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https://www.readbyqxmd.com/read/29350274/t-lymphocytes-facilitate-brain-metastasis-of-breast-cancer-by-inducing-guanylate-binding-protein-1-expression
#1
Dana A M Mustafa, Rute M S M Pedrosa, Marcel Smid, Marcel van der Weiden, Vanja de Weerd, Alex L Nigg, Cor Berrevoets, Lona Zeneyedpour, Neibla Priego, Manuel Valiente, Theo M Luider, Reno Debets, John W M Martens, John A Foekens, Anieta M Sieuwerts, Johan M Kros
The discovery of genes and molecular pathways involved in the formation of brain metastasis would direct the development of therapeutic strategies to prevent this deadly complication of cancer. By comparing gene expression profiles of Estrogen Receptor negative (ER-) primary breast tumors between patients who developed metastasis to brain and to organs other than brain, we found that T lymphocytes promote the formation of brain metastases. To functionally test the ability of T cells to promote brain metastasis, we used an in vitro blood-brain barrier (BBB) model...
January 19, 2018: Acta Neuropathologica
https://www.readbyqxmd.com/read/29344502/orbital-epstein-barr-virus-positive-polymorphic-b-cell-lymphoproliferative-disorder-in-an-apparently-immunocompetent-woman
#2
Michael D Abendroth, Michael G Bayerl, Michael J Wilkinson, David F Claxton, Charles S Specht
We report a rare case of Epstein-Barr virus (EBV)-positive polymorphic B-cell lymphoproliferative disorder (LPD) involving the lacrimal gland of a 28-year-old, apparently immunocompetent woman. She presented with a chief complaint of orbital swelling and tenderness and was found to have a lesion involving the right lacrimal gland and distal superior and lateral rectus muscles. Histology of the lesion revealed histiocytes with pleomorphic nuclei, reactive lymphocytes, and scattered cells that resembled the Reed-Sternberg (R-S) cells of classical Hodgkin lymphoma...
December 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29341428/epigenetic-silencing-of-tap1-in-aldefluor-breast-cancer-stem-cells-contributes-to-their-enhanced-immune-evasion
#3
Mohammad Sultan, Dejan Vidovic, Arianne S Paine, Thomas T Huynh, Krysta M Coyle, Margaret L Thomas, Brianne M Cruickshank, Cheryl A Dean, Derek R Clements, Youra Kim, Kristin Lee, Shashi A Gujar, Ian C Weaver, Paola Marcato
Avoiding detection and destruction by immune cells is key for tumor initiation and progression. The important role of cancer stem cells (CSC) in tumor initiation has been well established, yet their ability to evade immune detection and targeting is only partly understood. To investigate the ability of breast CSCs to evade immune detection we identified a highly tumorigenic population in a spontaneous murine mammary tumor based on increased aldehyde dehydrogenase (ALDH) activity. We performed tumor growth studies in immunocompetent and immunocompromised mice...
January 17, 2018: Stem Cells
https://www.readbyqxmd.com/read/29340471/epididymo-orchitis-caused-by-histoplasma-capsulatumin-a-colombian-patient
#4
Carlos Andrés Botero-García, Álvaro Adolfo Faccini-Martínez, Erika Uribe, Omar-Javier Calixto, Carlos Eduardo Pérez-Díaz, Pedro Pablo Osejo-Diago, Pedro Gabriel Franco-Maz
Although histoplasmosis is generally a self-limited disease, disseminated infection can occur in patients lacking effective cell-mediated immunity, reaching virtually every organ, even the genitourinary tract in rare cases. We report a case of epididymo-orchitis in an immunocompetent 38-year-old bricklayer from the rural area of Villeta, Cundinamarca, Colombia. The patient presented with testicular pain and macroscopic scrotal changes requiring a left orchiectomy, with microbiological isolation and molecular confirmation of Histoplasma capsulatum...
November 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29340126/hepatosplenic-gamma-delta-t-cell-lymphoma-hsgdtcl-two-rare-case-reports-from-western-india
#5
Irappa Madabhavi, Gaurang Modi, Harsha Panchal, Apurva Patel, Swaroop Revannasiddaiah, Asha Anand, Sonia Parikh, Kshitij Joshi, Malay Sarkar
Peripheral T cell lymphomas are a heterogeneous group of post-thymic, mature lymphoid malignancies, accounting for approximately 10-15% of all non-Hodgkin's lymphomas. Hepatosplenic T-cell lymphoma (HSGDTCL) is a rare entity, which is characterized by primary extra nodal disease with typical sinusoidal or sinusal infiltration of the liver and the spleen, respectively by expression of the T-cell receptor γδ chain, and by a number of other frequent clinicopathologic features, including aggressive course of disease...
