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Clinical immunology

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https://www.readbyqxmd.com/read/28340492/hemolysis-elevated-liver-enzymes-low-platelets-syndrome-superimposed-on-hemolytic-uremic-syndrome
#1
Inês Martins, Madalena Gomes Conceição, Paulo Pereira Gomes, Nuno Clode
A pregnancy complicated by typical hemolytic uremic syndrome (HUS) and hemolysis, elevated liver enzymes, low platelets (HELLP) syndrome is reported. At 20 weeks of gestation, a case of HUS was diagnosed, with Shiga toxin-producing Escherichia coli identified. Plasmapheresis allowed continuation of the pregnancy for 5 weeks. Superimposed preeclampsia and HELLP syndrome were diagnosed after the establishment of nephrotic range proteinuria, hypertension and recurrence of hemolysis. This is a singular case, as it demonstrates that HELLP syndrome can superimpose upon HUS, a fact that can impact future research on reproductive immunology...
March 24, 2017: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/28339668/immunogenicity-of-a-booster-dose-of-quadrivalent-meningococcal-conjugate-vaccine-in-previously-immunized-hiv-infected-children-and-youth
#2
Meredith G Warshaw, George K Siberry, Paige Williams, Michael D Decker, Patrick Jean-Philippe, Jorge Lujan-Zilbermann
Background.: The US Advisory Committee on Immunization Practices recommends a booster dose of quadrivalent meningococcal conjugate vaccine (MCV4) after initial immunization for patients at high risk for meningococcal infection. Methods.: The International Maternal Pediatric Adolescents AIDS Clinical Trials (IMPAACT) P1065 trial evaluated the use of MCV4 in human immunodeficiency virus (HIV)-infected children and youth. The final step of this trial was an open-label study of an MCV4 booster dose 3...
February 18, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28334859/neurocognitive-function-of-school-aged-hiv-infected-children-in-enugu-nigeria
#3
Kenechukwu K Iloh, Ifeoma J Emodi, Ngozi S Ibeziako, Anthony N Ikefuna, Agozie C Ubesie, Ogochukwu N Iloh, Gideon C Ilechukwu, Adaeze C Ayuk
Background: Evidence has shown neurocognitive problems often exist among human immunodeficiency virus (HIV)-infected children. There are limited data for children in Nigeria. Methods: This was a cross-sectional study of 100 school-aged perinatally HIV-infected children seen in the paediatric HIV clinic and age/sex-matched controls from the general paediatric clinic. Neuro-cognitive functioning was assessed using the Raven's progressive matrices (RPM) that has been adapted for the Nigerian population...
February 20, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28333845/changes-in-the-extracellular-matrix-are-associated-with-the-development-of-serous-tubal-intraepithelial-carcinoma-into-high-grade-serous-carcinoma
#4
Sophieke C H A van der Steen, Johan Bulten, Koen K Van de Vijver, Toin H van Kuppevelt, Leon F A G Massuger
OBJECTIVE: The identification of a marker for early progression of preinvasive lesions into invasive pelvic high-grade serous carcinoma (HGSC) may provide novel handles for innovative screening and prevention strategies. The interplay between cancer cells and the extracellular matrix (ECM) is one of the main principles in cancer development and growth, but has been largely neglected in preinvasive lesions. This is the first study addressing the involvement of the ECM in the "step-by-step" transition of normal fallopian tube epithelium into preinvasive lesions, and eventually the progression of preinvasive lesions into invasive HGSC...
March 23, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28333360/gammadelta-t-cells-in-crohn-s-disease-a-new-player-in-the-disease-pathogenesis
#5
Catalan-Serra Ignacio, Arne Kristian Sandvik, Torunn Bruland, Juan Carlos Andreu-Ballester
Crohn's disease (CD) is a chronic relapsing systemic disease affecting the gastrointestinal tract. An altered immune response to commensal intestinal bacteria takes place in genetically predisposed individuals, resulting in chronic inflammation in the gut. Several alterations in the innate immunity mechanisms have been described in recent years. Thus, the study of the immunological aspects of CD, specifically the role of lymphocytes, is a key element for understanding the pathogenesis of the disease. Gammadelta T cells (γδ T cells) constitute only a small proportion of the lymphocytes that circulate in the blood and peripheral organs and they are present mainly in the epithelia, where they can constitute up to 40% of intraepithelial lymphocytes (IEL) in the intestinal mucosa...
