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https://www.readbyqxmd.com/read/27909435/immune-reconstitution-after-allogeneic-hematopoietic-stem-cell-transplantation
#1
REVIEW
Justyna Ogonek, Mateja Kralj Juric, Sakhila Ghimire, Pavankumar Reddy Varanasi, Ernst Holler, Hildegard Greinix, Eva Weissinger
The timely reconstitution and regain of function of a donor-derived immune system is of utmost importance for the recovery and long-term survival of patients after allogeneic hematopoietic stem cell transplantation (HSCT). Of note, new developments such as umbilical cord blood or haploidentical grafts were associated with prolonged immunodeficiency due to delayed immune reconstitution, raising the need for better understanding and enhancing the process of immune reconstitution and finding strategies to further optimize these transplant procedures...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27906037/integrated-therapy-for-hiv-and-cryptococcosis
#2
REVIEW
Sirawat Srichatrapimuk, Somnuek Sungkanuparph
Cryptococcosis has been one of the most common opportunistic infections and causes of mortality among HIV-infected patients, especially in resource-limited countries. Cryptococcal meningitis is the most common form of cryptococcosis. Laboratory diagnosis of cryptococcosis includes direct microscopic examination, isolation of Cryptococcus from a clinical specimen, and detection of cryptococcal antigen. Without appropriate treatment, cryptococcosis is fatal. Early diagnosis and treatment is the key to treatment success...
November 29, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27906009/current-trends-and-intricacies-in-the-management-of-hiv-associated-pulmonary-tuberculosis
#3
REVIEW
Narendran Gopalan, Padmapriyadarsini Chandrasekaran, Soumya Swaminathan, Srikanth Tripathy
Human immunodeficiency virus (HIV) epidemic has undoubtedly increased the incidence of tuberculosis (TB) globally, posing a formidable global health challenge affecting 1.2 million cases. Pulmonary TB assumes utmost significance in the programmatic perspective as it is readily transmissible as well as easily diagnosable. HIV complicates every aspect of pulmonary tuberculosis from diagnosis to treatment, demanding a different approach to effectively tackle both the diseases. In order to control these converging epidemics, it is important to diagnose early, initiate appropriate therapy for both infections, prevent transmission and administer preventive therapy...
September 26, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27906006/integrated-therapy-for-hiv-and-tuberculosis
#4
REVIEW
Weerawat Manosuthi, Surasak Wiboonchutikul, Somnuek Sungkanuparph
Tuberculosis (TB) has been the most common opportunistic infection and cause of mortality among HIV-infected patients, especially in resource-limited countries. Clinical manifestations of TB vary and depend on the degree of immunodeficiency. Sputum microscopy and culture with drug-susceptibility testing are recommended as a standard method for diagnosing active TB. TB-related mortality in HIV-infected patients is high especially during the first few months of treatment. Integrated therapy of both HIV and TB is feasible and efficient to control the diseases and yield better survival...
May 12, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27904816/an-unusual-presentation-of-nocardiosis-in-an-allogeneic-transplant-recipient
#5
Uroosa Ibrahim, Amina Saqib, Farhan Mohammad, Terenig Terjanian
Nocardiosis is a rare cause of opportunistic infection post hematopoietic stem cell transplant (HSCT) occurring in about 0.3% of patients. The risk factors include delayed immune reconstitution, prolonged neutropenia, and graft-versus-host disease. The most common site of infection is the lung, followed by the brain and the skin. Concomitant pulmonary and central nervous system (CNS) nocardiosis is an extremely rare entity as presented in our case. We present the case of a 72-year-old male at 137 days post transplant presenting with complaints of headache and slurred speech...
October 17, 2016: Curēus
https://www.readbyqxmd.com/read/27904430/natalizumab-related-progressive-multifocal-leukoencephalopathy-immune-reconstitution-inflammatory-syndrome-a-case-report-highlighting-clinical-and-mri-features
#6
Bela Purohit, Eranga Ganewatte, Spyros S Kollias
Multiple sclerosis (MS) patients treated with natalizumab often face the uncommon but severe complication of developing progressive multifocal leukoencephalopathy (PML). PML may be further complicated by immune reconstitution inflammatory syndrome (IRIS) after the removal of the drug. Since both PML and IRIS are associated with high morbidity and mortality rates, early clinical and radiological diagnosis of these complications is of paramount importance. Here, we report a case of an adult male patient who was diagnosed with PML after receiving natalizumab therapy for 6 years for the treatment of MS...
