Planta Medica Journal Impact Factor & Information

Publisher: Gesellschaft für Arzneipflanzenforschung, Georg Thieme Verlag

Journal description

Current impact factor: 2.34

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 2.339
2012 Impact Factor 2.348
2011 Impact Factor 2.153
2010 Impact Factor 2.369
2009 Impact Factor 2.037
2008 Impact Factor 1.96
2007 Impact Factor 1.848
2006 Impact Factor 1.746
2005 Impact Factor 1.628
2004 Impact Factor 1.639
2003 Impact Factor 1.879
2002 Impact Factor 2.289
2001 Impact Factor 2.085
2000 Impact Factor 1.831
1999 Impact Factor 1.438
1998 Impact Factor 1.322
1997 Impact Factor 1.43
1996 Impact Factor 1.354
1995 Impact Factor 0.989
1994 Impact Factor 1.044
1993 Impact Factor 0.949
1992 Impact Factor 1.078

Impact factor over time

Impact factor

Additional details

5-year impact 2.46
Cited half-life 0.00
Immediacy index 0.30
Eigenfactor 0.01
Article influence 0.53
Other titles Planta medica (En ligne), Planta medica
ISSN 1439-0221
OCLC 182630769
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Georg Thieme Verlag

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    • Author's post-print in Institutional Repository and PubMed Central after 12 months embargo
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    • Publisher copyright and source must be acknowledged
    • Link to Publisher version ( must be included if article has been published online
    • Publisher last contacted on 31/03/2015
    • 'Georg Thieme Verlag' is an imprint of 'Thieme Publishing'
  • Classification
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Lophanthera lactescens is a medicinal plant commonly used in traditional medicine to relieve fever and pain in inflammatory processes. In the present study, the in vivo antinociceptive and anti-inflammatory effects of the methanolic extract from L. lactescens have been investigated. Antinociceptive activity was evaluated through writhing, formalin, and tail flick tests, while the anti-inflammatory activity was evaluated through paw oedema and air pouch tests in mice. A phytochemical analysis was performed. The extract produced significant inhibition on nociception induced by acetic acid-induced abdominal writhing, formalin, and tail flick tests, and on inflammation induced by oedema and air pouch tests. The previous administration of atropine and glibenclamide reduced the antinociceptive effect produced by the methanolic extract from L. lactescens on the tail flick test in 89 % and 66 %, respectively. The methanolic extract had no significant effect in the open field test. No intoxication symptoms were observed in the animals administered orally at increasing doses up to 2000 mg/kg. The methanolic extract from the stem bark of L. lactescens possesses antinociceptive properties on models of acute pain induced by chemical and thermal stimuli as well as in models of inflammation and further suggests that this anti-inflammatory activity might involve inhibition of the proinflammatory cytokines, and the antinociceptive activity might involve participation of the cholinergic system and adenosine triphosphate-dependent K+ channel. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557837
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    ABSTRACT: During hyperglycemia, the first step toward the formation of advanced glycation end products is the nonenzymatic glycation between the carbonyl group of a sugar and the primary amino group of a protein. Advanced glycation end products are then produced through more complex reactions. Reactive oxygen species derived from advanced glycation end products may play a key role in inflammation of the endothelium, leading to the complications seen in diabetes. Glycolaldehyde-induced advanced glycation end products have been reported to express proinflammatory cytokines, such as tumor necrosis factor-α and interleukin-1β. This study focused on Capsosiphon fulvescens, a Capsosiphonaceae type of green algae that has shown potential as a functional food material. Pheophorbide a, an anti-glycation compound, was isolated from C. fulvescens by extraction using a mixture of ethanol and water, followed by column fractionation of the resulting extract. The compound separated from C. fulvescens was identified by means of high-performance liquid chromatography combined with mass spectrometry. Pheophorbide a showed scavenging activity of the intracellular reactive oxygen species as well as monocyte adhesiveness inhibitory activity on the human myelomonocytic cell line (THP-1) and human umbilical vein endothelial cells cocultivation system. The mRNA levels of inflammation-related genes such as monocyte chemoattractant protein-1 and interleukin-6 were significantly decreased by pheophorbide a, and advanced glycation end products-stimulated tumor necrosis factor-α and interleukin-1β were downregulated as well. These results indicate that pheophorbide a has significant reactive oxygen species-scavenging activity, monocyte adhesive inhibitory activity, and downregulatory activity of cytokines related to inflammation affecting the endothelium. Pheophorbide a could therefore be a promising candidate for modulating endothelial cell dysfunction. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557829
