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Corn silk tea has been used in folk medicine for anti-hypertensive healthcare. Angiotensin-converting enzyme (ACE) plays a crucial role on the homeostasis of blood pressure. However, effects of corn silk tea on ACE activity and the presence of ACE inhibitory constituents in corn silk are still unknown. Here we applied proteomics and bioinformatics approaches to identify corn silk bioactive peptides (CSBps) that target ACE from the boiling water extract of corn silk (CSE). CSE significantly reduced systolic blood pressure (SBP) levels in spontaneously hypertensive rats and inhibited the ACE activity. By proteomics coupled with bioinformatics analyses, we identified a novel ACE inhibitory peptide CSBp5 in CSE. CSBp5 significantly inhibited the ACE activity and decreased SBP levels in a dose-dependent manner. Docking analysis showed that CSBp5 occupied the substrate-binding channel of ACE and interacted with ACE via hydrogen bonds. In conclusion, we identified that CSE exhibited anti-hypertensive effects in SHRs via the inhibition of ACE, the target of most anti-hypertensive drugs. In addition, an ACE inhibitory phytopeptide CSBp5 that decreased SBP levels in rats was newly identified. Our findings supported the ethnomedical use of corn silk tea on hypertension. Moreover, the identification of ACE inhibitory phytopeptide in corn silk further strengthened our findings.

Chronic inflammation-driven colorectal cancer (CRC) is critically mediated by interleukin-17A (IL-17A)-dependent immune responses and nuclear factor-κB (NF-κB) signaling, which promote immune cell infiltration and tumor progression. In this study, the anti-tumor efficacy and molecular mechanisms of a standardized extract of Hedyotis diffusa Willd. (HD) and its constituent, ferulic acid (FA), were investigated using an azoxymethane/dextran sulfate sodium (AOM/DSS)-induced colitis-associated CRC mouse model. HD and FA treatment markedly alleviated colitis, reduced tumor number and size, improved survival, and attenuated histopathological damage. Transcriptomic analysis revealed significant modulation of immune-related pathways, with prominent suppression of IL-17A and NF-κB signaling. Molecular docking demonstrated binding of FA to IL-17A at Pro59 and Arg101, suggesting potential disruption of the IL-17A/IL-17RA interaction. Consistently, both HD and FA reduced immune cell infiltration, downregulated IL-17A production, and inhibited NF-κB activation in colonic tissues. Collectively, these findings demonstrated that HD exerted protective effects against inflammation-associated CRC through targeting the IL-17A/IL-17RA axis and downstream NF-κB signaling, providing mechanistic insight into IL-17A-centered immunomodulation in colorectal tumorigenesis.

Background/Objectives: Metabolic dysfunction-associated steatotic liver disease (MASLD) is the most prevalent chronic liver disease worldwide, contributing to metabolic dysfunction and increased healthcare costs. The green Mediterranean diet reduces intrahepatic fat and elevates the plasma levels of 2,5-dihydroxybenzoic acid (2,5-DHBA), suggesting a mechanistic role for 2,5-DHBA in hepatic lipid metabolism. This study aimed to evaluate the therapeutic potential of 2,5-DHBA in MASLD and elucidate its molecular mechanism. Methods: Lipid accumulation was assessed in oleic acid-treated HepG2 cells and a high-fat diet (HFD)-induced MASLD mouse model. RNA sequencing, molecular docking, and immunohistochemical staining were performed to investigate the molecular mechanisms, focusing on the chemokine (C-C motif) ligand 2 (CCL2)–CCL2 receptor (CCR2) axis. Results: 2,5-DHBA significantly reduced hepatic lipid accumulation in both HepG2 cells and HFD-fed mice in a dose-dependent manner. RNA sequencing revealed the marked downregulation of CCL2, a key proinflammatory mediator in MASLD pathogenesis. Molecular docking predicted that 2,5-DHBA competed with CCL2 for binding at the CCR2 axis. Immunohistochemistry further confirmed that 2,5-DHBA treatment lowered hepatic CCL2 expression, suppressed nuclear factor-κB activation, and reduced inflammatory cell infiltration. These findings suggest that 2,5-DHBA exerted anti-steatotic effects by modulating the CCL2-CCR2 signaling pathway. Conclusions: This is the first study to demonstrate that 2,5-DHBA attenuates hepatic steatosis via targeting the CCL2-CCR2 axis. These findings highlight its potential as a novel nutraceutical strategy for MASLD treatment.

