- The multi-purpose role of hairiness in the lichens of coastal environments: Insights from Seirophora villosa (Ach.) Frödén. [Journal Article]
- PPPlant Physiol Biochem 2019 Jun 16; 141:398-406
- The fruticose epiphytic lichen Seirophora villosa, strictly associated with Juniperus shrublands in the Mediterranean basin, was used to investigate the role of hairiness on a lichen thallus, as a ch…
The fruticose epiphytic lichen Seirophora villosa, strictly associated with Juniperus shrublands in the Mediterranean basin, was used to investigate the role of hairiness on a lichen thallus, as a characteristic morphological trait. We evaluated the effect of hair removal on the physiological parameters of a set of samples, during desiccation and on exposure to different salt concentrations. Hairy thalli were less affected by salt, suggesting that during dehydration, the presence of hair protects the thallus from light irradiance, oxidative stresses and the lipid peroxidation generated by free radicals, and could offer passive, but selective, water control. Our results showed that hair could not only increase thallus surface and promote water absorption when availability is low, but could also repel the salt dissolved in water by activating a passive resistance mechanism, by preventing salt entering.
- The many faces of penile lichen planus. [Journal Article]
- IJInt J Dermatol 2019 Jun 22
- Lichenoid reaction with granulomatous stomatitis: a retrospective histologic study of 47 patients. [Journal Article]
- JOJ Oral Pathol Med 2019 Jun 22
- CONCLUSIONS: Lichenoid granulomatous disease may be more common than previously reported; however, its etiology remains unknown and patients should be kept under long term clinical follow up. This article is protected by copyright. All rights reserved.
- Alterations in the expression of EMT-related proteins claudin-1, -4 and -7, E-cadherin, TWIST1 and ZEB1 in oral lichen planus. [Journal Article]
- JOJ Oral Pathol Med 2019 Jun 22
- CONCLUSIONS: The data indicates that the expression of claudin-1, -4 and E-cadherin is decreased in oral lichen planus. This may lead to disturbance in epithelial tight junctions, cell-cell connections and epithelial permeability, contributing to oral lichen planus pathogenesis. Based on the present study, the role of TWIST1 and ZEB1 in oral lichen planus remains unclear. This article is protected by copyright. All rights reserved.
- Extracts of Flavoparmelia sp. Inhibit Receptor Activator of Nuclear Factor-κB Ligand-Mediated Osteoclast Differentiation. [Journal Article]
- JBJ Bone Metab 2019; 26(2):113-121
- CONCLUSIONS: Taken together, our results show that EFV is a promising candidate for health functional foods or therapeutic agents that can help treat bone diseases such as osteoporosis.
- Potential survival of the lichen Caloplaca flavovirescens under high helium-beam doses. [Journal Article]
- RERadiat Environ Biophys 2019 Jun 20
- Testing the limits of survivability in space is the primary focus in astrobiological research. Although a number of previous studies have examined terrestrial life survival in an extraterrestrial env…
Testing the limits of survivability in space is the primary focus in astrobiological research. Although a number of previous studies have examined terrestrial life survival in an extraterrestrial environment, only a few have investigated how life systems respond to high doses of alpha cosmic ray, the main component of cosmic rays. We used respiration and photosynthetic rates as indicators of the vital signs of the lichen Caloplaca flavovirescens, which is a symbiotic life form including fungi and algae. Our experiment demonstrated that the photosynthetic rate decreased with increased helium-beam doses, whereas the respiration rate was relatively unaffected. Specifically, under a helium-beam dose greater than 10 Gy, the respiration rate remained nearly constant regardless of further increases in the radiation rate. Our results indicate that the different metabolic systems of terrestrial life forms might exhibit different survival characteristics when they are in space.
