Phosphate Improves Mitochondrial Function and Reduces Pancreatitis in Hypertriglyceridemia
Nidula Mullappilly1, Sandip M Swain1, Joelle M-J Romac1
1Department of Medicine, Duke University, North Carolina, USA.
Summary
Phosphate supplementation protects against hypertriglyceridemia-associated pancreatitis (HTGP). It corrects calcium imbalance and mitochondrial dysfunction, reducing pancreatic inflammation and injury in mice.
Area of Science:
- Biochemistry
- Cell Biology
- Gastroenterology
Background:
- Hypertriglyceridemia-associated pancreatitis (HTGP) is a significant cause of acute pancreatitis, but its underlying mechanisms remain unclear.
- Hypophosphatemia, a state of low phosphate levels, is frequently observed in pancreatitis patients and linked to metabolic disorders and dyslipidemia.
Purpose of the Study:
- To investigate the critical role of phosphate status in the development of HTGP.
- To determine if phosphate supplementation can mitigate pancreatic injury in a hypertriglyceridemia mouse model.
Main Methods:
- Utilized an APOC3 transgenic mouse model of hypertriglyceridemia.
- Assessed pancreatic injury markers, including intra-acinar calcium levels, mitochondrial function, myeloperoxidase, and proinflammatory cytokines.
- Evaluated the effects of phosphate supplementation on these markers and on caerulein-induced pancreatitis.
Main Results:
- Hypertriglyceridemic mice showed pancreatic injury, elevated non-ER organelle calcium, impaired mitochondrial function, and increased inflammation.
- Phosphate supplementation normalized calcium levels, restored mitochondrial function, and reduced inflammation and pancreatic injury.
- Phosphate supplementation also lessened the severity of pancreatitis in mice on a low-phosphate diet under hypertriglyceridemic conditions.
Conclusions:
- Phosphate plays a crucial protective role in the pancreas during hypertriglyceridemia.
- Phosphate supplementation ameliorates HTGP by restoring calcium homeostasis and mitochondrial function, and by reducing inflammation.
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