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Tropical Pathology

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https://www.readbyqxmd.com/read/28441703/in-vitro-and-in-vivo-inhibitory-effects-of-%C3%AE-mangostin-on-cholangiocarcinoma-cells-and-allografts
#1
Ratchadawan Aukkanimart, Thidarut Boonmars, Pranee Sriraj, Panupan Sripan, Jiraporn Songsri, Panaratana Ratanasuwan, Porntip Laummaunwai, Parichart Boueroy, Sukhonthip Khueangchaingkhwang, Benjamabhorn Pumhirunroj, Atchara Artchayasawat, Sirintip Boonjaraspinyo, Zhiliang Wu, Chariya Hahnvajanawong, Kulthida Vaeteewoottacharn, Sopit Wongkham
We investigated the anti-cholangiocarcinoma effect of α-mangostin from Garcinia mangostana pericarp extract (GM) in a human cholangiocarcinoma (CCA) cell line and a hamster CCA allograft model. In vitro, human CCA cells were treated with GM at various concentrations and for different time periods; then cell-cycle arrest and apoptosis were evaluated using flow cytometry, and metastatic potential with wound healing assays. In vivo, hamster allografts were treated with GM, gemcitabine (positive control) and a placebo (negative control) for 1 month; tumor weight and volume were then determined...
March 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28428344/vascular-adhesion-protein-1-is-elevated-in-primary-sclerosing-cholangitis-is-predictive-of-clinical-outcome-and-facilitates-recruitment-of-gut-tropic-lymphocytes-to-liver-in-a-substrate-dependent-manner
#2
Palak J Trivedi, Joseph Tickle, Mette Nåmdal Vesterhus, Peter J Eddowes, Tony Bruns, Jani Vainio, Richard Parker, David Smith, Evaggelia Liaskou, Liv Wenche Thorbjørnsen, Gideon M Hirschfield, Kaisa Auvinen, Stefan G Hubscher, Marko Salmi, David H Adams, Chris J Weston
OBJECTIVE: Primary sclerosing cholangitis (PSC) is the classical hepatobiliary manifestation of IBD. This clinical association is linked pathologically to the recruitment of mucosal T cells to the liver, via vascular adhesion protein (VAP)-1-dependent enzyme activity. Our aim was to examine the expression, function and enzymatic activation of the ectoenzyme VAP-1 in patients with PSC. DESIGN: We examined VAP-1 expression in patients with PSC, correlated levels with clinical characteristics and determined the functional consequences of enzyme activation by specific enzyme substrates on hepatic endothelium...
April 20, 2017: Gut
https://www.readbyqxmd.com/read/28405984/a-prospective-study-of-acute-kidney-injury-according-to-kdigo-definition-and-its-mortality-predictors
#3
Rakesh Bhadade, Rosemarie De'Souza, Minal J Harde, Kalpana S Mehta, Prabhat Bhargava
BACKGROUND: Acute kidney injury is no longer considered to be an innocent bystander merely reflecting co-existent pathologies but an independent risk factor for mortality in the ICU. AIMS AND OBJECTIVES: To study clinical profile and correlation of patients with acute kidney injury (AKI) according to KDIGO definition with respect to incidence, outcome and different causes of AKI in critical care unit. STUDY DESIGN AND SETTING: It is a prospective observational study; and was carried out in the ICU of a tertiary care, teaching, public hospital...
December 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28388673/proteolysis-of-mature-hiv-1-p6-gag-protein-by-the-insulin-degrading-enzyme-ide-regulates-virus-replication-in-an-env-dependent-manner
#4
Friedrich Hahn, Adrian Schmalen, Christian Setz, Melanie Friedrich, Stefan Schlößer, Julia Kölle, Robert Spranger, Pia Rauch, Kirsten Fraedrich, Tatjana Reif, Julia Karius-Fischer, Ashok Balasubramanyam, Petra Henklein, Torgils Fossen, Ulrich Schubert
There is a significantly higher risk for type II diabetes in HIV-1 carriers, albeit the molecular mechanism for this HIV-related pathology remains enigmatic. The 52 amino acid HIV-1 p6 Gag protein is synthesized as the C-terminal part of the Gag polyprotein Pr55. In this context, p6 promotes virus release by its two late (L-) domains, and facilitates the incorporation of the viral accessory protein Vpr. However, the function of p6 in its mature form, after proteolytic release from Gag, has not been investigated yet...
