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M A Nosenko, M S Drutskaya, M M Moisenovich, S A Nedospasov
This review addresses the issue of bioengineering of artificial lymphoid organs.Progress in this field may help to better understand the nature of the structure-function relations that exist in immune organs. Artifical lymphoid organs may also be advantageous in the therapy or correction of immunodefficiencies, autoimmune diseases, and cancer. The structural organization, development, and function of lymphoid tissue are analyzed with a focus on the role of intercellular contacts and on the cytokine signaling pathways regulating these processes...
April 2016: Acta Naturae
Fatih Kabakaş, Meriç Uğurlar, Derya Bayirli Turan, Nebil Yeşiloğlu, Berkan Mersa, İsmail Bülent Özçelik
The treatment of flexor tenosynovitis in the hand and wrist due to tuberculosis is controversial. Although some authors recommend the antituberculous chemotherapy, the others recommend the surgical treatment. In this article, 12 patients with synovial tuberculosis of the flexor aspect of the hand and the wrist were evaluated with respect to diagnosis and treatment modalities. None of the patients had a history of tuberculosis, concomitant disease, immunosuppressive drug use, drug abuse, and human immunodefficiency virus positivity...
August 2016: Annals of Plastic Surgery
Manuel Ramos-Casals, Pilar Brito-Zerón, Belchin Kostov, Antoni Sisó-Almirall, Xavier Bosch, David Buss, Antoni Trilla, John H Stone, Munther A Khamashta, Yehuda Shoenfeld
Systemic autoimmune diseases (SADs) are a significant cause of morbidity and mortality worldwide, although their epidemiological profile varies significantly country by country. We explored the potential of the Google search engine to collect and merge large series (>1000 patients) of SADs reported in the Pubmed library, with the aim of obtaining a high-definition geoepidemiological picture of each disease. We collected data from 394,827 patients with SADs. Analysis showed a predominance of medical vs. administrative databases (74% vs...
August 2015: Autoimmunity Reviews
Meital Abayev, Adi Moseri, Oren Tchaicheeyan, Naama Kessler, Boris Arshava, Fred Naider, Tali Scherf, Jacob Anglister
UNLABELLED: C-C chemokine receptor 5 (CCR5) serves as a co-receptor for HIV-1. The CCR5 N-terminal segment, the second extracellular loop (ECL2) and the transmembrane helices have been implicated in binding the envelope glycoprotein gp120. Peptides corresponding to the sequence of the putative ECL2 as well as peptides containing extracellular loops 1 and 3 (ECL1 and ECL3) were found to inhibit HIV-1 infection. The aromatic residues in the C-terminal half of an ECL2 peptide were shown to interact with gp120...
May 2015: FEBS Journal
Jong Ryeol Eun, Yong Jin Jung, Yanling Zhang, Yanhong Zhang, Benjamin Tschudy-Seney, Rajen Ramsamooj, Yu-Jui Yvonne Wan, Neil D Theise, Mark A Zern, Yuyou Duan
BACKGROUND: SK Hep-1 cells (SK cells) derived from a patient with liver adenocarcinoma have been considered a human hepatoma cell line with mesenchymal origin characteristics, however, SK cells do not express liver genes and exhibit liver function, thus, we hypothesized whether mesenchymal cells might contribute to human liver primary cancers. Here, we characterized SK cells and its tumourigenicity. METHODS AND PRINCIPAL FINDINGS: We found that classical mesenchymal stem cell (MSC) markers were presented on SK cells, but endothelial marker CD31, hematopoietic markers CD34 and CD45 were negative...
2014: PloS One
Patricia María O'Farrill-Romanillos, Lucy Vania Galindo-Pacheco, Adela Sisy Amaya-Mejía, Freya Helena Campos-Romero, Laura Dafne Mendoza-Reyna, Fernando Pérez-Rocha, Nora Hilda Segura-Méndez
BACKGROUND: Common variable immunodeficiency is a primary immunodeficiency, in which from 70 to 80 % of patients have tumors and 25 % of cases are associated with autoimmune diseases. Common variable immunodeficiency patients have a higher incidence of neoplasms, with a risk 12-18 times higher than the general population. There are few cases of common variable immunodeficiency patients with leukemia. CLINICAL CASE: Female of 36 years old, with left upper quadrant pain, early satiety, weight loss of 8 kg in three months and splenomegaly...
January 2014: Revista Médica del Instituto Mexicano del Seguro Social
Kathleen G Neiva, Kristy A Warner, Marcia S Campos, Zhaocheng Zhang, Juliana Moren, Theodora E Danciu, Jacques E Nör
BACKGROUND: Endothelial cells play a complex role in the pathobiology of cancer. This role is not limited to the making of blood vessels to allow for influx of oxygen and nutrients required for the high metabolic demands of tumor cells. Indeed, it has been recently shown that tumor-associated endothelial cells secrete molecules that enhance tumor cell survival and cancer stem cell self-renewal. The hypothesis underlying this work is that specific disruption of endothelial cell-initiated signaling inhibits tumor growth...
