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Biomedical subjects

H Miller

Publications and source records attributed to H Miller.

At least 217 records · Page 12Linked to original sources
PubMed1975

Observations of pressure waves in stomach, jejunal, and colonic loops used to replace the esophagus.

The motility characteristics of the stomach, upper jejunum, and right colon were studied in 25 patients in whom these organs were used to replace the resected esophagus. The pattern of motility in all three replacement organs generally was similar to that recorded in normal individuals by other workers. But the stomach replacement showed a greater percentage of Type 1 waves, and Type II contractions were weaker. Activity in the jejunal replacements was much reduced. A propagated pressure wave was observed on swallowing water in the jejunal replacements. The nature of this wave needs further elucidation. The functional result was good, except in patients with a weak or without an upper esophageal sphincter. Patients experienced no pain during the test and no side effects were observed.

Colon↗
PubMed1974

Effects of a low-oestrogen oral contraceptive on urinary excretion of luteinizing hormone and ovarian steroids.

The urinary gonadotrophin and ovarian steroid excretion pattern was studied in five women taking an oral contraceptive formulation consisting of mestranol 50 mug and norethisterone 1 mg. Both the pretreatment and post-treatment cycles were normal. The ovulatory peak of luteinizing hormone (LH) during the treatment cycles was uniformly suppressed, but LH continued to be excreted within the normal range. In one fifth of the treatment cycles there was a pronounced and sustained rise of oestrogen output in the absence of ovulation, and in many of the other treatment cycles oestrogen levels suggested that active ovarian steroidogenesis was taking place.

Adult↗
PubMed1974

Induction of aryl hydrocarbon (benzo(a)pyrene) hydroxylase and tyrosine aminotransferase in hepatoma cells in culture.

In the Reuber (H35) hepatoma cell strain, microsomal aryl hydrocarbon (benzo[a]pyrene) hydroxylase is induced 25-fold by the polycyclic hydrocarbon benz[a]anthracene but is not induced by the steroid hormone dexamethasone. Soluble tyrosine aminotransferase is induced sixfold by dexamethasone and twofold by benz[a]anthracene. Each enzyme requires similar inducer concentrations for induction, and their induction kinetics are similar. The induction of each enzyme requires RNA and protein synthesis; in each case the transcriptional and translational steps can occur independently. The two induction systems are differentially sensitive to inhibitors of macromolecular synthesis. Simultaneous exposure to both inducers produces increases in both enzyme activities that are greater than those produced by either inducer alone. Each inducer acts at a pretranslational level to produce this synergistic effect. The results suggest that the requirements for macromolecular synthesis are similar for the induction of each enzyme, but that the turnover of enzyme-specific macromolecules may differ for each.

Animals↗
PubMed1973

Non-specific factors that may influence significance of urinary steroid excretion in breast cancer.

The urinary excretion of corticosteroids (17-oxogenic steroids) and adrenal androgens (11-deoxy-17-oxosteroids) was studied in women below the age of 50 in a variety of clinical situations for comparison with a normal group. The conditions studied were: chronic debility from non-malignant disease, weight reduction, admission to hospital and surgery for varicose veins, hepatic non-malignant disease, and non-mammary cancer.The objective of the study was to determine whether the changes found in early and advanced breast cancer and used to judge the prognosis of the disease are specific to the disease or are merely incidental to the degree of illness caused by the disease.Similar changes to those found in breast cancer-principally a reduction in the excretion of the androgens-were found in the women with severe hepatic disease and in advanced non-mammary cancer. These were also found to follow the effects of severe surgical stress.It is concluded that the changes found in breast cancer are a measure of the general systemic disturbance caused by the disease and are not due specifically to it. Nevertheless, the value of their prognostic significance remains unchallenged.

Adrenal Cortex Hormones↗