Abstract
Infantile chronic recurrent parotitis (ICRP) is an insidious disease whose etiopathogenesis remains an enigma. Alterations in the physical appearance of parotid saliva from ICRP patients have been frequently reported. However, sialochemical studies in regard to ICRP are very rare. The aim of this study was to determine whether saliva of ICRP patients presents major physicochemical and biochemical alterations compared with saliva from paired healthy controls. Parotid, whole, and submandibular/sublingual saliva was collected at an asymptomatic stage from 33 ICRP patients (5–16 y old, both sexes) and from 33 sex- and age-matched healthy controls. Saliva was analyzed for protein concentration, mode of protein diffusion on cellulose membranes, unidimensional sodium dodecylsulfate (SDS)–polyacrylamide gel electrophoresis protein profiles and zymographic profiles of metalloproteinase 2 (MMP-2) and metalloproteinase 9 (MMP-9). Parotid saliva of ICRP patients showed an increased protein concentration, altered mode of protein diffusion, a higher frequency of polypeptide bands of 43, 37, 33, 29, 26, 16, and 10 kD, higher asymmetry in the polypeptide profiles of both contralateral parotid saliva, and an increase in the frequency of MMP-2 and MMP-9. Parotid saliva of patients with ICRP is molecularly altered with respect to normal saliva. Some of the molecular differences could be related to the etiopathogenesis of the disease.
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Abbreviations
- ICRP:
-
infantile chronic recurrent parotitis
- MMP-2:
-
metalloproteinase 2
- MMP-9:
-
metalloproteinase 9
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Acknowledgements
The authors are grateful of Dr. M.A. Valenzuela for providing MMP-2 and MMP-9 markers and Dr. R.O. López-Solís for helpful discussion of the manuscript.
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This study was supported in part by University of Chile: Grants DI-MULT 05/35-2; DI-ODO 007/2 and PRI-ODO 04/23.
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Morales-Bozo, I., Urzúa-Orellana, B., Landaeta, M. et al. Molecular Alterations of Parotid Saliva in Infantile Chronic Recurrent Parotitis. Pediatr Res 61, 203–208 (2007). https://doi.org/10.1203/pdr.0b013e31802d77b5
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DOI: https://doi.org/10.1203/pdr.0b013e31802d77b5
