Depression of serum calcium by increased plasma free fatty acids in the rat: a mechanism for hypocalcemia in acute pancreatitis
- A L Warshaw , K H Lee , T W Napier , P O Fournier , D Duchainey , L Axelrod
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View abstract on PubMed
Summary
This summary is machine-generated.High free fatty acids (FFAs) in the blood can significantly lower calcium levels. This study shows FFAs bind to calcium, potentially causing hypocalcemia in conditions like acute pancreatitis.
Area Of Science
- Biochemistry
- Endocrinology
- Pathophysiology
Background
- Hypertriglyceridemia and acute pancreatitis can lead to hypocalcemia and elevated plasma free fatty acids (FFAs).
- The mechanism of hypocalcemia in these conditions is not fully understood and may differ from local calcium soap formation.
Purpose Of The Study
- To test the hypothesis that increased plasma FFAs directly reduce calcium levels in vivo.
- To investigate the relationship between FFA concentration and calcium levels in a rat model.
Main Methods
- Induced elevated FFAs in rats using heparin and triglyceride infusions.
- Measured plasma calcium and FFA concentrations before and after induction.
- Conducted in vivo and in vitro studies to assess FFA-albumin binding and triglyceride interference.
Main Results
- Elevated FFAs significantly reduced calcium concentration in rats (p < 0.001).
- A positive correlation was observed between baseline FFA levels and calcium's responsiveness to FFA challenge.
- FFA-albumin complexes were shown to bind calcium, lowering its measured value.
Conclusions
- Spontaneous changes in FFA concentration can affect measured serum calcium.
- Hypocalcemia in acute pancreatitis may be partly due to intravascular calcium sequestration by FFAs.
- Increased FFA levels in pancreatitis could exacerbate hypocalcemia, potentially impairing parathyroid hormone function.
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