2014: BMC Cancer
Zhihong Dong, Atsushi Imai, Sudha Krishnamurthy, Zhaocheng Zhang, Benjamin D Zeitlin, Jacques E Nör
Recent evidence demonstrated that endothelial cells initiate signaling events that enhance tumor cell survival, proliferation, invasion, and tumor recurrence. Under this new paradigm for cellular crosstalk within the tumor microenvironment, the origin of endothelial cells and tumor cells may have a direct impact on the pathobiology of cancer. The purpose of this pilot study was to evaluate the effect of endothelial cell species (i.e. murine or human) on xenograft tumor growth and response to therapy. Tumor xenografts vascularized either with human or with murine microvascular endothelial cells were engineered, side-by-side, subcutaneously in the dorsum of immunodefficient mice...
2013: PloS One
D Reyes, C Ballaré, G Castellano, D Soronellas, J R Bagó, J Blanco, M Beato
Growth of breast cancers is often dependent on ovarian steroid hormones making the tumors responsive to antagonists of hormone receptors. However, eventually the tumors become hormone independent, raising the need to identify downstream targets for the inhibition of tumor growth. One possibility is to focus on the signaling mechanisms used by ovarian steroid hormones to induce breast cancer cell proliferation. Here we report that the mitogen- and stress-activated kinase 1 (MSK1) could be a potential druggable target...
March 20, 2014: Oncogene
Concha de la Fuente, Carmen Hinojosa, Isabel Gilabert, Maria Ángeles Jiménez Sousa, Jose Manuel González, Raúl Ortiz de Lejarazu, Ana Loma, Concepción Nieto, Rosa Arnaiz, Jesús F Bermejo-Martin
Hepatitis C virus (HCV)/human immunodefficiency virus (HIV) coinfection is a major health problem, affecting mostly to individuals with exposure to blood products, as hemophiliacs or intravenous drug users, or those exposed to high-risk sexual practices. Genotyping of interleukin 28B (IL-28B) rs12979860 polymorphism is a useful tool for guiding therapeutic decisions in this disease. On the contrary, there is not enough information on the pathogenic role of this polymorphism in the natural history of the disease...
January 2013: Journal of Interferon & Cytokine Research
Vildan Cağlayan, Oznur Ak, Gül Dabak, Ebru Damadoğlu, Banu Ketenci, Müge Ozdemir, Serdar Ozer, Attila Saygı
The purpose of this prospective, cross-sectional observational study was to compare the tuberculin skin testing (TST) with QuantiFERON-TB Gold-In Tube (QTF-GIT) for the detection of latent tuberculosis infection in healthcare workers (HCWs). The study included 78 volunteers who are HCWs at the same tertiary care teaching hospital for chest diseases and tuberculosis. Participants with active tuberculosis, immunodefficiency or malnutrition were not included. The TST was administered by the Mantoux method. Peptides representing ESAT-6, CFP-10 and TB7-7 were used as TB-specific antigens in the whole-blood Interferon-gamma (IFN-g) assay (QTF-GIT)...
2011: Tüberküloz Ve Toraks
Flavio F Demarco, Luciano Casagrande, Zhaocheng Zhang, Zhihong Dong, Sandra B Tarquinio, Benjamin D Zeitlin, Songtao Shi, Anthony J Smith, Jacques E Nör
INTRODUCTION: Dental pulp tissue engineering is an emerging field that can potentially have a major impact on oral health. However, the source of morphogens required for stem cell differentiation into odontoblasts and the scaffold characteristics that are more conducive to odontoblastic differentiation are still unclear. This study investigated the effect of dentin and scaffold porogen on the differentiation of human dental pulp stem cells (DPSCs) into odontoblasts. METHODS: Poly-L-lactic acid (PLLA) scaffolds were prepared in pulp chambers of extracted human third molars using salt crystals or gelatin spheres as porogen...
November 2010: Journal of Endodontics
Wojciech Ardelt, Barbara Ardelt, Zbigniew Darzynkiewicz
Antitumor ribonucleases are small (10-28 kDa) basic proteins. They were found among members of both, ribonuclease A and T1 superfamilies. Their cytotoxic properties are conferred by enzymatic activity, i.e., the ability to catalyze cleavages of phosphodiester bonds in RNA. They bind to negatively charged cell membrane, enter cells by endocytosis and translocate to cytosol where they evade mammalian protein ribonuclease inhibitor and degrade RNA. Here, we discuss structures, functions and mechanisms of antitumor activity of several cytotoxic ribonucleases with particular emphasis to the amphibian Onconase, the only enzyme of this class that reached clinical trials...
