Biomedical subjects

Timothy R Wilson

Publications and source records attributed to Timothy R Wilson.

4 recordsLinked to original sources

PubMed2006

Measurement of health-related quality of life in the early follow-up of colon and rectal cancer.

PURPOSE: Little is known about factors that affect health-related quality of life during the early follow-up of colorectal cancer. This study was designed to identify the factors that contribute to poor health-related quality of life after six weeks of follow-up and to compare the relative performance of instruments best suited to measure it. METHODS: A single-center, prospective study was designed to examine health-related quality of life after potentially curative surgery for colorectal cancer. Two condition-specific and two generic instruments (QLQ-C30, FACT-C, SF12 and EQ-5D) measured quality of life six weeks after discharge. Univariate and multivariate analyses were used to assess the impact of 16 treatment factors, demographic variables, and symptoms on seven global health-related quality of life scores. RESULTS: Questionnaires were obtained from 201 consecutive patients. Five factors were associated with poor health-related quality of life scores at six-week follow-up in the multivariate analysis: reduced preoperative performance status, stomas, diarrhea, constipation, and younger than aged 65 years. No instrument out performed the others. However, condition-specific instruments and those in which patients subjectively rated their overall health-related quality of life were better suited to detect health-related quality of life differences relating to the effects of colorectal cancer treatment. CONCLUSIONS: Younger patients, those with stomas, and those suffering from diarrhea or constipation are more likely to report poor health-related quality of life at six-week follow-up. The routine measurement of health-related quality of life using an instrument that includes a patient-rated scale together with condition-specific items could be used to detect patients at risk of poorer short-term health-related quality of life outcomes.

Adult↗

PubMed2005

Ileitis in ulcerative colitis: is it a backwash?

PURPOSE: This study aims to determine the incidence, demography, pathologic nature, and clinical significance of ileitis in ulcerative colitis patients who underwent restorative proctocolectomy. METHODS: A prospectively collected pouch database and the case notes of 100 consecutive patients who underwent restorative proctocolectomy for ulcerative colitis, under the care of a single surgeon, between 1988 and 2003 were reviewed. The original proctocolectomy specimens and pouch biopsies were reexamined and regraded blind, using the current diagnostic criteria. Patients were divided into two groups, those who had ileitis and those who had not. The demographic, clinical, and pathologic characteristics and the incidence of pouchitis of both groups were compared. RESULTS: Twenty-two patients had ileitis (22 percent). Compared with those with noninflamed ileum, patients with ileitis had a significantly shorter disease duration (P < 0.005), many of them presented or progressed to a fulminant state requiring acute surgical intervention (P < 0.01), had strong association with pancolitis and primary sclerosing cholangitis (P < 0.001), and had a higher incidence of subsequent development of pouchitis (P < 0.001). There was no correlation between the presence of ileitis and colitis severity. CONCLUSIONS: Ileitis in ulcerative colitis is not rare and does influence the prognosis, and the term "backw ash" is a misnomer. Ulcerative colitis with ileitis represents a distinct disease-specific subset of patients. Its true incidence and clinical significance can be determined only if detailed microscopic characterization of the terminal ileum is performed routinely in every patient with ulcerative colitis and the clinical outcome of these patients is audited prospectively.

Adolescent↗

PubMed2005

Chemotherapy and TRAIL-mediated colon cancer cell death: the roles of p53, TRAIL receptors, and c-FLIP.

Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) has recently attracted attention as a potential therapeutic agent in the treatment of cancer. We assessed the roles of p53, TRAIL receptors, and cellular Fas-associated death domain-like interleukin-1beta-converting enzyme inhibitory protein (c-FLIP) in regulating the cytotoxic effects of recombinant TRAIL (rTRAIL) alone and in combination with chemotherapy [5-fluorouracil (5-FU), oxaliplatin, and irinotecan] in a panel of colon cancer cell lines. Using clonogenic survival and flow cytometric analyses, we showed that chemotherapy sensitized p53 wild-type, mutant, and null cell lines to TRAIL-mediated apoptosis. Although chemotherapy treatment did not modulate mRNA or cell surface expression of the TRAIL receptors death receptor 4, death receptor 5, decoy receptor 1, or decoy receptor 2, it was found to down-regulate expression of the caspase-8 inhibitor, c-FLIP. Stable overexpression of the long c-FLIP splice form but not the short form was found to inhibit chemotherapy/rTRAIL-induced apoptosis. Furthermore, siRNA-mediated down-regulation of c-FLIP, particularly the long form, was found to sensitize colon cancer cells to rTRAIL-induced apoptosis. In addition, treatment of a 5-FU-resistant cell line with 5-FU down-regulated c-FLIP expression and sensitized the chemotherapy-resistant cell line to rTRAIL. We conclude that TRAIL-targeted therapies may be used to enhance conventional chemotherapy regimens in colon cancer regardless of tumor p53 status. Furthermore, inhibition of c-FLIP may be a vital accessory strategy for the optimal use of TRAIL-targeted therapies.

Apoptosis↗

PubMed2005

Maximising SHO training by inclusion of research fellows into a novel hybrid rota.

INTRODUCTION: As a result of current government legislation, junior surgical trainees are increasingly working in shift patterns. Night shifts provide few training opportunities and recent debate has focused on the most effective way of providing appropriate surgical training in the face of these working pattern restrictions. METHODS: At York Hospital, we have recently implemented a new hybrid rota in general surgery which uses research fellows to cover the majority of night-time shifts at SHO level. RESULTS & DISCUSSION: Surgical trainees have benefited by spending a much greater proportion of their time working with patients during the day where training is more continuous, better supervised and more uniform. Research fellows have benefited in being able to maintain their clinical skills whilst having sufficient free time to pursue research during the day. Extending the role of the research fellow at night to include registrar duties could also release higher surgical trainees from some night-time service commitments and allow them to benefit from more day-time training.

Education, Medical, Graduate↗