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https://www.readbyqxmd.com/read/28428847/lichen-acclimation-to-changing-environments-photobiont-switching-vs-climate-specific-uniqueness-in-psora-decipiens
#1
Laura Williams, Claudia Colesie, Anna Ullmann, Martin Westberg, Mats Wedin, Burkhard Büdel
Unraveling the complex relationship between lichen fungal and algal partners has been crucial in understanding lichen dispersal capacity, evolutionary processes, and responses in the face of environmental change. However, lichen symbiosis remains enigmatic, including the ability of a single fungal partner to associate with various algal partners. Psora decipiens is a characteristic lichen of biological soil crusts (BSCs), across semi-arid, temperate, and alpine biomes, which are particularly susceptible to habitat loss and climate change...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28426984/biomagnetic-monitoring-and-element-content-of-lichen-transplants-in-a-mixed-land-use-area-of-ne-italy
#2
Danijela Kodnik, Aldo Winkler, Fabio Candotto Carniel, Mauro Tretiach
The aim of this study was to verify whether it is possible to discriminate between the different pollution sources present in a mixed land use area of NE Italy on the basis of the magnetic properties and the element content of lichen transplants. Thalli of Pseudevernia furfuracea were collected in a pristine area of the South-Eastern Alps and exposed for 2months in 40 sites located at the knots of a 700m step grid covering ca. 40km(2) of a mosaic of agricultural, forested, industrial and urban areas. In this way, the samples could be analyzed after a defined period of time, and compared to pre-exposure conditions...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28425240/oral-lichen-planus-a-4-year-clinical-follow-up-study
#3
Arūnas Rimkevičius, Jolanta Aleksejūnienė, Alina Pūrienė, Dmitrij Šeinin, Rūta Rastenienė
BACKGROUND/AIM: This study aimed to examine oral lichen planus (OLP) cases histopathologically and cytologically, describe different clinical aspects of OLP manifestations, and associate different OLP clinical forms with self-reported oral health and with local and systemic risk factors. MATERIALS AND METHODS: All patients with a referral diagnosis of OLP received biopsies. The histological evaluation assessed infiltration with lymphocytes, epithelial hyperplasia, and hyperkeratosis...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28424204/a-species-on-a-tightrope-establishment-limitations-of-an-endangered-lichen-in-a-fragmented-mediterranean-landscape
#4
Juan Luis H Cardós, Gregorio Aragón, Isabel Martínez
PREMISE OF THE STUDY: Habitat loss and forest fragmentation affect the dispersal and establishment of species. Furthermore, populations growing far from the species' optimal climate might be less viable because good-quality habitat can be scarce and easily altered by smaller changes. The lichen Pectenia plumbea has oceanic climatic requirements, so in the Mediterranean region it needs the humidity provided by well-preserved forests to thrive, but most of this habitat has disappeared and the remnants are fragmented...
April 19, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28422565/ascorbic-acid-deficiency-in-patients-with-lichen-planus
#5
Ilinca Nicolae, Cristina Iulia Mitran, Madalina Irina Mitran, Corina Daniela Ene, Mircea Tampa, Simona Roxana Georgescu
OBJECTIVES: Recent studies have highlighted the role of oxidative stress in the pathogenesis of lichen planus (LP). In the present study the interest of the authors is focused on the investigation of ascorbic acid status in patients with LP and identification of parameters that might influence the level of this vitamin. MATERIAL AND METHOD: We analyzed the level of urinary ascorbic acid (reflectometric method) in 77 patients with LP (cutaneous LP (CLP) - 49 cases, oral LP (OLP) - 28 cases) and 50 control subjects...
April 19, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28422057/antifungal-and-anti-biofilm-activities-of-acetone-lichen-extracts-against-candida-albicans
#6
Marion Millot, Marion Girardot, Lucile Dutreix, Lengo Mambu, Christine Imbert
Candida albicans is a commensal coloniser of the human gastrointestinal tract and an opportunistic pathogen, especially thanks to its capacity to form biofilms. This lifestyle is frequently involved in infections and increases the yeast resistance to antimicrobials and immune defenses. In this context, 38 lichen acetone extracts have been prepared and evaluated for their activity against C. albicans planktonic and sessile cells. Minimum inhibitory concentrations of extracts (MICs) were determined using the broth microdilution method...
April 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28415933/incidence-risk-factors-and-the-effect-of-polyomavirus-infection-in-hematopoietic-stem-cell-transplant-recipients
#7
Jianhua Hu, Siying Li, Meifang Yang, Lichen Xu, Xuan Zhang, Hong Zhao, Huihui Dong, Yaping Huang, Jun Fan, Lanjuan Li
Objective The effect of polyomavirus infection in HSCT recipients is poorly understood. Methods We evaluated 38 HSCT recipients. Polyomavirus was detected by nested qualitative polymerase chain reaction (PCR) assays of urine. The risk factors for BK virus and JC virus were analysed. The kidney and liver functions of infected and uninfected patients were compared. Results BK virus, JC virus, and simian virus 40 were detected in 21%, 42%, and 0% of HSCT recipients respectively. HCMV infection was found to be an independent risk factor for JC virus infection (odds ratio (OR): 8...
