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Muscle and Bone Impairment in Infantile Nephropathic Cystinosis: New Concepts

Dieter Haffner1,2, Maren Leifheit-Nestler1,2, Candide Alioli3

  • 1Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.

Cells
|January 11, 2022
PubMed

Insights

Cystinosis Metabolic Bone Disease (CMBD) is a serious complication of infantile nephropathic cystinosis (INC). New research highlights abnormal mineral regulation, inflammation, and bone-muscle interactions in CMBD.

Area of Science:

  • Nephrology
  • Endocrinology
  • Genetics

Background:

  • Cystinosis Metabolic Bone Disease (CMBD) is a recognized long-term complication in infantile nephropathic cystinosis (INC).
  • CMBD significantly impacts the quality of life for teenagers and adults with INC.
  • Its pathophysiology is complex, involving multiple factors beyond typical chronic kidney disease bone disorders.

Purpose of the Study:

  • To summarize recent findings on the pathophysiological deregulations in CMBD.
  • To discuss the interplay between bone and muscle in INC patients with CMBD.
  • To explore potential future therapeutic strategies for CMBD.

Main Methods:

  • Review of recent research data on CMBD.
  • Analysis of mineral regulation, cellular bone defects, and inflammation in INC.
  • Discussion of the bone-muscle axis in the context of INC.

Main Results:

  • Abnormal mineral regulation, intrinsic bone defects, and cysteamine toxicity are implicated in CMBD.
  • Muscle wasting and interleukin-1-driven inflammation are key features of CMBD.
  • A complex interplay exists between bone and muscle pathology in INC.

Conclusions:

  • Understanding CMBD's complex pathophysiology is crucial for managing INC patients.
  • Future therapies targeting vitamin D or IL1β may address muscle wasting and CMBD.
  • Further research is needed to validate the efficacy of proposed biotherapies.

Keywords:
bone-muscle wastingcysteaminefibroblast growth factor 23fracturesinfantile nephropathic cystinosisleptinosteoclastssclerostin

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