1.Platelet Metabolomics Analysis in Rats of Coronary Heart Disease with Blood Stasis Syndrome by Overexpression of Fibrinogen
Manli ZHOU ; Jiale ZHU ; Liping WANG ; Weixiong JIAN
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(6):230-237
ObjectiveTo analyze the metabolomic characteristics of platelets in fibrinogen(FIB) overexpression rats of coronary heart disease with blood stasis syndrome(CHD-BSS), explore potential biomarkers, and investigate the mechanism of FIB overexpression on CHD-BSS. MethodsSD rats were randomly divided into BSS group and BSS+FIB overexpression group(BSS+FIB group), with 10 rats in each group. Both the BSS+FIB group and the BSS group were fed a high-fat diet combined with oral administration of vitamin D3 and subcutaneous injection of isoproterenol, but rats in the BSS+FIB group were overexpressed with FIB during the initial modeling stage by transfection with adeno-associated virus(AAV). The overexpression level of FIB in rat liver and plasma samples was detected by enzyme-linked immunosorbent assay(ELISA) and real-time fluorescence quantitative polymerase chain reaction(Real time PCR), as well as the expression level of liver FIB A(FGA) mRNA. The characteristics of metabolites in rat platelet samples were analyzed by ultra-high performance liquid chromatography-quadrupole-electrostatic field orbital trap high-resolution mass spectrometry(UPLC-Q-Exactive Orbitrap-MS), and the differential metabolites between groups were screened by principal component analysis(PCA) and orthogonal partial least squares-discriminant analysis(OPLS-DA), and the enriched pathways were analyzed. The accuracy of potential biomarkers in the diagnosis of CHD-BSS was evaluated by receiver operating characteristic(ROC) curve. The expression of autophagy related proteins phosphorylated adenosine monophosphate(AMP) activated protein kinase(p-AMPK)/AMPK, phosphorylated mammalian target of rapamycin(p-mTOR)/mTOR, microtubule-associated protein 1 light chain 3(LC3) Ⅱ/Ⅰ and p62 in platelets were detected by Western blot. ResultsCompared with the BSS group, the expression levels of FIB in liver and plasma samples of the BSS+FIB group were significantly increased(P<0.05, P<0.01), and the expression level of FIB mRNA in the liver was remarkably increased(P<0.01), indicating successful overexpression of FIB. Platelet metabolomics results showed significant differences in metabolic profiles between the BSS+FIB group and the BSS group, and a total of 25 significantly enriched metabolic pathways and 8 metabolites involved in these metabolic pathways, among which uric acid, guanosine and ribose 1-phosphate levels were up-regulated, while adenosine diphosphate(ADP), AMP, guanosine diphosphate(GDP), adenylosuccinate and norepinephrine levels were down-regulated. The diagnostic ability analysis of differential metabolites showed that all 8 differential metabolites had good diagnostic ability, with an area under the curve(AUC)>0.85. Western blot results showed that compared with the BSS group, the expression levels of p-mTOR/mTOR and p62 proteins in platelets of the BSS+FIB group was significantly reduced(P<0.01), while the expression levels of p-AMPK/AMPK and LC3Ⅱ/Ⅰ proteins were increased, but the difference was not statistically significant. ConclusionOverexpression of FIB can change the metabolic characteristics of CHD-BSS rat model, involving multiple aspects such as vascular endothelial injury, platelet activation and myocardial function damage. Among them, overexpression of FIB may enhance the occurrence of platelet autophagy, thereby inducing platelet activation and promoting thrombus formation.
