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The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
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The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
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PNPLA3 variation and kidney disease.

Alessandro Mantovani1, Giovanni Targher2,3

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Summary
This summary is machine-generated.

The PNPLA3 rs738409 G allele is linked to worse kidney function and increased chronic kidney disease (CKD) risk. This genetic variant may directly impact kidney health or indirectly through metabolic dysfunction-associated steatotic liver disease (MASLD).

Keywords:
CKDMASLDPNPLA3chronic kidney diseasekidney diseasemetabolic dysfunction‐associated steatohepatitismetabolic dysfunction‐associated steatotic liver diseasepatatin‐like phospholipase domain containing 3

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Area of Science:

  • Genetics
  • Nephrology
  • Hepatology

Background:

  • The PNPLA3 rs738409 G allele is a strong genetic risk factor for MASLD.
  • This allele is also associated with impaired kidney function across age groups and independent of other risk factors.

Purpose of the Study:

  • To review epidemiological data on the association between the PNPLA3 rs738409 G allele and CKD risk.
  • To explore potential biological mechanisms linking PNPLA3 to kidney disease.
  • To discuss clinical implications for identifying individuals at risk.

Main Methods:

  • Narrative minireview of existing epidemiological studies.
  • Discussion of experimental evidence on PNPLA3 expression in renal cells.
  • Synthesis of current knowledge on the genetic link between PNPLA3, MASLD, and CKD.

Main Results:

  • Strong epidemiological evidence links the PNPLA3 rs738409 G allele to impaired kidney function and increased CKD risk.
  • PNPLA3 is expressed in kidney cells, suggesting a potential direct role in renal pathology.
  • The association may be partly mediated by MASLD development and progression.

Conclusions:

  • The PNPLA3 rs738409 G allele is a significant risk factor for CKD, potentially through direct renal effects or MASLD.
  • Identifying PNPLA3 genotype may aid in stratifying risk for both CKD and advanced MASLD.
  • Further research is needed to fully elucidate the mechanisms and clinical utility.