keyword
https://read.qxmd.com/read/38528708/strong-prevalence-of-light-regime-specific-qtl-in-arabidopsis-detected-using-automated-high-throughput-phenotyping-in-fluctuating-or-constant-light
#1
JOURNAL ARTICLE
Marc C Heuermann, Rhonda C Meyer, Dominic Knoch, Henning Tschiersch, Thomas Altmann
Plants have evolved and adapted under dynamic environmental conditions, particularly to fluctuating light, but plant research has often focused on constant growth conditions. To quantitatively asses the adaptation to fluctuating light, a panel of 384 natural Arabidopsis thaliana accessions was analyzed in two parallel independent experiments under fluctuating and constant light conditions in an automated high-throughput phenotyping system upgraded with supplemental LEDs. While the integrated daily photosynthetically active radiation was the same under both light regimes, plants in fluctuating light conditions accumulated significantly less biomass and had lower leaf area during their measured vegetative growth than plants in constant light...
2024: Physiologia Plantarum
https://read.qxmd.com/read/38520340/comparative-transcriptomics-illuminates-the-cellular-responses-of-an-aeroterrestrial-zygnematophyte-to-uv-radiation
#2
JOURNAL ARTICLE
Anna Busch, Jennifer V Gerbracht, Kevin Davies, Ute Hoecker, Sebastian Hess
The zygnematophytes are the closest relatives of land plants and comprise several lineages that adapted to a life on land. Species of the genus Serritaenia form colorful, mucilaginous capsules, which surround the cells and block harmful solar radiation, one of the major terrestrial stressors. In eukaryotic algae, this "sunscreen mucilage" represents a unique photoprotective strategy, whose induction and chemical background are unknown. We generated a de novo transcriptome of Serritaenia testaceovaginata and studied its gene regulation under moderate ultraviolet radiation (UVR) that triggers sunscreen mucilage under experimental conditions...
March 23, 2024: Journal of Experimental Botany
https://read.qxmd.com/read/38515227/chloroplast-ion-homeostasis-what-do-we-know-and-where-should-we-go
#3
REVIEW
Hans-Henning Kunz, Ute Armbruster, Susanne Mühlbauer, Jan de Vries, Geoffry A Davis
Plant yields heavily depend on proper macro- and micronutrient supply from the soil. In the leaf cells, nutrient ions fulfill specific roles in biochemical reactions, especially photosynthesis housed in the chloroplast. Here, a well-balanced ion homeostasis is maintained by a number of ion transport proteins embedded in the envelope and thylakoid membranes. Ten years ago, the first alkali metal transporters from the K+ EFFLUX ANTIPORTER family were discovered in the model plant Arabidopsis. Since then, our knowledge about the physiological importance of these carriers and their substrates has greatly expanded...
March 21, 2024: New Phytologist
https://read.qxmd.com/read/38460844/effects-of-znwo-4-nanoparticles-on-growth-photosynthesis-and-biochemical-parameters-of-the-green-microalga-raphidocelis-subcapitata
#4
JOURNAL ARTICLE
Renan Castelhano Gebara, Cínthia Bruno de Abreu, Giseli Swerts Rocha, Adrislaine da Silva Mansano, Marcelo Assis, Ailton José Moreira, Mykaelli Andrade Santos, Thalles Maranesi Pereira, Luciano Sindra Virtuoso, Maria da Graça Gama Melão, Elson Longo
Nanoparticles have applications in many sectors in the society. ZnWO4 nanoparticles (ZnWO4 -NPs) have potential in the fabrication of sensors, lasers, and batteries, and in environmental remediation. Thus, these NPs may reach aquatic ecosystems. However, we still do not know their effects on aquatic biota and, to our knowledge, this is the first study that evaluates the toxicity of ZnWO4 -NPs in a eukaryotic organism. We evaluated the toxicity of ZnWO4 -NPs on the green microalga Raphidocelis subcapitata for 96 h, in terms of growth, cell parameters, photosynthesis, and biochemical analysis...
