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The malignancy of breast cancer poses a global challenge, with existing treatments often falling short of desired efficacy. Extensive research has underscored the effectiveness of targeting the metabolism of nicotinamide adenine dinucleotide (NAD), a pivotal molecule crucial for cancer cell survival and growth, as a promising anticancer strategy. Within mammalian cells, sustaining optimal NAD concentrations relies on two key enzymes, namely nicotinamide phosphoribosyltransferase (NAMPT) and poly(ADP-ribose) polymer 1 (PARP1). Recent studies have accentuated the potential benefits of combining NAMPT inhibitors and PARP1 inhibitors to enhance therapeutic outcomes, particularly in breast cancer. In this study, we designed and synthesized eleven novel NAMPT/PARP1 dual-target inhibitors. Among them, compound DDY02 exhibited acceptable inhibitory activities against both NAMPT and PARP1, with IC50 values of 0.01 and 0.05 µM, respectively. Moreover, in vitro evaluations revealed that treatment with DDY02 resulted in proliferation inhibition, NAD depletion, DNA damage, apoptosis, and migration inhibition in MDA-MB-468 cells. These results posit DDY02, by targeting NAD metabolism through inhibiting both NAMPT and PARP1, as a promising lead compound for the development of breast cancer therapy.
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Antineoplásicos , Neoplasias de la Mama , Proliferación Celular , NAD , Nicotinamida Fosforribosiltransferasa , Poli(ADP-Ribosa) Polimerasa-1 , Nicotinamida Fosforribosiltransferasa/antagonistas & inhibidores , Nicotinamida Fosforribosiltransferasa/metabolismo , Humanos , NAD/metabolismo , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Poli(ADP-Ribosa) Polimerasa-1/antagonistas & inhibidores , Poli(ADP-Ribosa) Polimerasa-1/metabolismo , Antineoplásicos/farmacología , Antineoplásicos/síntesis química , Antineoplásicos/química , Femenino , Proliferación Celular/efectos de los fármacos , Línea Celular Tumoral , Apoptosis/efectos de los fármacos , Diseño de Fármacos , Citocinas/metabolismo , Inhibidores Enzimáticos/farmacología , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/química , Inhibidores de Poli(ADP-Ribosa) Polimerasas/farmacología , Inhibidores de Poli(ADP-Ribosa) Polimerasas/síntesis química , Inhibidores de Poli(ADP-Ribosa) Polimerasas/química , Simulación del Acoplamiento MolecularRESUMEN
Superhydrophobic coatings with excellent self-cleaning performance have attracted significant concerns from researchers. Although various superhydrophobic coatings with prominent superhydrophobic properties have been fabricated, most developed coatings are still inadequate in pipeline scale inhibition applications. In this work, nano-silica (nano-SiO2) was modified by silane coupling of vinyltriethoxysilane (VETS) and 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFTS) to prepare a superhydrophobic coating. Organosilicon of PFTS and VETS was grafted onto the surface of SiO2 for preparing the superhydrophobic coating with low surface energy, and the superhydrophobic coating was cured via poly(vinylidene fluoride) (PVDF). The results showed that the contact angle of the prepared silica-based superhydrophobic coating, denoted as VETS-PFTS@SiO2/PVDF, is 159.2°, exhibiting outstanding superhydrophobicity performance. Furthermore, the superhydrophobicity coating also showed satisfactory durability performance in 200 g load wear test after 50 cycles. Importantly, the superhydrophobic coating displayed promising mechanical durability, chemical stability performance, as well as maintained excellent superhydrophobic properties after being placed in water for 3 weeks, indicating the potential for long-term utilization. In the simulated scale inhibition test, it was found that the synthesized coating can also significantly decrease the deposition rate of CaCO3 and successfully enhance its scale inhibition performance.
