1.Strategies of HIV-1 Vaccines Based on mRNA Platforms
Pei LIU ; Zhong-Yue FANG ; Xin-Xin CHEN ; Shao-Wei LI ; Ying GU
Progress in Biochemistry and Biophysics 2026;53(4):826-839
Since its emergence in the 1980s, the human immunodeficiency virus (HIV) has caused a global pandemic, posing a severe threat to human life and health as well as social development. Although pre-exposure prophylaxis (PrEP) effectively curbs HIV transmission and antiretroviral therapy (ART) significantly extends the lifespan of patients, vaccines remain a pivotal tool for blocking transmission and ending the pandemic. The high genetic variability of HIV-1, the glycan shield of its envelope glycoproteins, and the long-term persistence of latent reservoirs have repeatedly led to bottlenecks in traditional vaccine strategies. In recent years, mRNA technology has offered a novel approach to addressing these challenges, leveraging advantages such as sequence programmability, short production cycles, native conformational expression of antigens, and self-adjuvant effects. In recent years, mRNA vaccine technology has emerged as a transformative solution to longstanding vaccinology challenges, characterized by its sequence programmability, rapid production cycles, native conformational antigen expression, and intrinsic self-adjuvanting properties. Unlike traditional platforms reliant on pathogen culture or recombinant proteins, mRNA vaccines can be expeditiously designed and updated based solely on viral genomic sequences. Lipid nanoparticle (LNP)-encapsulated mRNA facilitates endogenous antigen expression and presentation, simultaneously eliciting potent humoral and cellular immune responses. Within this landscape, self-amplifying mRNA (saRNA) further extends in vivo antigen expression to enhance the persistence of immune responses. Moreover, the LNP delivery system not only protects mRNA from degradation and mediates endosomal escape but also synergizes with mRNA to optimize immune activation via self-adjuvant effects. Importantly, mRNA platforms circumvent the pre-existing immunity associated with viral vectors and the genomic integration risks of DNA vaccines, positioning them as a cornerstone for global pandemic preparedness. This review systematically delineates recent advances in mRNA technology for HIV-1 vaccine development, focusing on four pivotal research frontiers. First, mRNA innovations building upon the RV144 trial optimize antigens through codon modification and multivalent designs to induce more durable and broad-spectrum immunity. Second, particulate mRNA vaccine strategies, utilizing virus-like particles (VLPs) and ferritin nanoparticles, achieve in situ antigen self-assembly, significantly enhancing B cell activation and reducing infection risks in non-human primate models. Third, germline-targeting mRNA vaccines address the low-affinity barrier of broadly neutralizing antibody (bNAp) precursors, efficiently activating rare precursor B cells and promoting affinity maturation. Fourth, therapeutic mRNA vaccines offer unique advantages for an HIV functional cure; combining immunogens with mRNA-encoded adjuvants potentiates cellular immunity, while LNP-mediated “shock-and-kill” strategies specifically activate latent reservoirs to guide immune clearance. Comparative analyses with traditional platforms reveal that mRNA technology redefines antigen production and presentation, simulating chronic infection through sustained expression and enabling dual-pathway presentation via endogenous synthesis. Furthermore, we explore the mechanistic innovations of mRNA vaccines in inducing bNAps: sustained in vivo production prolongs the activation window for precursor B cells and maintains germinal center (GC) reactions; endogenously expressed antigens adopt native conformations to expose conserved epitopes; and self-adjuvanting effects modulate the functions of antigen-presenting cells (APCs) and follicular helper T cells (Tfh), driving somatic hypermutation and affinity maturation. We also address critical clinical translation challenges, including immune durability, adaptability to special populations, and large-scale LNP manufacturing, while proposing targeted optimization strategies. In conclusion, this review establishes a theoretical framework for utilizing mRNA technology to overcome HIV-1 immune escape, transitioning from a descriptive paradigm to a problem-solving-based synthesis of evidence. By integrating preclinical and early clinical data, we bridge the gap between basic design and translational verification. mRNA technology is poised to become a central pillar inHIV-1 prevention and therapy, providing a robust toolset to achieve the global goal of ending the AIDS pandemic and offering a blueprint for vaccine development against other recalcitrant infectious diseases.
