keyword
MENU ▼
Read by QxMD icon Read
search

Virus-specific T cell

keyword
https://www.readbyqxmd.com/read/29345922/efficient-fusion-at-neutral-ph-by-human-immunodeficiency-virus-gp41-trimers-containing-the-fusion-peptide-and-transmembrane-domain
#1
Shuang Liang, Punsisi Ratnayake, Craig Keinath, Lihui Jia, Robert Wolfe, Ahinsa Ranaweera, David P Weliky
Human immunodeficiency virus (HIV) is membrane-enveloped and an initial infection step is joining/fusion of viral and cell membranes. This step is catalyzed by gp41 which is a single-pass integral viral membrane protein. The protein contains a ~170-residue ectodomain located outside the virus that is important for fusion, and includes the fusion peptide (FP), N-helix, loop, C-helix, and viral membrane-proximal external region (MPER). The virion initially has non-covalent complexes between three gp41 ectodomains and three gp120 proteins...
January 18, 2018: Biochemistry
https://www.readbyqxmd.com/read/29343578/a-new-quinoline-brd4-inhibitor-targets-a-distinct-latent-hiv-1-reservoir-for-re-activation-from-other-shock-drugs
#2
Erik Abner, Mateusz Stoszko, Lei Zeng, Heng-Chang Chen, Andrea Izquierdo-Bouldstridge, Tsuyoshi Konuma, Eduard Zorita, Elisa Fanunza, Qiang Zhang, Tokameh Mahmoudi, Ming-Ming Zhou, Guillaume J Filion, Albert Jordan
Upon HIV-1 infection, a reservoir of latently infected resting T cells prevents the eradication of the virus from patients. To achieve complete depletion, the existing virus-suppressing antiretroviral therapy must be combined with drugs that reactivate the dormant viruses. We previously described a novel chemical scaffold compound, MMQO (8-methoxy-6-methylquinolin-4-ol) that is able to reactivate viral transcription in several models of HIV latency including J-Lat cells through an unknown mechanism. MMQO potentiates the activity of known latency-reversing agents (LRAs) or 'shock' drugs such as PKC agonists or HDAC inhibitors...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29343577/cellular-and-humoral-immunity-protect-against-vaginal-zika-virus-infection-in-mice
#3
Jason M Scott, Tania J Lebratti, Justin M Richner, Xiaoping Jiang, Estefania Fernandez, Haiyan Zhao, Daved H Fremont, Michael S Diamond, Haina Shin
Zika virus (ZIKV), which can cause devastating disease in fetuses of infected pregnant women, can be transmitted by mosquito inoculation and sexual routes. Little is known about immune protection against sexually transmitted ZIKV. In this study, we show that previous infection through intravaginal or subcutaneous routes with a contemporary Brazilian strain of ZIKV can protect against subsequent intravaginal challenge with a homologous strain. Both routes of inoculation induced high titers of ZIKV-specific and neutralizing antibody in serum and the vaginal lumen...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29343572/gamma-herpesvirus-colonization-of-the-spleen-requires-lytic-replication-in-b-cells
#4
Clara Lawler, Marta Pires de Miranda, Janet May, Orry Wyer, J Pedro Simas, Philip G Stevenson
Gamma-herpesviruses infect lymphocytes and cause lymphocytic cancers. Murid Herpesvirus-4 (MuHV-4), Epstein-Barr virus and the Kaposi's Sarcoma-associated Herpesvirus all infect B cells. Latent infection can spread by B cell recirculation and proliferation, but whether this alone achieves systemic infection is unclear. To test the need of MuHV-4 for lytic infection in B cells we flanked its essential ORF50 lytic transactivator with loxP sites, then infected mice with B cell-specific cre expression (CD19-cre)...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29341877/characterizing-the-effects-of-insertion-of-a-5-2%C3%A2-kb-region-of-a-vacv-genome-which-contains-known-immune-evasion-genes-on-mva-immunogenicity
#5
Melissa R Ryerson, Joanna L Shisler
Modified Vaccinia virus Ankara (MVA) is an attenuated Vaccinia virus (VACV) that is a popular vaccine vector candidate against many different pathogens. Its replication-restricted nature makes it a safe vaccine. However, higher doses or multiple boosts of MVA are necessary to elicit an immune response similar to wild-type VACV. Multiple strategies have been used to create modified MVA viruses that remain safe, but have increased immunogenicity. For example, one common strategy is to delete MVA immunomodulatory proteins in hopes of increasing the host immune response...