2017: PloS One
https://www.readbyqxmd.com/read/28344946/incidental-maxillary-sinus-findings-on-cranial-computerized-tomographic-scan-in-a-tropical-setting
#5
C C Ani, A A Adoga, G S Tawe
BACKGROUND: Abnormalities in the maxillary sinuses are occasional findings on routine CT scans of the head. AIM: To study the incidental findings in the CT scans of the maxillary sinuses in patients with indications other than sinuses-related diseases. SETTING: Jos University Teaching Hospital, Jos, Nigeria. MATERIALS AND METHODS: Images of patients who underwent CT scan of the head over a 5-month period (January 2015- May 2015) were retrospectively reviewed with the exclusion of those whose indication for the scan was trauma or sinus related disease...
April 2016: Journal of the West African College of Surgeons
https://www.readbyqxmd.com/read/28344469/acute-toxicity-profiling-of-the-ethyl-acetate-fraction-of-swietenia-macrophylla-seeds-and-in-vitro-neuroprotection-studies
#6
Mustak Sayyad, Ning Tiang, Yatinesh Kumari, Bey Hing Goh, Yogini Jaiswal, Rozita Rosli, Leonard Williams, Mohd Farooq Shaikh
Swietenia macrophylla (SM) is a medicinally important plant found in tropical and subtropical regions of the world. The ethyl acetate fraction of the seeds of S. macrophylla (SMEAF) is reported to exhibit potent anticancer, antitumor, anti-inflammatory and antifeedant activities. Till date, there have been no studies reported on the acute oral toxicity profile of the ethyl acetate fraction of the seeds of SM. The objective of the present study was to determine the acute toxicity of SMEAF and evaluate the in-vitro neuroprotective activity of SMEAF using primary neuronal cell cultures...
February 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28262632/pufferfish-mortality-associated-with-novel-polar-marine-toxins-in-hawaii
#7
Thierry M Work, Peter D R Moeller, Kevin R Beauchesne, Julie Dagenais, Renee Breeden, Robert Rameyer, William J Walsh, Melanie Abecassis, Donald R Kobayashi, Carla Conway, James Winton
Fish die-offs are important signals in tropical marine ecosystems. In 2010, a mass mortality of pufferfish in Hawaii (USA) was dominated by Arothron hispidus showing aberrant neurological behaviors. Using pathology, toxinology, and field surveys, we implicated a series of novel, polar, marine toxins as a likely cause of this mass mortality. Our findings are striking in that (1) a marine toxin was associated with a kill of a fish species that is itself toxic; (2) we provide a plausible mechanism to explain clinical signs of affected fish; and (3) this epizootic likely depleted puffer populations...
March 6, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28205355/trametes-polyzona-an-emerging-filamentous-basidiomycete-in-r%C3%A3-union-island
#8
Alexandre Gauthier, Julien Jaubert, Nicolas Traversier, Jérôme Lemant, Laurent Balu, Dea Garcia-Hermoso, Stephane Welti, Anne Favel, Sandrine Picot, Gautier Hoarau
We describe two serious Trametes polyzona pulmonary infections, which occurred in Réunion Island, in critically ill patients. The identification was performed using sequencing of the internal transcribed spacer region of ribosomal DNA and D1/D2 region of 28S rDNA. In one case, the significance of T. polyzona in the pathological process was certain, proven by histopathological evidence of fungal lung infection. T. polyzona, an emerging filamentous basidiomycete, prevalent in tropical areas, has not been described so far in human infections...
February 16, 2017: Mycoses
https://www.readbyqxmd.com/read/28188440/pathology-of-infectious-diseases-what-does-the-future-hold
#9
REVIEW
Paul Hofman, Sebastian Lucas, Grégory Jouvion, Arnault Tauziède-Espariat, Fabrice Chrétien, Gieri Cathomas
The demand for expertise in pathology for the diagnosis of infectious diseases (ID) is continually growing, due to an increase in ID in immunocompromised patients and in the (re)-emergence of common and uncommon diseases, including tropical infections and infections with newly identified microbes. The microbiology laboratory plays a crucial role in diagnosing infections, identifying the responsible infectious agents and establishing sensitivity of pathogens to drug therapy. Pathology, however, is the only way to correlate the presence of an infectious agent with the reaction it evokes at cell and tissue level...
