|Year : 2020 | Volume
| Issue : 3 | Page : 276-283
Systematic review and meta-analysis of shenfu injection on treating acute exacerbation of chronic obstructive pulmonary disease
Jian-Guo Lin1, Jian Lyu2, Meng-Hua Sun2, Xing Liao2, Yan-Ming Xie2
1 Institute of Basic Research in Clinical Medicine; Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, China
2 Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, China
|Date of Submission||25-Dec-2019|
|Date of Acceptance||19-Mar-2020|
|Date of Web Publication||05-Aug-2020|
Prof. Yan-Ming Xie
Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing 100700
Source of Support: None, Conflict of Interest: None
The objective of the study was to systematically evaluate the efficacy and safety of Shenfu injection in the treatment of patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). A total of 15 randomized controlled trials involving 1198 patients were included. The results of meta-analysis showed that compared with the control group, the experimental group can improve the total clinical effective rate in AECOPD patients (relative risk = 1.15, 95% confidence interval [CI] [1.09, 1.21], P < 0.000 01), improve the pulmonary function levels: forced expiratory volume in one second (FEV1) (standardized mean difference = 1.88, 95% CI [0.89, 2.88], P = 0.000 2) and the FEV1/forced vital capacity (FVC) ratio (FEV1/FVC) (mean difference [MD] = 3.96, 95% CI [2.74, 5.19], P < 0.000 01); improve the arterial blood oxygen partial pressure (MD = 6.03, 95% CI [4.58, 7.48], P < 0.000 01), and reduce the arterial blood partial pressure of carbon dioxide (MD = −4.59, 95% CI [−6.91, −2.26], P = 0.000 01), and the white blood cell count in pulmonary infection may be improved (MD = −1.16, 95% CI [−1.63, −0.68], P < 0.000 01). The study showed that the efficacy of experimental group in the treatment of AECOPD is better than control group. Due to the limitation of the number and quality of included studies, this conclusion needs more high quality studies to confirm.
Keywords: Acute exacerbation of chronic obstructive pulmonary disease, meta-analysis, Shenfu injection, systematic review
|How to cite this article:|
Lin JG, Lyu J, Sun MH, Liao X, Xie YM. Systematic review and meta-analysis of shenfu injection on treating acute exacerbation of chronic obstructive pulmonary disease. World J Tradit Chin Med 2020;6:276-83
|How to cite this URL:|
Lin JG, Lyu J, Sun MH, Liao X, Xie YM. Systematic review and meta-analysis of shenfu injection on treating acute exacerbation of chronic obstructive pulmonary disease. World J Tradit Chin Med [serial online] 2020 [cited 2020 Sep 24];6:276-83. Available from: http://www.wjtcm.net/text.asp?2020/6/3/276/291402
| Introduction|| |
Chronic obstructive pulmonary disease (COPD) is a common, preventable, and treatable disease, which is characterized by persistent respiratory symptoms and airflow restriction due to exposure to toxic particles or gas. Acute exacerbation of COPD (AECOPD) refers to the continuous deterioration of the patient's condition beyond daily life and the need to change the basic medication. Usually, it is manifested as short-term cough, expectoration, shortness of breath and/or wheezing exacerbation, increased sputum volume, purulent or mucopurulent, and can be accompanied by fever and other inflammation. The prevalence of COPD was 8.6% in adults aged 20 and over, 13.7% in people aged 40 and over, and over 27% in people aged 60 and over. The total number of COPD patients nationwide was 99.9 million or about 100 million. COPD is currently the third leading cause of death in the world and is expected to be the third leading cause of death and the fifth largest economic burden in 2020. The morbidity and mortality of COPD in China are increasing year by year, and the situation of prevention and treatment is grim.