October 1, 2017: International Journal of Hematology-oncology and Stem Cell Research
https://www.readbyqxmd.com/read/29337311/dinaciclib-induces-immunogenic-cell-death-and-enhances-anti-pd-1-mediated-tumor-suppression
#6
Dewan Md Sakib Hossain, Sarah Javaid, Mingmei Cai, Chunsheng Zhang, Anandi Sawant, Marlene Hinton, Manjiri Sathe, Jeff Grein, Wendy Blumenschein, Elaine M Pinheiro, Alissa Chackerian
Blockade of the checkpoint inhibitor programmed death 1 (PD1) has demonstrated remarkable success in the clinic for the treatment of cancer; however, a majority of tumors are resistant to anti-PD1 monotherapy. Numerous ongoing clinical combination therapy studies will likely reveal additional therapeutics that complement anti-PD1 blockade. Recent studies found that immunogenic cell death (ICD) improves T cell responses against different tumors, thus indicating that ICD may further augment antitumor immunity elicited by anti-PD1...
January 16, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29333016/clinicopathological-features-and-outcomes-in-primary-central-nervous-system-lymphoma-a-10-year-experience
#7
Chaitanya Krishna Puligundla, Stalin Bala, Ashok Kumar Karnam, Sadashivudu Gundeti, Tara Roshni Paul, Megha S Uppin, Lakshmi Srinivas Maddali
Context: Primary central nervous system lymphoma (PCNSL) is a variant of extranodal lymphoma, accounting for 4% of primary central nervous system tumors. PCNSL was more common in immunocompetent individuals. International Extranodal Lymphoma Study Group (IELSG) scoring was used for prognostication. High-dose methotrexate regimens along with radiotherapy improved outcomes in PCNSL. Aims: The aim of this study is to analyze the clinical and pathological features, progression-free survival (PFS), and overall survival (OS) in patients with PCNSL...
October 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/29331570/meningeal-marginal-zone-b-cell-lymphoma-the-meningioma-trap
#8
Alexandre Villeneuve, François Rubin, Pierre Bonfils
OBJECTIVE: To report a case of marginal zone MALT lymphoma of the temporal dura mater, initially mistaken for temporal meningioma. CASE REPORT: A 60-year-old immunocompetent woman, followed for more than 10 years for temporal meningioma causing vertigo and mixed hearing loss, presented with cervical lymphadenopathy, revealing marked progression of an intracranial lesion, leading to a diagnosis of marginal zone MALT lymphoma based on histological examination of a cervical lymph node...
January 10, 2018: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/29331419/the-therapeutic-potential-of-human-adipose-derived-mesenchymal-stem-cells-producing-cxcl10-in-a-mouse-melanoma-lung-metastasis-model
#9
Hamed Mirzaei, Hossein Salehi, Reza Kazemi Oskuee, Ali Mohammadpour, Hamid Reza Mirzaei, Mohammad Reza Sharifi, Reza Salarinia, Hossein Yousofi Darani, Mojgan Mokhtari, Aria Masoudifar, Amirhossein Sahebkar, Rasoul Salehi, Mahmoud Reza Jaafari
Interferon γ-induced protein 10 kDa (IP-10) is a potent chemoattractant and has been suggested to enhance antitumor activity and mediate tumor regression through multiple mechanisms of action. Multiple lines of evidence have indicated that genetically-modified adult stem cells represent a potential source for cell-based cancer therapy. In the current study, we assessed therapeutic potential of human adipose derived mesenchymal stem cells (hADSC) genetically-modified to express IP-10 for the treatment of lung metastasis in an immunocompetent mouse model of metastatic melanoma...
January 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29330826/antibody-response-to-polyomavirus-primary-infection-high-seroprevalence-of-merkel-cell-polyomavirus-and-lymphoid-tissue-involvement
#10
Carolina Cason, Lorenzo Monasta, Nunzia Zanotta, Giuseppina Campisciano, Iva Maestri, Massimo Tommasino, Michael Pawlita, Sonia Villani, Manola Comar, Serena Delbue
Human polyomaviruses (HPyVs) asymptomatically infect the human population establishing latency in the host, and their seroprevalence can reach 90% in healthy adults. Few studies have focused on the pediatric population, and there are no reports regarding the seroprevalence of all the newly isolated HPyVs among Italian children. Therefore, we investigated the frequency of serum antibodies against 12 PyVs in 182 immunocompetent children from Northeast Italy, by means of a multiplex antibody detection system. Additionally, secondary lymphoid tissues were collected to analyze the presence of HPyV DNA sequences using a specific real-time PCRs or PCRs...