2.Correlation of the interaction between uric acid and inflammatory factors and hyperuricemia in overweight/obese patients
Zengyun YUAN ; Yuan LIU ; Xin LIU ; Guangquan LI ; Pei ZHONG ; Yuanting YING ; Xuezhi YANG
Journal of Public Health and Preventive Medicine 2026;37(1):171-174
Objective The aim of this study was to investigate the correlation between the interaction of uric acid and inflammatory factors and hyperuricemia in overweight/obese patients. Methods The personnel with hyperuricemia who underwent physical examination in our hospital from September 2021 to September 2022 were selected as the study subjects, and they were divided into 100 cases of overweight group and 90 cases of obese group according to the BMI index; 120 cases of healthy and non-hyperuricemic personnel were randomly selected as the control group; venous blood of the three groups was collected in 5 mL after 8 h of fasting, and were tested respectively for serum uric acid, lipid indexes and inflammatory factors: IL-6, IL-2, IFN-γ, TNF-α, IL-4, IL-10. Results Glucose, triglycerides, total cholesterol, and LDL were significantly higher in the obese group versus the overweight group (P<0.001), while HDL was significantly lower than the control group (P<0.001), and these changes were more pronounced in the obese group (P<0.001).The Pearson correlation coefficient pointed out that the levels of serum uric acid in patients with hyperuricosuric acid were significantly associated with the pro-inflammatory factors IL- 6, IL-2, IFN-γ, and TNF-α were significantly positively correlated (P<0.001), whereas they were significantly negatively correlated with the anti-inflammatory factors IL-4, IL-10 (P<0.001). Conclusion High uric acid levels in overweight/obese patients can cause enhanced inflammatory responses and reduced expression levels of anti-inflammatory factors, and the interaction between uric acid and pro-inflammatory factors aggravates the condition of patients with hyperuricemia.
3.Investigation of somatization symptoms and related factors in adolescents during frequent earthquakes in Hefei
Yu ZHUANG ; Pei TANG ; Yinghan TIAN ; Peng YAO ; Lei XIA ; Huanzhong LIU
Acta Universitatis Medicinalis Anhui 2026;61(1):141-145
ObjectiveTo investigate somatization symptoms in adolescents during frequent earthquakes in Hefei, and to explore their correlation with earthquake experiences. MethodsA cross-sectional survey was used to select 324 adolescents in Hefei as the survey objects. The self-rating scale of somatization symptoms (SSS) and the fatigue intensity scale (FIS) were used to evaluate the somatization symptoms and fatigue degree of middle school students, and multivariate Logistic regression analysis was used to explore the related factors of somatization symptoms and fatigue among middle school students. ResultsA total of 324 adolescents were included, and the overall detection rate of somatization symptoms was 6.5%, and the detection rate of moderate or above fatigue was 20.1%. The results of regression analysis showed that adolescents who were concerned about the earthquake for a longer time (≥1 h) had a higher risk of somatization symptoms (OR=5.430, 95%CI: 1.547-19.058), and adolescents who received pre-earthquake training had a lower degree of fatigue (OR=0.535, 95%CI: 0.292-0.981) (P<0.05). ConclusionDuring the frequent earthquakes, adolescents have more somatization symptoms and fatigue. Therefore, it is crucial to enhance health education, reduce the emphasis on event-related reports, and implement earthquake prevention and disaster reduction training to improve the physical and mental health of adolescents.
4.Traditional Chinese Medicine Alleviates Dry Eye Disease by Regulating Tear Film Homeostasis: A Review
Sainan TIAN ; Bin'an WANG ; Yao CHEN ; Guicheng LIU ; Li TANG ; Pei LIU ; Genyan QIN ; Jun PENG ; Qinghua PENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(7):172-181
Dry eye (DE) is a prevalent multifactorial disease of the ocular surface, clinically characterized by tear film homeostasis imbalance accompanied by related ocular surface symptoms. Specifically, the tear film is a thin liquid layer of tears covering the cornea and conjunctiva through blinking, while tear film homeostasis serves as the foundation for maintaining normal ocular surface structure and function. Insufficient tear secretion and excessive tear film evaporation lead to tear hyperosmolarity and the production of inflammatory mediators, disrupting tear film homeostasis and subsequently forming DE. Additionally, cascade reactions are triggered, resulting in a "vicious cycle of DE" that exacerbates the disease severity and prolongs its duration. Therefore, for DE treatment, it is crucial to restore tear film homeostasis and terminate this vicious cycle. Traditional Chinese medicine (TCM), which differentiates and treats DE based on systemic conditions, often achieves favorable therapeutic outcomes, offering additional treatment options for DE. Studies have demonstrated that TCM can alleviate DE by regulating tear film homeostasis and terminating the vicious cycle. This review systematically summarizes recent basic experimental research in China and abroad on TCM in alleviating DE by regulating tear film homeostasis, aiming to provide a theoretical basis for clinical treatment and an insight for research design.
