Inhibition of cytochrome P450s enhances (+)-usnic acid cytotoxicity in primary cultured rat hepatocytes.

Journal of applied toxicology : JAT 20140801

Harmful effects of usnic acid on hepatic metabolism.

Chemico-biological interactions 20130425

Membrane-damaging potential of natural L-(-)-usnic acid in Staphylococcus aureus.

European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology 20121201

Anti-viral activity of (-)- and (+)-usnic acids and their derivatives against influenza virus A(H1N1)2009.

Bioorganic & medicinal chemistry letters 20121201

Chemical composition of three Parmelia lichens and antioxidant, antimicrobial and cytotoxic activities of some their major metabolites.

Phytomedicine : international journal of phytotherapy and phytopharmacology 20121015

Effects of usnic acid exposure on human hepatoblastoma HepG2 cells in culture.

Journal of applied toxicology : JAT 20120901

Usnic acid inhibits breast tumor angiogenesis and growth by suppressing VEGFR2-mediated AKT and ERK1/2 signaling pathways.

Angiogenesis 20120901

Influence of usnic acid and its derivatives on the activity of mammalian poly(ADP-ribose)polymerase 1 and DNA polymerase β.

Medicinal chemistry (Shariqah (United Arab Emirates)) 20120901

Interactive toxicity of usnic acid and lipopolysaccharides in human liver HepG2 cells.

Journal of applied toxicology : JAT 20120901

Antioxidative and cardiovascular-protective activities of metabolite usnic acid and psoromic acid produced by lichen species Usnea complanata under submerged fermentation.

Pharmaceutical biology 20120801

Proteomic study on usnic-acid-induced hepatotoxicity in rats.

Journal of agricultural and food chemistry 20120725

Lichen secondary metabolites are responsible for induction of apoptosis in HT-29 and A2780 human cancer cell lines.

Toxicology in vitro : an international journal published in association with BIBRA 20120401

Redox characterization of usnic acid and its cytotoxic effect on human neuron-like cells (SH-SY5Y).

Toxicology in vitro : an international journal published in association with BIBRA 20120301

Studies on nutritional requirement for the culture of lichen Ramalina nervulosa and Ramalina pacifica to enhance the production of antioxidant metabolites.

Folia microbiologica 20120301

In vitro interaction of usnic acid in combination with antimicrobial agents against methicillin-resistant Staphylococcus aureus clinical isolates determined by FICI and ΔE model methods.

Phytomedicine : international journal of phytotherapy and phytopharmacology 20120215

Evaluation of portable Raman spectrometer with 1064 nm excitation for geological and forensic applications.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy 20120201

Characterisation of phenols and antioxidant and hypolipidaemic activities of Lethariella cladonioides.

Journal of the science of food and agriculture 20120130

Larvicidal activity of some secondary lichen metabolites against the mosquito Culiseta longiareolata Macquart (Diptera: Culicidae).

Natural product research 20120101

Chemical Composition, Antioxidant, and Antimicrobial Activities of Lichen Umbilicaria cylindrica (L.) Delise (Umbilicariaceae).

Evidence-based complementary and alternative medicine : eCAM 20120101

New formulations of local anaesthetics-part I.

Anesthesiology research and practice 20120101

A forgotten collection: the Libyan ethnobotanical exhibits (1912-14) by A. Trotter at the Museum O. Comes at the University Federico II in Naples, Italy.

Journal of ethnobiology and ethnomedicine 20120101

Tannins, peptic ulcers and related mechanisms.

International journal of molecular sciences 20120101

An overview of the evidence and mechanisms of herb-drug interactions.

Frontiers in pharmacology 20120101

Intraerythrocytic stages of Plasmodium falciparum biosynthesize vitamin E.

FEBS letters 20111215

Mechanical effects, antimicrobial efficacy and cytotoxicity of usnic acid as a biofilm prophylaxis in PMMA.

