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This study investigated the growing environmental concern of particulate matter (PM)-induced pulmonary injury and explored novel preventive strategies. In particular, it evaluated the protective effects of Atractylodes japonica Koidz. ex. Kitam root extract (AJ), which is known for its anti-inflammatory and antioxidant properties, against PM2.5-induced subacute pulmonary injuries in Balb/c mice. The experimental design involved administering AJ at a concentration from 400 to 100 mg/kg over a ten-day period, with comparisons made to the mucolytic agent ambroxol hydrochloride (AX). The results revealed that AJ significantly alleviated PM2.5-induced pulmonary injuries, mucus overproduction, and respiratory acidosis in a dose-dependent manner. Notably, body surface redness was reduced by up to 55% at a concentration of 100 mg/kg compared to the control. These effects were evidenced by reduced mRNA expression of the mucus-associated genes MUC5B and MUC5AC and increased concentrations of substance P (up to 475%) and acetylcholine (up to 355%) in the lungs at 400 mg/kg, compared to the intact vehicle control. Particularly, the 400 mg/kg dose of AJ demonstrated comparable effectiveness to AX, highlighting its potent mucolytic and expectorant activities. The results of this study highlight the fact that AJ could act as a promising alternative for respiratory protection, with potential applications as a functional food ingredient. This study substantiates AJ’s role in enhancing respiratory health, emphasizing its capacity as a candidate for further development into therapeutic agents against toxic environmental exposure.

Atractylodes japonica Koidz. ex Kitam. is a perennial herbal plant, and its dried rhizomes have been widely used as traditional medicine in China and Japan. In this study, we assembled and annotated the complete chloroplast (cp) genome sequence of A. japonica using the high-throughput sequencing approach. The cp genome of A. japonica is 153,208 bp in length with the overall GC content of 37.7%, including two inverted repeat (IR) regions of 25,147 bp, which was separated by a large single-copy (LSC) region of 84,255 bp and a small single-copy (SSC) region of 18,659 bp. 113 unique genes were annotated in the genome, including 80 protein-coding genes, 29 represented tRNA genes, and four denoted rRNA genes. A maximum-likelihood phylogenetic analysis with 38 complete cp sequences showed that Atractylodes formed a monophyletic clade, and A. japonica and A. koreana formed a subclade in Atractylodes. This study provides the chloroplast genome structure features and phylogenetic relationship of A. japonica.

Premise Atractylodes japonica (Asteraceae) is endemic to East Asia, where its rhizomes are used in traditional medicine. To investigate the genetic diversity of this species, we developed polymorphic microsatellite markers. Methods and Results We obtained a total of 175,825 simple sequence repeat (SSR) loci using the Illumina HiSeq 2500 system. Eighteen polymorphic SSR primer pairs were selected to determine heterozygosity levels and allele numbers in 80 individuals from four A. japonica populations. The levels of observed and expected heterozygosity ranged from 0.000 to 1.000 and from 0.133 to 0.892, respectively. Cross‐amplification in the related species A. macrocephala and A. lancea was successful in 15 and 14 of the 18 markers, respectively. Conclusions These microsatellite markers will be useful for future studies involving A. japonica population genetics and breeding.

Premise: Atractylodes japonica (Asteraceae) is endemic to East Asia, where its rhizomes are used in traditional medicine. To investigate the genetic diversity of this species, we developed polymorphic microsatellite markers. Methods and Results: We obtained a total of 175,825 simple sequence repeat (SSR) loci using the Illumina HiSeq 2500 system. Eighteen polymorphic SSR primer pairs were selected to determine heterozygosity levels and allele numbers in 80 individuals from four A. japonica populations. The levels of observed and expected heterozygosity ranged from 0.000 to 1.000 and from 0.133 to 0.892, respectively. Cross‐amplification in the related species A. macrocephala and A. lancea was successful in 15 and 14 of the 18 markers, respectively. Conclusions: These microsatellite markers will be useful for future studies involving A. japonica population genetics and breeding. [ABSTRACT FROM AUTHOR]

