1.Network Pharmacological Analysis and Experimental Verification of the Mechanism of Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma Drug Pair in the Treatment of Hypertension
Sifan ZHONG ; Yuan TAO ; Songbo LAN ; Jiayu CHANG ; Xia HE ; Jiayue LIN ; Ting ZHANG ; Xu YAN
Traditional Chinese Drug Research & Clinical Pharmacology 2024;35(3):384-393
Objective To investigate the mechanism of Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma drug pair in the treatment of hypertension based on the network pharmacology method and animal experiment verification.Methods(1)TCMSP,BATMAN and TCMIP databases were used to screen the active components and targets of Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma drug pair.The hypertension-related targets were obtained by searching the Drugbank,Genecard,TTD and Disgenet databases.The intersection(common target)of the active component target and the target related to hypertension disease was taken,and the obtained intersection target was the potential target of Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma drug pair for the treatment of hypertension.The active ingredients and their targets of Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma drug pair were imported into Cytoscape 3.9.1 software to construct a'Chinese medicines-active ingredients-targets'network and screen key active ingredients.The protein-protein interaction(PPI)network of potential targets was constructed to screen potential core targets.The Metascape platform was used to analyze the GO function and KEGG pathway enrichment of potential targets.The key active components and potential core targets were selected for molecular docking verification.(2)Thirty male spontaneously hypertensive rats(SHR)were randomly divided into model group,western medicine group(Candesartan Cilexetil,0.72 mg·kg-1)and low-,medium-and high-dose groups of Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma(2.25,4.50,9.00 g·kg-1).Another male WKY rats were selected as blank group,with 6 rats in each group,once a day for 8 weeks.The systolic blood pressure of rat tail artery was detected before administration and 2,4,6 and 8 weeks after drug intervention.The pathological changes of thoracic aorta were observed by HE staining.The protein expression levels of GRP78,CHOP and Caspase-12 in aorta abdominalis were detected by Western Blot.Results(1)A total of 83 active components of Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma were obtained,and 158 potential targets(intersection targets)for the treatment of hypertension were screened out.Five key active ingredients:p-hydroxybenzoic acid,4-hydroxybenzylamine,tanshinone I,tanshinone,γ-sitosterol;6 potential core targets:IL6,TNF,CASP3,JUN,PTGS2,IL1B;GO functional enrichment analysis obtained 1 826 biological process items,89 cell component items,and 199 molecular function items.KEGG pathway enrichment analysis obtained 186 pathways,mainly involving neuroactive ligand-receptor interaction,calcium signaling pathway,inflammatory response(such as TNF and MAPK signaling pathway),vascular protection(such as HIF-1 and cAMP signaling pathway),oxidative stress(such as PI3K-Akt signaling pathway)and other signaling pathways.Tanshinone I and tanshinone had strong binding force to 6 potential core targets,and γ-sitosterol had strong binding force to IL6,CASP3,JUN,PTGS2 and IL1B.(2)Compared with the blank group,the systolic blood pressure of the model group was significantly increased(P<0.01).The thoracic aortic endothelial injury was obvious,the endothelial cell morphology was abnormal,swelling and exfoliated cells could be seen,the intima of the tissue was disordered,the intima structure was incomplete,and the intima was thickened.The protein expressions of GRP78,CHOP and Caspase-12 in abdominal aorta were significantly increased(P<0.01).Compared with the model group,the systolic blood pressure of the rats in the administration group was significantly decreased(P<0.01);the injury of thoracic aorta was alleviated,and the morphology,intima structure and thickness of endothelial cells were improved to varying degrees.The protein expressions of GRP78,CHOP and Caspase-12 in abdominal aorta were significantly decreased(P<0.01).Conclusion Gastrodiae Rhizoma-Salviae Miltiorrhizae Radix et Rhizoma drug pair may act on core targets such as IL6,TNF,CASP3,JUN,PTGS2,and IL1B through key active components such as p-hydroxybenzoic acid,tanshinone,and γ-sitosterol,and regulate key signaling pathways such as TNF signaling pathway,MAPK signaling pathway,PI3K-Akt signaling pathway,and PERK signaling pathway to improve vascular endothelial dysfunction,inhibit endoplasmic reticulum stress,and lower blood pressure.
