Research Topics
Genomes and Genes | Johan SvartbergSummaryAffiliation: University Hospital of North Norway Country: Norway Publications
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Publications
[Hyperprolactinemia and prolactinemia--investigation and treatment]Johan Svartberg
Endokrinologisk seksjon Medisinsk avdeling Universitetssykehuset i Nord Norge 9038 Tromsø
Tidsskr Nor Laegeforen 122:494-8. 2002..In cases of macroprolactinomas, symptoms caused by local mass effects can be seen. A variety of other conditions may also cause hyperprolactinaemia; the goal of the examination is to identify the cause...
Reduced pulmonary function is associated with lower levels of endogenous total and free testosterone. The Tromsø studyJohan Svartberg
Department of Medicine, University Hospital of North Norway, 9038 Tromsø, Norway
Eur J Epidemiol 22:107-12. 2007..We suggest that the reduction of total and free testosterone could be due to an alteration of the hypothalamic-pituitary response...
Endogenous testosterone levels and smoking in men. The fifth Tromsø studyJohan Svartberg
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Int J Androl 30:137-43. 2007..Thus, smoking seems to be an important confounding factor when evaluating testosterone levels, and could possibly mask borderline hypogonadism...
Epidemiology: testosterone and the metabolic syndromeJ Svartberg
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Int J Impot Res 19:124-8. 2007..Thus, testosterone may have a protective role in the development of metabolic syndrome and subsequent diabetes mellitus and cardiovascular disease in aging men. However, clinical trials are needed to confirm this assumption...
Low testosterone levels are associated with carotid atherosclerosis in menJ Svartberg
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
J Intern Med 259:576-82. 2006..To study the relationship between endogenous sex hormone levels and intima-media thickness (IMT) of the carotid artery measured by ultrasonography...
Testosterone treatment in elderly men with subnormal testosterone levels improves body composition and BMD in the hipJ Svartberg
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Int J Impot Res 20:378-87. 2008..Older men with subnormal testosterone levels had an unfavorable metabolic profile. Testosterone treatment improved body composition, but it did not reverse the unfavorable metabolic profile...
Endogenous sex hormone levels in men are not associated with risk of venous thromboembolism: the Tromso studyJohan Svartberg
Section of Endocrinology, Department of Medicine, University Hospital of North Norway, 9038 Tromsø, Norway
Eur J Endocrinol 160:833-8. 2009..As arterial CVDs and venous thromboembolism (VTE) have been shown to share common risk factors, the purpose of the present study was to determine the impact of endogenous sex hormone levels on the incidence of VTE in a cohort of men...
Vasomotor symptoms and mortality: the Rancho Bernardo StudyJohan Svartberg
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Menopause 16:888-91. 2009..The purpose of this study was to examine the associations of vasomotor symptoms with risk of all-cause, cardiovascular disease (CVD), and coronary heart disease (CHD) mortality in community-dwelling older women, with a mean age of 69 years...
[Should older men be treated with testosterone?]Johan Svartberg
Endokrinologisk seksjon, Medisinsk avdeling B, Universitetssykehuset Nord Norge, 9038 Tromsø
Tidsskr Nor Laegeforen 125:879-82. 2005..Despite this uncertainty the sale of testosterone have increased enormously over the last few years, hence it seems important to discuss what we now know about such treatment...
Measuring gonadotropins is of limited value in detecting hypogonadism in ageing men: the Tromsø studyJohan Svartberg
Section of Endocrinology, Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Int J Androl 30:445-51. 2007..001). In the longitudinal study, however, LH levels did not predict changes in total and free testosterone levels. Thus, in clinical practice, measuring gonadotropins seems to be of limited value in detecting hypogonadism in ageing men...
Seasonal variation of testosterone and waist to hip ratio in men: the Tromsø studyJohan Svartberg
Department of Medicine, University Hospital of North Norway, N 9038 Tromsø
J Clin Endocrinol Metab 88:3099-104. 2003..The variations in hormone levels were large, with a 31% difference between the lowest and highest monthly mean level of free testosterone. Prospective studies are needed to establish the direction of the association and its etiology...
Waist circumference and testosterone levels in community dwelling men. The Tromsø studyJohan Svartberg
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Eur J Epidemiol 19:657-63. 2004....
Testosterone treatment improves body composition and sexual function in men with COPD, in a 6-month randomized controlled trialJ Svartberg
Department of Medicine, University Hospital of North Norway, N 9038 Tromsø, Norway
Respir Med 98:906-13. 2004..Furthermore, there were no clinical or biochemical side effects...
Androgens and chronic obstructive pulmonary diseaseJohan Svartberg
Division of Internal Medicine, University Hospital of North Norway, University of Tromsø, Tromsø, Norway
Curr Opin Endocrinol Diabetes Obes 17:257-61. 2010..To evaluate the recent literature on the effect of the use of androgens in men with chronic obstructive pulmonary disease (COPD)...
