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Journal of Dental Research
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Destruction of Parotid Glands Affects Nitrate and Nitrite Metabolism

D.S. Xia1, D.J. Deng2,* and S.L. Wang1,*

1 Salivary Gland Disease Center, Faculty of Stomatology, Capital University of Medical Sciences, Tian Tan Xi Li, No. 4, Beijing 100050, PR China; and
2 Peking University School of Oncology & Beijing Institute for Cancer Research, Beijing 100034, PR China;


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  		Figure 1. Nitrate concentration (µg/mL) in mixed saliva, serum, and urine of miniature pigs before and after nitrate loading. Data are given as mean ± SD (n = 5). {circ}, control group, no KNO3 treatment; •, test group, no KNO3 treatment; {square}, control group, KNO3 treatment; {blacksquare}, test group, KNO3 treatment. (A) Mixed saliva samples. Concentration of nitrate in the test group (bilateral ablation of the parotid glands) is significantly lower than that in the control group before and after nitrate loading (p < 0.05). Higher concentration of nitrate was induced by nitrate loading in both groups (p < 0.05). (B) Serum samples and (C) urine samples. Similar concentrations of nitrate were detected in both groups before nitrate loading. Higher concentrations of nitrate were induced by nitrate loading. The concentration of nitrate in the test group was much higher than that in the control group after nitrate loading (P < 0.001).

 

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  		Figure 2. Nitrite concentration (µg/mL) in mixed saliva of miniature pigs before and after nitrate loading. Data are given as mean ± SD (n = 5). {circ}, control group, no KNO3 treatment; •, test group, no KNO3 treatment; {square}, control group, KNO3 treatment; {blacksquare}, test group, KNO3 treatment. The background concentration of nitrite in the test group (bilateral ablation of the parotid glands) was significantly lower than that in the control group (P < 0.001). No significant change of nitrite concentration was found in the control group after nitrate loading. Restoration of nitrite concentration to normal level of the control group was found in the test group after nitrate loading.

 

Journal of Dental Research, Vol. 82, No. 2, 101-105 (2003)
DOI: 10.1177/154405910308200205
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