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Abstract

Objectives:

The study aims to evaluate the therapeutic efficacy and safety of Chinese herbal medicine (Xiaoaiping) injections for chemotherapy-induced thrombocytopenia (CIT) in nonsmall cell lung cancer (NSCLC) and gastric cancer.

Design:

A randomized, controlled, multicenter study from December 2013 to August 2015.

Settings/Location:

All patients are from China.

Subjects:

One hundred forty patients with either NSCLC or gastric cancer were enrolled in this trial.

Interventions:

The intervention group (n = 70) was given Xiaoaiping injections (1 dose/day for 10 days) with chemotherapy, whereas the control group (n = 70) was given chemotherapy only. The follow up period was 11 days after the final injection.

Outcome measures:

Platelet (PLT) count was tested at day 0, 7, 14, and 21 as the primary outcome for evaluation. Safety measurements, including red blood cells (RBC), hemoglobin (HBG), white blood cells (WBC), neutrophil (NE)#, aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase (LDH), creatine kinase (CK), creatinine (Cr), and blood urea nitrogen (BUN) were tested at day 0 and 21 as the secondary outcomes.

Results:

(1) Two patients in the intervention group and four patients in the control group were lost upon follow-up. (2) PLT count: there was no significant difference in PLT count between the two groups from baseline (day 0), day 7, and day 14. At day 21, the intervention group indicated an upward trend of PLT count with a statistically significant difference than that of the control group (p < 0.05). (3) NSCLC: there was significant difference in PLT count between the two groups on day 21 (p < 0.01). (4) Gastric cancer: there was no significant difference in PLT count between the two groups during this trial (p > 0.05). (5) There was no statistically significant difference between the intervention group and the control group with the safety figures (secondary outcomes) RBC, HGB, WBC, NE#, AST, ALT, LDH, CK, Cr, and BUN measured (p > 0.05). (6) Adverse events: one gastric cancer patient in the control group was diagnosed with gastrointestinal bleeding on day 3.

Conclusions:

In conclusion, Xiaoaiping injections may provide a safe and effective option for CIT in patients with NSCLC.

Introduction

Cancer is the leading cause of death in China and a major public health concern, increasing in rate of both incidence and mortality.^1
–3 Lung cancer (incidence 733.3/100,000 and mortality 610.2/100,000) and gastric cancer (incidence 679.1/100,000 and mortality 498.0/100,000) are the first and second most prominent cancers in China, respectively, in terms of incidence and mortality rates.⁴

Chemotherapy is the predominant treatment method for cancer with substantial progress being made in the last 50 years. Platinum-based chemotherapy is used significantly, with benefits, including increasing overall survival rates, enhancing quality of life (QoL), and increasing survival in advanced-stage disease.⁵ Unfortunately, thrombocytopenia is a common side effect in cancer patients resulting from cytotoxicity.⁶ Development of chemotherapy-induced thrombocytopenia (CIT) may cause a delay or reduction to the course of chemotherapy, subsequently affecting its effectiveness.⁷ Moreover, CIT is the main dose-limiting toxicity factor of platinum-based chemotherapy.⁸ CIT is treated with platelet (PLT) transfusion, recombinant human thrombopoietin (rhTPO), and recombinant human interleukin-11 (rhIL-11),⁹ all of which are approved by the China Food and Drug Agency (CFDA). There are, however, present risks associated with transfusion in terms of transfusion-related acute lung injuries.¹⁰ Several side effects of rhTPO and rhIL-11 have been documented, including fever, chills, fatigue, rash, edema, dyspnea, pleural effusion, atrial arrhythmia, and headache.^11,12

Traditional Chinese Medicine (TCM) is a complementary and alternative medicine that is used not only in the treatment of cancer and cancer-related conditions, but also to improve the side effects of anticancer therapies.¹³ A meta-analysis of clinical studies has found that TCM may improve cancer-related symptoms, QoL, enhance immune function and reduce the side effects of chemotherapy.¹⁴

TCM theory dictates the pathology of CIT as a heat toxicity that damages the qi and yin, and herbs functioning to clear heat toxins may thereby remedy or prevent CIT. Xiaoaiping injection is a traditional Chinese herbal medicine extracted from the root of Marsdenia tenacissima (Tong Guang Teng), which is cooling in nature.¹⁵ Clinical research indicates that Xiaoaiping injections not only significantly inhibit the growth of gastric cancer cells, but also improve the effectiveness of chemotherapy, improve QoL, and reduce the incidence of bone marrow suppression when used during chemotherapy.^16

–20 In addition, a retrospective study found that Xiaoaiping injections have the function of improving CIT in advanced nonsmall cell lung cancer (NSCLC) patients.²¹ To further evaluate the effectiveness and safety of Xiaoaiping injections for CIT, a randomized, controlled, multicenter clinical trial was performed from December 2013 to August 2015.