The associations of age, lifestyle factors and chronic disease with testosterone in men: the Tromsø StudyJohan Svartberg
Department of Medicine, University Hospital of North Norway, N 9038, Tromsø, Norway
Eur J Endocrinol 149:145-52. 2003....
Association of endogenous testosterone with blood pressure and left ventricular mass in men. The Tromsø StudyJohan Svartberg
Department of Medicine, University Hospital of North Norway, 9038 Tromsø, Norway
Eur J Endocrinol 150:65-71. 2004..To test the hypothesis that lower endogenous testosterone levels are associated with higher blood pressure, left ventricular mass, and left ventricular hypertrophy...
Change in cardiovascular risk factors in relation to diabetes status: the Tromso StudyJosepha Joseph
Department of Community Medicine, University of Tromsø, Tromsø, Norway
Eur J Prev Cardiol 19:551-7. 2012..To investigate changes in cardiovascular risk factors over 14 years in relation to diabetes status...
Low testosterone and sex hormone-binding globulin levels and high estradiol levels are independent predictors of type 2 diabetes in menTorkel Vikan
Division of Internal Medicine, Department of Cardiology, University Hospital of North Norway, Tromsø 9038, Norway
Eur J Endocrinol 162:747-54. 2010..To study the impact of endogenous sex hormone levels in community-dwelling men on later risk for type 2 diabetes...
Low serum testosterone in men is inversely associated with non-fasting serum triglycerides: the Tromsø studyIngvild Agledahl
Department of Medicine, University Hospital of North Norway, 9038 Tromsø, Norway
Nutr Metab Cardiovasc Dis 18:256-62. 2008..To study the relationships between endogenous testosterone, sex hormone-binding globulin (SHBG) and serum lipids in non-fasting men...
Impact of long-term testosterone treatment on plasma levels of free TFPI and TF-induced thrombin generation ex vivo in elderly men with low testosterone levelsIngvild Agledahl
Department of Medicine, Institute of Clinical Medicine, University of Tromsø, 9037 Tromsø, Norway
Thromb Haemost 102:945-50. 2009..The potential antithrombotic role of testosterone therapy remains to be elucidated...
Androgen receptor gene polymorphism and the metabolic syndrome in 60-80 years old Norwegian menPaal André Skjaerpe
Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway
Int J Androl 33:500-6. 2010..013) than those with only one component. In conclusion, there were no associations with GGN repeat length, while short CAG repeat length seems to be associated with increased risk of MS...
Clinical, immunological, and genetic features of autoimmune primary adrenal insufficiency: observations from a Norwegian registryMartina M Erichsen
Department of Medicine, Haukeland University Hospital, N 5021 Bergen, Norway
J Clin Endocrinol Metab 94:4882-90. 2009..We aimed to determine the clinical, immunological, and genetic features of a national registry-based cohort...
Risk factors for type 2 diabetes in groups stratified according to metabolic syndrome: a 10-year follow-up of the Tromsø StudyJosepha Joseph
Department of Community Medicine, University of Tromsø, 9037 Tromsø, Norway
Eur J Epidemiol 26:117-24. 2011..2 to 87.1% (P value < 0.0001). One half of the incident cases of type 2 diabetes were missed by using high metabolic score for risk prediction...
Incidence of and risk factors for type-2 diabetes in a general population: the Tromsø StudyJosepha Joseph
Department of Community Medicine, University of Tromsø, Tromsø, Norway
Scand J Public Health 38:768-75. 2010..08-0.31%) for the lowest risk group.Conclusions: A family history of diabetes, elevated BMI, and high triglyceride levels identifies independent of cardiovascular risk factors, a group with especially high risk of T2DM. [corrected]..
Endogenous sex hormones in relation to age, sex, lifestyle factors, and chronic diseases in a general population: the Tromsø StudyAshild Bjørnerem
Institute of Community Medicine, University of Tromsø, N 9037 Tromsø, Norway
J Clin Endocrinol Metab 89:6039-47. 2004..001). Men with chronic diseases had lower levels of DHEAS, compared with healthy men (P < 0.001). Smokers had higher DHEAS levels than nonsmokers. Further studies are needed to confirm these hormonal changes with age and disease...
Postprandial triglyceride metabolism in elderly men with subnormal testosterone levelsIngvild Agledahl
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Asian J Androl 10:542-9. 2008..To investigate the level of postprandial triglycerides (TG)s in elderly men with subnormal testosterone level (< or = 11.0 nmol/L) compared to men with normal testosterone level (> 11.0 nmol/L)...
