[Synthesis and tissue distribution of bufadienolides in Bufo bufo gargarizans].

This study explored the biosynthesis of bufadienolides(BDs) in Bufo bufo gargarizans to solve the dilemma of the decreasing resources of B. bufo gargarizans and provide a theoretical basis for the sustainable utilization of the resources. Ultra-high performance liquid chromatography-Orbitrap-mass spectrometry(UHPLC-Orbitrap-MS) was employed to detect the synthesis sites of BDs in B. bufo gargarizans, and the results were verified by desorption electrospray ionization-mass spectrometry imaging(DESI-MSI) and homogenate incubation experiments. BDs in B. bufo gargarizans had the highest content in the liver and the highest concentration in the gallbladder, in addition to the parotid gland and skin, which suggested that the liver could synthesize BDs. The results of DESI-MSI also showed that BDs were mainly enriched in the liver rather than the immature parotid gland. The incubation experiment of liver homogenates demonstrated the liver of B. bufo gargarizans had the ability to synthesize BDs. This study showed that the liver was a major organ for the synthesis of BDs in B. bufo gargarizans during metamorphosis, development, and growth, which provided strong theoretical support for the biosynthesis of BDs and the sustainable utilization of B. bufo gargarizans resources.

Study on the potential mechanism of Qingxin Lianzi Yin Decoction on renoprotection in db/db mice via network pharmacology and metabolomics.

BACKGROUND: Diabetic nephropathy (DN) was one of the most popular and most significant microvascular complications of diabetes mellitus. Qingxin Lianzi Yin Decoction (QXLZY) was a traditional Chinese classical formula, suitable for chronic urinary system diseases. QXLZY had good clinical efficacy in early DN, but the underlying molecular mechanism remained unrevealed. PURPOSE: This study aimed to establish the content determination method of QXLZY index components and explore the mechanism of QXLZY on DN by network pharmacology and metabolomics studies. METHODS: Firstly, the content determination methods of QXLZY were established with calycosin-7-O-ß-d-glucoside, acteoside, baicalin and glycyrrhizic acid as index components. Secondly, pharmacological experiments of QXLZY were evaluated using db/db mice. UHPLC-LTQ-Orbitrap MS was used to carry out untargeted urine metabolomics, serum metabolomics, and kidney metabolomics studies. Thirdly, employing network pharmacology, key components and targets were analyzed. Finally, targeted metabolomics studies were performed on the endogenous constituents in biological samples for validation based on untargeted metabolomics results. RESULTS: A method for the simultaneous determination of multiple index components in QXLZY was established, which passed the comprehensive methodological verification. It was simple, feasible, and scientific. The QXLZY treatment alleviated kidney injury of db/db mice, included the degree of histopathological damage and the level of urinary microalbumin/creatinine ratio. Untargeted metabolomics studies had identified metabolic dysfunction in pathways associated with amino acid metabolism in db/db mice. Treatment with QXLZY could reverse metabolite abnormalities and influence the pathways related to energy metabolism and amino acid metabolism. It had been found that pathways with a high degree were involved in signal transduction, prominently on amino acids metabolism and lipid metabolism, analyzed by network pharmacology. Disorders of amino acid metabolism did occur in db/db mice. QXLZY could revert the levels of metabolites, such as quinolinic acid, arginine, and asparagine. CONCLUSION: This study was the first time to demonstrate that QXLZY alleviated diabetes-induced pathological changes in the kidneys of db/db mice by correcting disturbances in amino acid metabolism. This work could provide a new experimental basis and theoretical guidance for the rational application of QXLZY on DN, exploring the new pharmacological effect of traditional Chinese medicine, and promoting in-depth research and development.

Mechanism through which the hsa-circ_0000992- hsa- miR- 936-AKT3 regulatory network promotes the PM2.5-induced inflammatory response in human bronchial epithelial cells.