COPD belongs to the category of “lung distension,” “asthma syndrome,” and “cough” in Chinese medicine. Evidence indicates that the occurrence, treatment, and prognosis of AECOPD are related to cold drinking, phlegm–dampness, deficiency syndrome, and blood stasis. Clinical treatment of AECOPD with Chinese medicine on the basis of routine Western medicine treatment can significantly improve the curative effect, shorten the course of disease, and reduce complications, in which the beneficial Yang-warming drugs improve lung function, reduce symptoms, signs, and so on have a good effect.,, Shenfu injection (SFI) is prepared from Shenfu decoction (red ginseng and black aconite) of Complete Effective Prescriptions for Women's Diseases by modern technology. The main components of SFI are ginsenoside and aconite alkaloids, which have the effects of restoring yang, relieving adverse effects, invigorating qi, and strengthening immunity, and have good effects on improving hemodynamics, anti-inflammation, anti-coagulation, and anti-apoptosis, improving metabolism, and enhancing immunity. In recent years, there have been many clinical studies of SFI in the treatment of AECOPD, but there is no systematic review and analysis related to it because of its single report, small sample size, and lack of rigorous persuasion. Therefore, according to the method of systematic evaluation, this study conducted a systematic evaluation and meta-analysis on the randomized controlled trials (RCTs) of SFI in the treatment of AECOPD, providing evidence-based medical evidence for clinical practice.
| Data and Methods|| |
(1) Type of study: SFI in the treatment of AECOPD RCT, blind method, is not limited. (2) Subjects: Patients who complied with the diagnostic criteria of AECOPD. Diagnostic criteria may refer to Global Initiative for Chronic Obstructive Lung Disease (GOLD). Guidelines for the diagnosis and treatment of COPD, or other recognized diagnostic criteria at home and abroad. (3) Intervention: Experimental group: SFI combined with Western medicine treatment, the treatment dose, and the course of treatment was not limited. Control group: Western medicine routine treatment: Western medicine routine treatment for anti-infection, asthma, expectoration, routine continuous low-flow oxygen inhalation, and other comprehensive treatment. (4) Exclusion criteria: Repeated literature, false or incomplete research data, unable to get a full text, and patients with other organ complications.
Main outcome measures were the total clinical effective rate; secondary outcome indicators were pulmonary function indicators, including the forced expiratory volume in one second (FEV1) and the FEV1/forced vital capacity (FVC) ratio (FEV1/FVC); blood gas analysis included arterial blood partial pressure of oxygen (PaO2) and arterial blood partial pressure of carbon dioxide (PaCO2); and pulmonary infection indicators were white blood cell count (WBC) and adverse reactions.
A total of seven databases including VIP Database for Chinese Technical Periodicals (VIP), China National Knowledge Infrastructure (CNKI), Wanfang Data, Chinese Biomedical Literature Database (CBM), Cochrane Library, Medline, and EMbase were searched by computer. Retrieval time of each database ranged from the earliest date of the database to April 2019. The Chinese keywords were “Shenfu injection,” “chronic obstructive pulmonary disease,” “chronic obstructive pulmonary,” and “COPD.” In English, subject words and free words are used for retrieval. The keywords are “Shenfu Injection,” “COPD,” and “chronic obstructive pulmonary disease.” The comprehensive retrieval of subject words and free words is carried out in accordance with the characteristics of the database. Take CNKI retrieval strategy as an example, CNKI: SU = (“Shenfu Injection” + “Shenfu”) and SU = (chronic obstructive + “COPD” + “chronic obstructive pulmonary disease”).
Literature screening and data extraction
The literature selection, data extraction, and literature quality evaluation were carried out independently by two persons, and the literature that is difficult to judge was evaluated through discussion between the two parties or intervention of a third party. During the screening, the reasons for excluding the literature were judged and recorded according to the way of reading the abstract and the full text. The basic information extraction table of literature was drawn up during data extraction, including researchers, years of publication, diagnostic criteria, number of cases of the experimental group and the control group, age and sex composition, intervention measures, outcome indicators, adverse reactions, and randomized methods.
Evaluation of the quality of the studies included
According to the risk bias assessment tool in Cochrane Reviewers Handbook 5.1, the quality of the included literature was evaluated in the following seven aspects: random sequence generation, random allocation hiding, double blindness of implementers and subjects, blindness in outcome assessment, the integrity of outcome data, selective reporting of results, and other biases. Finally, the literature is evaluated one by one and judged according to the results of “low risk,” “high risk,” and “uncertainty.”