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Interacciones Hidrofóbicas e Hidrofílicas , Silanos , Dióxido de Silicio , Silanos/química , Dióxido de Silicio/químicaRESUMEN
Small molecules directly downregulating ß-catenin could potentially offer a more effective therapeutic approach for combating against cancer stem cells, as compared to targeting the downstream components of the Wnt/ß-catenin pathway. The challenge, however, lies in the fact that very few ß-catenin suppressors have proven clinically effective, leaving a significant gap in medical solutions. Given that E-cadherin has a natural affinity for ß-catenin, it stands to reason that agents designed to increase E-cadherin expression might provide an alternative method of regulating ß-catenin levels. In this study, we report our discovery of DSS-C12 and DSS-B8, specific ester-based drugs derived from Dan-Shen-Su (DSS) extracted from the herb Salvia miltiorrhiza. Remarkably, these compounds display a potent ability to downregulate ß-catenin, while also improving overall survival in post-surgery mice. Additionally, when these drugs are used in combination with PD-L1 checkpoint blockade, they stimulate enhanced systemic immune responses leading to significant suppression of primary tumor growth. In-depth mechanistic studies revealed that DSS-B8 functions as a vitamin D receptor agonist without inducing hypercalcemic effects. Collectively, our findings indicate that DSS-derived small molecules have considerable potential as clinically viable therapeutic strategies for ß-catenin deactivation.
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Nutrient recovery from wastewater not only reduces the nutrient load on water resources but also alleviates the environmental problems in aquatic ecosystems, which is a solution to achieve a sustainable society. Besides, struvite crystallization technology is considered a potential nutrient recovery technology because the precipitate obtained can be reused as a slow-release fertilizer. This review presents the basic properties of struvite and the theory of the basic crystallization process. In addition, the possible influencing variables of the struvite crystallization process on the recovery efficiency and product purity are also examined in detail. Then, the advanced auxiliary technologies for facilitating the struvite crystallization process are systematically discussed. Moreover, the economic and environmental benefits of the struvite crystallization process for nutrient recovery are introduced. Finally, the shortcomings and inadequacies of struvite crystallization technology are presented, and future research prospects are provided. This work serves as the foundation for the future use of struvite crystallization technology to recover nutrients in response to the increasingly serious environmental problems and resource depletion.
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Fosfatos , Aguas Residuales , Estruvita/química , Fósforo/química , Cristalización , Ecosistema , Nutrientes , Eliminación de Residuos LíquidosRESUMEN
Both hereditary and sporadic breast cancer are suggested to develop from a stem cell subcomponent retaining most key stem cell properties but with dysregulation of self-renewal pathways, which drives tumorigenic differentiation and cellular heterogeneity. Cancer stem cells (CSCs), characterized by their self-renewal and differentiation potential, have been reported to contribute to chemo-/radio-resistance and tumor initiation and to be the main reason for the failure of current therapies in breast cancer and other CSC-bearing cancers. Thus, CSC-targeted therapies, such as those inducing CSC apoptosis and differentiation, inhibiting CSC self-renewal and division, and targeting the CSC niche to combat CSC activity, are needed and may become an important component of multimodal treatment. To date, the understanding of breast cancer has been extended by advances in CSC biology, providing more accurate prognostic and predictive information upon diagnosis. Recent improvements have enhanced the prospect of targeting breast cancer stem cells (BCSCs), which has shown promise for increasing the breast cancer remission rate. However, targeted therapy for breast cancer remains challenging due to tumor heterogeneity. One major challenge is determining the CSC properties that can be exploited as therapeutic targets. Another challenge is identifying suitable BCSC biomarkers to assess the efficacy of novel BCSC-targeted therapies. This review focuses mainly on the characteristics of BCSCs and the roles of BCSCs in the formation, maintenance and recurrence of breast cancer; self-renewal signaling pathways in BCSCs; the BCSC microenvironment; potential therapeutic targets related to BCSCs; and current therapies and clinical trials targeting BCSCs.
