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AnÃlise do perfil de proteÃnas salivares, experiÃncia de cÃrie, nÃvel de Streptococcus mutans em populaÃÃo de crianÃas desnutridas / Analysis of salivaries proteins profile, carie experience and salivary mutans Streptococci levels in population of malnourished children.Ana Catarina de Miranda Mota 08 October 2008 (has links)
FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / O presente estudo compara experiÃncia (ceo-s) e severidade da cÃrie de primeira
infÃncia (S-CPI), nÃveis salivares de estreptococos do grupo mutans (EGM), concentraÃÃo de
proteÃna total salivar (CPT) e perfi l protÃico salivar (PPS), entre crianÃas nutridas e desnutridas.
Cento e vinte crianÃas desnutridas, com 12 e 70 meses de idade, com e sem experiÃncia de
cÃrie, foram divididas entre os graus de desnutriÃÃo de acordo com a OMS: leve (GI, n=31),
moderado (GII, n=59) e grave (GIII, n=31). Quarenta e sete crianÃas nutridas (GN) participaram
do experimento como controle. Saliva total nÃo estimulada foi coletada de todos os participantes
e centrifugada; o sobrenadante foi retido, liofi lizado, armazenado a -20Â C e analisado para CPT
pelo mÃtodo de Bradford e eletroforese em gel de poliacrilamida-SDS pelo mÃtodo de Laemmli.
Saliva total estimulada foi coletada e utilizada para detecÃÃo de EGM no meio MSB (ufc/mL).
Exame dental foi realizado e calculado o Ãndice ceo-s e S-CPI. As variÃveis idade ( p= 0,0000),
logaritmo da contagem de EGM (p=0,0321) e estado nutricional (p=0,0316) apresentaram
contribuiÃÃo positiva para o desenvolvimento da cÃrie dentÃria. As variÃveis sexo (p=0,7094)
e CPT (p=0,2720), no entanto, nÃo contribuÃram de forma signifi cativa para a experiÃncia de
cÃrie. Quando comparadas a GN, crianÃas GI (p=0,0042) e GIII (p=0,0372) apresentaran maior
risco à cÃrie. NÃo houve alteraÃÃo do PPS das crianÃas dos grupos GN, GI e GII. O grupo GIII
nÃo expressou uma banda protÃica (123,56+4,35 kDa) na presenÃa da doenÃa cÃrie. CPT nÃo se
associou à experiÃncia de cÃrie (p=0,5651), severidade da doenÃa (p=0,6015) ou contaminaÃÃo
por EGM (p=0,2162). Os resultados deste estudo sugerem que o estado nutricional aumenta o
risco à cÃrie em crianÃas desnutridas leve e grave, havendo um perfi l protÃico diferenciado em
crianÃas gravemente desnutridas com experiÃncia de cÃrie. / The aim of the present study was to compare caries experience (dmfs), severity
of early childhood caries (S-ECC), salivary mutans streptococci (MS) levels, total protein
concentration (TPC) and salivary protein profi le (SPP) between nourished and malnourished
children. One hundred and twenty 12-70 month-old malnourished children, with and without
ECC were separated into being mildly (GI, n=31), moderately (GII, n=59) or severely (GIII,
n=31) malnourished, according to WHO standards. Forty-seven nourished children (GN) were
used as controls. Unstimulated whole saliva was collected from all participants, subsequently
centrifuged. Supernatants were lyophilized and stored at -20o C for posterior TPC analysis
by the Bradford method. Salivary protein profi le was obtained by electrophoresis in SDSpoliacrilamide
gel through the Laemmli method. Stimulated whole saliva was collected and
used for MS detection in MSB agar medium. MS concentration in saliva was reported in cfu/
mL. Dental examination was performed and dmfs scores and S-ECC were calculated. Age
(p=0,0000), MS counts (p=0,0321) and nutritional status (p=0,0316) demonstrated positive
contribution for the development of dental caries. However, gender (p=0,7094) and TPC (0,2720)
did not signifi cantly contribute with caries experience. When compared to GN, children in GI
(p=0,0042) and GIII (p=0,0372) presented higher risk of experiencing dental caries. In addition,
no differences in SPP were observed between these groups. GIII children did not express one
protein band (123,56+4,35 kDa) in the presence of dental caries. TPC was not associated with
caries experience (p=0,5651), severity of ECC (p=0,6015) or MS counts (p=0,2162). Our results
suggest that nutritional status increases caries risk in mildly and severely malnourished children,
and salivary protein profi le differs among severely malnourished children with dental caries.
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