September 2016: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/27903841/influence-of-a-moderate-intensity-exercise-program-on-early-nk-cell-immune-recovery-in-pediatric-patients-after-reduced-intensity-hematopoietic-stem-cell-transplantation
#7
Carolina Chamorro-Viña, Jaime Valentín, Lucía Fernández, Marta González-Vicent, Margarita Pérez-Ruiz, Alejandro Lucía, S Nicole Culos-Reed, Miguel Ángel Díaz, Antonio Pérez-Martínez
INTRODUCTION: After allogeneic hematopoietic stem cell transplantation (HSCT), NK cell reconstitution, which is crucial for positive outcomes, is dominated by the CD56(bright) subset with low NK cell cytotoxicity (NKCC) activity. Moderate exercise has been described as a potent NK cell stimulus in adults with cancer. PURPOSE: To determine the effects of a moderate-intensity exercise program on NK cell recovery early after HSCT and the feasibility of this intervention...
November 30, 2016: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/27902351/protective-role-of-cx3cr1-signaling-in-resident-cells-of-the-central-nervous-system-during-experimental-herpes-simplex-virus-encephalitis
#8
Rafik Menasria, Coraline Canivet, Jocelyne Piret, Jean Gosselin, Guy Boivin
CX3CR1 is an important chemokine receptor expressed on the surface of microglia and blood leukocytes including monocytes. Signaling through this receptor influences the immune activity of microglia and monocytes trafficking into the central nervous system (CNS) in several neurological diseases. During experimental herpes simplex virus 1 (HSV-1) encephalitis (HSE), CX3CR1 deficiency has been reported to exacerbate the outcome of the disease. However, the precise contribution of CX3CR1 expressed in resident cells of the CNS or peripheral monocytes in protection against HSE remains unclear...
November 30, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27898686/gut-homing-cd4-and-cd8-t-cell-frequencies-in-hiv-infected-individuals-on-antiretroviral-treatment
#9
Olivia Briceño, Sandra Pinto-Cardoso, Nataly Rodríguez-Bernabe, Akio Murakami-Ogasawara, Gustavo Reyes-Terán
The depletion of mucosal CD4+ T-cells occurs early in HIV infection and despite years on antiretroviral treatment (ART), this population never reconstitutes to pre-HIV infection levels. In an effort to understand the effect of ART initiation and different ART regimens on the reconstitution of mucosal T cells within the gut associated lymphoid tissue (GALT), we quantified the frequency of CD4+ and CD8+ T cells expressing the gut homing receptors CCR9 and β7 in peripheral blood (PB) of HIV infected individuals naive to ART and treated individuals on both short-term (less than a year) and long-term ART (more than 2 years)...
2016: PloS One
https://www.readbyqxmd.com/read/27893617/differential-role-of-b-cells-and-il-17-versus-ifn-%C3%AE-during-early-and-late-rejection-of-pig-islet-xenografts-in-mice
#10
Hee Kap Kang, Shusen Wang, Anil Dangi, Xiaomin Zhang, Amar Singh, Lei Zhang, James M Rosati, Wilma Suarez-Pinzon, Xuelian Deng, Xiaoyan Chen, Edward B Thorp, Bernhard J Hering, Stephen D Miller, Xunrong Luo
BACKGROUND: Xenogeneic islet transplantation is an emerging therapeutic option for diabetic patients. However, immunological tolerance to xenogeneic islets remains a challenge. METHODS: The current study used a pig-to-mouse discordant xenogeneic islet transplant model to examine anti-donor xenogeneic immune responses during early and late rejection, and to determine experimental therapeutic interventions that promote durable pig islet xenograft survival. RESULTS: We found that during early acute rejection of pig islet xenografts, the rejecting hosts exhibited a heavy graft infiltration with B220 B cells and a robust anti-pig antibody production...
