Autosomal dominant retinal vasculopathy with cerebral leukodystrophy is a microvascular endotheliopathy with middle-age onset. In nine families, we identified heterozygous C-terminal frameshift mutations in TREX1, which encodes a 3'-5' exonuclease. These truncated proteins retain exonuclease activity but lose normal perinuclear localization. These data have implications for the maintenance of vascular integrity in the degenerative cerebral microangiopathies leading to stroke and dementias.

We describe an extended Dutch family with a new hereditary disorder: autosomal dominant vascular retinopathy, migraine and Raynaud's phenomenon. Information was obtained on 289 family members (151 males, 138 females), of whom 198 were personally interviewed. Retinopathy was found in 20 (6.9%) of the family members, migraine in 65 (22.5%) and Raynaud's phenomenon in 50 (17.3%). A combination of all three symptoms was found in 11 subjects. In a genetic linkage analysis we firstly excluded several candidate loci. Subsequently, 75% of the autosomal genome was excluded in a genome-wide search. The following conclusions were drawn. First, genetic factors are involved in Raynaud's phenomenon. Secondly, the genetic linkage of migraine with vascular retinopathy and Raynaud's phenomenon supports a vascular aetiology of this disorder. Finding the gene for this family may help to elucidate the genetic background of migraine and of vascular disorders in general.

We describe a new syndrome with autosomal dominant transmission whose most striking feature is vascular retinopathy. The retinopathy is often associated with migraine, Raynaud's phenomenon and mental changes, mainly forgetfulness, aggression and depression. To define this syndrome we collected medical data on 110 family members. General ophthalmological examination and fluorescein angiography were performed in 61 persons. The retinopathy, as diagnosed in 22 persons, is characterized by central and peripheral microangiopathy, areas of capillary non-perfusion, haemorrhages, cotton wool spots and, in a more advanced stage, occlusion of large retinal vessels, which can induce a neovascular response. A vascular occlusive disorder may be the common aetiological factor of the various manifestation of this syndrome.

We describe a new hereditary syndrome with an autosomal dominant mode of inheritance, with vascular retinopathy, migraine and Raynaud's phenomenon as the most striking features. The retinopathy is characterized by tortuosity and variable caliber of the retinal vessels, haemorrhages, telangiectases and both central and peripheral vascular occlusions, leading finally to a proliferative retinopathy.

Aim/background-In a new autosomal dominant syndrome (which the authors called hereditary vascular retinopathy (HVR)) cerebral ischaemia, Raynaud's phenomenon, and migraine are the most striking features. As serotonin (5-HT) is known to play a role in vasospastic processes, Raynaud's phenomenon, and migraine they wondered whether the serotoninergic status in patients with HVR is diVerent. Therefore, it was decided to investigate some serotoninergic variables in these patients. Methods-The study was conducted in 12 patients with HVR, 10 relatives, and 19 healthy controls. The levels of intraplatelet and plasma 5-HT were measured, as well as the plasma levels of its precursor amino acid tryptophan and the ratio of tryptophan to the large neutral amino acids, which compete with the transport of tryptophan through the blood-brain barrier. Results-In both the patients with HVR and in nine relatives the concentrations of 5-HT in plasma and platelets were significantly lower than in controls. The plasma levels of tryptophan and the tryptophan ratio were also found to be lower in the patient group compared with the control group, but not in the relatives. Conclusion-The observed alterations in 5-HT and its precursor tryptophan strongly suggest the existence of a malfunctioning of the serotoninergic system in the HVR syndrome. (Br J Ophthalmol 1998;82:897-900)