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https://www.readbyqxmd.com/read/28822069/characterization-of-ofloxacin-interaction-with-mutated-a91v-quinolone-resistance-determining-region-of-dna-gyrase-in-mycobacterium-leprae-through-computational-simulation
#1
J Nisha, V Shanthi
Mycobacterium leprae, the causal agent of leprosy is non-cultivable in vitro. Thus, the assessment of antibiotic activity against Mycobacterium leprae depends primarily upon the time-consuming mouse footpad system. The GyrA protein of Mycobacterium leprae is the target of the antimycobacterial drug, Ofloxacin. In recent times, the GyrA mutation (A91V) has been found to be resistant to Ofloxacin. This phenomenon has necessitated the development of new, long-acting antimycobacterial compounds. The underlying mechanism of drug resistance is not completely known...
August 18, 2017: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28806750/characterization-of-novel-bangle-lectin-from-photorhabdus-asymbiotica-with-dual-sugar-binding-specificity-and-its-effect-on-host-immunity
#2
Gita Jančaříková, Josef Houser, Pavel Dobeš, Gabriel Demo, Pavel Hyršl, Michaela Wimmerová
Photorhabdus asymbiotica is one of the three recognized species of the Photorhabdus genus, which consists of gram-negative bioluminescent bacteria belonging to the family Morganellaceae. These bacteria live in a symbiotic relationship with nematodes from the genus Heterorhabditis, together forming a complex that is highly pathogenic for insects. Unlike other Photorhabdus species, which are strictly entomopathogenic, P. asymbiotica is unique in its ability to act as an emerging human pathogen. Analysis of the P...
August 14, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28801812/a%C3%A2-synopsis-of-the-history-of-hansen-s-disease
#3
Raissa Gonçalves Couto Dal Secco, Katlein França, David Castillo, Mana AlHarbi, Torello Lotti, Massimo Fioranelli, Maria Grazia Roccia
Leprosy is a contagious infectious disease caused by the bacillus Mycobacterium leprae. This microorganism was discovered by Dr. Gerhard Hansen, and the illness was then baptized as Hansen's disease. For a long time, Hansen's disease was thought to be hereditary-a curse or a punishment from God. The disease affects skin and nerves and can cause severe damage. Due to its destructive effects, leprosy has caused fear, segregation, and prejudice in all societies since Biblical times. Patients with Hansen's disease have not been treated humanely around the world throughout the ages...
August 11, 2017: Wiener Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28793313/deciphering-the-genetic-control-of-gene-expression-following-mycobacterium-leprae-antigen-stimulation
#4
Jérémy Manry, Yohann Nédélec, Vinicius M Fava, Aurélie Cobat, Marianna Orlova, Nguyen Van Thuc, Vu Hong Thai, Guillaume Laval, Luis B Barreiro, Erwin Schurr
Leprosy is a human infectious disease caused by Mycobacterium leprae. A strong host genetic contribution to leprosy susceptibility is well established. However, the modulation of the transcriptional response to infection and the mechanism(s) of disease control are poorly understood. To address this gap in knowledge of leprosy pathogenicity, we conducted a genome-wide search for expression quantitative trait loci (eQTL) that are associated with transcript variation before and after stimulation with M. leprae sonicate in whole blood cells...
August 9, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28763601/leprosy-an-overview-of-clinical-features-diagnosis-and-treatment
#5
Marcellus Fischer
Leprosy is a chronic infectious disease caused by Mycobacterium (M.) leprae. Worldwide, 210,758 new cases were diagnosed in 2015. The highest incidence is found in India, Brazil, and Indonesia. While the exact route of transmission remains unknown, nasal droplet infection is thought to be most likely. The pathogen primarily affects the skin and peripheral nervous system. The disease course is determined by individual host immunity. Clinically, multibacillary lepromatous variants are distinguished from paucibacillary tuberculoid forms...