March 7, 2024: Chemosphere
https://read.qxmd.com/read/38459721/the-rev-erb-antagonist-sr8278-modulates-keratinocyte-viability-in-response-to-uva-and-uvb-radiation
#5
JOURNAL ARTICLE
William Cvammen, Michael G Kemp
The nucleotide excision repair (NER) system removes UV photoproducts from genomic DNA and is controlled by the circadian clock. Given that small-molecule compounds have been developed to target various clock proteins, we examined whether the cryptochrome inhibitor KS15 and REV-ERB antagonist SR8278 could modulate keratinocyte responses to UV radiation in vitro. We observed that though SR8278 promoted cell viability in UVB-irradiated cells, it had little effect on NER or on the expression of the clock-regulated NER factor XPA...
March 8, 2024: Photochemistry and Photobiology
https://read.qxmd.com/read/38451302/efficacy-of-lifestyle-interventions-in-the-management-of-systemic-lupus-erythematosus-a-systematic-review-of-the-literature
#6
Alexander Tsoi, Alvaro Gomez, Carina Boström, Denise Pezzella, Jun Weng Chow, Charlotte Girard-Guyonvarc'h, Tanja Stamm, Laurent Arnaud, Ioannis Parodis
We performed a systematic review to explore existing evidence regarding the efficacy of lifestyle interventions for the management of systemic lupus erythematosus (SLE). The search was conducted on the 22nd of June 2021 for publications between 1st of January 2000 and the date of search. Additional articles within the aforementioned timeframe and until December 2023 were added by hand searching. Databases utilized were Medline, Embase, Web of Science, and Cinahl. Lifestyle interventions were defined as any intervention encompassing one or more of the following: physical exercise, diet and nutrition, mental health, harmful exposures, sleep, and social relations...
March 7, 2024: Rheumatology International
https://read.qxmd.com/read/38393038/lipidome-plasticity-enables-unusual-photosynthetic-flexibility-in-arctic-vs-temperate-diatoms
#7
JOURNAL ARTICLE
Jon Brage Svenning, Terje Vasskog, Karley Campbell, Agnethe Hansen Bæverud, Torbjørn Norberg Myhre, Lars Dalheim, Zoé Lulu Forgereau, Janina Emilia Osanen, Espen Holst Hansen, Hans C Bernstein
The diatom lipidome actively regulates photosynthesis and displays a high degree of plasticity in response to a light environment, either directly as structural modifications of thylakoid membranes and protein-pigment complexes, or indirectly via photoprotection mechanisms that dissipate excess light energy. This acclimation is crucial to maintaining primary production in marine systems, particularly in polar environments, due to the large temporal variations in both the intensity and wavelength distributions of downwelling solar irradiance...
January 27, 2024: Marine Drugs
https://read.qxmd.com/read/38359060/polyphenolic-platform-ameliorated-sanshool-for-skin-photoprotection
#8
JOURNAL ARTICLE
Tianyou Wang, Linghong Guo, Shuwei Wu, Yuanyuan Xu, Junmei Song, Yi Yang, Hengjie Zhang, Dongcui Li, Yiwen Li, Xian Jiang, Zhipeng Gu
Natural evolution has nurtured a series of active molecules that play vital roles in physiological systems, but their further applications have been severely limited by rapid deactivation, short cycle time, and potential toxicity after isolation. For instance, the instability of structures and properties has greatly descended when sanshool is derived from Zanthoxylum xanthoxylum. Herein, natural polyphenols are employed to boost the key properties of sanshool by fabricating a series of nanoparticles (NPs). The intracellular evaluation and in vivo animal model are conducted to demonstrate the decreased photodamage score and skin-fold thickness of prepared NPs, which can be attributed to the better biocompatibility, improved free radical scavenging, down-regulated apoptosis ratios, and reduced DNA double-strand breaks compared to naked sanshool...