5.Establishment and Evaluation of Mouse Model of Dry Eye with Lung Yin Deficiency Syndrome
Liyuan CAO ; Pei LIU ; Yuhui QIN ; Qinghua PENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(7):182-190
ObjectiveTo establish a model of dry eye with lung Yin deficiency syndrome in mice. MethodsA total of 40 SPF C57BL/6J mice were assigned via the random number table method into 5 groups (n=8): Normal control, model control, and high-, medium-, and low-dose (11.7, 5.85, and 2.925 g·kg-1, respectively) Yangyin Qingfeitang. Mice in the normal control group were fed normally without any intervention. Mice in Yangyin Qingfeitang group and model control group were treated with 0.2% benzalkonium chloride eye drops (5 μL) twice a day and fed in a controlled drying system in a dry environment for 28 days. At the same time, the mice were administrated with thyroxine tablet solution by gavage and placed in a glass fumigation tank (SO2 concentration: 0.5 g·m-3) for 14 days. After 4 weeks, mice in Yangyin Qingfeitang groups were treated with Yangyin Qingfeitang by gavage and those in the normal control group and model control group were administrated with deionized water at 0.01 mL·g-1. The body mass, anal temperature, four examination information (claw and nail appearance), basic tear secretion test, tear film rupture time, corneal fluorescein staining, and lacrimal gland HE staining were compared among groups. Compound Yangyin Qingfeitang granules were used to measure the syndrome to verify the success of modeling. ResultsAfter 28 days of continuous modeling, compared with the normal control group, the model group exhibited listless and emaciated status, coughing, drowsiness, dry and dull hair, dry and hard stool, reduced food intake and water intake, red lip circumference, red tongue with reduced fluid, dry nose and teeth, red claws and nails, body mass gain, decreased anal mild tear secretion (P<0.05), and shortened tear film rupture time (P<0.05). After 28 days of modeling, the mice showed large corneal fluorescein staining range, severe corneal injury, and increased content of interleukin (IL)-18, IL-β, and tumor necrosis factor (TNF)-α in lacrimal gland, compared with those in the normal control group (P<0.05). After the treatment with Yangyin Qingfeitang, the mice had good drinking and eating conditions, with lighter redness of the tongue, moist nose, moist and shiny teeth, and the claw and nail color close to that in the normal group. Compared with the model control group, Yangyin Qingfeitang groups showed increases in body mass and anal temperature (P<0.05), tear secretion (P<0.05), and tear film rupture time (P<0.05), narrowed range of corneal fluorescein staining, and declined levels of IL-18, IL-β, and TNF-α in lacrimal glands (P<0.01). The high-dose group had the best effect, with the indicators close to the levels in the normal control group. ConclusionThe animal model of dry eye with lung Yin deficiency syndrome can be established by culture in a controlled drying system, treatment with benzalkonium chloride eye drops for 28 days, and administration of thyroxine tablet solution combined with SO2 fumigation for 14 days.
