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The Role of Nitric Oxide in the Process of Implantation in Rats.

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Title The Role of Nitric Oxide in the Process of Implantation in Rats.
 
Creator Biswas, S
Kabir, S N
Pal, A K
 
Subject Chemistry
 
Description Nitric oxide (NO) plays an important role in cell signalling in many physiological
systems, including reproduction. During pregnancy, oestrogen modulates uterine NO
generation, and NO may play an intermediary role in the oestrogen-mediated effects on
the uterus. Since oestrogen is actively involved in inducing endometrial receptivity to
support the process of implantation, the role of NO in the process of implantation in rats
was investigated. N\g=w\-nitro-l-argininemethyl ester (l-NAME), an inhibitor of NO
synthase (NOS), was administered in utero with or without sodium nitroprusside (SNP),
a generator of NO, on different days during the preimplantation phase of gestation. The
status of gestation in respect of implantation failure, endometrial receptivity and embryo
development were assessed. l-NAME was administered at various doses (2\p=n-\5mg per
uterine horn) and on different days of pregnancy (days 2\p=n-\6of pregnancy) to optimize the
pregnancy terminating dose (absence of implantation site on day 8 of pregnancy) and
the effective day of treatment. l-NAME led to failure of implantation when administered
at 2.5 mg per uterine horn on day 3 of pregnancy. The characteristic preimplantation
permeability changes in the uterus were significantly attenuated and embryo growth
was retarded. The l-NAME-mediated effects were significantly reversed when SNP
(100 \g=m\g)was co-administered with l-NAME. These findings suggest a role for NO in the
process of implantation. The possible mechanism by which inhibition of the NO\p=n-\NOS
system may interfere with implantation is discussed.
 
Date 1998
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://www.eprints.iicb.res.in/832/1/JOURNAL_OF_REPRODUCTION_AND_FERTILITY%2C_114(_1)%2C_157%2D161[23].pdf
Biswas, S and Kabir, S N and Pal, A K (1998) The Role of Nitric Oxide in the Process of Implantation in Rats. Journal of Reproduction and Fertility, 114 (1). pp. 157-161.
 
Relation http://dx.doi.org/
http://www.eprints.iicb.res.in/832/