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Oral Arginine Reduces Systemic Blood Pressure in Type 2 Diabetes: Its Potential Role in Nitric Oxide Generation

Nhan T. Huynh, BS and John A. Tayek, MD

Department of Internal Medicine, Harbor-UCLA Medical Center, UCLA School of Medicine, Torrance, California



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Fig. 1. This figure demonstrates the mean plasma arginine concentration with or without oral arginine supplements.

 


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Fig. 2. This figure demonstrates the mean ornithine with or without oral arginine supplements. There was a significant difference by ANOVA (p < 0.01) and a significant increase over time (p < 0.05).

 


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Fig. 3. This figure demonstrates the mean citrulline concentration while taking oral arginine supplements. The mean difference between the arginine and the non-arginine ingestion day was significant (p < 0.05). Individual determinations at each time point resulted in significant differences at time 10:00 and 12:00 after correction for multiple comparisons (p < 0.05).

 


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Fig. 4. This figure demonstrates the hourly mean systolic blood pressure (mean ± SEM) in volunteers with or without oral arginine supplements. ANOVA testing demonstrated a significant difference during the treatment period (Hour 5:00 to Hour 14:00, i.e., 5:00 AM to 2:00 PM). The effect of arginine on systolic blood pressure was not significant until 7:00 AM. There was no difference between groups after arginine was discontinued (Hours 15:00 and 16:00). Please note that the arginine was stopped at hour 14:00 or 2:00 PM. The hypotensive influence was not present one hour after stopping the arginine for systolic measurements. A significant difference between the two groups at each time point by paired testing is indicated by a star (p < 0.05).

 


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Fig. 5. This figure demonstrates the hourly mean diastolic blood pressure in volunteers with or without oral arginine supplements. ANOVA testing demonstrated a significant difference during the treatment period (Hour 5:00 to Hour 14:00, i.e., 5:00 AM to 2:00 PM). There was no difference between groups after arginine was discontinued (Hour 15:00, 16:00 and 24:00 or 0:00). Please note that the arginine was stopped at hour 14:00 or 2:00 PM. The hypotensive influence was not present one hour after stopping the arginine. Significant difference between the two groups at each time point by paired testing is indicated by a star (p < 0.05).

 





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