Oncotarget. 2017 Jul 06;8(51):89108-89118. doi: 10.18632/oncotarget.19059. eCollection 2017 Oct 24.
Can polysaccharide K improve therapeutic efficacy and safety in gastrointestinal cancer? a systematic review and network meta-analysis.
Oncotarget
Yan Ma, Xiaofen Wu, Jingwen Yu, Jinyan Zhu, Xia Pen, Xianjun Meng
Affiliations
Affiliations
- Center of Experiment Teaching, Shenyang Normal University, Shenyang 110034, P.R. China.
- The Sixth People's Hospital of Shenyang, Shenyang 110005, P.R. China.
- Food Inspection Monitoring Center of Zhuanghe, Dalian 116400, P.R. China.
- College of Food Science, Shenyang Agriculture University, Shenyang 110866, P.R. China.
PMID: 29179503
PMCID: PMC5687673 DOI: 10.18632/oncotarget.19059
Abstract
OBJECTIVE: To assess the comparative efficacy and safety of polysaccharide K (PSK), with or without chemotherapy, for patients with gastrointestinal cancer (GIC) through a systematic review and network meta-analysis.
MATERIALS AND METHODS: We performed a network meta-analysis to identify evidence from randomized controlled trials. We searched PubMed, Embase and the Cochrane Library for publications up to May 2017. The prespecified primary efficacy outcomes were 1-7 year overall survival (OS), while the secondary efficacy outcomes were 1-7 year disease-free survival (DFS); we performed subgroup analyses and meta-regressions according to the cancer type (colorectal, esophagus and gastric cancer) and treatment arms (with or without chemotherapy). Safety outcomes were side effects of PSK. We conducted pairwise meta-analyses using a random-effects model and then performed random-effects network meta-analyses.
RESULTS: A total of 23 trials were eligible, involving 10684 patients and 13 intervention arms. PSK treatment significantly increased 1-5 year OS and resulted in positive trends in 6-7 year OS; significant increases were also found in 1-7 year DFS, while no increase in side effects was observed. Significant efficacy outcomes obvious in colorectal and gastric cancer groups, as well as PSK combined with chemotherapy groups (iv, po, iv+po). Network meta-analysis revealed that PSK combined with chemotherapy was superior, with significantly increased 3-year and 5-year OS. The study is registered with PROSPERO (CRD42017065193).
CONCLUSIONS: The adjuvant immunochemotherapy agent PSK is effective and safe for patients with GIC. PSK combined with chemotherapy appears to be the preferred application of PSK.
Keywords: PSK; gastrointestinal cancer; immunochemotherapy; network meta-analysis; polysaccharide K
Conflict of interest statement
CONFLICTS OF INTEREST The authors have declared that there is no competing interest.
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