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    ABSTRACT: Five new diterpenoids, lagoditerpenes A-E (1-3, 5, 6), along with ten known compounds were isolated from the herb of Lagochilus platyacanthus. The absolute structures of 1-4 and 6 were unequivocally elucidated by extensive spectroscopic analyses in association with single-crystal X-ray diffraction, in which compounds 1 and 2 were the epimers at C-13. Furthermore, in in vitro assays, compounds 1, 2 and 6 showed moderate hemostatic activities by shortening the values of activated partial thromboplastin time. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557820
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    ABSTRACT: The enzyme 4-hydroxyphenylpyruvate dioxygenase catalyzes the second step in the tyrosine degradation pathway. In mammals, this enzyme is the molecular target of drugs used for the treatment of metabolic disorders associated with defects in the tyrosine catabolism, mainly the fatal hereditary disease tyrosinemia type 1. This study evaluated the inhibitory effect of 91 extracts on 4-hydroxyphenylpyruvate dioxygenase from mostly native plants from central Argentina. Flourensia oolepis ethanol extract showed itself to be the most effective, and bioguided fractionation yielded pinocembrin (1) as its active principle. This flavanone, with an IC50 value of 73.1 µM and a KI of 13.7 µM, behaved as a reversible inhibitor of the enzyme and as a noncompetitive inhibitor. Molecular modeling studies confirmed the inhibitory potency of 1 and explained its activity by means of in silico determination of its binding mode in comparison to inhibitors of known activity, cocrystallized with 4-hydroxyphenylpyruvate dioxygenase. The main structural determinants that confer its potency are discussed. Analysis of the binding mode of the flavanone 1 with 4-hydroxyphenylpyruvate dioxygenase revealed the basis of the noncompetitive reversible mechanism of inhibition at the molecular level, which seems to be a common feature in this ubiquitous family of natural compounds. The resulting information may establish the basis for obtaining novel 4-hydroxyphenylpyruvate dioxygenase inhibitors for the treatment of tyrosinemia type 1 and other disorders associated with tyrosinase catabolism. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557864
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    ABSTRACT: The Mediterranean plant Cistus incanus is rich in polyphenols and has shown several pharmacological activities, mainly antibacterial effects. Furthermore, in situ studies revealed that a C. incanus infusion reduces the initial bacterial adhesion in the oral cavity due to the polyphenols, an indication that C. incanus might reduce the risk of caries disease. In the present study, the polyphenols from four different commercial C. incanus herbal teas were extracted by standardized accelerated solvent extraction for in vitro tests and by an infusion for in situ tests. Both extracts were characterized qualitatively and quantitatively by high-performance liquid chromatography and only the polyphenol content differed slightly. By means of diode array detection and mass spectrometry, 29 polyphenols, including ellagitannins, flavanols, and glycosylated flavonols, were identified. Thereby, only quantitative but no qualitative differences between the four samples were detected. Furthermore, the in vitro antibacterial activity of the C. incanus accelerated solvent extracts against Streptococcus mutans, one of the primary cariogenic bacterial species, was examined using a live/dead assay (BacLight®). With this approach, C. incanus yielded antibacterial properties. Additional in situ experiments indicated that rinses with a C. incanus infusion reduced the initial bacterial colonization of enamel samples exposed to oral fluids for over eight hours. Furthermore, it was shown by transmission electron microscopy that the application of a C. incanus infusion modifies the ultrastructure of the acquired enamel pellicle, yielding a more electron-dense morphology. It can be assumed that the polyphenols are responsible for the observed effects. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557822
