DNA damage by reactive species: Mechanisms, mutation and repair

NR Jena - Journal of biosciences, 2012 - Springer
DNA is continuously attacked by reactive species that can affect its structure and function
severely. Structural modifications to DNA mainly arise from modifications in its bases that …

Formation of ring-opened and rearranged products of guanine: mechanisms and biological significance

NR Jena, PC Mishra - Free Radical Biology and Medicine, 2012 - Elsevier
DNA damage by endogenous and exogenous agents is a serious concern, as the damaged
products can affect genome integrity severely. Damage to DNA may arise from various …

A DFT study of reactions of methyldiazonium ion with DNA/RNA nucleosides: investigating effect of sugar moiety on methylation pattern of bases

K Bhattacharjee, PK Shukla - International Journal of Quantum …, 2014 - Wiley Online Library
Methyldiazonium ion () is an ultimate carcinogen that can methylate multiple sites in
DNA/RNA. In present contribution, density functional theory calculations using the B3LYP …

Does 8-Nitroguanine Form 8-Oxoguanine? An Insight from Its Reaction with OH Radical

K Bhattacharjee, PK Shukla - The Journal of Physical Chemistry B, 2018 - ACS Publications
8-Nitroguanine (8-nitroG) formed due to nitration of guanine base of DNA plays an important
role in mutagenesis and carcinogenesis. In the present contribution, state-of-the-art quantum …

Base pairing patterns of DNA base lesion spiroiminodihydantoin: A DFT study

PK Shukla, PC Mishra - International Journal of Quantum …, 2013 - Wiley Online Library
The DNA base lesion spiroiminodihydantoin (Sp) is produced in biological systems
endogenously and can cause mutation and cancer. It is considered to be more mutagenic …

Mechanism of methylation of 8-oxoguanine due to its reaction with methyldiazonium ion

K Bhattacharjee, PC Mishra, PK Shukla - Molecular Simulation, 2017 - Taylor & Francis
Anticancer drugs such as temozolomide (TMZ) and decarbazine (DTIC) and several
detrimental methylating agents methylate DNA via the formation of methyldiazonium ion () …

Cytotoxic and genotoxic effects of the trypanocidal drug diminazene aceturate

MD Baldissera, MR Sagrillo, TH Grando… - Comparative Clinical …, 2017 - Springer
Diminazene aceturate (DA) is an anti-parasitic drug that selectively targets adenine and
thymine bases of deoxyribonucleic acid (DNA) of trypanosomes; however, there are some …

Formation of bifunctional cross-linked products due to reaction of NAMI-A with DNA bases–a DFT study

PK Shah, PK Shukla - Structural Chemistry, 2022 - Springer
It is reported that NAMI-A and other Ru-anticancer complexes preferably bind with the N7
site of guanine and can also form DNA inter-strand cross-links. Therefore, in order to …

Oxidative stress in cardiac remodeling post-ischemia/reperfusion: friend or foe?

E Abidi, A Kaplan, GW Booz, FA Zouein - Oxidative Stress in Heart …, 2019 - Springer
Acute coronary artery disease remains the leading cause of death in the USA and most
westernized cultures. Notwithstanding the promising pharmacological and interventional …

Effect of N7-methylation on base pairing patterns of guanine: A DFT study

S Biswas, PK Shukla - Journal of Molecular Modeling, 2021 - Springer
In this paper, we aim to determine whether the N7-methylation can influence the base
pairing properties of guanine by promoting the formation of guanine enol-tautomers. The …