Recombinant Amelogenin Protein Induces Apical Closure and Pulp Regeneration in Open-apex, Nonvital Permanent Canine Teeth.

BACKGROUND

Recombinant DNA-produced amelogenin protein compared with the calcium hydroxide in the study of peak closing immature conducted in 24 young dog.

METHOD

premolar tooth root canal right maxillary and mandibular (n = 240) were instrumented and left open for 14 days. Canals were cleaned, irrigation, and divide equally to treatment with recombinant mouse amelogenin (n = 120) or calcium hydroxide (n = 120).

RESULTS

After 1, 3, and 6 months, the Ovine Recombinant Proteins animals were sacrificed and dental care and recovered for histological assessment Immunodetection protein markers associated with odontogenic cells. After 1 month, canal-treated amelogenin revealed calcified tissue formed at the apical foramen and the pulp chamber that contains soft connective tissue and hard tissue; amelogenin canal-treated assessed after intervals of 3 and 6 months including functional apical tissue attached to the bone by the periodontal ligament. Conversely, poorly calcified apical tissue is formed within the group of calcium hydroxide, and soft connective tissue in the pulp chamber is not observed.

CONCLUSION

The findings of this experimental strategy showed amelogenin recombinant proteins can signal cells to improve the apex formation in adult non-vital teeth and promote regeneration of soft connective tissue.

Recombinant protein expression, family A2, of Leishmania infantum (Jaboticabal strain) and evaluation in Canine Visceral Leishmaniasis serology test.

This study aimed to express A2 recombinant protein of Leishmania chagasi family, Jaboticabal strain; examine this protein as an antigen in a serological test; and investigate the antigenicity and immunogenicity. A protein encoded by the A2 allele of a gene isolated from L. chagasi expressed in three different strains of Escherichia coli. 

We used 29 sera samples from dogs Leishmune-vaccinated, 482 serum samples of dogs from endemic areas (positive control), and 170 sera samples from dogs from non-endemic areas (negative control) in ELISA tests using soluble Leishmaniaantigen (SLA) and his A2 as the antigen. Expressed protein indicates, Western blotting, the expression of 11 KDa protein. Sixty-three percent (303/482) of the samples from endemic areas of his positive ELISA-A2, while 93.1% (27/29) of vaccinated animals Leishmune®-negative by him-A2-ELISA. Porcine Recombinant Proteins

 Anti-A2 antibodies from mice inoculated with A2 protein was detected in the slide containing amastigote forms, but not in the slide that contains promastigote forms. A2 from L. chagasi recombinant protein may be a useful tool in the diagnosis of CVL, and further tests on the stage of infection and parasite specie where the dog samples should provide a better understanding of our results.