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    ABSTRACT: It is well known that ultraviolet B irradiation leads to dermal inflammation. In this study, we found that Mekabu fucoidan suppressed edema, decreased the thickness of the prickle cell layer, and decreased matrix metalloproteinase 1 in the skin of mice irradiated with ultraviolet B. Moreover, we found that the mean level of interferon gamma of Mekabu fucoidan-treated, ultraviolet B-irradiated mice (approximately 2.2 ng/mL) was not significantly different from that in normal mice (approximately 2.5 ng/mL). In contrast, a significant decrease in the mean level of interferon gamma (approximately 1.3 ng/mL) in ultraviolet B-irradiated control mice was observed compared with that in Mekabu fucoidan-treated, ultraviolet B-irradiated mice. The mean thickness of the prickle cell layer in the skin of Mekabu fucoidan-treated, ultraviolet B-irradiated mice was less than that in the ultraviolet B-irradiated control mice. Metalloproteinase 1 activity was significantly higher in the skin of ultraviolet B-irradiated mice than in the skin of untreated, nonirradiated normal mice. Metalloproteinase 1 in the skin of ultraviolet B-irradiated, Mekabu fucoidan- or L(+)-ascorbic acid (vitamin C)-treated mice was significantly lower than that in the ultraviolet B-irradiated control mice. Mitigation of the morphological changes in Mekabu fucoidan-treated mice was correlated with a decrease in metalloproteinase 1 levels. These data indicate that Mekabu fucoidan is an effective suppressor of inflammation in an ultraviolet B-irradiated mouse model. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557821
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    ABSTRACT: Four new Amaryllidaceae alkaloids, named lycoranines C-F (1-4), together with seven known ones (5-11) were isolated from the bulbs of Lycoris radiata. Their structures with absolute configurations were elucidated by nuclear magnetic resonance, high-resolution electrospray ionization mass spectrometry, circular dichroism spectra, modified Mosher's method, and molecular modeling calculation. Compounds 6, 7, 10, and 11 exhibited a potent inhibitory effect on A549 and LoVo cells with IC50 values ranging from 3.97 ± 0.36 to 17.37 ± 1.57 µM. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557743
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    ABSTRACT: Dihydrogoniothalamin is a styrylpyrone isolated from the leaves of Aniba panurensis. The present work aimed at investigating the vasorelaxant activity of dihydrogoniothalamin and its underlying mechanism of action in the rat aorta. Dihydrogoniothalamin (0.01-100 µM) induced a concentration-dependent vasodilatation of aortas precontracted with phenylephrine. Endothelium removal or pretreatment of the preparation with NG nitro-L-arginine-methyl-ester abolished the vasodilator response for dihydrogoniothalamin. Pretreatment with calmidazolium did not affect the vasodilator response of dihydrogoniothalamin. On the other hand, wortmannin, a nonselective inhibitor of phosphatidylinositol 3-kinases, and protein kinase B inhibitor IV significantly shifted the concentration-response curve of dihydrogoniothalamin to the right and reduced its maximal effect. A nonselective antagonist of estrogen receptors, ICI 182,780, and a selective antagonist of estrogen receptor α, methyl-piperidino-pyrazole, were able to reduce the relaxation induced by dihydrogoniothalamin, but no effect was observed in the presence of the selective antagonists of estrogen receptor β and G protein-coupled receptor 30, 4-[2-phenyl-5,7-bis(trifluoromethyl)pyrazolo[1,5-a]pyrimidin-3-yl]phenol (PHTPP), and G-15, respectively. Dihydrogoniothalamin also increased the phosphorylation of the activation sites of endothelial nitric oxide synthase and protein kinase B. The present results led us to conclude that dihydrogoniothalamin is a vasodilator drug acting in an endothelium- and nitric oxide-dependent manner through a mechanism involving the activation of nitric oxide synthase via the phosphatidylinositol 3-kinase/protein kinase B pathway, partially by stimulation of estrogen receptor α. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557775
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    ABSTRACT: Yiru Tiaojing Granule, a traditional Chinese medicine formula, is used to treat hyperprolactinemia. This study was conducted to evaluate the mechanism of action and pharmacological activity of Yiru Tiaojing Granule on prolactin secretion. The animal model of hyperprolactinemia was induced by metoclopramide. The dopamine D2 receptor in hyperprolactinemia rat models was analyzed by immunohistochemistry. The biochemical parameters, including a follicle-stimulating hormone, luteinizing hormone, estradiol, progesterone, testosterone, and prolactin, were measured by an enzyme-linked immunosorbent assay. Furthermore, the expression of prolactin and the dopamine D2 receptor was analyzed by Western blotting. The components in the Yiru Tiaojing Granule-medicated serum were assayed by liquid chromatography-tandem mass spectrometry. The Yiru Tiaojing Granule significantly decreased the prolactin level in the