1.Mechanism of Number 2 Feibi Recipe in Ameliorating Pulmonary Fibrosis in Mice by Modulating Endoplasmic Reticulum Stress in AT2 Cells to Attenuate Apoptosis and Promote Alveolar Repair
Yaodong CAI ; Jialing BEI ; Wan WEI ; Chengyan XU ; Yanli LIU ; Yong WANG ; Yang JIAO ; Yun CHEN
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):80-92
ObjectiveTo investigate the intervention mechanism of the traditional Chinese medicine Number 2 Feibi recipe (N2FBR) in idiopathic pulmonary fibrosis (IPF), focusing on its effects on endoplasmic reticulum (ER) stress, apoptosis, stemness maintenance, and regenerative capacity of alveolar type Ⅱ epithelial cells (AT2 cells), and to validate the modern translational pathway of the theory of "deficiency of Zong Qi leading to pulmonary atelectasis and atrophy". MethodsA mouse model of pulmonary fibrosis was induced by bleomycin (BLM). Mice were randomly divided into blank control, model, low-, and high-dose N2FBR intervention groups (9.1, 18.2 g·kg-1), and prednisolone intervention group (6.5 mg·kg-1). Pulmonary histopathological changes and collagen deposition were evaluated using hematoxylin-eosin (HE) and Masson's trichrome staining. Hydroxyproline (HYP) content was measured by the alkaline hydrolysis method. Lung coefficient and pulmonary function parameters were evaluated. The mRNA expression levels of fibrosis-related factors, including collagen type Ⅰ alpha 1 chain (ColIa1), alpha-smooth muscle actin (α-SMA), and tissue inhibitor of metalloproteinase 1 (Timp1), were detected by real-time polymerase chain reaction (Real-time PCR). Cell apoptosis was assessed using the terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) assay. Apoptosis of AT2 cells was further evaluated by double immunofluorescence staining for surfactant protein C (SPC) and cysteine-aspartic protease-3 (Caspase-3). Endoplasmic reticulum (ER) stress in AT2 cells was examined by double staining for SPC and protein kinase R-like endoplasmic reticulum kinase (PERK). Ultrastructural changes of ER and lamellar bodies in AT2 cells were observed by transmission electron microscopy (TEM). The expression levels of key proteins involved in ER stress and apoptosis pathways, including PERK, activating transcription factor 4 (ATF4), and Caspase-3, were detected by Western blot. Double immunofluorescence staining of SPC and Ki-67 antigen (Ki-67) was performed to evaluate the proliferative capacity of AT2 cells. Lineage tracing technology (labeling AT2 cells with GFP) combined with Krt8 labeling was used to evaluate intermediate differentiation states, and morphological transformation of AT2 cells into alveolar type Ⅰ epithelial cells (AT1) was observed. ResultsBLM-induced mice exhibited significant structural disruption of lung tissue, increased collagen deposition, elevated lung coefficient, decreased pulmonary function, and upregulation of fibrosis-related factors (P<0.01). High-dose N2FBR treatment significantly ameliorated lung tissue damage and dysfunction, significantly reduced HYP content (P<0.01), and significantly downregulated ColIa1, α-SMA, and Timp1 expression (P<0.01). Apoptosis analysis showed increased TUNEL-positive and Caspase-3-positive AT2 cells in the model group, which was significantly reduced by high-dose N2FBR treatment. TEM revealed swollen ER structures in AT2 cells of the model group, which tended to return to normal following treatment. PERK protein staining analysis showed evident ER stress in AT2 cells of the model group, which were markedly alleviated in the treatment group. The expression levels of ER stress-related proteins PERK and ATF4, as well as the apoptosis-related protein Caspase-3, were elevated in the model group and significantly reduced after treatment. TEM also revealed disrupted lamellar body structures in the model group, which tended to recover in the treatment group. Regarding the proliferative capacity of AT2 cells, the proportion of Ki-67⁺SPC⁺ AT2 cells significantly increased in the treatment group (P<0.01). Lineage tracing showed that the proportion of keratin 8-positive green fluorescent protein-positive (Krt8⁺GFP⁺) cells increased in the model group, indicating differentiation arrest. This proportion was significantly reduced in the treatment group, and the morphology of GFP⁺ cells exhibited a flattened, extended shape, suggesting restored differentiation toward AT1 cells. ConclusionN2FBR alleviates ER stress in AT2 cells, reduces AT2 cell apoptosis, restores lamellar body structure and function, enhances proliferation activity, and alleviates differentiation arrest to promote differentiation into AT1 cells, thereby repairing the alveolar epithelium and effectively blocking the progression of pulmonary fibrosis. Its traditional Chinese medicine mechanism of "replenishing Zong Qi, harmonizing Qi and blood, and unblocking pulmonary meridians" closely aligns with the modern regulatory pathway of AT2 stem cells, providing a novel theoretical basis and experimental evidence for the intervention of IPF with traditional Chinese medicine.
