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Genital Blood Flow Regulation of the Female Rat Involves Phosphodiesterase 4

Overview of attention for article published in Journal of Sexual Medicine, April 2013
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Title
Genital Blood Flow Regulation of the Female Rat Involves Phosphodiesterase 4
Published in
Journal of Sexual Medicine, April 2013
DOI 10.1111/jsm.12058
Pubmed ID
Authors

Fabio Castiglione, Alice Bergamini, Andrea Russo, Giovanni La Croce, Giulia Castagna, Giorgia Colciago, Andrea Salonia, Patrizio Rigatti, Francesco Montorsi, Petter Hedlund

Abstract

INTRODUCTION.: Cyclic adenosine 3'5' monophosphate (cAMP) is produced by adenylate cyclase after activation by, e.g., vasoactive intestinal polypeptide or prostaglandin E1 (PGE1). The cAMP-degrading phosphodiesterase 4 (PDE4) is expressed in the vagina and clitoris, but no information is available on the functional role for PDE4-related signals in the female neurovascular genital response. AIM.: The aim of this study is to study the effect of inhibition of PDE4 with rolipram on nerve- and PGE1-induced vaginal and clitoral blood flow responses of rat. METHODS.: Measure of clitoral and vaginal blood flow and blood pressure in anesthetized rats during activation of the dorsal clitoral nerve (DCN) before and after intraperitoneal administration of rolipram or sildenafil (phosphodiesterase type 5 inhibitors [PDE5]) and nitro-L-arginine (L-NNA) (nitric oxide synthase inhibitor). Effect by topical administration of PGE1 on genital blood flow was also evaluated. MAIN OUTCOME MEASURE.: Blood flow was recorded as tissue perfusion units (TPU) by a Laser Doppler Flowmeter. Mean arterial blood pressure (MAP) was recorded (cmH2 O) in the carotid artery. Blood flow responses are expressed as TPU/MAP. Unpaired t-test and an analysis of variance were used. RESULTS.: Compared with control stimulations, rolipram (0.3 mg/kg) caused a twofold increase in peak blood flow (P < 0.05) and fourfold increase of the rate of clitoral blood flow during activation of the DCN (P < 0.05). Simultaneously, a twofold increase in peak blood flow and threefold increase in rate of blood flow were noted in the vagina (P < 0.05). Similar effects were noted for sildenafil (0.2 mg/kg) (P < 0.05). Inhibitory effects by L-NNA (60 mg/kg) on blood flow responses to DCN activation were significantly lower for rats treated with rolipram than with sildenafil (P < 0.05). PGE1-induced (10 μg) blood flow responses were significantly higher (P < 0.05) in rats treated with rolipram than with sildenafil. CONCLUSIONS.: These findings suggest that the cAMP/PDE4 system may be of similar functional importance as the nitric oxide/cyclic guanosine monophosphate/PDE5 pathway for neurovascular genital responses of the female rat.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 21 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 21 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 4 19%
Other 3 14%
Student > Ph. D. Student 3 14%
Professor > Associate Professor 2 10%
Student > Doctoral Student 1 5%
Other 3 14%
Unknown 5 24%
Readers by discipline Count As %
Medicine and Dentistry 4 19%
Nursing and Health Professions 3 14%
Agricultural and Biological Sciences 2 10%
Pharmacology, Toxicology and Pharmaceutical Science 2 10%
Engineering 2 10%
Other 1 5%
Unknown 7 33%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 26 January 2013.
All research outputs
#20,829,511
of 25,593,129 outputs
Outputs from Journal of Sexual Medicine
#3,117
of 3,552 outputs
Outputs of similar age
#164,112
of 213,508 outputs
Outputs of similar age from Journal of Sexual Medicine
#67
of 75 outputs
Altmetric has tracked 25,593,129 research outputs across all sources so far. This one is in the 10th percentile – i.e., 10% of other outputs scored the same or lower than it.
So far Altmetric has tracked 3,552 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 23.9. This one is in the 5th percentile – i.e., 5% of its peers scored the same or lower than it.
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We're also able to compare this research output to 75 others from the same source and published within six weeks on either side of this one. This one is in the 6th percentile – i.e., 6% of its contemporaries scored the same or lower than it.