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Updated: Dec 4, 2025

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New COL4A5 mutation in IgA nephropathy.

Zhenjian Xu1, Junzhe Chen1,2, Wenjuan Yu1,2

  • 1Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.

Postgraduate Medical Journal
|October 22, 2020
PubMed
Summary
This summary is machine-generated.

A new COL4A5 gene mutation was identified in a Chinese family with IgA nephropathy (IgAN). This finding highlights the importance of genetic screening for IgAN, especially in familial cases.

Keywords:
Chronic renal failureNephrology

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Area of Science:

  • Nephrology
  • Genetics
  • Molecular Biology

Background:

  • IgA nephropathy (IgAN) is a primary glomerulonephritis and a leading cause of chronic kidney disease (CKD) and end-stage kidney disease (ESKD).
  • Recent reports suggest a link between COL4A5 gene mutations and IgAN.
  • This study focuses on a Chinese family with IgAN.

Purpose of the Study:

  • To identify and characterize a novel COL4A5 gene mutation in a Chinese family diagnosed with IgA nephropathy.
  • To investigate the pathogenicity of the identified mutation.

Main Methods:

  • Whole-exome sequencing and Sanger sequencing were performed on affected family members.
  • Vector transcription and Minigene transcriptional analyses were used to verify mutation pathogenicity.

Main Results:

  • A novel insertion mutation in the COL4A5 gene (chrX:107 814 698, c.438+2->AAACCAATTATA-) was identified.
  • The pathogenicity of this novel COL4A5 mutation was confirmed through functional analyses.

Conclusions:

  • The findings suggest that genetic screening for COL4A5 mutations is warranted in patients with IgAN, particularly those with a family history.
  • Further research is needed to understand the impact of different COL4A5 splice site mutations on IgAN pathogenesis and prognosis.