January 13, 2018: Virus Research
https://www.readbyqxmd.com/read/29341118/inhibition-of-the-fgl2-fc%C3%AE-riib-riii-immunosuppressive-pathway-enhances-antiviral-t-cell-and-b-cell-responses-leading-to-clearance-of-lcmv-cl-13
#6
Olga Klingberg, Ramzi Khattar, Kaveh Farrokhi, Dario Ferri, Nataliya Yavorska, Jianhua Zhang, Hassan Sadozai, Oyedele Adeyi, Andrzej Chruscinski, Gary A Levy, Nazia Selzner
Persistent viruses evade immune detection by interfering with virus-specific innate and adaptive antiviral immune responses. Fibrinogen-Like Protein-2 (FGL2) is a potent effector molecule of CD4+ CD25+ FoxP3+ regulatory T cells (Treg) and exerts its immunosuppressive activity following ligation to its cognate receptor, FcγRIIB/RIII. The role of FGL2 in the pathogenesis of chronic viral infection caused by Lymphocytic Choriomeningitis Virus Clone-13 (LCMV cl-13) was assessed in this study. Chronically infected fgl2+/+ mice had increased plasma levels of FGL2, with reduced expression of the maturation markers, CD80, CD86 and MHC-II on macrophages and dendritic cells (DC) and impaired production of neutralizing antibody...
January 17, 2018: Immunology
https://www.readbyqxmd.com/read/29340714/taxonomical-resolution-and-distribution-of-bacterioplankton-along-the-vertical-gradient-reveals-pronounced-spatiotemporal-patterns-in-contrasted-temperate-freshwater-lakes
#7
J Keshri, A S Pradeep Ram, P A Nana, T Sime-Ngando
We examined the relationship between viruses and co-occurring bacterial communities across spatiotemporal scale in two contrasting freshwater lakes, namely meromictic Lake Pavin and dimictic Lake Aydat (Central France). Next-generation sequencing of 16S rRNA genes suggested distinct patterns in bacterioplankton community composition (BCC) between the lakes over depths and seasons. BCC were generally dominated by members of Actinobacteria, Proteobacteria, and Bacteroidetes covering about 95% of all sequences...
January 16, 2018: Microbial Ecology
https://www.readbyqxmd.com/read/29340620/delivery-of-tapasin-modified-ctl-epitope-peptide-via-cytoplasmic-transduction-peptide-induces-ctls-by-jak-stat-signaling-pathway-in-vivo
#8
Shanshan Wu, Xiaohua Chen, Yuyan Tang, Yi Zhang, Dan Li, Jie Chen, Jieling Wang, Zhenghao Tang, Guoqing Zang, Yongsheng Yu
Hepatitis B virus (HBV)-specific cytotoxic T lymphocytes (CTLs) play a vital role in viral control and clearance. Recent studies have elucidated that Tapasin, an endoplasmic reticulum chaperone, is a well-known molecule that appears to be essential in peptide-loading process. The Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway plays an important role in immune response regulation and cytokines secretion. We have previously verified that fusion protein CTP-HBcAg18-27-Tapasin could facilitate the maturation of bone marrow derived dendritic cells and enhance specific CTLs responses in vitro, which might be associated with the activation of JAK/STAT signaling pathway...
January 11, 2018: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/29338160/higher-activities-of-hepatic-versus-splenic-cd8-t-cells-in-responses-to-adoptive-t-cell-therapy-and-vaccination-of-b6-mice-with-mhc-class-1-binding-antigen
#9
Mohamed Labib Salem, Randa E El Naggar, Sabry A El Naggar, Maysa A Mobasher, Mohamed H Mahmoud, Gamal Badr
The liver has unique microenvironment which is known to induce tolerance of cytolytic CD8+ T cells to hepatic and extra hepatic antigens, resulting in persistence of infection of the liver by the hepatitis B and C viruses. However, under some conditions, functional immune responses can be elicited in the liver in particular to show preferential retention of activated CD8+ T cells. It is not clear whether this retention depends on the type of the exogenous immunostimulatory or the endogenous innate immune cells...
December 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/29337856/interaction-between-hepatitis-b-virus-and-toll-like-receptors-current-status-and-potential-therapeutic-use-for-chronic-hepatitis-b
#10
REVIEW
Zhiyong Ma, Qian Cao, Yong Xiong, Ejuan Zhang, Mengji Lu
Immune defense against infection with the hepatitis B virus (HBV) is complex and involves both host innate and adaptive immune systems. It is well accepted that the development of sufficient HBV-specific T cell and B cell responses are required for controlling an HBV infection. However, the contribution of innate immunity to removing HBV has been explored in recent years. Toll-like receptors (TLRs) are recognized as the first line of antiviral immunity because they initiate intracellular signaling pathways to induce antiviral mediators such as interferons (IFNs) and other cytokines...