BACKGROUND: Studies have shown that fine particulate matter (PM2.5) remains a significant problem in developing countries and plays a critical role in the onset and progression of respiratory illnesses. Circular RNAs (circRNAs) are involved in many pathophysiological processes,but their relationship to PM2.5 pollution is largely unexplored. OBJECTIVES: To elucidate the functional role of hsa_circ_0000992 in PM2.5-induced inflammation in a human bronchial epithelial cell line (16HBE) and to clarify whether the competing endogenous RNA (ceRNA) mechanism is involved in the interrelationships between hsa_circ_0000992 and hsa-miR-936 and the inflammatory signaling pathways. METHODS: Detection of inflammatory factors in 16HBE cells exposed to PM2.5 by RT-qPCR and ELISA.High throughput sequencing and bioinformatics analysis methods were used to screen circRNA.The bioinformatics analysis method western blotting and dual-luciferase reporter gene system were used to verify mechanisms associated with circRNA. RESULTS: PM2.5 cause inflammation in the 16HBE cells. High throughput sequencing and RT-qPCR result revealed that the expression of hsa_circ_0000992 was markedly up-regulated in 16HBE exposed to PM2.5. The binding sites between hsa_circ_0000992 and hsa-miR-936 was confirmed by dual-luciferase reporter gene system.Western blotting and RT-qPCR showed that hsa_circ_0000992 can interact with hsa-miR-936 to regulate AKT serine/threonine kinase 3(AKT3),thereby activating the PI3K/AKT pathway and ultimately promoting the expression of interleukin (IL)- 1ß and IL-8. CONCLUSION: PM2.5 can induce the inflammatory response in 16HBE cells by activating the PI3K/AKT pathway. The expression of hsa_circ_0000992 increased when PM2.5 stimulated 16HBE cells,and the circRNA could then regulate the inflammatory response.Hsa_circ_0000992 regulates the hsa-miR-936/AKT3 axis through the ceRNA mechanism,thereby activating the PI3K/AKT signaling pathway,increasing the expression of cellular inflammatory factors,and promoting PM2.5-induced respiratory inflammation.

[Study on biomarkers of acteoside in treating puromycin aminonucleoside nephropathy in young rats based on non-targeted urine metabolomics technology].

This study aims to reveal the endogenous metabolic characteristics of acteoside in the young rat model of purinomycin aminonucleoside nephropathy(PAN) by non-targeted urine metabolomics and decipher the potential mechanism of action. Biochemical indicators in the urine of rats from each group were determined by an automatic biochemical analyzer. The potential biomarkers and related core metabolic pathways were identified by ultra-high performance liquid chromatography coupled with linear ion trap-Orbitrap mass spectrometry(UHPLC-LTQ-Orbitrap MS) combined with principal component analysis(PCA) and orthogonal partial least squares-discriminant analysis(OPLS-DA). MetaboAnalyst 5.0 was used to establish the receiver operating characteristic(ROC) curve for evaluating the clinical diagnostic performance of core metabolites. The results showed that acteoside significantly decreased urinary protein-to-creatinine ratio in PAN young rats. A total of 17 differential metabolites were screened out by non-targeted urine metabolomics in PAN young rats and they were involved in phenylalanine metabolism and phenylalanine, tyrosine and tryptophan biosynthesis. Thirtten differential metabolites were screened by acteoside intervention in PAN young rats, and they were involved in phenylalanine metabolism and arginine and proline metabolism. Among them, leucylproline and acetophenone were the differential metabolites that were significantly recovered after acteoside treatment. These pathways suggest that acteoside treats PAN in young rats by regulating amino acid metabolism. The area under the curve of two core biomarkers, leucylproline and acetophenone, were both greater than 0.9. In summary, acteoside may restore amino acid metabolism by regulating endogenous differential metabolites in PAN young rats, which will help to clarify the mechanism of acteoside in treating chronic glomerulonephritis in children. The characteristic biomarkers screened out have a high diagnostic value for evaluating the treatment of chronic glomerulonephritis in children with acteoside.

[Component profile analysis of Sanhan Huashi Formula based on UHPLC-LTQ-Orbitrap-MS, GC-MS, and UHPLC-QQQ-MS/MS].

This study comprehensively analyzed the active components of Sanhan Huashi Formula using qualitative and quantitative mass spectrometry techniques, laying the foundation for understanding its pharmacological substance basis. UHPLC-LTQ-Orbitrap-MS and GC-MS technologies were used to analyze and identify the volatile and non-volatile components in Sanhan Huashi Formula. UHPLC-QQQ-MS/MS technology was used to simultaneously determine the content of 27 major active components in the formula. The results showed that 308 major chemical components were identified in Sanhan Huashi Formula, among which 60 compounds were identified by comparing with reference standards, mainly including alkaloids, flavonoids, coumarins, triterpenoid saponins, amino acids, and nucleosides. GC-MS technology preliminarily identified 52 volatile compounds, with γ-eudesmol and ß-eudesmol as the main components. The quantitative results demonstrated good linearity(r>0.99) for the 27 active components, indicating the stability, simplicity, and reliability of the established method. Among them, amygdalin, nodakenin, arecoline, ephedrine, and pseudoephedrine had relatively high content and were presumably the main pharmacologically active substances. In conclusion, this study systematically and comprehensively characterized the major chemical components and patterns in Sanhan Huashi Formula, providing a basis for understanding its pharmacological mechanisms and clinical applications.

