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J V Basson 《British medical journal (Clinical research ed.)》1986,292(6524):847-848
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A blocking ELISA was developed to confirm the specificity of screening tests for anti-HIV-1 antibodies. A murine monoclonal antibody (McAb) raised against recombinant gp160 was used in combination with a commercial technique (ELA-VIA-1). After determining the optimal experimental conditions, the assay was applied to 92 samples presenting different reactivities by Western blot (WB) analysis. All the sera containing antibodies to gp160/gp120 (53) were positive in our assay. The six patients who sero converted showed a low positivity by ELAVIA-1 (optical density near the cutoff value) reacted by blocking-ELAVIA-1 with an McAb binding inhibition greater than 85%. By contrast, negative samples (29) and specimens that exhibited reactivity only against gag-proteins (10) were not detected (McAb binding inhibition smaller than 15%). This sensitive and specific blocking-ELAVIA-1 represents a convenient alternative to WB as a confirmatory test. The technique is time-saving and inexpensive and can easily be integrated with a screening test for diagnostic or epidemiologic studies on HIV-1 infection. 相似文献
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C.F. Heyns J. van der Merwe J. Basson A. van der Merwe 《The African Journal of Urology》2012,18(1):4-9
ObjectiveTo evaluate temporal changes in male urethral stricture etiology and socio-demographic features by comparing a contemporary with a previously studied cohort.Patients and methodsA total of 125 men with proven urethral strictures were interviewed April 2007 through March 2008 using a structured questionnaire on demographic, socio-economic and clinical aspects. The findings were compared with those reported in 120 urethral stricture patients seen at the same institution during 1991. Statistical analysis was performed using analysis of variance (ANOVA) and Fisher's exact tests (p < 0.05 = statistically significant). The protocol was approved by the local ethics committee.ResultsCompared to the 1991 cohort, the current cohort had a significantly greater proportion with >6 years of schooling (77.5% vs 45.8%), mean number of sex partners (7.3 vs 4.6) and illegal drug use (20.8% vs 10%). Stricture etiology showed a decrease in urethritis (25.6% vs 45%) and external trauma (16.8% vs 28.3%) and an increase in internal (iatrogenic) trauma (36.8% vs 10%). The groups with urethritis and external trauma were significantly younger (mean age 46.1 and 36.3 years) than those with iatrogenic trauma or idiopathic etiology (55.5 and 53.8 years, respectively). Urethritis etiology was associated with a greater number of sex partners, lower education level, previous imprisonment, and illegal drug use.ConclusionsOver the past 15 years there was an increase in education levels, illegal drug usage and number of sex partners in men with urethral strictures. There was a decrease in urethritis and external trauma, and an increase in iatrogenic trauma as stricture etiology. 相似文献
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Phiwayinkosi V Dludla Sihle E Mabhida Khanyisani Ziqubu Bongani B Nkambule Sithandiwe E Mazibuko-Mbeje Sidney Hanser Albert Kotze Basson Carmen Pheiffer Andre Pascal Kengne 《World journal of diabetes》2023,14(3):130-146
Insulin resistance and pancreatic β-cell dysfunction are major pathological mechanisms implicated in the development and progression of type 2 diabetes(T2D). Beyond the detrimental effects of insulin resistance, inflammation and oxidative stress have emerged as critical features of T2D that define β-cell dysfunction. Predominant markers of inflammation such as C-reactive protein, tumor necrosis factor alpha, and interleukin-1β are consistently associated with β-cell failure in preclinical models... 相似文献
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Physical forces like deformation and pressure modulate signaling and phenotype in cultured cells. However, it is more difficult to establish that such phenomena occur in vivo. We studied the effects of 0 to 10 minutes of rhythmic distension with an isotonic electrolyte and polyethylene glycol solution to 30 cm H(2)O pressure on defunctionalized small and large bowel segments in adult male Sprague Dawley rats. Mucosa was harvested at 0, 1, and 10 minutes and assayed for tyrosine kinase activity. Rhythmic distension caused a time-dependent increase in colonic mucosal tyrosine kinase activity, which was statistically significant at 10 minutes (140% +/- 41% increase, n = 5, P <.05). Small bowel tyrosine kinase activity was markedly lower than that observed in the colon, but achieved a statistically significant increase at 5 minutes after initiation of rhythmic distension. (115% +/- 44% increase, n = 5, P <.05). 相似文献
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Razvan C. Opreanu Justin Sobinsky Marc D. Basson 《Journal of gastrointestinal surgery》2013,17(3):609-610
Introduction
Appendiceal mucocele is most commonly encountered incidentally during appendectomy.Methods
We report a case of large bowel obstruction presenting as a closed loop with an appendiceal mucocele as the lead point, superimposed on a chronic ileal stricture that had been misdiagnosed as irritable bowel syndrome.Results
The patient underwent ileocecal resection and primary anastomosis. She did well postoperatively, and her irritable bowel syndrome disappeared.Conclusions
Appendiceal mucocele can present in a variety of ways, and surgeons should be alert for atypical presentations. Moreover, some patients with intermittent abdominal pain deserve anatomic investigation before being dismissed as having irritable bowel. 相似文献10.