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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Andrologyarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Andrology
Article . 2026 . Peer-reviewed
License: Wiley Online Library User Agreement
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Genetic Association of RXFP2 T222P Variant With Cryptorchidism: A Meta‐Analytic Study

Authors: Jacek Kabziński; Jerzy Niedzielski; Ireneusz Majsterek;

Genetic Association of RXFP2 T222P Variant With Cryptorchidism: A Meta‐Analytic Study

Abstract

ABSTRACT Background The RXFP2 receptor plays a key role in testicular descent, mediating the action of relaxin on gubernaculum development. The T222P polymorphism in the RXFP2 gene has previously been investigated in relation to cryptorchidism, but reported associations have been inconsistent across populations. Objectives The aim of this meta‐analysis was to assess the association of the T222P variant in the RXFP2 gene with the risk of cryptorchidism and to analyze effect‐modifying factors, including population structure and allele frequencies in control groups. Materials and Methods A systematic literature review was conducted in PubMed, Embase, Web of Science, Scopus, and supplementary sources. Five studies with genotypic data for the T222P variant in case and control populations were selected. Allele and genotype frequencies were calculated, followed by cumulative OR values with 95% confidence intervals. Between‐study heterogeneity was assessed using the I 2 statistic, and moderator analyses (Italy vs. other countries and P allele frequency in controls) as well as leave‐one‐out sensitivity analyses were performed. Study quality was assessed using the Newcastle–Ottawa Scale. Results Carriers of the T222P variant showed a trend toward increased odds of cryptorchidism, with a more pronounced effect observed in Italian cohorts. Heterogeneity was moderate ( I 2 ≈ 50%), and moderator analysis suggested that population differences and P allele frequency in controls may contribute to variability in effect estimates. Sensitivity analyses and alternative genotype models supported the consistency of the findings across analytical approaches. Discussion The results support a potential association between the RXFP2 T222P variant and cryptorchidism risk, with population‐specific effects likely reflecting underlying genetic background. Conclusion The RXFP2 T222P variant may be associated with an increased risk of cryptorchidism, but current evidence remains hypothesis‐generating. Further studies in larger, ethnically diverse samples, with full genotyping and functional analysis, are needed to confirm and elucidate the mechanisms underlying the observed effect.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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