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Neoplasias de la Mama/terapia , Células Madre Neoplásicas , Animales , Antineoplásicos/uso terapéutico , Neoplasias de la Mama/genética , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Diferenciación Celular/efectos de los fármacos , Daño del ADN , Femenino , Humanos , Inmunoterapia , Proteínas de Transporte de Membrana/metabolismo , Terapia Molecular Dirigida , Células Madre Neoplásicas/efectos de los fármacos , ARN no Traducido , Microambiente Tumoral/efectos de los fármacosRESUMEN
Breast cancer, the most prevalent malignant tumor among women globally, is significantly influenced by the Wnt/ß-catenin signaling pathway, which plays a crucial role in its initiation and progression. While conventional chemotherapy, the standard clinical treatment, suffers from significant drawbacks like severe side effects, high toxicity, and limited prognostic efficacy, Traditional Chinese Medicine (TCM) provides a promising alternative. TCM employs a multi-targeted therapeutic approach, which results in fewer side effects and offers a high potential for effective treatment. This paper presents a detailed analysis of the therapeutic impacts of TCM on various subtypes of breast cancer, focusing on its interaction with the Wnt/ß-catenin signaling pathway. Additionally, it explores the effectiveness of both monomeric and compound forms of TCM in the management of breast cancer. We also discuss the potential of establishing biomarkers for breast cancer treatment based on key proteins within the Wnt/ß-catenin signaling pathway. Our aim is to offer new insights into the prevention and treatment of breast cancer and to contribute to the standardization of TCM.
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The oral delivery of doxorubicin (DOX), an anti-cancer drug, encounters multiple hurdles such as limited gastrointestinal permeability, P-glycoprotein-mediated efflux, brief intestinal residence, and rapid degradation. This study introduced a novel approach utilizing hyaluronic acid (HA)-grafted fatty acid monoglycerides (HGD) to encapsulate DOX, forming HGD-DOX nanoparticles, aimed at enhancing its oral bioavailability. Drug encapsulated by HGD provided several advantages, including extended drug retention in the gastrointestinal tract, controlled release kinetics, and promotion of lymphatic absorption in the intestine. Additionally, HGD-DOX nanoparticles could specifically target CD44 receptors, potentially increasing therapeutic efficacy. The uptake mechanism of HGD-DOX nanoparticles primarily involved clathrin-mediated, caveolin-mediated and macropinocytosis endocytosis. Pharmacokinetic analysis further revealed that HGD significantly prolonged the in vivo residence time of DOX. In vivo imaging and pharmacodynamic studies indicated that HGD possessed tumor-targeting capabilities and exhibited a significant inhibitory effect on tumor growth, while maintaining an acceptable safety profile. Collectively, these findings position HGD-DOX nanoparticles as a promising strategy to boost the oral bioavailability of DOX, offering a potential avenue for improved cancer treatment.
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Doxorrubicina , Receptores de Hialuranos , Ácido Hialurónico , Nanopartículas , Doxorrubicina/administración & dosificación , Doxorrubicina/química , Doxorrubicina/farmacocinética , Doxorrubicina/farmacología , Ácido Hialurónico/química , Animales , Nanopartículas/química , Receptores de Hialuranos/metabolismo , Humanos , Administración Oral , Ratones , Portadores de Fármacos/química , Línea Celular Tumoral , Sistemas de Liberación de Medicamentos , Ensayos Antitumor por Modelo de XenoinjertoRESUMEN
A new component for the solid phase peptide synthesis of lipopeptide, 2-[(4R,5R)-5-({[(9H-fluoren-9-yl)methoxy]carbonylaminomethyl}-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy]acetic acid (2), was designed and synthesized from (-)-2,3-O-isopropylidene-D-threitol (3) in 4 steps. The key step was the selective alkylation of 3 with benzyl bromoacetate in the presence of Cs2CO3. Vasoactive intestinal peptide (VIP)-lipopeptide (1) incorporating this linker was synthesized by solid phase peptide synthesis.
