Results: 11

MSC-derived exosomes protect auditory hair cells from neomycin-induced damage via autophagy regulation

Biol. Res; 57 (), 2024
BACKGROUND: Sensorineural hearing loss (SNHL) poses a major threat to both physical and mental health; however, there is still a lack of effective drugs to treat the disease. Recently, novel biological therapies, such as mesenchymal stem cells (MSCs) and their products, namely, exosomes, are showing prom...

Estudo das emissões otoacústicas residuais nas perdas auditivas neurossensoriais com diferenciação de artefatos e respostas fisiológicas

Audiol., Commun. res; 27 (), 2022
RESUMO Objetivo avaliar o efeito da variação da intensidade de estimulação sobre as respostas das emissões otoacústicas produto de distorção em indivíduos com perda auditiva neurossensorial, utilizando um protocolo de gradiente de fase das emissões. Métodos estudo observacional transversal. ...

Cochlea cell-specific marker expression upon in vitro Hes1 knockdown

Braz. j. med. biol. res; 54 (7), 2021
NOTCH pathway proteins, including the transcriptional factor HES1, play crucial roles in the development of the inner ear by means of the lateral inhibition mechanism, in which supporting cells have their phenotype preserved while they are prevented from becoming hair cells. Genetic manipulation of this ...

Use of scanning electron microscopy in the cochlea of guinea pigs

Abstract Introduction: The use of electron microscopy in the study of the inner ear has allowed us to observe minute details of the hair cells, especially in ototoxicity studies; however, the preparation of this material is a difficult and delicate task. In an attempt to simplify the handling of these m...

The Effects of Riluzole on Cisplatin-induced Ototoxicity

Abstract Introduction Riluzole (2-amino-6-trifluoromethoxy benzothiazole) is known as a neuroprotective, antioxidant, antiapoptotic agent. It may have beneficial effects on neuronal cell death due to cisplatin-induced ototoxicity. Objective To evaluate the effect of riluzole on cisplatin-induced otot...

Stem-cell therapy for hearing loss: are we there yet?

Abstract Introduction: Mammalian hair cells and auditory neurons do not show regenerative capacity. Hence, damage to these cell types is permanent and leads to hearing loss. However, there is no treatment that re-establishes auditory function. Regenerative therapies using stem cells represent a promisin...

Evaluating the ototoxicity of an anti-MRSA peptide KR-12-a2

Abstract Introduction Methicillin-resistant staphylococcus aureus is an emerging problem for the treatment of chronic suppurative otitis media, and also for pediatric tympanostomy tube otorrhea. To date, there are no effective topical antibiotic drugs to treat methicillin-resistant staphylococcus aureus...

Emissões otoacústicas em recém-nascidos com hipóxia perinatal leve e moderada

CoDAS; 28 (2), 2016
RESUMO Introdução Atualmente, somente a hipóxia neonatal grave (evidenciada pelo valor do Apgar) é considerada risco para a deficiência auditiva. A hipóxia é uma das causas mais comuns de lesão e morte celular. Nos casos de hipóxia leve ou moderada, embora menor, a privação da oxigenação es...

Fisiología coclear

El interés por la fisiología y patología del sistema auditivo ha crecido en los últimos años, y no sin razón, en Estados Unidos grados variables de hipoacusia afectan al doble de la población afectada por ceguera. El sistema auditivo presenta algunas características fascinantes en su funcionamien...

Hairy cell leukemia: a histo-cytochemical and ultra-structural study

Säo Paulo med. j; 116 (2), 1998
We studied five patients with hairy cell leukemia (HCL) diagnosed within the last ten years at the Department of Hematology of Universidade Federal de Sao Paulo - Escola Paulista de Medicina. Our purpose was to analyze the value of transmission electron microscopy (TEM) by comparing this method with the ...