Functional connectivity response to acute pain assessed by fNIRS is associated with BDNF genotype in fibromyalgia : an exploratory study

• Autor(a) principal: Franco, Álvaro de Oliveira
• Data de Publicação: 2022
• Outros Autores: Venturini, Guilherme de Oliveira, Alves, Camila Fernanda da Silveira, Alves, Rael Lopes, Vicuña Serrano, Paul Cornelio, Ramalho, Leticia, Tomedi, Rafaela Brugnera, Bruck, Samara Machado, Torres, Iraci Lucena da Silva, Fregni, Felipe, Caumo, Wolnei
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/267227
• topic: Fibromialgia; Genótipo; Fator neurotrófico derivado do encéfalo; Dor

Fibromyalgia is a heterogenous primary pain syndrome whose severity has been associated with descending pain modulatory system (DPMS) function and functional connectivity (FC) between pain processing areas. The brain-derived neurotrophic factor (BDNF) Val66Met single nucleotide polymorphism has been linked to vulnerability to chronic pain. In this cross-sectional imaging genetics study, we investigated fbromyalgia, the relationship between BDNF Val66Met heterozygous genotypes (Val/Met), and the functional connectivity (FC) response pattern to acute pain stimulus in the motor (MC) and prefrontal (PFC) cortex assessed by near-infrared spectroscopy (fNIRS) before and after a cold pressor test utilizing water (0–1 °C). Also, we assessed the relationship between this genotype with the DPMS function and quality of life. We included 42 women (Val/ Val = 30; Val/Met = 12) with fbromyalgia, ages 18–65. The MANCOVA comparing Val/Met to Val/Val genotypes showed higher ΔFC between left(l)-PFC—l-MC (β= 0.357, p = 0.048), l-PFC—right(r)-PFC (β= 0.249, p = 0.012), l-PFC—r-MC (β= 0.226, p = 0.022), and l-MC—r-PFC (β= 0.260, p = 0.016). Val/Met genotypes showed higher efciency of the DPMS and lower disability due to pain. Here we show that fbromyalgia patients carrying the Val/Met BDNF genotype presented an increased ΔFC across MC and PFC in response to acute pain associated with diferences in acute pain perception and fbromyalgia symptoms.