Abstract
Dialysed C-serum precipitate (DCP), a sub-fraction of latex C-serum originating from Hevea brasiliensis, has shown specific in vitro antiproliferative properties towards cancer-origin cell lines. As a potential agent to be used in cancer treatment, preclinical safety assessment tests are crucial. This study focused on investigating the mutagenicity of DCP via bacterial reverse mutation assay (Ames test), Mouse lymphoma assay (MLA), and micronucleus assay according to OECD guidelines. No mutagenicity was exhibited by DCP at concentrations lower than 1 mg/mL for the five different auxotroph strains of Salmonella typhimurium (TA 98, TA 100, TA 1535, and TA 1537) and Escherichia coli WP2uvrA pKM101 in the absence and presence of metabolic activation system (S9-mix). Nonetheless, it has been found that DCP was able to induce negligible mutation in MLA and micronucleus assay. Overall, DCP does express dose-dependant mutagenicity according to the assays conducted and thus, it is crucial to take this into consideration should DCP be used in the development of therapeutic agent.
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Data availability
The data that support the findings of this study are not openly available due to reasons of sensitivity and are available from the corresponding author upon reasonable request. Data are located in controlled access data storage at Instutute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia.
Abbreviations
- 2-AA:
-
2-Aminoanthracene
- 2-NF:
-
2-Nitrofluorene
- 9-AA:
-
9-Aminoacridine
- BN:
-
Binucleated
- BP:
-
Benzopyrene
- CBPI:
-
Cytokinesis block proliferation index
- CB:
-
Cytochalasin B
- DCP:
-
Dialysed C-serum precipitate
- dThd:
-
Thymidine deoxyriboside
- dTMP:
-
Deoxythymidylate
- E.coli :
-
Escherichia coli
- GEF:
-
Global evaluation factor
- HS:
-
Horse serum
- IMF:
-
Induced mutant frequency
- KCl:
-
Potassium chloride
- LC:
-
Large colony
- MF:
-
Mutant frequency
- MI:
-
Mutagenicity index
- MLA:
-
Mouse lyphoma assay
- MMS:
-
Methylmethane sulfonate
- MN:
-
Micronuclues
- NaN3 :
-
Sodium azide
- NCE:
-
New chemical entities
- NDA:
-
New drug application
- OECD:
-
Organisation for economic co-operation and development
- PBS:
-
Phosphate buffered saline
- R10:
-
RPMI 1640 with 10% HS
- R20:
-
RPMI 1640 with 20% HS
- R5:
-
RPMI 1640 with 5% HS
- RPD:
-
Relative population index
- RPMI 1640:
-
Roswell Park Memorial Institute Media
- RSG:
-
Relative suspension growth
- RTG:
-
Relative total growth
- RV:
-
Relative viability
- S. typhimurium :
-
Salmonella typhimurium
- SC:
-
Small colony
- SMF:
-
Spontaneous mutant frequency
- TFT:
-
Triflourothymidine
- THG:
-
R10 media supplemented with thymidine, hypoxanthine and glycine
- THMG:
-
R10 media supplemented with thymidine, hypoxanthine, methotrexate and glycine
- Tk :
-
Thymidine kinase
- TX:
-
Triton X-100
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Funding
This study was supported by the Malaysia Ministry of Higher Education under the Fundamental Research Grant Scheme (FRGS/1/2014/SG03/USM/02/1) and the Malaysian Rubber Board.
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Raman, M.D., Abd Rahman, N., Elumalai, S. et al. Hevea brasiliensis latex dialysed C-serum precipitate subfraction exerts a negligible level of genotoxicity in the Ames test, mouse lymphoma assay and micronucleus assay. J Rubber Res 26, 139–153 (2023). https://doi.org/10.1007/s42464-023-00201-x
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DOI: https://doi.org/10.1007/s42464-023-00201-x