Journal of materials science. Materials in medicine 20111201

A new depsidone and antibacterial activities of compounds from Usnea undulata Stirton.

Journal of Asian natural products research 20111201

Inhibitory activity of Fe(3) O(4)/oleic acid/usnic acid-core/shell/extra-shell nanofluid on S. aureus biofilm development.

IEEE transactions on nanobioscience 20111201

The anti-obesity effect of Lethariella cladonioides in 3T3-L1 cells and obese mice.

Nutrition research and practice 20111201

Assessment of usnic acid toxicity in rat primary hepatocytes using ¹³C isotopomer distribution analysis of lactate, glutamate and glucose.

Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association 20111101

A metabonomic characterization of (+)-usnic acid-induced liver injury by gas chromatography-mass spectrometry-based metabolic profiling of the plasma and liver in rat.

International journal of toxicology 20111001

Sensitivity of Xanthoria parietina to UV-A: role of metabolic modulators.

Journal of photochemistry and photobiology. B, Biology 20110602

Review of liver injury associated with dietary supplements.

Liver international : official journal of the International Association for the Study of the Liver 20110501

Acute liver failure caused by 'fat burners' and dietary supplements: a case report and literature review.

Canadian journal of gastroenterology = Journal canadien de gastroenterologie 20110301

Variable responses of different human cancer cells to the lichen compounds parietin, atranorin, usnic acid and gyrophoric acid.

Toxicology in vitro : an international journal published in association with BIBRA 20110201

Production of anti-Helicobacter pylori metabolite by the lichen-forming fungus Nephromopsis pallescens.

Journal of microbiology (Seoul, Korea) 20110201

Molecular clips and tweezers hosting neutral guests.

Chemical Society reviews 20110101

Collagen-based films containing liposome-loaded usnic acid as dressing for dermal burn healing.

Journal of biomedicine & biotechnology 20110101

Human serum-derived hydroxy long-chain fatty acids exhibit anti-inflammatory and anti-proliferative activity.

Journal of experimental & clinical cancer research : CR 20110101

Degradation of the disease-associated prion protein by a serine protease from lichens.

PloS one 20110101

Antioxidant, antimicrobial and antiproliferative activities of five lichen species.

International journal of molecular sciences 20110101

Antioxidant, antimicrobial and anticancer activity of the lichens Cladonia furcata, Lecanora atra and Lecanora muralis.

BMC complementary and alternative medicine 20110101

Airborne contact dermatitis - current perspectives in etiopathogenesis and management.

Indian journal of dermatology 20110101

In situ imaging of usnic acid in selected Cladonia spp. by vibrational spectroscopy.

The Analyst 20101201

HPLC isolation of antioxidant constituents from Xanthoparmelia spp.

Journal of pharmaceutical and biomedical analysis 20101010

Prooxidant and antioxidant behaviour of usnic acid from lichens under UVB-light irradiation--studies on human cells.

Journal of photochemistry and photobiology. B, Biology 20101005

Does usnic acid affect microtubules in human cancer cells?

Brazilian journal of biology = Revista brasleira de biologia 20100801

Cellular mechanisms of the anticancer effects of the lichen compound usnic acid.

Planta medica 20100701

Pharmacological properties of lichen Cladonia clathrata.

Pharmaceutical biology 20100701

Antimycobacterial activity of lichen substances.

Phytomedicine : international journal of phytotherapy and phytopharmacology 20100401

Human dermal fibroblast proliferation activity of usimine-C from Antarctic lichen Ramalina terebrata.

Biotechnology letters 20100401

Comparison of the phytotoxic effects of usnic acid on cultures of free-living alga Scenedesmus quadricauda and aposymbiotically grown lichen photobiont Trebouxia erici.

Journal of chemical ecology 20100401

Microbial degradation of usnic acid in the reindeer rumen.

Die Naturwissenschaften 20100301

Antimycobacterial activity of usnic acid against resistant and susceptible strains of Mycobacterium tuberculosis and non-tuberculous mycobacteria.