2.Experience of National TCM Master Xiong Jibai in Treating Pulmonary Nodules Based on"Body Fluids and Blood Stasis Mixing"
Jiayu CHANG ; Xia HE ; Sifan ZHONG ; Jiayue LIN ; Songbo LAN ; Ting ZHANG ; Xu YAN ; Jibai XIONG
Chinese Journal of Information on Traditional Chinese Medicine 2024;31(4):175-178
This article summarized the experience of Professor Xiong Jibai,a national TCM master,in treating pulmonary nodules based on the theory of"body fluids and blood stasis mixing"in Huang Di Nei Jing.Professor Xiong Jibai believes that the basic pathogenesis of pulmonary nodules is that"body fluids and blood stasis mixing"accumulate in lung collaterals,and the fundamental pathological factor is phlegm and blood stasis.Xiong's treatment is based on dissipating phlegm and activating qi,activating blood circulation and resolving masses,paying attention to syndrome differentiation and treatment,examining syndromes and seeking causes,flexibly selecting prescriptions and treating both symptoms and root causes;attaching importance to maintaining healthy qi,preventing both illness and change,and preventing recovery after illness.Clinical medical records were attached to prove the clinical thinking and medication characteristics.
3.Mechanism of the immediate analgesic effect of the"three methods and three points"tuina technique based on the IL-17F/IL-17RC signaling pathway and M1 microglia
Jinping CHEN ; Zhifeng LIU ; Tianyuan YU ; Hourong WANG ; Yingqi ZHANG ; Qian GUAN ; Yajing XU ; Zhenjie YANG ; Chula SA ; Runlong ZHANG ; Hanyu ZHANG ; Jiayue LIU ; Jiawei SUN
Journal of Beijing University of Traditional Chinese Medicine 2024;47(1):116-123
Objective By observing the effects of"three methods and three points"tuina technique on the expression of interleukin-17F(IL-17F),interleukin-17 receptor C(IL-17RC),activator 1 of nuclear transcription factor-κB(Act1),tumour necrosis factor receptor-associated factor 6(TRAF6)and M1 microglial cell expression in the spinal dorsal horn of rats with mild chronic compressive injury(minor CCI)model,we explored the immediate analgesic mechanism of tuina on peripheral neuropathic pain(pNP).Methods Thirty-six SD rats were divided into the sham group,the model group and the tuina group according to the random number method,twelve rats in each group,and the minor CCI model was replicated by ligating the right sciatic nerve.The rats in the tuina group were subjected to pointing,plucking and kneading at the BL37,BL57 and GB34 points on the affected side using a tuina simulator,while the sham group and the model group were only grasped and restrained,and were intervened for one time.The mechanical pain test and cold plate test were used to evaluate the response of rats to mechanical stimulation and cold stimulation after immediate intervention.The protein expression of IL-17F and TRAF6 in the spinal dorsal horn of rats in each group was detected by Western blotting.The mRNA expression of IL-17F,IL-17RC,Act1 and TRAF6 in the spinal dorsal horn of rats in each group was detected by real-time PCR.The average fluorescence intensity of M1 microglia in the spinal dorsal horn of rats in each group was detected by immunofluorescence.Results Behavioral results showed that before intervention,compared with the sham group,paw mechanical withdraw threshold(PMWT)decreased and cold sensitivity threshold(CST)increased in the model group and the tuina group;after tuina intervention,PMWT in the tuina group was increased,and CST was decreased compared with the model group;after intervention,PMWT in the tuina group was increased,while CST was decreased(P<0.05).RT-PCR results showed that compared with the sham group,mRNA expression levels of IL-17F,IL-17RC,TRAF6 and Act1 in the spinal dorsal horn of the model group were increased;compared with model group,the mRNA expression levels of above indexes in the tuina group were decreased(P<0.05).Western boltting results showed that compared with the sham group,the expression levels of IL-17F and TRAF6 protein in the spinal dorsal horn of the model group were increased;compared with the model group,the expression levels of IL-17F and TRAF6 protein in the tuina group decreased(P<O.05).Immunofluorescence results showed that the mean fluorescence intensity of CD40 in the spinal dorsal horn of model group was enhanced compared with the sham group;compared with the model group,the mean fluorescence intensity of CD40 in the tuina group was decreased(P<0.05).Conclusion The"three methods and three points"tuina technique can produce immediate analgesia by inhibiting the expression of IL-17F,IL-17RC,Act1,TRAF6 and the activation of M1 microglia in the dorsal horn of the spinal cord after one intervention.
