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Review Article

Buthionine sulfoximine and chemoresistance in cancer treatments: a systematic review with meta-analysis of preclinical studies

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Pages 417-441 | Published online: 22 Aug 2023
 

ABSTRACT

Buthionine sulfoximine (BSO) is a synthetic amino acid that blocks the biosynthesis of reduced glutathione (GSH), an endogenous antioxidant cellular component present in tumor cells. GSH levels have been associated with tumor cell resistance to chemotherapeutic drugs and platinum compounds. Consequently, by depleting GSH, BSO enhances the cytotoxicity of chemotherapeutic agents in drug-resistant tumors. Therefore, the aim of this study was to conduct a systematic review with meta-analysis of preclinical studies utilizing BSO in cancer treatments. The systematic search was carried out using the following databases: PubMed, Web of Science, Scopus, and EMBASE up until March 20, 2023, in order to collect preclinical studies that evaluated BSO, alone or in association, as a strategy for antineoplastic therapy. One hundred nine investigations were found to assess the cytotoxic potential of BSO alone or in combination with other compounds. Twenty-one of these met the criteria for performing the meta-analysis. The evidence gathered indicated that BSO alone exhibits cytotoxic activity. However, this compound is generally used in combination with other antineoplastic strategies, mainly chemotherapy ones, to improve cytotoxicity to carcinogenic cells and treatment efficacy. Finally, this review provides important considerations regarding BSO use in cancer treatment conditions, which might optimize future studies as a potential adjuvant antineoplastic therapeutic tool.

Acknowledgments

We wish to thank the public Brazilian agency “Fundação de Amparo à Pesquisa do Estado do Piauí” (FAPEPI, Teresina, Brazil) in the form of scholarships for Joedna Cavalcante Pereira. Dr Paulo Michel Pinheiro Ferreira is also grateful to the “Conselho Nacional de Desenvolvimento Científico e Tecnológico” for his personal scholarship (CNPq #304803/2022-7).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Authorship contributions

CRO and JCP: Conceptualization, Methodology, Investigation, Formal analysis, Data curation, Writing – Original Draft, Writing – review & editing. ABI: Conceptualization, Methodo-logy. IRRM: Writing – review & editing. JMCS: Formal analysis. PMPF: Formal analysis, Writing – review & editing. FCCS: Conceptualization, Project administration, Resources, Supervision.

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/10937404.2023.2246876

Abbreviations

17AAG=

17-(allylamino)-17-demethoxygeldanamycin

2DG=

2-deoxyglucose

ATN-224=

Tetrathiomolybdate

ATO=

Arsenic trioxide

BCNU=

1,3-bis(2-chloroethyl)-1-nitrosourea/Carmustine

BSO=

Buthionine sulfoximine

CDDP=

Cisplatin

CDX=

Cell-line-derived xenographic models

CFA=

Cyclophosphamide

COX-2=

Cyclooxygenase-2

DOX=

Doxorubicin

GPX=

Glutathione peroxidase

GSH=

Glutathione

GSS=

Gutathione synthetase

L-PAM=

Melphalan

MRP1=

Multidrug resistance protein 1

NA-CAP=

N-acetyl-4-S-cysteaminylphenol

ROS=

Reactive oxygen species

SN-38=

Active metabolite of irinotecan

TETRAC=

Tetraiodothyroacetic acid

VEGF=

Vascular endothelial growth factor

µGCS=

µ-glutamil-cisteína sintetase

γGCS=

γ-glutamylcysteine

MSO=

methionine sulfoximine

SYRCLE=

Systematic Review Center for Laboratory Animal Experimentation

TNF-α=

Alpha tumor necrosis factor

ATCC=

American Type Culture Collection

m@Au-d/B NCs=

Cell membrane-camouflaged gold nanocages

PDT=

Photodynamic therapy

SMD=

Standardized mean difference

SD=

Standard deviations

SEM=

Standard error of the mean

Additional information

Funding

This research did not receive any specific grant from funding agencies in the public, private, or not-for-profit sectors.

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