[Tissue distribution of Qingfei Paidu Decoction based on HPLC-MS/MS].

The tissue distribution of Qingfei Paidu Decoction was studied by HPLC-MS/MS in vivo. Hypersil GOLD C_(18) column(2.1 mm×50 mm, 1.9 µm) was used for gradient elution with acetonitrile as the mobile phase A and 0.1% formic acid solution as the mobile phase B. High-resolution liquid chromatography-mass spectrometry in both positive and negative ion scanning mode and multiple response monitoring(MRM) mode was employed to analyze the behaviors of the active components of Qingfei Paidu Decoction in diffe-rent tissues. The results showed that 19, 9, 17, 14, 22, 19, 24, and 2 compounds were detected in plasma, heart, liver, spleen, lung, kidney, large intestine, and brain, respectively. The compounds belonged to 8 groups, covering 14 herbs in the prescription. After administration with Qingfei Paidu Decoction, the compounds were rapidly distributed in various tissues, especially in the lung, liver, large intestine, and kidney. The majority of the compounds displayed secondary distribution. This study comprehensively analyzed the distribution rules of the main active components in Qingfei Paidu Decoction and provided a basis for the clinical application.

[Mechanism of Xiaoer Chiqiao Qingre Granules in clearing heat and removing food stagnation in suckling rats with fever and food accumulation based on metabolomics].

Children's fever is often accompanied by food accumulation. Traditional Chinese medicine believes that removing food stagnation while clearing heat of children can effectively avoid heat damage. To systematically evaluate the efficacy of Xiaoer Chiqiao Qingre Granules(XRCQ) in clearing heat and removing food accumulation and explore its potential mechanism, this study combined suckling SD rats fed with high-sugar and high-fat diet with injection of carrageenan to induce rat model of fever and food accumulation. This study provided references for the study on the pharmacodynamics and mechanism of XRCQ. The results showed that XRCQ effectively reduced the rectal temperature of suckling rats, improved the inflammatory environment such as the content of interleukin-1ß(IL-1ß), interleukin-2(IL-2), interferon-γ(IFN-γ), white blood cells, and monocytes. XRCQ also effectively repaired intestinal injury and enhanced intestinal propulsion function. According to the confirmation of its efficacy of clearing heat, the thermolytic mechanism of XRCQ was further explored by non-targeted and targeted metabolomics methods based on LTQ-Orbitrap MS/MS and UPLC-QQQ-MS/MS. Non-target metabolomics analysis of brain tissue samples was performed by QI software combined with SIMCA-P software, and 22 endogenous metabolites that could be significantly regulated were screened out. MetaboAnalyst pathway enrichment results showed that the intervention mechanism was mainly focused on tyrosine metabolism, tricarboxylic acid cycle, inositol phosphate metabolism, and other pathways. At the same time, the results of targeted metabolomics of brain tissue samples showed that XRCQ changed the vitality of digestive system, and inhibited abnormal energy metabolism and inflammatory response, playing a role in clearing heat and removing food stagnation from multiple levels.

[Clinical application value of Huanglian Jiedu Pills in improving syndrome of excess heat and fire toxin based on phase â ¡ clinical trial study on plasma ATP, 4-HNE, and ACTH levels].

A randomized, double-blind, placebo-controlled, multi-center phase Ⅱ clinical trial design was used in this study to recruit subjects who were in line with the syndrome of excess heat and fire toxin, and were diagnosed as recurrent oral ulcers, gingivitis, and acute pharyngitis. A total of 240 cases were included and randomly divided into a placebo group and a Huanglian Jiedu Pills group. The clinical efficacy of Huanglian Jiedu Pills in treating the syndrome of excess heat and fire toxin was evaluated by using the traditional Chinese medicine(TCM) syndrome scale. Enzyme-linked immunosorbent assay(ELISA) was used to determine and evaluate the levels of adenosine triphosphate(ATP), 4-hydroxynonenal(4-HNE), and adrenocorticotropic hormone(ACTH) in plasma of the two groups before and after administration and to predict their application value as clinical biomarkers. The results showed that the disappearance rate of main symptoms in the Huanglian Jiedu Pills group was 69.17%, and that in the placebo group was 50.83%. The comparison between the Huanglian Jiedu Pills group and the placebo group showed that 4-HNE before and after administration was statistically significant(P<0.05). The content of 4-HNE in the Huanglian Jiedu Pills group decreased significantly after administration(P<0.05), but that in the placebo group had no statistical significance and showed an upward trend. After administration, the content of ATP in both Huanglian Jiedu Pills group and placebo group decreased significantly(P<0.05), indicating that the energy metabolism disorder was significantly improved after administration of Huanglian Jiedu Pills and the body's self-healing ability also alleviated the increase in ATP level caused by the syndrome of excess heat and fire toxin to a certain extent. ACTH in both Huanglian Jiedu Pills group and placebo group decreased significantly after administration(P<0.05). It is concluded that Huanglian Jiedu Pills has a significant clinical effect, and can significantly improve the abnormal levels of ATP and 4-HNE in plasma caused by the syndrome of excess heat and fire toxin, which are speculated to be the effective clinical biomarkers for Huanglian Jiedu Pills to treat the syndrome of excess heat and fire toxin.