January 16, 2018: Vaccines
https://www.readbyqxmd.com/read/29331266/human-papilloma-virus-specific-t-cells-can-be-generated-from-na%C3%A3-ve-t-cells-for-use-as-an-immunotherapeutic-strategy-for-immunocompromised-patients
#11
Sarah E McCormack, Conrad Russell Y Cruz, Kaylor E Wright, Allison B Powell, Haili Lang, Cornelia Trimble, Michael D Keller, Ephraim Fuchs, Catherine M Bollard
Human papilloma virus (HPV) is a known cause of cervical cancer, squamous cell carcinoma and laryngeal cancer. Although treatments exist for HPV-associated malignancies, patients unresponsive to these therapies have a poor prognosis. Recent findings from vaccine studies suggest that T-cell immunity is essential for disease control. Because Epstein-Barr Virus (EBV)-specific T cells have been highly successful in treating or preventing EBV-associated tumors, we hypothesized that the development of a manufacturing platform for HPV-specific T cells from healthy donors could be used in a third-party setting to treat patients with high-risk/relapsed HPV-associated cancers...
January 10, 2018: Cytotherapy
https://www.readbyqxmd.com/read/29329556/cancer-immunotherapy-beyond-immune-checkpoint-inhibitors
#12
REVIEW
Julian A Marin-Acevedo, Aixa E Soyano, Bhagirathbhai Dholaria, Keith L Knutson, Yanyan Lou
Malignant cells have the capacity to rapidly grow exponentially and spread in part by suppressing, evading, and exploiting the host immune system. Immunotherapy is a form of oncologic treatment directed towards enhancing the host immune system against cancer. In recent years, manipulation of immune checkpoints or pathways has emerged as an important and effective form of immunotherapy. Agents that target cytotoxic T lymphocyte-associated molecule-4 (CTLA-4), programmed cell death receptor-1 (PD-1), and programmed cell death ligand-1 (PD-L1) are the most widely studied and recognized...
January 12, 2018: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/29329113/therapeutic-hiv-1-vaccine-time-for-immunomodulation-and-combinatorial-strategies
#13
Nabila Seddiki, Yves Lévy
PURPOSE OF REVIEW: The purpose is to recall some of the key immunological elements that are at the crossroad and need to be combined for developing a potent therapeutic HIV-1 vaccine. RECENT FINDINGS: Therapeutic vaccines and cytokines have been commonly used to enhance and/or recall preexisting HIV-1 specific cell-mediated immune responses aiming to suppress virus replication. While the vaccine is important to stimulate HIV-1 specific T-cell responses, the cytokine may support the expansion of the stimulated virus-specific T cells...
January 10, 2018: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29326823/lichen-planus-following-tetanus-diphtheria-acellular-pertussis-vaccination-a-case-report-and-review-of-the-literature
#14
Heather C Rosengard, Chikoti M Wheat, Matthew P Tilson, Jonathan D Cuda
Lichen planus is an inflammatory dermatosis with a prevalence of approximately 1%. Recent meta-analyses show that patients with hepatitis C virus have a 2.5- to 4.5-fold increased risk of developing lichen planus. Lichen planus has also followed vaccinations and has specifically been attributed to the hepatitis B vaccine, the influenza vaccine, and the tetanus-diphtheria-acellular pertussis vaccine. We describe a case of lichen planus in a hepatitis C virus-infected African American male occurring in temporal association with the administration of the tetanus-diphtheria-acellular pertussis vaccine...
2018: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29325291/-hepatitis-b-core-antigen-promotes-invasion-of-hepatocellular-carcinoma-cell-line-hepg2-2-15-via-toll-like-receptor-4
#15
H R Hou, Y Kang, Y K Li, Y L Zeng, J F Wei, G G Ding, Z Peng, J Shang
Objective: To investigate the effect of hepatitis B core antigen (HBcAg) in promoting the invasion of hepatitis B virus (HBV)-related hepatocellular carcinoma cell line HepG2.2.15 and the role of Toll-like receptor 4 (TLR4) in the mechanism. Methods: TLR4 mRNA and protein expression in HepG2 cells and HepG2.2.15 cells was measured by reverse transcription real-time PCR and Western blot analysis, respectively. HepG2.2.15 cells were transfected with TLR4 specific small interfering RNA (siRNA) to silence TLR4 expression, and stimulated by recombinant HBcAg in culture...
