Complement Receptor 1 (CR1)/ CD35+ Expression Analysis of Salivary Neutrophils on Streptococcus mutans Phagocytosis

Severe early childhood caries (S-ECC) is a form of dental caries which is very destructive in early childhood since involving several teeth, include the maxillary anterior teeth. Streptococcus mutans (S. mutans) play an etiological integral role of ECC so that S. mutans are considered as the predictor of dental caries. The neutrophil is a key component of the rst line of defense against microbial invasion. The essential function of neutrophil is to kill pathogenic microbes through a phagocytosis process which is mediated by Complement Receptor 1 (CR1)/ (CD35⁺).

To analyze the phagocytosis process of the salivary neutrophil which is mediated by innate immunity component, i.e., Complement Receptor 1/CR1 (CD35) on S-ECC.

his study was an observational analysis with cross-sectional approach using t-test analysis. This study employed the isolation steps of neutrophils saliva of caries-free children and the S-ECC and then conducted phagocytosis of salivary neutrophils test on S. mutans mediated by CD35 using ow cytometry.

Phagocytosis of salivary neutrophils on S. mutans mediated by CD35 on caries-free (2.35 ± 0.56) is higher than that on the S-ECC (1.54 ± 0.35).

It is concluded that there is a decrease of phagocytic on S. mutans mediated by Complement Receptor 1/CR1 (CD35+) on S-ECC.