[Biomarkers related to cognitive dysfunction in APP/PS1 mice based on non-targeted metabonomics and intervention mechanism of Huanglian Jiedu Decoction].

Through the non-targeted metabonomics study on endogenous substances in APP/PS1 transgenic mice, this paper aimed to discover biomarkers related to APP/PS1 mice with cognitive dysfunction, and find targets of Huanglian Jiedu Decoction(HLJDD) in the treatment of Alzheimer's disease(AD) and its mechanism. The brain tissue and serum metabolic mass spectrometry of mice were analyzed by ultra-high performance liquid chromatography-Orbitrap mass spectrometry(UPLC-Orbitrap MS). Through partial least squares-discriminant analysis(PLS-DA) and orthogonal partial least squares-discriminant analysis(OPLS-DA), the metabolic data of the normal group, the model group, the high-dose and low-dose HLJDD groups, and the berberine group were compared and analyzed to screen out potential biomarkers, and the relevant metabolic pathways were constructed with the help of the Kyoto Encyclopedia of Genes and Genomes(KEGG) database. Forty-five potential endogenous metabolites were identified, including 13 in brain and 35 in serum, among which leukotriene B4, tyrosine, and adenosine were expected to be differential metabolites related to cognitive function. HLJDD recalled 22 differential metabolites, and the pathways mainly involved in aminoacyl-tRNA biosynthesis, valine, leucine and isoleucine biosynthesis, pantothenic acid and coenzyme A biosynthesis, phenylalanine, tyrosine and tryptophan biosynthesis, and arachidonic acid metabolism. These pathways suggested that the main mechanism of HLJDD in the intervention of AD was to inhibit central and peripheral inflammation, and regulate energy metabolism, fatty acid metabolism, and amino acid metabolism. HLJDD has a certain effect on the improvement of cognitive dysfunction, and regulates relative pathways by recalling endogenous differential metabolites, which helps to further discover the biomarkers of AD and clarify the intervention mechanism of HLJDD in the treatment of AD.

[Inhibition of the Wnt signaling pathway contributes to the cardiac protection of exercise training in spontaneously hypertensive rats].

The objective of this study was to investigate the cardiac protective effect of low-to-moderate intensity exercise training and the role of the Wnt signaling pathway in spontaneously hypertensive rats (SHR). SHR and Wistar-Kyoto (WKY) rats were randomly divided into 5 groups, namely hypertensive control (SHR-S), hypertensive plus exercise training (SHR-E), normal blood pressure control (WKY-S), normal blood pressure plus exercise training (WKY-E) and SHR-E plus Wnt agonist (SHR-E-Wnt). The rats in SHR-E and WKY-E groups underwent low-to-moderate intensity swimming for 16 weeks, and the rats in SHR-E-Wnt group were injected with Wnt agonist 1 through tail vein 4 weeks before the end of swimming. The blood pressure of rats was measured every week. After exercise training, the left ventricular wall thickness and ejection function were measured by ultrasound cardiogram, myocardial structure and collagen fiber changes were observed by HE staining and Masson staining, and the expression levels of ß-catenin and Dishevelled-1 (DVL-1) mRNA and protein in left ventricular myocardium were detected by real-time fluorescence quantitative PCR and Western blot, respectively. The results showed that the body weight was decreased (P < 0.05), blood pressure was increased (P < 0.01), heart weight and ventricular wall thickness were increased (P < 0.01), and the left ventricular ejection function was decreased (P < 0.05) in SHR-S group compared with those in WKY-S group. In addition, the heart structure was damaged, collagen fibers were significantly increased, and the mRNA and protein expressions of ß-catenin and DVL-1 in the left ventricle were significantly up-regulated in SHR-S group compared with those in WKY-S group (P < 0.01). Compared with those in SHR-S group, the body weight of SHR-E group did not change significantly (P > 0.05), but the blood pressure was decreased (P < 0.01), heart weight and ventricular wall thickness were diminished, ejection function was increased (P < 0.01), myocardial structure injury was significantly improved, collagen fibers were significantly reduced, and mRNA and protein expression levels of ß-catenin and DVL-1 in the left ventricle were significantly down-regulated (P < 0.01) in SHR-E group. Importantly, exercise-induced antihypertensive and cardioprotective effects in SHR were blunted by Wnt agonist. These results suggest that low-to-moderate intensity exercise training exerts cardioprotective effects in SHR, possibly through inhibiting the Wnt signaling pathway.