February 15, 2024: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://read.qxmd.com/read/38354924/water-in-water-emulsion-stabilized-by-liposomes-developed-from-whey-protein-isolate-and-xanthan-gum-environmental-stability-and-photoprotection-effect-for-riboflavin
#9
JOURNAL ARTICLE
Chuanfen Pu, Yongxue Luo, Yue Sun, Jie Zhang, Hanwen Cui, Man Li, Qingjie Sun, Wenting Tang
The purpose of this work is to explore the feasibility of water in water (W/W) emulsion stabilized with liposomes as a water-soluble nutraceutical carrier. A W/W emulsion system composed of xanthan gum (XG) and whey protein isolate (WPI) with different amount (0.2 %, 0.4 %, and 0.6 %) of liposomes as stabilizer was constructed. Fast green staining observation showed that XG was the internal phase and WPI was the continuous phase respectively. Confocal laser scanning microscopy revealed that with the increase of liposomes concentration from 0...
February 12, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38347057/the-relationship-between-the-level-of-vitamin-d-and-ruptured-intracranial-aneurysms-among-patients-with-high-sun-exposure
#10
JOURNAL ARTICLE
Lívio Pereira de Macêdo, Renata de Castro Tavares, Mateus Torres Braga, Lidiane Moura Dos Santos, Glaudir Donato, Fábio Antônio Serra de Lima Júnior, Rosanne Pereira de Macêdo, Arlindo Ugulino Netto, Kauê Franke, Pierre Vansant Oliveira Eugênio, Auricélio Batista Cezar-Junior, Igor Vilela Faquini, José Laércio Júnior Silva, Eduardo Vieira de Carvalho Júnior, Nivaldo S Almeida, Francisco Alfredo Bandeira E Farias, Marcelo Moraes Valença, Hildo Rocha Cirne Azevedo-Filho
Non-traumatic subarachnoid hemorrhage (SAH) accounts for 3-5% of acute strokes. Intracranial aneurysm is the most common cause of non-traumatic SAH. Vitamin D influences the cardiovascular system, including the formation and rupture of cerebral aneurysms. To evaluate the serum vitamin D level in patients living in the tropical zone who suffered aneurysmal subarachnoid hemorrhage and its correlation with demographic and neurological characteristics. This is an analytical cross-sectional study to assess the serum level of vitamin D in a study population of 99 patients treated and diagnosed with aSAH in a public hospital in Recife-PE over a period of 12 months...
February 12, 2024: Scientific Reports
https://read.qxmd.com/read/38346562/photoprotective-mechanisms-and-higher-photorespiration-are-key-points-for-iron-stress-tolerance-under-heatwaves-in-rice
#11
JOURNAL ARTICLE
Moises Alves de Souza, Lissa Izabel Ferreira de Andrade, Jorge Gago, Eduardo Gusmão Pereira
Considering the current climate change scenario, the development of heat-tolerant rice cultivars (Oryza sativa L.) is paramount for cultivation in waterlogged systems affected by iron (Fe) excess. The objective of this work was to investigate the physiological basis of tolerance to excess Fe in rice cultivars that would maintain photosynthetic efficiency at higher temperatures. In an experimental approach, two rice cultivars (IRGA424 - tolerant and IRGA417- susceptible to Fe toxicity) were exposed to two concentrations of FeSO4 -EDTA, control (0...
February 10, 2024: Plant Science: An International Journal of Experimental Plant Biology
https://read.qxmd.com/read/38312314/interaction-between-the-microbiota-and-the-skin-barrier-in-aging-skin-a-comprehensive-review
#12
REVIEW
Yu Ri Woo, Hei Sung Kim
The interplay between the microbes and the skin barrier holds pivotal significance in skin health and aging. The skin and gut, both of which are critical immune and neuroendocrine system, harbor microbes that are kept in balance. Microbial shifts are seen with aging and may accelerate age-related skin changes. This comprehensive review investigates the intricate connection between microbe dynamics, skin barrier, and the aging process. The gut microbe plays essential roles in the human body, safeguarding the host, modulating metabolism, and shaping immunity...
