OBJECTIVE: Insulin downregulates hepatic production of sex hormone-binding globulin (SHBG), which in turn influences sex hormone bioavailability. The effects of childhood-onset diabetes and insulin resistance in nondiabetic individuals on SHBG and testosterone in children and young adults are poorly understood. RESEARCH DESIGN AND METHODS: Individuals with diabetes diagnosed at <18 years of age (n = 48) and their siblings without diabetes (n = 47) were recruited for the Chicago Childhood Diabetes Registry Family Study. SHBG and total and free testosterone were measured. Participants ranged in age from 10 to 32 years; 39% were non-Hispanic white. The majority of individuals with diabetes had the classic type 1 phenotype (75%), while the remainder exhibited features of type 2 or mixed diabetes; 96% were treated with insulin. RESULTS: SHBG and total testosterone were higher in male subjects with diabetes compared with those in male siblings. Elevated SHBG was associated with the absence of endogenous insulin independent of sex; elevated total testosterone was similarly associated with the absence of C-peptide for male subjects only. Diabetes type and treatment were unrelated. In those without diabetes, greater insulin resistance had a small, nonsignificant association with lower SHBG and higher free testosterone. CONCLUSIONS: SHBG and total testosterone appear to be higher in male children and young adults with diabetes compared with nondiabetic male siblings, which is apparently related to the absence of endogenous insulin. This may have implications for sex hormone-dependent processes across the lifespan in male individuals diagnosed with diabetes as children.
OBJECTIVE:Insulin downregulates hepatic production of sex hormone-binding globulin (SHBG), which in turn influences sex hormone bioavailability. The effects of childhood-onset diabetes and insulin resistance in nondiabetic individuals on SHBG and testosterone in children and young adults are poorly understood. RESEARCH DESIGN AND METHODS: Individuals with diabetes diagnosed at <18 years of age (n = 48) and their siblings without diabetes (n = 47) were recruited for the Chicago Childhood Diabetes Registry Family Study. SHBG and total and free testosterone were measured. Participants ranged in age from 10 to 32 years; 39% were non-Hispanic white. The majority of individuals with diabetes had the classic type 1 phenotype (75%), while the remainder exhibited features of type 2 or mixed diabetes; 96% were treated with insulin. RESULTS:SHBG and total testosterone were higher in male subjects with diabetes compared with those in male siblings. Elevated SHBG was associated with the absence of endogenous insulin independent of sex; elevated total testosterone was similarly associated with the absence of C-peptide for male subjects only. Diabetes type and treatment were unrelated. In those without diabetes, greater insulin resistance had a small, nonsignificant association with lower SHBG and higher free testosterone. CONCLUSIONS:SHBG and total testosterone appear to be higher in male children and young adults with diabetes compared with nondiabetic male siblings, which is apparently related to the absence of endogenous insulin. This may have implications for sex hormone-dependent processes across the lifespan in male individuals diagnosed with diabetes as children.
Authors: P Preziosi; E Barrett-Connor; L Papoz; M Roger; M Saint-Paul; K Nahoul; D Simon Journal: J Clin Endocrinol Metab Date: 1993-02 Impact factor: 5.958
Authors: Federica Piani; Isabella Melena; Kalie L Tommerdahl; Natalie Nokoff; Robert G Nelson; Meda E Pavkov; Daniël H van Raalte; David Z Cherney; Richard J Johnson; Kristen J Nadeau; Petter Bjornstad Journal: J Diabetes Complications Date: 2020-12-31 Impact factor: 2.852
Authors: M Boering; P R van Dijk; S J J Logtenberg; K H Groenier; B H R Wolffenbuttel; R O B Gans; N Kleefstra; H J G Bilo Journal: Endocr Connect Date: 2016-05 Impact factor: 3.335