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https://www.readbyqxmd.com/read/28932316/penile-melanosis-associated-with-lichen-sclerosus-et-atrophicus-first-description-in-the-medical-literature
#1
Georgi Tchernev, Anastasiya Atanasova Chokoeva, Hristo Mangarov
We present a 74-year-old male patient with 3-years history of visible discoloration of the glans penis, without subjective complaints. Histopathological examination after incision biopsy revealed a moderate increase in the number of melanocytes in the basal layer with irregular distribution, without melanocytic nests, melanophages in the superficial dermis, and subepidermal sclerosus. No cytologic atypia of melanocytes was detectable. The diagnosis of melanosis of the genitalia in association with lichen sclerosus was made...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28932068/familial-cicatricial-alopecia-report-of-familial-frontal-fibrosing-alopecia-and-fibrosing-alopecia-in-a-pattern-distribution
#2
Dandara Meurer Missio, Maria Fernanda Reis Gavazzoni Dias, Ralph Michel Trüeb
Frontal fibrosing alopecia (FFA) and fibrosing alopecia in a pattern distribution (FAPD) as originally reported by Kossard in 1994 and by Zinkernagel and Trüeb in 2000, respectively, represent two distinct patterns of cicatricial pattern hair loss. Both share a patterned distribution and histological evidence of a lichenoid follicular inflammation with fibrosis. FFA is characterized by a marginal alopecia along the frontotemporal hairline, and FAPD by a progressive alopecia of the centroparietal scalp. Since the original reports, evidence has accumulated that there exists considerable clinical overlap among FFA, FAPD, and lichen planopilaris, with coexistence of features of the three conditions within the same individual...
July 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28932062/primary-idiopathic-pseudopelade-of-brocq-in-a-young-child
#3
Pragya Ashok Nair, Rochit Singhal, Kira Pariath
Pseudopelade of Brocq (PPB) is a rare, chronic, slowly progressive cicatricial alopecia that generally affects middle-aged women. Vertex and parietal scalp are commonly involved. It can be primary or secondary to end stage of other scarring alopecia such as lichen planopilaris and discoid lupus erythematosus. It is diagnosed by exclusion both clinically and trichoscopy. There is no standard treatment for PPB. We hereby report a case of rapidly progressing primary idiopathic pseudopelade of Brocq in a young female child confirmed by trichoscopy and histopathology...
July 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28932029/validation-of-immunoexpression-of-tenascin-c-in-oral-precancerous-and-cancerous-tissues-using-imagej-analysis-with-novel-immunohistochemistry-profiler-plugin-an-immunohistochemical-quantitative-analysis
#4
Deepa Rajesh Mane, Alka D Kale, Chetan Belaldavar
BACKGROUND: Immunohistochemistry (IHC) is a molecular technique that has grown tremendously over the years. However, the assessment is only qualitative which is subjective and causes errors. Due to this limitation, several excellent markers have not gained importance and reached clinical trials. Hence, we aimed to quantify IHC by ImageJ analysis with a novel IHC profiler plugin. ImageJ has not been tried in oral precancerous tissues with minimal attempt for matrix markers. AIM: This study aimed to validate the quantification of immunoexpression of tenascin-C (TN-C) in oral precancerous tissues and oral squamous cell carcinoma (OSCC) using ImageJ software with IHC profiler plugin...
May 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/28930696/impact-of-a-newly-formed-periglacial-environment-and-other-factors-on-fresh-water-chemistry-at-the-western-shore-of-admiralty-bay-in-the-summer-of-2016-king-george-island-maritime-antarctica
#5
Małgorzata Szopińska, Danuta Szumińska, Robert Józef Bialik, Stanisław Chmiel, Joanna Plenzler, Żaneta Polkowska
This study provides a comprehensive analysis of the inorganic chemistry of flowing water at the western shore of Admiralty Bay. In the water samples, ions, and major and trace metals (and B) were detected and quantified. Additionally, the parameters of pH, specific electrolytic conductivity (SEC25) and total organic carbon (TOC) were determined. Moreover, multivariate data set was created and Principal Component Analysis (PCA) was performed. Generally, the water has low total content of the measured mineral constituents <100mgL(-1)...
September 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28927934/the-calcium-binding-protein-epann-from-the-lichenized-fungus-endocarpon-pusillum-enhances-stress-tolerance-in-yeast-and-plants
#6
Yongli Zhang, Hui Li, Yanyan Wang, Jiangchun Wei
Annexins are calcium-phospholipid binding proteins that play a significant role in the Ca(2+) signaling pathway. These proteins are essential for plants to effectively respond to abiotic stresses. However, their functions and mechanisms remain largely unknown in fungi. In this study, an annexin gene, Epann, was cloned from the lichenized fungus Endocarpon pusillum, a drought resistant organism. Our results showed that Epann was induced by several abiotic stresses in E. pusillum. Heterologous expression of the Epann gene enhanced the stress tolerance of Saccharomyces cerevisiae...
September 16, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28927766/vulvovaginitis-presentation-of-more-common-problems-in-pediatric-and-adolescent-gynecology
#7
REVIEW
Meredith Loveless, Ohmar Myint
Vulvovaginitis is one of the most common gynecological complaints presenting in the pediatric and adolescent female. The common causes of vulvovaginitis in the pediatric patient differ than that considered in adolescent females. When a child present with vulvar itching, burning and irritation the most common etiology is non-specific and hygiene measures are recommended. However these symptoms can mimic more serious etiologies including infection, labial adhesion, lichen sclerosis, pinworms and foreign body must be considered...
September 5, 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28922940/linear-lichen-planus-continuum-from-skin-to-mucosa
#8
Mikhin George Thomas, Ambooken Betsy
Lichen planus (LP) is a chronic inflammatory disorder that most commonly affects middle-aged individuals. LP involves the skin and/or mucous membranes, including oral, vulvovaginal, esophageal, laryngeal, and conjunctival mucosa. Linear LP, a rare distinct variant of LP, is characterised by pruritic eruption of lichenoid and violaceous papules in a linear distribution. We report an unusual presentation of linear LP in a 14-year-old child that extended from the left anterior nares to upper lip and into the oral mucosa up to the upper gum margin...
September 1, 2017: Journal of Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/28917728/fast-method-for-the-simultaneous-determination-of-monomethylmercury-and-inorganic-mercury-in-rice-and-aquatic-plants
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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