6.Effect of Runmu Dihuang Decoction on Perimenopausal Dry Eye in Rats with Liver-kidney Yin Deficiency Syndrome Based on SIRT3/HIF-1α/NF-κB Signaling Pathway
Sainan TIAN ; Wei MA ; Yao CHEN ; Yu CAO ; Guicheng LIU ; Pei LIU ; Junxian LEI ; Qinghua PENG ; Jun PENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(7):201-210
ObjectiveTo investigate the mechanisms of Runmu Dihuang decoction (RMDHD) in treating perimenopausal dry eye with liver-kidney Yin deficiency syndrome based on the silent information regulator 3 (SIRT3)/hypoxia-inducible factor-1α (HIF-1α)/nuclear factor-κB (NF-κB) signaling pathway. MethodsSixty female Sprague-Dawley rats were randomly divided into six groups (n=10 per group): Sham operation group, model group, sodium hyaluronate eye drop group, and low-, medium-, and high-dose RMDHD groups (5.625, 11.25, 22.50 g·kg-1). Except for the sham operation group, all rats underwent bilateral ovariectomy and were administered 0.1% benzalkonium chloride eye drops combined with long-term chronic irritation to establish a perimenopausal dry eye model with liver-kidney Yin deficiency syndrome. Drug administration began in the 11th week after modeling and continued for 21 days. General conditions, screen-grip test scores, tear secretion volume, tear film breakup time (TFBUT), and corneal fluorescein staining were recorded. Serum levels of reactive oxygen species (ROS), follicle-stimulating hormone (FSH), estradiol (E2), and progesterone (PROG) were measured by enzyme-linked immunosorbent assay (ELISA). Pathological changes in the lacrimal glands, corneas, and uteri were observed using hematoxylin-eosin (HE) staining. Protein expression levels of SIRT3, HIF-1α, phosphorylated NF-κB p65 (p-NF-κB p65), and total NF-κB p65 in the lacrimal glands were detected by Western blot. The expression of inflammatory cytokines interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) in the lacrimal glands was assessed by immunohistochemistry (IHC). ResultsAfter model establishment, no significant differences were observed among the groups except the sham operation group. Compared with the sham operation group, the other groups exhibited slowed movement, dull responses, increased irritability, reduced body weight, elevated rectal temperature, decreased screen-grip test scores, reduced tear secretion, and significantly shortened TFBUT (P<0.05). After treatment, compared with the model group, the sodium hyaluronate eye drop group and all RMDHD groups showed improved general conditions, significantly increased tear secretion (P<0.05), prolonged TFBUT (P<0.05), and elevated screen-grip test scores (P<0.05). Serum ROS and FSH levels were significantly decreased, while E2 and PROG levels were significantly increased (P<0.05). Pathological damage to the cornea, lacrimal glands, and uterus was ameliorated. In addition, protein expression levels of SIRT3 and HIF-1α in the lacrimal glands were significantly upregulated (P<0.05), whereas the expression of p-NF-κB p65, IL-1β, and TNF-α was significantly downregulated (P<0.05). ConclusionRMDHD increases tear secretion and TFBUT, improves lacrimal gland and corneal injury, and alleviates dry eye symptoms in a perimenopausal dry eye rat model with liver-kidney Yin deficiency syndrome. The underlying mechanism may be related to regulation of the SIRT3/HIF-1α/NF-κB signaling pathway, inhibition of oxidative stress and inflammatory responses, and reduction of ocular surface tissue damage.
7.Mechanism of MEK/Ras/Raf/ERK Signaling Pathway Modulated by Mimenghua Prescription on Inflammatory Response in Dry Eye Animal Model
Shi TAN ; Pei LIU ; Yuan ZHONG ; Sainan TIAN ; Pengfei JIANG ; Genyan QIN ; Qinghua PENG ; Jun PENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(7):211-221
ObjectiveThis paper aims to investigate the effects and mechanism of Mimenghua prescription in modulating the mitogen-activated protein kinase kinase (MEK)/rat sarcoma viral oncogene homolog (Ras)/rapidly accelerated fibrosarcoma kinase (Raf)/extracellular signal-regulated kinase (ERK) signaling pathway to inhibit inflammatory responses in a dry eye animal model. MethodsA total of 60 C57BL/6J mice (eight weeks old, half male and half female) were used in the experiment. Ten mice were randomly selected as the blank control group, while the remaining 50 were exposed to a controlled dry system and received instillation of 0.2% benzalkonium chloride (BAC) into the eyes for four weeks to establish a dry eye mouse model. After successful modeling, the mice were randomly divided into five groups: Model group, sodium hyaluronate group, and Mimenghua prescription groups with low dose (4.83 g·kg-1), medium dose (9.67 g·kg-1), and high dose (19.34 g·kg-1). The mice in the model group received