August 2017: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/28763600/lepra-ein-%C3%A3-berblick-%C3%A3-ber-klinik-diagnose-und-therapie
#6
Marcellus Fischer
No abstract text is available yet for this article.
August 2017: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/28735303/acid-fast-bacterium-detection-and-identification-from-paraffin-embedded-tissues-using-a-pcr-pyrosequencing-method
#7
Jian R Bao, Richard B Clark, Ronald N Master, Kileen L Shier, Lynn L Eklund
AIMS: Acid-fast bacterium (AFB) identification from formalin-fixed paraffin-embedded (FFPE) tissues is challenging and may not be readily available to the clinical laboratory. A method to detect and identify AFB from FFPE tissues using PCR and pyrosequencing (PCR-Seq) was developed and evaluated. METHODS: The method was validated using spiked cell-clotted paraffin blocks before use with patients' specimens. DNA was extracted from tissue sections, and a 16S rRNA gene fragment was amplified and a signature sequence was produced on a PyroMark ID system...
July 22, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28715914/leprosy-in-a-lombard-avar-cemetery-in-central-italy-campochiaro-molise-6th-8th-century-ad-ancient-dna-evidence-and-demography
#8
Mauro Rubini, Paola Zaio, Mark Spigelman, Helen D Donoghue
BACKGROUND: The study of past infectious diseases increases knowledge of the presence, impact and spread of pathogens within ancient populations. AIM: Polymerase chain reaction (PCR) was used to examine bones for the presence of Mycobacterium leprae ancient DNA (aDNA) as, even when leprosy is present, bony changes are not always pathognomonic of the disease. This study also examined the demographic profile of this population and compared it with two other populations to investigate any changes in mortality trends between different infectious diseases and between the pre-antibiotic and antibiotic eras...
July 17, 2017: Annals of Human Biology
https://www.readbyqxmd.com/read/28707598/protein-tagging-destruction-and-infection
#9
Chetana Bhaskarla, Manoj Bhosale, Pip Banerjee, Nagasuma Chandra, Dipankar Nandi
Cells possess protein quality control mechanisms to maintain proper cellular homeostasis. In eukaryotes, the roles of the ubiquitination and proteasome-mediated degradation of cellular proteins is well established. Recent studies have elucidated protein tagging mechanisms in prokaryotes, involving transfer messenger RNA (tmRNA) and pupylation. In this review, newer insights and bioinformatics analysis of two distinct bacterial protein tagging machineries are discussed. The machinery for tmRNA-mediated tagging is present in several eubacterial representatives, e...
July 13, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28700682/circumscription-of-the-genus-lepra-a-recently-resurrected-genus-to-accommodate-the-variolaria-group-of-pertusaria-sensu-lato-pertusariales-ascomycota
#10
Xinli Wei, Imke Schmitt, Brendan Hodkinson, Adam Flakus, Martin Kukwa, Pradeep K Divakar, Paul M Kirika, Jürgen Otte, Anjuli Meiser, H Thorsten Lumbsch
Pertusarialean lichens include more than 300 species belonging to several independent phylogenetic lineages. Only some of these phylogenetic clades have been comprehensively sampled for molecular data, and formally described as genera. Here we present a taxonomic treatment of a group of pertusarialean lichens formerly known as "Pertusaria amara-group", "Monomurata-group", or "Variolaria-group", which includes widespread and well-known taxa such as P. amara, P. albescens, or P. ophthalmiza. We generated a 6-locus data set with 79 OTUs representing 75 species...
2017: PloS One
https://www.readbyqxmd.com/read/28693856/innovative-tools-and-approaches-to-end-the-transmission-of-mycobacterium-leprae
#11
REVIEW
Peter Steinmann, Steven G Reed, Fareed Mirza, T Déirdre Hollingsworth, Jan Hendrik Richardus
Leprosy control has seen little innovation and only limited progress in the past decade. However, research on the disease has increased and important innovations are underway. Here, we comment on efforts to develop tools and approaches to detect leprosy and to stop the transmission of Mycobacterium leprae, the causative bacillus of the disease. The tracing and screening of contacts of known patients with leprosy promises to strengthen early diagnosis, while preventive chemotherapy will reduce the risk of contacts developing the disease by 50-60% within 2 years of administration...