December 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29324805/intranasal-vaccination-with-m2e5x-virus-like-particles-induces-humoral-and-cellular-immune-responses-conferring-cross-protection-against-heterosubtypic-influenza-viruses
#16
Young-Tae Lee, Eun-Ju Ko, Youri Lee, Ki-Hye Kim, Min-Chul Kim, Yu-Na Lee, Sang-Moo Kang
Current influenza vaccines do not provide broad cross-protection. Here, we report that intranasal vaccination with virus-like particles containing the highly conserved multiple ectodomains of matrix protein 2 (M2e5x VLP) of influenza virus induces broad cross-protection by M2-specific humoral and cellular immune responses. M2e5x VLP intranasal vaccination prevented severe weight loss, attenuated inflammatory cytokines and cellular infiltrates, and lowered viral loads, and induced germinal center phenotypic B and plasma cells...
2018: PloS One
https://www.readbyqxmd.com/read/29323725/serum-igg-antibodies-from-healthy-subjects-up-to-100-years-old-react-to-jc-polyomavirus
#17
Ilaria Bononi, Elisa Mazzoni, Silvia Pietrobon, Marco Manfredini, Elena Trregiani, Marika Rossini, Francesca Lotito, Giovanni Guerra, Paola Rizzo, Fernanda Martini, Mauro Tognon
JC polyomavirus (JCPyV) was identified in 1971 in the brain tissue of a patient (J.C.) affected by the progressive multifocal leukoencephalopathy (PML). JCPyV encodes for the oncoproteins large T antigen (Tag) and small t-antigen (tag). These oncoproteins are responsible of the cell transformation and tumorigenesis in experimental animals. JCPyV is ubiquitous in human populations. After the primary infection, which is usually asymptomatic, JCPyV remains lifelong in the host in a latent phase. Its reactivation may occur in heathy subjects and immunocompromised patients...
January 11, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29321332/erk-is-a-critical-regulator-of-jc-polyomavirus-infection
#18
Jeanne K DuShane, Michael P Wilczek, Colleen L Mayberry, Melissa S Maginnis
The human JC polyomavirus (JCPyV) infects the majority of the population worldwide and presents as an asymptomatic, persistent infection in the kidney. In individuals who are immunocompromised, JCPyV can become reactivated and cause a lytic infection in the central nervous system resulting in the fatal, demyelinating disease progressive multifocal leukoencephalopathy (PML). Infection is initiated by interactions between the capsid protein viral protein 1 (VP1) and the α2,6-linked sialic acid on LSTc, while JCPyV internalization is facilitated by 5-hydroxytryptamine 2 receptors (5-HT2Rs)...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29321323/hiv-1-vif-s-capacity-to-manipulate-the-cell-cycle-is-species-specific
#19
Edward L Evans, Jordan T Becker, Stephanie L Fricke, Kishan Patel, Nathan M Sherer
Cells derived from mice and other rodents exhibit profound blocks to HIV-1 virion production reflecting species-specific incompatibilities between viral Tat and Rev proteins and essential host factors Cyclin T1 (CCNT1) and Exportin-1 (XPO1, also known as CRM1), respectively. To determine if mouse cell blocks other than CCNT1 and XPO1 affect HIV's post-integration stages, we studied HIV-1NL4-3 gene expression in mouse NIH 3T3 cells modified to constitutively express HIV-1 compatible versions of CCNT1 and XPO1 (3T3...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29321308/sustained-specific-and-cross-reactive-t-cell-responses-to-zika-and-dengue-viruses-ns3-in-west-africa
#20
Bobby Brooke Herrera, Wen-Yang Tsai, Charlotte A Chang, Donald J Hamel, Wei-Kung Wang, Yichen Lu, Souleymane Mboup, Phyllis J Kanki
Recent studies on the role of T cells in Zika virus (ZIKV) infection have shown that T cell responses to Asian ZIKV infection are important for protection, and that previous Dengue virus (DENV) exposure amplifies the protective T cell response to Asian ZIKV. Human T cell responses to African ZIKV infection, however, remain unexplored. Here, we utilized the modified anthrax toxin delivery system to develop a flavivirus ELISPOT. Using human ZIKV and DENV samples from Senegal, West Africa, our results demonstrate specific and cross-reactive T cell responses to nonstructural protein 3 (NS3)...
January 10, 2018: Journal of Virology
keyword
keyword
19046
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"