December 25, 2009: European Journal of Pharmacology
Andrea P Rodriguez, Hidetsugu Tsujigiwa, Mehmet Gunduz, Beyhan Cengiz, Noriyuki Nagai, Ryo Tamamura, Silvia S Borkosky, Tohru Takagi, Miho Inoue, Hitoshi Nagatsuka
Progenitor cells play an important biological role in tooth and bone formation, and previous analyses during bone and dentine induction have indicated that they may be a good alternative for tissue engineering. Thus, to clarify the influence of the microenvironment on protein and gene expression, MDPC-23 cells (mouse dental papilla cell line) and KUSA/A1 cells (bone marrow stromal cell line) were used, both in vitro cell culture and in intra-abdominal diffusion chambers implanted in 4-week-old male immunodefficient mice (SCID mice)...
April 2009: Biocell: Official Journal of the Sociedades Latinoamericanas de Microscopía Electronica ... Et. Al
Na Li, Peihui Lin, Chuanxi Cai, Zui Pan, Noah Weisleder, Jianjie Ma
During apoptosis, proteolytic cleavage of Bax at the amino terminus generates a truncated Bax of approximately 18 kDa (p18Bax) and an amino-terminal peptide of approximately 3 kDa (p3Bax). Whereas extensive studies have shown that p18Bax behaves like a BH3 protein with enhanced pro-apoptotic function over that of the full-length Bax (p21Bax), little is known about the function of p3Bax in apoptosis. We have previously shown that Bax and Ca2+ play a synergistic role in amplifying apoptosis signaling and that store-operated Ca2+ entry (SOCE) contributes to Bax-mediated apoptosis in prostate cancer cells...
February 2009: American Journal of Physiology. Cell Physiology
Ana Luiza Werneck-Silva, Ivete Bedin Prado
BACKGROUND AND AIM: Dyspeptic symptoms are frequently reported by human immunodefficiency virus (HIV)-infected patients under highly active antiretroviral therapy. Whether opportunistic infections are a cause of dyspepsia is still unknown. In this study we prospectively compare the prevalence of gastrointestinal opportunistic infections in dyspeptic versus non-dyspeptic HIV-infected patients with advanced immunodeficiency. PATIENTS AND METHODS: Six hundred and ninety HIV-infected patients under highly active antiretroviral therapy underwent esophagogastroduodenoscopy with mucosal biopsies from the stomach and duodenum...
January 2009: Journal of Gastroenterology and Hepatology
Hanaa Hasan Banjar
OBJECTIVE: This study represents the experience of a tertiary care center in Saudi Arabia on non-cystic fibrosis bronchiectasis. METHODS: A retrospective review of all patients with confirmed Non-Cystic Fibrosis (Non-CF) bronchiectasis by chest X-ray and or CT chest in a pulmonary clinic for the period 1993-2005 at a tertiary care center in Riyadh. RESULTS: A0 total of 151 cases were diagnosed as Non-CF bronchiectasis. Siventy-five (49.7%) were males, 76(50...
February 2007: Indian Journal of Pediatrics
J Gutiérrez Dubois, J L Alonso Martínez, M T Alvarez Frías, M L Abínzano Guillén, L Munuera García, M Solano Remírez
Pulmonary infection due to Nocardia sp. is an infrequent disease that affects principally to immunodefficient patients although it can be also seen in patients with normal immunity. Diagnosis is based in isolation of micro-organism in respiratory samples while clinical presentation and radiology are non specific. Treatment is made with trimethropim-sulfametoxazole (TMP/SMX), though resistance has developed in some patients. The recommended length of treatment is 6 weeks to 12 months depending on the immunitaly status...
November 2006: Anales de Medicina Interna: Organo Oficial de la Sociedad Española de Medicina Interna
Henry C Tuckwell, Frederic Y M Wan
We consider simple mathematical models for the early population dynamics of the human immunodefficiency type 1 virus (HIV-1). Although these systems of differential equations may be solved by numerical methods, few general theoretical results are available due to nonlinearities. We analyze a model whose components are plasma densities of uninfected CD4+ T-cells and infected cells (assumed in this model to be proportional to virion density). In addition to analyzing the nature of the equilibrium points, we show that there are no periodic or limit-cycle solutions...
March 2004: Bio Systems
(no author information available yet)
Recent development of tuberculosis in Japan tends to converge on a specific high risk group. The proportion of tuberculosis developing particularly from the compromised hosts in the high risk group is especially high. At this symposium, therefore, we took up diabetes mellitus, gastrectomy, dialysis, AIDS and the elderly for discussion. Many new findings and useful reports for practical medical treatment are submitted; why these compromised hosts are predisposed to tuberculosis, tuberculosis diagnostic and remedial notes of those compromised hosts etc...
November 2003: Kekkaku: [Tuberculosis]
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