Relationship between Coronary Artery Tortuosity and Cardiorespiratory Fitness in Patients without Obstructed Coronaries.

OBJECTIVE: This study aimed to analyze the relationship between cardiorespiratory fitness (CRF) and the increasing severity of coronary artery tortuosity (CAT) in patients with non-stenosed coronaries. METHODS: A total of 396 patients who underwent coronary angiography and cardiopulmonary exercise testing (CPET) between August 2020 and July 2021 were included in this single-center retrospective study after excluding patients with significant coronary artery disease (≥50% stenosis). Patients were divided into two groups: no or mild coronary artery tortuosity (N/M-CAT) and moderate to severe coronary artery tortuosity (M/S-CAT) and laboratory electrocardiographic, echocardiographic, and CPET parameters were compared between two groups. RESULTS: M/S-CAT was found in 46.9% of the study participants, with 66.7% being women. M/S-CAT was significantly associated with advanced age (P=0.014) and females (P=0.001). Diastolic dysfunction parameters, E velocity (P=0.011), and E/A ratio (P=0.004) also revealed significant differences between the M/S-CAT group and N/M-CAT group. VO2@peak (1.22±0.39 vs. 1.07±0.39, P<0.01) and VO2@AT (0.77±0.22 vs. 0.71±0.21, P=0.017) were significantly lower in the M/S-CAT group than in the N/M-CAT group. Multivariate logistic regression analysis identified females (OR=0.448; 95% CI, 0.296-0.676; P=0.000) and E/A ratio (OR=0.307; 95% CI, 0.139-0.680; P=0.004) to be independent risk factors of M/S-CAT and showed no association of CPET parameters to M/S-CAT. CONCLUSION: The results indicate that increasing severity of CAT is strongly associated with female gender and E/A ratio and is not directly correlated with decreasing CRF. Further research with a larger patient population and a longer follow-up time is required to fully comprehend the impact of CAT on CRF.

[Determination of neohesperidin and naringin in Qingfei Paidu Granules by RP-HPLC and their transfer rates in preparation process].

The present study established an RP-HPLC method for simultaneous determination of two active components in Qingfei Paidu Granules and investigated the transfer rates of neohesperidin and naringin in the preparation process to provide references for improving the quality control standard and production of Qingfei Paidu Granules.RP-HPLC was performed on a YMC Triart C_(18) column(4.6 mm×150 mm, 5 µm)with column temperature of 30 ℃, acetonitrile(A) and 0.2% phosphoric acid solution(B) as mobile phases for gradient elution at a flow rate of 1.0 mL·min~(-1) and detection wavelength of 284 nm.Good linearity was observed for naringin at 0.10-1.0 µg(R~2=0.999 9) and neohesperidin at 0.12-1.2 µg(R~2=0.999 9).The average recovery of naringin was 99.52% with an RSD of 1.2%, and that of neohesperidin was 100.8% with an RSD of 1.2%.The transfer rates of naringin and neohesperidin between medicinal materials, extracts, concentrates, and granules were measured by this method.The average transfer rate of naringin from medicinal materials to granules was 54.89%±4.38%, and that of neohesperidin was 57.63%±5.88%.The process from medicinal materials to extracts was presumedly the key link affecting the whole preparation process.The established method is simple and sensitive and can be adopted for the quality control of Qingfei Paidu Granules.Meanwhile, it can be used to investigate the transfer rate of neohesperidin and naringin in the preparation of Qingfei Paidu Granules, and further improve the quality control standard of Aurantii Fructus Immaturus in Qingfei Paidu Granules.

[Comprehensive evaluation system for quality of Chinese medicinal decoction pieces based on "experience-ingredients-activity-electronic sensing"].