2.Mechanism of Number 2 Feibi Recipe in Ameliorating Pulmonary Fibrosis in Mice by Modulating Endoplasmic Reticulum Stress in AT2 Cells to Attenuate Apoptosis and Promote Alveolar Repair
Yaodong CAI ; Jialing BEI ; Wan WEI ; Chengyan XU ; Yanli LIU ; Yong WANG ; Yang JIAO ; Yun CHEN
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):80-92
ObjectiveTo investigate the intervention mechanism of the traditional Chinese medicine Number 2 Feibi recipe (N2FBR) in idiopathic pulmonary fibrosis (IPF), focusing on its effects on endoplasmic reticulum (ER) stress, apoptosis, stemness maintenance, and regenerative capacity of alveolar type Ⅱ epithelial cells (AT2 cells), and to validate the modern translational pathway of the theory of "deficiency of Zong Qi leading to pulmonary atelectasis and atrophy". MethodsA mouse model of pulmonary fibrosis was induced by bleomycin (BLM). Mice were randomly divided into blank control, model, low-, and high-dose N2FBR intervention groups (9.1, 18.2 g·kg-1), and prednisolone intervention group (6.5 mg·kg-1). Pulmonary histopathological changes and collagen deposition were evaluated using hematoxylin-eosin (HE) and Masson's trichrome staining. Hydroxyproline (HYP) content was measured by the alkaline hydrolysis method. Lung coefficient and pulmonary function parameters were evaluated. The mRNA expression levels of fibrosis-related factors, including collagen type Ⅰ alpha 1 chain (ColIa1), alpha-smooth muscle actin (α-SMA), and tissue inhibitor of metalloproteinase 1 (Timp1), were detected by real-time polymerase chain reaction (Real-time PCR). Cell apoptosis was assessed using the terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) assay. Apoptosis of AT2 cells was further evaluated by double immunofluorescence staining for surfactant protein C (SPC) and cysteine-aspartic protease-3 (Caspase-3). Endoplasmic reticulum (ER) stress in AT2 cells was examined by double staining for SPC and protein kinase R-like endoplasmic reticulum kinase (PERK). Ultrastructural changes of ER and lamellar bodies in AT2 cells were observed by transmission electron microscopy (TEM). The expression levels of key proteins involved in ER stress and apoptosis pathways, including PERK, activating transcription factor 4 (ATF4), and Caspase-3, were detected by Western blot. Double immunofluorescence staining of SPC and Ki-67 antigen (Ki-67) was performed to evaluate the proliferative capacity of AT2 cells. Lineage tracing technology (labeling AT2 cells with GFP) combined with Krt8 labeling was used to evaluate intermediate differentiation states, and morphological transformation of AT2 cells into alveolar type Ⅰ epithelial cells (AT1) was observed. ResultsBLM-induced mice exhibited significant structural disruption of lung tissue, increased collagen deposition, elevated lung coefficient, decreased pulmonary function, and upregulation of fibrosis-related factors (P<0.01). High-dose N2FBR treatment significantly ameliorated lung tissue damage and dysfunction, significantly reduced HYP content (P<0.01), and significantly downregulated ColIa1, α-SMA, and Timp1 expression (P<0.01). Apoptosis analysis showed increased TUNEL-positive and Caspase-3-positive AT2 cells in the model group, which was significantly reduced by high-dose N2FBR treatment. TEM revealed swollen ER structures in AT2 cells of the model group, which tended