Contraception being the need for the hour, we have synthesized few analogues of nifedipine, an L-type calcium channel blocker
and evaluated their effects on sperm fertility. The glass transition temperature (Tg) of spermatozoa has been monitored to
characterize the cellular damage due to aging or by external agents. We have shown that the Tg can be used as a marker to measure
infertility caused by external agents. The cellular damage can be due to the cell immobilization or due to the membrane alteration
ultimately leading to infertility. Results have been supported by measuring the cell motility, metabolism and lipid peroxidation;
the well established markers for estimating the sperm fertility. Unlike D4, nifedipine and analogue D2 cause sperm cell aging
by hampering the motility without causing the membrane damage. This indicates that the damage caused due to D4 may be
irreversible. Thus the present findings demonstrate that D2 can be a promising candidate as a lead molecule for the development
of reversible antifertility agents
Sudha Srivastava has done PhD in chemistry from Tata Institute of Fundamental Research, Mumbai and is presently senior scientist, Manager,
National Facility for High Field NMR, at TIFR, Mumbai. She is Fellow, National Academy of Sciences. Her major research areas are: NMR studies on
intact cells, membrane architecture, drug-design, drug-DNA interactions, conformation and dynamics of bioactive peptides, proteins and hormones.
She has more than 130 research publications in refereed journals and is serving as an editorial board member of repute.
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