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Biomedical subjects

G Cameron

Publications and source records attributed to G Cameron.

At least 37 records · Page 2Linked to original sources
PubMed1994

Resident participation in the Better Beginnings, Better Futures prevention project: Part II--Factors that facilitate and hinder involvement.

Resident participation is the cornerstone of any community-based prevention program. However, many challenges exist which make it difficult to involve residents in a meaningful way in the development of such programs. How can programs be organized so as to provide for significant participation of community residents in the process of program development? This article outlines the procedures that were utilized in seven community-based prevention programs established under the Better Beginnings, Better Futures initiative of the Government of Ontario to enlist the participation of community residents in program decision making and implementation.

Affective Symptoms↗
PubMed1993

The effects of World Health Organization chemotherapy on imported leprosy in Auckland, New Zealand, 1983-90.

Between January 1983 and December 1990 in Auckland, New Zealand, 87 patients (28 paucibacillary disease (PBD) and 59 multibacillary disease (MBD)) commenced WHO multidrug therapy (MDT). All were immigrants from the Pacific Islands (65) or Asia (22). A total of 57 patients had already received non-WHO regimens, some continuously, but often intermittently, for many years; 30 patients received WHO MDT only. By December 1990, 50 had completed treatment, with 1 relapse and 1 late reaction, both in patients with PBD treated with WHO MDT only. There have been no relapses in those treated with WHO MDT after prior leprosy treatment. In those with MBD, type II leprosy reactions were less common (16%) in those treated only with WHO MDT than in those treated continuously before 1983 with older regimens (64%). Type I leprosy reactions occurred in about 20% of both these groups. The bacterial index fell faster in those who had had a prolonged prior treatment beginning WHO MDT than in those starting WHO MDT as their initial leprosy chemotherapy. Overall we found WHO MDT was well accepted and the compliance good, but 13 patients (15%) left Auckland before treatment was completed and 6 (7%) during follow up.

Asia↗
PubMed1992

Consistent policy?

Explore the source record for details and available documents.

Base Sequence↗
PubMed1990

New services of the EMBL Data Library.

The existing services of the EMBL Data Library for external users have been improved and extended in several ways. The EMBL File Server has been reorganised, and many new databases and other information relevant to biologists are now accessible via global computer networks. A broad range of software for molecular biology is freely available for different popular computer systems, including the EMBL enhancements to the Wisconsin (GCG) Package. The new Mail-Quicksearch and Mail-FastA services give access to the latest sequence data for database searches by ordinary electronic mail.

Animals↗
PubMed1989

Mechanisms of asbestos-induced squamous metaplasia in tracheobronchial epithelial cells.

Within 1 to 4 weeks after exposure to asbestos, differentiated rodent and human tracheobronchial epithelial cells in organ culture undergo squamous metaplasia, a putative preneoplastic lesion characterized by conversion of mucociliary cell types to keratinizing cells. The exogenous addition of retinal acetate (RA) to culture medium of hamster tracheal organ cultures reverses preestablished, asbestos-induced squamous metaplasia, although data suggest that the effectiveness of RA decreases as the length of time between exposure to asbestos and initial application of RA increases. alpha-Difluoromethylornithine (DFMO), an irreversible inhibitor of ornithine decarboxylase (ODC), inhibits squamous metaplasia caused by asbestos or vitamin A deficiency, whereas addition of methylglyoxal bis(guanylhydrazone) (MGBG), a structural analog of spermidine and inhibitor of S-adenosylmethionine decarboxylase, causes an enhancement of metaplasia under both circumstances. Basal cell hyperplasia and increased incorporation of 3H-thymidine by tracheal epithelial cells also are seen after addition of the polyamines, putrescine or spermidine, to tracheal organ cultures, an observation supporting the importance of polyamines in the development of this lesion. The use of retinoids and inhibitors of ODC could be promising as preventive and/or therapeutic approaches for individuals at high risk for development of asbestos-associated diseases.

Animals↗
PubMed1988

Muscle and bone in paraplegic patients, and the effect of functional electrical stimulation.