July 7, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28693853/multidrug-therapy-for-leprosy-a-game-changer-on-the-path-to-elimination
#12
REVIEW
Cairns S Smith, Ann Aerts, Paul Saunderson, Joseph Kawuma, Etsuko Kita, Marcos Virmond
Leprosy is present in more than 100 countries, where it remains a major cause of peripheral neuropathy and disability. Attempts to eliminate the disease have faced various obstacles, including characteristics of the causative bacillus Mycobacterium leprae: the long incubation period, limited knowledge about its mode of transmission, and its poor growth on culture media. Fortunately, the leprosy bacillus is sensitive to several antibiotics. The first antibiotic to be widely used for leprosy treatment was dapsone in the 1950s, which had to be taken over several years and was associated with increasing bacterial resistance...
July 7, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28684130/indoleamine-2-3-dioxygenase-and-iron-are-required-for-mycobacterium-leprae-survival
#13
Mayara Garcia de Mattos Barbosa, Rhana Berto da Silva Prata, Priscila Ribeiro Andrade, Helen Ferreira, Bruno Jorge de Andrade Silva, Jéssica Araújo da Paixão de Oliveira, Tayná Quintella Assis, Thiago Gomes de Toledo-Pinto, Ohanna Cavalcanti de Lima Bezerra, José Augusto da Costa Nery, Patricia Sammarco Rosa, Marcelo Torres Bozza, Flávio Alves Lara, Milton Ozório Moraes, Veronica Schmitz, Euzenir Nunes Sarno, Roberta Olmo Pinheiro
Our previous study has demonstrated that IL-10 may modulate both indoleamine 2,3-dioxygenase (IDO) and CD163 expression in lepromatous leprosy (LL) cells, favoring Mycobacterium leprae persistence through induction of regulatory pathways and iron storage. Here, we observed that in LL lesion cells there is an increase in the expression of proteins involved in iron metabolism such as hemoglobin (Hb), haptoglobin, heme oxygenase 1 and transferrin receptor 1 (TfR1) when compared to tuberculoid leprosy (BT) cells...
July 3, 2017: Microbes and Infection
https://www.readbyqxmd.com/read/28680225/type-2-lepra-reaction-presenting-as-fever-of-unknown-origin-identified-on-18-f-fluoro-2-deoxyglucose-positron-emission-tomography-computed-tomography
#14
Piyush Chandra, Satish Nath, Srinivas Chakravarthy, Jemima Kingsley
No abstract text is available yet for this article.
July 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28636650/the-formation-of-lipid-droplets-favors-intracellular-mycobacterium-leprae-survival-in-sw-10-non-myelinating-schwann-cells
#15
Song-Hyo Jin, Sung-Kwan An, Seong-Beom Lee
Leprosy is a chronic infectious disease that is caused by the obligate intracellular pathogen Mycobacterium leprae (M.leprae), which is the leading cause of all non-traumatic peripheral neuropathies worldwide. Although both myelinating and non-myelinating Schwann cells are infected by M.leprae in patients with lepromatous leprosy, M.leprae preferentially invades the non-myelinating Schwann cells. However, the effect of M.leprae infection on non-myelinating Schwann cells has not been elucidated. Lipid droplets (LDs) are found in M...
June 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28633333/anti-natural-octyl-disaccharide-leprosy-idri-diagnostic-ndo-lid-antibodies-as-indicators-of-leprosy-reactions-and-neuritis
#16
Héctor Serrano-Coll, Mónica Muñoz, Juan Camilo Beltrán, Malcolm S Duthie, Nora Cardona-Castro
Background: Leprosy is a complex infectious and neurological disease caused by Mycobacterium leprae. Nerve damage is related to immunological hypersensitivity responses known as leprosy reactions (LRs). Diagnostic tools to predict LRs are not available. We hypothesized that natural octyl disaccharide-leprosy IDRI diagnostic (NDO-LID) would be helpful as an indicator of LRs and neuritis. Methods: To assess the utility of NDO-LID in indicating reactions, ELISA were used to detect specific antibodies in serum samples from 80 Colombian leprosy patients (40 with and 40 without history of LRs)...