Quality evaluation of Chinese medicinal decoction pieces is vital for the development of the downstream industries, and is an important channel for implementing the strategy of "higher quality, higher price, and priority for the high quality" for traditional Chinese medicine. At the moment, the quality of Chinese medicinal decoction pieces is mainly evaluated based on chemical component examination. Considering the weak preliminary research foundation and poor research conditions, traditional experience-based evaluation is undervalued in the quality rating of Chinese medicinal decoction pieces. However, traditional experience is a summary of the quality of Chinese medicinal materials based on clinical experience, which thus can be a potential basis for the quality evaluation of the decoction pieces. It is a challenge in the evaluation of Chinese medicinal decoction pieces to objectify the traditional experience-based evaluation from multiple aspects such as chemistry, effect, and characterization via modern techniques. Therefore, this study developed the "experience-ingredients-activity-electronic sensing" evaluation system for Chinese medicinal decoction pieces on the basis of experience-based assessment, chemical ingredients that can truly reflect the traditional experience, biological effect assessment, and electronic sensory evaluation, which is expected to quantify the traditional experience of quality evaluation of Chinese medicinal decoction pieces via chemistry, biology, and sensory simulation. The evaluation system can serve as a reference for clinical experience-based quality evaluation of Chinese medicinal decoction pieces.

[Pollution Characteristics and Risk Assessment of Nutrients and Heavy Metals in Sediments of the Fuhe River Influenced Area, Baiyangdian Lake].

Based on the flow direction of the Fuhe River into Baiyangdian Lake, the impacted area of the Fuhe River was divided into 6 subareas, and sediments from 48 sites were collected in November 2020. The characteristics and risks of sediment nutrients and heavy metal pollution in these six subareas were investigated. The results showed that the average ω(TN), ω(TP), and ω(TOC) were 1841 mg·kg-1, 769 mg·kg-1, and 1.77%, respectively. The major heavy metals were Cd, Cu, Zn, Hg, and Pb, which were 3.73, 1.50, 1.42, 1.31, and 1.31 times the soil background values for Hebei Province, respectively. The TP and heavy metal (Cd, Cu, Zn, Hg, and Pb) content showed a decreasing trend from the Fuhe River estuary to the downstream Zaolinzhuang, whereas the TN and TOC content showed no marked trends. TN, TP, TOC, and heavy metals (Cd, Cu, Zn, Hg, and Pb) were enriched in surface sediments (0-10 cm). The TP content in the surface sediments (0-10 cm) of the Fuhe River estuary, Fuhe River estuary-Nanliuzhuang, and Nanliuzhuang subareas were heavily polluted; the Wangjiazhai and Guangdian subareas were moderately polluted; and the Zaolinzhuang subarea was slightly polluted. Cd and Hg were the major contributors to heavy metal pollution, which were at considerable risk and moderate risk levels, respectively. The heavy metals in surface sediments (0-10 cm) of the Fuhe River estuary, Fuhe River estuary-Nanliuzhuang, and Nanliuzhuang subareas were at a considerable risk level, and the sediments below 30 cm presented a low risk level. The leaching concentrations of heavy metals in sediments from the subarea of severe ecological risk level were far less than the identification standard values of leaching toxicity, suggesting that the sediments can be treated as general waste after dredging.

[Determination and comparison of 10 active components in different parts of Loropetalum chinensis based on ultra-high performance liquid chromatography-tandem mass spectrometry].

To establish a method for the simultaneous determination of ellagic acid, quercetin, gallic acid, kaempferol, myricetin, tiliroside, salidroside, isoquercetin, chlorogenic acid, and quinic acid in the leaves, flowers, fruits, and roots of Loropetalum chinensis by ultra-performance liquid chromatography-tandem mass spectrometry, and provide references for the development and utilization of L. chinensis resources. The analysis was performed on the chromatographic column ACQUITY UPLC HSS T3(2.1 mm×100 mm, 1.8 µm) with a gradient mobile phase of acetonitrile-0.2% formic solution at the flow rate of 0.3 mL·min~(-1). Column temperature was 30 ℃ and injection volume was 2 µL. Multiple reactive ion monitoring mode(MRM) was used in the negative ion ionization mode of electrospray ion source. The 10 active components had a good linear relationship, and the established method was stable, simple, and accurate. The 10 active components existed in different parts of L. chinensis, with significant different content. The main components in different parts of L. chinensis were polyphenols, with the highest content, followed by flavonoids. The content of 10 active components was generally high in flowers. Among them, the content of quinic acid was the highest, reaching 22.539 1 mg·g~(-1). This study elucidates the differences of active components in the same part and the different parts of L. chinensis, thereby providing basis for the research on the pharmacodynamic substances of L. chinensis and references for the comprehensive development and utilization of L. chinensis resources.