May 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28159534/chikungunya-virus-an-update-on-the-biology-and-pathogenesis-of-this-emerging-pathogen
#10
REVIEW
Felicity J Burt, Weiqiang Chen, Jonathan J Miner, Deborah J Lenschow, Andres Merits, Esther Schnettler, Alain Kohl, Penny A Rudd, Adam Taylor, Lara J Herrero, Ali Zaid, Lisa F P Ng, Suresh Mahalingam
Re-emergence of chikungunya virus, a mosquito-transmitted pathogen, is of serious public health concern. In the past 15 years, after decades of infrequent, sporadic outbreaks, the virus has caused major epidemic outbreaks in Africa, Asia, the Indian Ocean, and more recently the Caribbean and the Americas. Chikungunya virus is mainly transmitted by Aedes aegypti mosquitoes in tropical and subtropical regions, but the potential exists for further spread because of genetic adaptation of the virus to Aedes albopictus, a species that thrives in temperate regions...
April 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28155040/-what-makes-a-parasite-transforming-insights-into-cancer-from-the-agents-of-an-exotic-pathology-theileria-spp
#11
K M Cheeseman, J B Weitzman
Theileria are obligate eukaryotic intracellular parasites of cattle. The diseases they cause, Tropical theileriosis and East Coast Fever, cause huge economic loss in East African, Mediterranean and central and South-East Asian countries. These apicomplexan parasites are the only intracellular eukaryotic parasites known to transform their host cell and represent a unique model to study host-parasite interactions and mechanisms of cancer onset. Here, we review how Theileria parasites induce transformation of their leukocyte host cell and discuss similarities with tumorigenesis...
February 2, 2017: Bulletin de la Société de Pathologie Exotique
https://www.readbyqxmd.com/read/28061874/slc11a1-polymorphisms-and-host-susceptibility-to-cutaneous-leishmaniasis-in-pakistan
#12
Mariam Sophie, Abdul Hameed, Akhtar Muneer, Azam J Samdani, Saima Saleem, Abid Azhar
BACKGROUND: The vector-borne cutaneous leishmaniasis (CL) is endemic in several regions of Pakistan mainly affecting poor populations. Host genetic factors, particularly SLC11A1 (solute carrier transmembrane protein) within macrophages, play a crucial role in disease pathology and susceptibility. Association of SLC11A1 with cutaneous leishmaniasis, a neglected tropical disease, is not well established. Inconsistencies have been observed within different populations worldwide with respect to genetic susceptibility...
January 7, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28003031/pyomyositis-is-not-only-a-tropical-pathology-a-case-series
#13
Laura Comegna, Paola Irma Guidone, Giovanni Prezioso, Simone Franchini, Marianna Immacolata Petrosino, Paola Di Filippo, Francesco Chiarelli, Angelika Mohn, Nadia Rossi
BACKGROUND: Pyomyositis is an acute bacterial infection of skeletal muscle that results in localized abscess formation. This infection was thought to be endemic to tropical countries, and is also known as "tropical pyomyositis". However, pyomyositis is increasingly recognized in temperate climates and is frequently associated with an immunosuppressive condition, such as human immunodeficiency virus, malignancy, and diabetes mellitus. It is also found in healthy and athletic people after strenuous or vigorous exercise or following localized and possibly unnoticed trauma...
December 21, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27988094/human-schistosomiasis-in-the-post-mass-drug-administration-era
#14
REVIEW
Francisca Mutapi, Rick Maizels, Alan Fenwick, Mark Woolhouse
Profound changes are occurring in the epidemiology of schistosomiasis, a neglected tropical disease caused by a chronic infection with parasitic helminths of the genus Schistosoma. Schistosomiasis currently affects 240 million people worldwide, mostly in sub-Saharan Africa. The advent and proliferation of mass drug administration (MDA) programmes using the drug praziquantel is resulting in substantial increases in the number of people, mainly children aged 6-14 years, being effectively treated, approaching the point where most people in endemic areas will receive one or more treatments during their lifetimes...
February 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27935474/a-pathology-of-progress-locating-the-historiography-of-cancer
#15
Agnes Arnold-Forster
Despite its prominent position in today's medical research, popular culture and everyday life, cancer's history is relatively unwritten. Compared to the other great 'plagues' - cholera, tuberculosis or tropical fevers, to name but a scant handful - cancer has few dedicated pages in the general surveys, and its specialists have largely failed to convince the broader community of medical historians - or indeed historians of anything at all - that histories of the disease can tell us fundamental things about the science and practice of medicine, both past and present...
