1.Exploration of Mechanism of Huanglian Zhimutang in Treatment of Type 2 Diabetes Mellitus Based on PI3K/Akt Pathway
Lei WANG ; Yun PAN ; Lihua WAN ; Wenling TU ; Lingyong CAO
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(21):168-177
ObjectiveBased on the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway, the effects of Huanglian Zhimutang on glucose and lipid metabolism disorders and hepatic insulin resistance (IR) with type 2 diabetes mellitus (T2DM) were investigated. MethodsGoto-Kakizaki (GK) rats were fed a high-fat diet to induce a T2DM rat model and then randomly divided into four groups: normal control group, model control group, metformin group (0.10 g·kg-1), and Huanglian Zhimutang group (3.60 g·kg-1), with eight rats in each group. Drug intervention was administered continuously for 8 weeks. Serum and liver tissues were collected from each group. Fasting insulin (FINS) levels were measured using enzyme-linked immunosorbent assay (ELISA), and the homeostasis model assessment of insulin resistance (HOMA-IR) index was calculated. Total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) levels were measured using an automatic biochemical analyzer. Liver tissue pathology was observed via hematoxylin-eosin (HE) staining. Serum interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) levels were detected using ELISA. Network pharmacology and transcriptomics sequencing were combined to analyze differentially expressed genes (DEGs) in liver tissue from the normal control group, model control group, and Huanglian Zhimutang group. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis was performed to identify pathways affected by Huanglian Zhimutang intervention in T2DM. Real-time quantitative polymerase chain reaction (Real-time PCR) was used to assess the mRNA expression of insulin receptor substrate-1 (IRS-1), PI3K, Akt, and peroxisome proliferator-activated receptor gamma (PPARγ) in liver tissue, while Western blot was used to evaluate corresponding protein expression levels. ResultsAfter 8 weeks of Huanglian Zhimutang intervention, typical symptoms of T2DM rats such as polydipsia, polyphagia, and polyuria were significantly alleviated, along with reductions in fasting blood glucose levels and insulin resistance(P<0.01). Histopathological results revealed that Huanglian Zhimutang effectively improved hepatic steatosis and inflammatory edema and reduced lipid vacuole formation. Biochemical tests demonstrated that Huanglian Zhimutang significantly reduced serum levels of TC, TG, and LDL-C(P<0.01). ELISA results showed that Huanglian Zhimutang effectively decreased serum concentrations of IL-6 and TNF-α(P<0.05,P<0.01). Combined network pharmacology predictions with KEGG pathway analysis of transcriptomics showed that DEGs between the Huanglian Zhimutang and model control groups were significantly enriched in the PI3K/Akt signaling pathway. Real-time PCR and Western blot results confirmed that Huanglian Zhimutang upregulated the expression of PI3K/Akt signaling pathway-related mRNAs and proteins in liver tissue(P<0.05,P<0.01), thereby reducing inflammation, alleviating hepatic lipid accumulation, and enhancing insulin sensitivity. ConclusionHuanglian Zhimutang effectively ameliorates glucose and lipid metabolism disorders in T2DM rats. Its mechanism may be related to the regulation of the PI3K/Akt pathway, which reduces inflammation and hepatic lipid deposition and relieves hepatic insulin resistance.