April 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28414193/generalized-lichen-nitidus-like-eruption-in-the-setting-of-mogamulizumab-and-tremelimumab
#8
Alvin W Li, Christine J Ko, Jonathan S Leventhal
No abstract text is available yet for this article.
April 17, 2017: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/28412610/overexpression-and-varied-clinical-significance-of-th9-versus-th17-cells-in-distinct-subtypes-of-oral-lichen-planus
#9
Hui Wang, Jingping Bai, Zhenhua Luo, Jie Fu, Hongjian Wang, Zheng Sun
OBJECTIVE: Oral lichen planus (OLP) presents with large numbers of T lymphocytes accumulating beneath the epithelium of the oral mucosa; however, its aetiology remains obscure. A potential role for an emerging novel T cell subset, Th9, in OLP has recently been suggested but remains to be clarified. The current aim was to investigate the expression and potential clinical significance of Th9 cells in distinct subtypes of OLP. MATERIALS AND METHODS: Peripheral blood samples were collected from 41 OLP patients and 18 healthy controls (HCs)...
April 7, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28410402/unexpected-associated-microalgal-diversity-in-the-lichen-ramalina-farinacea-is-uncovered-by-pyrosequencing-analyses
#10
Patricia Moya, Arántzazu Molins, Fernando Martínez-Alberola, Lucia Muggia, Eva Barreno
The current literature reveals that the intrathalline coexistence of multiple microalgal taxa in lichens is more common than previously thought, and additional complexity is supported by the coexistence of bacteria and basidiomycete yeasts in lichen thalli. This replaces the old paradigm that lichen symbiosis occurs between a fungus and a single photobiont. The lichen Ramalina farinacea has proven to be a suitable model to study the multiplicity of microalgae in lichen thalli due to the constant coexistence of Trebouxia sp...
2017: PloS One
https://www.readbyqxmd.com/read/28410381/qualitative-analysis-of-the-impact-of-oral-potentially-malignant-disorders-on-daily-life-activities
#11
Jyothi Tadakamadla, Santhosh Kumar, Ratilal Lalloo, Newell W Johnson
OBJECTIVE: To evaluate the impact of Oral Potentially Malignant Disorders (OPMD) on daily life activities. MATERIALS AND METHODS: Patients diagnosed with Oral Leukoplakia, Oral submucous fibrosis and Oral Lichen Planus attending the Oral Medicine clinic of Panineeya Institute of Dental Sciences & Research Centre, Hyderabad, India were invited to participate. Eighteen interviews and three focus groups were conducted in a non-clinical setting. Voice recordings were transcribed and translated from Telugu to English...
2017: PloS One
https://www.readbyqxmd.com/read/28409197/variation-in-biological-soil-crust-bacterial-abundance-and-diversity-as-a-function-of-climate-in-cold-steppe-ecosystems-in-the-intermountain-west-usa
#12
Erika S Blay, Stacy G Schwabedissen, Timothy S Magnuson, Ken A Aho, Peter P Sheridan, Kathleen A Lohse
Biological soil crust (biocrust) is a composite of mosses, lichens, and bacteria that performs many important soil system functions, including increasing soil stability, protecting against wind erosion, reducing nutrient loss, and mediating carbon and nitrogen fixation cycles. These cold desert and steppe ecosystems are expected to experience directional changes in both climate and disturbance. These include increased temperatures, precipitation phase changes, and increased disturbance from anthropogenic land use...
April 13, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28405495/biological-and-clinical-significance-of-tryptophan-catabolizing-enzymes-in-cutaneous-t-cell-lymphomas
#13
Pilvi Maliniemi, Kirsi Laukkanen, Liisa Väkevä, Katja Dettmer, Tuomas Lipsanen, Leila Jeskanen, Alban Bessede, Peter J Oefner, Marshall E Kadin, Annamari Ranki
Indoleamine 2,3-deoxygenase 1 (IDO1) induces immune tolerance in the tumor microenvironment (TME) and is recognized as a potential therapeutic target. We studied the expression of both IDO1 and the related tryptophan 2,3-dioxygenase (TDO) in several different subtypes of cutaneous T-cell lymphoma (CTCL), and evaluated the kynurenine (KYN) pathway in the local TME and in patient sera. Specimens from the total of 90 CTCL patients, including mycosis fungoides (MF, n = 37), lymphomatoid papulosis (LyP, n = 36), primary cutaneous anaplastic large cell lymphoma (pcALCL, n = 4), subcutaneous panniculitis-like T-cell lymphoma (SPTCL n = 13), and 10 patients with inflammatory lichen ruber planus (LRP), were analyzed by immunohistochemistry (IHC), immunofluorescence (IF), quantitative PCR, and/or liquid chromatography-tandem mass spectrometry (LC-MS/MS)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28402793/lichenomphalia-altoandina-a-new-species-of-hygrophoraceae-from-the-chilean-altiplano
#14
P Sandoval-Leiva, N Niveiro, R Urbina-Casanova, R Scherson
Lichenomphalia is a lichenized agaric genus characterized by its omphalinoid basidiomes. Lichenomphalia species are associated with unicellular green algae in the genus Coccomyxa and are mainly distributed in polar and alpine habitats. The aim of this work is to describe L. altoandina, a new species from northern Chile that grows among cushion plants over 3000 m above sea level in the Andes Mountains. The species is remarkable for living in highly saline environments, in some cases virtually on salt crusts...
