Biomedical subjects

K J Gräf

Publications and source records attributed to K J Gräf.

At least 19 recordsLinked to original sources

PubMed2001

Secondary abscess formation in pituitary adenoma after tooth extraction. Case report.

The presence of an abscess in a pituitary tumor is a very rare finding. The authors report the case of a 69-year-old man with a pituitary adenoma confirmed by neuroimaging results, in whom a high fever, meningismus, and left-sided ophthalmoplegia developed 4 days after tooth extraction. The results of serial cranial magnetic resonance imaging were highly indicative of an abscess formation within the pituitary adenoma. During surgery the tumor was approached transsphenoidally and removed. Histological examination confirmed the presence of an abscess formation within the pituitary adenoma. It is most likely that the tooth extraction caused a bacteremia, which led to an inflammation with abscess formation within the pituitary adenoma. The authors conclude that invasive dental procedures should be avoided before planned resection of a pituitary adenoma.

Adenoma↗

PubMed2000

Plasma cortisol levels before and during "low-dose" hydrocortisone therapy and their relationship to hemodynamic improvement in patients with septic shock.

OBJECTIVES: To compare cortisol levels during "low-dose" hydrocortisone therapy to basal and ACTH-stimulated endogenous levels and to assess whether clinical course and the need for catecholamines depend on cortisol levels and/or pretreatment adrenocortical responsiveness. DESIGN AND SETTING: Prospective observational study in a medical ICU of a university hospital. PATIENTS: Twenty consecutive patients with septic shock and a cardiac index of 3.5 l/min or higher, started on "low-dose" hydrocortisone therapy (100 mg bolus, 10 mg/h for 7 days and subsequent tapering) within 72 h of the onset of shock. MEASUREMENTS AND RESULTS: Basal total and free plasma cortisol levels ranged from 203 to 2169 and from 17 to 372 nmol/l. In 11 patients cortisol production was considered "inadequate" because there was neither a response to ACTH of at least 200 nmol/l nor a baseline level of at least 1000 nmol/l. Following the initiation of hydrocortisone therapy total and free cortisol levels increased 4.2- and 8.5-fold to median levels of 3,587 (interquartile range 2,679-5,220) and 1,210 (interquartile range 750-1,846) nmol/l on day 1, and thereafter declined to median levels of 1,310 nmol/l and 345 nmol/l on day 7. Patients with "inadequate" steroid production could be weaned from vasopressor therapy significantly faster, although their plasma free cortisol concentrations during the hydrocortisone treatment period did not differ. CONCLUSIONS: (a) During proposed regimens of "low-dose" hydrocortisone therapy, initially achieved plasma cortisol concentrations considerably exceed basal and ACTH stimulated levels. (b) Cortisol concentrations decline subsequently, despite continuous application of a constant dose. (c) "Inadequate" endogenous steroid production appears to sensitize patients to the hemodynamic effects of a "therapeutic rise" in plasma cortisol levels.

Adrenocorticotropic Hormone↗

PubMed2000

Prognostic factors in patients with differentiated thyroid carcinoma.

OBJECTIVE: To study the prognostic factors in patients with differentiated thyroid carcinoma. DESIGN: Retrospective analysis. SETTING: University hospital, Germany. PATIENTS: 139 consecutive patients who underwent surgery for follicular (n = 42) and papillary thyroid carcinoma (n = 97). MAIN OUTCOME MEASURES: Survival rate, type of operation (systematic lymphadenectomy or no lymphadenectomy). RESULTS: Median observation time was 72 months (range 1-203). The 5 and 10 year survival rates in patients with papillary carcinoma were 92% and 89% respectively, and in those with follicular carcinoma 88% and 80%, respectively. Prognostic factors for papillary carcinoma were distant metastases, age, and extrathyroidal growth, and for follicular carcinoma they were distant metastases, extrathyroidal extension, and multifocal growth. The Union International contre le Cancer and European Organisation for Research and Treatment of Cancer scores and the age, grade, extent and size score were all highly significant. The extent of lymphadenectomy, primary or secondary thyroidectomy, and partial or total thyroidectomy did not influence survival. CONCLUSION: Staging and score systems may be helpful in calculating prognosis in differentiated thyroid carcinoma, but the benefit of systematic lymphadenectomy remains controversial.

Adenocarcinoma, Follicular↗

PubMed1998

Treatment of refractory depression with high-dose thyroxine.