January 12, 2018: Journal of Neurovirology
https://www.readbyqxmd.com/read/29327244/antibody-based-delivery-of-tumor-necrosis-factor-l19-tnf%C3%AE-and-interleukin-2-l19-il2-to-tumor-associated-blood-vessels-has-potent-immunological-and-anticancer-activity-in-the-syngeneic-j558l-balb-c-myeloma-model
#11
Hans D Menssen, Ulf Harnack, Ulrike Erben, Dario Neri, Burkhard Hirsch, Horst Dürkop
PURPOSE: To analyze the impact of TNFα or IL2 on human lymphocytes in vitro and the anti-tumor and immune-modifying effects of L19-IL2 and L19-TNFα on subcutaneously growing J558L myeloma in immunocompetent mice. METHODS: PBMCs from three healthy volunteers were incubated with IL2, TNFα, or with IL2 plus addition of TNFα (final 20 h). BALB/c J558L mice with subcutaneous tumors were treated with intravenous L19-TNFα plus L19-IL2, or controls. Tumor growth and intra- and peri-tumoral tissues were analyzed for micro-vessel density, necrosis, immune cell composition, and PD1 or PD-L1 expressing cells...
January 11, 2018: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/29324806/immunocompetent-host-develops-mild-intestinal-inflammation-in-acute-infection-with-toxoplasma-gondii
#12
Paulo da Silva Watanabe, Aline Rosa Trevizan, Saulo Euclides Silva-Filho, Marcelo Biondaro Góis, João Luiz Garcia, Roberto Kenji Nakamura Cuman, Ana Cristina Breithaupt-Faloppa, Débora de Mello Gonçales Sant Ana, Gessilda de Alcantara Nogueira de Melo
Toxoplasma gondii (T. gondii) is the causative agent of toxoplasmosis, common zoonosis among vertebrates and high incidence worldwide. During the infection, the parasite needs to transpose the intestinal barrier to spread throughout the body, which may be a trigger for an inflammatory reaction. This work evaluated the inflammatory alterations of early T. gondii infection in peripheral blood cells, in the mesenteric microcirculation, and small intestinal tissue by measurement of MPO (myeloperoxidase) activity and NO (nitric oxide) level in rats...
2018: PloS One
https://www.readbyqxmd.com/read/29319242/clinical-diversity-of-cns-cryptococcosis
#13
J M Koshy, S Mohan, D Deodhar, M John, A Oberoi, A Pannu
Background: Though cryptococcal meningitis (CM) is recognized as a disease of the immunocompromised, studies have implicated that it also affect immunocompetent patients. Methodology: This was a cross sectional study conducted in the Department of Medicine of a tertiary teaching institution in North India. All the patients diagnosed with CM on the basis of detection of cryptococcal antigen or the presence of capsulated budding yeast cells on India ink preparation, from April 2009 to March2015 were included in the study...
October 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29318960/the-role-of-inflammation-in-epicardial-adipose-tissue-in-heart-diseases
#14
Zdenek Matloch, Anna Cinkajzlova, Milos Mraze, Martin Haluzik
Epicardial adipose tissue is not only a specific adipose tissue depot but also an active endocrine organ producing numerous substances with an important role in the development of obesity-related heart diseases. It is located between myocardium and visceral pericardium and consists predominantly of adipocytes, immunocompetent cells, ganglia and interconnecting nerve branches. Several studies documented a positive correlation between pericardial and epicardial fat and left ventricular hypertrophy and septal thickening, leading to diastolic dysfunction, electrocardiographic abnormalities and facilitating cardiac failure...
January 9, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29318554/evaluation-of-tumor-vasculature-using-a-syngeneic-tumor-model-in-wild-type-and-genetically-modified-mice
#15
Francisco Javier Rodríguez-Baena, Silvia Redondo-García, María Del Carmen Plaza-Calonge, Rubén Fernández-Rodríguez, Juan Carlos Rodríguez-Manzaneque
The relevance of tumor vasculature has been extensively recognized, and it is still the focus of numerous lines of research for basic, translational, and clinical scientists. Indeed, the knowledge of some of its regulatory mechanisms has provoked the generation of ongoing cancer therapies. Within the context of the tumor microenvironment, the information that the analysis of the vasculature provides is very valuable, and it might reveal not just its quality and the response against a specific therapy but also its close relationship with neighboring stromal and tumor players...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29316348/ultrastructural-and-immunohistochemical-study-on-the-lamina-propria-cells-beneath-paneth-cells-in-the-rat-ileum
#16
Youhei Mantani, Miho Nishida, Kyouji Yamamoto, Kazuki Miyamoto, Hideto Yuasa, Natsumi Masuda, Takuya Omotehara, Hiroki Tsuruta, Toshifumi Yokoyama, Nobuhiko Hoshi, Hiroshi Kitagawa
Paneth cells secrete bactericidal substances in response to bacterial proliferation on the mucosal surface without directly contacting bacteria. However, the induction mechanism of this transient secretion has not been clarified, although nervous system and/or immunocompetent cells in the lamina propria (LP) might be involved. In the present study, we ultrastructurally and immunohistochemically investigated which LP cells are localized beneath Paneth cells and examined the relationship between the Paneth cell-derived cellular processes which extended into the LP and the LP cells...