an equal volume of normal saline via gavage for four weeks. The mice in the sodium hyaluronate group received instillation of sodium hyaluronate eye drops twice daily for 14 consecutive days. The tear secretion volume, tear film break-up time (TBUT), and corneal fluorescein staining were evaluated once every two weeks. After four weeks of administration, mice were euthanized, and their lacrimal gland tissues and corneas were harvested. Hematoxylin-eosin (HE) staining was used to assess histopathological morphology. Western blot was performed to detect the protein expression levels of MEK, Ras, Raf, and ERK. Enzyme-linked immunosorbent assay (ELISA) was used to measure the contents and expressions of MEK, Ras, Raf, ERK, and interleukin (IL)-1β in lacrimal gland and corneal tissues of the mice in each group. Quantitative real-time polymerase chain reaction (Real-time PCR) was employed to determine mRNA expression levels of MEK, Ras, Raf, and ERK. ResultsThe Mimenghua prescription groups and the sodium hyaluronate group exhibited significantly increased tear secretion volume (P<0.05) and prolonged TBUT (P<0.05) after treatment. Ocular surface damage of mice was visibly recovered. Western blot results indicated that protein expression levels of MEK, Ras, Raf, and ERK in the lacrimal gland and corneal tissues were significantly downregulated in the sodium hyaluronate group and Mimenghua prescription group with high dose (P<0.05). ELISA results showed that IL-1β levels were highest in the model group but significantly reduced in the sodium hyaluronate group and Mimenghua prescription groups (P<0.05). Both ELISA and Real-time PCR results demonstrated that the expression levels of MEK, Ras, Raf, and ERK in the lacrimal glands and corneal tissues were significantly elevated in the model group (P<0.05), but markedly downregulated in the sodium hyaluronate group and Mimenghua prescription groups (P<0.05), suggesting that Mimenghua prescription can decrease the expressions of MEK, Ras, Raf, and ERK in the lacrimal glands and corneal tissues. ConclusionMimenghua prescription can reduce inflammatory responses, increase tear secretion, prolong TBUT, and promote corneal recovery by inhibiting the MEK, Ras, Raf, and ERK signaling pathways in lacrimal gland and corneal tissues.
8.Influence of Hedgehog signaling pathway activation on calvarial defect healing in type I diabetic mice
WU Yingzhang ; LIU Linan ; LIU Shibo ; HU Pei ; LUO En
Journal of Prevention and Treatment for Stomatological Diseases 2025;33(7):542-553
Objective:
This study aimed to elucidate the mechanisms underlying the impaired bone healing capacity in type 1 diabetes (T1DM) by investigating the role of the Hedgehog (Hh) signaling pathway in the impaired healing of cranial defects caused by T1DM.
Methods:
This study was approved by the experimental animal ethics committee of our hospital. A cranial defect model was established using Akita transgenic mice with spontaneous type I diabetes. The impact of T1DM on osteogenic differentiation and the Hh signaling pathway during cranial defect healing was explored by MicroCT scanning and immunohistochemical (IHC) analysis of osteocalcin (Ocn), Indian Hedgehog (Ihh), Patched1 (Ptch1), and zinc finger protein GLI1 (Gli1). Subsequently, the Hh signaling pathway was activated using smoothened agonist (SAG) (10 mg/kg, gavage), and its potential to improve cranial defect healing in T1DM was assessed by MicroCT and IHC staining. Finally, the ability of SAG (1 000 nmol/L) to counteract the inhibitory effects of a high-glucose environment (25 mol/L) on osteogenic differentiation of mouse bone marrow mesenchymal stem cells (BMSCs) was investigated through in vitro experiments. Detection methods included Alkaline Phosphatase and Alizarin Red staining, as well as quantitative real-time PCR (qPCR) analysis of the osteogenesis-related genes Alp, Spp1, Bglap, and Sp7.
Results:
Akita mice exhibited early, stable, and significant spontaneous T1DM characteristics. On postoperative day 21, the newly formed bone in the cranial defect area of Akita mice showed significant decreases in the bone volume-to-tissue volume ratio, volumetric bone mineral density, and Ocn expression (P < 0.05), with significant downregulation of Ihh, Ptch1, and Gli1 (P < 0.05). Activation of the Hh signaling pathway by SAG significantly mitigated the negative impact of T1DM on cranial defect healing in Akita mice (P < 0.05). Moreover, after SAG treatment, the inhibitory effects of the high-glucose environment on the alkaline phosphatase activity and in vitro mineralization capacity of BMSCs were significantly alleviated (P < 0.05), and the expression levels of osteogenic differentiation-related genes were significantly upregulated (P < 0.05).