to return to normal following treatment. PERK protein staining analysis showed evident ER stress in AT2 cells of the model group, which were markedly alleviated in the treatment group. The expression levels of ER stress-related proteins PERK and ATF4, as well as the apoptosis-related protein Caspase-3, were elevated in the model group and significantly reduced after treatment. TEM also revealed disrupted lamellar body structures in the model group, which tended to recover in the treatment group. Regarding the proliferative capacity of AT2 cells, the proportion of Ki-67⁺SPC⁺ AT2 cells significantly increased in the treatment group (P<0.01). Lineage tracing showed that the proportion of keratin 8-positive green fluorescent protein-positive (Krt8⁺GFP⁺) cells increased in the model group, indicating differentiation arrest. This proportion was significantly reduced in the treatment group, and the morphology of GFP⁺ cells exhibited a flattened, extended shape, suggesting restored differentiation toward AT1 cells. ConclusionN2FBR alleviates ER stress in AT2 cells, reduces AT2 cell apoptosis, restores lamellar body structure and function, enhances proliferation activity, and alleviates differentiation arrest to promote differentiation into AT1 cells, thereby repairing the alveolar epithelium and effectively blocking the progression of pulmonary fibrosis. Its traditional Chinese medicine mechanism of "replenishing Zong Qi, harmonizing Qi and blood, and unblocking pulmonary meridians" closely aligns with the modern regulatory pathway of AT2 stem cells, providing a novel theoretical basis and experimental evidence for the intervention of IPF with traditional Chinese medicine.
3.Textual Research on Key Information of Famous Classical Formula Jiegengtang
Yang LEI ; Yuli LI ; Xiaoming XIE ; Zhen LIU ; Shanghua ZHANG ; Tieru CAI ; Ying TAN ; Weiqiang ZHOU ; Zhaoxu YI ; Yun TANG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(7):182-190
Jiegengtang is a basic formula for treating sore throat and cough. By means of bibliometrics, this study conducted a textual research and analysis on the key information such as formula origin, decocting methods, and clinical application of Jiegengtang. After the research, it can be seen that Jiegengtang is firstly contained in Treatise on Febrile and Miscellaneous Disease, which is also known as Ganjietang, and it has been inherited and innovated by medical practitioners of various dynasties in later times. The origins of Chinese medicines in this formula is basically clear, Jiegeng is the dried roots of Platycodon grandiflorum, Gancao is the dried roots and rhizomes of Glycyrrhiza uralensis, the two medicines are selected raw products. The dosage is 27.60 g of Glycyrrhizae Radix et Rhizoma and 13.80 g of Platycodonis Radix, decocted with 600 mL of water to 200 mL, taken warmly after meals, twice a day, 100 mL for each time. In ancient times, Jiegengtang was mainly used for treating Shaoyin-heat invasion syndrome, with cough and sore throat as its core symptoms. In modern clinical practice, Jiegengtang is mainly used for respiratory diseases such as pharyngitis, esophagitis, tonsillitis and lung abscess, especially for pharyngitis and lung abscess with remarkable efficacy. This paper can provide literature reference basis for the modern clinical application and new drug development of Jiegengtang.