[Identification of chemical constituents of Xiaoer Chiqiao Qingre Granules based on UHPLC-LTQ-Orbitrap-MS/MS and network pharmacology analysis].

This study aimed to qualitatively analyze the chemical components in Xiaoer Chiqiao Qingre Granules(XRCQ) by UHPLC-LTQ-Orbitrap-MS/MS and identify its material basis. The absorbed components in plasma were combined for exploring the potential action mechanism by integrated network pharmacology. ACQUITY UPLC HSS T3(2.1 mm×100 mm, 1.8 µm) column and mobile phase system of 0.1% formic acid solution(A)-acetonitrile(B) were used for gradient elution, followed by high resolution liquid chromatography-mass spectrometry in both positive and negative ion scanning modes. According to the precise relative molecular mass and MS/MS fragment ions, a total of 124 chemical components were identified in XRCQ by the comparison with references and literature reports, among which 29 compounds were completely confirmed by comparison with reference substances. Then, the main absorbed components of XRCQ in plasma were also analyzed and clarified by UHPLC-LTQ-Orbitrap-MS/MS. BATMAN-TCM and SwissTargetPrediction were used for target prediction of absorbed components in plasma. Following the plotting of association network with Cytoscape 3.8.2, the core targets were subjected to GO and KEGG pathway enrichment analysis and a component-target-pathway network was constructed. A total of eight main targets of XRCQ against fever in children were obtained together with eight absorbed components in plasma, including glycyrhydinic acid, hesperidin, emodin, reticuline, daidzein, magnolignan C, magnolignan A, and magnolaldehyde D. It was inferred that XRCQ might improve alimentary system abnormality, inflammatory response, oxidative stress, and endocrine disorder through tumor necrosis factor, PI3 K-AKT, and other signaling pathways. The present study comprehensively expounded the chemical profiles of XRCQ and the main absorbed components in plasma and predicted the potential mechanism of XRCQ based on integrated network pharmacology, which has provided certain theoretical reference for the clinical application of XRCQ.

[Study on anti-inflammatory activity and mechanism of indolealkylamines in toad skin on LPS-activated neutrophils].

Indolealkylamines(IAAs) are the main hydrophilic substances in toad skin, mainly including free N-methyl-5-hydroxytryptamine, bufotenine, bufotenidine, dehydrobufotenine, and binding bufothionine. In this study, the LPS-activated neutrophils were used to investigate the structure-activity relationship and anti-inflammatory mechanism of the above-mentioned five monomers from the toad skin in vitro. The neutrophils were divided into the control group, model group(1 µg·mL~(-1) LPS), positive drug group(100 µg·mL~(-1) indometacin), as well as the low-(50 µg·mL~(-1)), medium-(100 µg·mL~(-1)) and high-dose(200 µg·mL~(-1)) free N-methyl-5-hydroxytryptamine, bufotenine, bufotenidine, dehydrobufotenine, and binding bufothionine groups. The levels of IL-6, TNF-α and IL-1ß in the neutrophil supernatant of each group was measured by enzyme-linked immunosorbent assay(ELISA) after LPS stimulation, followed by the detection of apoptosis in each group after Annexin V/PI staining. The protein expression levels of caspase-3, Bax, Bcl-2, beclin1, LC3-I, and LC3-Ⅱ were assayed by Western blot. The results showed that IAAs reduced the excessive secretion of inflammatory cytokines caused by LPS compared with the model group. Besides, the activity of each free IAAs(N-methyl-5-hydroxytryptamine, bufotenine, bufotenidine and dehydrobufotenine), especially bufotenine, was stronger than that of the binding bufothionine. As revealed by Annexin V/PI staining, LPS delayed the early apoptosis of neutrophils compared with the control group, while bufotenine promoted the apoptosis of neutrophils in a dose-dependent manner, which might be related to the elevated expression of apoptosis-related protein Bax/Bcl-2. In addition, LPS activated the autophagy pathways in neutrophils. This study confirmed the efficacy of IAAs in reducing the secretion of inflammatory cytokines in neutrophils induced by LPS for the first time. For instance, bufotenine exerts the anti-inflammatory effect possibly by inducing the apoptosis of neutrophils.

[Identification of Dredging Depths Based on Sediment Vertical Distribution Profiles of Total Nitrogen and Total Phosphorus and Their Adsorption-desorption Equilibria].