Clove ( ) is traditionally used for inflammatory skin disorders; however, its specific molecular mechanisms in psoriasis remain poorly defined. This study aimed to evaluate the efficacy of clove extract and its major component, eugenol, and to identify their molecular targets. We used an imiquimod (IMQ)-induced mouse model to assess the effects of oral clove extract and eugenol. Proteomic alterations were identified via isobaric tags for relative and absolute quantitation-based liquid chromatography-tandem mass spectrometry and bioinformatics. The specific interaction with the interleukin-17A (IL-17A)/IL-17 receptor A (IL-17RA) interface was validated through competitive binding assays and molecular docking, with further confirmation via immunohistochemistry. Eugenol was identified as the major constituent of clove extract (65.8%). Clove extract and eugenol significantly alleviated psoriasiform lesions, reducing scaling scores and epidermal thickness. Proteomic analysis revealed that both treatments reversed IMQ-induced inflammatory signatures by modulating the interleukin-36 (IL-36) and IL-17 signaling pathways, specifically increasing IL-36 receptor antagonist expression while suppressing IL-36 levels. assays demonstrated that both treatments inhibited IL-17A-IL-17RA binding in a dose-dependent manner, supported by molecular docking indicating potential interactions between eugenol and IL-17A residues. Immunohistochemical analysis further confirmed reduced nuclear factor-κB (NF-κB) activation, decreased IL-17A expression, and diminished CD11b granulocyte infiltration in psoriatic skin. Clove extract and its major bioactive constituent eugenol exert significant anti-psoriatic effects through coordinated modulation of the IL-36/IL-17A inflammatory axis and suppression of NF-κB signaling. These findings provide mechanistic insight into the traditional use of clove in inflammatory skin disorders and highlight eugenol as a key bioactive mediator with potential as a complementary therapeutic strategy for psoriasis.

5-Fluorouracil (5-FU) is a commonly used drug for the treatment of malignant cancers. However, approximately 80% of patients undergoing 5-FU treatment suffer from gastrointestinal mucositis. The aim of this report was to identify the drug target for the 5-FU-induced intestinal mucositis. 5-FU-induced intestinal mucositis was established by intraperitoneally administering mice with 100 mg/kg 5-FU. Network analysis of gene expression profile and bioluminescent imaging were applied to identify the critical molecule associated with 5-FU-induced mucositis. Our data showed that 5-FU induced inflammation in the small intestine, characterized by the increased intestinal wall thickness and crypt length, the decreased villus height, and the increased myeloperoxidase activity in tissues and proinflammatory cytokine production in sera. Network analysis of 5-FU-affected genes by transcriptomic tool showed that the expression of genes was regulated by nuclear factor-κB (NF-κB), and NF-κB was the central molecule in the 5-FU-regulated biological network. NF-κB activity was activated by 5-FU in the intestine, which was judged by in vivo bioluminescence imaging and immunohistochemical staining. However, 5-aminosalicylic acid (5-ASA) inhibited 5-FU-induced NF-κB activation and proinflammatory cytokine production. Moreover, 5-FU-induced histological changes were improved by 5-ASA. In conclusion, our findings suggested that NF-κB was the critical molecule associated with the pathogenesis of 5-FU-induced mucositis, and inhibition of NF-κB activity ameliorated the mucosal damage caused by 5-FU.

Agarwood, the resinous wood in the heartwood of Aquilaria trees, has been used as incense in traditional Chinese medicine for its sedative, aphrodisiac, carminative, and anti-emetic effects. Grading of agarwood is usually based on its physical properties. Therefore, it is important to develop analytic methods for judgment and grading of agarwood. Here, we created a headspace (HS) preheating system that is combined with gas chromatography-mass spectrometry (HS GC-MS) to analyze the chemical constituents in the incense smoke produced by agarwood. Incense smoke generated in the HS preheating system was injected directly to GC-MS for analysis. A total of 40 compounds were identified in the incense smoke produced by Kynam agarwood, the best agarwood in the world. About half of the compounds are aromatics and sesquiterpenes. By analyzing chemical constituents in the incense smoke produced by Vietnamese, Lao, and Cambodian varieties of agarwood, we found that butyl hexadecanoate, butyl octadecanoate, bis(2-ethylhexyl) 1,2-benzenedicarboxylate, and squalene were common in the aforementioned four varieties of agarwoods. 2-(2-Phenylethyl) chromone derivatives were identified only in the incense smoke produced by Kynam agarwood, and were the major ingredient (27.23%) in the same. In conclusion, this is the first study that analyzes chemical profiles of incense smoke produced by agarwood using HS GC-MS. Our data showed that 2-(2-phenylethyl) chromone derivatives could be used to assess quality of agarwoods. Moreover, HS GC/MS may be a useful tool for grading quality of agarwood.

Chemotherapy plays an important role in current cancer therapy; however, several problems remain unsolved on the issue of host-therapeutics interaction. The purpose of this study was to investigate the host responses after 5-flurouracil (5-FU) administration and to find the target genes and their relationship with other cytokines in the 5-FU-induced oral mucositis (OM) mouse model through transcriptomic analysis. Thirty-six 6 to 8 week-old male BALB/c mice were randomly divided into the control group and 5-FU-treated group. In the 5-FU group, mice received 5-FU (100 mg/kg, intraperitoneally) on day 1, day 8, day 15, day 22, and day 29, respectively. We evaluated the oral mucosal change under macroanalysis and histological examination at indicated periods, and then applied transcriptomic analysis of gene expression profile and Immunohistochemical stain to identify the target molecules related to 5-FU-induced OM. The most prominent histological change in this model was observed in the fifth week. The gene expression of Bone gamma-carboxyglutamate protein, related sequence 1 (Bglap-rs1) (-12.69-fold) and Chitinase 3-like 4 (Chi3l4) (-6.35-fold) were significantly down-regulated in this phase. The quantitative real-time PCR results also revealed the expression levels were 0.62-fold in Bglap-rs1 and 0.13-fold in Chi3l4 compared with the control group. Immunohistochemical stain showed significant expression of cluster of differentiation 11b (p<0.01), interleukin-1β (p<0.001) and tumor necrosis factor-α (p<0.05), and down-regulation of Bglap-rs1 (p<0.01) compared with the control group. By Kyoto Encyclopedia of Genes and Genomes pathway analysis, there were twenty-three pathways significantly participated in this study (p<0.05). Through comprehensively transcriptomic analysis and IHC stain, we discovered several valuable pathways, verified the main pro-inflammatory cytokines, and revealed two significantly down-regulated genes in the 5-FU-induced OM model. These findings highlighted the way of seeking effective therapeutic agents for chemotherapy-induced OM in future.

