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Summary
Diabetic patients exhibit altered oxyhemoglobin dissociation curves (ODC) due to changes in red blood cell 2,3-diphosphoglycerate (2,3-DPG) and inorganic phosphate (Pi). Supplementing diabetic diets with dibasic calcium phosphate can normalize ODC and improve oxygen delivery.
Area of Science:
- Biochemistry
- Physiology
- Endocrinology
Background:
- Diabetic patients often present with altered oxygen-hemoglobin binding characteristics.
- Red blood cell 2,3-diphosphoglycerate (2,3-DPG) and inorganic phosphate (Pi) levels influence the oxyhemoglobin dissociation curve (ODC).
Purpose of the Study:
- To investigate the oxyhemoglobin dissociation curves (ODC) in diabetic and nondiabetic subjects.
- To explore the relationship between ODC, 2,3-diphosphoglycerate (2,3-DPG), and inorganic phosphate (Pi) in diabetes management.
Main Methods:
- Developed oxyhemoglobin dissociation curves (ODC) from whole blood tests.
- Measured P50, 2,3-diphosphoglycerate (2,3-DPG), and inorganic phosphate (Pi) levels.
- Administered diphosphonate (EHDP) and dibasic calcium phosphate to assess their effects on P50 and Pi.
Main Results:
- Diabetic subjects showed a lower P50, indicating a left-shifted ODC, despite increased 2,3-DPG.
- ODC position correlated positively with 2,3-DPG and varied with Pi levels.
- Supplementation with EHDP and dibasic calcium phosphate increased Pi and P50 in both healthy and diabetic individuals.
Conclusions:
- Altered ODC in diabetes is linked to 2,3-DPG and Pi concentrations.
- Dietary supplementation with dibasic calcium phosphate may improve red cell oxygen delivery in diabetics.
- Optimizing metabolic control and Pi levels can normalize ODC in diabetic patients.