Conclusion
T1DM inhibits cranial defect healing in Akita mice by suppressing the expression of the Hh signaling pathway, whereas activation of the Hh signaling pathway promotes osteogenesis and ameliorates the inhibitory effects of T1DM on bone healing.
9.Effect of Gypenosides on MAFLD Mice and Its Molecular Mechanism Based on Classical/Non-classical Ferroptosis Pathways
Yu LIU ; Yupeng PEI ; Jiaxin WANG ; Jingxuan ZHU ; Xiaofei SUN ; Qun WANG ; Peng CUI ; Nan SONG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(17):99-107
ObjectiveTo explore the effect of gypenosides (GPs) on liver lipid deposition in metabolism-associated fatty liver disease (MAFLD) mice and its mechanism based on classical/non-classical ferroptosis. MethodsEight male C57BL/6 mice in a blank group and 32 male apolipoprotein E gene knockout (ApoE-/-) mice were randomly divided into a model group, a low-dose GPs (GPs-L) group, a high-dose GPs (GPs-H) group, and a simvastatin (SV) group. Starting from the second week, mice in the blank group were given a maintenance diet, and the other four groups were fed a high-fat diet daily. After eight weeks of feeding, mice in the GPs-L and GPs-H groups were given GPs of 1.487 mg·kg-1·d-1 and 2.973 mg·kg-1·d-1, respectively, and mice in the SV group were given simvastatin of 2.275 mg·kg-1·d-1. Mice in the blank group and the model group were given saline of equal volume by gavage for four weeks. The content of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), alanine aminotransferase (ALT), and aspartate aminotransferase (AST) in the serum of mice in each group was detected by an automatic biochemical analyzer. The level of non-esterified fatty acid (NEFA) and TG in the mouse liver was measured by the kit. The change in liver tissue structure and lipid deposition was observed by hematoxylin-eosin (HE) and oil red O staining. The levels of coenzyme Q10 (CoQ10), glutathione (GSH), malondialdehyde (MDA), and Fe2+ in serum, as well as nicotinamide adenine dinucleotide phosphate [NAD(P)H] in the liver were detected by enzyme-linked immunosorbent assay (ELISA). The expression of ferroptosis suppressor protein 1 (FSP1) in the liver of mice was observed by the immunohistochemical (IHC) method, and the expression of genes and proteins related to classical and non-classical ferroptosis pathways was analyzed by real-time polymerase chain reaction (Real-time PCR) and Wes automated protein expression analysis system. ResultsCompared with those in the blank group, the levels of TC, TG, LDL-C, ALT, and AST in serum and TG and NEFA in the liver in the model group were significantly increased, and the level of HDL-C in serum was significantly decreased (P<0.01). The liver tissue structure changed, and there were fat vacuoles of different sizes and a large number of red lipid droplets, with obvious lipid deposition. The level of CoQ10 and GSH in serum and NADH in the liver were significantly decreased, while the level of MDA and Fe2+ in serum was significantly increased (P<0.01). The mRNA and protein expressions of cystine/glutamate transporter (xCT/SLC7A11), glutathione peroxidase (GPX4), p62, nuclear factor E2-related factor 2 (Nrf2), and FSP1 were significantly decreased, and the mRNA and protein expressions of tumor antigen (p53), spermidine/spermine N1-acetyltransferase 1 (SAT1), arachidonate 15-lipoxygenase (ALOX15), and Kelch-like epichlorohydrin-associated protein-1 (Keap1) were significantly increased (P<0.01). Compared with those in the model group, the level of TC, TG, LDL-C, ALT, and AST in serum and TG and NEFA in the liver of mice in the GPs-L, GPs-H, and SV groups were decreased, while the level of HDL-C in serum was significantly increased (P<0.05, P<0.01). The liver tissue structure and lipid deposition were improved. The levels of CoQ10 and GSH in serum and NADH in the liver were significantly increased, while the levels of MDA and Fe2+ in serum were significantly decreased (P<0.05, P<0.01). The mRNA and protein expressions of xCT, GPX4, p62, Nrf2, and FSP1 were significantly increased, while the mRNA and protein expressions of p53, SAT1, ALOX15, and Keap1 were significantly decreased (P<0.05, P<0.01). ConclusionGPs can interfere with liver lipid deposition in MAFLD mice through classical/non-classical ferroptosis pathways.