A dredging demonstration project in the Baiyangdian Lake included open waters and fishing ponds to reduce the internal release of nitrogen and phosphorus from bottom sediments. The dredging depth design was determined by both the sediment vertical distribution profile of total nitrogen and phosphorus, and the sediment adsorption-desorption equilibrium method. The determined dredging depths were very similar and coincident. The dredging depth for the demonstration area of open waters in Nanliuzhuang was identified as(50±10) cm; and the dredging depths for fishing ponds were(30±10) cm in both the Nanliuzhuang and Caiputai demonstration areas. The equilibrium nitrogen(NH4+-N) and phosphorus(SRP) concentrations at zero net sorption or desorption(ENC0 and EPC0) were significantly positively correlated with both exchangeable and total nitrogen and phosphorus in the sediments. The total nitrogen and phosphorus in the sediments were also used to predict the risk of their release from the bottom sediments to the overlying water column. The sediment layers with ENC0 and EPC0 values greater than the NH4+-N and SRP in the overlying water column indicated the sediments act as a source of dissolved nitrogen and phosphorus to the overlying water column in the Nanliuzhuang and Caiputai demonstration areas. Accordingly, the sediment layers with both total nitrogen concentrations greater than 750 mg·kg-1 and total phosphorus concentrations greater than 500 mg·kg-1 should be identified as dredging layers.

The integrated study on the chemical profiling and in vivo course to explore the bioactive constituents and potential targets of Chinese classical formula Qingxin Lianzi Yin Decoction by UHPLC-MS and network pharmacology approaches.

ETHNOPHARMACOLOGICAL RELEVANCE: Qingxin Lianzi Yin Decoction (QXLZY), a Chinese classical formula, has been widely used in the treatment of various chronic kidney diseases over 1,000 years. However, the current studies on QXLZY were mostly focused on its clinical efficacy, lacking systematic material basis research on constituents. AIM OF THE STUDY: This work aims to elucidate and quantify the chemical constituents, clarify the blood-absorbed components and excretion pathways, predict major bioactive constituents and discover potential therapeutic targets. MATERIALS AND METHODS: UHPLC-LTQ-Orbitrap HRMS was employed to clarify the chemical constituents and metabolites of QXLZY. The extraction of diagnostic ion and neutral loss fragment was aimed for searching specific type of constituents. The plasma, urine, bile and feces samples of rats after oral administration of QXLZY were systematically studied. UHPLC-QQQ-MS/MS was employed to simultaneously detect different types of constitutes. Based on the analysis of ingredients in vivo, the bioactive constituents and potential therapeutic targets in the treatment of diabetic nephropathy (DN) was investigated by using network pharmacological analysis. RESULTS: Totally, 220 compounds were identified or tentatively characterized by UHPLC-LTQ-Orbitrap HRMS. Among them, 59 compounds were confirmed by reference standards. Meanwhile, 21 representative components were simultaneously determined within 15 min by UHPLC-QQQ-MS/MS. 123 components (74 prototypes as well as 49 metabolites) were identified or tentatively characterized. By using network pharmacological analysis, baicalein, liquiritigenin, succinic acid, formononetin, wogonin might be the major effective constituents in QXLZY during the treatment of DN. CONCLUSIONS: Flavonoids, saponins and organic acids were the major chemical ingredients of QXLZY. Flavonoids were the main components absorbed into blood, followed by organic acids. Phase II conjugation reaction was the major metabolic type. The pathways that QXLZY in the treatment of DN were probably related to glucose and lipid metabolism, oxidative stress and inflammation.

[Identification and attribution of chemical constituents of Qingfei Paidu Decoction based on UHPLC-LTQ-Orbitrap-MS technology].

UHPLC-LTQ-Orbitrap-MS was developed for the identification of chemical constituents in Qingfei Paidu Decoction, which will clarify its material basis. ACQUITY UHPLC HSS T3 chromatography column(2.1 mm×100 mm, 1.8 µm) was used with 0.1% formic acid(B)-acetonitrile(A) as the mobile phase in gradient elution. The decoction was detected by high-resolution liquid chromatography-mass spectrometry equipped with an ESI ion source in positive and negative mode. Based on the accurate mass measurements, retention time, mass fragmentation patterns combined with comparison of reference and literature reports, a total of 87 major compounds including 43 flavonoids, 9 alkaloids, 4 triterpenoid saponins, 1 sesquiterpene, 2 coumarins, 10 phenolic acids and 18 other compounds were tentatively screened and characterized. UHPLC-LTQ-Orbitrap-MS was employed to comprehensively elucidate the chemical components in Qingfei Paidu Decoction, which basically covered 20 Chinese medicines except gypsum in Qingfei Paidu Decoction. These collective results provide a scientific basis for further research on the quality control standard of Qingfei Paidu Decoction.