In an open clinical trial we investigated whether addition of supraphysiological doses of thyroxine (T4) to conventional antidepressant drugs has an antidepressant effect in therapy-resistant depressed patients. Seventeen severely ill, therapy-resistant, euthyroid patients with major depression (12 bipolar, five unipolar) were studied. The patients had been depressed for a mean of 11.5 +/- 13.8 months, despite treatment with antidepressants and, in most cases, augmentation with lithium, carbamazepine, and neuroleptics. Thyroxine was added to their antidepressant medication, and the doses were increased to a mean of 482 +/- 72 micrograms/day. The patients' scores on the Hamilton rating Scale for Depression (HRSD) declined from 26.6 +/- 4.7 prior to the addition of T4 to 11.6 +/- 6.8 at the end of week 8. Eight patients fulfilled the criteria for full remission (a 50% reduction in HRSD score and a final score of < or = 9) within 8 weeks and two others fully remitted within 12 weeks. Seven patients did not remit. The 10 remitted patients were maintained on high-dose T4 and followed up for a mean of 27.2 +/- 22.0 months. Seven of these 10 remitted patients had an excellent outcome, two had milder and shorter episodes during T4 augmentation treatment, and one failed to profit from T4 treatment during the follow-up period. Side effects were surprisingly mild, and no complications were observed at all. In conclusion, augmentation of conventional antidepressants with high-dose T4 proved to have excellent antidepressant effects in approximately 50% of severely therapy-resistant depressed patients.

Aged↗

PubMed1998

3,3'-Diiodothyronine concentrations in the sera of patients with nonthyroidal illnesses and brain tumors and of healthy subjects during acute stress.

In this article we describe the development of a highly sensitive, accurate, and reproducible RIA for the measurement of 3,3'-diiodothyronine (3,3'-T2) in human serum and brain tissue. The detection limits were 1.8 fmol/g and 1.5 pmol/L in human brain tissue and serum, respectively. Serum concentrations of 3,3'-T2 were measured in 4 groups of patients with nonthyroidal illnesses (NTI), i.e. brain injuries (n = 15), sepsis (n = 24), liver disease (n = 22), and brain tumors (n = 23). The mean serum concentration of 3,3'-T2 in 62 healthy controls was 46.6 +/- 20.0 pmol/L. 3,3'-T2 levels declined significantly with increasing age. They were significantly lower in patients with brain injury (34.2 +/- 19.4 pmol/L; P = 0.006), were at the upper limit of normal in patients with sepsis (57.0 +/- 36.9 pmol/L; P = 0.06), and were elevated in patients with liver disease (72.6 +/- 56.7 pmol/L; P = 0.04) and brain tumors (89.0 +/- 40.9 pmol/L; P = 0.01). The serum levels of T3 were significantly lower than those in controls in all 4 patient groups. Serum concentrations of 3,3'-T2 were significantly enhanced in 9 patients with hyperthyroidism (85.4 +/- 43.0 pmol/L; P = 0.01) and were reduced in 12 patients with hypothyroidism (14.9 +/- 9.2 pmol/L; P = 0.001). In both normal brain tissue, obtained either intraoperatively or excised postmortem, and brain tumors, the concentrations of 3,3'-T2 ranged between 50-300 fmol/g. In healthy controls, 2 different forms of acute stress (sleep deprivation and delivering a lecture) significantly increased serum levels of T4 and T3, but did not affect those of 3,3'-T2 or 3,5-T2. In conclusion, our results show that, contrary to expectation, a low T3 syndrome in NTI is not always associated with low serum concentrations of 3,3'-T2. The production of 3,3'-T2 in NTI seems to be regulated in a disease-specific manner, resulting in unchanged, reduced, or elevated hormone concentrations.

Adolescent↗

PubMed1997

Influence of the dopamine D2 receptor (DRD2) genotype on neuroadaptive effects of alcohol and the clinical outcome of alcoholism.

The present study was performed to test the hypotheses that allelic variants at the human dopamine D2 receptor gene locus (DRD2) confer susceptibility to alcoholism or are associated with clinical subtypes of alcoholism. We investigated an A --> G substitution polymorphism in the 3'-untranslated region of exon 8 (E8) of DRD2 with allele frequencies of f(G) = 0.295 - 0.329. No significant association of the DRD2 genotype or allele frequencies with alcoholism was found in an association study including 283 alcoholics and 146 non-alcoholic controls. However, the frequent homozygous E8 A/A genotype with f(AA) = 0.47 - 0.48 was associated with increased anxiety and depression scores in alcoholics during the follow up after clinical detoxification treatment. In addition, E8 A/A was associated with increased suicide attempts and showed a tendency towards more severe withdrawal symptoms, early relapse and reduced responsiveness to the dopaminergic agonist apomorphine. Regression analysis revealed the DRD2 E8 genotype as the only significant factor determining withdrawal severity in female alcoholics. The findings suggest an influence of the DRD2 genotype on the neuropharmacological effects of chronic alcohol exposure and the clinical course of alcoholism.

