Adrian D Stephens

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BACKGROUND AND OBJECTIVES We investigated outcomes in a UK neonatal cohort as a benchmark for care of children with sickle cell disease (SCD). DESIGN AND METHODS Two-hundred and fifty-two children (180 with hemoglobin [Hb] SS, 64 with HbSC, and 8 with HbS/beta thalassemia), identified during 1983-2005 by universal birth screening in East London, were(More)
Although DNA analysis is needed for characterization of the mutations that cause β-thalassaemia, measurement of the Hb A(2) is essential for the routine identification of people who are carriers of β-thalassaemia. The methods of quantitating Hb A(2) are described together with pitfalls in undertaking these laboratory tests with particular emphasis on(More)
Severe acute pain is the commonest manifestation of sickle cell disease (SCD) requiring hospital admission in Europe and the USA. Although the pain itself is not directly lifethreatening, inappropriate treatment leads to unnecessary suffering and potentially fatal complications, related both to the disease and the treatment, and repeated admissions with(More)
This study aims to determine the pregnancy outcomes in women attending the combined obstetric sickle cell clinic at King's College Hospital, London from June 2000 to July 2006. There were 71 pregnancies in 65 women with sickle cell disease. Sickle crisis requiring admission occurred in 47% of the antenatal patients. The first admission occurred most(More)
The precise identification of human hemoglobin variants, over 700 human hemoglobin variants are known, is essential for prediction of their clinical and genetic significance. A systematic approach to their rapid identification is described. Traditionally this requires protein or DNA characterization which entails lengthy analytical procedures. To overcome(More)
1. An intestinal perfusion technique has been used to study absorption in uivo of L-cystine and L-cysteine in six normal human subjects and three patients with homozygous cystinuria. 2. No significant absorption of L-cystine was detected during perfusion of the cystinuric patients, whereas L-cysteine absorption was normal. These results imply that L-cystine(More)
A prospective controlled study was undertaken to investigate the haemostatic and coagulation status of 18 adult subjects in the steady state of sickle cell anaemia (SCA), using a relatively new in vitro technique. Shear induced haemostasis, whole blood dynamic coagulation, and spontaneous thrombolysis were measured using nonanticoagulated blood. As(More)
Cystinuria is an inherited condition affecting the active transport of the diamino acids cystine, ornithine, lysine and arginine across the renal tubule and the small intestine. The only clinical effect is the production of urinary tract stones and if these can be prevented the affected individuals can lead a normal life. In many people cystine stones can(More)
Sickle cell disease (SCD) is characterised by intermittent episodes of acute severe pain, related to vaso-occlusion. Environmental factors are thought to play an important role, and studies in tropical countries have suggested that cold and rainy seasons are associated with increased episodes of acute pain. We have studied retrospectively the number of(More)