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Dioxolanos/síntesis química , Portadores de Fármacos/química , Liposomas/química , Péptido Intestinal Vasoactivo/síntesis química , Acetatos/química , Alquilación , Carbonatos/química , Cesio/química , Dioxolanos/química , Técnicas de Síntesis en Fase Sólida , Péptido Intestinal Vasoactivo/químicaRESUMEN
BRD4 inhibitors have demonstrated promising potential in cancer therapy. However, their therapeutic efficacy in breast cancer varies depending on the breast cancer subtype, particularly in the treatment of TNBC. In this study, we designed and synthesized 94 derivatives of 4-(3-(3,5-dimethylisoxazol-4-yl)benzyl)phthalazin-1(2H)-one to evaluate their inhibitory activities against BRD4. Notably, compound DDT26 exhibited the most potent inhibitory effect on BRD4, with an IC50 value of 0.237 ± 0.093 µM. DDT26 demonstrated significant anti-proliferative activity against both TNBC cell lines and MCF-7 cells. Intriguingly, the phthalazinone moiety of DDT26 mimicked the PAPR1 substrate, resulting in DDT26 displaying a moderate inhibitory effect on PARP1 with an IC50 value of 4.289 ± 1.807 µM. Further, DDT26 was shown to modulate the expression of c-MYC and γ-H2AX, induce DNA damage, inhibit cell migration and colony formation, and arrest the cell cycle at the G1 phase in MCF-7 cells. Our findings present potential lead compounds for the development of potent anti-breast cancer agents targeting BRD4.
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Background: Black plaster is one of the classic dosage forms of traditional Chinese medicine for external use and has been widely utilized since the Tang and Song Dynasties. In this paper, we take Goupi Gao as the research object and discuss the scientific characteristics of the black plaster dosage form. Goupi Gao ointment is a plaster for external use of traditional Chinese medicine. Methods: Methods for the morphological and quantitative characterization of black plaster's microstructure, based on FESEM-IPP (Field Emission Scanning Electron Microscope IPP Image Processing) technology, were established. According to the actual operating temperature of Goupi Gao, three temperatures were selected: 28°C, 35°C, and 45°C. A UPLC analysis method was applied to the cinnamaldehyde and eugenol in Goupi Gao, and the release behavior of Goupi Gao from three samples at three temperatures was investigated using the paddle over disk method. Preparation of rabbit model of knee osteoarthritis of cold blood stasis type by cold stimulation combined with drug induction. Results: In terms of morphology, Goupi Gao and the blank black plaster matrix both formed a double continuous phase system with a thicker vegetable oil phase and crossed "branched" soap crystal fibers. Based on the IPP image quantification parameters, the pore area (A) was highly positively correlated with temperature. After the 28 °C treatment, A1 = (216.8±59.5) µm2; after the 35 °C treatment, A2 = (259.7±52.8) µm2; after the 45 °C treatment, A3 = (408.0±57.7) µm2, and there were no significant differences in other pore parameters. Conclusion: The black plaster matrix's unique structure makes it highly applicable in numerous medications; it exhibits slow-release and performs well in extreme temperatures, with good adhesion and peeling properties.
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Calor , Medicina Tradicional China , Animales , Conejos , TemperaturaRESUMEN
PARP1 is a hot target, and its inhibitors have been approved for cancer therapy. However, some undesirable properties restrict the application of PARP1 inhibitors, including drug resistance, side effects and low efficiency. For multifactorial diseases, dual-target drugs have exhibited excellent synergistic effects, such as reduced drug resistance, low side effects and high therapeutic efficacy, by simultaneously regulating the main pathogenic and compensatory signal pathways of diseases. In recent years, several dual-target inhibitors based on PARP1 have been reported and have demonstrated unique advantages. In this review we summarize the research progress in dual-target inhibitors based on PARP1 and discuss the related drug design strategies and structure-activity relationships. This work is expected to provide references for the development of PARP1 inhibitors.
