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T P Parikh, B Stolze, Y Ozarda, J Jonklaas, K Welsh, L Masika, M Hill, A DeCherney and S J Soldin

Introduction Diurnal variations in the serum concentration of steroid hormones and their metabolism, as assessed by urinary excretion, have long been known for cortisol and testosterone ( 1 , 2 , 3 ). Less information exists for the other up

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Louise Færch, Anders Juul, Ulrik Pedersen-Bjergaard and Birger Thorsteinsson

, normal GH secretion is important to avoid progression of hypoglycemic episodes into severe hypoglycemia. GH is reflected by insulin-like growth factor 1 (IGF1), which is used to evaluate the GH axis, because GH has great diurnal variation. Total IGF1 has

Open access

Julie Smith, Jan Fahrenkrug, Henrik L Jørgensen, Christina Christoffersen and Jens P Goetze

errors in the RNA extraction phase. Light/darkness cycle (diurnal variations) To test for diurnal variations, the mRNA contents of the known clock genes Per1 and Bmal1 were measured in peri-renal white adipose tissue from the murine ZT groups. The

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Andrew R Dismukes, Vanessa J Meyer, Elizabeth A Shirtcliff, Katherine P Theall, Kyle C Esteves and Stacy S Drury

present investigation: DHEA and TL To best characterize the relationship between TL and DHEA levels, the present investigation examined the association between TL and acute reactivity, diurnal variation and waking levels of DHEA. This characterization of

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Ferdinand Roelfsema, Diana van Heemst, Ali Iranmanesh, Paul Takahashi, Rebecca Yang and Johannes D Veldhuis

-invariant statistical estimate of relative randomness in the data, wherein larger values denote greater process randomness and less feedback control ( 25 , 26 ). Diurnal variations Diurnal variations of cortisol levels were studied in two ways: first, by

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Merete Gedde-Dahl, Espen Thiis-Evensen, Andreas Myklebust Tjølsen, Kjerstin Skrede Mordal, Morten Vatn and Deidi S Bergestuen

sampling would be less time-consuming and reduce the risk of sampling errors. This procedure would, however, be susceptible to a diurnal variation in U5-HIAA secretion. Daily variation in U5-HIAA secretion was investigated by Zuetenhorst et al . They

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Bjørn O Åsvold, Valdemar Grill, Ketil Thorstensen and Marit R Bjørgaas

, or diurnal variation in plasma cortisol; n =9), or after an endocrinological evaluation without additional tests for Cushing's syndrome ( n =2). Among subjects with normal DST (defined as posttest plasma cortisol <100 nmol/l), 12 had posttest

Open access

Shuhui Ma, Zixu Wang, Jing Cao, Yulan Dong and Yaoxing Chen

and overexpression in pinealocytes under green light. The figure is marked the same as Fig. 3. The mRNA expression of all positive clock genes in pinealocytes showed a significant diurnal variation after BMAL1 and CLOCK overexpression ( P

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Carina Ankarberg-Lindgren, Aneta Gawlik, Berit Kriström, Laura Mazzanti, Elisabeth J Ruijgrok and Theo C J Sas

cut even smaller pieces ( 11 ). We favor physiologically administered estrogen replacement therapy, in other words, mimicking the diurnal variation of E 2 seen in early puberty by nocturnal application of a cut piece (approximately 3 µg) of an E 2

Open access

Hershel Raff and Hariprasad Trivedi

52 – 55 . ( doi:10.1053/ajkd.1998.v32.pm9669424 ). 26 Cooke CR Whelton PK Moore MA Caputo RA Bledsoe T Walker WG . Dissociation of the diurnal variation of aldosterone and cortisol in