4.REDH: A database of RNA editome in hematopoietic differentiation and malignancy
Jiayue XU ; Jiahuan HE ; Jiabin YANG ; Fengjiao WANG ; Yue HUO ; Yuehong GUO ; Yanmin SI ; Yufeng GAO ; Fang WANG ; Hui CHENG ; Tao CHENG ; Jia YU ; Xiaoshuang WANG ; Yanni MA
Chinese Medical Journal 2024;137(3):283-293
Background::The conversion of adenosine (A) to inosine (I) through deamination is the prevailing form of RNA editing, impacting numerous nuclear and cytoplasmic transcripts across various eukaryotic species. Millions of high-confidence RNA editing sites have been identified and integrated into various RNA databases, providing a convenient platform for the rapid identification of key drivers of cancer and potential therapeutic targets. However, the available database for integration of RNA editing in hematopoietic cells and hematopoietic malignancies is still lacking.Methods::We downloaded RNA sequencing (RNA-seq) data of 29 leukemia patients and 19 healthy donors from National Center for Biotechnology Information (NCBI) Gene Expression Omnibus (GEO) database, and RNA-seq data of 12 mouse hematopoietic cell populations obtained from our previous research were also used. We performed sequence alignment, identified RNA editing sites, and obtained characteristic editing sites related to normal hematopoietic development and abnormal editing sites associated with hematologic diseases.Results::We established a new database, "REDH", represents RNA editome in hematopoietic differentiation and malignancy. REDH is a curated database of associations between RNA editome and hematopoiesis. REDH integrates 30,796 editing sites from 12 murine adult hematopoietic cell populations and systematically characterizes more than 400,000 edited events in malignant hematopoietic samples from 48 cohorts (human). Through the Differentiation, Disease, Enrichment, and knowledge modules, each A-to-I editing site is systematically integrated, including its distribution throughout the genome, its clinical information (human sample), and functional editing sites under physiological and pathological conditions. Furthermore, REDH compares the similarities and differences of editing sites between different hematologic malignancies and healthy control.Conclusions::REDH is accessible at http://www.redhdatabase.com/. This user-friendly database would aid in understanding the mechanisms of RNA editing in hematopoietic differentiation and malignancies. It provides a set of data related to the maintenance of hematopoietic homeostasis and identifying potential therapeutic targets in malignancies.
5.Outcomes of idiopathic pulmonary fibrosis patients with high body mass index undergoing extracorporeal membrane oxygenation support
Jing TIAN ; Yan DONG ; Tao ZHOU ; Jiayue ZHANG ; Hongyang XU
Chinese Critical Care Medicine 2024;36(5):538-542
Objective:To evaluate the extracorporeal membrane oxygenation (ECMO) related outcomes during hospitalization during the intensive care unit (ICU) in idiopathic pulmonary fibrosis (IPF) patients with high body mass index (BMI, >25 kg/m 2) undergoing lung transplantation with ECMO support. Methods:A retrospective observational study was conducted. IPF patients who received ECMO during lung transplantation admitted to the Affiliated Wuxi People's Hospital of Nanjing Medical University from 2019 to 2020 were enrolled. Preoperative indicators including, demographics, comorbidities, arterial blood gas, and laboratory indicators; intraoperative indicators, such as lung lobe volume reduction, surgical type, surgical time, cold ischemia time, blood loss and transfusion volume; immediate indicators upon admission to the ICU, such as blood gas analysis and laboratory indicators; ECMO related outcomes, such as ECMO mode, ECMO support time, ECMO related complications (bleeding at the catheterization site, intraductal thrombosis, lower limb ischemia), and the length of ICU stay, duration of mechanical ventilation, and 30-day survival rate were collected. According to BMI, patients were divided into three groups: light weight group (BMI < 18.5 kg/m 2), normal weight group (BMI 18.5-24.9 kg/m 2), and overweight group (BMI ≥ 25.0 kg/m 2). Mainly to compare the relevant outcomes of ECMO among patients during ICU. Results:A total of 114 IPF patients who