Materials and Methods

Study design

The study is a randomized, controlled, multicenter trial. It is registered in the Chinese Clinical Trial Registry (ChiCTR) under registration no.: ChiCTR-TRC-13003888.

A study sample size of 120 patients was calculated based upon a prior study.²¹ The allocation ratio was 1:1, with 60 patients in the intervention group and 60 patients in the control group. A sample size of 144 patients was deemed sufficient to compensate for a 20% attrition rate.²¹

Allocation: independent third-party researchers used opaque envelopes to seal distribution cards containing computer-generated random numbers that were then sent to researchers at collaborating centers. Once a patient was deemed eligible, they were randomized into a group according to the provision on the distribution card. Patients and researchers were not blinded to the type of treatment, and the participants were informed of the study design when recruited.

Participants

The participants were recruited from six collaborating medical hospitals in China.

Inclusion criteria

Inclusion criteria: (1) diagnosed with NSCLC or gastric cancer by imaging and/or histopathology or cytology; (2) no age limit; (3) Karnofsky Performance Status score ≥60; (4) Expected survival time ≥6 months; (5) indicated to receive initial platinum-based chemotherapy only, without receiving radiotherapy and/or chemotherapy within 2 months of trial commencement; (6) no diagnosis of comorbid disease (heart, liver, kidney, blood disease); and (7) willingness to participate in clinical research and to sign informed consent.

Exclusion criteria

Exclusion criteria: (1) did not meet the inclusion criteria; (2) mental disorders (cancer combined with moderate depression or above) as assessed by previous medical history or referring clinician (to exclude patients unable to correctly describe the subjective symptoms); (3) patients who had serious uncontrolled comorbid disease or acute infection; (4) pregnant or lactating women; (5) previous record of poor drug compliance by medical treatment history.

Treatment and follow-up

Patients in both groups received conventional chemotherapy. The intervention group received a daily Xiaoaiping injection for 10 consecutive days beginning on the first day of chemotherapy (approval no.: Z20025868; Manufacturer: Nanjing Sanhome Pharmaceutical Co., Ltd.; Specifications: 3 × 20 mL/dose). The patients in the control group were given conventional chemotherapy only. The trial involved 10 days of treatment with an 11-day follow-up period.

Outcome measures

Primary outcomes measurements

Primary outcomes: effectiveness was measured with PLT count of both groups. PLT count was assessed at the baseline and at three time points: day 7, 14, and 21. The data of each time point was analyzed and compared between intervention and control groups, and for both NSCLC and gastric cancer subgroup patients.

Secondary outcome measurements

Secondary outcomes: safety measurements included count of white blood cells (WBC), red blood cells (RBC), hemoglobin (HGB), alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), creatine kinase (CK), blood urea nitrogen (BUN), and creatinine (Cr). The above figures were assessed at baseline and day 21. The data from each time point was analyzed between the two groups.

Adverse events

All participants were asked about any adverse events during their visits and were also instructed to record any unexpected events throughout the trial in a diary.

Statistics methods

The analyses were performed using SPSS software (IBM, Version 21.0) by a third-party clinical evaluation center. Frequencies and descriptive statistics were used for patients' demographic presentation, mean and standard deviations were calculated for the continuous variables, and group differences were analyzed using Pearson chi-square test for categorical variables. A Kolmogorov–Smirnov test was used to check the distribution of data. Independent t-tests were used for normally distributed data, while Mann–Whitney U tests were used for non-normal distributions. The primary outcome of PLT count in both groups, PLT count in NSCLC subgroup, PLT in gastric cancer subgroup, and secondary outcomes were analyzed using nonparametric tests. The significance level was set to p < 0.05 for all analyses.