March 1, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28617800/whole-genome-sequencing-distinguishes-between-relapse-and-reinfection-in-recurrent-leprosy-cases
#17
Mariane M A Stefani, Charlotte Avanzi, Samira Bührer-Sékula, Andrej Benjak, Chloé Loiseau, Pushpendra Singh, Maria A A Pontes, Heitor S Gonçalves, Emerith M Hungria, Philippe Busso, Jérémie Piton, Maria I S Silveira, Rossilene Cruz, Antônio Schetinni, Maurício B Costa, Marcos C L Virmond, Suzana M Diorio, Ida M F Dias-Baptista, Patricia S Rosa, Masanori Matsuoka, Maria L F Penna, Stewart T Cole, Gerson O Penna
BACKGROUND: Since leprosy is both treated and controlled by multidrug therapy (MDT) it is important to monitor recurrent cases for drug resistance and to distinguish between relapse and reinfection as a means of assessing therapeutic efficacy. All three objectives can be reached with single nucleotide resolution using next generation sequencing and bioinformatics analysis of Mycobacterium leprae DNA present in human skin. METHODOLOGY: DNA was isolated by means of optimized extraction and enrichment methods from samples from three recurrent cases in leprosy patients participating in an open-label, randomized, controlled clinical trial of uniform MDT in Brazil (U-MDT/CT-BR)...
June 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28602616/salivary-anti-pgl-1-igm-may-indicate-active-transmission-of-mycobacterium-leprae-among-young-people-under-16-years-of-age
#18
Alexandre Casimiro de Macedo, José Evandro Cunha, Juliana Navarro Ueda Yaochite, Clodis Maria Tavares, Aparecida Tiemi Nagao-Dias
Considering that the main route of Mycobacterium leprae transmission is the upper respiratory tract, detection of salivary antibodies can be a useful tool for diagnosing early infection. The study aimed to analyze salivary anti-PGL-1 IgA and IgM antibodies in 169 children aged 4-16 years old, who lived nearby or inside the house of multibacillary or paucibacillary leprosy patients in two endemic cities in Alagoas State - Brazil. Salivary anti-PGL-1 antibodies were quantified by modified ELISA method. The frequency of contact and clinical form of the index case were significantly associated with salivary antibodies levels...
June 8, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28584985/dnahsp65-vaccine-as-therapy-against-paracoccidioidomycosis
#19
Alice M Ribeiro, André C Amaral, Maria Sueli S Felipe, Anamelia L Bocca
The conventional treatment for fungal diseases usually shows long periods of therapy and the high frequency of relapses and sequels. New strategies of the treatment are necessary. We have shown that the Mycobacterium leprae HSP65 gene can be successfully used as therapy against murine Paracoccidioidomycosis (PCM). Here, we described the methodology of DNAhsp65 immunotherapy in mice infected with the dimorphic fungus Paracoccidioides brasiliensis, one of PCM agent, evaluating cytokines levels, fungal burden, and lung injury...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28571290/leprosy-in-an-eight-year-old-child-an-exceptional-case-with-unusual-oral-manifestation
#20
Mayuri Jain
Leprosy is a contagious and granulomatous disease which is caused by Mycobacterium leprae. The incubation period for leprosy is five to seven years and it can take as long as about 30 years before signs and symptoms of leprosy develop in some patients. It is a chronic systemic disease which mostly affects the skin and peripheral nerves. It has been seen that indeterminate leprosy is the most common type seen in childhood followed by tuberculoid variant. Borderline lepromatous and lepromatous leprosy are only occasionally encountered in children and rarely affects the oral cavity...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
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