Testosterone levels and psychological health status in men from a general population: the Tromsø studyLinnea Hergot Berglund
Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway
Aging Male 14:37-41. 2011..To investigate the association between endogenous testosterone levels and psychological health symptoms in men from a general population...
Androgen receptor gene polymorphism and sex hormones in elderly men: the Tromsø studyPaal André Skjaerpe
Institute of Clinical Medicine, University of Tromsø, Tromsø 9037, Norway
Asian J Androl 11:222-8. 2009..These findings indicate that when clinically evaluating T and LH levels in elderly men, the CAG and GGN repeat lengths do not need to be taken into consideration...
Polymorphisms related to the serum 25-hydroxyvitamin D level and risk of myocardial infarction, diabetes, cancer and mortality. The Tromsø StudyRolf Jorde
Tromsø Endocrine Research Group, Department of Clinical Medicine, University of Tromsø, and Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
PLoS ONE 7:e37295. 2012..Recently several single nucleotide polymorphisms (SNPs) associated with serum 25-hydroxyvitamin D (25(OH)D) level have been identified. If these relations are causal one would expect a similar association between these SNPs and health...
Impact of testosterone treatment on postprandial triglyceride metabolism in elderly men with subnormal testosterone levelsIngvild Agledahl
Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Scand J Clin Lab Invest 68:641-8. 2008..To investigate the impact of testosterone supplementation on postprandial triglycerides in elderly men with subnormal endogenous testosterone...
Endogenous sex hormones and the prospective association with cardiovascular disease and mortality in men: the Tromsø StudyTorkel Vikan
Division of Internal Medicine, University Hospital of North Norway, Tromsø 9038, Norway
Eur J Endocrinol 161:435-42. 2009..To study the impact of endogenous testosterone levels in community-dwelling men on later risk for myocardial infarction (MI) and all-cause, cardiovascular disease (CVD), and ischemic heart disease (IHD) mortality...
Serum parathyroid hormone as a predictor of increase in systolic blood pressure in menRolf Jorde
Institute of Clinical Medicine, University of Tromsø, University Hospital of North Norway, 9038 Tromsø, Norway
J Hypertens 23:1639-44. 2005..In cross-sectional studies there appears to be a link between calcium metabolism and blood pressure, and most studies have found a positive association between serum parathyroid hormone (PTH) and hypertension...
Effects of Age and Sex on Estimated Diabetes Prevalence Using Different Diagnostic Criteria: The Tromsø OGTT StudyMoira Strand Hutchinson
Tromsø Endocrine Research Group, Department of Clinical Medicine, University of Tromsø, 9037 Tromsø, Norway Division of Internal Medicine, University Hospital of North Norway, 9038 Tromsø, Norway
Int J Endocrinol 2013:613475. 2013..Among a substantial proportion of elderly subjects, and especially elderly women, the 2-hour plasma glucose was the only abnormal value...
Testosterone, hemostasis, and cardiovascular diseases in menEllen Brodin
Hematological Research Group HERG, Department of Clinical Medicine, University of Tromsø, Tromsø, Norway
Semin Thromb Hemost 37:87-94. 2011..The present review focuses on the coagulation system and CVD from the perspective of testosterone...
Associations between polymorphisms related to calcium metabolism and human height: the Tromsø StudyRolf Jorde
Tromsø Endocrine Research Group, Department of Clinical Medicine, University of Tromsø, Norway
Ann Hum Genet 76:200-10. 2012..In conclusion, several SNPs related to calcium metabolism are associated with height, in particular rs3829251 at the DHCR7/NADSYN1 gene...
Plasma free tissue factor pathway inhibitor (TFPI) levels and TF-induced thrombin generation ex vivo in men with low testosterone levelsIngvild Agledahl
Center for Atherothrombotic Research in Tromsø CART, Department of Medicine, Institute of Clinical Medicine, University of Tromsø, 9037 Tromsø, Norway
Thromb Haemost 101:471-7. 2009..Our findings suggest that low testosterone levels in elderly men is associated with low plasma free TFPI Ag and subsequent shortened initiation phase of TF-induced coagulation...
Normal overall mortality rate in Addison's disease, but young patients are at risk of premature deathMartina M Erichsen
Section for Endocrinology, Department of Medicine, Haukeland University Hospital, N 5021 Bergen, Norway
Eur J Endocrinol 160:233-7. 2009..Primary adrenal insufficiency (Addison's disease) is a rare autoimmune disease. Until recently, life expectancy in Addison's disease patients was considered normal...
Endogenous testosterone and the prospective association with carotid atherosclerosis in men: the Tromsø studyT Vikan
Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway
Eur J Epidemiol 24:289-95. 2009..The lack of prospective associations in our study may be due to increased use of anti-hypertensive and lipid-lowering drugs from 1994 baseline to follow-up...