received ECMO support during lung transplantation were collected, including 23 cases in the light weight group, 63 cases in the normal weight group, and 28 cases in the overweight group. Compared with patients with underweight and normal weight, overweight patients were more likely to have hypertension (46.4% vs. 8.7%, 23.8%, P < 0.01) and coronary heart disease (32.1% vs. 4.3%, 20.6%, P < 0.05) before surgery, which was consistent with international guidelines for obesity. Other clinical data (preoperative, intraoperative, ICU characteristics) showed no statistically significant differences and were comparable. There was no statistically significant difference in terms of ECMO related outcomes, such as ECMO related complications [veno-venous (V-V) mode: 78.3%, 77.8%, 78.6%, veno-arterial (V-A) mode: 21.7%, 22.2%, 21.4%], ECMO support time (hours: 61.70±20.03, 44.57±5.76, 41.77±7.26), ECMO related complications (bleeding at the catheterization site: 4.3%, 7.9%, 14.3%; intraductal thrombosis: 8.7%, 12.7%, 17.9%; lower limb ischemia: 8.7%, 12.7%, 14.3%), and the length of ICU stay (days: 11±3, 7±1, 9±1), duration of mechanical ventilation [days: 2 (2, 11), 2 (2, 6), 3 (2, 8)] among the light weight group, normal weight group, and overweight group (all P > 0.05). Kaplan-Meier survival curve analysis showed that there was no statistically significant difference in the 30-day cumulative survival rate among the three groups (Log-Rank test: χ2 = 0.919, P = 0.632). Conclusions:High BMI does not worsen ECMO-related outcomes or adversely affect early prognosis in IPF patients undergoing lung transplantation. BMI as a single parameter should not be a contraindication for the use of ECMO in lung transplantation surgery for IPF patients.
6.Therapeutic Effect of Compound Wufengcao Liquid on Tuberculous Ulcer from Perspective of Macrophages
Jiayan QIAN ; Zihui HUANG ; Jiayue SUN ; Feiyun XU ; Yuling WANG ; Yang YU
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(4):86-96
ObjectiveTo explore the clinical efficacy of compound Wufengcao liquid (CWL) on tuberculous ulcer and the influence on macrophage polarization. Method① Clinical experiment: A total of 145 patients with tuberculous ulcer who were treated in Nanjing Integrated Traditional Chinese and Western Medicine Hospital were randomized into observation group, control group Ⅰ, and control group Ⅱ according to the random number table method. In addition to the basic anti-tuberculosis chemotherapy, CWL, Kangfuxin liquid, and isoniazid solution (local external application) were respectively used in the observation group, control group Ⅰ, and control group Ⅱ. The treatment lasted 4 weeks for each group. The total effective rate in wound healing, traditional Chinese medicine(TCM) syndrome score, and histopathological morphology of wound were observed and the expression of inducible nitric oxide synthase (iNOS) and arginase-1 (Arg-1) in wound tissue was measured. ② Cell experiment: RAW264.7 cells were cultured in DMEM (10% fetal bovine serum, 1% double-antibody solution) in a cell incubator (37 °C, 5% CO2). Phorbol 12-myristate 13-acetate (PMA) was used to induce the differentiation of RAW264.7 cells into macrophages. Lipopolysaccharide (LPS) was employed to stimulate polarization of macrophages into M1 type and interleukin-4 (IL-4) to induce the polarization into M2 type. Kangfuxin solution, isoniazid solution, and CWL were respectively applied to the above cell model for 36 h. The cell supernatant was collected and centrifuged. Western blot was used to detect the protein expression of tumor necrosis factor-α (TNF-α), transforming growth factor-β (TGF-β), iNOS, and Arg-1, and flow cytometry (FCM) to detect the expression of CD86 and CD206. Result①Clinical experiment: The total effective rate in the CWL group [98.0% (48/49)] was higher than that in the control group Ⅰ [87.5% (42/48), χ2=3.962, P<0.05] and control group Ⅱ [83.3% (40/48), χ2=6.162, P<0.05]. After 28 days of treatment, compared with control group Ⅰ and control group Ⅱ, CWL decreased the TCM syndrome score (P<0.05) and obviously improved the histopathological morphology of the wound. Immunohistochemistry results showed that the iNOS expression in local focus tissue was lower (P<0.05) and the expression of Arg-1 was higher (P<0.05, P<0.01) in the CWL group than in the control group Ⅰ and control group Ⅱ after 28 days of treatment. ② Cell experiment: Western blot assay showed that the expression of iNOS and TNF-α in LPS group increased compared with that in the M0 group (P<0.01) and the expression in the LPS+ isoniazid group, LPS+ Kangfuxin group, and LPS+CWL group was lower than that in the LPS group (P<0.05). The expression of iNOS in LPS+Kangfuxin group and LPS+ CWL group was lower than that in the LPS+isoniazid group (P<0.05, P<0.01), and the expression of TNF-α in LPS+ CWL group was lower than that in LPS+isoniazid group (P<0.01). The expression of TNF-α in LPS+ CWL group decreased compared with that in the LPS+ Kangfuxin group (P<0.05). The expression of Arg-1 and TGF-β in IL-4 group was higher than that in the M0 group (P<0.01), and the expression in the IL-4+isoniazid group, IL-4+Kangfuxin group, and IL-4+ CWL group was higher than that in the IL-4 group (P<0.05). The expression of Arg-1 and TGF-β in the IL-4+ Kangfuxin group and IL-4+CWL group was higher than that in the IL-4+isoniazid group (P<0.05, P<0.01), and the expression was higher in the IL-4+CWL group than in the IL-4+Kangfuxin group (P<0.05, P<0.01). The FCM result showed that the expression of CD86 and CD206 in LPS group and IL-4 group was higher than that in M0 group (P<0.01). CD86 expression in LPS+isoniazid group, LPS+ Kangfuxin group, and LPS+CWL group was lower than that in the LPS group (P<0.01). The expression of CD86 in LPS+Kangfuxin group and LPS+ CWL group increased compared with that in the LPS+isoniazid group (P<0.01), and the expression was higher in the LPS+ CWL group than in the LPS+Kangfuxin group (P<0.01). CD206 expression in IL-4+ isoniazid group, IL-4+Kangfuxin liquor group, and IL-4+ CWL group was increased compared with that in the IL-4 group (P<0.01). CD206 expression in IL-4+Kangfuxin liquid group and IL-4+ CWL group was decreased compared with that in the IL-4+isoniazid group (P<0.01). CD206 expression in IL-4+CWL group was lower than that in the IL-4+ Kangfuxin group (P<0.05). ConclusionCWL can promote the healing of tuberculous ulcers, and the mechanism is that it inhibits the expression of iNOS, TNF-α, and CD86 and promotes the expression of Arg-1, TGF-β, and CD206, thereby regulating M1/M2 polarization balance.
7.Projected burden of stroke in China through 2050.
Minghong YAO ; Yan REN ; Yulong JIA ; Jiayue XU ; Yuning WANG ; Kang ZOU ; Xin SUN
Chinese Medical Journal 2023;136(13):1598-1605
BACKGROUND:
Stroke is the leading cause of death in China, and predicting the stroke burden could provide essential information guiding the setting of medium- and long-term health policies and priorities. The study aimed to project trends associated with stroke burden in China through 2050, not only in terms of incidence and mortality but also for prevalence and disability-adjusted life years (DALYs).
METHODS:
Data on stroke rates in incidence, prevalence, deaths, and DALYs in China between 1990 and 2019 were obtained from a recent Global Burden of Disease study. Demographic-specific trends in rates over time were estimated using three models: the loglinear model, the Lee-Carter model, and a functional time series model. The mean absolute percentage error and the root mean squared error were used for model selection. Projections up to 2050 were estimated using the best fitting model. United Nations population data were used to project the absolute numbers through 2050.
RESULTS:
From 2019 to 2050, the crude rates for all measures of the stroke burden are projected to increase continuously among both men and women. We project that compared with those in 2019, the incidence, prevalence, deaths, and DALYs because of stroke in China in 2050 will increase by 55.58%, 119.16%, 72.15%, and 20.04%, respectively; the corresponding increases in number were 2.19, 34.27, 1.58, and 9.21 million. The age-standardized rate is projected to substantially decline for incidence (8.94%), death (40.37%), and DALYs (43.47%), but the age-standardized prevalence rate is predicted to increase by 10.82%. By 2050, the burden of stroke among the population aged ≥65 years will increase significantly: by 104.70% for incidence, by 218.48% for prevalence, by 100.00% for death, and by 58.93% for DALYs.