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Diseño de Fármacos , Relación Estructura-ActividadRESUMEN
Hydroxysteroid dehydrogenases (HSDs) play an important role in the metabolism of steroids and xenobiotics. However, the function of HSDs in invertebrates is unclear. In this study, we cloned the hydroxysteroid dehydrogenase-like 2 (HSDL2) gene in Perinereis aibuhitensis, which is 1652 bp in length, encoding 400 amino acids. This sequence contains conserved short-chain dehydrogenase and sterol carrier protein-2 domain, and the alignment analysis showed its close relationship with other invertebrate HSDL2. Further, the tissue distribution analysis of the HSDL2 gene showed it is expressed strongly in the intestine. The expression level of HSDL2 after inducement with bisphenol A (BPA) was also detected both at transcriptional and translational levels. The results inferred that BPA exposure can induce HSDL2 expression, and the inductive effect was obvious in the high-concentration BPA group (100 µg/L). In summary, our results showed the detoxification function of HSDL2 in polychaetes.
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Compared to normal cells, cancer cells generate ATP mainly through aerobic glycolysis, which promotes tumorigenesis and tumor progression. Long non-coding RNAs (LncRNAs) are a class of transcripts longer than 200 nucleotides with little or without evident protein-encoding function. LncRNAs are involved in the ten hallmarks of cancer, interestingly, they are also closely associated with aerobic glycolysis. However, the mechanism of this process is non-transparent to date. Demonstrating the mechanism of lncRNAs regulating tumorigenesis and tumor progression through aerobic glycolysis is particularly critical for cancer therapy, and may provide novel therapeutic targets or strategies in cancer treatment. In this review, we discuss the role of lncRNAs and aerobic glycolysis in tumorigenesis and tumor progression, and further explore their interaction, in hope to provide a novel therapeutic target for cancer treatment.
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Triple-negative breast cancer (TNBC) has been listed as one of the most fatal diseases, and no effective targeting treatment is clinically available. Although CD44-targeting hyaluronic acid (HA) has been utilized as targeting ligands in many studies, no facile ways have been developed through HA self-assembly at the nanoparticle surface. Herein, we reported N-isopropylacrylamide-grafted chitosan-based nanoparticles self-assembling with HA (HA-NPs) through electrostatic forces and loaded with curcumin (CUR). The HA-NPs displayed pH-responsive properties due to the chemical modification of chitosan, and the preparation process was optimized by central composite design-response surface methodology. HA anchorage confers the vehicle with tumor-targeting capability. HA-NPs displayed more robust effects of inhibiting TNBC primary tumor growth than free CUR and a plain counterpart but without increased systemic cytotoxicity. In addition, in vivo pharmacokinetic studies showed that HA-NPs significantly increased the in vivo residence time of free CUR and improved the bioavailability of CUR. These findings suggested that chitosan-based HA-NPs may provide a feasible and unique strategy to achieve CD44 targeting and enhance its efficacy in vivo for the treatment of advanced TNBC.
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Recycling critical metals from spent Li-ion batteries (LIBs) is important for the overall sustainability of future batteries. This study reports an improved sulfation roasting technology to efficiently recycle Li and Co from spent LiCoO2 LIBs using potassium pyrosulfate as sulfurizing reagent. By sulfation roasting, LiCoO2 was converted into water-soluble lithium potassium sulfate and water-insoluble cobalt oxide. Under optimal conditions, 98.51% Li was leached in water, with a selectivity of 99.86%. More importantly, sulfur can be recirculated thoroughly, and the sulfur atomic efficiency can be significantly enhanced by controlling the amount of potassium pyrosulfate. Li ions from the water leaching process were recovered by chemical precipitation. Furthermore, application of this technology to other spent LIBs, such as LiMn2O4 and LiNi0.5Co0.2Mn0.3O2, verified its effectiveness for selective recovery Li. These findings can provide some inspiration for high efficiency and environmentally friendly recovery metal from spent LIBs.