2024: Frontiers in Physiology
https://read.qxmd.com/read/38265448/tofacitinib-a-treatment-option-for-recalcitrant-polymorphic-light-eruption-and-its-mechanistic-rationale
#13
JOURNAL ARTICLE
Kabir Sardana, Sinu Rose Mathachan, Ananta Khurana
<u>Background:</u> Polymorphous light eruption is largely characterized by a delayed-type (type IV) hypersensitivity reaction to 1 or more undefined endogenous ultraviolet-induced skin antigens. <u>Objectives:</u> To evaluate the efficacy of tofacitinib in refractory cases of polymorphous light eruption. <u>Methods:</u> Seven patients who had failed multiple systemic treatments or relapsed within 2 weeks of existing systemic agents with concomitant photoprotection were offered tofacitinib after written consent...
January 23, 2024: Dermatitis
https://read.qxmd.com/read/38257148/differential-regulation-of-circadian-clock-genes-by-uv-b-radiation-and-1-25-dihydroxyvitamin-d-a-pilot-study-during-different-stages-of-skin-photocarcinogenesis
#14
JOURNAL ARTICLE
Leandros Lamnis, Christoforos Christofi, Alexandra Stark, Heike Palm, Klaus Roemer, Thomas Vogt, Jörg Reichrath
BACKGROUND: Increasing evidence points at an important physiological role of the timekeeping system, known as the circadian clock (CC), regulating not only our sleep-awake rhythm but additionally many other cellular processes in peripheral tissues. It was shown in various cell types that environmental stressors, including ultraviolet B radiation (UV-B), modulate the expression of genes that regulate the CC (CCGs) and that these CCGs modulate susceptibility for UV-B-induced cellular damage...
January 14, 2024: Nutrients
https://read.qxmd.com/read/38243219/computational-dissection-of-genetic-variation-modulating-the-response-of-multiple-photosynthetic-phenotypes-to-the-light-environment
#15
JOURNAL ARTICLE
Huiying Gong, Ziyang Zhou, Chenhao Bu, Deqiang Zhang, Qing Fang, Xiao-Yu Zhang, Yuepeng Song
BACKGROUND: The expression of biological traits is modulated by genetics as well as the environment, and the level of influence exerted by the latter may vary across characteristics. Photosynthetic traits in plants are complex quantitative traits that are regulated by both endogenous genetic factors and external environmental factors such as light intensity and CO2 concentration. The specific processes impacted occur dynamically and continuously as the growth of plants changes. Although studies have been conducted to explore the genetic regulatory mechanisms of individual photosynthetic traits or to evaluate the effects of certain environmental variables on photosynthetic traits, the systematic impact of environmental variables on the dynamic process of integrated plant growth and development has not been fully elucidated...
January 20, 2024: BMC Genomics
https://read.qxmd.com/read/38217537/physiological-adaptation-to-irradiance-in-duckweeds-is-species-and-accession-specific-and-depends-on-light-habitat-niche
#16
JOURNAL ARTICLE
Kellie E Smith, Laura Cowan, Beth Taylor, Lorna McAusland, Matthew Heatley, Levi Yant, Erik H Murchie
Duckweeds span 36 species of free-floating aquatic organisms with body sizes ranging from 2 mm to 10 mm, where each plant body plan is reduced to a largely leaf-like structure. As an emerging crop, their fast growth rates offer potential for cultivation in closed systems. We describe a novel UK collection derived from low light (dLL) or high light (dHL) habitats, profiled for growth, photosynthesis, and photoprotection (non-photochemical quenching, NPQ) responses. Twenty-three accessions of three Lemna species and one Spirodela polyrhiza were grown under relatively low light (LL: 100 μmol m-2 s-1) and high light (HL: 350 μmol m-2 s-1) intensities...
