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Animal models of pathologic calcification.
1Division of Rheumatology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA. imasuda@mcw.edu
Current Opinion in Rheumatology
|May 1, 2002
Summary
Genetic insights reveal the ANK protein
Area of Science:
- Genetics
- Molecular Biology
- Biochemistry
Background:
- Pathologic calcification in soft tissues and joints is a complex process.
- Abnormal extracellular pyrophosphate (ePPi) metabolism is linked to various calcification disorders.
- Genetic factors play a crucial role in regulating ePPi levels and calcification.
Purpose of the Study:
- To investigate the molecular basis of pathologic calcification in mice.
- To elucidate the role of the ANK protein in inorganic pyrophosphate (PPi) transport and metabolism.
- To explore the connection between ANK, ePPi levels, and human genetic disorders associated with calcification.
Main Methods:
- Utilizing genetic and mouse genomics approaches.
- Analyzing the function of the ANK transmembrane protein.
- Correlating genetic loci with familial chondrocalcinosis and examining ePPi metabolism in knockout mouse models.
Main Results:
- The ANK protein is identified as a potential inorganic pyrophosphate (PPi) transporter or regulator.
- Altered ePPi metabolism is associated with basic calcium phosphate (BCP) and calcium pyrophosphate dihydrate (CPPD) crystal deposition.
- Deficiencies in ePPi generation lead to ectopic calcification and ossification in specific mouse models.
Conclusions:
- The ANK protein is a key regulator of extracellular pyrophosphate (ePPi) metabolism.
- ePPi plays a critical role in both pathologic and physiologic calcification processes.
- Understanding ANK and ePPi pathways offers insights into treating calcification disorders.