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The purpose of this study is to find that a small amount of 2-Hydroxypropyl-ß-cyclodextrin (HP-ß-CD) can produce a parachute effect on indomethacin (INM). From the examination of dissolution curves and concentration after several days, the supersaturation of INM was observed for the mixtures containing HP-ß-CD at a molar ratio ≤ 0.5, and the sustained deployment of supersaturation was found not only in equimolar mixtures but also in mixtures with a shortage of HP-ß-CD. In the solid state, it was compared the physical properties of INM/HP-ß-CD mixtures using two different mixing methods and determined the stoichiometry of INM and HP-ß-CD. Differential scanning calorimetry (DSC) revealed that the polymorphs of INM were converted by HP-ß-CD into an amorphous state. Furthermore, X-ray powder diffraction (XRPD) and DSC-XRPD demonstrated that INM crystals from the INM/HP-ß-CD mixture prepared from an EtOH solution were metastable. In conclusion, these phenomena may be considered the "spring" and "parachute" effects of mixtures with a shortage of HP-ß-CD, as they depended on the presence of the metastable α-form of INM. The addition of 1/3 to 1/20 equivalents of HP-ß-CD to INM enhanced INM solubility.
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Indometacina , beta-Ciclodextrinas , 2-Hidroxipropil-beta-Ciclodextrina , Rastreo Diferencial de Calorimetría , SolubilidadRESUMEN
Hovenia acerba Lindl. is an important medicinal plant, for which complete chloroplast genome (Accession: MN782301) was sequenced, assembled and annotated. The genome size is 161,668 bp and the overall GC content is 36.69%, with large single-copy (LSC, 89,451bp) regions, small single-copy (SSC, 18,979 bp) regions, and two inverted repeat regions (IRs, 26,619 bp each). A total of 130 genes are successfully annotated, including 85 protein-coding genes, 37 tRNA genes, and 8 rRNA genes. The phylogenetic relationships showed that H. acerba is closely related to the species of Ziziphus genus.
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Cyclodextrins (CDs) form complex crystals with drugs and improve physicochemical properties of drugs. However, only few reports have summarized relationships between crystal structures of drug/CD and dissolution behavior. In this study, we developed cimetidine (CIM)/CD complex crystals to achieve sustained drug release and investigated the relationship between the dissolution behavior of CIM/CD complexes and their crystal structures. CIM and 3 types of CDs (α-, ß-, and γ-CD) formed a complex crystal when subjected to solvent mixing. The CIM/CD complexes had a highly reduced dissolution rate compared to that of the physical mixture of CIM and CD. ß-CD improved the solubility of CIM, whereas γ-CD decreased its solubility. Based on the phase solubility diagram, CIM and α-, ß-, and γ-CD indicated A-type positive (AP) and AL deviation, and B-type limited solubility (BS) profiles, respectively. In γ-CD, the saturated concentration of CIM decreased owing to the formation of a low-solubility complex with CIM. CIM/α-CD formed cage-type crystals, and CIM/ß-CD and CIM/γ-CD formed channel-type crystals. The dissolution rate constant (k) of CIM/α-CD and CIM/ß-CD were 0.045 and 0.04 h-1, respectively. CIM/γ-CD and CIM/ß-CD displayed channel-type crystals; however, the channel-type crystals of CIM/γ-CD were stabilized by the presence of additional water molecules.
