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https://www.readbyqxmd.com/read/28917728/fast-method-for-the-simultaneous-determination-of-monomethylmercury-and-inorganic-mercury-in-rice-and-aquatic-plants
#1
María Jiménez-Moreno, Miguel Ángel Lominchar, María José Sierra, Rocío Millán, Rosa Carmen Rodríguez Martín-Doimeadios
Recent investigations revealed that monomethylmercury (MMHg) can be absorbed and accumulated by plants, i.e. rice crops, thus becoming an important route of human exposure to MMHg through diet. The increasing concern about this fact makes that appropriate analytical methods for Hg speciation in these samples are urgently required. Therefore, the aim of this work has been the development of a fast and sensitive method which enables the simultaneous determination of MMHg and inorganic Hg in rice and aquatic plants...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28914773/vitamin-d-nutritional-status-and-its-related-factors-for-chinese-children-and-adolescents-in-2010-2012
#2
Yichun Hu, Jing Chen, Rui Wang, Min Li, Chunfeng Yun, Weidong Li, Yanhua Yang, Jianhua Piao, Xiaoguang Yang, Lichen Yang
Vitamin D plays a critical role in calcium and phosphate metabolism and helps maintain skeletal integrity in childhood, yet vitamin D status in Chinese children and adolescents is not well documented. The aim of this study was to assess the vitamin D status and analyze the risk factors for vitamin D deficiency in Chinese children and adolescents aged 6-17 years. Serum 25 hydroxyvitamin D (25(OH)D) was measured with a radioimmunoassay kit in 15,000 children and adolescent participants in the Chinese national nutrition and health survey (CNNHS) 2010-2012...
September 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28914318/analytical-numerical-and-experimental-studies-of-viscoelastic-effects-on-the-performance-of-soft-piezoelectric-nanocomposites
#3
Jing Li, Zhiren Zhu, Lichen Fang, Shu Guo, Ugur Erturun, Zeyu Zhu, James E West, Somnath Ghosh, Sung Hoon Kang
Piezoelectric composite (p-NC) made of a polymeric matrix and piezoelectric nanoparticles with conductive additives is an attractive material for many applications. As the matrix of p-NC is made of viscoelastic materials, both elastic and viscous characteristics of the matrix are expected to contribute to the piezoelectric response of p-NC. However, there is limited understanding of how viscoelasticity influences the piezoelectric performance of p-NC. Here we combined analytical and numerical analyses with experimental studies to investigate effects of viscoelasticity on piezoelectric performance of p-NC...
September 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28906049/alitretinoin-treatment-of-lichen-amyloidosis
#4
Won Seon Koh, Eui Hyun Oh, Jeong Eun Kim, Young Suck Ro
Lichen amyloidosis (LA) is characterized by the deposition of amyloid that may respond to chronic scratching that may be secondary to atopic dermatitis, stasis dermatitis, or interface dermatitis. Despite the development of several therapeutic strategies, including topical steroids, oral antihistamines, cyclosporine, and retinoids, an effective treatment for LA has not been established. A 49-year-old woman who has been treated irregularly for atopic dermatitis for 7 years presented with localized brownish papules on the left forearm and right elbow...
September 14, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/28905092/drug-induced-oral-lichenoid-reactions-a-real-clinical-entity-a-systematic-review
#5
REVIEW
Giulio Fortuna, Massimo Aria, Julie H Schiavo
PURPOSE: Drug-induced oral lichenoid reactions (DIOLRs) have been extensively reported in the literature, but the validity of the causality relationship between any drug and the oral lichenoid lesions (OLLs) still remains questionable. We sought to determine whether this causality relationship really exists, whether a resolution of the oral lesions upon withdrawal occurs, and what the most common alleged offending medications are. METHODS: Nine electronic databases from January 1966 to December 2016 were systematically searched to identify all relevant studies selected with specific inclusion criteria (a clinical and histopathological diagnosis of DIOLRs, and clearly statement on the systemic offending medication)...