2.Mechanism of Fibrinogen Overexpression in Influencing Coronary Heart Disease with Syndrome of Blood Stasis in Rats Based on Mitochondrial Quality Control System
Manli ZHOU ; Liping WANG ; Weixiong JIAN
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(10):149-158
ObjectiveTo study the effect and mechanism of fibrinogen (Fib) overexpression on mitochondrial quality control system in the rat model of coronary heart disease with the syndrome of blood stasis. MethodsForty male SD rats were randomly assigned into normal, model, Fib, and empty vector (AAV) groups, with 10 rats in each group. The model, Fib, and AAV groups were fed with a high-fat diet adaptively and administrated with 3×106 U·kg-1 vitamin D3 powder by gavage after 7 days and 2×106 U·kg-1 vitamin D3 solution after 14 days. After being fed with a high-fat diet for 7 weeks, rats in each group received subcutaneous injection of isoproterenol (5 mg·kg-1) for 3 days. During the modeling period, rats in the normal group were fed with ordinary feed without any special treatment. The changes in blood lipid and hemorheological indexes of rats in each group were measured. The aorta tissue was stained with hematoxylin-eosin (HE), and the standard lead Ⅱ electrocardiograms (ECGs) of rats in each group were recorded. Enzyme-linked immunosorbent assay (ELISA) and real-time PCR were employed to verify the overexpression levels of Fib in the liver and plasma. Western blotting was employed to determine the protein levels of mitofusin 2 (Mfn2), optic atrophy protein 1 (OPA1), dynamin-related protein 1 (Drp1), phosphorylated adenosine monophosphate-activated protein kinase (p-AMPK)/adenosine monophosphate-activated protein kinase (AMPK), peroxisome proliferator-activated receptor γ-coactivator-1α (PGC-1α), PTEN-induced putative kinase 1, and Parkin. Real-time PCR was employed to determine the mRNA levels of AMPK and PGC-1α in the myocardial tissue. The changes in levels of adenosine triphosphate (ATP) and adenosine monophosphate (AMP) in the myocardial tissue were determined by ELISA. ResultsCompared with the normal group, the other three groups showed elevated levels of total cholesterol and low-density lipoprotein cholesterol (P<0.01) and no significant changes in levels of triglyceride and high-density lipoprotein cholesterol. Compared with the model group, the Fib and AAV groups showed risen levels of total cholesterol (P<0.05, P<0.01). Compared with the normal group, the model and Fib groups presented increases in low shear viscosity and middle shear viscosity (P<0.05, P<0.01), and the Fib group showcased an increase in high shear viscosity (P<0.01). Compared with the model group, the Fib group showed increases in low shear viscosity, middle shear viscosity, and high shear viscosity (P<0.05, P<0.01). Compared with the Fib group, the AAV group demonstrated decreases in low shear viscosity, middle shear viscosity, and high shear viscosity (P<0.05, P<0.01). The normal group had an complete aortic structure with well arrangement of elastic fibers. In the model group, the vascular wall became thickened and the intima was rough with inflammatory infiltration. In the Fib group, the intima calcification formed a cavity structure and the intima was abnormally proliferated, while in the AAV group, the intima smooth muscle was slightly proliferated with local calcification. The ECG of the normal group indicated sinus rhythm, and that of the model group presented ST segment oblique elevation (>0.1 mV). The ECG of the Fib group presented characteristic ST segment arch back elevation with T-wave towering, and that of the AAV group presented ST segment oblique elevation. Compared with the normal group, the model and Fib groups showed elevations in levels of liver Fib, plasma Fib, and liver Fibα mRNA (P<0.01), and the AAV group had risen levels of Fib and Fibα mRNA (P<0.01). Compared with the model group, the Fib group presented risen levels of liver Fib and Fibα mRNA (P<0.01). Compared with the Fib group, the AAV group presented decreases in levels of liver Fib, plasma Fib, and liver Fibα mRNA (P<0.01). Compared with the normal group, the other three groups had down-regulated protein and mRNA levels of Mfn2, OPA1, PINK1, Parkin, p-AMPK/AMPK, and PGC-1α (P<0.05, P<0.01) and up-regulated protein levels of Drp1 (P<0.01). Compared with those in the model group, the mRNA and protein levels of Mfn2, OPA1, PINK1, Parkin, p-AMPK/AMPK, and PGC-1α were all down-regulated (P<0.05, P<0.01) and the protein level of Drp1 was up-regulated (P<0.01) in the Fib group. Compared with the Fib group, the AAV group showed differences in protein levels of OPA1, PGC-1α, Parkin, and Drp1 (P<0.05, P<0.01) and an increasing trend in the mRNA levels of AMPK and PGC-1α with no significant difference. Compared with the normal group, the other three groups had elevated levels of ATP in the myocardial tissue (P<0.01). Compared with the model group, the Fib group showed elevated levels of ATP and AMP (P<0.01). Compared with the Fib group, the AAV group exhibited lowered levels of ATP and AMP (P<0.01). ConclusionFib can achieve the overexpression effect in the rat model of coronary heart disease with the syndrome of blood stasis. At the same time, the overexpression of Fib can induce the damage of the mitochondrial quality control system in the myocardial tissue, inhibit mitochondrial dynamics and mitochondrial biosynthesis, and down-regulate mitochondrial autophagy, thereby aggravating myocardial injury in the rat model.