March 16, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28331999/the-acidic-microenvironment-as-a-possible-niche-of-dormant-tumor-cells
#6
REVIEW
Silvia Peppicelli, Elena Andreucci, Jessica Ruzzolini, Anna Laurenzana, Francesca Margheri, Gabriella Fibbi, Mario Del Rosso, Francesca Bianchini, Lido Calorini
Although surgical excision, chemo-, and radio-therapy are clearly advanced, tumors may relapse due to cells of the so-called "minimal residual disease". Indeed, small clusters of tumor cells persist in host tissues after treatment of the primary tumor elaborating strategies to survive and escape from immunological attacks before their relapse: this variable period of remission is known as "cancer dormancy". Therefore, it is crucial to understand and consider the major concepts addressing dormancy, to identify new targets and disclose potential clinical strategies...
March 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28331857/thrombosis-neuroinflammation-and-poststroke-infection-the-multifaceted-role-of-neutrophils-in-stroke
#7
REVIEW
Johanna Ruhnau, Juliane Schulze, Alexander Dressel, Antje Vogelgesang
Immune cells can significantly predict and affect the clinical outcome of stroke. In particular, the neutrophil-to-lymphocyte ratio was shown to predict hemorrhagic transformation and the clinical outcome of stroke; however, the immunological mechanisms underlying these effects are poorly understood. Neutrophils are the first cells to invade injured tissue following focal brain ischemia. In these conditions, their proinflammatory properties enhance tissue damage and may promote ischemic incidences by inducing thrombus formation...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28329346/posttreatment-reactions-after-single-dose-diethylcarbamazine-or-ivermectin-in-subjects-with-loa-loa-infection
#8
Jesica A Herrick, Fanny Legrand, Raceline Gounoue, Godwin Nchinda, Céline Montavon, Jean Bopda, Steve Mbickmen Tchana, Bienvenu Etogo Ondigui, Konrad Nguluwe, Michael P Fay, Michelle Makiya, Simon Metenou, Thomas B Nutman, Joseph Kamgno, Amy D Klion
Background.: Severe adverse reactions have been observed in individuals with Loa loa infection treated with either diethylcarbamazine (DEC), the drug of choice for loiasis, or ivermectin (IVM), which is used in mass drug administration programs for control of onchocerciasis and lymphatic filariasis in Africa. In this study, posttreatment clinical and immunologic reactions were compared following single-dose therapy with DEC or IVM to assess whether these reactions have the same underlying pathophysiology...
March 13, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28329310/immunologic-pathways-that-predict-mortality-in-hiv-infected-ugandans-initiating-art
#9
Sulggi Lee, Helen Byakwaga, Yap Boum, Tricia H Burdo, Kenneth C Williams, Michael M Lederman, Yong Huang, Russell P Tracy, Huyen Cao, Jessica E Haberer, Annet Kembabazi, David R Bangsberg, Jeffrey N Martin, Peter W Hunt
Plasma kynurenine/tryptophan (KT) ratio, a marker of adaptive immune defects, strongly predicts mortality during treated HIV disease in Ugandans compared to U.S.-based populations, Here, KT ratio, and T cell and plasma biomarkers of immune activation were measured among 535 HIV-infected Ugandans prior to ART initiation and at month 6 of viral suppression. Month 6 KT ratio (aHR=2.74), sCD14 (aHR=2.32), IL-6 (aHR=2.34), and D dimer (aHR=1.95) were associated with mortality occurring ≥6 months after ART initiation, KT ratio remained significantly predictive of mortality even after adjustment for the additional biomarkers, suggesting an independent contribution to clinical outcomes in resource-limited settings...
March 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28329119/stratification-of-latent-tuberculosis-infection-by-cellular-immune-profiling
#10
Alice Halliday, Hilary Whitworth, Sherine Hermagild Kottoor, Umar Niazi, Sarah Menzies, Heinke Kunst, Samuel Bremang, Amarjit Badhan, Peter Beverley, Onn Min Kon, Ajit Lalvani
Background: Recently-acquired and remotely-acquired latent tuberculosis (TB) infection (LTBI) are clinically indistinguishable, yet recent acquisition of infection is the greatest risk factor for progression to active TB (ATB) in immunocompetent individuals. We aimed to evaluate the ability of cellular immune signatures which differ between ATB and LTBI, to distinguish recently from remotely acquired LTBI. Methods: Fifty-nine individuals were recruited: ATB (n=20); recent LTBI (n=19); remote LTBI (n=20)...