Pharmaceutical biology 20100301

Anti-mutagenic lichen extract has double-edged effect on azoxymethane-induced colorectal oncogenesis in C57BL/6J mice.

Toxicology mechanisms and methods 20100101

Antibacterial activities of Ramalin, usnic acid and its three derivatives isolated from the Antarctic lichen Ramalina terebrata.

Zeitschrift fur Naturforschung. C, Journal of biosciences 20100101

Current results on biological activities of lichen secondary metabolites: a review.

Zeitschrift fur Naturforschung. C, Journal of biosciences 20100101

Anti-photoaging and photoprotective compounds derived from marine organisms.

Marine drugs 20100101

Analysis of salazinic, norstictic, and usnic acids in Xanthoparmelia chlorochroa by ultra-performance liquid chromatography/tandem mass spectrometry.

Journal of AOAC International 20100101

Molecular structural studies of lichen substances with antimicrobial, antiproliferative, and cytotoxic effects from Parmelia subrudecta.

Preparative biochemistry & biotechnology 20100101

Traditional herbal medicine in far-west Nepal: a pharmacological appraisal.

Journal of ethnobiology and ethnomedicine 20100101

Determination of Teloschistes flavicans (sw) norm anti-inflammatory activity.

Pharmacognosy research 20100101

Protoplast isolation from cultured lichen Usnea ghattensis, their fusion with protoplasts of Aspergillus nidulans, fusant regeneration and production of usnic acid.

Folia microbiologica 20090901

Raman spectroscopic identification of usnic acid in hydrothermal minerals as a potential Martian analogue.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy 20090801

[Oral acute toxicity of (+)-usnic acid in mice and its cytotoxicity in rat cardiac fibroblasts].

Nan fang yi ke da xue xue bao = Journal of Southern Medical University 20090801

In vitro anti-Helicobacter pylori activity of usnic acid.

Phytotherapy research : PTR 20090701

Phytochemical investigation of the Australian lichens Ramalina glaucescens and Xanthoria parietina.

Natural product communications 20090701

Antiproliferative effects on tumour cells and promotion of keratinocyte wound healing by different lichen compounds.

Planta medica 20090501

The chemoenzymatic synthesis of usnic acid.

Bioorganic & medicinal chemistry letters 20090501

Lichens--photophysical studies of potential new sunscreens.

Journal of photochemistry and photobiology. B, Biology 20090402

Effect of (+)-usnic acid on mitochondrial functions as measured by mitochondria-specific oligonucleotide microarray in liver of B6C3F1 mice.

Mitochondrion 20090401

Novel chiral molecular tweezer from (+)-usnic acid.

Organic letters 20090205

Dissociation and metal-binding characteristics of yellow lichen substances suggest a relationship with site preferences of lichens.

Annals of botany 20090101

Lichen substances prevent lichens from nutrient deficiency.

Journal of chemical ecology 20090101

Elucidation of the complexation mechanism between (+)-usnic acid and cyclodextrins studied by isothermal titration calorimetry and phase-solubility diagram experiments.

Journal of molecular recognition : JMR 20090101

Ancient horizontal gene transfer from bacteria enhances biosynthetic capabilities of fungi.

PloS one 20090101

Lichen extracts.

Dermatitis : contact, atopic, occupational, drug 20090101

In vitrouptake and antimycobacterial activity of liposomal usnic acid formulation.

Journal of liposome research 20090101

Resveratrol exhibits a strong cytotoxic activity in cultured cells and has an antiviral action against polyomavirus: potential clinical use.

Journal of experimental & clinical cancer research : CR 20090101

In vitro study of the inhibitory activity of usnic acid on dental plaque biofilm.

Roumanian archives of microbiology and immunology 20090101

[In vitro effect of (+)-usnic acid on Toxoplasma gondii tachyzoites].