Deer antler is a well-known traditional Chinese medicine used in Asian countries for the tonic and the improvement of aging symptoms. The present study was designed to investigate the antifatigue effect and mechanism of Formosan sambar deer tip antler extract (FSDTAE). The swimming times to exhaustion of mice administered FSDTAE (8.2 mg/day) for 28 days were apparently longer than those of the vehicle-treated mice in forced swim test. However, the indicators of fatigue, such as the reduction in glucose level and the increases in blood urea nitrogen and lactic acid levels, were not significantly inhibited by FSDTAE. Therefore, microarray analysis was further used to examine the anti-fatigue mechanism of FSDTAE. We selected genes with fold changes >2 or <−2 in skeletal muscle for pathway analysis. FSDTAE-affected genes were involved in 9 different signaling pathways, such as GnRH signaling pathway and insulin signaling pathway. All of the significantly expressed genes were classified into 8 different categories by their functions. The most enriched category was muscular system, and 6 upregulated genes, such as troponin I, troponin T1, cysteine and glycine-rich protein 2, myosin heavy polypeptide 7, tropomyosin 2, and myomesin family member 3, were responsible for the development and contraction of muscle. Real-time PCR analysis indicated that FSDTAE increased troponins mRNA expression in skeletal muscle. In conclusion, our findings suggested that FSDTAE might increase the muscle strength through the upregulation of genes responsible for muscle contraction and consequently exhibited the anti-fatigue effect in mice.

Chitosan has been widely used in food industry as a weight-loss aid and a cholesterol-lowering agent. Previous studies have shown that chitosan affects metabolic responses and contributes to anti-diabetic, hypocholesteremic, and blood glucose-lowering effects; however, the in vivo targeting sites and mechanisms of chitosan remain to be clarified. In this study, we constructed transgenic mice, which carried the luciferase genes driven by peroxisome proliferator-activated receptor (PPAR), a key regulator of fatty acid and glucose metabolism. Bioluminescent imaging of PPAR transgenic mice was applied to report the organs that chitosan acted on, and gene expression profiles of chitosan-targeted organs were further analyzed to elucidate the mechanisms of chitosan. Bioluminescent imaging showed that constitutive PPAR activities were detected in brain and gastrointestinal tract. Administration of chitosan significantly activated the PPAR activities in brain and stomach. Microarray analysis of brain and stomach showed that several pathways involved in lipid and glucose metabolism were regulated by chitosan. Moreover, the expression levels of metabolism-associated genes like apolipoprotein B (apoB) and ghrelin genes were down-regulated by chitosan. In conclusion, these findings suggested the feasibility of PPAR bioluminescent imaging-guided transcriptomic analysis on the evaluation of chitosan-affected metabolic responses in vivo. Moreover, we newly identified that downregulated expression of apoB and ghrelin genes were novel mechanisms for chitosan-affected metabolic responses in vivo.

Diabetes is a chronic metabolic disorder that has a significant impact on the health care system. The reduction of glycated hemoglobin A1c is highly associated with the improvements of glycemic control and diabetic complications. In this study, we identified a traditional Chinese medicinal formula with a HbA1c-lowering potential from clinical evidences. By surveying 9,973 diabetic patients enrolled in Taiwan Diabetic Care Management Program, we found that Chu-Yeh-Shih-Kao-Tang (CYSKT) significantly reduced HbA1c values in diabetic patients. CYSKT reduced the levels of HbA1c and fasting blood glucose, and stimulated the blood glucose clearance in type 2 diabetic mice. CYSKT affected the expressions of genes associated with insulin signaling pathway, increased the amount of phosphorylated insulin receptor in cells and tissues, and stimulated the translocation of glucose transporter 4. Moreover, CYSKT affected the expressions of genes related to diabetic complications, improved the levels of renal function indexes, and increased the survival rate of diabetic mice. In conclusion, this was a translational medicine study that applied a \"bedside-to-bench\" approach to identify a novel HbA1c-lowering formula. Our findings suggested that oral administration of CYSKT affected insulin signaling pathway, decreased HbA1c and blood glucose levels, and consequently reduced mortality rate in type 2 diabetic mice.