Related Experiment Video
Updated: Sep 13, 2025
Assessment of Perigenital Sensitivity and Prostatic Mast Cell Activation in a Mouse Model of Neonatal Maternal Separation
Published on: August 13, 2015
CPN2 alleviates cryptorchidism by inhibiting the NF-κB pathway and regulating immune responses
1Department of Urology, Affiliated Children's Hospital of Soochow University, Suzhou, China.
Abstract:
Cryptorchidism, a common male reproductive disorder characterized by undescended testes, is associated with infertility and increased cancer risk. While its etiology remains incompletely understood, accumulating evidence suggests that immune-inflammatory responses contribute to disease progression. This study investigated the role of carboxypeptidase N subunit 2 (CPN2) in modulating immune activation and testicular pathology via the NF-κB signaling pathway. Key regulatory genes were identified through transcriptomic analysis, weighted gene co-expression network analysis (WGCNA), and machine learning approaches. A di-n-butyl phthalate (DBP)-induced rat model of cryptorchidism and CRISPR/Cas9-mediated CPN2 knockout rats were employed, alongside histological, immunohistochemical, Western blotting, and co-culture assays to explore immune activation and spermatogonial cell fate. CPN2 was identified as a pivotal factor that suppresses NF-κB activation and plasma cell infiltration. Its overexpression alleviated inflammatory cytokine production, preserved spermatogonial stem cell proliferation, and reduced apoptosis in both in vivo and in vitro models. These effects were reversed upon NF-κB activation, confirming the regulatory role of the CPN2/NF-κB axis. Our findings reveal that CPN2 mitigates cryptorchidism progression by modulating immune-inflammatory responses, highlighting it as a promising molecular target for non-surgical intervention in this condition.
Insights
Carboxypeptidase N subunit 2 (CPN2) suppresses immune activation in cryptorchidism. CPN2 protects against testicular damage by inhibiting the NF-κB pathway, offering a potential non-surgical treatment target.
Area of Science:
- Reproductive Biology
- Immunology
- Molecular Biology
Background:
- Cryptorchidism (undescended testes) is linked to infertility and cancer.
- Immune-inflammatory responses are implicated in cryptorchidism pathogenesis.
- The specific molecular mechanisms, particularly involving immune modulation, require further elucidation.
Purpose of the Study:
- To investigate the role of carboxypeptidase N subunit 2 (CPN2) in cryptorchidism.
- To determine CPN2's influence on immune activation and testicular pathology via the NF-κB signaling pathway.
- To identify CPN2 as a potential therapeutic target for cryptorchidism.
Main Methods:
- Transcriptomic analysis, WGCNA, and machine learning identified key genes.
- Utilized a di-n-butyl phthalate (DBP)-induced rat model and CRISPR/Cas9 CPN2 knockout rats.
- Employed histological, immunohistochemical, Western blotting, and co-culture assays to assess immune responses and cell fate.
Main Results:
- CPN2 was identified as a key factor suppressing NF-κB activation and plasma cell infiltration.
- CPN2 overexpression reduced inflammatory cytokines, preserved spermatogonial stem cell proliferation, and decreased apoptosis.
- The CPN2/NF-κB axis was confirmed as regulatory, with effects reversed upon NF-κB activation.
Conclusions:
- CPN2 mitigates cryptorchidism progression by modulating immune-inflammatory responses.
- CPN2 acts by suppressing NF-κB signaling and subsequent inflammation.
- CPN2 represents a promising molecular target for non-surgical interventions in cryptorchidism.
Related Concept Videos
02:26NF-κB-dependent Signaling Pathway
NF-κB-dependent Signaling Mechanism
The...
01:28Nitric Oxide Signaling Pathway