RESUMO
Parkinson's disease (PD) is a neurodegenerative disorder characterized by motor alterations, which is preceded by a prodromal stage where non-motor symptoms are observed. Over recent years, it has become evident that this disorder involves other organs that communicate with the brain like the gut. Importantly, the microbial community that lives in the gut plays a key role in this communication, the so-called microbiota-gut-brain axis. Alterations in this axis have been associated to several disorders including PD. Here we proposed that the gut microbiota is different in the presymptomatic stage of a Drosophila model for PD, the Pink1B9 mutant fly, as compared to that observed in control animals. Our results show this is the case: there is basal dysbiosis in mutant animals evidenced by substantial difference in the composition of midgut microbiota in 8-9 days old Pink1B9 mutant flies as compared with control animals. Further, we fed young adult control and mutant flies kanamycin and analyzed motor and non-motor behavioral parameters in these animals. Data show that kanamycin treatment induces the recovery of some of the non-motor parameters altered in the pre-motor stage of the PD fly model, while there is no substantial change in locomotor parameters recorded at this stage. On the other hand, our results show that feeding young animals the antibiotic, results in a long-lasting improvement of locomotion in control flies. Our data support that manipulations of gut microbiota in young animals could have beneficial effects on PD progression and age-dependent motor impairments. This article is part of the Special Issue on "Microbiome & the Brain: Mechanisms & Maladies".
Assuntos
Doença de Parkinson , Animais , Drosophila , Canamicina , Antibacterianos , Proteínas QuinasesRESUMO
INTRODUCTION: Gastric lavage is still used in Mexico and other countries without evidence to support this practice. We performed a randomized controlled trial to test the hypothesis that elimination of amniotic fluid from the stomach of the newborn reduces nausea and vomiting and improves tolerance on the first feedings of breast or formula milk. PATIENTS AND METHODS: A randomized, single-blind, controlled trial was conducted in a rural general hospital in the north of Mexico. Eligible healthy term newborns were randomly allocated to receive gastric lavage (n = 63) or observation (n = 61). The primary outcome measures were the presence of nausea and/or emesis in the first 24 hours of life and the breastfeeding failure rate, evaluated by a nurse blinded to the group assignment. RESULTS: Of the 63 patients in the gastric lavage group, 13 had at least one episode of nausea or vomiting compared with 15 out of 61 patients in the control group (relative risk: 0.84; 95 % CI: 0.43 to 1.61). Breastfeeding failure occurred in seven mother-child pairs in the gastric lavage group compared with five in the control group (P = 0.8; relative risk: 0.96; 95 % CI: 0.86 to 1.08). Other variables such as sex or cesarian section rate were unrelated to outcome. There were no complications that could be attributed to the procedure. All the newborn infants were discharged without problems. CONCLUSIONS: Gastric aspiration or lavage in the healthy full-term newborn is a common procedure that should be abandoned as it confers no advantages.