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Biomedical subjects

H Cooper

Publications and source records attributed to H Cooper.

At least 73 records · Page 4Linked to original sources
PubMed1987

Processing of the precursor to the major merozoite surface antigens of Plasmodium falciparum.

Specific sequences derived from the gene for the precursor to the major merozoite surface antigens (PMMSA) of Plasmodium falciparum have been expressed in Escherichia coli and the products have been used to produce antibodies. These antibodies, together with monoclonal antibodies, have been used to investigate the form of the PMMSA protein associated with merozoites. Polypeptide fragments derived by processing from the PMMSA protein have been detected in extracts of merozoites and assigned to locations within the PMMSA coding sequence.

Animals↗
PubMed1986

Immunohistochemical and ultrastructural study of unusual IgM lambda lymphoplasmacytic tumor of the lacrimal gland.

A 72-year-old man developed a slowly enlarging mass involving the left lacrimal gland. Excisional biopsy disclosed a lymphoplasmacytoid tumor which was found by immunohistochemistry techniques to be a monoclonal proliferation, expressing cytoplasmic IgM lambda. However, serum protein immunoelectrophoresis disclosed a monoclonal spike in the gamma-globulin region with IgG lambda. The patient was still systemically well with no evidence of lymphoma almost ten years after the initial recognition of the lacrimal gland mass. This unusual case demonstrated the difficulty of classifying orbital lymphoid tumors and the problems of accurately predicting the clinical course and prognosis in affected patients.

Aged↗
PubMed1986

Oestriol with oestradiol verses oestradiol alone: a comparison of endometrial, symptomatic and psychological effects.

In a prospective, double-blind, randomized, cross-over trial, the effects of oral oestradiol, 2 mg daily, on the endometrial histology, frequency and severity of vaginal bleeding, and the symptomatic and psychological status of postmenopausal women were compared with those of oral oestradiol, 2 mg daily, plus oestriol, 1 mg daily. Both therapies were prescribed for 3 months on a cyclical basis. The addition of oestriol to oestradiol did not modify the endometrial response. The prevalence of proliferative/hyperplastic endometrium (64%: 9 of 14 biopsies) was similar after both treatments and there were no significant differences in either the frequency or heaviness of vaginal bleeding. Both therapies significantly reduced hot flushes, night sweats and vaginal dryness: no significant differences in effect on the symptomatic and psychological status were recorded. The addition of 1 mg of oestriol to 2 mg of oestradiol did not confer any benefit and the value of such an addition is challenged.

Adult↗
PubMed1985

Parallel characterization of bovine von Willebrand protein (factor VIII-associated protein) by light scattering and SDS gel electrophoresis.

Highly purified bovine von Willebrand protein (vWP) has been studied with two complementary techniques. Light scattering measurements on different samples give weight average molecular weights in the range from 7 to 13 million, radius of gyration between 75 and 140 nm and diffusion coefficient near 4.15 X 10(-8) cm2/sec. Scans after electrophoresis in sodium dodecyl sulfate on 2% agarose gels, stained with Coomassie blue, allow calculation of a mass distribution over a series of oligomers with relative size in a range from 1 to 20. The ratio of the average mol. wt. from light scattering and the average size for the observed distribution, which is the mol. wt. increment for successive vWP oligomers, has been determined and found to be 1.0 million. This implies that the molecules of vWP are oligomers of subunits themselves consisting of 4 polypeptide chains each of mol. wt. circa 250,000.

Animals↗
PubMed1984

Association of subacute motor neuronopathy with thymoma.

A case of subacute motor neuronopathy in association with thymoma is described. Subacute motor neuronopathy is marked by a painless, progressive, and asymmetric muscle weakness that usually affects the lower extremities. It is a rare paraneoplastic effect of tumors that has been described with both Hodgkin's and non-Hodgkin's lymphoma. This is the first case report of its association with thymoma.

Humans↗
PubMed1982

Perinatal coaching--a new beginning.

A hospital-based perinatal coaching program fosters communication between first-time parents and their infants. Support provided includes learning about babies' individual differences, normal responses, bonding principles, modeling techniques, early childhood development, as well as realistic expectations of new parents.

Adult↗
PubMed1981

Use and misuse of the tape-measure as a means of assessing muscle strength and power.

The tape-measure is frequently used by the medical profession to assess muscle function following injury. It is assumed that increasing limb girth is reflected by increasing muscle power and strength; but this assumption is empirical and may not in practice be justified. The relationship between thigh circumference and muscle strength and power, measured as the torque produced on an isokinetic dynamometer, was assessed in 64 subjects--24 non-injured sportsmen and 40 injured sportsmen. The correlation between the torque produced at the knee by the knee extensors and flexors and the thigh circumference at three levels was not significant in either group. Comparison of the injured with the non-injured limb also failed to show any correlation. By contrast, in eight subjects, repeated measurements over a six to eight month period showed a significant relationship between change in thigh circumference and change in quadriceps power. It is concluded that a single measurement of circumference at the same point in both thighs of a subject with unilateral injury should not be used as an assessment of muscle function. Serial measurements, however, at the 4 and 10 cm levels may be of value as an index of quadriceps power. Reasons for this are discussed.

Adolescent↗
PubMed1981

Treating adolescent obesity: a pilot project in a school.

A weight control program for junior high school students was developed to change eating, exercise and habit patterns. The course included dietary management, physical activity and behavior modification techniques. Classes were structured to emphasize peer group involvement and daily practical application. The curriculum was compiled in a book for educational personnel. The program was tested as a pilot project with a selected group of eighth grade obese adolescent girls and a comparison group. Immediately after the course, the subjects' percent of overweight had decreased; at a subsequent eight-month follow-up, additional losses were noted. The percent of overweight of the girls in the comparison group remained relatively unchanged. While the program was successful with this particular group of students, several key questions, requiring further study, were defined.

Adolescent↗
PubMed1979

A physiological role for calcitonin: protection of the maternal skeleton.

Plasma-calcitonin levels, measured with an established and reliable extraction radioimmunoassay technique, were significantly higher throughout normal pregnancy and lactation than in normal non-pregnant women, and were not immediately influenced by the acute stimulation of breast-feeding. Thus, more calcitonin circulates at times of physiologically increased calcium need. It is suggested that an important function of calcitonin is the protection of the healthy maternal skeleton from excessive resorption by opposing the resorptive action of 1,25-dihydroxycholecalciferol on bone.

Adolescent↗
PubMed1977

Spurious primary amenorrhoea: a case report.

An unusual case of 'primary amenorrhoea' is described, in which clinical, cytogenetic, biochemical and hormonal features were all normal. Failure to obtain withdrawal uterine bleeding after therapy with a combined oestrogen/progestagen preparation, together with the finding of normal cyclical oestrogen and progesterone secretion, the latter reaching normal luteal phase levels, strongly suggested end-organ (endometrial) failure. However, 6 weeks after a searching interview by one of us (H.C.), during which sufficient evidence was uncovered to implicate major emotional factors as contributing to her state of amenorrhoea, the patient began menstruating and has menstruated regularly ever since. It is likely that the patient denied the existence of her menstrua and that the term 'spurious' primary amenorrhoea would most appropriately described this condition.

Adolescent↗