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https://www.readbyqxmd.com/read/29352292/rna-seq-of-kaposi-s-sarcoma-reveals-alterations-in-glucose-and-lipid-metabolism
#1
For Yue Tso, Andrew V Kossenkov, Salum J Lidenge, Owen Ngalamika, John R Ngowi, Julius Mwaiselage, Jayamanna Wickramasinghe, Eun Hee Kwon, John T West, Paul M Lieberman, Charles Wood
Kaposi's sarcoma-associated herpesvirus (KSHV) is the etiologic agent of Kaposi's sarcoma (KS). It is endemic in a number of sub-Saharan African countries with infection rate of >50%. The high prevalence of HIV-1 coupled with late presentation of advanced cancer staging make KS the leading cancer in the region with poor prognosis and high mortality. Disease markers and cellular functions associated with KS tumorigenesis remain ill-defined. Several studies have attempted to investigate changes of the gene profile with in vitro infection of monoculture models, which are not likely to reflect the cellular complexity of the in vivo lesion environment...
January 19, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29348988/anal-squamous-cell-carcinoma-in-a-patient-with-myasthenia-gravis-is-immunosuppression-the-main-underlying-etiology
#2
Muhammad Masab, Muhammad W Saif
Patients who are immunocompromised by diseases such as human immunodeficiency virus (HIV) infection are more prone to develop some malignancies such as Kaposi's sarcoma and central nervous system (CNS) lymphomas. Historically, anal squamous cell carcinoma (SCC) was also included on the list as an acquired immunodeficiency syndrome (AIDs)-defining cancer.  Similarly, compromised immune disorders including severe immunosuppression, haematologic malignancies, and solid organ transplantation have been identified as important risk factors for the development of anal SCC...
November 15, 2017: Curēus
https://www.readbyqxmd.com/read/29345958/plasma-cell-variant-multicentric-castleman-disease-and-kaposi-s-sarcoma-in-a-treatment-naive-hiv-infected-patient
#3
Anar S Patel, Rachel L Geller, Neela D Goswami
No abstract text is available yet for this article.
January 18, 2018: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29345349/enhanced-phosphorylation-of-sphingosine-and-ceramide-sustains-the-exuberant-proliferation-of-endothelial-progenitors-in-kaposi-sarcoma
#4
Loubna Abdel Hadi, Francesca Calcaterra, Lucia Brambilla, Claudia Carenza, Giovanni Marfia, Silvia Della Bella, Laura Riboni
Endothelial colony-forming cells (ECFCs), a unique endothelial stem cell population, are highly increased in the blood of Kaposi sarcoma (KS) patients. KS-derived ECFCs (KS-ECFCs) are also endowed with increased proliferative and vasculogenic potential, thus suggesting that they may be precursors of KS spindle cells. However, the mechanisms underlying the increased proliferative activity of KS-ECFCs remain poorly understood. Sphingosine-1-phosphate (S1P) and ceramide-1-phosphate (C1P) are metabolically interconnected sphingoid mediators crucial to cell proliferation...
December 15, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29343584/human-herpesvirus-8-interferon-regulatory-factors-1-and-3-mediate-replication-and-latency-activities-via-interactions-with-usp7-deubiquitinase
#5
Qiwang Xiang, Hyunwoo Ju, Qian Li, Szu-Chieh Mei, Daming Chen, Young Bong Choi, John Nicholas
Human herpesvirus 8 (HHV-8) encodes four viral interferon regulatory factors (vIRFs 1-4) that likely function to suppress innate immune and cellular stress responses through inhibitory interactions with various cellular proteins involved in these activities. It is notable that vIRFs 1 and 4 have been reported to interact with the deubiquitinase USP7, substrates of which include p53 and p53-targeting and destabilizing ubiquitin E3 ligase MDM2. Structural studies of vIRF-1 and vIRF-4 USP7-binding sequences in association with USP7 have been reported; both involve interactions with N-terminal domain residues of USP7, via EGPS and ASTS motifs in vIRF-1 and vIRF-4, respectively, but vIRF-4 residues also contact the catalytic site...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29343572/gamma-herpesvirus-colonization-of-the-spleen-requires-lytic-replication-in-b-cells
#6
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/29342139/structure-and-mutagenesis-reveal-essential-capsid-protein-interactions-for-kshv-replication
#7
Xinghong Dai, Danyang Gong, Hanyoung Lim, Jonathan Jih, Ting-Ting Wu, Ren Sun, Z Hong Zhou
Kaposi's sarcoma-associated herpesvirus (KSHV) causes Kaposi's sarcoma, a cancer that commonly affects patients with AIDS and which is endemic in sub-Saharan Africa. The KSHV capsid is highly pressurized by its double-stranded DNA genome, as are the capsids of the eight other human herpesviruses. Capsid assembly and genome packaging of herpesviruses are prone to interruption and can therefore be targeted for the structure-guided development of antiviral agents. However, herpesvirus capsids-comprising nearly 3,000 proteins and over 1,300 Å in diameter-present a formidable challenge to atomic structure determination and functional mapping of molecular interactions...