September 13, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28904313/immune-receptors-cd40-and-cd86-in-oral-keratinocytes-and-implications-for-oral-lichen-planus
#6
Alison Marshall, Antonio Celentano, Nicola Cirillo, Michiko Mirams, Michael McCullough, Stephen Porter
Lichen planus (LP) is a chronic T-cell-mediated mucocutaneous inflammatory disease that targets stratified epithelia, including those lining the oral cavity. The intraoral variant of LP (OLP) is associated with interferon (IFN)-γ production by infiltrating T lymphocytes; however, the role of epithelial cells in the etiopathogenesis OLP is not completely understood. There is however a growing body of evidence regarding the involvement of epithelial-derived cytokines, immune receptors, and costimulatory molecules in the pathobiological processes that promote and sustain OLP...
2017: Journal of Oral Science
https://www.readbyqxmd.com/read/28898764/sensitive-analysis-of-bioactive-secondary-metabolites-in-lichen-species-using-liquid-chromatography-mass-spectrometry
#7
Syed Ghulam Musharraf, Fareeha Siddiqi, Arslan Ali, Vinitha Moolchand Thadhani
Lichens are a large group of valuable lower plants with unique features and diverse applications worldwide such as in medicine, cosmetics, food, and textile industries. They are also well known for their potential in observing climate and environmental monitoring. Their successful exploitations require reliable analytical methods to check and maintain quality and efficacy of the products based on them. This study focuses on the development of a sensitive and reliable quantification method for the analysis of important depsides, depsidones, dibenzofuran and monocyclic phenols inseven known and an unidentified lichen species...
August 13, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28898420/characterization-of-hyperbranched-core-multishell-nanocarriers-as-an-innovative-drug-delivery-system-for-the-application-at-the-oral-mucosa
#8
J Jager, K Obst, S B Lohan, J Viktorov, S Staufenbiel, H Renz, M Unbehauen, R Haag, S Hedtrich, C Teutloff, M C Meinke, K Danker, H Dommisch
BACKGROUND AND OBJECTIVES: In the oral cavity, the mucosal tissues may develop a number of different pathological conditions, such as inflammatory diseases (gingivitis, periodontitis) and autoimmune disorders (eg, oral lichen planus) that require therapy. The application of topical drugs is one common therapeutic approach. However, their efficacy is limited. Dilution effects due to saliva hinder the adherence and the penetration of drug formulations. Therefore, the bioavailability of oral topical drugs is insufficient, and patients may suffer from disease over years, if not life-long...
September 12, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28895668/concepts-and-controversies-in-the-treatment-of-cutaneous-lichen-planus-a-review
#9
Charles Puza, Adela R Cardones
Cutaneous lichen planus (CLP) is a chronic autoimmune disease classically associated with severely pruritic, polygonal, violaceous, flat-topped papules and plaques. Subtypes such as hypertrophic and bullous lichen planus and lichen planus pigmentosus have been described. Treatment can be challenging, and prospective controlled studies are lacking. Corticosteroids remain the major options for topical and systemic treatment, although some non-steroidal options exist. Phototherapy, especially with narrow band ultraviolet B (NB-UVB), is effective, but caution must be taken because of the risk of keobnerization...
September 12, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/28894255/multiple-streptomyces-species-with-distinct-secondary-metabolomes-have-identical-16s-rrna-gene-sequences
#10
Sanjay Antony-Babu, Didier Stien, Véronique Eparvier, Delphine Parrot, Sophie Tomasi, Marcelino T Suzuki
Microbial diversity studies using small subunit (SSU) rRNA gene sequences continue to advance our understanding of biological and ecological systems. Although a good predictor of overall diversity, using this gene to infer the presence of a species in a sample is more controversial. Here, we present a detailed polyphasic analysis of 10 bacterial strains isolated from three coastal lichens Lichina confinis, Lichina pygmaea and Roccella fuciformis with SSU rRNA gene sequences identical to the type strain of Streptomyces cyaneofuscatus...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28892974/squamous-cell-carcinoma-penis-in-a-case-of-urethral-stricture-due-to-lichen-sclerosus-balanitis-xerotica-obliterans-a-case-report-and-review-of-literature
#11
Yogesh Taneja, Priyatama Ram, Santosh Kumar Dhaked, Tridib Kumar Sen
Penile carcinoma is considered a delayed sequel of lichen sclerosus. It is important to recognize this not so uncommon complication in time as survival of patients with Squamous Cell Carcinoma (SCC) depends on early diagnosis and treatment. We describe a case of a 49-year-old male presenting with urethral stricture due to lichen sclerosus. He was treated for stricture disease and later on developed SCC penis after ten years of presentation.