Plant phytochemical accumulation is influenced by various external factors that change with the seasons (e.g., harvesting time). Atractylodes japonica, an important medicinal plant rich in bioactive compounds, is used to treat several human diseases. We analyzed the influence of harvesting time on phenolic compound concentration and antioxidant activity of A. japonica roots. We investigated the correlation between phenolic compound and minerals contents and antioxidant activity in different harvests. Total phenolic and flavonoid contents varied significantly with the harvesting time. Liquid chromatography–mass spectrometry/mass spectrometry (LC–MS/MS) analysis revealed significant changes in the concentration of various phenolics between harvests. The content of different types of phenolics were significantly higher in the samples collected in October. Among them, chlorogenic acids (133,833.30 µg/g dry weight of root extract) were the most dominant phytochemical compounds detected. Samples harvested in October had higher concentrations of flavonoids, including rutin, orientin, vitexin, and apigenin. Roots harvested in October had a significantly higher (p < 0.05) antioxidant activity than that of those harvested later. Root mineral concentrations also varied with the harvest time. The analysis revealed that macro elements such as Ca ad Mg contents were significantly increased with delaying harvesting time, whereas a different trend was observed for the microelements including Fe, Cu, Al, and As contents in the October harvest. We also found a significant relationship between antioxidant activity and phenolic compound content. The most abundant minerals (Ca, Mg, Mn, Fe, and Al) correlated positively with the antioxidant activity indicating that these elements and compounds may be associated with the A. japonica antioxidant potential. Furthermore, A. japonica root extracts inhibited NIH/3T3 cellular proliferation in a season- and dose-dependent manner. Hence, harvesting time influenced the antioxidant properties and phenolic compound accumulation of A. japonica roots. These results indicate that the harvesting time is essential for obtaining the specific phytochemicals.

Atractylodes japonica Koidz. ex Kitam. is a perennial herbal plant, and its dried rhizomes have been widely used as traditional medicine in China and Japan. In this study, we assembled and annotated the complete chloroplast (cp) genome sequence of A. japonica using the high-throughput sequencing approach. The cp genome of A. japonica is 153,208 bp in length with the overall GC content of 37.7%, including two inverted repeat (IR) regions of 25,147 bp, which was separated by a large single-copy (LSC) region of 84,255 bp and a small single-copy (SSC) region of 18,659 bp. 113 unique genes were annotated in the genome, including 80 protein-coding genes, 29 represented tRNA genes, and four denoted rRNA genes. A maximum-likelihood phylogenetic analysis with 38 complete cp sequences showed that Atractylodes formed a monophyletic clade, and A. japonica and A. koreana formed a subclade in Atractylodes. This study provides the chloroplast genome structure features and phylogenetic relationship of A. japonica. [ABSTRACT FROM AUTHOR]

Background: Atractylodes japonica has been commonly used to treat gastrointestinal (GI) disorders in Korean traditional medicine. Interstitial cells of Cajal (ICCs) are pacemaker cells in the GI tract and can regulate GI motility. Objective: To investigate the effects of the extract of Atractylodes japonica (AJE) on pacemaker potentials generated by ICCs from murine small intestine. Materials and Methods: Enzymatic digestion was performed to dissociate ICCs. All experiments on ICCs were performed after 12 h of culture. The whole-cell patch-clamp configuration was used to record pacemaker potentials generated by ICC. Results: AJE (0.1—1 mg/mL) depolarized pacemaker potentials in a concentration-dependent manner and decreased the amplitudes of pacemaker potentials at all concentrations in the current-clamp mode. Pretreatment with Y25130 (a 5-HT3receptor antagonist), RS39604 (a 5-HT4receptor antagonist), or SB269970 (a 5-HT7receptor antagonist) had no effects on depolarization of pacemaker potentials induced by AJE. In addition, pretreatment with 1,1-dimethyl-4-diphenylacetoxypiperidinium iodide (a muscarinic M3receptor antagonist) inhibited AJE-induced depolarization of pacemaker potential; however, pretreatment with methoctramine (a muscarinic M2receptor antagonist) did not affect depolarization of pacemaker potentials induced by AJE. In the presence of an external Na+-free solution, the pacemaker potentials decreased, and under this condition, AJE did not depolarize the pacemaker potentials. Flufenamic acid, a nonselective cation channel (NSCC) blocker, decreased the pacemaker potential, which in turn inhibited AJE-induced depolarization of pacemaker potential. Conclusion: The results of this study suggest that AJE depolarized the pacemaker potentials generated by ICC by stimulating muscarinic M3receptors, but not 5-HT receptors, through NSCCs. Therefore, AJE can be a novel prokinetic agent. Abbreviations used: ICCs:Interstitial cells of Cajal, GI:Gastrointestinal, NSCC:Non-selective cation channel, TRP:Transient receptor potential. [ABSTRACT FROM AUTHOR]

An intensive survey of naturally-occurring regulators of polar auxin transport (PAT) was conducted in two oriental medicinal species from the Asteraceae, Saussurea costus and Atractylodes japonica, using the radish hypocotyl bioassay system and physicochemical analyses. Costunolide and santamarine were identified as well as dehydrocostus lactone from S. costus roots, and atractylenolide II and (+)-eudesma-4(14),7(11)-dien-8-one from Atractylodes japonica rhizomes as physiologically novel compounds possessing inhibitory activities of PAT. Costunolide and santamarine showed ca. 40% inhibition of PAT in the radish hypocotyl segments at a dose of 2.5 μg/plant and 1 μg/plant, respectively. Inhibitory effects of atractylenolide II and (+)-eudesma-4(14),7(11)-dien-8-one were ca. 10 times lower than those of costunolide and santamarine. Structure–activity relationships and possible mechanisms to inhibit PAT are also discussed.