The relationship between blood pressure and serum parathyroid hormone with special reference to urinary calcium excretion: the Tromsø studyF Saleh
Department of Internal Medicine B, University Hospital of North Norway, 9038 Tromsø, Norway
J Endocrinol Invest 29:214-20. 2006..In conclusion, blood pressure and serum PTH are associated. This association cannot be explained by the urinary calcium excretion alone...
The associations of endogenous testosterone and sex hormone-binding globulin with glycosylated hemoglobin levels, in community dwelling men. The Tromsø StudyJ Svartberg
Department of Medicine, University Hospital of North Norway, N-9038 Troms, Norway
Diabetes Metab 30:29-34. 2004..001 and p<0.01, respectively).CONCLUSION: Lower levels of total testosterone and SHBG were associated with increased HbA1c levels and diabetes independent of concomitant variations in obesity and body fat distribution...
Effects of vitamin D supplementation on symptoms of depression in overweight and obese subjects: randomized double blind trialR Jorde
Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway
J Intern Med 264:599-609. 2008....
Plasma profile of microRNA after supplementation with high doses of vitamin D3 for 12 monthsRolf Jorde
Tromsø Endocrine Research Group, Department of Clinical Medicine, University of Tromsø, Tromsø, Norway
BMC Res Notes 5:245. 2012..000-40.000 IU per week) and 37 subjects given placebo...
Neuropsychological function in relation to serum parathyroid hormone and serum 25-hydroxyvitamin D levels. The Tromsø studyRolf Jorde
Department of Internal Medicine, Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway
J Neurol 253:464-70. 2006..In conclusion, a deranged calcium metabolism appears to be associated with impaired function in several tests of neuropsychological function...
Could seasonal variation in testosterone levels in men be related to sleep?J Svartberg
Section of Endocrinology, Department of Medicine, University Hospital of North Norway, Tromsø, Norway
Aging Male 7:205-10. 2004..One possible explanation, besides the difference in climate, for the diverging findings between our previous study and the present study is different sleep patterns...
Components of the metabolic syndrome in long-term survivors of testicular cancerH S Haugnes
Department of Oncology, Institute of Clinical Medicine, University of Tromsø, Norway
Ann Oncol 18:241-8. 2007..A possible explanation of the excess cardiovascular risk in testicular cancer (TC) survivors is development of metabolic syndrome. The association between metabolic syndrome and TC treatment is examined in long-term survivors...
Surviving extreme hypercalcaemia--a case report and review of the literatureK Marienhagen
Department of Medicine, University Hospital of North Norway, Tromso, Norway
J Intern Med 258:86-9. 2005..Successful parathyroidectomy quickly relieves symptoms and prevents recurrence...
[Hormonally inactive pituitary adenomas]Morten Lund-Johansen
Nevrokirurgisk avdeling, Haukeland Universitetssykehus, Bergen
Tidsskr Nor Laegeforen 123:2253-6. 2003..Fractionated single beam irradiation or stereotactic radiosurgery is indicated in cases where there is a residual of growing tumours that may not be removed surgically...
Radiotherapy for rectal cancer is associated with reduced serum testosterone and increased FSH and LHKjersti Bruheim
The Cancer Center, Ullevaal University Hospital, Oslo, Norway
Int J Radiat Oncol Biol Phys 70:722-7. 2008..The aim of this study was to determine whether radiotherapy for rectal cancer affects testosterone production...
[Primary adrenal failure--causes, diagnostics and therapy]Kristian Løvås
Institutt for indremedisin, Universitetet i Bergen, Medisinsk avdeling Haukeland Universitetssykehus
Tidsskr Nor Laegeforen 125:155-8. 2005..2 mg in one dose per day. Treatment with 20 - 50 mg dehydroepiandrosterone has been studied in adrenal failure, but the evidence for positive effects is weak, and it can not be recommended as standard treatment in primary adrenal failure...
[Endogenous Cushing's syndrome]Johan Arild Evang
Endokrinologisk seksjon, Medisinsk avdeling, Rikshospitalet, 0027 Oslo
Tidsskr Nor Laegeforen 126:599-602. 2006..New diagnostic procedures make today's assessment more accurate. We describe which tests should be done when there is suspicion of the syndrome. Treatment options are mentioned...
Preoperative octreotide treatment in newly diagnosed acromegalic patients with macroadenomas increases cure short-term postoperative rates: a prospective, randomized trialSven M Carlsen
Department of Endocrinology, St Olavs Hospital, University Hospital of Trondheim, 7006 Trondheim, Norway
J Clin Endocrinol Metab 93:2984-90. 2008..Surgery is the primary treatment of acromegaly. However, it often fails to cure the patient. New strategies that improve surgical outcome are needed...