February 28, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28329080/differences-in-immunologic-factors-among-patients-presenting-with-altered-mental-status-during-cryptococcal-meningitis
#11
Sarah Lofgren, Kathy H Hullsiek, Bozena M Morawski, Henry W Nabeta, Reuben Kiggundu, Kabanda Taseera, Abdu Musubire, Charlotte Schutz, Mahsa Abassi, Nathan C Bahr, Lillian Tugume, Conrad Muzoora, Darlisha A Williams, Melissa A Rolfes, Sruti S Velamakanni, Radha Rajasingham, Graeme Meintjes, Joshua Rhein, David B Meya, David R Boulware
Altered mental status in cryptococcal meningitis results in poorer survival, but underlying causes of altered mentation are poorly understood. Within two clinical trials, we assessed risk factors for altered mental status (GCS score<15) considering baseline clinical characteristics, CSF cytokines/chemokines, and antiretroviral therapy. Among 326 enrolled participants, 97 (30%) had GCS<15 and these patients had lower median CSF cryptococcal antigen titers (P=0.042) and CCL2 (P=0.005) but higher opening pressures (320 vs...
January 30, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28328655/vascularized-composite-allotransplantation-an-emerging-concept-for-burn-reconstruction
#12
Zhi Yang Ng, Alexandre G Lellouch, Tessa Drijkoningen, Irene A Chang, David H Sachs, Curtis L Cetrulo
Vascularized composite allotransplantation (VCA) has demonstrated utility in the reconstruction of extensive soft-tissue defects following severe burns. However, pre-VCA events such as multiple transfusions, previous transplantation and pregnancies, the use of skin allografts, and mechanical support devices may result in sensitization and ultimately exclude a burn patient, who may benefit most through VCA, from a hand or face transplant. The authors sought to identify the immunologic challenges involved. All reported VCA cases up to July 2016 were reviewed...
March 15, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28328551/higher-body-mass-index-is-associated-with-greater-proportions-of-effector-cd8-t-cells-expressing-cd57-in-women-living-with-hiv
#13
Michael J A Reid, Sanjiv M Baxi, Lila A Sheira, Alan L Landay, Edward A Frongillo, Adebola Adedimeji, Mardge H Cohen, Eryka Wentz, Deborah R Gustafson, Daniel Merenstein, Peter W Hunt, Phyllis C Tien, Sheri D Weiser
BACKGROUND: A low proportion of CD28-CD8+ T cells that express CD57 is associated with increased mortality in HIV infection. The effect of increasing BMI changes in the proportion of CD57+CD28-CD8+ T cells among HIV-infected individuals on ART is unknown. SETTING: In a U.S. cohort of HIV-infected women, we evaluated associations of BMI and waist circumference with 3 distinct CD8+ T cell phenotypes: % CD28-CD57+CD8+ T cells, % CD57+ of CD28-CD8+ T cells and % CD28- of all CD8 T cells...
March 20, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28327786/polymorphisms-in-genes-tlr1-2-and-4-are-associated-with-differential-cytokine-and-chemokine-serum-production-in-patients-with-leprosy
#14
Nadja de Lima Santana, Jamile Leão Rêgo, Joyce Moura Oliveira, Lucas Frederico de Almeida, Marcos Braz, Lídia Maria Medeiros Machado, Paulo Roberto Lima Machado, Léa Cristina Castellucci
BACKGROUND: Leprosy or hansen's disease is a spectral disease whose clinical forms mostly depends on host's immune and genetic factors. Different Toll-like receptors (TLR) variants have been described associated with leprosy, but with some lack of replication across different populations. OBJECTIVES: To evaluate the role of polymorphisms in genes TLR1, TLR2 and TLR4 and susceptibility to leprosy in a genetic case control study; to verify the association between genotypes of these markers and the immunological profile in the serum of patients with leprosy...
April 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28327412/response-of-inos-and-its-relationship-with-il-22-and-stat3-in-macrophage-activity-in-the-polar-forms-of-leprosy
#15
Jorge Rodrigues de Sousa, Raphael Primo Martins de Sousa, Tinara Leila de Souza Aarão, Leonidas Braga Dias, Francisca Regina Oliveira Carneiro, Juarez Antonio Simões Quaresma
Leprosy is a chronic granulomatous infection that manifests as different clinical forms related to the immunological response. The aim of the study was to evaluated the response of IL-22, STAT3, CD68 and iNOS in leprosy skin lesions. The mean number IL-22 positive cells was 12.12±1.90 cells/field in the TT form and 31.31±2.91 cells/field in the LL form. STAT3 positive cells was 5.29±1.96 cells/field in the TT form, while this number was 11.13±3.48 cells/field in the LL form. The mean number of CD68 positive cells was 25...