January 13, 2024: Journal of Experimental Botany
https://read.qxmd.com/read/38166607/hydroxychloroquine-as-an-important-immunomodulator-a-novel-insight-into-an-old-drug
#17
JOURNAL ARTICLE
Katarzyna Pawlak-Buś, Piotr Leszczyński
Hydroxychloroquine (HCQ) is an increasingly popular drug owing to its efficacy, long-term safety, and a wide range of therapeutic effects. Currently, the use of the drug goes beyond the treatment of rheumatic and dermatological diseases due to the numerous benefits it provides. As HCQ shows anti-inflammatory, immunomodulatory, antiproliferative, and photoprotective action, it has a great potential to be applied also in the treatment of oncological diseases, multiple sclerosis, diabetes, cardiovascular diseases, or recurrent miscarriages...
January 2, 2024: Polish Archives of Internal Medicine
https://read.qxmd.com/read/38132954/biotechnological-potential-of-macroalgae-during-seasonal-blooms-for-sustainable-production-of-uv-absorbing-compounds
#18
REVIEW
Nedeljka Rosic, Carol Thornber
Marine macroalgae (seaweeds) are important primary global producers, with a wide distribution in oceans around the world from polar to tropical regions. Most of these species are exposed to variable environmental conditions, such as abiotic (e.g., light irradiance, temperature variations, nutrient availability, salinity levels) and biotic factors (e.g., grazing and pathogen exposure). As a result, macroalgae developed numerous important strategies to increase their adaptability, including synthesizing secondary metabolites, which have promising biotechnological applications, such as UV-absorbing Mycosporine-Like Amino Acid (MAAs)...
December 8, 2023: Marine Drugs
https://read.qxmd.com/read/38068591/-sloanea-chocoana-and-s-pittieriana-elaeocarpaceae-chemical-and-biological-studies-of-ethanolic-extracts-and-skincare-properties
#19
JOURNAL ARTICLE
Patricia Quintero-Rincón, Nayive Pino-Benítez, Elkin Galeano, Cris Rojo-Uribe, Ana C Mesa-Arango, Oscar A Flórez-Acosta
The Colombian Chocó is known for its rich biodiversity and to harbor plant species that are under-explored, including the genus Sloanea . This study aimed to analyze the chemical composition of derivatized ethanolic extracts from S. chocoana and S. pittieriana using BSTFA and TMCS through GC-MS, and to assess cell viability of immortalized human non-tumorigenic keratinocytes (HaCaT) and periodontal ligament fibroblast cells using crude extracts through MTS assay. Antioxidant and photoprotective properties were determined using DPPH assay and spectrophotometry...
November 24, 2023: Plants (Basel, Switzerland)
https://read.qxmd.com/read/38055069/exploring-the-potential-of-moringa-oleifera-lam-in-skin-disorders-and-cosmetics-nutritional-analysis-phytochemistry-geographical-distribution-ethnomedicinal-uses-dermatological-studies-and-cosmetic-formulations
#20
REVIEW
Prakrati Garg, Swati Pundir, Aaliya Ali, Sebika Panja, Dinesh Kumar Chellappan, Kamal Dua, Saurabh Kulshrestha, Poonam Negi
Moringa oleifera Lam. is a pan-tropical plant well known to the ancient world for its extensive therapeutic benefits in the Ayurvedic and Unani medical systems. The ancient world was familiar with this tree, but it has only lately been rediscovered as a multifunctional species with a huge range of possible therapeutic applications. It is a folk remedy for skin diseases, edema, sore gums, etc. This review comprises the history, ethnomedicinal applications, botanical characteristics, geographic distribution, propagation, nutritional and phytochemical profile, dermatological effects, and commercially available cosmeceuticals of Moringa oleifera Lam...
December 6, 2023: Naunyn-Schmiedeberg's Archives of Pharmacology
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