Atractylodes japonica is a perennial herb in Compositae family, which is used for stomach disorders as a traditional Chinese medicine (Guo et al. ). In 2013, a leaf spot disease was first observed on plants of A. japonica in a production field of Fushun County, Liaoning Province, China. The disease had a speckled appearance initially. Lesions with grey-white centre and brown margin gradually developed and enlarged. Eventually, infections usually caused yellowing of the leaves and premature defoliation. The causal agent of infection on plants was identified as Paraphoma chrysanthemicola based on morphological and cultural characteristics, pathogenicity tests and phylogenetic analysis. To our knowledge, this is the first report of a leaf spot disease on A. japonica caused by P. chrysanthemicola in China. [ABSTRACT FROM AUTHOR]

Background/Aims: There are limited therapeutic options available for irritable bowel syndrome with diarrhea (IBS-D). We tested the effects of Atractylodes japonica rhizome, a perennial plant native to North Asia, on both upper and lower gastrointestinal (GI) motility in guinea pigs. Methods: The extract of A. japonica rhizome was administered orally at different doses to test its effects on upper GI motility as determined from charcoal transit in native guinea pigs and in guinea pigs pretreated with thyrotropin-releasing hormone or mustard oil. Regarding its effect on lower GI motility, the removed guinea pig colon was suspended in a chamber containing Krebs-Henseleit solution and the transit time of artificial feces was measured with various dilutions of the extract. As for in vivo assay, weight and number of fecal pellets expelled were determined under the same drug preparation used in upper GI motility experiment. Results: The extract of A. japonica rhizome had no significant effect on upper GI motility in either normal or altered physiological states. However, the extract increased colonic transit time in the in vitro model. In the fecal expulsion study, the cumulative weight and number of pellets did not differ significantly between the control group and groups treated with the extracts. In the animals pretreated in vivo with thyrotropin-releasing hormone, however, the weight and number of fecal pellets were significantly decreased in animals treated with 300 mg/kg and 600 mg/kg doses of extract. Conclusions: Our findings suggest that the extract of A. japonica rhizome can be a potential agent for IBS-D. [ABSTRACT FROM AUTHOR]

Plant phytochemical accumulation is influenced by various external factors that change with the seasons (e.g., harvesting time). Atractylodes japonica, an important medicinal plant rich in bioactive compounds, is used to treat several human diseases. We analyzed the influence of harvesting time on phenolic compound concentration and antioxidant activity of A. japonica roots. We investigated the correlation between phenolic compound and minerals contents and antioxidant activity in different harvests. Total phenolic and flavonoid contents varied significantly with the harvesting time. Liquid chromatography–mass spectrometry/mass spectrometry (LC–MS/MS) analysis revealed significant changes in the concentration of various phenolics between harvests. The content of different types of phenolics were significantly higher in the samples collected in October. Among them, chlorogenic acids (133,833.30 µg/g dry weight of root extract) were the most dominant phytochemical compounds detected. Samples harvested in October had higher concentrations of flavonoids, including rutin, orientin, vitexin, and apigenin. Roots harvested in October had a significantly higher (p < 0.05) antioxidant activity than that of those harvested later. Root mineral concentrations also varied with the harvest time. The analysis revealed that macro elements such as Ca ad Mg contents were significantly increased with delaying harvesting time, whereas a different trend was observed for the microelements including Fe, Cu, Al, and As contents in the October harvest. We also found a significant relationship between antioxidant activity and phenolic compound content. The most abundant minerals (Ca, Mg, Mn, Fe, and Al) correlated positively with the antioxidant activity indicating that these elements and compounds may be associated with the A. japonica antioxidant potential. Furthermore, A. japonica root extracts inhibited NIH/3T3 cellular proliferation in a season- and dose-dependent manner. Hence, harvesting time influenced the antioxidant properties and phenolic compound accumulation of A. japonica roots. These results indicate that the harvesting time is essential for obtaining the specific phytochemicals. [ABSTRACT FROM AUTHOR]

