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Biomedical subjects

A Bon

Publications and source records attributed to A Bon.

10 recordsLinked to original sources
PubMed2001

Treatment of non-malignant pain in the Dutch GP population: an analysis of treatment standards, prescription habits and basic attitudes.

The aim of this study was to evaluate whether dexibuprofen meets the basic requirements of Dutch General Practitioners (GPs) for acceptance as an analgesic in mild to moderate pain. The available GP treatment standards for mild to moderate pain were analysed. If no treatment standard was available, results from two semistructured round table group sessions were used. The available treatment standards are either diagnosis oriented (e.g. otitis media) or symptom oriented (e.g. lower backache). Prescription data (1988-2000) show that GPs usually prescribe the medication suggested by the standards. Paracetamol, diclofenac, ibuprofen and naproxen, all over 25 years old, have a combined marketshare greater than 84%. Most new drugs have been short-lived and/or little prescribed. Round tables show three basic dimensions to pain treatment: objective, subjective, and the action taken to relieve the pain. The objective dimension relates to anamnesis and physical examination to rule out serious causes. The subjective dimension relates to the doctor's assessment of the pain threshold of the patient, expectations towards the doctor, and previous action taken by the patient. The pain relief dimension relates to acceptance of the pain by the patient, the solution proposed by the doctor and the way this is presented. Medication prescribed should be exclusive for doctors. The GP must also have faith in the medication, and so previous experience is a dominant factor in the choice made. GPs are relatively insensitive to new products, as there are few unmet needs. As a new NSAID dexibuprofen meets two basic requirements. First, it is only available to doctors. Secondly, because it is a pure form of ibuprofen, doctors can relate to extensive previous experience when prescribing it. This might ensure its rapid acceptance compared to other new NSAIDs.

Anti-Inflammatory Agents, Non-Steroidal↗
PubMed1999

Inhibiteur de rejet de greffe alpha2-macroglobulin in burn injury: a suppressive activity on complement.

A subform of alpha2-macroglobulin, (inhibiteur de rejet de greffe (IRG), present at a low rate in healthy rat, increased with rate-related suppressive activity on complement during inflammatory processes. In human serum, a molecule with such properties was described. Serum and blister IRG from burn patients belonging to a selected population was purified under gentle conditions. Serum IRG increased quickly within the first day after hospitalization and continued to increase until day 6. Although absent in whole serum, the rate-related activity of IRG varied according to the surface area and the degree of burns. A rate-related activity was also revealed in whole blister fluid and in purified blister IRG. We report a new site and a new suppressive activity of IRG in its native form from serum and blister fluid during inflammatory processes of burned patients. The suppressive activity of IRG on complement is discussed, and it appears to play a role in the development of inflammatory processes.

Adolescent↗
PubMed1996

Evidence for genetic heterogeneity in monilethrix.

Monilethrix is a rare inherited defect of the hair shaft resulting in hair fragility and dystrophic alopecia. In contrast to recent reports mapping monilethrix to the type II epithelial and trichocyte keratin gene cluster on 12q13, we strongly excluded these candidate genes in another family with autosomal dominant monilethrix. Moreover, there was no evidence for linkage of the disease to the keratin gene cluster on chromosome 17q12-q21, thus excluding defects in all known trichocyte and epithelial keratins as the cause of monilethrix in this family. Likewise, several other genes known to play an important role in hair shaft formation (trichohyalin and involucrin, ultra-high sulfur matrix proteins, and transglutaminases 1, 2, and 3) did not provide any evidence for linkage. Our results indicate genetic heterogeneity in monilethrix and suggest that aberrations in at least one other gene result in a similar phenotype.

Age Factors↗
PubMed1995

Mutations of keratinocyte transglutaminase in lamellar ichthyosis.

Lamellar ichthyosis is a severe congenital skin disorder characterized by generalized large scales and variable redness. Affected individuals in three families exhibited drastically reduced keratinocyte transglutaminase (TGK) activity. In two of these families, expression of TGK transcripts was diminished or abnormal and no TGK protein was detected. Homozygous or compound heterozygous mutations of the TGK gene were identified in all families. These data suggest that defects in TGK cause lamellar ichthyosis and that intact cross-linkage of cornified cell envelopes is required for epidermal tissue homeostasis.

Base Sequence↗
PubMed1993

Serious long-term complication following silicone injection of the face.

Following liquid silicone injections of the face, a 48-year-old patient developed a more and more serious painful swelling during a period of 3 years. The diagnosis of a local long-term complication after silicone injection could be established. There were no signs of a systemic complication.

Edema↗
PubMed1992

Focal epithelial hyperplasia.

In 2 children (brother and sister) focal epithelial hyperplasia could be diagnosed by means of histology, human papillomavirus typing and Southern blot. In the 14-year-old girl the history could be followed over many years. The high familial incidence and the special geographic distribution of focal epithelial hyperplasia are pointed out.

Adolescent↗
PubMed1991

Evidence for an alpha 2-macroglobulin with complement-inhibiting activity in rat serum.

alpha 2-Macroglobulin (alpha 2M) was purified both from the serum of male rats developing an acute turpentine-induced inflammatory reaction where its concentration is greatly increased (3-4 mg/ml) and from the serum of healthy males where it is present at low levels (15-30 micrograms/ml). A three-step purification procedure involving gel filtration, anion exchange chromatography on DEAE cellulose and negative immunoaffinity was used. A pure native alpha 2M, as assessed by biochemical and immunological tests, was obtained. This alpha 2M differed from other subforms in terms of its electric charge and its complement-inhibiting activity in a complement-dependent immune haemolysis test. Moreover, this inhibitory activity was not affected by complexing with trypsin or modification by interaction with methylamine showing that this newly described property is not linked to the well known antiproteinase function of alpha 2M.

Acute-Phase Reaction↗
PubMed1990

Characterization of one alpha 2-macroglobulin with anticomplementary activity from pregnant women.

In 15 pregnant women during the third term of pregnancy, the immunomodulatory property of alpha 2-macroglobulin (alpha 2M) was initially detected by measuring the inhibitory effect on immune complement-dependent haemolysis of serum alpha 2M fractions obtained by gel filtration. By a two-step chromatography procedure consisting of gel filtration followed by anion-exchange chromatography, different sub-forms of alpha 2M in serum were separated. Amongst them, it was shown that the inhibition of complement activity was almost exclusively linked to one particular subform. Additional studies revealed that the observed effect was not due to proteases bound to alpha 2M during clotting since, by using protease-specific inhibitors, no change was observed in complement inhibition. This subform, though present at very low levels in control sera, appeared in strikingly increased amounts during the third trimester of pregnancy (35 mg/l) and comprised between 3 and 5% of the total alpha 2M. Results show that the increase of alpha 2M anticomplementary activity is linked to the increase in alpha 2M levels in serum.

Chromatography, Gel↗