12, 2018: Physiological Research
M Cecilia Berin, Alexander Grishin, Madhan Masilamani, Donald Y Leung, Scott H Sicherer, Stacie M Jones, A Wesley Burks, Alice K Henning, Peter Dawson, Joanna Grabowska, Charuta Agashe, Wendy F Davidson, Robert A Wood, Hugh A Sampson
BACKGROUND: Egg allergy is phenotypically heterogeneous. A subset of egg allergic individuals can tolerate egg in an extensively heated form. Inclusion of baked-egg (BE) into their diet accelerates resolution of egg allergy. Conversely, BE reactivity is associated with persistent disease. The immune basis of this clinical heterogeneity is unknown. OBJECTIVES: To study egg-specific antibody, basophil, and T cell responses in children with reactivity or tolerance to BE...
March 5, 2018: Journal of Allergy and Clinical Immunology
W Yan-Juan, S Yu-Juan, X U Yu-Xin, C Jian-Ping
Objective To observe the destroyed architecture of splenic lymphoid follicles in mice infected with Schistosoma japonicum by immunohistochemistry. Methods The mice infected with S. japonicum (20 cercariae/mouse) for 8 weeks were sacrificed, and the splenic samples were paraffin embedded and sliced. The sections were first stained by hematoxylin and eosin to observe the massive structure of splenic lymphoid follicles, and then B cells, follicular dendritic cells (FDC) and germinal center cells were labeled with anti-B220, anti-CD21 or anti-Ki67 antibodies respectively by immunohistochemistry to observe the distribution of the specific cells of lymphoid follicles...
August 21, 2017: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Mohammad Arif Rahman, Katherine M McKinnon, Tatiana S Karpova, David A Ball, David J Venzon, Wenjin Fan, Guobin Kang, Qingsheng Li, Marjorie Robert-Guroff
Follicular CD8+ T (fCD8) cells reside within B cell follicles and are thought to be immune-privileged sites of HIV/SIV infection. We have observed comparable levels of fCD8 cells between chronically SIV-infected rhesus macaques with low viral loads (LVL) and high viral loads (HVL), raising the question concerning their contribution to viremia control. In this study, we sought to clarify the role of SIV-specific fCD8 cells in lymph nodes during the course of SIV infection in rhesus macaques. We observed that fCD8 cells, T follicular helper (Tfh) cells, and T follicular regulatory cells (Tfreg) were all elevated in chronic SIV infection...
March 5, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Deniz Genç, Noushin Zibandeh, Ercan Nain, Muazzez Gökalp, Ahmet Oğuzhan Özen, Mehmet Kamil Göker, Tunç Akkoç
BACKGROUND: Asthma is a chronic inflammatory disease in which inflammatory responses have the polarization of CD4+ T cells to Th2 cells. Dental follicle mesenchymal stem cells (DFSCs) have strong anti-inflammatory properties comparable to other mesenchymal stem cells. OBJECTIVE: We investigated the immunomodulatory effects of DFSCs on CD4+ T helper cell responses of asthmatic patients and compared the results with those obtained with asthmatic subjects on immunotherapy and with healthy individuals...
March 2, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
M T Fernández-Figueras, X Saenz, P Vargas, C T Thompson, C Carrato, L Puig, C Ferrándiz, A Ariza
BACKGROUND: Actinic keratosis (AK) may show extension down follicules, not only in cases with full-thickness epidermal atypia ("bowenoid" AK), but also in cases with atypia limited to the epidermal basalis. Previous studies have demonstrated that in bowenoid AK, follicular extension is usually superficial, being limited to the upper follicular segment. Little is known about the depth of follicular involvement in cases of iSCC arising from AK and the role of the follicle in iSCC pathogenesis...
February 28, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
Uwe Wollina, Birgit Heinig, André Koch, Andreas Nowak, Georgi Tchernev, Katlein França, Torello Lotti
Lichen planus is a T-cell mediated autoimmune disorder affecting the skin and mucous membranes. Ulcerating lichen planus is uncommon mostly on oral and genital mucosa but not skin. Lichen planopilaris, however, is a subtype of lichen planus affection hair follicles and leading to permanent scarring alopecia. We report a case of lichen planopilaris of the scalp with multiple alopecic patches ulceration - a hitherto unreported clinical feature. The patient was treated surgically, and the defect could be closed by combined tissue advancement and extension...
January 25, 2018: Open Access Macedonian Journal of Medical Sciences
Jalila Alshekaili, Rochna Chand, Cindy Eunhee Lee, Susan Corley, Kristy Kwong, Ilenia Papa, David A Fulcher, Katrina L Randall, Jennifer W Leiding, Cindy S Ma, Marc R Wilkins, Gulbu Uzel, Chris C Goodnow, Carola G Vinuesa, Stuart G Tangye, Matthew C Cook
A subset of human follicular helper T cells (TFH) cells expresses CD57 for which no distinct function has been identified. We show that CD57+ TFH cells are universally PD-1hi , but compared to their CD57- PD-1hi counterparts, express little IL-21 or IL-10 among others. Instead, CD57 expression on TFH cells marks cytotoxicity transcriptional signatures that translate into only a weak cytotoxic phenotype. Similarly, circulating PD-1+ CD57+ CD4+ T cells make less cytokine than their CD57- PD-1+ counterparts, but have a prominent cytotoxic phenotype...