1. Four paraplegic men volunteered for an exercise programme in which their paralysed quadriceps muscles were stimulated by means of computer-regulated electrical impulses applied through external electrodes. The first exercise regimen consisted of leg raising against a graded load, and during the second regimen exercise took the form of cycling on a modified bicycle ergometer. Each subject exercised five times weekly for 10 weeks during the first regimen and 32 weeks during the second regimen. 2. Whole-body protein turnover determined by L-[1-13C]leucine during feeding remained constant during both exercise regimens, when expressed either in terms of body weight or fat-free mass derived from measurements of total body potassium. 3. Quadriceps muscle protein synthetic rate increased during the study, from 0.0712 to 0.0985%/h (P less than 0.05), as did quadriceps muscle area assessed by computed tomography. 4. Bone mineral content for lumbar vertebrae was normal in all four patients, but for the femoral mid-shaft bone mineral content averaged only 66% of normal for three of the patients. Trabecular bone density in the distal tibia ranged from normal to 2% of normal for the men with the shortest and longest periods of disability, respectively. No changes in bone mineral content or bone density occurred during the exercise period.

Adult↗
PubMed1987

Stress-relief osteoporosis of the anterior femoral condyles in total knee replacement. A study of 185 patients.

A study has been conducted to examine anterior femoral condylar osteoporosis. A series of 65 ICLH knees with a more than four-year follow-up and a series of 120 Tricon P knees were examined radiologically. It was found that almost all cases showed anterior femoral condylar osteoporosis beginning at three months and stabilizing at two years. It was more severe in those with rheumatoid arthritis than in those with osteoarthritis. This type of osteoporosis can be prevented by using a layer of cement more than 7 mm thick or by using reinforcing screws in the condyles. Femoral component loosening leads to regression of the changes. This osteoporosis does not give rise to for revision arise in a case of this type, bone should be available for grafting the anterior femoral condyles.

Adult↗
PubMed1984

Locating peptides generated by limited proteolysis in known protein sequences by means of computer search.

A computational method is presented for locating peptides on known protein sequences using their molecular weights (estimated by SDS polyacrylamide gel electrophoresis) and their composition (obtained by amino acid analysis from eluted gel bands). The technique is easy and rapid, and appears particularly valuable if recoveries of peptides are low, or if they are heterogeneous due to secondary proteolytic degradation. An analysis of limited proteolysis of maltoporin (Schenkman, S. et al. [1984] J. Biol. Chem. 259, 7570-7576) is used to illustrate applicability and reliability of the method, which can also be applied to confirm gene-derived sequences.

Amino Acid Sequence↗
PubMed1984

Two epizootics of lymphocytic choriomeningitis virus occurring in laboratory mice despite intensive monitoring programs.

Two epizootics of lymphocytic choriomeningitis virus in mice occurred within two months in one research facility consisting of several widely separated rooms. These outbreaks developed despite intensive institutional monitoring policies designed to prevent introduction and spread of lymphocytic choriomeningitis virus. Evidence derived from serological and virological assays and interviews with the concerned investigators suggested that a single transplantable tumor carried in mice may have been responsible for spread of the virus. However, the tumor was not contaminated with lymphocytic choriomeningitis virus at the time of its introduction into the mouse facility. The origin of the virus responsible for the outbreaks was not definitively established although data supported an hypothesis that the virus was introduced into the research facility by a wild or feral mouse. Virus spread from infected mice to humans did not occur, as measured by serological tests. However, a large and valuable animal facility was depopulated for safety reasons. Absorption of sera with lymphocytic choriomeningitis virus antigen proved a necessary and reliable method for confirming specificity of lymphocytic choriomeningitis virus fluorescence-positive reactions.

Animals↗
PubMed1983

Central venous catheters for out-patient management of malignant disorders.

The use of tunnelled central venous catheters in children with malignant disorders is an effective and safe way of giving out-patient chemotherapy and supportive care. The benefits include ready venous access, ease of administration of chemotherapy, decreased time spent in the out-patient clinic, and less anticipatory vomiting and emotional trauma for patients, parents, and staff.

Adolescent↗
PubMed1979

Primate disease and breeding rates.

33 species were compared for 12 disease categories over 3 years of laboratory housing. There were low correlations between popularity, birth, death, and illness rates. Highest rates were: birth, Macaca nemestrina; illness, Pongo pygmaeus; death, Cercopithecus aethiops. Lowest rates were: birth, Lemur catta; illness, Sanguinus mystax; death, Galago crassicaudatus. Galago crassicaudatus and Macaca fasicularus had low disease and high birth rates.

Animal Diseases↗