2.Exploration of Mechanism of Huanglian Zhimutang in Treatment of Type 2 Diabetes Mellitus Based on PI3K/Akt Pathway
Lei WANG ; Yun PAN ; Lihua WAN ; Wenling TU ; Lingyong CAO
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(21):168-177
ObjectiveBased on the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway, the effects of Huanglian Zhimutang on glucose and lipid metabolism disorders and hepatic insulin resistance (IR) with type 2 diabetes mellitus (T2DM) were investigated. MethodsGoto-Kakizaki (GK) rats were fed a high-fat diet to induce a T2DM rat model and then randomly divided into four groups: normal control group, model control group, metformin group (0.10 g·kg-1), and Huanglian Zhimutang group (3.60 g·kg-1), with eight rats in each group. Drug intervention was administered continuously for 8 weeks. Serum and liver tissues were collected from each group. Fasting insulin (FINS) levels were measured using enzyme-linked immunosorbent assay (ELISA), and the homeostasis model assessment of insulin resistance (HOMA-IR) index was calculated. Total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) levels were measured using an automatic biochemical analyzer. Liver tissue pathology was observed via hematoxylin-eosin (HE) staining. Serum interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) levels were detected using ELISA. Network pharmacology and transcriptomics sequencing were combined to analyze differentially expressed genes (DEGs) in liver tissue from the normal control group, model control group, and Huanglian Zhimutang group. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis was performed to identify pathways affected by Huanglian Zhimutang intervention in T2DM. Real-time quantitative polymerase chain reaction (Real-time PCR) was used to assess the mRNA expression of insulin receptor substrate-1 (IRS-1), PI3K, Akt, and peroxisome proliferator-activated receptor gamma (PPARγ) in liver tissue, while Western blot was used to evaluate corresponding protein expression levels. ResultsAfter 8 weeks of Huanglian Zhimutang intervention, typical symptoms of T2DM rats such as polydipsia, polyphagia, and polyuria were significantly alleviated, along with reductions in fasting blood glucose levels and insulin resistance(P<0.01). Histopathological results revealed that Huanglian Zhimutang effectively improved hepatic steatosis and inflammatory edema and reduced lipid vacuole formation. Biochemical tests demonstrated that Huanglian Zhimutang significantly reduced serum levels of TC, TG, and LDL-C(P<0.01). ELISA results showed that Huanglian Zhimutang effectively decreased serum concentrations of IL-6 and TNF-α(P<0.05,P<0.01). Combined network pharmacology predictions with KEGG pathway analysis of transcriptomics showed that DEGs between the Huanglian Zhimutang and model control groups were significantly enriched in the PI3K/Akt signaling pathway. Real-time PCR and Western blot results confirmed that Huanglian Zhimutang upregulated the expression of PI3K/Akt signaling pathway-related mRNAs and proteins in liver tissue(P<0.05,P<0.01), thereby reducing inflammation, alleviating hepatic lipid accumulation, and enhancing insulin sensitivity. ConclusionHuanglian Zhimutang effectively ameliorates glucose and lipid metabolism disorders in T2DM rats. Its mechanism may be related to the regulation of the PI3K/Akt pathway, which reduces inflammation and hepatic lipid deposition and relieves hepatic insulin resistance.
3.Efficacy and safety of avatrombopag in the treatment of thrombocytopenia after umbilical cord blood transplantation.
Aijie HUANG ; Guangyu SUN ; Baolin TANG ; Yongsheng HAN ; Xiang WAN ; Wen YAO ; Kaidi SONG ; Yaxin CHENG ; Weiwei WU ; Meijuan TU ; Yue WU ; Tianzhong PAN ; Xiaoyu ZHU
Chinese Medical Journal 2025;138(9):1072-1083
BACKGROUND:
Delayed platelet engraftment is a common complication after umbilical cord blood transplantation (UCBT), and there is no standard therapy. Avatrombopag (AVA) is a second-generation thrombopoietin (TPO) receptor agonist (TPO-RA) that has shown efficacy in immune thrombocytopenia (ITP). However, few reports have focused on its efficacy in patients diagnosed with thrombocytopenia after allogeneic hematopoietic stem cell transplantation (allo-HSCT).
METHODS:
We conducted a retrospective study at the First Affiliated Hospital of the University of Science and Technology of China to evaluate the efficacy of AVA as a first-line TPO-RA in 65 patients after UCBT; these patients were compared with 118 historical controls. Response rates, platelet counts, megakaryocyte counts in bone marrow, bleeding events, adverse events and survival rates were evaluated in this study. Platelet reconstitution differences were compared between different medication groups. Multivariable analysis was used to explore the independent beneficial factors for platelet implantation.
RESULTS:
Fifty-two patients were given AVA within 30 days post-UCBT, and the treatment was continued for more than 7 days to promote platelet engraftment (AVA group); the other 13 patients were given AVA for secondary failure of platelet recovery (SFPR group). The median time to platelet engraftment was shorter in the AVA group than in the historical control group (32.5 days vs . 38.0 days, Z = 2.095, P = 0.036). Among the 52 patients in the AVA group, 46 achieved an overall response (OR) (88.5%), and the cumulative incidence of OR was 91.9%. Patients treated with AVA only had a greater 60-day cumulative incidence of platelet engraftment than patients treated with recombinant human thrombopoietin (rhTPO) only or rhTPO combined with AVA (95.2% vs . 84.5% vs . 80.6%, P <0.001). Patients suffering from SFPR had a slightly better cumulative incidence of OR (100%, P = 0.104). Patients who initiated AVA treatment within 14 days post-UCBT had a better 60-day cumulative incidence of platelet engraftment than did those who received AVA after 14 days post-UCBT (96.6% vs . 73.9%, P = 0.003).