• Gas purge micro solvent extraction method was applied for the first time to obtain essential oil fingerprints from plants. • Broad spectrum information on volatile and semi-volatile fraction of medicinal plant was obtained. • The proposed method allows better extraction performances for semi-volatile compounds respect to classical steam distillation. • Atractylodes japonica , Atractylodes lancea , and Atractylodes macrocephal essential oils were characterized and compared. In this work, a new an innovative micro liquid extraction technique named "gas purge micro solvent extraction" (GP-MSE) have been tested, hyphenated with gas chromatography-mass spectrometry (GC–MS), to evaluate its capability to extract volatile fractions from vegetal samples respect to classical steam distillation extraction procedure, by comparing essential oil fingerprints from three different Atractylodes species. GP-MSE showed higher extraction capabilities and sensitivities (in particular for semi-volatile components), obtaining more structured essential oil fingerprints with high reliabilities (relative standard deviation of the peak areas between 0.34% and 5.83%), requiring at the same time smaller sample amounts and reduced extraction times. Essential oil profile data were also submitted to principal component analysis and included cosine angle in order to highlight differences among the Atractylodes species under investigation. GP-MSE can be considered an alternative, simple, fast, sensitive and environmentally friendly extraction method, with high extraction efficiencies and reproducibility toward both volatile and semi-volatile compounds. [ABSTRACT FROM AUTHOR]

Atractylodes japonica Koidz. ex Kitam. is a perennial herbal plant, and its dried rhizomes have been widely used as traditional medicine in China and Japan. In this study, we assembled and annotated the complete chloroplast (cp) genome sequence of A. japonica using the high-throughput sequencing approach. The cp genome of A. japonica is 153,208 bp in length with the overall GC content of 37.7%, including two inverted repeat (IR) regions of 25,147 bp, which was separated by a large single-copy (LSC) region of 84,255 bp and a small single-copy (SSC) region of 18,659 bp. 113 unique genes were annotated in the genome, including 80 protein-coding genes, 29 represented tRNA genes, and four denoted rRNA genes. A maximum-likelihood phylogenetic analysis with 38 complete cp sequences showed that Atractylodes formed a monophyletic clade, and A. japonica and A. koreana formed a subclade in Atractylodes . This study provides the chloroplast genome structure features and phylogenetic relationship of A. japonica ., Competing Interests: The authors reported no potential conflict of interest., (© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

The rhizomes of many Atractylodes species, including Atractylodes chinensis Koidzumi, Atractylodes macrocephala Koidzumi, and Atractylodes japonica Koidzumi, are collectively termed Atractylodis Rhizoma. We prepared n-hexane extracts of the three species and evaluated their anti-inflammatory effects on lipopolysaccharide (LPS)-induced RAW 264.7 cells. Among all n-hexane extracts, those of A. japonica most strongly inhibited nitric oxide (NO) production in LPS-induced RAW 264.7 cells; five sesquiterpenes, atractylon, atractylenolide I, atractylenolide II, atractylenolide III, and 8-epiasterolid, were isolated from A. japonica. The phytochemical content of A. japonica was similar to those of A. chinensis and A. macrocephala. Moreover, the atractylon concentration was higher in A. japonica than in A. chinensis and A. macrocephala. Atractylon significantly inhibited NO and prostaglandin E2 production as well as inducible NO synthase and cyclooxygenase-2 expression in LPS-induced RAW 264.7 cells. Atractylon (40 mg/kg) also significantly reduced the acetic-acid-induced writhing response, carrageenan-induced paw edema, and hot-plate latent pain response in mice. According to the results, A. japonica has anti-inflammatory and antinociceptive effects and atractylon is the major active component of A. japonica. Therefore, atractylon can be used as a bioactivity marker in A. japonica.

Background/aims: There are limited therapeutic options available for irritable bowel syndrome with diarrhea (IBS-D). We tested the effects of Atractylodes japonica rhizome, a perennial plant native to North Asia, on both upper and lower gastrointestinal (GI) motility in guinea pigs., Methods: The extract of A. japonica rhizome was administered orally at different doses to test its effects on upper GI motility as determined from charcoal transit in native guinea pigs and in guinea pigs pretreated with thyrotropin-releasing hormone or mustard oil. Regarding its effect on lower GI motility, the removed guinea pig colon was suspended in a chamber containing Krebs-Henseleit solution and the transit time of artificial feces was measured with various dilutions of the extract. As for in vivo assay, weight and number of fecal pellets expelled were determined under the same drug preparation used in upper GI motility experiment., Results: The extract of A. japonica rhizome had no significant effect on upper GI motility in either normal or altered physiological states. However, the extract increased colonic transit time in the in vitro model. In the fecal expulsion study, the cumulative weight and number of pellets did not differ significantly between the control group and groups treated with the extracts. In the animals pretreated in vivo with thyrotropin-releasing hormone, however, the weight and number of fecal pellets were sig-nificantly decreased in animals treated with 300 mg/kg and 600 mg/kg doses of extract., Conclusions: Our findings suggest that the extract of A. japonica rhizome can be a potential agent for IBS-D.