Results

Characteristics of the patients

From December 2013 to August 2015, 144 patients were monitored in total, with 140 patients allocated evenly between an intervention group (n = 70) and a control group (n = 70) from six collaborating medical centers. A total of two patients in the intervention group and four patients in the control group were lost to follow-up. The data of patients lost is included in the full analysis set. The study protocol followed the recommendations outlined in the Consolidated Standards of Reporting Trials (CONSORT²²) (Fig. 1).

FIG. 1.

Flow diagram of enrolment.

There were no significant differences at the baseline between intervention and control groups' patient characteristics, in terms of age, gender ratio, and cancer type ratio (Table 1).

Table 1.

Comparison of Baseline Characteristics Between the Two Groups

Variable	Intervention group (n = 70)	Control group (n = 70)	p
Age (mean ± SD)	63.23 ± 7.83 (95% CI: 61.36–65.30)	63.50 ± 10.41 (95% CI: 61.02–65.98)	0.60
Gender (n/%)
Male	51 (72.86)	51 (72.86)	>0.05
Female	19 (27.14)	19 (27.14)	>0.05
Cancer type (n/%)
Lung cancer	46 (65.71)	46 (65.71)	>0.05
Gastric cancer	24 (34.29)	24 (34.29)	>0.05

CI, confidence interval; SD, standard deviation.

Primary outcomes

During the period of treatment and subsequent follow-up, there was no significant difference in PLT count between the two groups at baseline, day 7, and 14. There was significant downward trend in PLT count from baseline to day 21 in both groups. At day 21 the control group showed a continuing downward trend of PLT count, while the intervention group showed an upward trend of PLT count; there was a statistically significant difference between the two groups at this time (p < 0.05). (Table 2; Fig. 2)

Table 2.

Primary Outcomes of Platelet Count in Two Groups

	Intervention group (n = 70)		Control group (n = 70)		p
	Mean ± SD	95% CI	Mean ± SD	95% CI	p
Day 0	238.31 ± 91.18	216.57–260.05	235.47 ± 86.13	214.93–256.01	0.85
Day 7	216.10 ± 89.52	194.76–237.44	207.27 ± 80.63	226.50–288.05	0.61
Day 14	199.20 ± 92.00	177.26–221.14	196.40 ± 92.84	174.26–218.54	0.89
Day 21	231.13 ± 91.94	209.21–253.05	195.54 ± 90.08	174.06–217.02	0.02^*

p < 0.05 comparison between two groups.

CI, confidence interval; SD, standard deviation.

FIG. 2.

Primary outcomes of PLT count in the two groups of four interviews. CI, confidence interval; PLT, platelet.

Further subgroup analysis of NSCLC patients: PLT count in NSCLC patients in the two groups decreased from baseline to day 21. A significant difference existed between the two groups (p < 0.01) (Table 3; Fig. 3).

Table 3.

Primary Outcomes: Subgroup Analysis of Platelet Count in Nonsmall Cell Lung Cancer Patients

	Intervention group (n = 46)		Control group (n = 46)		p
	Mean ± SD	95% CI	Mean ± SD	95% CI	p
Day 0	249.35 ± 94.24	221.36–277.34	240.26 ± 76.97	217.40–263.12	0.61
Day 7	224.80 ± 91.05	197.77–251.84	206.85 ± 72.93	185.19–228.51	0.42
Day 14	201.67 ± 93.62	173.87–229.47	197.48 ± 91.39	170.34–224.62	0.75
Day 21	247.00 ± 92.15	219.63–274.37	191.09 ± 91.47	163.92–218.25	0.004^**

p < 0.01 comparison between two groups.

CI, confidence interval; SD, standard deviation.

FIG. 3.

Primary outcomes: subgroup analysis of PLT count in NSCLC patients of four interviews. CI, confidence interval; NSCLC, nonsmall cell lung cancer; PLT, platelet.

Further subgroup analysis of gastric cancer patients: PLT count decreased in gastric cancer patients and there was no significant difference between the two groups (Table 4; Fig. 4).

Table 4.

