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Nutr Res Pract. 2015 Apr;9(2):129-36. doi: 10.4162/nrp.2015.9.2.129. Epub 2014 Dec 26.

Active hexose correlated compound potentiates the antitumor effects of low-dose 5-fluorouracil through modulation of immune function in hepatoma 22 tumor-bearing mice.

Author information

1
Fujian Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Huatuo Road, No1, Fuzhou, 350108, China.
2
The Second People's Hospital of Fujian Province, China.
3
Inspection and Quarantine Technique Centre of Fujian Entry-exit Inspection and Quarantine Bureau, China.

Abstract

BACKGROUND/OBJECTIVES:

A variety of immunomodulators can improve the efficacy of low-dose chemotherapeutics. Active hexose correlated compound (AHCC), a mushroom mycelia extract, has been shown to be a strong immunomodulator. Whether AHCC could enhance the antitumor effect of low-dose 5-fluorouracil (5-FU) via regulation of host immunity is unknown.

MATERIALS/METHODS:

In the current study Hepatoma 22 (H22) tumor-bearing mice were treated with PBS, 5-FU (10 mg·kg(-1)·d(-1), i.p), or AHCC (360 mg·kg(-1)·d(-1), i.g) plus 5-FU, respectively, for 5 d. CD3(+), CD4(+), CD8(+), and NK in peripheral blood were detected by flow cytometry. ALT, AST, BUN, and Cr levels were measured by biochemical assay. IL-2 and TNFα in serum were measured using the RIA kit and apoptosis of tumor was detected by TUNEL staining. Bax, Bcl-2, and TS protein levels were measured by immunohistochemical staining and mRNA level was evaluated by RT-PCR.

RESULTS:

Diet consumption and body weight showed that AHCC had no apparent toxicity. AHCC could reverse liver injury and myelosuppression induced by 5-FU (P < 0.05). Compared to mice treated with 5-FU, mice treated with AHCC plus 5-FU had higher thymus index, percentages of CD3(+), CD4(+), and NK cells (P < 0.01), and ratio of CD4(+)/CD8(+) (P < 0.01) in peripheral blood. Radioimmunoassay showed that mice treated with AHCC plus 5-FU had the highest serum levels of IL-2 and TNFα compared with the vehicle group and 5-FU group. More importantly, the combination of AHCC and 5-FU produced a more potent antitumor effect (P < 0.05) and caused more severe apoptosis in tumor tissue (P < 0.05) compared with the 5-FU group. In addition, the combination of AHCC and 5-FU further up-regulated the expression of Bcl-2 associated X protein (Bax) (P < 0.01), while it down-regulated the expression of B cell lymphoma 2 (Bcl-2) (P < 0.01).

CONCLUSIONS:

These results support the claim that AHCC might be beneficial for cancer patients receiving chemotherapy.

KEYWORDS:

5-fluorouracil; Muschroom; hepatocarcinoma; immune; toxicity

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