Oral lesions in elderly patients of a community in Brazilian Northeast.

OBJECTIVE: To investigate the oral soft-tissue injuries in people aged 60 or older. METHODS: Cross-sectional research conducted with 262 elders aged 60-93 years (mean 69.84, SD ± 6.212) from the Dende community in Northeast, Brazil. Data were collected through an identification questionnaire and the Community Indicator in Oral Health. Data were computed by the Software SPSS, version 15. RESULTS: There was a predominance of female gender (64.1%), retired, low schooling and income of up to one minimum wage. It was detected a prevalence of soft-tissue injuries in 38.4% (n = 101) of the elders, distributed as follows: red spots 60(57.7%), blisters 20(19.2%), lesions and/or wound 16(15.4%), and white spot 8(7.7%). Among the elders, 40(15.3%) smoked and 20(7.6%) used alcohol. It was verified a statistical association between injuries and using prosthesis (p = 0.039), medicine (p = 0.023) and calculus (p = 0.016). CONCLUSION: The oral health of this population is precarious, and there is a high prevalence of oral lesions.

Serotonin regulates an acyl-CoA-binding protein (ACBP) gene expression in the midgut of Rhodnius prolixus.

Acyl-CoA esters have many intracellular functions, acting as energy source, substrate for metabolic processes and taking part in cell signaling. The acyl-CoA-binding protein (ACBP), a highly conserved 10 kDa intracellular protein, binds long- and medium-chain acyl-CoA esters with very high affinity, directing them to specific metabolic routes and protecting them from hydrolysis. An ACBP gene sequence was identified in the genome of Rhodnius prolixus. This ACBP gene (RpACBP-1) was expressed in all analyzed tissues and quantitative PCR showed that expression was highest in posterior midgut. In this tissue, ACBP gene expression increased in the first day after blood meal ( approximately 10-fold) and then decreased to unfed levels in the seventh day after meal. Injection of serotonin (5-hydroxytryptamine; 5-HT), a neuroamine released in the hemolymph after the start of feeding, increased the expression of this gene in the midgut of unfed females, reaching levels similar to those observed in fed insects. This effect of injected 5-HT was inhibited by spiperone, an antagonist of 5-HT mammalian receptors, that was also able to block the physiological increase in RpACBP-1 expression observed after feeding. Injection of cholera toxin or dibutyryl-cAMP also resulted in the stimulation of this gene expression. These data reveal a transcriptional regulatory mechanism in R. prolixus, that is triggered by 5-HT. In this way, a novel role for 5-HT is proposed, as a regulator of ACBP gene expression and, consequently, taking part in the control of lipid metabolism.