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Updated: May 21, 2026
Technique to Target Microinjection to the Developing Xenopus Kidney
Published on: May 3, 2016
Xenopus as a model system for the study of GOLPH2/GP73 function: Xenopus GOLPH2 is required for pronephros
1State Key Laboratory of Respiratory Disease, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China.
Abstract:
GOLPH2 is a highly conserved protein. It is upregulated in a number of tumors and is being considered as an emerging biomarker for related diseases. However, the function of GOLPH2 remains unknown. The Xenopus model is used to study the function of human proteins. We describe the isolation and characterization of Xenopus golph2, which dimerizes and localizes to the Golgi in a manner similar to human GOLPH2. Xenopus golph2 is expressed in the pronephros during early development. The morpholino-mediated knockdown of golph2 results in edema formation. Additionally, Nephrin expression is enhanced in the glomus, and the expression of pronephric marker genes, such as atp1b1, ClC-K, NKCC2, and NBC1, is diminished in the tubules and duct. Expression patterns of the transcription factors WT1, Pax2, Pax8, Lim1, GATA3, and HNF1β are also examined in the golph2 knockdown embryos, the expression of WT1 is increased in the glomus and expanded laterally in the pronephric region. We conclude that the deletion of golph2 causes an increase in the expression of WT1, which may promote glomus formation and inhibit pronephric tubule differentiation.
Insights
Golgi phosphoprotein 2 (GOLPH2) is crucial for kidney development. Its knockdown in Xenopus embryos causes edema and disrupts pronephric development by altering WT1 expression.
Area of Science:
- Developmental Biology
- Molecular Biology
- Biochemistry
Background:
- Golgi phosphoprotein 2 (GOLPH2) is a conserved protein upregulated in tumors, suggesting potential as a disease biomarker.
- The precise biological function of GOLPH2 remains largely uncharacterized.
- The Xenopus model offers a valuable system for investigating the function of human proteins.
Purpose of the Study:
- To isolate and characterize Xenopus golph2.
- To elucidate the role of golph2 in early embryonic development, specifically in the pronephros.
- To investigate the downstream effects of golph2 knockdown on gene expression and kidney formation.
Main Methods:
- Isolation and characterization of Xenopus golph2.
- Morpholino-mediated knockdown of golph2 in Xenopus embryos.
- Analysis of pronephric development, including edema formation and gene expression.
- Examination of transcription factor expression patterns (WT1, Pax2, Pax8, Lim1, GATA3, HNF1β).
Main Results:
- Xenopus golph2 dimerizes and localizes to the Golgi, similar to human GOLPH2.
- Golph2 knockdown leads to edema and impaired pronephric development.
- Nephrin expression is upregulated in the glomus, while key pronephric marker genes are downregulated in tubules and ducts.
- WT1 expression increases in the glomus and expands laterally in golph2 knockdown embryos.
Conclusions:
- Golph2 plays a critical role in Xenopus pronephric development.
- Golph2 deletion results in altered WT1 expression, potentially driving glomus formation and inhibiting tubule differentiation.
- These findings provide insights into the function of GOLPH2 in kidney development and disease.