Zhongguo ji sheng chong xue yu ji sheng chong bing za zhi = Chinese journal of parasitology & parasitic diseases 20081230

Preparation and characterization of copper(II) and nickel(II) complexes of a new chiral salen ligand derived from (+)-usnic acid.

Dalton transactions (Cambridge, England : 2003) 20081214

Down-regulatory effect of usnic acid on nuclear factor-kappaB-dependent tumor necrosis factor-alpha and inducible nitric oxide synthase expression in lipopolysaccharide-stimulated macrophages RAW 264.7.

Phytotherapy research : PTR 20081201

Lichen photobionts show tolerance against lichen acids produced by lichen mycobionts.

Bioscience, biotechnology, and biochemistry 20081201

Usnic acid controls the acidity tolerance of lichens.

Environmental pollution (Barking, Essex : 1987) 20081101

Eubacterium rangiferina, a novel usnic acid-resistant bacterium from the reindeer rumen.

Die Naturwissenschaften 20080801

Synthesis and cytotoxic activities of usnic acid derivatives.

Bioorganic & medicinal chemistry 20080715

Insecticidal activity of major lichen compounds, (-)- and (+)-usnic acid, against the larvae of house mosquito, Culex pipiens L.

Parasitology research 20080501

Usimines A-C, bioactive usnic acid derivatives from the Antarctic lichen Stereocaulon alpinum.

Journal of natural products 20080401

A new antifungal and antiprotozoal depside from the Andean lichen Protousnea poeppigii.

Phytotherapy research : PTR 20080301

Metabolism and related human risk factors for hepatic damage by usnic acid containing nutritional supplements.

Xenobiotica; the fate of foreign compounds in biological systems 20080301

Hepatotoxic slimming aids and other herbal hepatotoxins.

Journal of gastroenterology and hepatology 20080301

Mycosporine-like amino acids and marine toxins--the common and the different.

Marine drugs 20080301

Quantitative determination of secondary metabolites in Cladina stellaris and other lichens by micellar electrokinetic chromatography.

Journal of chromatography. A 20080222

Purification, identification and activity of phomodione, a furandione from an endophytic Phoma species.

Phytochemistry 20080201

Production and bioactivity of common lichen metabolites as exemplified by Heterodea muelleri (Hampe) Nyl.

Journal of chemical ecology 20080201

Cloning and sequence characterization of a non-reducing polyketide synthase gene from the lichen Xanthoparmelia semiviridis.

Mycological research 20080201

Toxicity of the lichen secondary metabolite (+)-usnic acid in domestic sheep.

Veterinary pathology 20080101

Testing for treatment effects on gene ontology.

BMC bioinformatics 20080101

Review of usnic acid and Usnea barbata toxicity.

Journal of environmental science and health. Part C, Environmental carcinogenesis & ecotoxicology reviews 20080101

Usnic acid is a promising synergist for biopreparations based on entomopathogenic microorganisms.

Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections 20080101

Usnea barbata extract prevents ultraviolet-B induced prostaglandin E2 synthesis and COX-2 expression in HaCaT keratinocytes.

Journal of photochemistry and photobiology. B, Biology 20071112

Screening of plant extracts for antimicrobial activity against bacteria and yeasts with dermatological relevance.

Phytomedicine : international journal of phytotherapy and phytopharmacology 20070801

Forest successional stage affects the cortical secondary chemistry of three old forest lichens.

Journal of chemical ecology 20070801

Potent activity of the lichen antibiotic (+)-usnic acid against clinical isolates of vancomycin-resistant enterococci and methicillin-resistant Staphylococcus aureus.

Die Naturwissenschaften 20070601

The phenolic compounds in Cladonia lichens are not antimicrobial in soils.

Oecologia 20070501

In vitro antimalarial activity of hyperforin, a prenylated acylphloroglucinol. A structure-activity study.

Bioorganic & medicinal chemistry letters 20070315

Ethnoveterinary medicines used for ruminants in British Columbia, Canada.