January 17, 2018: Nature
https://www.readbyqxmd.com/read/29339432/deregulation-of-hdac5-by-viral-interferon-regulatory-factor-3-plays-an-essential-role-in-kaposi-s-sarcoma-associated-herpesvirus-induced-lymphangiogenesis
#8
Hye-Ra Lee, Fan Li, Un Yung Choi, Hye Ryun Yu, Grace M Aldrovandi, Pinghui Feng, Shou-Jiang Gao, Young-Kwon Hong, Jae U Jung
Kaposi's sarcoma-associated herpesvirus (KSHV) is the etiologic agent for Kaposi's sarcoma (KS), which is one of the most common HIV-associated neoplasms. The endothelium is the thin layer of squamous cells where vascular blood endothelial cells (BECs) line the interior surface of blood vessels and lymphatic endothelial cells (LECs) are in direct contact with lymphatic vessels. The KS lesions contain a prominent compartment of neoplastic spindle morphology cells that are closely related to LECs. Furthermore, while KSHV can infect both LECs and BECs in vitro, its infection activates genetic programming related to lymphatic endothelial cell fate, suggesting that lymphangiogenic pathways are involved in KSHV infection and malignancy...
January 16, 2018: MBio
https://www.readbyqxmd.com/read/29334884/acroangiodermatitis-mimicking-kaposi-s-sarcoma-in-an-hiv-positive-man
#9
B P Goorney, J Newsham, D Fitzgerald, L Motta
Kaposi's sarcoma (KS) is the commonest human immunodeficiency virus (HIV)-related malignancy with its characteristic cutaneous morphological appearance and histopathological features. However, it can be simulated by other co-morbid opportunistic infections and unrelated dermatological conditions. We describe such a case of acroangiodermatitis in an HIV co-infected man, based on exclusion of KS histologically and the absence of human herpesvirus 8, the causative agent of KS.
January 1, 2018: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29333368/oral-lesions-associated-with-human-immunodeficiency-virus-in-75-adult-patients-a-clinical-study
#10
Antoine Berberi, Georges Aoun
Objectives: The objective of this study was to investigate the presence of oral lesions in human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) patients in a descriptive cross-sectional study, and to establish their presence according to levels of CD4+ cells (including the CD4+/CD8+ cell ratio). Materials and Methods: A total of 75 patients infected with HIV were included. Oral lesions were observed and classified using World Health Organization classification guidelines...
December 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29330173/seasonal-variations-in-tuberculosis-diagnosis-among-hiv-positive-individuals-in-southern-africa-analysis-of-cohort-studies-at-antiretroviral-treatment-programmes
#11
Marie Ballif, Kathrin Zürcher, Stewart E Reid, Andrew Boulle, Matthew P Fox, Hans W Prozesky, Cleophas Chimbetete, Marcel Zwahlen, Matthias Egger, Lukas Fenner
OBJECTIVES: Seasonal variations in tuberculosis diagnoses have been attributed to seasonal climatic changes and indoor crowding during colder winter months. We investigated trends in pulmonary tuberculosis (PTB) diagnosis at antiretroviral therapy (ART) programmes in Southern Africa. SETTING: Five ART programmes participating in the International Epidemiology Database to Evaluate AIDS in South Africa, Zambia and Zimbabwe. PARTICIPANTS: We analysed data of 331 634 HIV-positive adults (>15 years), who initiated ART between January 2004 and December 2014...
January 11, 2018: BMJ Open
https://www.readbyqxmd.com/read/29325033/cancer-risk-in-older-people-living-with-human-immunodeficiency-virus-infection-in-the-united-states
#12
Parag Mahale, Eric A Engels, Anna E Coghill, Amy R Kahn, Meredith S Shiels
Background: Cancer risk is increased in people living with HIV (PLWH). Improved survival has led to an aging of PLWH. We evaluated the cancer risk in older PLWH (age ≥50 years). Methods: We included data from the HIV/AIDS Cancer Match Study (1996-2012) and evaluated risk of Kaposi sarcoma (KS), non-Hodgkin lymphoma (NHL), Hodgkin lymphoma, and cervical, anal, lung, liver, oral cavity/pharyngeal, breast, prostate, and colon cancers in older PLWH compared to the general population by calculating the standardized incidence ratios (SIRs) and excess absolute risks (EARs)...
January 8, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29324995/pd-1-blockade-with-nivolumab-in-endemic-kaposi-sarcoma
#13
J Delyon, A Bizot, M Battistella, I Madelaine, L Vercellino, C Lebbé
No abstract text is available yet for this article.