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892165/environment-and-host-identity-structure-communities-of-green-algal-symbionts-in-lichens
#12
Francesco Dal Grande, Gregor Rolshausen, Pradeep K Divakar, Ana Crespo, Jürgen Otte, Matthias Schleuning, Imke Schmitt
An understanding of how biotic interactions shape species' distributions is central to predicting host-symbiont responses under climate change. Switches to locally adapted algae have been proposed to be an adaptive strategy of lichen-forming fungi to cope with environmental change. However, it is unclear how lichen photobionts respond to environmental gradients, and whether they play a role in determining the fungal host's upper and lower elevational limits. Deep-coverage Illumina DNA metabarcoding was used to track changes in the community composition of Trebouxia algae associated with two phylogenetically closely related, but ecologically divergent fungal hosts along a steep altitudinal gradient in the Mediterranean region...
September 11, 2017: New Phytologist
https://www.readbyqxmd.com/read/28888649/identification-of-two-novel-avian-influenza-a-h5n6-viruses-in-wild-birds-shanghai-in-2016
#13
Guimei He, Lichen Zhou, Caihui Zhu, Hongliang Shi, Xiaofang Li, Di Wu, Jing Liu, Jiamin Lv, Chuanxia Hu, Zhihui Li, Zhenghuan Wang, Tianhou Wang
The H5N6 avian influenza virus (AIV) has been continuously reported in wild birds, which may contribute to further geographical spread during their long-distance migrations. Active AIV surveillance in wild birds was conducted during October and November 2016 in Shanghai, China. Two novel influenza A (H5N6) viruses were detected in samples from migratory waterfowl that are genetically similar to recent South Korea and Japan H5N6 viruses collected in 2016 and 2017, highlighting the role of migratory waterfowl in the dissemination of H5N6 viruses along migratory flyways...
September 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28887754/lichen-derived-caperatic-acid-and-physodic-acid-inhibit-wnt-signaling-in-colorectal-cancer-cells
#14
Jarosław Paluszczak, Robert Kleszcz, Elżbieta Studzińska-Sroka, Violetta Krajka-Kuźniak
Lichens are a source of secondary metabolites which possess important biological activities, including antioxidant, antibacterial, anti-inflammatory, and cytotoxic effects. The anticancer activity of lichens was shown in many types of tumors, including colorectal cancers (CRC). Several studies revealed that the application of lichen extracts diminished the proliferation of CRC cells and induced apoptosis. Colon carcinogenesis is associated with aberrations in Wnt signaling. Elevated transcriptional activity of β-catenin induces cell survival, proliferation, and migration...
September 8, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28886585/human-papillomavirus-infection-in-oral-potentially-malignant-disorders-and-cancer
#15
REVIEW
Xun Chen, Yu Zhao
Human papillomavirus (HPV) infects keratinocytes in the mucosa or skin, and persistent infection with HPV may lead to premalignant lesions and invasive cancer, especially cervical cancer. It has also been hypothesized that HPV infection is an etiological factor of oral squamous cell carcinoma and oral precancerous disorders such as lichen planus, leukoplakia, and erythroplakia. A high percentage of HPV in oral lesions supports the possible viral contribution, but an association of HPV infection with these lesions remains to be established...
