Shenmai Injection Improves Hypertensive Heart Failure by Inhibiting Myocardial Fibrosis via TGF-β 1/Smad Pathway Regulation / 中国结合医学杂志

OBJECTIVE@#To study effects of Shenmai Injection on hypertensive heart failure and its mechanism for inhibiting myocardial fibrosis.@*METHODS@#Salt-sensitive (Dahl/SS) rats were fed with normal diet (0.3% NaCl) and the high-salt diet (8% NaCl) to observe the changes in blood pressure and heart function, as the control group and the model group. Salt-insensitive rats (SS-13BN) were fed with the high-salt diet (8% NaCl) as the negative control group. After modeling, the model rats were randomly divided into heart failure (HF) group, Shenmai Injection (SMI) group and pirfenidone (PFD) group by a random number table, with 6 rats in each group. They were given sterilized water, SMI and pirfenidone, respectively. Blood pressure, cardiac function, fibrosis and related molecular expression were detected by sphygmomanometer, echocardiogram, enzyme linked immunosorbent assay (ELISA), hematoxylin-eosin staining, Masson staining, immunofluorescence and qPCR analysis.@*RESULTS@#After high-salt feeding, compared with the control and negative control group, in the model group the blood pressure increased significantly, the left ventricular ejection fraction (LVEF) and left ventricular fraction shortening (LVFS) were significantly reduced, and the serum NT-proBNP concentration increased significantly (all P<0.05); furthermore, the arrangement of myocardial cells was disordered, the edema was severe, and the degree of myocardial fibrosis was also significantly increased (P<0.05); the protein and mRNA expressions of collagen type I (Col I) were up-regulated (P<0.05), and the mRNA expressions of transforming growth factor β 1 (TGF- β 1), Smad2 and Smad3 were significantly up-regulated (P<0.05). Compared with HF group, after intervention of Shenmai Injection, LVEF and LVFS increased, myocardial morphology was improved, collagen volume fraction decreased significantly (P<0.05), and the mRNA expressions of Col I, TGF- β 1, Smad2 and Smad3, as well as Col I protein expression, were all significantly down-regulated (all P<0.05).@*CONCLUSION@#Myocardial fibrosis is the main pathological manifestation of hypertensive heart failure, and Shenmai Injection could inhibit myocardial fibrosis and effectively improve heart failure by regulating TGF-β 1/Smad signaling pathway.

Pathogenesis of chronic heart failure in rats based on ferroptosis-mediated oxidative stress and intervention effect of Shenfu Injection / 中国中药杂志

This study aims to investigate the pathogenesis of chronic heart failure based on ferroptosis-mediated oxidative stress and predict the targets of Shenfu Injection in treating chronic heart failure. A rat model of chronic heart failure was established by the isoproterenol induction method. According to the random number table method, the modeled rats were assigned into three groups: a model group, a Shenfu Injection group, and a ferrostatin-1(ferroptosis inhibitor) group. In addition, a normal group was designed. After 15 days of intervention, the cardiac mass index and left ventricular mass index were determined. Echocardiography was employed to eva-luate the cardiac function. Hematoxylin-eosin staining and Masson staining were employed to reveal the pathological changes and fibrosis of the heart, and Prussian blue staining to detect the aggregation of iron ions in the myocardial tissue. Transmission electron microscopy was employed to observe the mitochondrion ultrastructure in the myocardial tissue. Colorimetry was adopted to measure the levels of iron metabolism, lipid peroxidation, and antioxidant indicators. Flow cytometry was employed to measure the content of lipid-reactive oxygen species(ROS) and the fluorescence intensity of ROS. Western blot and RT-qPCR were employed to determine the protein and mRNA levels, respectively, of ferroptosis-related factors in the myocardial tissue. The results showed that the rats in the model group had reduced cardiac function, elevated levels of total iron and Fe~(2+), lowered level of glutathione(GSH), increased malondialdehyde(MDA), decreased superoxide dismutase(SOD) and glutathione peroxidase(GSH-Px), and rising levels of ROS and lipid-ROS. In addition, the model group showed fibrous tissue hyperplasia with inflammatory cell infiltration and myocardial fibrosis, iron ion aggregation, and characteristic mitochondrial changes specific for iron death. Moreover, the model group showcased upregulated protein and mRNA levels of p53 and COX2 and downregulated protein and mRNA levels of GPX4, FTH1, SLC7A11, and Nrf2 in the myocardial tissue. The intervention with Shenfu Injection significantly improved the cardiac function, recovered the iron metabolism, lipid peroxidation, and antioxidant indicators, decreased iron deposition, improved mitochondrial structure and function, and alleviated inflammatory cell infiltration and fibrosis. Furthermore, Shenfu Injection downregulated the mRNA and protein levels of p53 and COX2 and upregulated the mRNA and protein levels of GPX4, FTH1, SLC7A11, and Nrf2 in the myocardial tissue. Shenfu Injection can improve the cardiac function by regulating iron metabolism, inhibiting ferroptosis, and reducing oxidative stress injury.