3.Chinese Medicine Intervention on Autophagy in Lung Cancer from Theory of Healthy Qi Deficiency and Pathogenic Qi Stagnation: A Review
Yunfeng YU ; Pei TANG ; Manli ZHOU ; Xiaoxin LUO ; Weixiong JIAN
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(18):190-197
Autophagy, a mechanism of cell self-protection and self-renewal, is associated with the occurrence and development of lung cancer. Favorable autophagy can slow down the progression of lung cancer, while unfavorable autophagy can promote the progression. Therefore, regulating the level of autophagy is of great significance in the treatment of lung cancer. Healthy Qi deficiency and pathogenic Qi stagnation is an extension of the theory of deficiency and Qi stagnation proposed by the Academician WANG Yongyan. It refers to the pathological process that the abnormal body fluid metabolism caused by Qi deficiency of lung, spleen, and kidney results in phlegm and blood stasis. Lung cancer has the root cause of Qi deficiency of lung, spleen, and kidney and the syndrome of phlegm and blood stasis. The autophagy in lung cancer is interconnected with healthy Qi deficiency and pathogenic Qi stagnation. The Qi deficiency of lung, spleen, and kidney is the key factor for the weakening of favorable autophagy in lung cancer, which inhibits the apoptosis of tumor cells and leads to the accumulation of harmful substances. Phlegm and blood stasis is a direct factor enhancing the unfavorable autophagy in lung cancer, which promotes the autophagic death of normal cells, weakens the immunosuppressive effect of immune cells on tumor cells, and leads to the proliferation and migration of tumor cells. The combination of healthy Qi deficiency and pathogenic Qi stagnation results in the development of autophagy in an unfavorable direction and finally leads to the continuous progression of lung cancer. Therefore, the traditional Chinese medicine (TCM) treatment of lung cancer should follow the principle of reinforcing healthy Qi and expelling pathogenic Qi, removing phlegm and resolving stasis, so as to enhance favorable autophagy while inhibiting unfavorable autophagy. Such therapy can inhibit the proliferation and migration of tumor cells and promote the remission of lung cancer. According to the existing literature, Chinese medicine monomers are mainly used to treat lung cancer by regulating autophagy. The Chinese medicine intervention of autophagy in lung cancer mainly aims to promote the activation of autophagy. This may be because the favorable autophagy weakening caused by the Qi deficiency of lung, spleen, and kidney is the fundamental reason for the development of lung cancer.
4.Differentiation and Treatment of Bipolar Disorder based on Qi, Phlegm, Fire and Deficiency
Yunfeng YU ; Gang HU ; Manli ZHOU ; Xiaoxin LUO ; Xiahui ZHOU ; Weixiong JIAN ; Zhaokai YUAN
Journal of Traditional Chinese Medicine 2023;64(19):2037-2040
Bipolar disorder (BD) is considered to be mainly related to qi, phlegm, fire and deficiency. Binding constraint of liver qi is the initial cause, while phlegm and qi interact obstruction as well as phlegm and fire interact binding is the key pathogenesis of the transformation between depression and mania, and deficiency of both qi and yin is the main reason of the protracted course of disease. In clinical practice, BD is divided into binding constraint of liver qi pattern, phlegm and qi interact obstruction pattern, phlegm and fire interact binding pattern, and deficiency of both qi and yin pattern, which can be treated with Jinyu Shugan Powder (金玉疏肝散), Kaiyu Wendan Decoction (开郁温胆汤), Qingxin Huatan Decoction (清心化痰汤), and Baihe Shengmai Beverage (百合生脉饮) in their modifications respectively; moreover, Guanye Jinsitao (Herba Hyperici Perforati) is usually used to rectify qi, relieve phlegm and clear heat. It is also suggested to put focus on the prevention and treatment of qi, phlegm and heat simultaneously, and modify the medicinals flexibly in accordance with the pathogenesis evolution and the abnormal exuberance.