February 23, 2018: Scientific Reports
Dionysios C Watson, Eirini Moysi, Antonio Valentin, Cristina Bergamaschi, Santhi Devasundaram, Sotirios P Fortis, Jenifer Bear, Elena Chertova, Julian Bess, Ray Sowder, David J Venzon, Claire Deleage, Jacob D Estes, Jeffrey D Lifson, Constantinos Petrovas, Barbara K Felber, George N Pavlakis
B cell follicles in secondary lymphoid tissues represent an immune privileged sanctuary for AIDS viruses, in part because cytotoxic CD8+ T cells are mostly excluded from entering the follicles that harbor infected T follicular helper (TFH) cells. We studied the effects of native heterodimeric IL-15 (hetIL-15) treatment on uninfected rhesus macaques and on macaques that had spontaneously controlled SHIV infection to low levels of chronic viremia. hetIL-15 increased effector CD8+ T lymphocytes with high granzyme B content in blood, mucosal sites and lymph nodes, including virus-specific MHC-peptide tetramer+ CD8+ cells in LN...
February 2018: PLoS Pathogens
Judith Agudo, Eun Sook Park, Samuel A Rose, Eziwoma Alibo, Robert Sweeney, Maxime Dhainaut, Koichi S Kobayashi, Ravi Sachidanandam, Alessia Baccarini, Miriam Merad, Brian D Brown
Stem cells are critical for the maintenance of many tissues, but whether their integrity is maintained in the face of immunity is unclear. Here we found that cycling epithelial stem cells, including Lgr5+ intestinal stem cells, as well as ovary and mammary stem cells, were eliminated by activated T cells, but quiescent stem cells in the hair follicle and muscle were resistant to T cell killing. Immune evasion was an intrinsic property of the quiescent stem cells resulting from systemic downregulation of the antigen presentation machinery, including MHC class I and TAP proteins, and is mediated by the transactivator NLRC5...
February 20, 2018: Immunity
App Teh, U Z Izzati, K Mori, N Fuke, T Hirai, G Kitahara, R Yamaguchi
Bovine granulosa cells (GC) vary in their morphological aspect during different stages of folliculogenesis. In this study, 10 morphologically normal bovine ovaries were collected to study the structural aspects of different stages of GC using intermediate filament protein antibodies including cytokeratin AE1/AE3 (AE1/AE3), vimentin, nectin-4 and desmin. Hormonal immunolocalization was assessed using the immunomarkers anti-Müllerian hormone (AMH) and inhibin alpha. In addition, tumour markers and proliferation markers using c-erbB-2 oncoprotein and proliferating cell nuclear antigen, respectively, were investigated...
February 15, 2018: Reproduction in Domestic Animals, Zuchthygiene
Na Yin, Yanlin Wang, Xueyan Lu, Ranran Liu, Lianshuang Zhang, Wei Zhao, Wendan Yuan, Qianqian Luo, Hao Wu, Xiying Luan, Hongqin Zhang
BACKGROUND: Human placenta-derived mesenchymal stem cell (hPMSC) transplantation has been demonstrated to be an effective way of recovering ovarian function in mice with autoimmune induced premature ovarian failure (POF). But the exact mechanism remains unclear. The goal of the present study is to investigate the role of immune factors (T-helper 17 (Th17), cytotoxic T (Tc17) and regulatory T (Treg) cells) in the recovery of ovarian function and whether the phosphatidylinositol 3-kinase (PI3K)/Akt signal pathway is involved in the regulation...
February 14, 2018: Stem Cell Research & Therapy
Annie A Guedikian, Alexandria Y Lee, Tristan R Grogan, David H Abbott, Karla Largaespada, Gregorio D Chazenbalk, Daniel A Dumesic
OBJECTIVE: To determine the degree to which E2 hyperresponsiveness to FSH and antimüllerian hormone (AMH) overproduction in normal-weight women with polycystic ovary syndrome (PCOS) correlate with increased antral follicle number (AFN), hyperandrogenism, and/or metabolic dysfunction. DESIGN: Prospective cohort study. SETTING: Academic medical center. PATIENT(S): Seven normal-weight women with PCOS (1990 National Institutes of Health criteria) ages 20-34 years and 13 age- and body mass index- (BMI-; 18...
February 7, 2018: Fertility and Sterility
Matthew P Bronnimann, Pamela J Skinner, Elizabeth Connick
The majority of HIV replication occurs in secondary lymphoid organs (SLOs) such as the spleen, lymph nodes, and gut-associated lymphoid tissue. Within SLOs, HIV RNA+ cells are concentrated in the B-cell follicle during chronic untreated infection, and emerging data suggest that they are a major source of replication in treated disease as well. The concentration of HIV RNA+ cells in the B-cell follicle is mediated by several factors. Follicular CD4+ T-cell subsets including T-follicular helper cells and T-follicular regulatory cells are significantly more permissive to HIV than extrafollicular subsets...
