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Biomedical subjects

R Dudczak

Publications and source records attributed to R Dudczak.

121 records · Page 7Linked to original sources
PubMed1979

Familial thyroxine-binding globulin deficiency in association with non-toxic goitre.

A kindred is presented in which 4 members in 3 generations showed absent or reduced serum concentrations of thyroxine-binding globulin (TBG). TBG was undetectable by radioimmunoassay in one male and decreased to varying extent in 3 female patients (4.0, 4.2 and 8.6 microgram/ml; normal range 12.5--26.0 microgram/ml). Total thyroxine serum concentrations in the affected subjects were well in the hypothyroid range without clinical evidence of hypothyroidism. The mode of transmission of the trait was consistent with X-chromosome linkage. A high incidence of non-toxic goitre was also present in most of the family members examined irrespective of TBG levels. The transmission of the goitre trait was compatible with autosomal dominant inheritance. Thus its association with transmission of TBG deficiency was interpreted as not causal but coincidental.

Adult↗
PubMed1979

[Indication and value of erythrokinetic examinations in anemia].

As erythrokinetic studies are time consuming and costly, this technique should only be done to provide information which is unavailable through simpler tests. By means of discussion concerning the methodological procedure and obtainable information, the indications for erythrokinetic investigations with Cr 51 and Fe 59 are derived. Since the results should be interpreted together with the clinical and haematological findings, a close cooperation of the departments of nuclear medicine and haematology would be essential.

Anemia↗
PubMed1978

[Growth hormone and diabetic retinopathy (author's transl)].

Changes in the serum level of growth hormone have been studied in 28 diabetics (6 exhibiting no diabetic retinopathy (d. r.), 10 displaying a non proliferative d. r., 6 having proliferative d. r., and 6 Brittle-diabetes) together with a control group consisting of 11 subjects (5 being totally healthy, and 6 having acromegaly without d. r.). Blood samples were obtained before and after arginine and glucagon administration and also following controlled exercise on the ergometer with 50% of the actual working capacity during 20 minutes. The presence of d. r. and its stage has been determined by fluorescein angiography. Our results demonstrate that an increased secretion of growth hormone in diabetics actually constitutes a manifestation of metabolic instability. Apparantly no correlation exists between the appearance of d. r. or its stage and the degree of growth hormone release.

Acromegaly↗
PubMed1978

[Pulmonary metastatic calcifications in malignant lymphoma demonstrated by imaging agents. Case report (author's transl)].

This report describes a patient with malignant lymphoma and hypercalcemic crises. A bone scan showed pronounced uptake of 99mTc-Methylene diphosphonate (MDP). This finding is thought to be due to metastatic lung calcification, which absorbs skeletal radiopharmaceuticals. The developement of metastatic calcifications in this case is most likely caused by phosphate applications to treat hypercalcemia. The mechanisms of formation and the detection of metastatic lung calcification with 99mTc-MDP are discussed.

Calcinosis↗
PubMed1977

The diabetogenic action of somatostatin in healthy subjects and in maturity onset diabetics.

To determine whether cyclic somatostatin (GH-RIH) interferes with glucose utilization and gluconeogenesis we studied levels of blood glucose (BG), immunoreactive insulin (IRI), immunoreactive glucagon (IRG) and of human growth hormone (GH) after iv glucose (330 mg/kg) and iv arginine (0.5 g/kg) in healthy subjects (n=8) and in maturity onset diabetics (n=8; fasting BG less than 200 mg/dl) both in the presence and in the absence of GH-RIH (500 microng/h iv). GH-RIH caused a reduction of glucose utilization in healthy subjects as shown by the decrease of the k-value from 2.08+/-0.22 (SE) % per min to 0.61+/-0.06 (SE) % per min (P less than 0.0005). No significant change of the glucose disappearance rate was observed in maturity onset diabetics by GH-RIH (kI=0.55+/-0.14 (SE) % per min; kII=0.42+/-0.03 (SE) % per min). The response of insulin to glucose was abolished by GH-RIH. The glucose induced suppression of IRG was in part significantly enhanced by GH-RIH in maturity onset diabetics (P less than 0.01). BG rises seen after iv arginine were increased by the administration of GH-RIH both in healthy subjects (P less than 0.001) and in maturity onset diabetics (P less than 0.05). Somatostatin abolished IRI and GH responses to arginine in both groups studied (P less than 0.001). IRG increases after arginine administration were diminished by GH-RIH in both groups (P less than 0.01). Our data demonstrate that GH-RIH impairs the iv carbohydrate tolerance in healthy subjects and facilities an increased hepatic glucose output upon administration of arginine both in controls and in maturity onset diabetics. We attribute the diabetogenic effect of somatostatin to suppression of IRI release rather than to changes in the IRG/IRI ratio in favor of IRG.

Adult↗
PubMed1975

[Blood glucose and immunoreactive insulin in children with diabetic siblings and diabetic mothers (author's transl)].

The study was designed to examine the behaviour of blood glucose (BG), serum immunoreactive insulin (IRI) and of the insulinogenic index after an oral glucose load in children with a history of familial diabetes mellitus (D.m). Oral glucose tolerance tests (50 g/m2) were performed both without (OGTT) and after pretreatment with 2 times 5 mg Prednisolon within 12 hrs (CGTT) in 25 children with diabetic siblings (group I) and in 13 children with diabetic mothers (group II). Subjects fitting the criteria for An normal OGTT as established by Fajans and Conn and 5 children with clinical D.m. served as controls. Seventeen children of group I had a normal OGTT, 8 (32%) presented with either latent (N = 4) or asymptomatic (N =4) D.m. Six children (46%) with diabetic mothers (group II) had a normal OGTT, 7 (54%) presented with either latent (N = 4) or asymptomatic (N = 3) Dm. Children of ideal weight and with latent D.m. responded to an OGTT with an either normal or an elevated insulin release, and showed during the CGTT a distinctly increased insulin release when compared with healthy subjects. Insulin secretion in children with asymptomatic D.m. was smaller both upon OGTT and CGTT than that of children with latent D.m. but not significantly different from that of healthy subjects. The insulinogenic index was maximal in healthy obese children, it was normal in latent and in asymptomatic, and lowest in clinical diabetics. In conclusion it appears that in children the initial stage of D.m. (i.e. latent and subclinical D.m.) is not necessarily linked to hypoinsulinemia.

Adolescent↗
PubMedDate not supplied

[Calcium-phosphate metabolism in chronic polyarthritis].

20 patients suffering from rheumatoid arthritis were studied to evaluate both, radiological and scintigraphic osseous changes, as well as possible disturbances in calcium phosphate metabolism. Joint and osseous alterations were assessed in all of them. Serum levels of magnesium, calcium, phosphate and alkaline phosphate were within the normal range, and also concurrent measurements of serum 25-OH-D3 concentrations and plasma levels of parathyroid hormone (PTH). However, in our patients with normal renal function, the plasma concentration of calcitonin (CT) was significantly elevated compared to normals (p less than 0.01). Our data indicate that in patients studied PTH and 25-OH-D3 does not contribute to the development and progression of osseous changes due to rheumatoid arthritis. Possibly the stimulatory effect of various osteolytic factors may cause as counterbalance elevations in plasma CT levels.

Adult↗