CONCLUSION
Compared with those in the historical control group, our results indicate that AVA could effectively promote platelet engraftment and recovery after UCBT, especially when used in the early period (≤14 days post-UCBT).
Humans
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Female
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Male
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Thrombocytopenia/etiology*
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Adult
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Retrospective Studies
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Cord Blood Stem Cell Transplantation/adverse effects*
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Middle Aged
;
Adolescent
;
Young Adult
;
Thiazoles/adverse effects*
;
Platelet Count
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Receptors, Thrombopoietin/agonists*
;
Child
;
Thiophenes
4.Fucoidan sulfate regulates Hmox1-mediated ferroptosis to ameliorate myocardial injury in diabetic cardiomyopathy.
Yu-Feng CAI ; Wei HU ; Yi-Gang WAN ; Yue TU ; Si-Yi LIU ; Wen-Jie LIU ; Liu-Yun-Xin PAN ; Ke-Jia WU
China Journal of Chinese Materia Medica 2025;50(9):2461-2471
This study explores the role and underlying molecular mechanisms of fucoidan sulfate(FPS) in regulating heme oxygenase-1(Hmox1)-mediated ferroptosis to ameliorate myocardial injury in diabetic cardiomyopathy(DCM) through in vivo and in vitro experiments and network pharmacology analysis. In vivo, a DCM rat model was established using a combination of "high-fat diet feeding + two low-dose streptozotocin(STZ) intraperitoneal injections". The rats were randomly divided into four groups: normal, model, FPS, and dapagliflozin(Dapa) groups. In vitro, a cellular model was created by inducing rat cardiomyocytes(H9c2 cells) with high glucose(HG), using zinc protoporphyrin(ZnPP), an Hmox1 inhibitor, as the positive control. An automatic biochemical analyzer was used to measure blood glucose(BG), serum aspartate aminotransferase(AST), serum lactate dehydrogenase(LDH), and serum creatine kinase-MB(CK-MB) levels. Echocardiography was used to assess rat cardiac function, including ejection fraction(EF) and fractional shortening(FS). Pathological staining was performed to observe myocardial morphology and fibrotic characteristics. DCFH-DA fluorescence probe was used to detect reactive oxygen species(ROS) levels in myocardial tissue. Specific assay kits were used to measure serum brain natriuretic peptide(BNP), myocardial Fe~(2+), and malondialdehyde(MDA) levels. Western blot(WB) was used to detect the expression levels of myosin heavy chain 7B(MYH7B), natriuretic peptide A(NPPA), collagens type Ⅰ(Col-Ⅰ), α-smooth muscle actin(α-SMA), ferritin heavy chain 1(FTH1), solute carrier family 7 member 11(SLC7A11), glutathione peroxidase 4(GPX4), 4-hydroxy-2-nonenal(4-HNE), and Hmox1. Immunohistochemistry(IHC) was used to examine Hmox1 protein expression patterns. FerroOrange and Highly Sensitive DCFH-DA fluorescence probes were used to detect intracellular Fe~(2+) and ROS levels. Transmission electron microscopy was used to observe changes in mitochondrial morphology. In network pharmacology, FPS targets were identified through the PubChem database and PharmMapper platform. DCM-related targets were integrated from OMIM, GeneCards, and DisGeNET databases, while ferroptosis-related targets were obtained from the FerrDb database. A protein-protein interaction(PPI) network was constructed for the intersection of these targets using STRING 11.0, and core targets were screened with Cytoscape 3.9.0. Molecular docking analysis was conducted using AutoDock and PyMOL 2.5. In vivo results showed that FPS significantly reduced AST, LDH, CK-MB, and BNP levels in DCM model rats, improved cardiac function, decreased the expression of myocardial injury proteins(MYH7B, NPPA, Col-Ⅰ, and α-SMA), alleviated myocardial hypertrophy and fibrosis, and reduced Fe~(2+), ROS, and MDA levels in myocardial tissue. Furthermore, FPS regulated the expression of ferroptosis-related markers(Hmox1, FTH1, SLC7A11, GPX4, and 4-HNE) to varying degrees. Network pharmacology results revealed 313 potential targets for FPS, 1 125 targets for DCM, and 14 common targets among FPS, DCM, and FerrDb. Hmox1 was identified as a key target, with FPS showing high docking activity with Hmox1. In vitro results demonstrated that FPS restored the expression levels of ferroptosis-related proteins, reduced intracellular Fe~(2+) and ROS levels, and alleviated mitochondrial structural damage in cardiomyocytes. In conclusion, FPS improves myocardial injury in DCM, with its underlying mechanism potentially involving the regulation of Hmox1 to inhibit ferroptosis. This study provides pharmacological evidence supporting the therapeutic potential of FPS for DCM-induced myocardial injury.