August 26, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28884911/final-diagnosis-of-112-girls-presenting-with-genital-mucocutaneous-symptoms-and-signs-the-mayo-clinic-experience
#16
Caoimhe M R Fahy, Rochelle R Torgerson, Mark D P Davis
Pediatric genital mucocutaneous diseases are rare. A retrospective review was performed of children presenting with symptomatology of genital dermatoses to a hospital-based dermatology service. This study highlights that the range of genital diseases in children is not as broad as in adults. The diagnosis of genital mucocutaneous disease in children is usually genital lichen sclerosus, but other diagnoses should be considered.
September 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28883777/importance-of-early-detection-of-potentially-malignant-lesions-in-the-prevention-of-oral-cancer
#17
Sanja Hadzic, Mirjana Gojkov-Vukelic, Enes Pasic, Almir Dervisevic
OBJECTIVE: The aim of this study was to assess the importance of early diagnosis of potentially malignant lesions in the prevention of oral cancer. MATERIAL AND METHODS: In order to achieve the set objectives, we selected our participant pool. Of the 340 patients who came to the initial examination at the Clinic for Oral Medicine and Periodontology, we selected 40 patients with potentially malignant oral lesions (PMOL) of both sexes and of different ages. After an extensive anamnesis and a clinical examination of all mucous membranes, we documented potentially malignant lesions, their localization, subjective and objective symptoms, duration of pathological lesion, and bad habits (smoking and alcohol)...
June 2017: Materia Socio-medica
https://www.readbyqxmd.com/read/28882460/elemental-and-radiological-characterization-of-commercial-cetraria-islandica-l-acharius-pharmaceutical-and-food-supplementation-products
#18
M A Meli, D Desideri, C Cantaluppi, F Ceccotto, L Feduzi, C Roselli
An elemental and radiological characterization was performed on Cetraria islandica (L.) Ach. pharmaceutical and food supplementation products purchased in local specialty shops in Italy. Essential elements (K, Ca, P, S, Cl, Mn, Fe, Cu, Zn, Ni, Br, I) and nonessential or toxic elements (Al, Ti, Si, Rb, Sr, As, Cd, Sn, and Pb) were determined by Energy Dispersive Polarized X-Ray Fluorescence Spectrometry; natural radionuclides ((238)U, (234)U, (230)Th, (210)Po, (232)Th, and (228)Th) were determined by alpha spectrometry...
September 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28879190/primary-scarring-alopecia-clinical-pathological-review-of-72-cases-and-review-of-the-literature
#19
Salvador Villablanca, Cristián Fischer, S Cecilia García-García, J Manuel Mascaró-Galy, Juan Ferrando
PURPOSE OF THE STUDY: To analyze the epidemiologic, demographic, clinical, and histological characteristics of primary scarring alopecia (PSA) cases diagnosed over a 7-year period at the Department of Dermatology, Hospital Clinic, Barcelona, Spain. PROCEDURES: Seventy-two patients diagnosed with PSA between 2006 and 2012 were included. Age, sex, ethnic group, clinical pattern, predominant histological infiltrate, final clinical diagnosis, time of onset, treatments used, and clinical evolution were evaluated and correlated...
August 2017: Skin Appendage Disorders
https://www.readbyqxmd.com/read/28879188/the-use-of-direct-immunofluorescence-in-frontal-fibrosing-alopecia
#20
Aline Donati, Aditya K Gupta, Carolina Jacob, Benedicte Cavelier-Balloy, Pascal Reygagne
BACKGROUND: Frontal fibrosing alopecia (FFA) differs from lichen planopilaris (LPP) in many clinical aspects, but histology fails to distinguish between these entities. Direct immunofluorescence (DIF) is a diagnostic technique used for autoimmune diseases, including those affecting skin and hair. OBJECTIVE: To characterize DIF patterns in patients with FFA. METHOD: Data was collected retrospectively from FFA cases presenting to the Centre de Santé Sabouraud Hair Clinic in Paris from November 2013 to November 2014...
August 2017: Skin Appendage Disorders
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