Debbie Willis
Society for Endocrinology
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Featured researches published by Debbie Willis.
The Journal of Clinical Endocrinology and Metabolism | 2010
Wiebke Arlt; Debbie Willis; Sarah H. Wild; Nils Krone; Emma J. Doherty; Stefanie Hahner; Thang S. Han; Paul V. Carroll; G. S. Conway; D. Aled Rees; Roland H. Stimson; Brian R. Walker; John M. Connell; Richard Ross
Context: No consensus exists for management of adults with congenital adrenal hyperplasia (CAH) due to a paucity of data from cohorts of meaningful size. Objective: Our objective was to establish the health status of adults with CAH. Design and Setting: We conducted a prospective cross-sectional study of adults with CAH attending specialized endocrine centers across the United Kingdom. Patients: Participants included 203 CAH patients (199 with 21-hydroxylase deficiency): 138 women, 65 men, median age 34 (range 18–69) years. Main Outcome Measures: Anthropometric, metabolic, and subjective health status was evaluated. Anthropometric measurements were compared with Health Survey for England data, and psychometric data were compared with appropriate reference cohorts. Results: Glucocorticoid treatment consisted of hydrocortisone (26%), prednisolone (43%), dexamethasone (19%), or a combination (10%), with reverse circadian administration in 41% of patients. Control of androgens was highly variable with a normal serum androstenedione found in only 36% of patients, whereas 38% had suppressed levels suggesting glucocorticoid overtreatment. In comparison with Health Survey for England participants, CAH patients were significantly shorter and had a higher body mass index, and women with classic CAH had increased diastolic blood pressure. Metabolic abnormalities were common, including obesity (41%), hypercholesterolemia (46%), insulin resistance (29%), osteopenia (40%), and osteoporosis (7%). Subjective health status was significantly impaired and fertility compromised. Conclusions: Currently, a minority of adult United Kingdom CAH patients appear to be under endocrine specialist care. In the patients studied, glucocorticoid replacement was generally nonphysiological, and androgen levels were poorly controlled. This was associated with an adverse metabolic profile and impaired fertility and quality of life. Improvements in the clinical management of adults with CAH are required.
Clinical Endocrinology | 2011
S. Faisal Ahmed; John C. Achermann; Wiebke Arlt; Adam Balen; G. S. Conway; Zoe Edwards; Sue Elford; Ieuan A. Hughes; Louise Izatt; Nils Krone; Harriet Miles; Stuart J. O’Toole; Les Perry; Caroline Sanders; Margaret Simmonds; A. Michael Wallace; Andrew Watt; Debbie Willis
It is paramount that any child or adolescent with a suspected disorder of sex development (DSD) is assessed by an experienced clinician with adequate knowledge about the range of conditions associated with DSD. If there is any doubt, the case should be discussed with the regional team. In most cases, particularly in the case of the newborn, the paediatric endocrinologist within the regional DSD team acts as the first point of contact. The underlying pathophysiology of DSD and the strengths and weaknesses of the tests that can be performed should be discussed with the parents and affected young person and tests undertaken in a timely fashion. This clinician should be part of a multidisciplinary team experienced in management of DSD and should ensure that the affected person and parents are as fully informed as possible and have access to specialist psychological support. Finally, in the field of rare conditions, it is imperative that the clinician shares the experience with others through national and international clinical and research collaboration.
Clinical Endocrinology | 2016
S. Faisal Ahmed; John C. Achermann; Wiebke Arlt; Adam Balen; G. S. Conway; Zoe Edwards; Sue Elford; Ieuan A. Hughes; Louise Izatt; Nils Krone; Harriet Miles; Stuart O'Toole; Les Perry; Caroline Sanders; Margaret Simmonds; Andrew Watt; Debbie Willis
It is paramount that any child or adolescent with a suspected disorder of sex development (DSD) is assessed by an experienced clinician with adequate knowledge about the range of conditions associated with DSD. If there is any doubt, the case should be discussed with the regional DSD team. In most cases, particularly in the case of the newborn, the paediatric endocrinologist within the regional team acts commonly as the first point of contact. This clinician should be part of a multidisciplinary team experienced in management of DSD and should ensure that the affected person and parents have access to specialist psychological support and that their information needs are comprehensively addressed. The underlying pathophysiology of DSD and the strengths and weaknesses of the tests that can be performed should be discussed with the parents and affected young person and tests undertaken in a timely fashion. Finally, in the field of rare conditions, it is imperative that the clinician shares the experience with others through national and international clinical and research collaboration.
