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Biomedical subjects

F Savage

Publications and source records attributed to F Savage.

4 recordsLinked to original sources

The chemoattractant activity of the vitreous to human scleral fibroblasts following retinal detachment and proliferative vitreoretinopathy.

The results are presented of a migration assay of scleral fibroblasts to 25% diluted vitreous samples from 27 patients with complex retinal detachments divided into three groups: group 1, no proliferative vitreoretinopathy (PVR); group 2, early PVR; and group 3, advanced PVR. There was a statistically significantly greater migration with vitreous samples from group 3 than with group 1 (p less than 0.0001) but no significant correlation for migration with the age of patients, duration of retinal detachment, or number of retinal procedures undertaken. Analysis of vitreous by gel electrophoresis showed that cellular migration was proportional to the number of peptide bands. Vitreous fibronectin levels were measured and there was a positive correlation between fibronectin in the vitreous samples and the migration of fibroblasts to the vitreous (r = 0.68, p less than 0.004).

Adult

The need for action.

Nutrition workers speculated about why poor mothers should decide to bottle feed, when their community in the past had apparently always breastfed effortlessly and successfully. Surveys cross-tabulated feeding methods against socioeconomic variables, but it was difficult to make use of the results. Few thought that there was anything we needed to learn about HOW to make breastfeeding succeed. There was also a tacit assumption that if you had the resources--for example if you were yourself an employed health worker--you could bottle feed safely, so there was no need to worry.

Bottle Feeding

Plasminogen activators in experimental colorectal neoplasia: a role in the adenoma-carcinoma sequence?

An important step in the transition from adenomatous polyp to invasive carcinoma is the degradation of the epithelial basement membrane. By the generation of plasmin, plasminogen activators may play an important role in regulating the extracellular protease activity required for this event to occur. The production of biofunctional urokinase and of tissue plasminogen activator was therefore investigated in the dimethylhydrazine induced rat model of colorectal neoplasia. Both adenomatous polyps (p values less than 0.001) and colorectal carcinomas (p values less than 0.001) were demonstrated to produce a significant excess of both urokinase and tissue plasminogen activator when compared with macroscopically normal colon. There was, however, no increased production of either enzyme by macroscopically normal preneoplastic colon when compared with control colon. This enhanced capacity of colorectal tumours to produce plasminogen activators and generate plasmin is thus a feature of both the premalignant as well as the malignant phenotype. These enzymes may contribute to the malignant potential of adenomatous polyps and to the invasive capacity of established carcinomas.

Animals