Protective effect of Shenfu Injection on regulation of autophagy in rats with chronic heart failure based on PI3K/Akt/mTOR pathway / 中国中药杂志

This study aimed to investigate the mechanism and target sites of Shenfu Injection in the intervention of chronic heart fai-lure based on the PI3K/Akt/mTOR autophagy signaling pathway. The chronic heart failure model was induced in rats by subcutaneous injection of isoproterenol. The model rats were randomly divided into model group, Shenfu Injection group, and 3-methyladenine autophagy inhibitor(3-MA) group. A normal group was also set up. After 15 days of administration, cardiac function indexes of the rats were detected by echocardiography. The serum N-terminal pro-B-type natriuretic peptide(NT-proBNP) levels were measured using the ELISA. HE and Masson staining was performed to observe the morphological changes in myocardial tissues, and electron microscopy was used to observe the autophagosomes in myocardial tissues. Western blot was conducted to measure the changes in autophagy-related proteins(LC3 Ⅱ/Ⅰ and p62), PI3K, Akt, mTOR, and phosphorylation levels. The results showed that compared with normal group, model group in rats led to reduced cardiac function, significant activation of cardiac autophagy, increased fibrotic lesions in myocardial tissues, structural disorder of the myocardium, increased autophagosomes, and cytoplasmic vacuolization. Compared with model group, Shenfu Injection group in rats led to cardiac function significantly improved, myocardial fibrosis decreased, and the number of autophagosomes and cytoplasmic vacuolization decreased. The phosphorylation levels of PI3K, Akt, and mTOR were significantly increased(P<0.01). In the 3-MA group, autophagy was inhibited through the activation of the PI3K/Akt/mTOR signaling pathway, resulting in improved cardiac function, reduced myocardial fibrosis, and no significant cytoplasmic vacuolization. The findings suggest that Shenfu Injection can activate the PI3K/Akt/mTOR signaling pathway and inhibit autophagy, thereby improving cardiac function.

Shenfu Injection improves chronic heart failure by regulating pyroptosis based on NLRP3/caspase-1 pathway / 中国中药杂志

This study investigated the mechanisms and targets of Shenfu Injection in the intervention in chronic heart failure(CHF) through the NOD-like receptor thermal protein domain associated protein 3(NLRP3)/caspase-1 signaling pathway. A CHF model was induced in rats by subcutaneous injection of isoproterenol. Model rats were randomly divided into a model group, a Shenfu Injection group, and a MCC950(NLRP3 inhibitor) group, and a blank group was also set up as a control. After 15 days of treatment, echocardiography was performed to measure cardiac function parameters [left ventricular ejection fraction(LVEF) and left ventricular fractional shortening(LVFS)]. Enzyme-linked immunosorbent assay(ELISA) was used to measure serum levels of N-terminal pro-brain natriuretic peptide(NT-proBNP), interleukin(IL)-1β, and IL-18. Hematoxylin-eosin(HE) and Masson staining were used to observe morphological changes in myocardial tissues, and Western blot was used to measure the expression levels of NLRP3/caspase-1 pathway-related proteins [NLRP3, caspase-1, apoptosis-associated speck-like protein containing a CARD(ASC), gasdermin D(GSDMD), IL-1β, and IL-18]. The study found that isoproterenol-induced CHF in rats resulted in decreased cardiac function, worsened myocardial fibrosis, increased expression levels of NLRP3, ASC, caspase-1, GSDMD-N, IL-1β, and IL-18 in myocardial tissues, elevated serum inflammatory factors, and induced myocardial cell pyroptosis. Following Shenfu Injection intervention, the Shenfu Injection group showed significantly improved LVEF and LVFS, a significant decrease in NT-proBNP, a marked downregulation of NLRP3, ASC, caspase-1, GSDMD-N, IL-1β, and IL-18 protein expression levels, reduced serum inflammatory factors IL-1β and IL-18 expression in CHF rats, and a decrease in the rate of TUNEL-positive cells. Shenfu Injection can significantly improve cardiac function in CHF, inhibit myocardial fibrosis, and alleviate the progression of myocardial cell pyroptosis through the inhibition of the NLRP3/caspase-1 pathway.