4.Textual Research on Key Information of Famous Classical Formula Jiegengtang
Yang LEI ; Yuli LI ; Xiaoming XIE ; Zhen LIU ; Shanghua ZHANG ; Tieru CAI ; Ying TAN ; Weiqiang ZHOU ; Zhaoxu YI ; Yun TANG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(7):182-190
Jiegengtang is a basic formula for treating sore throat and cough. By means of bibliometrics, this study conducted a textual research and analysis on the key information such as formula origin, decocting methods, and clinical application of Jiegengtang. After the research, it can be seen that Jiegengtang is firstly contained in Treatise on Febrile and Miscellaneous Disease, which is also known as Ganjietang, and it has been inherited and innovated by medical practitioners of various dynasties in later times. The origins of Chinese medicines in this formula is basically clear, Jiegeng is the dried roots of Platycodon grandiflorum, Gancao is the dried roots and rhizomes of Glycyrrhiza uralensis, the two medicines are selected raw products. The dosage is 27.60 g of Glycyrrhizae Radix et Rhizoma and 13.80 g of Platycodonis Radix, decocted with 600 mL of water to 200 mL, taken warmly after meals, twice a day, 100 mL for each time. In ancient times, Jiegengtang was mainly used for treating Shaoyin-heat invasion syndrome, with cough and sore throat as its core symptoms. In modern clinical practice, Jiegengtang is mainly used for respiratory diseases such as pharyngitis, esophagitis, tonsillitis and lung abscess, especially for pharyngitis and lung abscess with remarkable efficacy. This paper can provide literature reference basis for the modern clinical application and new drug development of Jiegengtang.
5.Research progress on the chemical constituents,pharmacological mechanisms and clinical application of Jiegeng decoction
Yun HUANG ; Shunwang HUANG ; Jinwei QIAO ; Qian XU ; Xiaoming GAO ; Xuemei BAO ; Manqin YANG ; Ruonan XIE ; Ming CAI
China Pharmacy 2025;36(18):2348-2352
Jiegeng decoction is a classic prescription composed of two Chinese medicinal herbs: Platycodon grandiflorum and Glycyrrhiza uralensis. It has the efficacy of diffusing lung qi, resolving phlegm, relieving sore throat and discharging pus, and is commonly used in the treatment of respiratory diseases such as cough and pharyngodynia. This article reviews the chemical components, pharmacological mechanisms and clinical applications of Jiegeng decoction. It was found that Jiegeng decoction contains triterpenoid saponins, flavonoids, glycosides, acids, and other components, with platycodin D, platycodin D2, glycyrrhizic acid, glycyrrhetinic acid, liquiritin, etc., serving as the main active pharmaceutical ingredients. Jiegeng decoction and its chemical constituents exert anti-inflammatory effects by inhibiting signaling pathways such as nuclear factor-κB and mitogen- activated protein kinases, and demonstrate anti-tumor activities through mechanisms like modulating the tumor immune microenvironment and promoting cancer cell apoptosis. Additionally, it exhibits various pharmacological actions including antibacterial, antiviral, and antioxidant effects. Clinically, Jiegeng decoction, its modified prescription and compound combinations are widely used in the treatment of respiratory diseases such as cough, pneumonia, and pharyngitis, as well as digestive system disorders like constipation.
6.Research progress on dihydrochalcones from Lithocarpus litseifolius extracts in treatment of type 2 diabetes mellitus and its complications.