Animals
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Ferroptosis/drug effects*
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Rats
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Diabetic Cardiomyopathies/physiopathology*
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Male
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Rats, Sprague-Dawley
;
Polysaccharides/pharmacology*
;
Heme Oxygenase-1/genetics*
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Myocytes, Cardiac/metabolism*
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Myocardium/pathology*
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Humans
;
Cell Line
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Heme Oxygenase (Decyclizing)
5.Effects and mechanisms of total flavones of Abelmoschus manihot combined with empagliflozin in attenuating diabetic tubulopathy through multiple targets based on mitochondrial homeostasis and ZBP1-mediated PANoptosis.
Si-Yu CHA ; Meng WANG ; Yi-Gang WAN ; Si-Ping DING ; Yu WANG ; Shi-Yu SHEN ; Wei WU ; Ying-Lu LIU ; Qi-Jun FANG ; Yue TU ; Hai-Tao TANG
China Journal of Chinese Materia Medica 2025;50(13):3738-3753
This study aimed to explore the mechanisms and molecular targets of total flavones of Abelmoschus manihot(TFA) plus empagliflozin(EM) in attenuating diabetic tubulopathy(DT) by targeting mitochondrial homeostasis and pyroptosis-apoptosis-necroptosis(PANoptosis). In the in vivo study, the authors established the DT rat models through a combination of uninephrectomy, administration of streptozotocin via intraperitoneal injections, and exposure to a high-fat diet. Following modeling successfully, the DT rat models received either TFA, EM, TFA+EM, or saline(as a vehicle) by gavage for eight weeks, respectively. In the in vitro study, the authors subjected the NRK52E cells with or without knock-down Z-DNA binding protein 1(ZBP1) to a high-glucose(HG) environment and various treatments including TFA, EM, and TFA+EM. In the in vivo and in vitro studies, The authors investigated the relative characteristics of renal tubular injury and renal tubular epithelial cells damage induced by reactive oxygen species(ROS), analyzed the relative characteristics of renal tubular PANoptosis and ZBP1-mediatted PANoptosis in renal tubular epithelial cells, and compared the relative characteristics of the protein expression levels of marked molecules of mitochondrial fission in the kidneys and mitochondrial homeostasis in renal tubular epithelial cells, respectively. Furthermore, in the network pharmacology study, the authors predicted and screened targets of TFA and EM using HERB and SwissTargetPrediction databases; The screened chemical constituents and targets of TFA and EM were constructed the relative network using Cytoscape 3.7.2 network graphics software; The relative targets of DT were integrated using OMIM and GeneCards databases; The intersecting targets of TFA, EM, and DT were enriched and analyzed signaling pathways by Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG) software using DAVID database. In vivo study results showed that TFA+EM could improve renal tubular injury, the protein expression levels and characteristics of key signaling molecules in PANoptosis pathway in the kidneys, and the protein expression levels of marked molecules of mitochondrial fission in the kidneys. And that, the ameliorative effects in vivo of TFA+EM were both superior to TFA or EM. Network pharmacology study results showed that TFA+EM treated DT by regulating the PANoptosis signaling pathway. In vitro study results showed that TFA+EM could improve ROS-induced cell injury, ZBP1-mediatted PANoptosis, and mitochondrial homeostasis in renal tubular epithelial cells under a state of HG, including the protein expression levels of marked molecules of mitochondrial fission, mitochondrial ultrastructure, and membrane potential level. And that, the ameliorative effects in vitro of TFA+EM were both superior to TFA or EM. More importantly, using the NRK52E cells with knock-down ZBP1, the authors found that, indeed, ZBP1 was mediated PANoptosis in renal tubular epithelial cells as an upstream factor. In addition, TFA+EM could regulate the protein expression levels of marked signaling molecules of PANoptosis by targeting ZBP1. In summary, this study clarified that TFA+EM, different from TFA or EM, could attenuate DT with multiple targets by ameliorating mitochondrial homeostasis and inhibiting ZBP1-mediated PANoptosis. These findings provide the clear pharmacological evidence for the clinical treatment of DT with a novel strategy of TFA+EM, which is named "coordinated traditional Chinese and western medicine".