December 2016: British Journal for the History of Science
https://www.readbyqxmd.com/read/27896634/th9-cells-in-skin-disorders
#16
REVIEW
Rachael A Clark, Christoph Schlapbach
Interleukin 9 secreting TH9 cells have been proposed as the latest addition to the family of T helper cell subsets. While a growing body of evidence from animal models points to important roles for these cells in allergic inflammation of the lung, autoinflammation of the gastrointestinal tract, and tumor immunity, their role in skin immunity and skin immunopathology remains poorly defined. Interestingly, studies of T helper cells from healthy humans suggest that TH9 cells are predominantly skin-homing and skin-resident and that they are involved in protection against extracellular pathogens...
January 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/27893778/mycobacterium-ulcerans-mouse-model-refinement-for-pre-clinical-profiling-of-vaccine-candidates
#17
Angèle Bénard, Claudia Sala, Gerd Pluschke
Buruli Ulcer is a neglected tropical disease leading to extensive disabilities and morbidity in West Africa. In this paper we sought to characterize various strains of Mycobacterium ulcerans (M.ulcerans) with different origins and laboratory passage records while refining a mouse model for Buruli ulcer. We described, compared and followed the kinetics of the histo-pathological outcome of infection of a collection of strains at various anatomical sites of infection in order to find a suitable model for further immunization studies...
2016: PloS One
https://www.readbyqxmd.com/read/27885775/the-coffee-leaf-rust-pathogen-hemileia-vastatrix-one-and-a-half-centuries-around-the-tropics
#18
Pedro Talhinhas, Dora Batista, Inês Diniz, Ana Vieira, Diogo N Silva, Andreia Loureiro, Sílvia Tavares, Ana Paula Pereira, Helena G Azinheira, Leonor Guerra-Guimarães, Vítor Várzea, Maria do Céu Silva
Taxonomy and history: Hemileia vastatrix Berk. and Broome (Basidiomycota, Pucciniales) was described in 1869 in Eastern Africa and Ceylon as the agent of Coffee Leaf Rust and spread to all coffee cultivation areas worldwide. Major disease outbreaks in Asia, Africa and America caused and continue to cause severe yield losses, making this the most important disease of Arabica coffee, a cash crop for many tropical and sub-tropical countries. Life cycle and disease symptoms: Hemileia vastatrix is a hemicyclic fungus with the urediniosporic life cycle as its most important (if not only) source of inoculum...
November 25, 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/27871430/htlv-1-associated-myelopathy-tropical-spastic-paraparesis-ham-tsp-a-comparative-study-to-identify-factors-that-influence-disease-progression
#19
Eiji Matsuura, Satoshi Nozuma, Yuichi Tashiro, Ryuji Kubota, Shuji Izumo, Hiroshi Takashima
OBJECTIVE: HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) can progress slowly or rapidly even though a set of symptoms such as spastic paraparesis with pathological reflexes and sweating loss of the lower extremities are commonly observed in patients. Although most of the patients are thought to be infected to HTLV-1 from their mothers by breast feeding, symptoms of HAM/TSP typically manifest in patients later in life (50-60years old in age) and also with a higher prevalence of women to men at a ratio of approximately 3:1...
December 15, 2016: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27833976/histopathological-and-clinical-traps-in-lichen-sclerosus-a-case-report
#20
Daciana Elena Brănişteanu, Daniel Constantin Brănişteanu, Gabriela Stoleriu, Dan Ferariu, Cătălina Maria Voicu, Loredana Elena Stoica, Constantin Căruntu, Daniel Boda, Florina Mihaela Filip-Ciubotaru, Andreea Dimitriu, Cezar Doru Radu
Lichen sclerosus et atrophicus and limited systemic scleroderma (acrosclerosis) are inflammatory skin diseases that ultimately evolve into two distinct modes of atrophic scar formation, but which can easily be confused clinically. They are very rarely associated. The literature has reported cases in which lichen sclerosus was associated with various forms of scleroderma, but often with localized morphea. The characteristic histopathological picture of lichen sclerosus includes a thin epidermis, with orthohyperkeratosis and vascular degeneration in the basal layer, loss of elastic fibers, and band-like inflammatory infiltrate in the papillary dermis, while systemic sclerosis is characterized by excessive deposition of collagen in the dermis, accompanied by reduction in adnexal structures and their entrapment in collagen, and the presence of perivascular lymphocytic inflammatory infiltrate...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
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