Evidence map›Paper›PMID 26537427›Full record

ReviewPhysiological reviews2016

Spermatogenesis: The Commitment to Meiosis.

Michael D Griswold

Registry-linked trialOpen access · greenAbstract readReview
In one paragraph

Review in Physiological reviews, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05701332 (Effect of Intravesical B.C.G and Gemcitabine on Semen Quality and Testicular Volume in Patients With Non-muscle Invasive Bladder Cancer Patients), which is not on this map. Cited by 451 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
451citing papers in PubMed, 1 pooled it
40.5field-weighted citation impact, top 1% 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.

NCT05701332 phase4unknown statusnot on this mapstarted 2023, after this paper: background citation

Effect of Intravesical B.C.G and Gemcitabine on Semen Quality and Testicular Volume in Patients With Non-muscle Invasive Bladder Cancer Patients

TypeinterventionalSponsorAssiut UniversityRan2023 to 2025Enrolled25ConditionsUrothelial Carcinoma Bladder, Sperm Count, Low, Testis, FibrosisArmsBacillus Calmette Guerin
3 · Its place in the literature

Who cites it

451 citing papers in PubMed, 1 synthesis or guideline pooled it, 768 citations in OpenAlex.

  1. Pooled it
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  3. Review
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  8. Review
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  11. Pharmaceuticals (Basel, Switzerland) · 2026
    Article
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  13. Review
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  15. Review
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391 more citing papers are in PubMed but not listed here.

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

1 author at 1 institution in 1 country.

Michael D GriswoldSchool of Molecular Biosciences, Center for Reproductive Biology, College of Veterinary Medicine, Washington State University, Pullman, Washington.
Washington State University · US

Funding

Spermatogonial Stem Cell Self-Renewal and DifferentiationU54HD042454 · NICHD · UNIVERSITY OF WASHINGTON · PI AMORY, JOHN K. · 2002 to 2016
$26.9M
Hormonal Regulation Sertoli Cell MaturationR01HD010808 · NICHD · WASHINGTON STATE UNIVERSITY · PI MICHAEL D GRISWOLD · 1985 to 2026
$6.0M
HORMONAL REGULATION OF SERTOLI CELL MATURATIONR37HD010808 · NICHD · WASHINGTON STATE UNIVERSITY · PI GRISWOLD, MICHAEL D · 1997 to 2006
$1.8M
NICHD NIH HHS HD10808NICHD NIH HHS R01 HD010808NICHD NIH HHS U54 HD042454PHS HHS U54 42454
6 · The paper itself

Abstract

Mammalian spermatogenesis requires a stem cell pool, a period of amplification of cell numbers, the completion of reduction division to haploid cells (meiosis), and the morphological transformation of the haploid cells into spermatozoa (spermiogenesis). The net result of these processes is the production of massive numbers of spermatozoa over the reproductive lifetime of the animal. One study that utilized homogenization-resistant spermatids as the standard determined that human daily sperm production (dsp) was at 45 million per day per testis (60). For each human that means ∼1,000 sperm are produced per second. A key to this level of gamete production is the organization and architecture of the mammalian testes that results in continuous sperm production. The seemingly complex repetitious relationship of cells termed the "cycle of the seminiferous epithelium" is driven by the continuous commitment of undifferentiated spermatogonia to meiosis and the period of time required to form spermatozoa. This commitment termed the A to A1 transition requires the action of retinoic acid (RA) on the undifferentiated spermatogonia or prospermatogonia. In stages VII to IX of the cycle of the seminiferous epithelium, Sertoli cells and germ cells are influenced by pulses of RA. These pulses of RA move along the seminiferous tubules coincident with the spermatogenic wave, presumably undergoing constant synthesis and degradation. The RA pulse then serves as a trigger to commit undifferentiated progenitor cells to the rigidly timed pathway into meiosis and spermatid differentiation.

Indexed as

MeiosisSpermatogenesisAnimalsCell LineageCell ProliferationHumansMaleMorphogenesisSignal TransductionSpermatozoaStem CellsTestisTretinoinTretinoin

Identifiers

PMID26537427
PMCPMC4698398
OpenAlexW2191459521

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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.