Evidence map›Paper›PMID 30377394›Full record

ReviewReproductive medicine and biology2018

In vitro spermatogenesis: A century-long research journey, still half way around.

Mitsuru Komeya, Takuya Sato, Takehiko Ogawa

Open access · goldAbstract readReview
In one paragraph

Review in Reproductive medicine and biology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
7.2field-weighted citation impact, top 3% 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

31 citing papers in PubMed, 63 citations in OpenAlex.

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  9. Puberty Blocker and Aging Impact on Testicular Cell States and Function.bioRxiv : the preprint server for biology · 2024
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  17. Mini Bioreactor Can SupportCell journal · 2022
    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

3 authors at 1 institution in 1 country.

Mitsuru KomeyaDepartment of Urology Yokohama City University Graduate School of Medicine Yokohama Kanagawa Japan.ORCID 0000-0002-0744-7492
Takuya SatoLaboratory of Biopharmaceutical and Regenerative Sciences Institute of Molecular Medicine and Life Science Yokohama City University Association of Medical Science Yokohama Kanagawa Japan.
Takehiko OgawaDepartment of Urology Yokohama City University Graduate School of Medicine Yokohama Kanagawa Japan.ORCID 0000-0002-1422-0317
Yokohama City University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSpermatogenesis is one of the most complicated cellular differentiation processes in a body. Researchers struggled to find and develop a micro-environmental condition that can support the process in vitro. Such endeavors can be traced back to a century ago and are yet continuing.

methodsReports on in vitro spermatogenesis and related works were selected and classified into four categories based on the method used; organ culture, tubule culture, cell culture, and 3-dimensional cell culture methods. Each report was critically reviewed from the present point of view by authors who have been working on in vitro spermatogenesis with organ culture method over a decade.

resultsThe organ culture method has the longest history and is the most successful method, which produced fertile mouse sperm from spermatogonial stem cells. Formulation of the medium was a key factor, most importantly serum-derived substances. However, factors in the serum that induce and support spermatogenesis in the cultured tissue remain to be identified. In addition, the success of mouse spermatogenesis is yet to be applied to other animals. On looking into the history of cell culture method, it became clear that Sertoli cells as feeder cells play an important role. Even with Sertoli cells, however, spermatogenic development has been limited to small parts of spermatogenesis, a segmented period of meiotic prophase for instance. Recent developments of organoid or 3-dimensional culture techniques are promising but they still need further refinements.

conclusionThe study of in vitro spermatogenesis progressed significantly over the last century. We need more work, however, to establish a culture system that can induce and maintain complete spermatogenesis of many if not all mammalian species.

Indexed as

cell culturein vitro spermatogenesismale infertilitymicrofluidicsorgan culture

Identifiers

PMID30377394
PMCPMC6194268
OpenAlexW2887754886

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.