Yun-Qin WEI ; Yu-Lan CAI ; Yan YANG ; Shang-Heng FAN ; Lin-Li WU ; Gui-Lan NIE
China Journal of Chinese Materia Medica 2025;50(3):658-671
Type 2 diabetes mellitus(T2DM) is a prevalent metabolic and endocrine disorder. Long-term hyperglycemia can lead to severe chronic complications, imposing substantial economic burdens on both society and patients. Despite the availability of various hypoglycemic agents for clinical use, these agents often fail to meet the therapeutic needs of T2DM and its complications. Consequently, there is an urgent need for novel therapeutic strategies and drugs. Lithocarpus litseifolius(L. litseifolius), commonly referred to as "cordyceps on trees", has a long history of use in traditional medicine and can be applied in tea, sugar, and medicine. Research indicates that L. litseifolius extracts are rich in dihydrochalcones, including trilobatin, phloridzin, and phloretin, which exhibit a range of pharmacological activities, such as anti-inflammatory, antioxidant, hypoglycemic, hypolipidemic, hepatoprotective, and cardioprotective effects. These properties suggest potential applications in the treatment of T2DM and its complications. This review systematically compiled and organized the relevant literature from the past decade on dihydrochalcones(trilobatin, phloridzin, and phloretin) from L. litseifolius extracts. It highlighted recent research progress regarding their role in treating T2DM and its complications through mechanisms such as reducing insulin resistance, regulating glucose transport, improving glucose and lipid metabolism, modulating enzyme activity, regulating gut microbiota, and alleviating inflammation and oxidative damage. The purpose of this review is to provide a reference and basis for future research on the prevention and treatment of T2DM and its complications using dihydrochalcones(trilobatin, phloridzin, and phloretin) from L. litseifolius extracts.
Chalcones/chemistry*
;
Diabetes Mellitus, Type 2/metabolism*
;
Humans
;
Animals
;
Elaeocarpaceae/chemistry*
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Drugs, Chinese Herbal/therapeutic use*
;
Hypoglycemic Agents/chemistry*
;
Plant Extracts/chemistry*
7.Mechanism of Colquhounia Root Tablets against diabetic kidney disease via RAGE-ROS-PI3K-AKT-NF-κB-NLRP3 signaling axis.
Ming-Zhu XU ; Zhao-Chen MA ; Zi-Qing XIAO ; Shuang-Rong GAO ; Yi-Xin YANG ; Jia-Yun SHEN ; Chu ZHANG ; Feng HUANG ; Jiang-Rui WANG ; Bei-Lei CAI ; Na LIN ; Yan-Qiong ZHANG
China Journal of Chinese Materia Medica 2025;50(7):1830-1840
This study aimed to explore the therapeutic mechanisms of Colquhounia Root Tablets(CRT) in treating diabetic kidney disease(DKD) by integrating biomolecular network mining with animal model verification. By analyzing clinical transcriptomics data, an interaction network was constructed between candidate targets of CRT and DKD-related genes. Based on the topological eigenvalues of network nodes, 101 core network targets of CRT against DKD were identified. These targets were found to be closely related to multiple pathways associated with type 2 diabetes, immune response, and metabolic reprogramming. Given that immune-inflammatory imbalance driven by metabolic reprogramming is one of the key pathogenic mechanisms of DKD, and that many core network targets of CRT are involved in this pathological process, receptor for advanced glycation end products(RAGE)-reactive oxygen species(ROS)-phosphatidylinositol 3-kinase(PI3K)-protein kinase B(AKT)-nuclear factor-κB(NF-κB)-NOD-like receptor family pyrin domain containing 3(NLRP3) signaling axis was selected as a candidate target for in-depth research. Further, a rat model of DKD induced by a high-sugar, high-fat diet and streptozotocin was established to evaluate the pharmacological effects of CRT and verify the expression of related targets. The experimental results showed that CRT could effectively correct metabolic disturbances in DKD, restore immune-inflammatory balance, and improve renal function and its pathological changes by inhibiting the activation of the RAGE-ROS-PI3K-AKT-NF-κB-NLRP3 signaling axis. In conclusion, this study reveals that CRT alleviates the progression of DKD through dual regulation of metabolic reprogramming and immune-inflammatory responses, providing strong experimental evidence for its clinical application in DKD.
Animals
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Diabetic Nephropathies/metabolism*
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Receptor for Advanced Glycation End Products/genetics*
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NF-kappa B/genetics*
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Signal Transduction/drug effects*
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Rats
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NLR Family, Pyrin Domain-Containing 3 Protein/genetics*
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Proto-Oncogene Proteins c-akt/genetics*
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Drugs, Chinese Herbal/administration & dosage*
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Male
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Phosphatidylinositol 3-Kinases/genetics*
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Reactive Oxygen Species/metabolism*
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Humans
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Plant Roots/chemistry*
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Rats, Sprague-Dawley
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Tablets/administration & dosage*
8.Systematic review and Meta-analysis of efficacy and safety of Wumei Pills in treatment of type 2 diabetes mellitus.