Pathological Process Observation and Non-targeted Metabolomics Analysis of Heart Failure Rat Model Established by Transverse Aortic Constriction / 中国实验方剂学杂志

ObjectiveTo study the pathological process and changes of metabolites in myocardial tissue of heart failure induced by transverse aortic constriction （TAC） in rats. MethodRats were treated with TAC operation and divided into TAC-30 d group and TAC-60 d group， and sham operation group at the same period was set up as control. Echocardiography and pathological staining of myocardial tissue were performed on rats in each group. Enzyme-linked immunosorbent assay was used to determine the expression of amino-terminal pro-brain natriuretic peptide （NT-proBNP） and adenosine triphosphate （ATP） in serum. Liquid chromatography-mass spectrometry was used to observe the changes of metabolites and related pathways in myocardial tissue， the mobile phase consisted of 25 mmol·L-1 ammonium acetate and 25 mmol·L-1 ammonia hydroxide in water （A） and acetonitrile （B） for gradient elution （0-0.5 min， 95%B； 0.5-7 min， 95%-65%B； 7-8 min， 65%-40%B； 8-9 min， 40%B； 9-9.1 min， 40%-95%B； 9.1-12 min， 95%B）， electrospray ionization was used under positive and negative ion detection modes， acquisition range was m/z 70-1 050. ResultCompared with the sham-30 d group， the left ventricular internal diameter at end-systole （LVIDs） in TAC-30 d group was significantly decreased （P<0.01）， and left ventricular ejection fraction （LVEF）， fraction shortening （FS）， left ventricular end-diastolic posterior wall thickness （LVPWd）， left vebtricular end-systolic posterior wall thickness （LVPWs） were significantly increased （P<0.01）， there were cardiomyocyte arrangement disorder， edema， collagen fibre hyperplasia， the content of NT-probNP was significantly increased， while the content of ATP was significantly decreased （P<0.01）， and 15 metabolites with abnormal expression were involved in pyrimidine metabolic pathway， pantothenic acid and coenzyme A biosynthesis pathway. Compared with the sham-60 d group， LVEF and FS in the TAC-60 d group were significantly decreased （P<0.01）， and left ventricular internal diameter at end-diastole （LVIDd）， LVIDs and LVPWd were increased （P<0.05， P<0.01）， the edema of myocardial cells increased obviously， myocardium fibers degenerated， coagulation necrosis appeared， and a large amount of collagen fibers were deposited， the expression of NT-proBNP increased and the expression of ATP decreased （P<0.01）， there were 21 metabolites with abnormal expression， involving pyrimidine metabolic pathway， and starch and sucrose metabolic pathway. ConclusionAt 30 d after TAC， there are myocardial hypertrophy， lipid metabolism disorder， pyrimidine metabolism disorder and energy imbalance. At 60 d after TAC， there are heart failure， aggravation of lipid metabolism disorder， excessive activation of glucose metabolism， and continuous disorder of pyrimidine metabolism.

Analysis of Animal Models of Hyperthyroidism Based on Characteristics of Clinical Symptoms of Traditional Chinese and Western Medicine / 中国实验方剂学杂志

Hyperthyroidism is a systemic disease characterized by clinical signs and symptoms of hypermetabolism and sympathetic nervous excitement. Based on the clinical diagnostic criteria of traditional Chinese and western medicine for hyperthyroidism，the present study summarized and evaluated animal models of hyperthyroidism. In model evaluation，the models with high coincidence degree in western medicine included the exogenous drug delivery model， the model immune to adenovirus expressing thyrotropin receptor （TSHR），the model immune to nucleic acid， and the model of yin deficiency and effulgent fire syndrome in the disease-syndrome combination. The models with high coincidence degrees in traditional Chinese medicine included the exogenous drug delivery model， the model immune to adenovirus expressing TSHR，and the model of liver-yang ascendant hyperactivity syndrome and the model of yin deficiency and effulgent fire syndrome in the disease-syndrome combination. In light of the coincidence degree， and advantages and disadvantages of traditional Chinese and western medicine，the ideal hyperthyroidism animal models are the exogenous drug delivery model， and the model immune to adenovirus expressing TSHR. In addition to the evaluation of the coincidence degree of animal models of hyperthyroidism in traditional Chinese and western medicine，this study also analyzed the advantages，disadvantages， and problems of the animal models of hyperthyroidism. Most of the animal models of hyperthyroidism were not consistent with the complexity of hyperthyroidism in clinical practice， and standardized and unified syndrome differentiation standards and four-examination information collection standards have not yet been formed. Besides， there have been few studies on the hyperthyroidism model in disease-syndrome combination in traditional Chinese medicine. To make the animal models of hyperthyroidism suitable for clinical practice，the present study proposed the improvement directions of animal models of hyperthyroidism and the necessity of promoting the evaluation system to provide a theoretical basis for the evaluation of the curative effect of Chinese medicine on hyperthyroidism， and exploration of its pharmacological action， as well as the follow-up research on the pathogenesis，prevention， and treatment of hyperthyroidism，which is expected to establish a perfect disease-syndrome model of hyperthyroidism in line with clinical characteristics of traditional Chinese and western medicine.

