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J Med Genet. 2016 Feb;53(2):113-22. doi: 10.1136/jmedgenet-2015-103392. Epub 2015 Nov 13.

Mutation in cytochrome b gene of mitochondrial DNA in a family with fibromyalgia is associated with NLRP3-inflammasome activation.

Author information

1
IBiS Institute of Biomedicine of Seville, University Hospital Virgen del Rocío-CSIC-University of Seville, Sevilla, Spain Research Laboratory, Oral Medicine Department, University of Sevilla, Sevilla, Spain.
2
Centro Andaluz de Biología del Desarrollo (CABD), Universidad Pablo de Olavide-CSIC-Junta de Andalucía, Sevilla, Spain Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Sevilla, Spain.
3
IBiS Institute of Biomedicine of Seville, University Hospital Virgen del Rocío-CSIC-University of Seville, Sevilla, Spain.
4
División de Neurociencias, Universidad Pablo de Olavide de Sevilla, Sevilla, Spain.
5
Centro Andaluz de Biología del Desarrollo (CABD), Universidad Pablo de Olavide-CSIC-Junta de Andalucía, Sevilla, Spain.
6
Escuela de Medicina Veterinaria y Zootecnia, Facultad de Ciencias de la Salud, Universidad de Las Américas, Quito, Ecuador.
7
Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica, Università Politecnica delle Marche, Ancona, Italy.
8
Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia.
9
Unidad de Reproducción Humana y Cirugía Endoscópica, Instituto para el Estudio de la Biología de la Reproducción Humana (INEBIR), Sevilla, Spain.

Abstract

BACKGROUND:

Fibromyalgia (FM) is a worldwide diffuse musculoskeletal chronic pain condition that affects up to 5% of the general population. Many symptoms associated with mitochondrial diseases are reported in patients with FM such as exercise intolerance, fatigue, myopathy and mitochondrial dysfunction. In this study, we report a mutation in cytochrome b gene of mitochondrial DNA (mtDNA) in a family with FM with inflammasome complex activation.

METHODS:

mtDNA from blood cells of five patients with FM were sequenced. We clinically and genetically characterised a patient with FM and family with a new mutation in mtCYB. Mitochondrial mutation phenotypes were determined in skin fibroblasts and transmitochondrial cybrids.

RESULTS:

After mtDNA sequence in patients with FM, we found a mitochondrial homoplasmic mutation m.15804T>C in the mtCYB gene in a patient and family, which was maternally transmitted. Mutation was observed in several tissues and skin fibroblasts showed a very significant mitochondrial dysfunction and oxidative stress. Increased NLRP3-inflammasome complex activation was observed in blood cells from patient and family.

CONCLUSIONS:

We propose further studies on mtDNA sequence analysis in patients with FM with evidences for maternal inheritance. The presence of similar symptoms in mitochondrial myopathies could unmask mitochondrial diseases among patients with FM. On the other hand, the inflammasome complex activation by mitochondrial dysfunction could be implicated in the pathophysiology of mitochondrial diseases.

KEYWORDS:

Immunology (including allergy); Muscle disease

PMID:
26566881
DOI:
10.1136/jmedgenet-2015-103392
[Indexed for MEDLINE]

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