January 6, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29313973/mouse-model-of-post-surgical-primary-tumor-recurrence-and-regional-lymph-node-metastasis-progression-in-hpv-related-head-and-neck-cancer
#17
Maxime Mermod, Agnès Hiou-Feige, Esther Bovay, Vincent Roh, Jana Sponarova, Massimo Bongiovanni, Daniel W Vermeer, John H Lee, Tatiana V Petrova, Jean-Paul Rivals, Yan Monnier, Genrich V Tolstonog, Christian Simon
HPV-positive head and neck squamous cell carcinoma (HNSCC) is increasingly frequent. Management is particularly debated in the case of post-surgical high-risk features, i.e., positive surgical margins and extracapsular spread (ECS). In this increasingly complex emerging framework of HNSCC treatment, representative pre-clinical models are needed to support future clinical trials and advances in personalized medicine. Here, we present an immunocompetent mouse model based on the implantation of mouse tonsil epithelial HPV16-E6/E7-expressing cancer cells into the submental region of the floor-of-the-mouth...
January 4, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29311248/differential-in-vitro-cytokine-induction-by-the-species-of-cryptococcus-gattii-complex
#18
Patricia F Herkert, Jessica C Dos Santos, Ferry Hagen, Fatima Ribeiro-Dias, Flávio Queiroz-Telles, Mihai G Netea, Jacques F Meis, Leo A B Joosten
Cryptococci species are variable in capsule and cell size, thermotolerance, geographic distribution, and population affected. C. gattii sensu stricto and C. deuterogattii mainly affect immunocompetent hosts; however, C. bacillisporus, C. decagattii and C. tetragattii are mainly causing infections in immunocompromised hosts. This study aimed to compare the capacity of different species of the C. gattii species complex to induce cytokines and antimicrobial molecules in human peripheral blood mononuclear cells (PBMCs)...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29306107/leukemia-cells-impair-normal-hematopoiesis-and-induce-functionally-loss-of-hematopoietic-stem-cells-through-immune-cells-and-inflammation
#19
Ping Cui, Yuhua Zhang, Maoxiang Cui, Zhihong Li, Guang Ma, Rufeng Wang, Ning Wang, Shujuan Huang, Jie Gao
Bone marrow (BM) failure is often seen in leukemia patients, indicating an abnormal hematopoietic process. However, hematopoiesis in leukemic milieus is largely unknown. In the present study, we utilized one of the most frequent leukemogenic translocations MLL-AF9 to induce leukemia and investigated the hematopoiesis and the activity of hematopoietic stem and progenitor cells (HSPCs) in a leukemic milieu. We found that the phenotypes of the non-leukemic population in leukemic BM were drastically different than normal BM, including blockage of differentiation and a drastically reduced Lin-/Sca+/c-kit+ (LSK) population that contains all HSPCs in leukemic BM...
January 2, 2018: Leukemia Research
https://www.readbyqxmd.com/read/29302824/brucella-abortus-phosphoglyceromutase-and-dihydrodipicolinate-reductase-induce-th1-and-th2-related-immune-responses
#20
Zhiqiang Li, Hui Zhang, Jinliang Zhang, Li Xi, Guangli Yang, Shuli Wang, Qingfeng Zhou, Xiaogen Zhang, Junbo Zhang
Brucellae are intracellular bacterial pathogens that cause Brucellosis, bringing great economic burdens to developing countries. The pathogenic mechanisms of Brucella are still poorly understood. Earlier immune response plays an important role in the Brucella infection. Phosphoglyceromutase (PGM) and dihydrodipicolinate reductase (DapB) were cloned, expressed, purified, and their immunocompetence was analyzed. Cytokines were detected by murine macrophages (RAW 264.7) and splenocytes that stimulated with the two recombinant proteins...
January 4, 2018: World Journal of Microbiology & Biotechnology
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