CONCLUSIONS
With the aging population in China increasing over the next three decades, the burden of stroke will be markedly increased. Continuous efforts are needed to improve stroke health care and secondary prevention, especially for older adults.
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8.Study on liver dysfunction induced by methimazole and propylthiouracil for the treatment of hyperthyroidism
Chinese Journal of Endocrine Surgery 2023;17(4):508-510
Methimazole (MMI) and propylthiouracil (PTU) are the only clinical antithyroid drugs,with definite efficacy,but a high incidence of adverse reactions.The Food and Drug Administration (FDA) warns that PTU can cause fatal explosive hepatocyte necrosis, but other research evidence has shown that MMI is as common as PTU in causing acute hepatocyte damage.In this study, we reported that in 6631 patients, after eliminating confounding factors such as demographic characteristics, initial daily dose and combined medication, there was no statistically significant difference in the proportion of liver injury between the MMI group and the PTU group ( P=0.762), the influencing factors causing abnormal liver function by two drugs were also analyzed.
9. Effects of scacia honey on serum uric acid level and renal injury in rats
Xiuhe XU ; Xiaoli HE ; Jiashun ZHOU ; Lizhu PAN ; Zhuojun ZHOU ; Jiayue LI ; Guiqi ZHU ; Caixia WANG ; Wei YUAN
Chinese Journal of Clinical Pharmacology and Therapeutics 2023;28(7):743-750
AIM: To observe the effect ofacacia honey (AH) on serum uric acid level and renal function in potassium oxonate modelrats after drinking AH aqueous solution. METHODS: Sixty male SD rats were selected and randomly divided into control group (CON group), potassium oxonate model group (OA model group), 10% fructose group (10% F group) and different concentration honey groups (25%, 12.5% and 6.25% AH groups). All rats were fed with normal diet.The rats in CON group were subcutaneously injected with 5% sodium carboxymethyl cellulose (CMC-Na) solution and drunk sterile water every day, while rats in other groups were injected with 100 mg / kg OA solution suspended with 5% CMC-Na subcutaneouslyand drunksterile water orfructose solution or AH solution of different concentrations every day. Before and during the 4-week test, rats were weighed and blood was taken once a week. At the end of test, urine and feces specimens or kidney tissues were collected and blood was taken from the abdominal aorta. The uric acid content in blood, urine, and feces and the levels of serum creatinine (Cre) and blood urea nitrogen (BUN) or inflammatory factors in kidney tissues were measured. Renal function and histology were evaluated. RESULTS: Compared with CON group, AH could significantly reduce the body weight of rats (P<0.05), increase the kidney organ coefficient, the levels of serum uric acid, and uric acid in urine or feces, and reduce the level of fecal uric acid (FUA) in rats. AH can down regulate the level of tumor necrosis factor alpha (TNF-a) (P< 0.05) and up regulate the expression of monocyte chemoattractant protein 1 (MCP-1) and transforming growth factor β - 1 (TGF - β1) in rats kidneys; AH can cause slight to mild dilatation of renal tubules and mild to moderate basophilic lesions of renal rubules in rat kidney in a dose dependent manner. CONCLUSION: In the doses rang of present study, AH can cause hyperuricemia, renal tubular dilatation and basophilic lesions, and lead to renal function damage in rats.
10.The special consideration for using the real-world data as external control in clinical evaluation
Yuning WANG ; Minghong YAO ; Yan REN ; Jiayue XU ; Yulong JIA ; Kai LIN ; Yaohua LI ; Chunmin WEI ; Xin SUN
Chinese Journal of Epidemiology 2023;44(2):335-340
Randomized controlled trials (RCT) have long been considered the gold standard for assessing clinical efficacy. However, RCT are inappropriate for some diseases due to related ethical issues and costs, such as rare diseases that are seriously life-threatening but without adequate treatment. Using real world data (RWD) as external control for RCT could make recruitment less complicated and reduce time and cost. This paper introduces common application scenarios, data sources, study design, basic principles, and statistical methods of RWD as an external control based on the latest guidelines related to RWD and combined with our team's previous research experience. This study could provide references for scholars and sponsors who want to conduct RWD research.

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