The Journal of Clinical Endocrinology and Metabolism | 2013
Nils Krone; Ian T. Rose; Debbie Willis; James Hodson; Sarah H. Wild; Emma J. Doherty; Stefanie Hahner; Silvia Parajes; Roland H. Stimson; Thang S. Han; Paul V. Carroll; G. S. Conway; Brian R. Walker; Fiona MacDonald; Richard Ross; Wiebke Arlt
CONTEXTnIn congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency, a strong genotype-phenotype correlation exists in childhood. However, similar data in adults are lacking.nnnOBJECTIVEnThe objective of the study was to test whether the severity of disease-causing CYP21A2 mutations influences the treatment and health status in adults with CAH.nnnRESEARCH DESIGN AND METHODSnWe analyzed the genotype in correlation with treatment and health status in 153 adults with CAH from the United Kingdom Congenital adrenal Hyperplasia Adult Study Executive cohort.nnnRESULTSnCYP21A2 mutations were distributed similarly to previously reported case series. In 7 patients a mutation was identified on only 1 allele. Novel mutations were detected on 1.7% of alleles (5 of 306). Rare mutations were found on 2.3% of alleles (7 of 306). For further analysis, patients were categorized into CYP21A2 mutation groups according to predicted residual enzyme function: null (n = 34), A (n = 42), B (n = 36), C (n = 34), and D (n = 7). Daily glucocorticoid dose was highest in group null and lowest in group C. Fludrocortisone was used more frequently in patients with more severe genotypes. Except for lower female height in group B, no statistically significant associations between genotype and clinical parameters were found. Androgens, blood pressure, lipids, blood glucose, and homeostasis model assessment of insulin resistance were not different between groups. Subjective health status was similarly impaired across groups.nnnCONCLUSIONSnIn adults with classic CAH and women with nonclassic CAH, there was a weak association between genotype and treatment, but health outcomes were not associated with genotype. The underrepresentation of males with nonclassic CAH may reflect that milder genotypes result in a milder condition that is neither diagnosed nor followed up in adulthood. Overall, our results suggest that the impaired health status of adults with CAH coming to medical attention is acquired rather than genetically determined and therefore could potentially be improved through modification of treatment.
Clinical Endocrinology | 2013
Thang S. Han; Roland H. Stimson; Dafydd Rees Rees; Nils Krone; Debbie Willis; G. S. Conway; Wiebke Arlt; Brian R. Walker; Richard Ross
Adults with congenital adrenal hyperplasia (CAH) are treated with a wide variety of glucocorticoid treatment regimens.