January 8, 2018: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29321307/kaposi-s-sarcoma-associated-herpesvirus-k8-is-an-rna-binding-protein-that-regulates-viral-dna-replication-in-coordination-with-a-noncoding-rna
#14
Dongcheng Liu, Yan Wang, Yan Yuan
KSHV lytic replication and constant primary infection of fresh cells are crucial for viral tumorigenicity. Virus-encoded b-Zip family protein K8 plays an important role in viral DNA replication in both viral reactivation and de novo infection. The mechanism underlying the functional role of K8 in the viral life cycle is elusive. Here we report that K8 is a RNA binding protein, which also associates with many proteins including other RNA binding proteins. Many K8-involved protein-protein interactions are mediated by RNA...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29320814/genotypic-identification-of-cystoisospora-in-immunocompromised-patients-using-tm-variation-analysis
#15
Maha M A Basyoni, Hany Ahmed Fouad Elghobary
Cystoisospora is responsible for morbidity in immunocompromised patients. PCR is sensitive for diagnosing Cystoisospora; however, it needs reevaluation for differential molecular diagnosis of cystoisosporiasis. We aimed at evaluating melting curve analysis (MCA) after real-time PCR (qPCR) in diagnosis and genotyping of Cystoisospora as an alternative to conventional PCR. We included 293 diarrheic stool samples of patients attending the Department of Clinical Oncology and Nuclear Medicine of Cairo University Hospitals, Egypt...
December 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/29306041/rubbery-purple-and-red-lesions-in-the-gi-tract-a-case-of-gi-tract-kaposi-sarcoma
#16
Tarek Nammour, Michael Dagher, Jana G Hashash
No abstract text is available yet for this article.
January 3, 2018: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29305081/extending-knowledge-of-the-clinical-picture-of-balkan-adder-vipera-berus-bosniensis-envenoming-the-first-photographically-documented-neurotoxic-case-from-south-western-hungary
#17
Csaba Varga, Tamás Malina, Viktória Alföldi, Gergely Bilics, Ferenc Nagy, Tibor Oláh
We report a severe envenoming associated with minimal local symptoms following a Balkan adder (Vipera berus bosniensis) bite in South-Western Hungary. A 63-year-old male with a history of hypertension and sinus bradycardia (45/min) was bitten by a sub-adult specimen of V. b. bosniensis in Somogy County on 04 May 2017. The patient was transported to and treated at the Emergency Department of Somogy County "Moritz Kaposi" General Hospital, Kaposvár. Locally only pain and minimal swelling with a small haematoma developed on the bitten finger...
January 2, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29302027/kshv-episomes-reveal-dynamic-chromatin-loop-formation-with-domain-specific-gene-regulation
#18
Mel Campbell, Tadashi Watanabe, Kazushi Nakano, Ryan R Davis, Yuanzhi Lyu, Clifford G Tepper, Blythe Durbin-Johnson, Masahiro Fujimuro, Yoshihiro Izumiya
The three-dimensional structure of chromatin organized by genomic loops facilitates RNA polymerase II access to distal promoters. The Kaposi's sarcoma-associated herpesvirus (KSHV) lytic transcriptional program is initiated by a single viral transactivator, K-Rta. Here we report the KSHV genomic structure and its relationship with K-Rta recruitment sites using Capture Hi-C analyses. High-resolution 3D viral genomic maps identify a number of direct physical, long-range, and dynamic genomic interactions. Mutant KSHV chromosomes harboring point mutations in the K-Rta responsive elements (RE) significantly attenuate not only the directly proximate downstream gene, but also distal gene expression in a domain-specific manner...
January 4, 2018: Nature Communications
https://www.readbyqxmd.com/read/29291200/human-herpesvirus-8-positive-iatrogenic-kaposi-s-sarcoma-in-the-setting-of-refractory-ulcerative-colitis
#19
Erica Duh, Sean Fine
Although Kaposi sarcoma (KS) has been more traditionally considered an AIDS-defining illness, it may also be seen in individuals on immunosuppresive therapy. We report a case of a patient who presented to the hospital in the setting of increasingly refractory ulcerative colitis. Computed tomography scan of the abdomen was consistent with sigmoid diverticulititis and blood cultures were positive for Klebsiella. After a course of antibiotics with resolution of infection, a colonoscopy was performed to evaluate his diverticulitis and incidentally revealed a new rectal tumor...
December 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29290414/anaplastic-kaposi-s-sarcoma-5-cases-of-a-rare-and-aggressive-type-of-kaposi-s-sarcoma
#20
M Chapalain, G Goldman-Lévy, N Kramkimel, A Carlotti, N Franck, C Lheure, V Audard, M-F Avril, A-G Marcelin, D Damotte, B Terris, S Aractingi, N Dupin
BACKGROUND: Anaplastic Kaposi's sarcoma (KS) is a rare form of KS characterized clinically by the development of a tumour mass with unusual local aggressiveness and histologically by a specific architecture and cytological morphology. A very small number of limited series in endemic countries have established characteristics common to these anaplastic forms of KS. We present five patients with an anaplastic form in a context of KS ongoing for several years in a non-endemic country. MATERIALS AND METHODS: We collected 5 cases of anaplastic KS followed in our department over a period of 20years...
December 28, 2017: Annales de Dermatologie et de Vénéréologie
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