Journal of ethnobiology and ethnomedicine 20070101

[Investigation of the germicidal effect of usnic acid, betadine, savlosol, and desderman on the protoscolexes of lung hydatid cysts].

Turkiye parazitolojii dergisi 20070101

Lichen secondary metabolites from the cultured lichen mycobionts of Teloschistes chrysophthalmus and Ramalina celastri and their antiviral activities.

Zeitschrift fur Naturforschung. C, Journal of biosciences 20070101

In vitro cytotoxic activities of (+)-usnic acid and (-)-usnic acid on V79, A549, and human lymphocyte cells and their non-genotoxicity on human lymphocytes.

Natural product research 20061201

Nanoencapsulation of usnic acid: An attempt to improve antitumour activity and reduce hepatotoxicity.

European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V 20061001

Photosynthesis and water relations in tomato plants cultivated long-term in media containing (+)-usnic acid.

Journal of chemical ecology 20060901

Allergic contact dermatitis from a natural deodorant: a report of 4 cases associated with lichen acid mix allergy.

Journal of the American Academy of Dermatology 20060801

Indole rings in palladium(II) complexes. Dual mode of metal binding and aromatic ring stacking causing syn-anti isomerism.

Inorganic chemistry 20060724

Thermodynamic characterization of the prevailing molecular interactions in mixed floating monolayers of phospholipids and usnic acid.

Journal of colloid and interface science 20060601

Determination of usnic acid in lichen toxic to elk by liquid chromatography with ultraviolet and tandem mass spectrometry detection.

Journal of agricultural and food chemistry 20060405

Severe hepatotoxicity associated with use of a dietary supplement containing usnic acid.

Mayo Clinic proceedings 20060401

Gastroprotective and antioxidant effects of usnic acid on indomethacin-induced gastric ulcer in rats.

Journal of ethnopharmacology 20060103

Solid-phase synthesis of polyfunctionalized natural products: application to usnic acid, a bioactive lichen compound.

Journal of combinatorial chemistry 20060101

Determination of usnic acid in some Rhizoplaca species from Middle Anatolia and their antimicrobial activities.

Zeitschrift fur Naturforschung. C, Journal of biosciences 20060101

Effects of UV radiation on usnic acid in Xanthoparmelia microspora (Müll. Arg. Hale).

Photochemistry and photobiology 20060101

[Plasmid elimination effect of usnic acid on antibiotic-resistant Staphylococcus aureus].

Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 20060101

Experimental studies on the growth and usnic acid production in 'lichen'Usnea ghattensis in vitro.

Microbiological research 20060101

A study of the genetic variability of Rhizoplaca chrysoleuca using DNA sequences and secondary metabolic substances.

Mycologia 20060101

Identification and quantitation of usnic acid from the lichen Usnea species of Anatolia and antimicrobial activity.

Zeitschrift fur Naturforschung. C, Journal of biosciences 20060101

Beta-orcinol depsidones from the lichen Usnea sp. from Sri Lanka.

Natural product research 20051001

Usnic acid: a non-genotoxic compound with anti-cancer properties.

Anti-cancer drugs 20050901

Liking lichens.

The Lancet. Infectious diseases 20050901

'Fat burner' herb, usnic acid, induced acute hepatitis in a family.

Journal of gastroenterology and hepatology 20050701

[Acute hepatitis in a woman after intake of slimming pills bought via Internet].

Lakartidningen 20050701

Raman spectroscopy of hot desert, high altitude epilithic lichens.

The Analyst 20050501

Solubilization of poorly soluble lichen metabolites for biological testing on cell lines.

European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences 20050401

Seasonal trends in usnic acid concentrations of Arctic, alpine and Patagonian populations of the lichen Flavocetraria nivalis.

Phytochemistry 20050201

[The study on skin wound healing promoting action of sodium usnic acid].

Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 20050201

Effect of usnic acid from the lichen Cladonia substellata on Trypanosoma cruzi in vitro: an ultrastructural study.

Micron (Oxford, England : 1993) 20050101

Occupational allergic contact dermatitis from lichens in present-day Finland.

Contact dermatitis 20050101

Quantitative determination of usnic acid in Usnea lichen and its products by reversed-phase liquid chromatography with photodiode array detector.

Journal of AOAC International 20050101

Severe hepatotoxicity associated with the use of weight loss diet supplements containing ma huang or usnic acid.

Journal of hepatology 20041201

Cytotoxic and apoptotic effects on hepatocytes of secondary metabolites obtained from lichens.

Alternatives to laboratory animals : ATLA 20041201

Anti-proliferative lichen compounds with inhibitory activity on 12(S)-HETE production in human platelets.

Phytomedicine : international journal of phytotherapy and phytopharmacology 20041101

In vitro and in vivo properties of usnic acid encapsulated into PLGA-microspheres.

Journal of microencapsulation 20040601

Fulminant liver failure due to usnic acid for weight loss.

The American journal of gastroenterology 20040501

Hepatotoxic effect of (+)usnic acid from Usnea siamensis Wainio in rats, isolated rat hepatocytes and isolated rat liver mitochondria.

Journal of ethnopharmacology 20040201

Usnic acid-induced necrosis of cultured mouse hepatocytes: inhibition of mitochondrial function and oxidative stress.

Biochemical pharmacology 20040201

The antimicrobial activity of extracts of the lichen Cladonia foliacea and its (-)-usnic acid, atranorin, and fumarprotocetraric acid constituents.

Zeitschrift fur Naturforschung. C, Journal of biosciences 20040101

Evaluation of the antimicrobial activity of the acetone extract of the lichen Ramalina farinacea and its (+)-usnic acid, norstictic acid, and protocetraric acid constituents.

Zeitschrift fur Naturforschung. C, Journal of biosciences 20040101

Investigation by solid-phase microextraction and gas chromatography/mass spectrometry of secondary metabolites in lichens deposited on stone monuments.

Rapid communications in mass spectrometry : RCM 20030101

Impact of fertilisation on phenol content and growth rate of Cladina stellaris: a test of the carbon-nutrient balance hypothesis.

Oecologia 20030101

Usnic acid.

Phytochemistry 20021201

Alysinol--a new triterpene from Alysicarpus monolifer.

Natural product letters 20021201

Protection against UVB irradiation by natural filters extracted from lichens.

Journal of photochemistry and photobiology. B, Biology 20021101

Solubilization of the lichen metabolite (+)-usnic acid for testing in tissue culture.

The Journal of pharmacy and pharmacology 20021101

Effects of ultraviolet radiation and PAR on the content of usnic and divaricatic acids in two arctic-alpine lichens.

Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 20020901

Spectroscopic and structural characterization of copper(II) and palladium(II) complexes of a lichen substance usnic acid and its derivatives. Possible forms of environmental metals retained in lichens.

Journal of inorganic biochemistry 20020725

A review on usnic acid, an interesting natural compound.

Die Naturwissenschaften 20020401

Molecular characterization and action of usnic acid: a drug that inhibits proliferation of mouse polyomavirus in vitro and whose main target is RNA transcription.

Biochimie 20020401

Reversed-polarity capillary zone electrophoretic analysis of usnic acid.

Electrophoresis 20010801

Influences of nitrogen sources on usnic acid production in a cultured Mycobiont of the lichen Usnea hirta (L.) Wigg.

Bioscience, biotechnology, and biochemistry 20010801

Oxidative stress and usnic acid content in Parmelia caperata and Parmelia soredians (Lichenes).

Farmaco (Societa chimica italiana : 1989) 20010101

Assessment of antimycobacterial activity of a series of mainly marine derived natural products.

Planta medica 20000501

Antimycobacterial activity of lichen metabolites in vitro.

European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences 19980401