Adaptation, Physiological↗

PubMed1997

Elevated 3,5-diiodothyronine concentrations in the sera of patients with nonthyroidal illnesses and brain tumors.

This study reports the development of a highly sensitive and reproducible RIA for the measurement of 3,5-diiodothyronine (3,5-T2) in human serum and tissue. The RIA employs 3-bromo-5-[125I]iodo-L-thyronine (3-Br-5-[125I]T1) as tracer, which was synthesized carrier free by an interhalogen exchange from 3,5-dibromo-L-thyronine (3,5-Br2T0). The detection limits were 1.0 fmol/g and 0.8 pmol/L in human brain tissue and serum, respectively. T3, diiodothyroacetic acid, and 3-monoiodothyronine cross-reacted with a 3,5-T2 antibody to the extent of 0.06%, 0.13%, and 0.65%, respectively. Serum concentrations of 3,5-T2 were measured in 62 healthy controls and 4 groups of patients with nonthyroidal illness, i.e. patients with sepsis (n = 24), liver diseases (n = 23), head and/or brain injury n = 15), and brain tumors (n = 21). The mean serum level of 3,5-T2 in the healthy subjects was 16.2 +/- 6.4 pmol/L. Concentrations of 3,5-T2 were significantly elevated in patients with sepsis (46.7 +/- 48.8 pmol/L; P < 0.01), liver diseases (24.8 +/- 14.9 pmol/L; P < 0.01), head and/or brain injury (24.1 +/- 11.3 pmol/L; P < 0.05), and brain tumors (21.6 +/- 4.8 pmol/L; P < 0.01). In all 4 patient groups, serum levels of T3 were significantly reduced, confirming the existence of a low T3 syndrome in these diseases. Serum concentrations of 3,5-T2 were significantly elevated in patients with hyperthyroidism (n = 9) and were reduced in patients with hypothyroidism (n = 8). The levels of T4, T3, and 3,5-T2 were measured in normal human tissue samples from the pituitary gland and various brain regions and in brain tumors. In normal brain tissue, the concentrations of 3,5-T2 ranged between 70-150 fmol/g, and the ratio of T3 to 3,5-T2 was approximately 20:1. In brain tumors, however, T3 levels were markedly lower, resulting in a ratio of T3 to 3,5-T2 of approximately 1:1. Recent findings suggest a physiological, thyromimetic role of 3,5-T2, possibly stimulating mitochondrial respiratory chain activity. Should this prove to be correct, then the increased availability of 3,5-T2 in nonthyroidal illness may be one factor involved in maintaining clinical euthyroidism in patients with reduced serum levels of T3 during nonthyroidal illness.

Astrocytoma↗

PubMed1996

Long-term observation of the hypothalamic-pituitary-thyroid (HPT) axis in alcohol-dependent patients.

Thyroid hormone levels and thyrotrophin (TSH) were measured in 45 alcohol-dependent patients before detoxification and 8 days, 3 months and 6 months after detoxification, and compared to levels in healthy controls. Before detoxification, levels of thyroxine (T4) and thyroxine-binding globulin (TBG) were significantly reduced in patients compared with healthy controls, while triiodothyronine (T3), reverse T3, and TSH levels did not differ from those in healthy controls. During the entire observation period, free T4 (fT4) and free T3 (fT3) levels were slightly elevated compared with those in healthy controls. T4 and TBG levels increased significantly during the first week of abstinence. Severity of withdrawal symptoms was negatively correlated with the total T4 levels after 8 days of abstinence. Three months after detoxification, relapsers displayed significantly lower T4 and TBG levels compared with abstinent patients. The increase in T3 levels was most pronounced between 8 days and 3 months of abstinence in both relapsing and abstinent patients. Six months after detoxification, only abstinent patients could be assessed, and they displayed increased TBG and T3 levels compared to healthy controls. Our findings suggest a different time-course for T3 and T4 levels after detoxification in alcohol-dependent patients, and indicate that T4 levels after detoxification interact with withdrawal symptoms.