Primary Outcomes: Subgroup Analysis of Platelet Count in Gastric Cancer Patients

	Intervention group (n = 24)		Control group (n = 24)		p
	Mean ± SD	95% CI	Mean ± SD	95% CI	p
Day 0	217.17 ± 82.78	182.21–252.12	226.29 ± 102.63	182.96–269.63	0.74
Day 7	199.42 ± 85.89	163.15–235.69	208.08 ± 95.36	167.82–248.35	0.83
Day 14	194.46 ± 90.62	156.19–232.72	194.33 ± 97.52	153.15–235.51	0.94
Day 21	200.71 ± 85.30	164.69–236.73	204.08 ± 88.64	166.65–241.51	0.74

CI, confidence interval; SD, standard deviation.

FIG. 4.

Primary outcomes: subgroup analysis of PLT count in gastric cancer patients of four interviews. CI, confidence interval; PLT, platelet.

Secondary outcomes

There was no statistically significant difference between the intervention group and the control group with safety figures, in terms of RBC, HGB, WBC, neutrophil (NE)#, AST, ALT, LDH, CK, Cr, and BUN (p > 0.05) (Table 5).

Table 5.

Secondary Outcomes of Safety Figures in Two Groups from Day 0 and 21

	Intervention group (n = 70)		Control group (n = 70)		p
	Mean ± SD	95% CI	Mean ± SD	95% CI	p
Day 0
RBC	3.96 ± 0.58	3.82–4.09	3.91 ± 0.77	3.73–4.09	0.70
HGB	118.04 ± 21.18	112.99–123.09	114.31 ± 27.11	107.85–120.78	0.37
WBC	7.07 ± 3.04	6.35–7.80	6.93 ± 2.77	6.27–7.59	0.95
NE#	4.76 ± 2.84	4.08–5.44	4.65 ± 2.63	4.02–5.28	0.91
AST	20.98 ± 10.43	18.50–23.47	22.94 ± 17.96	18.66–27.23	0.49
ALT	20.22 ± 15.82	16.45–24.00	21.01 ± 19.04	16.47–25.55	0.95
LDH	221.81 ± 143.36	187.62–255.99	199.45 ± 61.21	184.86–214.05	0.70
CK	53.42 ± 28.40	46.65–60.19	54.36 ± 27.45	47.81–60.90	0.78
Cr	58.52 ± 14.63	55.03–62.01	67.36 ± 36.11	58.77–75.98	0.23
BUN	6.78 ± 8.95	4.64–8.91	5.96 ± 4.62	4.86–7.06	0.51
Day 21
RBC	3.82 ± 0.68	3.66–3.99	3.69 ± 0.64	3.54–3.84	0.22
HGB	115.78 ± 19.62	111.10–120.45	110.51 ± 19.41	105.88–115.14	.11
WBC	6.66 ± 4.17	5.67–7.66	6.56 ± 2.61	5.94–7.19	.27
NE#	5.21 ± 8.76	3.12–7.30	4.44 ± 2.35	3.88–5.00	.13
AST	23.21 ± 10.71	20.66–25.77	27.84 ± 22.36	22.51–33.18	.32
ALT	21.36 ± 13.29	18.19–24.53	28.42 ± 55.42	15.21–41.64	.65
LDH	210.89 ± 108.62	184.99–236.79	179.34 ± 67.28	163.30–195.39	.21
CK	59.68 ± 33.91	51.59–67.76	51.58 ± 19.06	47.04–56.13	.15
Cr	56.51 ± 13.58	53.27–59.75	59.12 ± 25.20	53.11–65.13	.79
BUN	5.33 ± 2.04	4.85–5.82	6.15 ± 5.65	4.80–7.50	.98

ALT, alanine aminotransferase; AST, aspartate aminotransferase; BUN, blood urea nitrogen; CI, confidence interval; CK, creatine kinase; Cr, creatinine; HGB, hemoglobin; LDH, lactate dehydrogenase; NE, neutrophil; RBC, red blood cells; SD, standard deviation; WBC, white blood cells.

Adverse events

During the study, one gastric cancer patient in the control group was diagnosed with gastrointestinal bleeding on day 3 and was withdrawn from the study.