RevMan 5.3 software provided by Cochrane Collaboration Network was used for the statistical analysis. Relative risk (RR) was used to express the effect statistics for the counting data. When the measurement method or unit of the effect of the same intervention is exactly the same, the mean difference (MD) is used to represent the effect statistics. When different measurement methods or units are used for the effect of the same intervention, the standardized MD (SMD) is used for representing the effect statistics, and both use the effect value and 95% confidence interval (CI) to represent the combined result. Q-test was used for the heterogeneity test. If I2≤ 50%, the statistical homogeneity was considered good. A fixed-effect model was used. If I2 > 50%, the statistical heterogeneity was large. Sensitivity analysis was first carried out to find the cause of heterogeneity. Random effect model was used when the clinical and methodological heterogeneity was not large, and the results were expressed by the forest plot. If the study is not appropriate for a meta-analysis, a descriptive analysis is performed. If more than ten papers were included in the outcome index, a funnel plot was used to analyze whether there was publication bias.
| Results|| |
Retrieval and filtering results
A total of 263 related papers were initially retrieved and 97 papers remained after NoteExpress (NE) software and manual duplicate checking. A total of 21 papers were excluded after reading the abstract, 61 papers were excluded after reading the full text, and finally, 15 papers were included in the RCT, as shown in [Figure 1].
Basic characteristics and quality evaluation of the study
A total of 1198 patients were enrolled in 15 studies,,,,,,,,,,,,,,, including 607 in the experimental group and 591 in the control group. The basic characteristics of the included studies are shown in [Table 1]. Of the included studies, five studies,,,, used random number tables, one study used simple random sampling, three studies,, were randomly assigned in order of attendance, and the remaining six studies did not explicitly mention specific random allocation methods, and one study had dropouts and the absence of data was unlikely to affect the true outcome. The quality of the included literature was assessed using the Risk Bias Assessment Tool in Cochrane Reviewers Handbook 5.1, as shown in [Figure 2].
Total clinical effective rate
A total of 14 studies,,,,,,,,,,,,, involving 1112 patients reported the comparison of total clinical effective rate and heterogeneity test results (I2= 0%, P = 1. 00), using fixed-effect model. The results showed that the experimental group was superior to the control group in improving the total clinical effective rate of AECOPD (RR = 1.15, 95% CI [1.09, 1.21], P < 0.000 01), as shown in [Figure 3].
Comparison of forced expiratory volume in one second
A total of 6 study,,,,, reported that comparison of FEV1, and heterogeneity test results (I2= 95%, P < 0.000 01), using random-effect model, because of the difference of SD more than 10 times, using SMD. The results showed that experimental group was better than control group in its ability to increase FEV1(SMD = 1.88, 95% CI [0.89, 2.88], P = 0.000 2), as shown [Figure 4]. Since I2 = 95% is comparatively large, a sensitivity analysis was performed, and it was found that the SD value in the FEV1 value in the Zhang study differed from other studies by dozens of times. Considering that heterogeneity may be related to different statistical methods or uneven conventional intervention, this study was excluded, the heterogeneity test results (I2 = 41%, P = 0.15), a fixed effect model was used. The conclusion is the same as before (MD = 4.16, 95% CI [3.06, 5.25], P <0.000 01).
Comparison of forced expiratory volume in one second/forced vital capacity
A total of six studies,,,,, reported the comparison of FEV1/FVC, excluding the Zhang Qianli study and including five studies,,,,, and heterogeneity test results (I2 = 33%, P = 0.20), using a fixed-effect model. The results show that experimental group is better than control group in improving FEV1/FVC (MD = 3.96, 95% CI [2.74, 5.19], P < 0.000 01), as shown [Figure 5].
Blood gas analysis
Comparison of partial pressure of oxygen
A total of 6 studies reported PaO2 comparison and heterogeneity test results (I2 = 40%, P = 0. 14). Fixed effect model was used. The results showed that experimental group was superior to control in improving PaO2(MD = 6. 03, 95% CI [4.58, 7.48], P < 0.000 01), as shown [Figure 6].
