Search PubMed⌕ Search

Biomedical subjects

S M Milcu

Publications and source records attributed to S M Milcu.

At least 73 records · Page 4Linked to original sources
PubMedDate not supplied

Changes in the bioelectric activity of the lateral septal nucleus, dorsal hippocampus and medial habenular nucleus after administration of the pineal peptide extract "crinofizin".

New Zealand rabbits with pairs of electrodes implanted chronically in the RFM, dorsal hippocampus, LSN and HM were tasted for electroencephalographic changes in the dorsal hippocampus, lateral septal nucleus and medial habenular nuclei in response to electric stimulation of the mesencephalic reticular formation and after slow i.v. and i.m. injection with the pineal peptidic extract "Crinofizin". Stimulation of RFM with a rectangular current of variable tension (1.5--4 volts) induced synusoidal waves on the EEG of the dorsal hippocampus, LSN and HM with a frequency of 4 to over 8 c/s persisting throughout the electric stimulation. Intramuscular administration of 10 ml pineal extract in doses of 2 ml every 48 hrs led to changes in the EEG traces in that the mean frequency of the synusoidal waves decreased from 3.8 c/s to 1.4 c/s whereas the mean amplitude of the waves was almost threefold the mean amplitude of the background traces.

Animals↗
PubMedDate not supplied

Circadian rhythms of corticosterone and nucleic acids in the rat adrenal in relation to age.

For 3 successive days, at 0600, 1200, 1800 and 0000, the circadian variations of corticosterone, RNA and DNA were followed up in the adrenals of 3 lots of prebuertal (30 days old), adult (120 days old) and old (28 months old) white Wistar male rats. There is a correlation between the circadian rhythm of corticosterone secretion and the circadian rhythms of RNA and DNA synthesis all along ontogenesis. These rhythms appear to be formed at 30 days of life, but they still differ from the ones in the adult rats by the levels recorded in the second half of the nocturnal period. In old rats the adrenal circadian variations have a considerably smaller amplitude, their curve taking a plateau form. The results support the hypothesis of the circadian rhythm ontogenesis in the rat adrenal.

Adrenal Glands↗
PubMedDate not supplied

Cortisol circadian rhythm in 70--100-year-old subjects.

The circadian rhythms of plasma cortisol was examined in 25 persons aged between 70 and 100 years by comparison with 5 adults aged between 17 and 38 years. The blood samples were drawn at 16 hundred, 20 hundred, 00 hundred, 04 hundred and 08 hundred hrs. Cortisol was assayed by the fluorimetric method. The experimental data were analyzed by Halberg's mean-cosinor method. The results showed that the circadian rhythm in plasma cortisol changes with age. The characteristic phenomena found were the following: a tendency towards reducing the hourly quantitative differences, comparatively more marked between 90 and 100 years; anticipation of the cortisol maximum level of 08 hundred at 04 hundred hrs in the group of 71 to 80 years, and at 00 hundred hrs in some of the subjects older than 80. A normal circadian rhythm was found in 2 of the 25 cases examined. These changes imply variations of the same kind in the CRF and ACTH levels. The changes in the circadian rhythms of cortisol show that the regulation systems are also implied in the aging process. It is possible that early-morning insomnia of the aged be due to this anticipation in cortisol secretion.

Adolescent↗
PubMedDate not supplied

Blocking cybernosis in endocrine glands pathology.

The term cybernosis was proposed by Meerloo (1971) in order to designate the cybernetic functional disorders in senescence. Blocking cybernosis or bloking negative feedback is the term used for negative feedback perturbation in a neuro-endocrine subsystem caused by factors dwelling inside or outside it. Using the hypothalamo-hypophyso-adrenocortical subsystem as a model, the author shows that due to an excessive and anarchic secretion of corticoids by a tumor developed in the adrenocortical, the hypothalamo-hypophyseal control centers are blocked. A similar blockade occurs after longterm administration of high doses of a steroid, similar or identical to the natural corticoid hormone, which retro-acts like the latter. In the first case we deal with tumoral blocking cybernosis, in the second, with an iatrogenic one. As in both cases the subsystems are turned off without structural desorganization, the term blockade is more appropriate than that of disorder which implies the existence of a certain functional disability. Tumoral blocking cybernoses were seen by us in thyroid toxic adenoma, corticosteroid secreting adenomas and ovarian tumors; iatrogenic cybernoses occur in the long-term corticosteroid therapy in dermatoses, hirsutism, etc. Blocking cybernoses, both tumoral and iatrogenic, require great caution in their correction. Sudden removal of the blockade is followed by severe disorders producing collapse and coma with their implicit risk.

Biofeedback, Psychology↗
PubMedDate not supplied

Tuberculous thyroiditis cured by drug therapy.

A 73-year-old patient suffering from evolutive nodular goiter, free of other local complaints or changes in the general status is presented. A diagnosis of tuberculous thyroiditis with hypothyroidism is reached. This diagnosis is justified by the antecedents of the patient, positive IDR, low iodine uptake, characteristic scintigraphic and echographic picture of the thyroid. Following a treatment with tuberculostatics, potassium iodide and controlled life regimen for a year, thyroiditis was cured as proved by scintigraphic and echographic evidence, and normal iodine uptake and PBI.

Aged↗
PubMedDate not supplied

Morphology of T and B lymphocytes assessed by scanning electron microscopy (SEM) in thyroiditis and Graves's disease.

Scanning Electron Microscopy (SEM) assessment of the T and B lymphocytic sub-population shows alterations in cell immunity in the thyroid gland pathology. The mean per cent figure in 10 normal individuals was 68.8 for T lymphocytes (variation range: 50-83%) and 19.6 for B lymphocytes (variation range: 11-26%); in 12 untreated cases of Graves's disease the mean figure was 78.08% for T and 16.25% for B lymphocytes. The 15 patients with untreated thyroiditis showed a mean of 83.43% for T and 12.78% for B lymphocytes. The increased number of T lymphocytes is a proof of cell immunity alteration.

Acute Disease↗
PubMedDate not supplied

Research on the radioprotecting action of thymic polypeptides and timosterin B.

Administration of the TP2 polypeptidic thymic extract results in normalization of the rosette-forming capacity of the T spleen cells in the X-ray irradiated mouse. The radioprotecting effect was also noticed on the inhibition of macrophages migration in the X-ray irradiated rat inoculated with TH Salmonella typhi vaccine and treated with TP2 or with lipidic extract Timosterin B.

Animals↗