Adult↗

PubMed1995

The hypothalamic-pituitary-thyroid axis in patients maintained on lithium prophylaxis for years: high triiodothyronine serum concentrations are correlated to the prophylactic efficacy.

Serum concentrations of thyrotropine (TSH), thyroxine (T4), free T4 (fT4), triiodothyronine (T3) and reverse T3 (rT3) were measured 4 x during a 12-month period in 28 patients with major depressive disorder maintained on lithium prophylaxis for 4-23 years (mean = 11.8). The course of illness was carefully monitored and documented for all patients throughout a 3.5-year period. All hormones were also measured in 41 healthy controls matched for age and gender. Patients on lithium had normal serum concentrations of TSH, T4, fT4 and T3 only the levels of rT3 were elevated. The efficacy of the lithium prophylaxis was significantly correlated to the serum concentrations of T3, i.e., the higher the patients' serum levels of T3, the shorter was the overall duration of recurrences of depression within the 3.5-year period. We conclude that: (1) thyrotropine and the thyroid hormones, which are often abnormal during the first weeks or months of lithium treatment, returned to normal when lithium prophylaxis was maintained for years; (2) a possible explanation for the higher T3-serum concentrations in responders might be that lithium interacts with thyroid hormone metabolism in the CNS, leading to enhanced T3 concentrations in the tissue and to a secondary increase in the serum concentrations of T3.

Adult↗

PubMed1995

Hypothalamic-pituitary-gonadal axis, prolactin, and cortisol in alcoholics during withdrawal and after three weeks of abstinence: comparison with healthy control subjects.

Serum concentrations of luteinizing hormone, follicle-stimulating hormone, testosterone, androstenedione, estradiol, sex hormone-binding globulin, cortisol, and prolactin were measured in 12 male chronic alcoholics once during withdrawal and once after 21 days of abstinence. The results were compared with those of 14 healthy volunteers. During withdrawal, luteinizing hormone, estradiol, and cortisol levels were significantly enhanced. Estradiol and cortisol concentrations fell significantly during abstinence, whereas luteinizing hormone concentrations remained elevated. The results may be interpreted as follows: the well-known inhibitory effect of alcohol on the biosynthesis of testosterone may have led to a compensatory increase in luteinizing hormone secretion, so that normal serum concentrations of testosterone were maintained. On the other hand, peripheral conversion from androstenedione to estradiol via aromatase pathways seemed to be enhanced in chronic alcoholics, at least during withdrawal. Whether this marked increase in estradiol concentrations is implicated in different clinical and psychological symptoms seen in chronic alcoholics remains to be investigated.

Adult↗

PubMed1995

Dopaminergic responsivity in alcoholism: trait, state, or residual marker?

OBJECTIVE: In order to classify neuroendocrine abnormalities in alcohol-dependent patients as trait, state, or residual markers, growth hormone (GH) secretion was assessed longitudinally. METHOD: GH secretion, stimulated by the dopaminergic agonist apomorphine, was evaluated in 21 alcohol-dependent patients (16 men, five women) and 10 healthy comparison subjects (eight men, two women). The patients were tested during early withdrawal, after 8 days of abstinence, and after 3 months. RESULTS: Patients who relapsed within 3 months (N = 8) showed significantly less GH secretion in all neuroendocrine tests than did either the patients who abstained from ethanol consumption for 6 months (N = 13) or the healthy comparison subjects. The relapsers and abstainers did not differ significantly in any of their clinical or pathophysiological data, in the severity of their withdrawal symptoms, or in antecedent or concomitant illnesses associated with alcoholism. CONCLUSIONS: GH blunting appears to be a residual marker of clinical relevance in alcoholism.

Adult↗

PubMed1995

Blunted growth hormone response is associated with early relapse in alcohol-dependent patients.

Growth hormone (GH) secretion, stimulated by the dopamine D1 and D2 receptor agonist apomorphine, was assessed in 55 alcohol-dependent patients before detoxification (on the day of admittance to hospital) and after 7 days of treatment on the ward (day 8). Patients who relapsed early (i.e., within 3 months after detoxification) showed significantly blunted GH secretion before detoxification, compared with both healthy controls and patients who abstained for 6 months. Among early relapsing patients, GH secretion was blunted whether or not patients were acutely intoxicated on the day of admittance to hospital. However, for patients who abstained during observation, a blunting effect of acute ethanol consumption on GH secretion was demonstrated. On day 8, a trend toward blunted GH secretion was found in early relapsing patients only when GH response over infusion time was assessed. Therefore, GH blunting, and no other variable indicating the clinical course of the disease, was associated with early relapse in alcohol-dependent patients. These findings are evidence of reduced dopamine receptor function in a subgroup of early relapsing alcohol-dependent patients during chronic intoxication.

