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Biomedical subjects

L Fellows

Publications and source records attributed to L Fellows.

8 recordsLinked to original sources
PubMed2006

Public involvement in modernising genitourinary medicine clinics: using general public and patient opinion to influence models of service delivery.

OBJECTIVES: To determine which of the options available to modernise genitourinary medicine (GUM) clinics in the UK are most acceptable to patients and potential patients; to assess whether the views of a general population sample differ from those of clinic attenders. . METHODS: A questionnaire was used to explore the acceptability of different ways of delivering sexual healthcare including the potential trade-off between convenience/range of services with cost/staffing constraints. Potential differences in responses by age, sex, ethnicity and current attendance at a GUM clinic were evaluated using multivariate analysis. RESULTS: 542 respondents in the community and 202 clinic attenders provided responses. Delivery of sexual healthcare by specialist nurses and general practitioners was acceptable to 81% and 72% of interviewees, respectively, assuming common protocols were adhered to. The proportion of individuals who would accept a consultation with a nurse increased to 91% if the waiting time for an appointment could be reduced as a result. Men were less likely to accept a consultation with a nurse (odds ratio (OR) 0.52, 95% confidence interval (CI) 0.35 to 0.79), and Asian (OR 0.38, 95% CI 0.23 to 0.64) and other black (OR 0.41, 95% CI 0.2 to 0.87) ethnic groups were less likely to accept a consultation with a general practitioner. 44% of patients preferred walk-in clinics even if waiting times for an appointment were reduced to 48 h. CONCLUSION: Delivery of sexual healthcare by nurses and general practitioners was generally found to be acceptable, although this varies by patient sex and ethnicity. Some differences exist between the preferences of a general population sample compared with clinic attenders, but overall there is a high level of concordance. Walk-in clinics remain a popular choice even when appointment waiting times are short.

Adolescent↗
PubMed1997

Evidence for recovery of spatial learning following entorhinal cortex lesions in mice.

The influence of entorhinal cortex lesions on behaviour and concommitant changes in synaptophysin immunoreactivity (IR) in the denervated dentate gyrus was assessed. Male, C57/B6 mice received either bilateral (BI), unilateral (UNI), or no lesion (SHAM) to the entorhinal cortex. At various stages post-lesion the animals were evaluated in tests to examine neurological and cognitive (spatial and cued learning, Morris water maze) function. UNI lesioned animals from 6-36 days post-lesion showed no neurological nor marked cued learning deficit, yet a profound spatial learning deficit. However by 70 days post-lesion, spatial learning ability was clearly evident. In contrast, BI lesioned animals showed severe spatial learning deficits throughout the test period (6-70 days), cued learning was also impaired. In parallel groups of UNI lesioned mice, 6-36 days post-lesion there was a marked reduction (-40%) in synaptophysin IR in the dentate gyrus molecular layer. However by 70 days post-lesion a clear increase in this measure was noted. Changes in the expression of the growth associated protein, GAP43, were also noted over this period. Taken together, the present results suggest some recovery of spatial learning following unilateral entorhinal cortex lesions in mice. This behavioural recovery of a hippocampally dependant task may be associated with a recovery of function related to the synaptic remodelling and elevation of synapse number in the denervated hippocampus, as evidenced by changes in synaptophysin and GAP43 IR.

Animals↗
PubMed1985

Effects of manno-1-deoxynojirimycin and 2,5-dihydroxymethyl-3,4-dihydroxypyrrolidine on N-linked oligosaccharide processing in intestinal epithelial cells.

The effects of manno-1-deoxynojirimycin (ManDJN) and 2,5-dihydroxymethyl-3,4-dihydroxypyrrolidine (DMDP) were compared in IEC-6 intestinal epithelial cells in culture. ManDJN caused complete inhibition of N-linked complex oligosaccharide synthesis whereas a maximum of 80% inhibition was obtained with DMDP. HPLC showed similar endo H-sensitive oligosaccharides for control and treated cells. ManDJN caused a large increase in the levels of labeled Man7-9 GlcNAc and a decrease in Man5GlcNAc. DMDP produced similar changes except that the increase in Man7-9GlcNAc was less pronounced and some increase in glucosylated oligosaccharides was observed. Since the major oligosaccharides found in DMDP-treated cells were non-glucosylated, its primary effect on complex oligosaccharide synthesis is not due to inhibition of glucosidases, in contrast to what has been reported for influenza virus-infected MDCK cells [(1984) J. Biol. Chem. 259, 12409-12413].

1-Deoxynojirimycin↗
PubMed1984

Specific inhibition of human beta-D-glucuronidase and alpha-L-iduronidase by a trihydroxy pipecolic acid of plant origin.

The glucuronic acid analogue of 1-deoxynojirimycin, 2(S)-carboxy-3(R), 4(R), 5(S)-trihydroxypiperidine, recently isolated from seeds of Baphia racemosa, is a novel specific inhibitor of human liver beta-D-glucuronidase and alpha-L-iduronidase. No other glycosidases are inhibited. The inhibition of beta-D-glucuronidase is competitive, with a Ki of 8 X 10(-5) M and is pH-dependent. This inhibitor may be useful to induce a mucopolysaccharidosis or to investigate the function of microsomal beta-D-glucuronidase.

Binding, Competitive↗
PubMed1980

Reappraisal of L-canavanine as an anti-tumour agent.

L-canavanine, an analogue of L-arginine, is known to have a toxic effect on pathogens. In experiments performed on a specialised epithelial-like cell system which is conditionally transformable, L-canavanine appeared to exhibit (1) a reversible 'static' effect on exponentially growing cells at optimal concentration, and (2) a selectively toxic effect on proliferating cells. The capacity to recognise 'tumour cells' in a heterogeneous population of cells is of potential interest in cancer chemotherapy.

Animals↗