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Lasers Med Sci. 2017 May;32(4):749-756. doi: 10.1007/s10103-017-2156-3. Epub 2017 Mar 2.

Transcranial LED therapy on amyloid-β toxin 25-35 in the hippocampal region of rats.

Author information

1
Laboratory of Neuroanatomy and Neurophysiology for the Physiotherapy, Universidade Estadual do Centro-Oeste, Rua Simeão Camargo Varela de Sá, 03, Guarapuava, Paraná, Brazil, 85040-080.
2
School of Postural and Manual Therapy, Salgado Institute of Integral Health, Londrina, Paraná, Brazil, 86015-300.
3
Center for Innovation, Technology and Education (CITÉ), São José dos Campos, São Paulo, Brazil, 12245-650.
4
Laboratory of Neuroanatomy and Neurophysiology for the Physiotherapy, Universidade Estadual do Centro-Oeste, Rua Simeão Camargo Varela de Sá, 03, Guarapuava, Paraná, Brazil, 85040-080. ikerppers@gmail.com.
5
Laboratory of Biomedical Science for the Pharmacy, Universidade Estadual do Centro-Oeste, Guarapuava, Paraná, Brazil, 85040-080.

Abstract

Excessive Aβ deposition in the brain is associated with the formation of senile plaques, and their diffuse distribution is related to Alzheimer's disease. Thirty rats (EG) were irradiated with light-emitting diode (photobiomodulation (PBM)) in the frontal region of the skull after being inoculated with the Aβ toxin in the hippocampus; 30 rats were used as the control group (CG). The analysis was conducted at 7, 14, and 21 days after irradiation. We observed a decreased in Aβ deposits in treated animals compared with animals in the CG. The behavioral and motor assessment revealed that the EG group covered a larger ground distance and explored the open field than the CG group on days 14 and 21 (p < 0.05). The EG group was statistically significant in the spatial memory test compared to the CG group on day 14. The use of PBM significantly reduced the presence of Aβ plaques and improved spatial memory and behavioral and motor skills in treated animals on day 21.

KEYWORDS:

Amyloid beta; Amyloid-β protein; Hippocampus; LED; Rats; Senile plaque; Spatial memory; Transcranial light-emitting diode

PMID:
28255783
DOI:
10.1007/s10103-017-2156-3
[Indexed for MEDLINE]

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