Wei-Jin HUANG ; Yun-Yi YANG ; Jia-Yuan CAI ; Xiao-Xiao QU ; Yan-Ming HE ; Hong-Jie YANG
China Journal of Chinese Materia Medica 2025;50(12):3441-3451
Wumei Pills, a classic traditional Chinese medicine(TCM) formula, are widely used in the treatment of biliary ascariasis and diarrhea. In recent years, studies have shown that Wumei Pills have advantages in the treatment of type 2 diabetes mellitus(T2DM), while there are no relevant reports that systematically evaluate the efficacy of Wumei Pills in the treatment of T2DM. This study addresses this issue by systematically evaluating the efficacy and safety of Wumei Pills, aiming to provide an evidence-based basis for clinical practice. PubMed, Cochrane Library, EMbase, Web of Science, CNKI, Wanfang, and VIP were researched for the randomized controlled trial(RCT) involving Wumei Pills for the treatment of T2DM that were published from inception to September 2024. RevMan 5.3 was used for the Meta-analysis of the data. A total of 18 RCTs were included, with a total of 1 437 patients. Meta-analysis produced the following results.(1)Treatment group outperformed control group in terms of overall response rate(RR=1.28, 95%CI[1.14, 1.43], P<0.000 1), fasting blood glucose(FPG)(WMD=-0.69, 95%CI[-0.93,-0.46], P<0.000 01), two-hour postprandial plasma glucose(2hPG)(WMD=-0.74, 95%CI[-1.17,-0.31], P<0.000 7), glycated hemoglobin(HbA1c)(WMD=-0.39, 95%CI[-0.60,-0.18], P=0.000 3), high-density lipoprotein(HDL)(WMD=0.38, 95%CI[0.28, 0.48], P<0.000 01), and body mass index(BMI)(WMD=-1.41, 95%CI[-2.40,-0.42], P=0.005).(2)The two groups had comparable effects regarding total cholesterol(TC)(WMD=-0.53, 95%CI[-1.13, 0.08], P=0.09) and low-density lipoprotein(LDL)(WMD=-0.25, 95%CI[-0.56, 0.06], P=0.12).(3)Triglycerides(TG)(WMD=-0.28,95%CI [-0.59,0.03],P=0.08), sensitivity analysis showed potential reduction effect(WMD=-0.20,95%CI[-0.36,-0.04],P=0.01). Occurrence of adverse drug reaction(RR=0.43,95%CI [0.23,0.80],P=0.007), sensitivity analysis showed significant disappearance(RR=0.56,95%CI[0.26,1.22],P=0.14), suggesting that the efficacy of treatment group was not better than that of control group. The results indicate that the treatment of T2DM with Wumei Pills is greatly related to the improvement of glucose metabolism, lipid metabolism, and clinical efficacy. The findings provide a basis for clinical application of Wumei Pills in treating T2DM, while the conclusion remains to be verified by clinical studies with higher quality.
Humans
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Diabetes Mellitus, Type 2/blood*
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Drugs, Chinese Herbal/administration & dosage*
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Randomized Controlled Trials as Topic
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Blood Glucose/metabolism*
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Hypoglycemic Agents/therapeutic use*
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Treatment Outcome
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Glycated Hemoglobin/metabolism*
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Female
9.Pharmacological actions of the bioactive compounds of Epimedium on the male reproductive system: current status and future perspective.