Comparison of partial pressure of carbon dioxide
A total of six studies reported PaCO2 comparison and heterogeneity test results (I2 = 88%, P < 0.000 01), using a randomized effect model. The results showed that experimental group was superior to control group in reducing PaCO2(MD = −4. 59, 95% CI [−6.91, −2.26], P = 0. 000 1), as shown in [Figure 7].
|Figure 7: Meta-analysis of partial pressure of carbon dioxide of two groups|
Click here to view
Indicators of pulmonary infection
A total of two studies, reported WBC comparison and heterogeneity test results (I2 = 0%, P = 0. 72), using a fixed-effect model. The results showed that experimental group was superior to control group in improving pulmonary infection indicators (MD = -1. 16, 95% CI [-1.63,-0.68], P < 0.000 01), as shown [Figure 8].
The sensitivity analysis of clinical total effective rate, pulmonary function, and blood gas analysis indexes was carried out by changing statistical model. The results showed that the evaluation results of the two statistical models were similar, indicating that the meta results were basically robust, as shown in [Table 2].
Publication of bias funnel diagram
The total clinical response rate of the 15 included studies was inverted in funnel plots. The results showed that the inverted funnel was asymmetrical from left to right, suggesting the possibility of publication bias, which may be due to the low quality of the included studies, small sample effect, and partial negative results not yet published or not yet published, as shown in [Figure 9].
Of the 15 studies included, three,, reported adverse events and one study reported no adverse events. Two adverse events reported in the Jin Wei study, all of which occurred in the treatment group but were not specified. Chi Yong sheng study reported one case of an adverse reaction, which occurred in the treatment group, with slight skin pruritus and self-relief after stopping transfusion, while no adverse reaction was found in the control group. Zi-Ran Wang study reported four adverse reactions, all of them occurred in the treatment group, three cases had dry mouth, and one case had irritability, but the symptoms were mild, the patients were tolerable, no special treatment was given, and the symptoms disappeared after the treatment. Yali's and Baoyong reported no adverse reactions.
| Discussion|| |
Validity and theoretical analysis
AECOPD is commonly observed in autumn and winter. Most of AECOPD patients were old and insufficiency of yang qi. Deficiency of lung-yang, difficult to assist the heart blood flow. Deficiency of spleen-yang, phlegm-fluid retention is born out. Deficiency of kidney-yang leads to decline of vital gate fire. These reasons induce the disease to continue to attack and circulate repeatedly. More deficiency of yang qi, the stronger the pathogenic qi, and form a vicious circle.
SFI is mainly used for the treatment of syndrome of sudden yang collapse (infectious, hemorrhagic, anhydrous shock, etc.) It is composed of Radix Ginseng Rubra and Radix Aconiti Lateralis. Preparata. Radix Ginseng Rubra is a cooked product of ginseng. It has sweet taste, slight bitterness, warm temperature, belonging to the spleen, lung, heart, and kidney meridians, and has the effects of invigorating vital energy, restoring pulse and removing blood stasis, and has the effects of anti-tumor, anti-aging, anti-fatigue, improving the cardiovascular and cerebrovascular systems, regulating the central nervous system, and improving immunity.Radix Aconiti Lateralis is pungent, sweet, and great warm, belonging to heart, kidney, and spleen Meridian, has the effect of rescuing from collapse by restoring yang, invigorating fire and supporting yang, has immunomodulation, antitumor, antiaging, anti-shock, anti-asthma, heart strengthening, and other activities. SFI can warm yang and supplement kidney, invigorate qi and relieve asthma, generate internal yang, promote triple energy gasification, improve water metabolism, eliminate phlegm and blood stasis in the chest, soothe qi in the lungs, relieve asthma, cough and fullness, and has certain effects on AECOPD.