Animals
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Rats
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Mitochondria/metabolism*
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Benzhydryl Compounds/administration & dosage*
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Glucosides/administration & dosage*
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Abelmoschus/chemistry*
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Male
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Homeostasis/drug effects*
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Flavones/administration & dosage*
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Rats, Sprague-Dawley
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Diabetic Nephropathies/physiopathology*
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Drugs, Chinese Herbal/administration & dosage*
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DNA-Binding Proteins/genetics*
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Humans
;
Apoptosis/drug effects*
6.A clinical comparative study of domestic nasal packing sponge and imported nasopore sponge in post-sinusotomy care.
Shengyang LIU ; Tao LI ; Shujuan SUN ; Peng YU ; Yanyi TU ; Limian XIAO ; Yuzhu WAN ; Li SHI
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2025;39(1):71-76
Objective:This study aims to investigate the differences in hemostatic efficacy and patient comfort between an innovative domestically produced biodegradable nasal packing sponge and a traditional absorbent sponge following endoscopic nasal surgery. Methods:A prospective, randomized controlled trial design was utilized, including 30 patients who were divided into two groups according to random allocation, each receiving one of the two types of nasal packing. The study assessed the hemostatic efficacy, comfort, and safety of the materials by comparing the rates of no bleeding within 24 hours after packing, re-bleeding rates after 48 hours, pain ratings in the head and nasal areas, scores on a visual analog scale for nasal ocular symptoms, and safety indicators between the two groups. Results:The rates of no bleeding within 24 hours post-packing were 73.33% for both the experimental and control groups, with a no-bleeding rate of 100% after 48 hours in both groups. The pain rating in the head and nasal areas at various times post-packing was Grade Ⅰ(100%) in both groups, with no statistically significant difference(P=1.000). The experimental groups sneezing score on the day of packing was(0.73±1.03), lower than the control groups(2.27±1.67), (P=0.007); after 48 hours, the experimental groups sneezing score was(0.67±0.98), also lower than the control groups(1.67±1.18), (P=0.019). There was no significant difference between the two groups in the Lund-Kennedy scoring during endoscopic examinations at the screening period, 7 days, 1 month, and 3 months post-packing(P>0.05). Laboratory tests for other examination indicators were normal in both groups. Conclusion:The innovative domestically produced biodegradable nasal packing sponge not only provides hemostatic efficacy comparable to imported materials but also significantly improves patient comfort after surgery. It represents an economical and effective choice for nasal packing materials.
Humans
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Prospective Studies
;
Surgical Sponges
;
Endoscopy/methods*
;
Male
;
Female
;
Epistaxis/prevention & control*
;
Middle Aged
;
Nasal Surgical Procedures/methods*
;
Adult
7.DiPTAC: A degradation platform via directly targeting proteasome.
Yutong TU ; Qian YU ; Mengna LI ; Lixin GAO ; Jialuo MAO ; Jingkun MA ; Xiaowu DONG ; Jinxin CHE ; Chong ZHANG ; Linghui ZENG ; Huajian ZHU ; Jiaan SHAO ; Jingli HOU ; Liming HU ; Bingbing WAN ; Jia LI ; Yubo ZHOU ; Jiankang ZHANG
Acta Pharmaceutica Sinica B 2025;15(1):661-664
8.Aryl hydrocarbon receptor: Linking environment to aging process in elderly patients with asthma
Tianrui YANG ; Rongjun WAN ; Wei TU ; Nithin Sai AVVARU ; Peisong GAO
Chinese Medical Journal 2024;137(4):382-393
Aging is a significant risk factor for various diseases, including asthma, and it often leads to poorer clinical outcomes, particularly in elderly individuals. It is recognized that age-related diseases are due to a time-dependent accumulation of cellular damage, resulting in a progressive decline in cellular and physiological functions and an increased susceptibility to chronic diseases. The effects of aging affect not only the elderly but also those of younger ages, posing significant challenges to global healthcare. Thus, understanding the molecular mechanisms associated with aging in different diseases is essential. One intriguing factor is the aryl hydrocarbon receptor (AhR), which serves as a cytoplasmic receptor and ligand-activated transcription factor and has been linked to the aging process. Here, we review the literature on several major hallmarks of aging, including mitochondrial dysfunction, cellular senescence, autophagy, mitophagy, epigenetic alterations, and microbiome disturbances. Moreover, we provide an overview of the impact of AhR on these hallmarks by mediating responses to environmental exposures, particularly in relation to the immune system. Furthermore, we explore how aging hallmarks affect clinical characteristics, inflammatory features, exacerbations, and the treatment of asthma. It is suggested that AhR signaling may potentially play a role in regulating asthma phenotypes in elderly populations as part of the aging process.