2017: Mycologia
https://www.readbyqxmd.com/read/28401393/the-role-of-forest-in-mitigating-the-impact-of-atmospheric-dust-pollution-in-a-mixed-landscape
#15
Artur Santos, Pedro Pinho, Silvana Munzi, Maria João Botelho, José Manuel Palma-Oliveira, Cristina Branquinho
Atmospheric dust pollution, especially particulate matter below 2.5 μm, causes 3.3 million premature deaths per year worldwide. Although pollution sources are increasingly well known, the role of ecosystems in mitigating their impact is still poorly known. Our objective was to investigate the role of forests located in the surrounding of industrial and urban areas in reducing atmospheric dust pollution. This was tested using lichen transplants as biomonitors in a Mediterranean regional area with high levels of dry deposition...
April 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28400896/treatment-of-recalcitrant-erosive-oral-lichen-planus-and-desquamative-gingivitis-with-oral-apremilast
#16
Mohn'd AbuHilal, Scott Walsh, Neil Shear
BACKGROUND: Erosive oral lichen planus and desquamative gingivitis are uncommon but severe debilitating variants of oral lichen planus. Treatment of these presentations is difficult and challenging. MAIN OBSERVATION: A 44-year-old woman was referred to the dermatology clinic with chronic painful lichen planus-related gingivitis and buccal erosions. She has failed multiple treatments including topical clobetasol and tacrolimus, intralesional corticosteroids and several systemic and immunosuppressive agents...
November 30, 2016: Journal of Dermatological Case Reports
https://www.readbyqxmd.com/read/28400582/detection-of-ama-m2-in-human-saliva-potentials-in-diagnosis-and-monitoring-of-primary-biliary-cholangitis
#17
Chong Lu, Xianliang Hou, Minwei Li, Lin Wang, Ping Zeng, Hongyu Jia, Jianing Chen, Yingfeng Wei, Hong He, Xiangdong Liu, Hongyan Diao
Serum anti-mitochondrial antibody type 2 (AMA-M2) is considered as a pivotal biomarker for the diagnosis of primary biliary cholangitis (PBC). However, serological tests have many limitations, including inconvenience, invasiveness, and infection risks. Thus, a less invasive approach to detect AMA-M2 titer is desirable. We examined salivary AMA-M2 of potential PBC patients and found that AMA-M2 could be detected only in saliva of serum AMA-M2-positive PBC patients, but not in saliva of serum AMA-M2-negative PBC patients, oral lichen planus patients (OLP) patients, or healthy controls...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28397682/-oesophageal-stricture-caused-by-lichen-planus-and-intramural-pseudo-diverticulosis
#18
Jonas Sanberg Jensen, Jan Lindebjerg, Lars Stig Jørgensen
We present the rare case of a proximal oesophageal stricture caused by a combination of oesophageal lichen planus without any other manifestations and intramural pseudo-diverticulosis, resulting in significant dysphagia. The diagnosis was not reached until a second set of biopsies were performed after split-dose treatment with proton pump inhibitors. Although local corticosteroid treatment was unsuccessful and symptomatic relief was only achieved after endoscopic dilatation, this case emphasizes the importance of adequate biopsies in the diagnosis of oesophageal strictures...
February 6, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28396069/lichenoid-and-interface-dermatoses
#19
Alejandro A Gru, Andrea L Salavaggione
The terms 'lichenoid' and 'interface' dermatitis are often used interchangeably to describe an inflammatory pattern characterized histologically by damage to the basal keratinocytes in the epidermis. The mechanism of cell damage of such cells is now best understood as apoptosis, or programmed cell death. This inflammatory pattern of dermatoses, is also accompanied frequently by a band of lymphocytes and histiocytes in the superficial dermis, that often obscures the dermal-epidermal junction, hence the term 'lichenoid'...
March 22, 2017: Seminars in Diagnostic Pathology
https://www.readbyqxmd.com/read/28390309/thirty-years-after-chernobyl-long-term-determination-of-137-cs-effective-half-life-in-the-lichen-stereocaulon-vesuvianum
#20
F Savino, M Pugliese, M Quarto, P Adamo, F Loffredo, F De Cicco, V Roca
It has been widely shown that nuclear fallout includes substances, which accumulate in organisms such as crustaceans, fish, mushrooms and lichens, helping to evaluate the activity concentration of contaminants accumulated on a long time. In this context, radiocaesium deposited in soil following the Chernobyl accident on 26 April 1986 is known to have remained persistently available for plant uptake in many areas of Europe. Studies on the lichen Stereocaulon vesuvianum show the plant's high capacity to retain radionuclides from the substrate and the air...
April 5, 2017: Journal of Environmental Radioactivity
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