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Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
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Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway
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Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway

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Complement activation and effector pathways in membranous nephropathy.

Andreas D Kistler1, David J Salant2

  • 1Department of Medicine, Cantonal Hospital Frauenfeld, Spital Thurgau AG, Frauenfeld, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland.

Kidney International
|December 23, 2023
PubMed
Summary
This summary is machine-generated.

Complement activation is key in membranous nephropathy (MN). Targeting specific complement pathways offers a promising adjunctive treatment for MN patients, especially when B-cell depletion alone is insufficient.

Keywords:
complementglomerulonephritisglomerulusmembranous nephropathyproteinuria

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Area of Science:

  • Nephrology
  • Immunology
  • Molecular Medicine

Background:

  • Complement activation is a known hallmark of membranous nephropathy (MN).
  • Previous evidence stemmed from detecting complement products in patient biopsies and urine, and from animal models like passive Heymann nephritis.
  • Recent advancements provide deeper insights into complement activation mechanisms and effector pathways.

Purpose of the Study:

  • To review the evidence supporting the central role of complement in MN.
  • To highlight the relevance of distinct complement activation and effector pathways in MN.
  • To discuss recent developments in understanding complement's role and therapeutic targeting in MN.

Main Methods:

  • Analysis of patient data.
  • Studies using animal models of MN.
  • In vitro models utilizing specific target antigens relevant to human MN.
  • Review of existing literature on complement activation in MN.

Main Results:

  • Complement activation is integral to the pathogenesis of MN.
  • Specific complement pathways are relevant to MN, with ongoing podocyte injury observed despite B-cell depletion.
  • Recent research elucidates detailed mechanisms of complement activation and effector functions in MN.

Conclusions:

  • Complement activation plays a critical role in MN.
  • Targeting complement pathways is a potential therapeutic strategy for MN, particularly as an adjunct to existing treatments.
  • Tailoring complement inhibition to specific pathways involved in MN is crucial for effective treatment.