Cellular and Molecular Effects of Beta Radiation from I-131 on Human Tumor Cells a Comparison with Gamma Radiation

ISSN: 1874-4729 (Online)
ISSN: 1874-4710 (Print)

Volume 8, 2 Issues, 2015

Download PDF Flyer

Current Radiopharmaceuticals

Aims & ScopeAbstracted/Indexed in

Submit Abstracts Online Submit Manuscripts Online

Sean L. Kitson
Current Radiopharmaceuticals
Almac Sciences
Almac House
20 Seagoe Industrial Estate
Craigavon, BT63 5QD
Northern Ireland

View Full Editorial Board

Subscribe Purchase Articles Order Reprints

Cellular and Molecular Effects of Beta Radiation from I-131 on Human Tumor Cells a Comparison with Gamma Radiation

Current Radiopharmaceuticals, 7(2): 138-143.

Author(s): Chandan Kumar, Sundarraj Jayakumar, Badri N. Pandey, Grace Samuel and Meera Venkatesh.

Affiliation: Isotope Applications and Radiopharmaceuticals Division, Bhabha Atomic Research Centre, Mumbai- 400085, India.


To study the comparative effects of beta radiation emitted from Na131I with equivalent dose of 60Co γ- radiation across a range of tumor types and underlying mechanism of cytotoxicity.

Different tumor cell lines of various tissue origin viz. Raji, U937, A431 and MCF-7 were irradiated with beta radiation emitted from Na131I and equivalent dose of 60Co γ- radiation (0.4 Gy). Cellular toxicity and apoptosis study were carried out in four cell lines and the effects were compared. Gene expression studies of P21, RAD51 and BAX genes were analyzed by q-PCR after β- and γ-irradiation.

Cell viability (trypan blue assay) and apoptosis (DNA fragmentation and cleavage of PARP assays) studies for both types of radiation showed that among the four cell lines, A431 is most radio-resistant while MCF-7 and U937 are moderately radiation resistant and Raji cells showed maximum radiosensitivity. However, irradiation of cells with beta radiation from I-131 resulted in enhanced toxicity and apoptosis in tumor cells compared to equivalent dose of γ- rays. Gene expression studies in Raji cells showed difference in magnitude and kinetics of RAD51 and P21 expression after β- and γ-irradiation.

Our results showed higher efficacy of beta radiation in induction of tumor cell cytotoxicity and apoptosis compared to an equivalent dose of γ-radiation, which may be associated with differential DNA damage and subsequent repair kinetics in tumor cells after these radiations.


Apoptosis, cytotoxicity, gamma rays, gene expression, I-131, radio-sensitivity.

Purchase Online Order Reprints Order Eprints Rights and Permissions

Article Details

Volume: 7
Issue Number: 2
First Page: 138
Last Page: 143
Page Count: 6
DOI: 10.2174/1874471007666140716115938

Related Journals

Webmaster Contact: urooj@benthamscience.org Copyright © 2015 Bentham Science