Adult↗

PubMed1994

The effect of FK506 versus cyclosporine on glucose and lipid metabolism--a randomized trial.

In order to evaluate the effect of cyclosporine (CsA) versus FK506 on glucose and lipid metabolism, an oral glucose tolerance test (OGTT) was performed in 101 patients after orthotopic liver transplantation (OLT) (mean interval after OLT: 511 days). The liver graft recipients had been randomized prospectively to two groups prior to OLT to receive either immunosuppression with CsA, azathioprine, and corticosteroids (CsA group) or FK506 and corticosteroids (FK group). Along with the OGTT, serum insulin, insulin C-peptide and glucagon as well as serum lipids were monitored. There was no statistically significant difference in the occurrence of impaired glucose tolerance (IGT) or manifest diabetes mellitus disease between the two groups. In fact, not a single patient developed new-onset diabetes in any group. In male and female patients, serum levels of cholesterol and triglycerides increased significantly under FK506 and CsA treatment after OLT. Cholesterol was significantly higher in the CsA group in men, in women this was marked, but not significant. While triglycerides were significantly higher in women on CsA treatment, there was no such difference in men. In conclusion, both CsA and FK506 proved to have similar effects on glucose metabolism, while there was a different spectrum of serum lipid alterations.

Adolescent↗

PubMed1994

Psychological and endocrine abnormalities in refugees from East Germany: Part I. Prolonged stress, psychopathology, and hypothalamic-pituitary-thyroid axis activity.

The influence of prolonged psychological stress on hormonal secretion was investigated in 84 East Germany refugees suffering from psychiatric disorders within 6 weeks of their arrival in West Berlin shortly before or after the fall of the Berlin Wall. Before leaving the German Democratic Republic, these patients had already experienced prolonged stress, which continued after migration. In most cases, the diagnosis was anxious-depressive syndrome with vegetative complaints and symptoms of increased arousal. Their formal DSM-III-R diagnoses (American Psychiatric Association, 1987) included adjustment disorders, depressive disorders, and anxiety disorders (the latter including posttraumatic stress disorder). Serum levels of thyroid stimulating hormone (TSH) and thyroid hormones (thyroxine, free thyroxine, triiodothyronine, and reverse triiodothyronine) were measured and compared with those of 20 healthy control subjects. TSH and all thyroid hormone concentrations were significantly reduced in the patient group. Fifty-two of the patients (62%) were in the hypothyroid range but did not show any clinical signs of hypothyroidism. These disturbances in hormonal secretion were not correlated to any psychiatric diagnosis or to the severity of acute or chronic stress. The marked abnormalities in the hypothalamic-pituitary-thyroid axis seen in these refugees differ from those reported in depression and would seem to reflect severe chronic stress rather than specific psychiatric disorders. The underlying neurochemical mechanisms remain to be investigated.

Adjustment Disorders↗

PubMed1994

Psychological and endocrine abnormalities in refugees from East Germany: Part II. Serum levels of cortisol, prolactin, luteinizing hormone, follicle stimulating hormone, and testosterone.

We investigated afternoon serum levels of cortisol, prolactin, luteinizing hormone (LH), follicle stimulating hormone (FSH), and testosterone in a group of 84 refugees who had fled from East to West Germany and suffered from psychiatric disorders within 6 weeks of their arrival in West Berlin. The mean hormone levels were compared with those of healthy control subjects. Cortisol levels were lower and LH levels were higher in the patients than in the control subjects, but only at trend levels of significance. No differences were found between the prolactin, FSH, or testosterone concentrations of the two groups. The patients with major depressive disorder (MDD) had a significantly higher mean cortisol level than the mean levels in the subgroups in whom posttraumatic stress disorder, dysthymia, and adjustment disorder were diagnosed. It can be concluded that the hypothalamic-pituitary-adrenal axis may "adapt" during severe long-term psychological stress and that long-term stress may be only one of the neurochemical mechanisms underlying the hypercortisolemia in patients with MDD.

Depressive Disorder↗

PubMed1994

[[111In]-DTPA-D-phenylalanine octreotide SPECT for the scintigraphic imaging of enhanced somatostatin-receptor density in endocrine ophthalmopathy].