November 23, 2016: Transplantation
https://www.readbyqxmd.com/read/27891589/critical-roles-of-conventional-dendritic-cells-in-promoting-t-cell-dependent-hepatitis-through-regulating-nkt-cells
#11
Jingya Wang, Xueting Cao, Jiliang Zhao, Huiyuan Zhao, Jun Wei, Qiuying Li, Xiaofei Qi, Zishan Yang, Li Wang, Hongru Zhang, Li Bai, Zhenzhou Wu, Liqing Zhao, Zhangyong Hong, Zhinan Yin
Dendritic cells (DC) play critical roles in initiating and regulating the innate immunity as well as the adaptive immune responses. However, the role of conventional dendritic cells (cDC) in Con A-induced fulminant hepatitis is unknown. In this study, we demonstrated that depletion of cDC using either CD11c-DTR Tg mice or anti-CD11c antibody significantly reduced the severity of liver injury, indicating a detrimental role of cDC in Con A-induced hepatitis. We further elucidated the pathological role of cDC through being the critical source of IL-12, which induced the secretion of IFN-γ by NKT cells...
November 28, 2016: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/27888015/early-and-long-term-impaired-t-lymphocyte-immune-reconstitution-after-cord-blood-transplantation-with-antithymocyte-globulin
#12
Nerea Castillo, Irene García-Cadenas, Pere Barba, Carme Canals, Cristina Díaz-Heredia, Rodrigo Martino, Christelle Ferrà, Isabel Badell, Izaskun Elorza, Jorge Sierra, David Valcárcel, Sergio Querol
Immune reconstitution is crucial to the success of allogeneic hematopoietic stem cell transplantation. Umbilical cord blood transplantation (UCBT) has been associated with delayed immune reconstitution. We characterized the kinetics and investigated the risk variables affecting the main lymphocyte subsets recovery in 225 consecutive pediatric and adult patients [males, n=126, median age=15, range 0.3-60, interquartile range, 4-35] who underwent myeloablative single-UCBT between 2005 and 2015 for malignant and non-malignant disorders...
November 22, 2016: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/27886201/cryptococcal-meningitis-epidemiology-immunology-diagnosis-and-therapy
#13
REVIEW
Peter R Williamson, Joseph N Jarvis, Anil A Panackal, Matthew C Fisher, Síle F Molloy, Angela Loyse, Thomas S Harrison
HIV-associated cryptococcal meningitis is by far the most common cause of adult meningitis in many areas of the world that have high HIV seroprevalence. In most areas in Sub-Saharan Africa, the incidence of cryptococcal meningitis is not decreasing despite availability of antiretroviral therapy, because of issues of adherence and retention in HIV care. In addition, cryptococcal meningitis in HIV-seronegative individuals is a substantial problem: the risk of cryptococcal infection is increased in transplant recipients and other individuals with defects in cell-mediated immunity, and cryptococcosis is also reported in the apparently immunocompetent...
November 25, 2016: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/27882964/bacteria-establish-an-aqueous-living-space-in-plants-crucial-for-virulence
#14
Xiu-Fang Xin, Kinya Nomura, Kyaw Aung, André C Velásquez, Jian Yao, Freddy Boutrot, Jeff H Chang, Cyril Zipfel, Sheng Yang He
High humidity has a strong influence on the development of numerous diseases affecting the above-ground parts of plants (the phyllosphere) in crop fields and natural ecosystems, but the molecular basis of this humidity effect is not understood. Previous studies have emphasized immune suppression as a key step in bacterial pathogenesis. Here we show that humidity-dependent, pathogen-driven establishment of an aqueous intercellular space (apoplast) is another important step in bacterial infection of the phyllosphere...
November 23, 2016: Nature
https://www.readbyqxmd.com/read/27880933/immunological-effects-of-nilotinib-prophylaxis-after-allogeneic-stem-cell-transplantation-in-patients-with-advanced-chronic-myeloid-leukemia-or-philadelphia-chromosome-positive-acute-lymphoblastic-leukemia
#15
Nira Varda-Bloom, Ivetta Danylesko, Roni Shouval, Shiran Eldror, Atar Lev, Jacqueline Davidson, Esther Rosenthal, Yulia Volchek, Noga Shem-Tov, Ronit Yerushalmi, Avichai Shimoni, Raz Somech, Arnon Nagler
Allogeneic stem cell transplantation remains the standard treatment for resistant advanced chronic myeloid leukemia and Philadelphia chromosome-positive acute lymphoblastic leukemia. Relapse is the major cause of treatment failure in both diseases. Post-allo-SCT administration of TKIs could potentially reduce relapse rates, but concerns regarding their effect on immune reconstitution have been raised. We aimed to assess immune functions of 12 advanced CML and Ph+ ALL patients who received post-allo-SCT nilotinib...
