CASE REPORT

Lysyl oxidase deficiency: a new cause of human arterial dissection

I Sibon^1,*, P Sommer², J M Daniel Lamaziere^3,* and J Bonnet^1,*

¹ CHU Bordeaux, Bordeaux, France
² IBCP Lyon, Lyon, France
³ INSERM U441 "Athérosclérose", Pessac, France

Correspondence to:
Correspondence to:
Dr Igor Sibon
Hopital Pellegrin, Place Amélie Raba-Léon, 33076 Bordeaux cedex, France; igor.sibon{at}chu-bordeaux.fr

Spontaneous coronary artery dissection is a rare cause of myocardial ischaemia. The underlying mechanism is unknown but some dissections are associated with extracellular matrix disorganisation of genetic origin. A deficiency in extracellular matrix protein cross links has rarely been studied. A single clinical case of spontaneous coronary artery dissection is reported. Lysyl oxidase (LOX) and extracellular matrix organisation were investigated by skin immunohistology and polymerase chain reaction of LOX expression. Both approaches found a dramatic LOX decrease. LOX deficiency has a major role in human arterial wall organisation during development. The suspected mechanism is an elastin or collagen polymer cross linking deficiency.

Abbreviations: ECM, extracellular matrix; LOX, lysyl oxidase; PCR, polymerase chain reaction

Keywords: lysyl oxidase; dissection; vascular wall; cross links

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