Recently, [111In]-DTPA-D-phenylalanine-octreotide was introduced for clinical use. This radioligand binds specifically to somatostatin receptors and is suitable for SPECT examinations. The aim of this study was to clarify whether an increased somatostatin receptor density can be imaged and quantified in patients with endocrine ophthalmopathy (e.o.). 7 patients between 34 and 55 years with e.o. at stages III to VI and 4 controls between 38 and 63 years were examined. All patients and controls received approximately 200 MBq [111In]-DTPA-D-phenylalanine-octreotide by IV injection. A SPECT examination was performed 4 hours after injection and a normalised tracer uptake (A(n)) was calculated for both orbitae. In patients with e.o. the values of A(n) were significantly higher compared with controls (P = 0.002). There was a correlation between A(n) and exophthalmus stages according to Hertel with r = 0.844 (P = 0.001). These results indicate that [111In]-DTPA-D-phenylalanine-octreotide SPECT might be useful for the in vivo assessment of an increased somatostatin receptor density in e.o. These findings could have an impact on the treatment with somatostatin analogous in e.o.

Adult↗

PubMed1994

Hypothalamic-pituitary-thyroid (HPT) axis in chronic alcoholism. I. HPT axis in chronic alcoholics during withdrawal and after 3 weeks of abstinence.

Thyroxine (T4), free T4 (fT4), triiodothyronine (T3), free T3 (fT3), reverse T3 (rT3), thyrotropin (TSH), thyroxine binding globulin (TBG), and T3 uptake were measured in 14 chronic alcoholics during withdrawal and after 21 days of abstinence. Results were compared with those of 16 healthy volunteers. During withdrawal, the fT4 and fT3 concentrations were subnormal, whereas the respective protein-bound fractions were normal. T4, T3, and TBG increased during the abstinence period, T3 and TBG being significantly higher than in normals at the second measuring time. T3 uptake values fell, but remained well within the normal range at both measuring times. During abstinence, the fT3 levels remained significantly lower than in healthy subjects. rT3 concentrations decreased, but not significantly. The TSH values were normal throughout. These results showed numerous abnormalities in the hypothalamic-pituitary-thyroid axis in alcoholics, the reasons for which are as yet unclear. The following possible interpretations are suggested: 1. The abnormally low serum fT3 and fT4 levels during withdrawal might reflect an increase in tissue uptake. 2. The increases in T4--and partly those in T3--during abstinence seem to reflect increased binding by TBG, the level of which rose markedly for reasons as yet unknown. 3. If increases in TBG during abstinence are taken into account, the decreases in rT3 concentrations may reach the level of statistical significance. These falls in rT3 concentrations may reflect an increase in rT3 metabolization (deiodination) in various tissues, including the CNS, leading to a reduction in serum rT3 bioavailability. 4. Factors such as liver disease, protein caloric malnutrition, and "psychological stress" do not fully explain all these abnormalities. A direct effect of ethanol on intracellular thyroid hormone metabolism and/or function seems conceivable.

Adult↗

PubMed1993

Influence of partial sleep deprivation on the secretion of thyrotropin, thyroid hormones, growth hormone, prolactin, luteinizing hormone, follicle stimulating hormone, and estradiol in healthy young women.

The influence of partial sleep deprivation during the second half of the night on the secretion of thyroid stimulating hormone (TSH), thyroxin (T4), free T4 (fT4), triiodothyronine (T3), prolactin (PRL), growth hormone (GH), luteinizing hormone (LH), follicle stimulating hormone (FSH), and estradiol (E2) was investigated in 10 healthy young women. Blood samples were drawn at hourly intervals over a 64-hour period (i.e., 3 consecutive days and nights). During night 2, all subjects were awakened at 1:30 a.m. During partial sleep deprivation, TSH concentrations increased significantly and remained elevated throughout the following day. Levels of T4, fT4, and T3 were enhanced during the partial sleep deprivation hours only, and changes in these hormones seemed to be independent of TSH. PRL levels decreased, LH and E2 concentrations increased, and GH and FSH secretion remained unchanged during partial sleep deprivation. This pattern of change of different endocrine axes during partial sleep deprivation resembles those seen after total sleep deprivation, suggesting that similar neurochemical changes are induced by both forms of antidepressant therapy. The late evening GH peak occurred almost exclusively before the onset of sleep. Partial sleep deprivation did not influence the chronobiological profiles of any of the hormones investigated. The chemical changes underlying these alterations are speculated to involve enhancement of central norepinephrine and dopamine activity with a concomitant increase in the activity of the sympathetic nervous system.

Adult↗