5.Inflammatory Mechanism of Coronary Heart Disease and Intervention Strategies of Chinese Medicine Based on ''Phlegm,Stasis,Toxin'' Theory
Pei LIU ; Yunfeng YU ; Xinyu YANG ; Manli ZHOU ; Yanzhen ZHAO ; Weixiong JIAN
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(12):185-191
More and more evidence shows that there is a close relationship between the inflammatory state and coronary heart disease. Inflammatory state triggers the damage of vascular endothelium in the early stage of coronary heart disease and ultimately mediates the formation of atherosclerotic plaque. The mechanism of occurrence and development of heart disease is of great significance. Phlegm is a pathological product formed by the subtle imbalance of the spleen and stomach in the transportation and transformation of water and grain. It is the general summary of a series of abnormally accumulated inflammatory substances, such as low density lipoprotein, inflammatory cells, and inflammatory factors. The nature of Phlegm determines the invasiveness and turbidity of Phlegm. Phlegm invades the meridians, causing damage to the meridians and gradually accumulating, which eventually causes the local meridian damage to aggravate. This process is similar to the persistent damage of the vascular endothelium caused by inflammation. Phlegm blocks the meridians, affects the operation of Qi and blood, causes Qi stagnation and blood stasis, and finally forms the outcome of heart and blood stasis. This process is similar to the mechanism of atherosclerotic plaques formed by continuous inflammatory damage. Heart blood stasis, depression and heat, heat toxin endogenous, forming the syndrome of heat toxin stasis, which is similar to the process of atherosclerotic plaque rupture and thrombosis causing acute cardiovascular events.The formation of Phlegm is rooted in the deficiency of spleen. Based on the ''phlegm,stasis,toxin'' theory, spleen deficiency is the intrinsic pathogenesis of the inflammatory state of coronary heart disease, and the invasion of phlegm, blood stasis of heart, heat and blood stasis are the evolution of inflammatory damage of coronary heart disease. Traditional Chinese medicine differentiation and treatment is based on strengthening the spleen and nourishing Qi to treat the root and removing phlegm and blood stasis, and clearing heat and detoxifying to treat symptoms. The related Chinese medicine compounds, Chinese patent medicines, and single Chinese medicines can reduce the inflammatory indicators of coronary heart disease, thereby improving the prognosis of coronary heart disease.
6.Strategies of Traditional Chinese Medicine Standardized Treatment Based on Syndrome Differentiation of Bipolar Disorder
Yunfeng YU ; Manli ZHOU ; Xiaoxin LUO ; Yanzhen ZHAO ; Weixiong JIAN
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(21):180-187
Bipolar disorder (BD) is a serious chronic emotional disorder with a high suicide rate and a common psychiatric disease. Traditional Chinese medicine (TCM) treatment based on syndrome differentiation of BD has unique advantages and good safety, which is expected to become a breakthrough in the treatment. Based on Expert Consensus on TCM Syndrome Differentiation Criteria for Bipolar Disorder by Professor Yin Dongqing and Professor Jia Hongxiao, this study collated the treatment protocols of BD with various syndrome types according to Meta-analysis of the existing literature in the database and evaluated the evidence level according to the evidence evaluation standard issued by the US Agency for Healthcare Research and Quality (AHRQ). (1) Depression attack. ① Liver depression and spleen deficiency syndrome: Xiaoyaosan pills or Shugan Jieyu capsules, ② Phlegm dampness and spleen stagnation syndrome: Wendantang modified with Tianwang Buxindan, ③ Heart and spleen deficiency syndrome: Jiuwei Zhenxin Granules or DANG's Ganmai Dazhaotang, ④ Fire heat and internal depression syndrome: Danzhi Xiaoyaosan Granules or Chaihu Longgu Mulitang, ⑤ Liver and kidney deficiency syndrome: JIANG's Buganshen Decoction. (2) Mania episode. ① Heart and liver fire hyperactivity syndrome: Zhengan Ningshen Formula, ② Phlegm heat harassing spirit syndrome: Huatan Xiehuo Dingshen decoction, Lianzhi Tongqiao Anshen decoction, Qingshen Dingkuang decoction or Qingshen Xingnao decoction, ③ Liver and gallbladder dampness-heat syndrome: Longdan Xiegantang. (3) Other syndrome types. ① Liver qi stagnation syndrome: modified Tongqiao Huoxue decoction, Shengyang Yiwei Acupuncture, ② Deficiency of kidney yang syndrome: Jingui Shenqitang, ③ Phlegm accumulation and blood stasis syndrome: modified Tongqiao Huoxue decoction, ④ Qi and Yin deficiency, stagnation of blood stasis syndrome: Xinnaoxin pills, ⑤ Syndrome of blood deficiency generating wind and fire heat harassing spirit: Fangji Dihuangtang.