hyperprolactinemia rat model, and increased the estradiol, luteinizing hormone, and progesterone levels. The high and medium doses of Yiru Tiaojing Granule reduced dopamine D2 receptor expression in the brain (p < 0.001) and produced a similar effect on bromocriptine (p < 0.001). Yiru Tiaojing Granule-medicated serum reduced (p < 0.001) prolactin expression in MMQ cells in a concentration-dependent manner, but had no effects on GH3 cells. The level of the dopamine D2 receptor in MMQ cells was also increased dose-dependently (p < 0.05). In addition, the protein kinase A and cyclic adenosine monophosphate in MMQ cells were significantly attenuated dose-dependently by treatment with a high and medium dose of Yiru Tiaojing Granule-medicated serum (p < 0.05) and bromocriptine-medicated serum (p < 0.01). The results suggested that Yiru Tiaojing Granule was effective against hyperprolactinemia, and the activation of the dopamine D2 receptor, which was related to the second messenger cyclic adenosine monophosphate and protein kinase A, might be the potential mechanism. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1546208
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    ABSTRACT: Salviaolate is a group of depside salts isolated from Danshen (a traditional Chinese herbal medicine), with ≥ 85 % of magnesium lithospermate B. This study aims to investigate whether salviaolate is able to protect the rat brain from ischemia/reperfusion injury and the underlying mechanisms. Rats were subjected to 2 h of cerebral ischemia and 24 h of reperfusion to establish an ischemia/reperfusion injury model. The neuroprotective effects of salviaolate at different dosages were evaluated. A dosage (25 mg/kg) was chosen to explore the neuroprotective mechanisms of salviaolate. Neurological function, infarct volume, cellular apoptosis, nicotinamide adenine dinucleotide phosphate-oxidase activity, and H2O2 content were measured. In a nerve cell model of hypoxia/reoxygenation injury, magnesium lithospermate B was applied. Cellular apoptosis, lactate dehydrogenase, nicotinamide adenine dinucleotide phosphate-oxidase activity, and H2O2 content were examined. Ischemia/reperfusion treatment significantly increased the neurological deficit score, infarct volume, and cellular apoptosis accompanied by the elevated nicotinamide adenine dinucleotide phosphate-oxidase activity and H2O2 content in the rat brains. Administration of salviaolate reduced ischemia/reperfusion-induced cerebral injury in a dose-dependent manner concomitant with a decrease in nicotinamide adenine dinucleotide phosphate-oxidase activity and H2O2 production. Magnesium lithospermate B (20 mg/kg) and edaravone (6 mg/kg, the positive control) achieved the same beneficial effects as salviaolate did. In the cell experiments, the injury (indicated by apoptosis ratio and lactate dehydrogenase release), nicotinamide adenine dinucleotide phosphate-oxidase activity and H2O2 content were dramatically increased following hypoxia/reoxygenation, which were attenuated in the presence of magnesium lithospermate B (10(-5) M), VAS2870 (nicotinamide adenine dinucleotide phosphate-oxidase inhibitor), or edaravone (10(-5) M). The results suggest that salviaolate is able to protect the brain from ischemia/reperfusion oxidative injury, which is related to the inhibition of nicotinamide adenine dinucleotide phosphate-oxidase and a reduction of reactive oxygen species production. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; DOI:10.1055/s-0035-1557774
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    ABSTRACT: The medicinal plant Pelargonium sidoides DC. (Geraniaceae) was traditionally used for the treatment of the common cold and cough in South Africa. Today an aequous-ethanolic root extract from this plant is approved for the treatment of acute bronchitis and is globally marketed also as an immunostimulant. The increasing demand of the plant material for the industrial production indicates the need of new effective methods for the propagation of P. sidoides. Here we report somatic embryogenesis and in vitro plantlet regeneration from somatic cells of inflorescence shoots and petioles of P. sidoides. A one-week cultivation of explants in media containing different concentrations of thidiazuron (1, 2.2, 3, and 4 mg/L) followed by a cultivation period without phytohormones resulted in the induction of somatic embryos within 2-4 weeks. After 2-4 months, the embryos generated roots and could be transferred into a greenhouse, where flower formation took place and the development of seeds occurred with high germination rates. The root umckalin concentration, determined by high-performance thin-layer chromatography, was comparable to that of seed-cultivated plants (100 ± 6 vs. 113 ± 10 µg umckalin/g dried roots). For the first time, direct somatic embryogenesis has been established as an appropriate cultivation method for P. sidoides plants used as raw material in the pharmaceutical industry. Moreover, genetically identical plants (chemical races) can be easily generated by this procedure. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; 81(12-13):1169-74. DOI:10.1055/s-0035-1545947