Discussion

CIT is a toxic side effect of platinum-based chemotherapeutics.²³ In the rationale of TCM, chemotherapy drugs generate heat toxins, which directly damage bone marrow and blood collaterals leading to marrow collateral damage and obstructed blood movement. Stagnation of toxic pathogens in bone marrow and weakened generation and transformation of bone marrow cause qi-blood depletion. Blood stasis caused by obstruction of movement inhibits the generation of new blood, and as a result, lack of moistening and nourishing leads to deficiency and damage of the bone marrow. Furthermore, the deficiency and damage of bone marrow worsens blood stasis, forming a negative feedback loop. According to “Treatise on Blood Syndromes” (Xue Zheng Lun), “Blood stasis in the human body cannot be added to the good blood, instead it inhibits the generation and transformation of new blood. As a result, patients with blood stasis should be treated with the principle of removing stasis.”

TCM is a prominent complementary and alternative medicine therapy used in oncology.^4,13 A systematic review¹⁸ reported that Chinese medicine injections are commonly used to relieve chemotherapy-related symptoms, such as leukopenia, vomiting, and nausea, with Xiaoaiping being used most frequently. It is a patented, single-herb Chinese medicine extracted from the roots of M. tenacissima with primary constituents, including C₂₁ steroidal saponins, organic acids, triterpenes, and polysaccharides.²⁴ Studies indicate that Xiaoaiping encourages the infiltration and function of CD8+ T cells, which then boosts the antigrowth effects of cisplatin on Lewis lung cancer cell xenografts,²⁵ it inhibits angiogenesis by downregulation of vascular endothelial growth factor signaling and protein kinase B pathway in cancer cells,²⁶ and retrospective research suggests it may improve CIT.²¹ On this basis, a randomized, controlled, multicenter trial was designed. The study demonstrated that there was no significant difference in PLT count at day 7 and 14 (p > 0.05), but PLT count in the intervention group was higher than in the control group at day 21 with a significant difference (p < 0.05). Further analysis found that there was no significant difference in PLT count among gastric cancer patients in the two groups regardless of time point. However, a statistically significant difference was found in the NSCLC group at day 21 (p < 0.01).

The determination of the safety of Chinese medicine for cancer care remains a priority.²⁷ RBC, HGB, WBC, NE#, AST, ALT, LDH, CK, Cr, and BUN were tested in this study with no significant differences between the two groups at the baseline and day 21 (p > 0.05). No severe adverse events occurred in the intervention group.

Conclusions

In conclusion, Xiaoaiping injections may provide a safe and effective option for CIT in patients with NSCLC. The strength of the trial lies in its novelty of being the first randomized, controlled, multicenter trial focusing on Chinese herbal medicine injections for CIT, with promising results. However, future trials are advised due to several concerns: a possibility exists of performance bias because researchers, patients, and data analysts were not blinded; the follow-up time was limited; and multiple chemotherapy regimens were included, which may affect the accuracy of our results.

Footnotes

Acknowledgments

The authors thank the collective trial team and third-party researchers for their assistance in this study. Funding: This study was supported by grants from the PhD Research Program of Beijing University of Chinese Medicine.

Author Contributions

X.L., L.H., and X.C. designed the study. X.L., Q.D., and S.T. collected the data. X.L., Q.D., and S.T. were involved in mortality follow-up and verification. S.Q., X.L., and K.W. analyzed the data. S.Q. drafted the article. S.Q. and X.L. contributed to the interpretation of the results and critical revisions of the article for important intellectual content and approved the final version of the article. All authors have read and approved the final article. S.Q. and X.L. are the study guarantors. D.P. and H.L. contributed to language editing.

Ethics Approval

This study was approved by the Ethics Committee of Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine (Beijing, China). No:. ECPJ-BDY-2013-36.

Author Disclosure Statement

No competing financial interests exist.

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Chinese Herbal Medicine ( Xiaoaiping ) Injections for Chemotherapy-Induced Thrombocytopenia: A Randomized,Controlled,Multicenter Clinical Trial

Abstract

Objectives:

Design:

Settings/Location:

Subjects:

Interventions:

Outcome measures:

Results:

Conclusions:

Introduction

Materials and Methods

Study design

Participants

Inclusion criteria

Exclusion criteria

Treatment and follow-up

Outcome measures

Primary outcomes measurements

Secondary outcome measurements

Adverse events

Statistics methods

Results

Characteristics of the patients

Primary outcomes

Secondary outcomes

Adverse events

Discussion

Conclusions

Footnotes

Acknowledgments

Author Contributions

Ethics Approval

Author Disclosure Statement

References