7.Chinese Medicine Intervention in Diabetic Cardiomyopathy Based on Autophagy:A Review
Yunfeng YU ; Gang HU ; Manli ZHOU ; Xiahui ZHOU ; Yanzhen ZHAO ; Weixiong JIAN
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(22):276-282
Autophagy is a lysosome-dependent intracellular degradation process,and it is a key mechanism of diabetic cardiomyopathy (DCM). Autophagy has dual regulatory effects on DCM. Under physiological conditions,normal autophagy can promote the decomposition of damaged cardiomyocytes and metabolites,so as to reduce the damage of harmful substances to the body and provide energy for cardiomyocytes. Under pathological conditions,the inhibited autophagy of cardiomyocytes will cause the accumulation of damaged cells and metabolites,which will cause damage to cardiomyocytes and eventually aggravate cardiac dysfunction in the patients with DCM. However,the over autophagy of cardiomyocytes will lead to autophagic death of a large number of cardiomyocytes and result in pathological myocardial remodeling and cardiac dysfunction,thus promoting the progression of DCM. Therefore,the restoration of a normal autophagy level is the key means to protect cardiomyocytes and improve the prognosis of DCM. Chinese medicine can regulate autophagy to treat DCM. Specifically,it can promote autophagy (making up for deficiency) or inhibit autophagy (removing excess) to restore the balance of autophagy,thereby alleviating DCM.
8.Chinese Medicine Regulates Atherosclerosis-related Signaling Pathway: A Review
Manli ZHOU ; Yanzhen ZHAO ; Yunfeng YU ; Yifan ZHANG ; Yilei HU ; Weixiong JIAN
Chinese Journal of Experimental Traditional Medical Formulae 2022;28(15):232-239
Atherosclerotic cardiovascular disease is a common disease with high incidence rate and mortality worldwide. Atherosclerosis is an important pathological basis for the formation of ischemic cardiovascular diseases such as cardiovascular disease, which is related to inflammation, oxidative stress, apoptosis, vascular endothelial damage, foam cell formation, platelet activation, and so on, involving mitogen-activated protein kinase (MAPK), phosphoinositide 3-kinase/protein kinase B (PI3K/Akt), cyclic adenosine monophosphate/protein kinase A (cAMP/PKA), Ras homolog gene family member A (RhoA)/Rho-associated coiled-coil containing protein kinase (ROCK), nuclear factor-kappa B (NF-κB), and other signaling pathways. In the past few decades, high-intensity statins were mainly used to treat atherosclerosis by reducing blood lipid levels, which usually caused obvious side effects. Therefore, the development of safer and more effective drugs and treatment modes is the focus of research at this stage. In recent years, Chinese medicine has been playing an increasingly important role in the prevention and treatment of cardiovascular diseases in China. There are many studies on the mechanism of Chinese medicine in the prevention and treatment of atherosclerosis, and it is found that a variety of single Chinese medicine regulate the formation process of atherosclerosis by regulating targeted signal molecules. This paper reviewed the research results of related signaling pathways involved in the pathological formation of atherosclerosis and the mechanism of Chinese medicine in the prevention and treatment of cardiovascular diseases, thereby providing references for the clinical treatment of cardiovascular diseases.