9.Construction and validation of a visual prediction model for the risk of urinary tract infection after PKRP surgery
Fan YE ; Yuying WAN ; Ping TU ; Chuntao XU
China Modern Doctor 2024;62(12):19-23
Objective To analyze the influencing factors of postoperative urinary tract infection in patients undergoing transurethral resection of the prostate with plasmakinetic energy(PKRP)and establish a risk prediction nomogram model.Methods The data of PKRP patients in Department of Urology,the Second Affiliated Hospital of Nanchang University from December 2020 to September 2021 were selected as the modeling set,and the high-risk factors were screened by univariate analysis and Logistic regression analysis.The risk prediction nomogram model was constructed and verified internally and externally.Results The incidence of urinary tract infection after PKRP surgery was 15.38%.Multivariate analysis showed that age,other location infection,diabetes,preoperative catheterization,urethral injury,indwelling catheter material,hair coloring catheter replacement times and number of indwelling catheterization were risk factors for urinary tract infection(P<0.05).Internal verification(area under the curve was 0.875)and external verification(area under the curve was 0.869)show that the risk prediction nomogram model has good discrimination and accuracy.Conclusion The influencing factors of urinary tract infection after PKRP are complex.The risk prediction nomogram model has good prediction performance,which can provide a basis for the prevention and treatment of urinary tract infection after PKRP.
10.Effects of Chrysanthemi Flos on blood pressure of spontaneously hypertensive rats based on its antioxidant activity in vitro and in vivo
Xin LU ; Liu-Ji ZHANG ; Kai-Yan LI ; Wan-Qian TU ; Jian-Xia WANG
The Chinese Journal of Clinical Pharmacology 2024;40(4):564-568
Objective To study the effects of Chrysanthemum Flos on blood pressure of spontaneously hypertensive rats(SHR)and evaluate its antioxidant activity in vitro and in vivo.Methods SHR were randomly divided into model,control and experimental-L,-H groups with 10 rats per group,and 10 WKY rats as blank group.Experimental-H,-L groups were given 2.10 and 0.525 g·kg-1 Chrysanthemum Flos extract by gavage;control group received 5.25 mg·kg-1 losartan by gavage;blank and model groups were given the same volume of 0.9%NaCl solution by gavage.Rats in each group were gavaged once a day for 8 weeks.After 8 weeks of continuous intragastric administration,the systolic blood pressure(SBP)and diastolic blood pressure(DBP)were observed.The contents of catalase(CAT),superoxide dismutase(SOD),glutathione peroxidase(GSH)and malondialdehyde(MDA)in serum were measured with kit colorimetry method.The in vitro free radical scavenging rates of Chrysanthemum Flos extract were detected by 1,1-diphenyl-2-picrylhydrazyl(DPPH)and 2,2'-amino-di(2-ethyl-benzothiazoline sulphonic acid-6)ammonium salt(ABTS)methods.Results The SBP of blank,model,control and experimental-H,-L groups were(132.00±2.45),(204.00±4.55),(171.00±2.16),(181.00±3.74)and(184.67±4.78)mmHg;the DBP were(73.33±4.03),(175.67±3.40),(120.33±0.94),(125.33±2.87)and(125.67±2.36)mmHg;the contents of serum CAT were(9.24±3.99),(8.40±2.98),(9.24±2.42),(8.59±2.70)and(8.49±1.47)U·mL-1;the contents of serum SOD were(122.40±12.30),(75.30±28.37),(125.39±31.35),(110.92±26.14)and(103.37±22.31)U·mL-1;the contents of serum GSH were(117.93±10.18),(78.29±23.68),(118.57±26.08),(109.89±20.52)and(98.73±14.71)U·mL-1;the contents of serum MDA were(8.36±2.08),(8.45±3.38),(8.22±3.04),(7.09±3.21)and(7.24±3.32)nmol·L 1,respectively.Compared with model group,the differences of above indicators in control group and experimental-H,-L groups were statistically significant(P<0.05,P<0.01).Chrysanthemum Flos extract showed certain free radical scavenging ability in vitro.The highest scavenging rates of DPPH and ABTS were 90.29%and 92.67%,respectively.Conclusion Chrysanthemum Flos extract had good antihypertensive activity.The antioxidation ability might be its antihypertensive mechanisms.

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