November 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27880797/regulation-and-maintenance-of-an-adoptive-t-cell-dependent-memory-b-cell-pool
#16
Marie Anson, Inês Amado, Marie-Pierre Mailhé, Emmanuel Donnadieu, Sylvie Garcia, François Huetz, Antonio A Freitas
We investigated the ability of monoclonal B cells to restore primary and secondary T-cell dependent antibody responses in adoptive immune-deficient hosts. Priming induced B cell activation and expansion, AID expression, antibody production and the generation of IgM+IgG- and IgM-IgG+ antigen-experienced B-cell subsets that persisted in the lymphopenic environment by cell division. Upon secondary transfer and recall the IgM-IgG+ cells responded by the production of antigen-specific IgG while the IgM+ memory cells secreted mainly IgM and little IgG, but generated new B cells expressing germinal center markers...
2016: PloS One
https://www.readbyqxmd.com/read/27878389/spleen-atrophy-related-immune-system-changes-attributed-to-infection-of-angiostrongylus-cantonensis-in-mouse-model
#17
Zhen Liu, Yu Wu, Ying Feng, Feng Wu, Rui-Feng Liu, Li-Fu Wang, Jin-Yi Liang, Jia-Hua Liu, Xi Sun, Zhong-Dao Wu
The spleen is one of the most important peripheral immune organs, which is frequently affected in infectious diseases. Infectious diseases can induce splenic alterations including splenic atrophy and functional alteration, while splenic atrophy may in turn interferes with recovery of infectious diseases. Angiostrongyliasis is an infectious disease by Angiostrongylus cantonensis (A. cantonensis), which invade non-permissive hosts, such as humans and mice, to cause severe damage to the central nervous system (CNS) and acute inflammatory response...
November 22, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27873281/generation-and-analysis-of-humanized-mouse-model-of-ebv-infection
#18
Ken-Ichi Imadome, Shigeyoshi Fujiwara
The recent development of severely immunodeficient mouse strains enabled the production of new-generation humanized mice, in which major components of the human immune system are reconstituted. These new-generation humanized mice can be infected with human pathogenic viruses that do not infect regular mice and target cells of the hematoimmune system. Here we describe the method for preparing humanized mice, infecting them with EBV, and for their virological and immunological analyses. The results obtained from our own mouse models are briefly described...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873280/mice-with-reconstituted-human-immune-system-components-as-a-tool-to-study-immune-cell-interactions-in-ebv-infection
#19
Frank Heuts, Noemi Nagy
Recent developments in mouse models that harbor part of a human immune system have proved extremely valuable to study the in vivo immune response to human specific pathogens such as Epstein-Barr virus. Over the last decades, advances in immunodeficient mouse strains that can be used as recipients for human immune cells have greatly enhanced the use of these models. Here, we describe the generation of mice with reconstituted human immune system (HIS mice) using immunocompromised mice transplanted with human CD34(+) hematopoietic stem cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27872737/immunity-to-infections-after-haploidentical-hematopoietic-stem-cell-transplantation
#20
REVIEW
Franco Aversa, Lucia Prezioso, Ilenia Manfra, Federica Galaverna, Angelica Spolzino, Alessandro Monti
The advantage of using a Human Leukocyte Antigen (HLA)-mismatched related donor is that almost every patient who does not have an HLA-identical donor or who urgently needs hematopoietic stem cell transplantation (HSCT) has at least one family member with whom shares one haplotype (haploidentical) and who is promptly available as a donor. The major challenge of haplo-HSCT is intense bi-directional alloreactivity leading to high incidences of graft rejection and graft-versus-host disease (GVHD). Advances in graft processing and pharmacologic prophylaxis of GVHD have reduced these risks and have made haplo-HSCT a viable alternative for patients lacking a matched donor...
2016: Mediterranean Journal of Hematology and Infectious Diseases
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