March 18, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28326980/gene-sequence-analyses-of-the-healthy-oral-microbiome-in-humans-and-companion-animals
#16
Eric M Davis
It has long been accepted that certain oral bacterial species are responsible for the development of periodontal disease. However, the focus of microbial and immunological research is shifting from studying the organisms associated with disease to examining the indigenous microbial inhabitants that are present in health. Microbiome refers to the aggregate genetic material of all microorganisms living in, or on, a defined habitat. Recent developments in gene sequence analysis have enabled detection and identification of bacteria from polymicrobial samples, including subgingival plaque...
June 2016: Journal of Veterinary Dentistry
https://www.readbyqxmd.com/read/28326908/sublingual-immunotherapy-tablets-as-a-disease-modifying-add-on-treatment-option-to-pharmacotherapy-for-allergic-rhinitis-and-asthma
#17
Stephen Brunton, Harold S Nelson, David I Bernstein, Simon Lawton, Susan Lu, Hendrik Nolte
Allergic rhinitis (AR) with or without conjunctivitis (AR/C) is associated with a significant health and economic burden, and is often accompanied by asthma. Pharmacotherapies are the mainstay treatment options for AR and asthma, but guidelines also recommend allergy immunotherapy (AIT). Unlike pharmacotherapies, AIT has the ability to modify the underlying immunologic mechanisms of AR and asthma with the potential for long-term benefits after treatment is discontinued. Immunotherapy may also prevent progression of AR/C to asthma...
March 22, 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/28326082/neonatal-group-b-streptococcal-disease-in-otherwise-healthy-infants-failure-of-specific-neonatal-immune-responses
#18
Alessandro Borghesi, Mauro Stronati, Jacques Fellay
Only a small proportion of newborn infants exposed to a pathogenic microorganism develop overt infection. Susceptibility to infection in preterm infants and infants with known comorbidities has a likely multifactorial origin and can be often attributed to the concurrence of iatrogenic factors, environmental determinants, underlying pathogenic processes, and probably genetic predisposition. Conversely, infection occurring in otherwise healthy full-term newborn infants is unexplained in most cases. Microbial virulence factors and the unique characteristics of the neonatal immune system only partially account for the interindividual variability in the neonatal immune responses to pathogens...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28325210/breast-cancer-immunology-and-immunotherapy-current-status-and-future-perspectives
#19
L de la Cruz-Merino, M Chiesa, R Caballero, F Rojo, N Palazón, F H Carrasco, V Sánchez-Margalet
Cancer immunology has gained renewed interest in the past few years due to emerging findings on mechanisms involved in tumoral immune evasion. Indisputably, immune edition is currently considered a critical hallmark of cancer. Basic research has revealed new targets which can be modulated in the clinical setting with new compounds and strategies. As recent evidence confirms, breast cancer (BC) is a complex and heterogeneous disease in which host immune responses play a substantial role. T-infiltrating lymphocytes measurement is suggested as a powerful new tool necessary to predict early BC evolution, especially in HER2-positive and triple negative subtypes...
2017: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/28323897/hcv-coinfection-contributes-to-hiv-pathogenesis-by-increasing-immune-exhaustion-in-cd8-t-cells
#20
Norma Rallón, Marcial García, Javier García-Samaniego, Noelia Rodríguez, Alfonso Cabello, Clara Restrepo, Beatriz Álvarez, Rosa García, Miguel Górgolas, José M Benito
BACKGROUND: There are several contributors to HIV-pathogenesis or insufficient control of the infection. However, whether HIV/HCV-coinfected population exhibits worst evolution of HIV-pathogenesis remains unclear. Recently, some markers of immune exhaustion have been proposed as preferentially upregulated on T-cells during HIV-infection. Herein, we have analyzed T-cell exhaustion together with several other contributors to HIV-pathogenesis that could be affected by HCV-coinfection. PATIENTS AND METHODS: Ninety-six patients with chronic HIV-infection (60 HIV-monoinfected and 36 HIV/HCV-coinfected), and 20 healthy controls were included in the study...
2017: PloS One
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