Song-Po LIU ; Yun-Fei LI ; Dan ZHANG ; Chun-Yang LI ; Xiao-Fang DAI ; Dong-Feng LAN ; Ji CAI ; He ZHOU ; Tao SONG ; Yan-Yu ZHAO ; Zhi-Xu HE ; Jun TAN ; Ji-Dong ZHANG
Asian Journal of Andrology 2025;27(1):20-29
Compounds isolated from Epimedium include the total flavonoids of Epimedium , icariin, and its metabolites (icaritin, icariside I, and icariside II), which have similar molecular structures. Modern pharmacological research and clinical practice have proved that Epimedium and its active components have a wide range of pharmacological effects, especially in improving sexual function, hormone regulation, anti-osteoporosis, immune function regulation, anti-oxidation, and anti-tumor activity. To date, we still need a comprehensive source of knowledge about the pharmacological effects of Epimedium and its bioactive compounds on the male reproductive system. However, their actions in other tissues have been reviewed in recent years. This review critically focuses on the Epimedium , its bioactive compounds, and the biochemical and molecular mechanisms that modulate vital pathways associated with the male reproductive system. Such intrinsic knowledge will significantly further studies on the Epimedium and its bioactive compounds that protect the male reproductive system and provide some guidances for clinical treatment of related male reproductive disorders.
Male
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Epimedium/chemistry*
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Humans
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Genitalia, Male/drug effects*
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Flavonoids/therapeutic use*
;
Animals
10.Interaction between CYP3A4 gene polymorphism and obesity on breast cancer susceptibility in Chinese women.
Jiamin ZHU ; Xiaogang ZHAI ; Feng NI ; Cheng TAN ; Yun GUAN ; Baixia YANG ; Jing CAI
Environmental Health and Preventive Medicine 2025;30():88-88
BACKGROUND:
To date, results on relationship between CYP3A4 gene polymorphism were limited and inconclusive, and no study focused on the influence of CYP3A4 gene-obesity interaction on breast cancer risk, especially in Chinese women. The purpose of this study was to evaluate the impact of four single nucleotide polymorphisms (SNPs) of CYP3A4 gene, the SNP-SNP and gene-environment interactions on the susceptibility to breast cancer in Chinese women.
METHODS:
Logistic regression was used to explore the relationship between four SNPs of CYP3A4 gene and the risk of breast cancer. Generalized multifactor dimensionality reduction (GMDR) was used to screen the best SNP-SNP and gene-abdominal obesity interaction combinations among four SNPs and abdominal obesity. Haplotype examination among 4 SNPs was conducted using the SHEsis web-based platform.
RESULTS:
Logistic regression analysis showed that carriers of rs2242480- T allele have significantly higher breast cancer risk, than those with rs2242480- CC genotype, adjusted OR (95%CI) was 1.68 (1.23-2.16) and 2.03 (1.53-2.58) for participants with CT genotype and TT genotype under additive model. We did not find any notable interactions between the four SNPs within the CYP3A4 gene. GMDR model found a significant association in a two-locus model involving rs2242480 and obesity, with a p-value of 0.018. Stratified analysis found that breast cancer risk was the highest in obese participants with rs2242480- CT or TT genotype, compared to those non-obese participants with rs2242480- CC genotype, OR (95%CI) was 3.02 (1.83-4.25). We found that all haplotype combinations were not correlated with breast cancer risk.
CONCLUSIONS
We found that the T allele of rs2242480 within the CYP3A4 gene and interaction between rs2242480 and obesity were associated with an increased risk of breast cancer. However, the results of this study were only applicable to the Han ethnic group and cannot be generalized to other ethnic groups in China, and more SNPs of CYP3A4 gene should been enrolled in the analysis in the future, to verify the results obtained in this study.
Adult
;
Aged
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Female
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Humans
;
Middle Aged
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Breast Neoplasms/etiology*
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China/epidemiology*
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Cytochrome P-450 CYP3A/metabolism*
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Gene-Environment Interaction
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Genetic Predisposition to Disease
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Haplotypes
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Obesity/epidemiology*
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Polymorphism, Single Nucleotide
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Risk Factors
;
East Asian People

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