European Journal of Endocrinology | 2013
Thang S. Han; Nils Krone; Debbie Willis; Gerard S. Conway; Stefanie Hahner; D. Aled Rees; Roland H. Stimson; Brian R. Walker; Wiebke Arlt; Richard Ross
Context Quality of life (QoL) has been variously reported as normal or impaired in adults with congenital adrenal hyperplasia (CAH). To explore the reasons for this discrepancy we investigated the relationship between QoL, glucocorticoid treatment and other health outcomes in CAH adults. Methods Cross-sectional analysis of 151 adults with 21-hydroxylase deficiency aged 18–69 years in whom QoL (assessed using the Short Form Health Survey), glucocorticoid regimen, anthropometric and metabolic measures were recorded. Relationships were examined between QoL, type of glucocorticoid (hydrocortisone, prednisolone and dexamethasone) and dose of glucocorticoid expressed as prednisolone dose equivalent (PreDEq). QoL was expressed as z-scores calculated from matched controls (14u200a430 subjects from UK population). Principal components analysis (PCA) was undertaken to identify clusters of associated clinical and biochemical features and the principal component (PC) scores used in regression analysis as predictor of QoL. Results QoL scores were associated with type of glucocorticoid treatment for vitality (P=0.002) and mental health (P=0.011), with higher z-scores indicating better QoL in patients on hydrocortisone monotherapy (P<0.05). QoL did not relate to PreDEq or mutation severity. PCA identified three PCs (PC1, disease control; PC2, adiposity and insulin resistance and PC3, blood pressure and mutations) that explained 61% of the variance in observed variables. Stepwise multiple regression analysis demonstrated that PC2, reflecting adiposity and insulin resistance (waist circumference, serum triglycerides, homeostasis model assessment of insulin resistance and HDL-cholesterol), related to QoL scores, specifically impaired physical functioning, bodily pain, general health, Physical Component Summary Score (P<0.001) and vitality (P=0.002). Conclusions Increased adiposity, insulin resistance and use of prednisolone or dexamethasone are associated with impaired QoL in adults with CAH. Intervention trials are required to establish whether choice of glucocorticoid treatment and/or weight loss can improve QoL in CAH adults.
Clinical Endocrinology | 2013
Trevor Howlett; Debbie Willis; Gillian E. Walker; J. A. H. Wass; Peter J Trainer
We investigated the control of GH and IGF1 in acromegaly in routine clinical practice in the UK on and off medical treatment.
The Journal of Clinical Endocrinology and Metabolism | 2014
Thang S. Han; G. S. Conway; Debbie Willis; Nils Krone; Dafydd Aled Rees; Roland H. Stimson; Wiebke Arlt; Brian R. Walker; Richard Ross
CONTEXTnTreatment of congenital adrenal hyperplasia (CAH) in childhood focuses on growth and development and adult final height (FH) is a measure of effective treatment. We hypothesized that shorter adults will have more severe underlying disease and worse health outcomes.nnnMETHODSnThis was a cross-sectional analysis of 199 adults with CAH. FH and quality of life were expressed as z-scores adjusted for midparental target height or UK population height.nnnRESULTSnFH correlated inversely with age (men, r = -0.38; women, r = -0.26, P < .01). Men and women had z-scores adjusted for midparental target height of -2 and -1, respectively, and both groups had UK population height z-scores of -1 below the UK population (P < .01). In women, FH was shorter in non-salt-wasting than salt-wasting classic CAH (P < .05) and in moderately affected genotype group B women than either more severely affected groups null and A (P < .01) or the mildest group C (P < .001). Short stature and a higher prevalence of hypertension were observed in classic CAH patients diagnosed late (after 1 y) compared with those diagnosed early and in women treated with glucocorticoid only compared with those treated with both glucocorticoids and mineralocorticoids (P < .05). FH did not associate with insulin sensitivity, lipid profile, adiposity, or quality of life.nnnCONCLUSIONSnAdult CAH patients remain short, although height prognosis has improved over time. The shortest adults are those diagnosed late with moderate severity CAH and are at increased risk of adult hypertension; we hypothesize that these patients are exposed in childhood to high androgens and/or excessive glucocorticoids with potential programming of hypertension. Another possibility is inadequate mineralocorticoid treatment early in life in the late-diagnosed patient group. Prospective studies are now required to examine these hypotheses.
Hormone Research in Paediatrics | 2009
Nils Krone; Debbie Willis; Ian T. Rose; Charlene Crosby; Sarah H. Wild; Emma J. Doherty; Stefanie Hahner; Thang S. Han; Roland H. Stimson; Paul V. Carroll; Gerard S. Conway; Dafydd A. Rees; Brian R. Walker; Fiona MacDonald; Richard Ross; Wiebke Arlt; United Kingdom Congenital Adrenal
Multiple linear regression models are built to predict either the adult height or the age at first menstruation, for girls with an idiopathic central precocious puberty.
Archive | 2016
Thang S. Han; Nils Krone; Debbie Willis; Gerard S. Conway; Stefanie Hahner; D. Aled Rees; Roland H. Stimson; Brian R. Walker; Wiebke Arlt; Richard Ross