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Biomedical subjects

B Pedersen

Publications and source records attributed to B Pedersen.

259 records · Page 15Linked to original sources

A comparison of aqueous suspensions of budesonide nasal spray (128 micrograms and 256 micrograms once daily) and fluticasone propionate nasal spray (200 micrograms once daily) in the treatment of adult patients with seasonal allergic rhinitis.

The efficacy of aqueous suspensions of budesonide nasal spray and fluticasone propionate nasal spray, in the treatment of seasonal allergic rhinitis, was compared in a large, placebo-controlled, two-center study. A 1-week baseline period was followed by a 4- to 6-week treatment period during which 635 adult patients, aged 18-72 years, were randomized to receive either placebo, budesonide 128 micrograms, or 256 micrograms once daily, or fluticasone propionate, 200 micrograms once daily. Nasal and eye symptoms, overall treatment efficacy and safety assessments were made during the study period. Combined, as well as individual, nasal symptoms were significantly improved in all three active treatment groups compared with placebo therapy. Treatment with 256 micrograms/day of budesonide was found to be significantly more effective in reducing the sneezing score compared with 200 micrograms/day of fluticasone propionate. Analysis of symptom scores on days when the pollen count was greater than 10 grains/m3 revealed 256 micrograms/day of budesonide therapy to be significantly more effective in reducing combined symptom scores as well as the individual scores for sneezing and runny nose, compared with 200 micrograms/day fluticasone propionate. The higher dose of budesonide (256 micrograms/day) was also more effective than the lower dose (128 micrograms/day) in reducing sneezing scores and statistical significance was almost reached for the reduction in combined symptom and runny nose scores. Substantial or total control of symptoms was achieved by 31.4%, 85.3%, 88.4%, and 81.9% of patients receiving placebo, 128 micrograms/day of budesonide, 256 micrograms/day of budesonide, and 200 micrograms/day of fluticasone propionate, respectively. The incidence of adverse events was low in all treatment groups. In conclusion, both budesonide and fluticasone propionate treatments were effective and well-tolerated in the treatment of seasonal allergic rhinitis. However, 256 micrograms/day of budesonide tended to be more effective than 200 micrograms/day of fluticasone propionate and 128 micrograms/day of budesonide, especially when patients were exposed to a higher pollen load.

Administration, Intranasal↗

Contamination of tritiated glucose tracers.

In vivo studies of glucose turnover have been complicated by the occurrence of theoretically impossible negative numbers for endogenous glucose production and it has only very recently been proposed that this could be due to radiochemical contamination of the tracers employed. We have analyzed tritiated glucose infusates purchased over the past 2 years and have found a surprisingly high and variable degree of radiochemical contamination, which could explain the above paradox.

Drug Contamination↗

The value of provoked expectoration in obtaining sputum samples for cytologic investigation. A prospective, consecutive and controlled investigation of 134 patients.

A prospective controlled investigation in 134 consecutive outpatients compared the cytologic adequacy of sputum samples obtained by spontaneous and provoked expectoration. Inhalation of nebulized 10% sodium chloride was used for provoked expectoration. A significantly higher number of adequate samples was produced after provocation, as judged by the presence of alveolar macrophages (X2 = 5.63; p less than 0.02). The improvement in sample adequacy was limited to the nonsmokers and ex-smokers in the study. This result, together with the relatively high cost of cytologic sputum examinations, indicates that provoked expectoration should at least be applied to the collection of sputum samples from nonsmokers and ex-smokers.

Humans↗

5q-: pathogenetic importance of the common deleted region and clinical consequences of the entire deleted segment.

Partial deletion of chromosome 5q (5q-) is a frequent aberration in myelodysplasias and acute nonlymphocytic leukemias. It causes clinical and hematological symptoms termed the 5q-syndrome. Although more than 30 different 5q deletions are described, recent studies have demonstrated 5q31 as the common deleted region and have mapped a tumor suppressor (IRF-1) and a cluster of interleukin genes to 5q31. Furthermore, del(5)(q13q33) is associated with longer survival, which means that 5q segments other than 5q31 also are of importance. These data suggest that loss of the suppressor releases the malignancy, interleukin losses determine the hematology and deletion of other 5q segments affect survival.

Chromosome Aberrations↗

5q-: does longer survival of female patients explain the preponderance.

Cases with deletion of part of the long arm of chromosome 5 (5q-) and a myeloid hemopoietic disorder show a marked female preponderance. We analysed the female preponderance of 328 published cases of myelodysplastic syndromes (MDS) or acute myeloid leukemia (AML). MDS without clinical or cytogenetic progression shows by far the highest frequency in female patients. Cases with advanced MDS and/or chromosome aberrations in addition to 5q- show low to moderate preponderance. Female preponderance was found to correlate positively with relative survival: in the group with the highest frequency women survived significantly longer than men. In groups with lower preponderances the survival of the two sexes gradually converged. These data suggest that in 5q- related disorders the female preponderance is a consequence of increased female survival.

Acute Disease↗