10.Effect of Gypenosides on MAFLD Mice and Its Molecular Mechanism Based on Classical/Non-classical Ferroptosis Pathways
Yu LIU ; Yupeng PEI ; Jiaxin WANG ; Jingxuan ZHU ; Xiaofei SUN ; Qun WANG ; Peng CUI ; Nan SONG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(17):99-107
ObjectiveTo explore the effect of gypenosides (GPs) on liver lipid deposition in metabolism-associated fatty liver disease (MAFLD) mice and its mechanism based on classical/non-classical ferroptosis. MethodsEight male C57BL/6 mice in a blank group and 32 male apolipoprotein E gene knockout (ApoE-/-) mice were randomly divided into a model group, a low-dose GPs (GPs-L) group, a high-dose GPs (GPs-H) group, and a simvastatin (SV) group. Starting from the second week, mice in the blank group were given a maintenance diet, and the other four groups were fed a high-fat diet daily. After eight weeks of feeding, mice in the GPs-L and GPs-H groups were given GPs of 1.487 mg·kg-1·d-1 and 2.973 mg·kg-1·d-1, respectively, and mice in the SV group were given simvastatin of 2.275 mg·kg-1·d-1. Mice in the blank group and the model group were given saline of equal volume by gavage for four weeks. The content of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), alanine aminotransferase (ALT), and aspartate aminotransferase (AST) in the serum of mice in each group was detected by an automatic biochemical analyzer. The level of non-esterified fatty acid (NEFA) and TG in the mouse liver was measured by the kit. The change in liver tissue structure and lipid deposition was observed by hematoxylin-eosin (HE) and oil red O staining. The levels of coenzyme Q10 (CoQ10), glutathione (GSH), malondialdehyde (MDA), and Fe2+ in serum, as well as nicotinamide adenine dinucleotide phosphate [NAD(P)H] in the liver were detected by enzyme-linked immunosorbent assay (ELISA). The expression of ferroptosis suppressor protein 1 (FSP1) in the liver of mice was observed by the immunohistochemical (IHC) method, and the expression of genes and proteins related to classical and non-classical ferroptosis pathways was analyzed by real-time polymerase chain reaction (Real-time PCR) and Wes automated protein expression analysis system. ResultsCompared with those in the blank group, the levels of TC, TG, LDL-C, ALT, and AST in serum and TG and NEFA in the liver in the model group were significantly increased, and the level of HDL-C in serum was significantly decreased (P<0.01). The liver tissue structure changed, and there were fat vacuoles of different sizes and a large number of red lipid droplets, with obvious lipid deposition. The level of CoQ10 and GSH in serum and NADH in the liver were significantly decreased, while the level of MDA and Fe2+ in serum was significantly increased (P<0.01). The mRNA and protein expressions of cystine/glutamate transporter (xCT/SLC7A11), glutathione peroxidase (GPX4), p62, nuclear factor E2-related factor 2 (Nrf2), and FSP1 were significantly decreased, and the mRNA and protein expressions of tumor antigen (p53), spermidine/spermine N1-acetyltransferase 1 (SAT1), arachidonate 15-lipoxygenase (ALOX15), and Kelch-like epichlorohydrin-associated protein-1 (Keap1) were significantly increased (P<0.01). Compared with those in the model group, the level of TC, TG, LDL-C, ALT, and AST in serum and TG and NEFA in the liver of mice in the GPs-L, GPs-H, and SV groups were decreased, while the level of HDL-C in serum was significantly increased (P<0.05, P<0.01). The liver tissue structure and lipid deposition were improved. The levels of CoQ10 and GSH in serum and NADH in the liver were significantly increased, while the levels of MDA and Fe2+ in serum were significantly decreased (P<0.05, P<0.01). The mRNA and protein expressions of xCT, GPX4, p62, Nrf2, and FSP1 were significantly increased, while the mRNA and protein expressions of p53, SAT1, ALOX15, and Keap1 were significantly decreased (P<0.05, P<0.01). ConclusionGPs can interfere with liver lipid deposition in MAFLD mice through classical/non-classical ferroptosis pathways.


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