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    ABSTRACT: The dried ripe fruits of Xanthium sibiricum (Cang'erzi) are used in traditional Chinese medicine for the treatment of nasal congestion, nasal discharge, allergic rhinitis, sinusitis, and wind-cold headaches. Carboxyatractyloside and atractyloside are important constituents of the fruits because these diterpenoid glycosides are responsible for their toxicity. In order to evaluate procedures for reducing the amount of the more toxic carboxyatractyloside, the fruits were dried and heated with different methods. Carboxyatractyloside and atractyloside were analysed by a new reversed-phase high-performance liquid chromatographic method using liquid chromatography-diode array detector-tandem mass spectrometry analysis. The results revealed that temperature and drying methods have a strong influence on the content of carboxyatractyloside and atractyloside. Fruits which were treated at higher temperatures showed a lower content of carboxyatractyloside and an increased content of atractyloside, which is 50 times less toxic. This indicates that the roasting process can reduce toxicity effectively. The microbiological colonisation of Xanthium fruits is also reduced by roasting and by drying above 100 °C. For the safe use of Cang'erzi, the effect of processing should be monitored and analysis of carboxyatractyloside and atractyloside should be obligatory in quality control. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 08/2015; 81(12-13):1213-20. DOI:10.1055/s-0035-1546207
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    ABSTRACT: Hsp90 is an evolutionarily conserved adenosine triphosphate-dependent molecular chaperone and is one of the most abundant proteins in the cells (1-3 %). Hsp90 is induced when a cell undergoes various types of environmental stresses such as heat, cold, or oxygen deprivation. It is involved in the turnover, trafficking, and activity of client proteins, including apoptotic factors, protein kinases, transcription factors, signaling proteins, and a number of oncoproteins. Most of the Hsp90 client proteins are involved in cell growth, differentiation, and survival, and include kinases, nuclear hormone receptors, transcription factors, and other proteins associated with almost all the hallmarks of cancer. Consistent with these diverse activities, genetic and biochemical studies have demonstrated the implication of Hsp90 in a range of diseases, including cancer, making this chaperone an interesting target for drug research.During the last few decades, plant secondary metabolites have been studied as a major source for lead compounds in drug discovery. Recently, several plant-derived small molecules have been discovered exhibiting inhibitory activity towards Hsp90, such as epigallocatechin gallate, gedunin, lentiginosine, celastrol, and deguelin. In this work, an overview of plant secondary metabolites interfering with Hsp90 activities is provided. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 07/2015; DOI:10.1055/s-0035-1546251
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    ABSTRACT: The pharmacokinetic properties of a new molecular entity are important aspects in evaluating the viability of the compound as a pharmacological agent. The sesquiterpene lactone lychnopholide exhibits important biological activities. The objective of this study was to characterize the pharmacokinetics of lychnopholide after intravenous administration of 1.65 mg/kg (n = 5) and oral administration of 3.3 mg/kg (n = 3) lychnopholide in rats (0.2 ± 0.02 kg in weight) through nonlinear mixed effects modeling and non-compartmental pharmacokinetic analysis. A highly sensitive analytical method was used to quantify the plasma lychnopholide concentrations in rats. Plasma protein binding of this compound was over 99 % as determined by a filtration method. A two-compartment body model plus three transit compartments to characterize the absorption process best described the disposition of lychnopholide after both routes of administration. The oral bioavailability was approximately 68 %. The clearance was 0.131 l/min and intercompartmental clearance was 0.171 l/min; steady-state volume of distribution was 4.83 l. The mean transit time for the absorption process was 9.15 minutes. No flip-flop phenomenon was observed after oral administration. The pharmacokinetic properties are favorable for further development of lychnopholide as a potential oral pharmacological agent. Georg Thieme Verlag KG Stuttgart · New York.
    Planta Medica 07/2015; DOI:10.1055/s-0035-1546214