Function of Autophagy in Development of Chronic Heart Failure Based on Theory of Healthy Qi and Pathogenic Qi / 中国实验方剂学杂志

Chronic heart failure is a serious heart disease with dyspnea and limited activity tolerance as the main clinical manifestations. Autophagy is a self-protection mechanism in eukaryotic cells and plays an important role in the development of heart failure. Appropriately increasing the level of autophagy during the compensated stage of heart failure and timely removal of necrotic myocardial organelles and other harmful garbage can inhibit myocardial hypertrophy to a certain extent，alleviate myocardial remodeling，and delay heart failure. The theory of healthy Qi and pathogenic Qi is an important basic theory for explaining the occurrence of diseases，and struggle between healthy Qi and pathogenic Qi exists in the entire onset of chronic heart failure，which may lead to pathogenic Qi invasion and healthy Qi deficiency. The regulatory effect of autophagy on cardiomyocytes is similar to the theory of healthy Qi and pathogenic Qi in traditional Chinese medicine （TCM）. Autophagy is the body's self-regulatory mechanism for healthy Qi and pathogenic Qi in a dose-effect manner，Specifically，autophagy can only protect the body's cells to a certain extent，and healthy Qi can only take effect within a certain range and degree. To protect the body from external pathogenic factors，excessive or insufficient autophagy may destroy the stability of the body's environment. In this regard，we use the theory of healthy Qi and pathogenic Qi as a starting point to clarify the function of autophagy in the development of chronic heart failure from a macro and micro perspective，and propose adjusting the balance of healthy Qi and pathogenic Qi in the body to regulate the autophagy of cardiomyocytes. The principle of prevention and treatment is expected to lay the foundation for modern research on the function of autophagy in the development of chronic heart failure in TCM，find novel therapy for chronic heart failure at different stages，and provide new insights into the diagnosis and treatment of chronic heart failure.

Animal model analysis of rheumatoid arthritis based on clinical characteristics of Chinese and Western medicine / 中国中药杂志

Rheumatoid arthritis(RA) is an autoimmune disease involving multiple joints bilaterally with symmetrical polyarthritis as the main symptom. The high disability rate of this disease seriously affects the quality of life of patients and even threatens their lives. The establishment of a good animal model is of great significance for the diagnosis and clinical prevention of RA. Based on the clinical characteristics of RA in traditional Chinese and Western medicine, the common animal models of RA were summarized, including drug-induced, gene-related, and syndrome and disease combined models. Joint swelling, pain, redness, nodules, and joint deformity are the main criteria for model evaluation, which have certain differences from the clinical diagnostic criteria of RA. From the perspective of syndrome differentiation, the animal model combining syndrome and disease only simulates the syndrome of traditional Chinese medicine and has no direct causal relationship with the formation of RA. In this paper, we analyzed the advantages and disadvantages of animal models of RA and the coincidence degree of the models with the clinical characteristics and then put forward the corresponding recommendations for the evaluation and improvement of these models, aiming to make the animal models of RA closer to the clinical symptoms and play an important role in the clinical diagnosis and treatment of RA.

Analysis of animal models of hypertension based on characteristics of clinical symptoms of Chinese and western medicine / 中国中药杂志

Hypertension, a cardiovascular disease with main clinical manifestations of dizziness and elevated blood pressure, especially elevated arterial pressure, features high prevalence rate and low control rate, which affects patients' quality of life. Therefore, establishing a good animal model of hypertension is of great significance for its diagnosis and clinical prevention and treatment. Based on the clinical characteristics of hypertension in traditional Chinese and western medicine, this study summarized the advantages and disadvantages of current hypertension animal models: gene-related model, surgery-caused model, drug-induced model, and environment-induced model, and investigated the similarity to the clinical symptoms in traditional Chinese medicine and Western medicine. Among them, spontaneously hypertensive rats, models established with the surgical two-kidney one-clip, one-kidney one-clip, two-kidney two-clip, and abdominal aorta constriction methods, models induced with the drug deoxycorticosterone acetate, and models induced with the high-fat high-purine diet showed symptoms highly similar to the clinical manifestations. Then, the corresponding evaluation and improvement methods of hypertension animal models were proposed. This study provides suggestions for the establishment of hypertension animal model so that the symptoms are more similar to the clinical characteristics of hypertension in traditional Chinese and Western medicine, which is important for the clinical diagnosis and treatment of hypertension.