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Ciclodextrinas , Preparaciones Farmacéuticas , Cimetidina , SolubilidadRESUMEN
High-throughput lipidomics provides the possibility for the development of new therapeutic drugs. Accordingly, herein, we reveal the protective role of salvianolic acid B (Sal B) in rats with coronary heart disease (CHD) and propose a new mechanism for its action through a high-throughput and non-targeted lipidomics strategy. A CHD animal model was induced by consecutive high-fat diet feeding with vitamin D3 injection. At the end of the 8th week, the serum sample was analyzed to explore the metabolic biomarker and pathway changes using untargeted lipidomics based on ultra-performance liquid chromatography with mass spectrometry (UPLC/MS). In addition, blood and heart tissue samples were collected and processed for the detection of biochemical indicators and liver histological observation. After salvianolic acid B treatment, the levels of LDH, CK, CK-MB, MYO, CTn1, TG, TC, LDL-c, and Apo(b) were significantly lower than that in the model group, while the levels of HDL-c and Apo(a1) were significantly higher than that in the model group. Furthermore, the histological features of fibrosis and steatosis were also evidently relieved in the model group. A total of twenty-six potential biomarkers were identified to express the lipid metabolic turbulence in the CHD animal models, of which twenty-two were regulated by salvianolic acid B trending to the normal state, including TG(20:0/20:4/o-18:0), PC(20:4/18:1(9Z)), PC(18:3/20:2), PA(18:0/18:2), LysoPE(18:2/0:0), SM(d18:0/22:1), PE(22:6/0:0), LysoPE (20:4/0:0), sphinganine, Cer(d18:0/18:0), PS(14:0/14:1), PC (18:0/16:0), LysoPC(17:0), PE(22:2/20:1), PC(20:3/20:4), PE(20:4/P-16:0), PS(20:3/18:0), cholesterol sulfate, TG(15:0/22:6/18:1), prostaglandin E2, arachidonic acid and sphingosine-1-phosphate. According to the metabolite enrichment and pathway analyses, the pharmacological activity of salvianolic acid B on CHD is mainly involved in three vital metabolic pathways including glycerophospholipid metabolism, sphingolipid metabolism and arachidonic acid metabolism. Thus, based on the lipidomics-guided biochemical analysis of the lipid biomarkers and pathways, Sal B protects against CHD with good therapeutic effect by regulating glycerophospholipid metabolism, sphingolipid metabolism and arachidonic acid metabolism, inhibiting oxidative stress damage and lipid peroxidation.
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BACKGROUND: Bai-Hu-Tang (BHT), a Chinese herbal decoction used as an antipyretic agent, results from the combination of Anemarrhena asphodeloides Bunge, Glycyrrhizae, Japonica rice, and Gypsum. In our previous study, we identified nanoaggregates in BHT. However, the present study aimed to analyze and elucidate the mechanism of nanoaggregate formation and to investigate its antipyretic effect. METHODS: A BHT decoction extract was split into 15 groups, and in each group, the extract was further separated into two solutions: Nano-phase and Decoction. The physicochemical properties of these solutions, such as particle size, salinity, conductivity, and surface tension were investigated, and analyzed the 15 groups of by transmission electron microscopy (TEM) and fingerprint chromatography. Furthermore, the antipyretic effect of nanoaggregates was evaluated through enzyme-linked immunosorbent assays, HE staining, Western Blot, and Real-time PCR. RESULTS: In the 15 groups, the salinity and conductivity results showed a promoting and stabilizing effect towards the Nano-phase formation. Analysis of the surface tension indicated good solubilization of Radix Glycyrrhizae. The TEM analysis of the BHT separated extracts revealed that only in the presence of Japonica rice the Nano-phase is formed. Sixteen common peaks were identified in the BHT fingerprint chromatogram, and the main chemical components were Neomangiferin, Mangiferin, Liquiritin, and Ammonium glycyrrhizinate. Furthermore, BHT and nanoaggregates from Bai-Hu-Tang (N-BHT) groups did not differ in the main chemical components. Additionally, the N-BHT group had the same antipyretic effect compared with the BHT group. However, the pathological analysis indicated that treatment with N-BHT could ameliorate the lung damage in the rat. At the same time, N-BHT group inhibited expression of several proteins, specifically IL-1ß, TRPV4, NF-κB, and TNF-α, which agreed with the Real-time PCR results. CONCLUSION: We identified the key factors that are involved in the nano-phase formation. Also, by Western blot and Real-time PCR methods, we investigated the N-BHT mechanism of antipyretic action. The discovery of the N-BHT formation would provide a new idea of studying traditional Chinese medicine decoction.