Evidence map›Paper›PMID 11896473›Full record

ArticleInternational journal of impotence research2002

Human PDE5A gene encodes three PDE5 isoforms from two alternate promoters.

C-S Lin, S Chow, A Lau, R Tu, T F Lue

Abstract read
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In one paragraph

Article in International journal of impotence research, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
2.4field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

37 citing papers in PubMed, 100 citations in OpenAlex.

  1. Review
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  15. Methylxanthines: Potential Therapeutic Agents for Glioblastoma.Pharmaceuticals (Basel, Switzerland) · 2019
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

C-S LinKnuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, CA 94143-1695, USA. clin@urol.ucsf.edu
S Chow
A Lau
R Tu
T F Lue
University of California, San Francisco · US

Funding

TREATMENT AND PREVENTION OF IMPOTENCER01DK045370 · NIDDK · UNIVERSITY OF CALIFORNIA SAN FRANCISCO · PI LUE, TOM F · 1994 to 2001
$631k
NIDDK NIH HHS 2R01-DK-45370
6 · The paper itself

Abstract

Sildenafil improves erectile function by inhibiting the cGMP-catalytic activity of phosphodiesterase type V (PDE5). We used rapid amplification of cDNA Ends-polymerase chain reaction (RACE-PCR) to isolate three PDE5 isoforms from human corpus cavernosum. Semiquantitative reverse transcription-polymerase chain reaction (RT-PCR) analysis on eight human cavernous tissue samples showed that all samples expressed the PDE5A1 at a lower level than the PDE5A2 isoform. Five samples expressed the PDE5A3 isoform at various levels while the other three did not. Analysis on non-penile tissues showed that all tissues expressed the A1 and A2 isoforms while only those that have substantial amounts of smooth muscle expressed the A3 isoform. Cloning and sequencing of the PDE5A gene showed that the isoform-specific 5'-ends of the PDE5 mRNAs are encoded from three alternative first exons arranged in the order of A1-A3-A2. Promoter activities were detected upstream from the A1-specific exon and in the intron preceding the A2-specific exon. The upstream PDE5A promoter is expected to direct the expression of all three PDE5 isoforms while the intronic PDE5A2 promoter only the A2 isoform. Both promoters were upregulated by increasing concentrations of either cAMP or cGMP. Several transcription factor AP2 and Sp1-binding sequences identified in the promoters are likely to be the mediators of cAMP/cGMP-responsiveness.

Indexed as

Promoter Regions, Genetic3',5'-Cyclic-GMP PhosphodiesterasesAmino Acid SequenceAnimalsBase SequenceCloning, MolecularCOS CellsCyclic AMPCyclic GMPCyclic Nucleotide Phosphodiesterases, Type 5ExonsGene ExpressionGene Expression RegulationHumansIsoenzymesMale3',5'-Cyclic-GMP PhosphodiesterasesCyclic AMPCyclic GMPCyclic Nucleotide Phosphodiesterases, Type 5IsoenzymesPDE5A protein, human

Identifiers

PMID11896473
OpenAlexW2105432495

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.