9.Protective effect of Acronychia pedunculata water extract on photoaging keratinocyte model and its mechanism
Xiuling LUO ; Yuan ZHOU ; Binbin ZHAO ; Manli HUANG ; Wenyu LI ; Runge FAN ; Sijian WEN ; Jichao LI ; Huayu WU ; Youkun LIN
Chinese Journal of Medical Aesthetics and Cosmetology 2022;28(6):517-521
Objective:To investigate the protective effect and mechanism of Acronychia pedunculata water extracts on UV-induced light damage of human keratinocytes.Methods:The experiment was conducted from December 2018 to April 2020 in the Guangxi Medical University Laboratory of Genetics. The photoaged keratinocyte model was used, the cells were co-cultured with different concentrations of Acronychia pedunculata water extracts. The cell proliferation rate was detected by CCK-8 method. The levels of reactive oxygen species (ROS), malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and total antioxidant capacity (T-AOC) of cells were detected by a test kit. The levels of IL-1β, IL-6 and tumor necrosis factor-alpha (TNF-α) were determined by ELISA.Results:The proliferation of HaCaT cells was promoted by 0.5 mg/L-2.0 mg/L of the extracts. Compared with control group, the proliferation rate of HaCaT cells in the experimental group was significantly increased ( P<0.05). Compared with control group, the contents of ROS was decreased ( F=214.67, P<0.05), MDA was decreased ( F=811.88, P<0.05), SOD was increased ( F=28.95, P<0.05), CAT was increased ( F=213.31, P<0.05), GPX was increased ( F=65.10, P<0.05), T-AOC was increased ( F=305.58, P<0.05), IL-1β was decreased ( F=15.46, P<0.05), IL-6 was decreased ( F=59.2, P<0.05), and TNF-α was decreased ( F=33.13, P<0.05). Conclusions:The extracts of 0.5-2.0 mg/L of Acronychia pedunculata have protective effects on the photoaging cell model, which may be related to the increase of SOD, CAT, GPX and other antioxidant enzymes and the level of T-AOC in photoaging HaCaT cells, and the decrease of ROS, MDA content and the expression of inflammatory cytokines.
10.Viral pathogenic spectrum analysis of severe acute respiratory infection cases in Luohe City, Henan province from 2017 to 2019
Jin XU ; Zhibo XIE ; Jinyuan GUO ; Jinhua SONG ; Pei HE ; Xiaoyu MIN ; Shanshan ZHOU ; Qiang ZHANG ; Kaixuan SUN ; Manli HU ; Baicheng XIA ; Ying LIU ; Jie JIANG ; Zhen ZHU ; Naiying MAO ; Yan ZHANG ; Wenbo XU
Chinese Journal of Preventive Medicine 2021;55(8):931-937
Objective:The purpose of this study was to investigate the characteristics of viral pathogen spectrum and the epidemiological characteristics of each viral pathogen in hospitalized cases associated with severe acute respiratory infection (SARI) in Luohe City, Henan Province from 2017 to 2019.Methods:Based the SARI Case Surveillance Platform, SARI cases were collected in Central Hospital of Luohe City, Henan Province from November 2017 to February 2019. In the end, 783 SARI cases were included, whose throat swabs were taken within 24 h of admission, as well as their demographic characteristics, onset time, clinical characteristics and other information recorded. At the same time, viral identification was performed, and the age and time distribution of each virus were analyzed.Results:The age of 783 SARI cases shown as M ( P 25, P 75) was 3 (1, 5) years old, ranging from 1 month to 95 years old. Children under 5 years old were the majority (71.01%). The males (61.81%) were more than females (38.18%). Among the 783 SARI cases, a total of 9 kind of viruses were identified with 64.88% (508/783) of the throat swabs tested positive for at least one virus. The positive rate of influenza virus and human respiratory syncytial virus were both 20.18% (158 cases), which was the highest among all the detected respiratory virus. The co-infection rate was 15.84% (124/783), among which double infection was the most common, accounting for 85.48% (106/124) of the co-infected cases. And human respiratory syncytial virus, human rhinovirus and influenza virus were the most common pathogen in co-infection cases. Moreover, the viral positive rate was 68.71% in children aged 5 years and 63.27% in people aged 60-95 years. Influenza and human respiratory syncytial virus dominated in winter and spring, while human parainfluenza virus was the main infection in summer. Conclusion:Influenza virus and human respiratory syncytial virus were the main viruses in throat swabs of SARI cases from 2017 to 2019 in Luohe City, Henan Province. There were differences in the age and seasonal epidemiological characteristics of each virus.

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