2018: Frontiers in Immunology
Birte S Steiniger, Christine Ulrich, Moritz Berthold, Michael Guthe, Oleg Lobachev
We have reconstructed small parts of capillary networks in the human splenic white pulp using serial sections immunostained for CD34 alone or for CD34 and CD271. The three-dimensional (3D) models show three types of interconnected networks: a network with very few long capillaries inside the white pulp originating from central arteries, a denser network surrounding follicles plus periarterial T-cell regions and a network in the red pulp. Capillaries of the perifollicular network and the red pulp network have open ends...
2018: PloS One
David Chiang, Xintong Chen, Stacie M Jones, Robert A Wood, Scott H Sicherer, A Wesley Burks, Donald Y M Leung, Charuta Agashe, Alexander Grishin, Peter Dawson, Wendy F Davidson, Leah Newman, Robert Sebra, Miriam Merad, Hugh A Sampson, Bojan Losic, M Cecilia Berin
BACKGROUND: The contribution of phenotypic variation of peanut-specific T cells to clinical allergy or tolerance to peanut is not well understood. OBJECTIVES: Our objective was to comprehensively phenotype peanut-specific T cells in the peripheral blood of individuals with and without peanut allergy (PA). METHODS: We obtained samples from PA individuals, including a cohort undergoing baseline peanut challenges for an immunotherapy trial (CoFAR6)...
January 30, 2018: Journal of Allergy and Clinical Immunology
Zheng Liu, Fei Yang, Hao Zheng, Zhan Fan, Sha Qiao, Lei Liu, Juan Tao, Qingming Luo, Zhihong Zhang
It remains unclear how monocytes are mobilized to amplify inflammatory reactions in T cell-mediated adaptive immunity. Here, we investigate dynamic cellular events in the cascade of inflammatory responses through intravital imaging of a multicolor-labeled murine contact hypersensitivity (CHS) model. We found that monocytes formed clusters around hair follicles in the CHS model. In this process, effector T cells encountered dendritic cells under regions of monocyte clusters and secreted IFN-γ, which mobilizes CCR2-dependent monocyte interstitial migration and CXCR2-dependent monocyte cluster formation...
January 31, 2018: Journal of Investigative Dermatology
Amélie Nicolau, Karin Lemberger, Marion Mosca, Antoine Leclerc, Alexis Lécu, Didier Pin
BACKGROUND: Captive Andean bears (Tremarctos ornatus) develop a distinct alopecic syndrome of unknown aetiology. HYPOTHESIS/OBJECTIVES: To describe the histological features of healthy Andean bear skin, to define the clinical and histopathological features of Andean bears with signs of alopecia, and to propose an aetiopathogenesis. ANIMALS: Eighteen healthy Andean bears housed in 12 European zoos and 13 Andean bears with mild to severe alopecia housed in nine European zoos...
January 31, 2018: Veterinary Dermatology
Haiying Guo, Yizhan Xing, Yiming Zhang, Long He, Fang Deng, Xiaogen Ma, Yuhong Li
Dermal papilla (DP) plays important roles in hair follicle regeneration. Long-term culture of mouse DP cells can provide enough cells for research and application of DP cells. We optimized the culture strategy for DP cells from three dimensions: stepwise dissection, collagen I coating, and optimized culture medium. Based on the optimized culture strategy, we immortalized primary DP cells with SV40 large T antigen, and established several immortalized DP cell strains. By comparing molecular expression and morphologic characteristics with primary DP cells, we found one cell strain named iDP6 was similar with primary DP cells...
2018: PeerJ
Gabriela M Webb, Shengbin Li, Gwantwa Mwakalundwa, Joy M Folkvord, Justin M Greene, Jason S Reed, Jeffery J Stanton, Alfred W Legasse, Theodore Hobbs, Lauren D Martin, Byung S Park, James B Whitney, Emily K Jeng, Hing C Wong, Douglas F Nixon, R Brad Jones, Elizabeth Connick, Pamela J Skinner, Jonah B Sacha
Sequestering of latent HIV in follicular helper T cells within B-cell follicles that largely exclude cytotoxic T cells is a major barrier to cellular immune-based approaches to eradicate HIV. Here, we show that the clinical-grade human interleukin-15 (IL-15) superagonist ALT-803 activates and redirects simian immunodeficiency virus (SIV)-specific CD8+ T cells from the peripheral blood into B-cell follicles. In agreement with the increased trafficking of SIV-specific cytotoxic T cells to sites of cryptic viral replication, lymph nodes of elite controlling macaques contained fewer cells expressing SIV RNA or harboring SIV DNA post-ALT-803 treatment...
January 23, 2018: Blood Advances
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