- Multiple historical processes obscure phylogenetic relationships in a taxonomically difficult group (Lobariaceae, Ascomycota). [Journal Article]
- SRSci Rep 2019 Jun 20; 9(1):8968
- In the age of next-generation sequencing, the number of loci available for phylogenetic analyses has increased by orders of magnitude. But despite this dramatic increase in the amount of data, some p…
In the age of next-generation sequencing, the number of loci available for phylogenetic analyses has increased by orders of magnitude. But despite this dramatic increase in the amount of data, some phylogenomic studies have revealed rampant gene-tree discordance that can be caused by many historical processes, such as rapid diversification, gene duplication, or reticulate evolution. We used a target enrichment approach to sample 400 single-copy nuclear genes and estimate the phylogenetic relationships of 13 genera in the lichen-forming family Lobariaceae to address the effect of data type (nucleotides and amino acids) and phylogenetic reconstruction method (concatenation and species tree approaches). Furthermore, we examined datasets for evidence of historical processes, such as rapid diversification and reticulate evolution. We found incongruence associated with sequence data types (nucleotide vs. amino acid sequences) and with different methods of phylogenetic reconstruction (species tree vs. concatenation). The resulting phylogenetic trees provided evidence for rapid and reticulate evolution based on extremely short branches in the backbone of the phylogenies. The observed rapid and reticulate diversifications may explain conflicts among gene trees and the challenges to resolving evolutionary relationships. Based on divergence times, the diversification at the backbone occurred near the Cretaceous-Paleogene (K-Pg) boundary (65 Mya) which is consistent with other rapid diversifications in the tree of life. Although some phylogenetic relationships within the Lobariaceae family remain with low support, even with our powerful phylogenomic dataset of up to 376 genes, our use of target-capturing data allowed for the novel exploration of the mechanisms underlying phylogenetic and systematic incongruence.
- Correlation of clinicopathological characteristics and direct immunofluorescence studies in oral lichenoid lesion in Thai patients. [Journal Article]
- JIJ Investig Clin Dent 2019 Jun 20; :e12433
- CONCLUSIONS: An OLP-like lesion could be diagnosed as OLP, OLP/LE, chronic ulcerative-like lesion, immune-mediated disease or dysplasia.
- Immunohistochemical evaluation of the effect of acitretin and systemic steroid treatments on Ki-67, Bcl-2, and COX-2 levels in cutaneous lichen planus patients. [Journal Article]
- IJInt J Dermatol 2019 Jun 19
- CONCLUSIONS: With this study in cutaneous lichen planus, prednisolone and acitretin treatments reduced Bcl-2 and Ki-67 levels and did not effect COX-2 levels. It should be clarified whether these results can be obtained with any treatment effective in cutaneous lichen planus.
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- Lichen Parmelia sulcatamediated synthesis of gold nanoparticles: an eco-friendly tool against Anopheles stephensi and Aedes aegypti. [Journal Article]
- ESEnviron Sci Pollut Res Int 2019 Jun 19
- The gold nanoparticles (AuNPs) were synthesized using the lichen Parmelia sulcata extract (PSE) and characterized. The peaks of ultraviolet spectrophotometer and Fourier transmission infrared confirm…
The gold nanoparticles (AuNPs) were synthesized using the lichen Parmelia sulcata extract (PSE) and characterized. The peaks of ultraviolet spectrophotometer and Fourier transmission infrared confirmed the formation of nanoparticles and the bioactive compounds of the lichen being responsible for reducing and capping of the particles. The face-centered cubic particles were determined by XRD peaks at 111, 200, 220, and 311. The elemental composition and spherical shape of AuNPs were confirmed by energy-dispersive spectroscopy and transmission electron microscopy. The average particle size is 54 nm, and the zeta potential - 18 was ascertained by dynamic light scattering. The potential effect of synthesized nanoparticles and lichen extracts was evaluated for antioxidant bioassays like DPPH and H2O2 and tested for mosquitocidal activity against Anopheles stephensi. Results showed that the lichen extract and AuNPs have the capability to scavenge the free radicals with the IC50 values of DPPH being 1020 and 815 μg/ml and the IC50 values of H2O2 being 694 and 510 μg/ml, respectively. The mosquitocidal experimental results in this study showed the inhibition of A. stephensi and A. aegypti against the larvae (I-IV instar), pupae, adult, and egg hatching. On comparison, A. stephensi showed effective inhibition than A. aegypti even at low concentration. Based on the obtained results, gold nanoparticles synthesized using PSE showed an excellent mosquitocidal effect against Anopheles stephensi.