A total of 15 studies were included in this study, with a total of 1198 cases. The efficacy of SFI in the treatment of AECOPD was systematically evaluated from the aspects of total clinical effective rate, pulmonary function, blood gas analysis, and pulmonary infection index systematic evaluation. Meta-analysis showed: experimental group compared with control group can improve the total clinical effective rate and lung function FEV1 and FEV1/FVC, increasing PaO2, reducing PaCO2, and improving the pulmonary infection indicator WBC, indicating that the efficacy of SFI combined with Western medicine for AECOPD is worthy of recognition. But it is worth noting that the main outcome indicator of this study is the total clinical efficiency. The indicator depends on subjective feelings of patients or subjective judgments of doctors, lacking objective quantitative criteria and difficult to be recognized. Objective indicators generally have a relatively strict error range and result reporting standards, not easily influenced by subjective factors of patients or doctors. however there are only six indexes of pulmonary function and blood gas analysis in this study, which are small in sample size and poorly representative, so it is difficult to comprehensively respond to the effectiveness of intervention measures, and it is difficult to objectively and systematically analyze the data because of the differences of instrument types, doctors' operation level, and statistical methods. In addition, only three of the studies included in the study were given to patients according to Traditional Chinese Medicine (TCM) syndrome differentiation. The blind application of SFI may lead to lower curative effect, ineffective treatment, aggravated disease, and other consequences.
Of the 15 studies included, three studies reported adverse reactions, one study reported no adverse reactions, one study referred to safety observations, and the rest did not mention safety or adverse reactions/events. The symptoms of adverse reactions were mild and did not affect the normal treatment. The patients could tolerate the adverse reactions or relieve the adverse reactions themselves after stopping the treatment. No serious adverse reactions were found. However, we should still pay attention to the safety of Chinese medicine injection; Adverse Drug Reactions (ADRs) of Chinese medicine injection accounted for more than half of ADRs of Chinese medicine, which should be paid attention to by the administrative department, medical personnel, and the public. Studies have shown, that the incidence of ADRs of SFI is mainly related to whether the patient has a history of drug allergy and whether the drug is used rationally in clinical practice. Clinicians should try their best to avoid using SFI in patients with a history of drug allergy and should strictly follow the indication, solvent, and dosage indicated in the instructions.
Methodological quality evaluation
Only by reporting and publishing the best research evidence in a standardized way can be the dissemination and recognition of high-quality evidence be promoted. The poor quality of clinical trials of Chinese medicine is a fundamental problem in the development of evidence-based Chinese medicine, and the literature included in this study is no exception. (1) The number of literature included in this study was small, totaling 15 articles; the sample size was small, the maximum sample size was 144 cases, the minimum sample size was 54 cases, the difference was obvious, the representative was poor, and the risk of bias was high. (2) All the studies included in this study were Chinese literatures, and all of them were positive results. Due to geographical and linguistic limitations, there may be bias in reporting. (3) The quality of methodology was generally low, and the description of the random method simply refers to the word random; the description is not clear, detailed steps are not specified, the hidden and blind methods are assigned, and the sample size estimation basis is not mentioned. Studies have shown that improper selection of randomization and blind methods may erroneously exaggerate the efficacy of traditional Chinese medicine, such as random hiding is not objective or not. Using the blind method will increase the treatment effect by 15%–50%, which is worthy of attention. (4) Most of the literatures did not mention adverse reactions, and only a few of them were mentioned, and no specific causal relationship determination process was reported.
It should be kept in mind that SFI is usually used in severe or critically ill patients, not in common AECOPD patients. It is suitable for the syndrome of sudden yang collapse or deficiency of Yang qi.
This study provides a new idea for the treatment of AECOPD. This suggests that in the future clinical treatment, clinical workers in the treatment of syndrome differentiation can consider using SFI combined with Western medicine for the treatment of AECOPD.
In addition, in view of the low quality of the literature, we hope and suggest that future clinical studies should try to improve the quality of research methodologies and reporting. We should strictly perform random grouping, distribution concealment and blind methods, sample size estimation methods, pay attention to safety indicators, establish a core outcome indicator set, standardize the selection of outcome indicators in clinical studies, and report results were strictly in accordance with the international CONSORT standard. As far as possible, we should carry out high-quality RCT with a large sample, multicenter, and long-term follow-up. To scientifically express the high-quality research evidence produced by the evidence-based practice of TCM in the internationally used language, and to continuously promote the benign development of TCM discipline.
Financial support and sponsorship
This study was funded by the Special Fund for Basic Scientific Research Expenses of Public Welfare Research Institutes at the central level (Z0597).
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6], [Figure 7], [Figure 8], [Figure 9]
[Table 1], [Table 2]