Flow cytometric basophil activation test: detection of CD63 expression as a useful aid to diagnosis of latex allergy.
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Biomedical subjects
Publications and source records attributed to Antonio Ferrannini.
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BACKGROUND: Etoricoxib is a novel cyclooxygenase 2 selective inhibitor. Until now, there has not been information in the literature about its tolerability in patients with a history of hypersensitivity reactions to nonsteroidal anti-inflammatory drugs (NSAIDs). OBJECTIVE: To determine the short-term tolerability of etoricoxib in patients with a history of cutaneous adverse reactions to NSAIDs. METHODS: Single-blind challenge testing was performed on 2 different days using placebo (talc) and etoricoxib. On the first day, 2 placebo capsules were administered 1 hour apart; 7 days later, each patient received divided doses of the total therapeutic dose of 90 mg of etoricoxib: 22.5 mg initially and 67.5 mg 1 hour later if no reactive symptoms were noted. RESULTS: Of 141 patients who underwent challenge testing with etoricoxib, only 2 (1.4%) had positive test results; both developed wheals on the extremities. These 2 patients were treated with chlorpheniramine maleate (10 mg intravenously), and the symptoms completely resolved within 2 hours. None of the patients experienced adverse reactions to the placebo challenge. CONCLUSION: The low rate of adverse reactions to etoricoxib, tested by oral challenge, suggests that patients with previous cutaneous hypersensitivity reactions to NSAIDs (primarily urticaria and angioedema) may tolerate this drug.
BACKGROUND: Rofecoxib is a selective cyclooxygenase 2 (COX-2) inhibitor and is well tolerated as an alternative to nonsteroidal anti-inflammatory drugs (NSAIDs) in patients with a previous adverse reaction to other classes of NSAIDs. Until now, there has not been information in the literature about its long-term tolerability. OBJECTIVE: To provide follow-up data on patients with a history of adverse cutaneous reactions to NSAIDs who underwent and tolerated a challenge test with rofecoxib. METHODS: Study patients had historically experienced cutaneous adverse reactions to aspirin and NSAIDs and had undergone single-blind challenges with rofecoxib, 25 mg. A questionnaire was distributed to all participants. In particular, they were asked to clarify any reactive symptoms they had developed after ingestion of the drug. All patients were reexamined 1 to 3 years after testing. At reexamination, they were carefully and personally interviewed using the previously distributed questionnaire. RESULTS: Of the 182 patients who participated in the study, none reacted to rofecoxib during single-blind challenges. Fifty-one (28%) never received rofecoxib again, whereas 131 (72%) were exposed to rofecoxib, often on multiple occasions. Only 7 (5%) of the 131 patients reported cutaneous reactions to rofecoxib during the 3 years of follow-up. CONCLUSIONS: Rofecoxib appears to be a safe alternative drug among atopic individuals, antibiotic-hypersensitive individuals, and individuals who experienced adverse cutaneous reactions to more than 1 class of NSAIDs, but it is less safe among chronic urticaria patients. Further investigations that include a larger sample are required to confirm our results especially among chronic urticaria patients.
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Since its introduction the safety of specific immunotherapy (SIT) was assessed by many well-designed studies. SIT is accepted as an effective treatment of allergic diseases despite the occurrence of side-effects, among which systemic reactions (SRs) are the most dangerous. The reported frequency of SRs after SIT varies among the studies and several factors influence it. Asthma is a particular risk factor for systemic side-effects. Furthermore, SRs occur more often in patients with high allergen sensitivity as determined by skin testing or RAST. Making dosage errors is also considered to be a high risk. It is reported that reactions are more common during rush and clustered induction treatment, whereas a significantly lower incidence of SRs occurred with the use of standardized modified allergen vaccines than with aqueous extracts. On the basis of valuable guidelines, precautions to minimize the risk of SRs from SIT were recommended. Injections should be given or supervised by doctors well-trained in this form of treatment in a clinic where there is the immediate availability of a resuscitative equipment. Consideration should be given to evaluate the patient's conditions and to monitor subjects for a minimum of 30 minutes after the injections. Therefore, if appropriately done, the risk of SIT is negligible.
Aseptic meningitis is a rare but well-recognized complication of drug therapy. The clinical presentation of drug-induced aseptic meningitis (DIAM) is distinct. Symptoms typically include fever, neck stiffness, headache, confusion, nausea and vomiting. The major categories of causative agents are non-steroidal anti-inflammatory drugs, antimicrobials and also intravenous immunoglobulins, monoclonal antibodies and vaccines. These drugs most commonly implicated as causes of aseptic meningitis act more likely through an immunological mechanisms. However, the exact pathogenetic mechanism of DIAM is still unknown. The diagnosis of drug-induced aseptic meningitis is difficult and infectious etiologies must be excluded. In some cases the diagnosis has been confirmed by rechallenging the patient with the suspected agent. In this case, informed written consent is necessary and rechallenge must be medically supervised both to document the response and to offer medical care and advice, if required. The outcome of DIAM is generally good, usually without long term sequelae.
BACKGROUND: Adverse reactions to nonsteroidal anti-inflammatory drugs (NSAIDs) are very common problems in clinical practice. Rofecoxib is a novel NSAID which selectively inhibits prostaglandin endoperoxide H synthase-2 and has no effect on prostaglandin endoperoxide H synthase-1. OBJECTIVE: To evaluate the tolerability of rofecoxib in NSAID-sensitive patients with cutaneous adverse reactions. PATIENTS AND METHODS: One hundred thirty-nine patients with NSAID-induced adverse reactions [60 urticaria alone (43.1%), 34 angioedema (24.5%), 34 angioedema plus urticaria (24.5%), 5 urticaria plus difficulty in breathing (3.6%), 4 maculopapular rush (2.9%), and 2 Stevens-Johnson syndrome (1.4%)] were submitted to a single-blind, placebo-controlled peroral challenge with increasing doses of rofecoxib. RESULTS: One hundred thirty-eight of 139 (99.3%) patients tolerated rofecoxib without adverse reactions; only one (0.7%) experienced weak urticaria localized at arms. CONCLUSIONS: Rofecoxib is a well tolerated drug in patients with NSAID cutaneous adverse reactions and it may represent a valid alternative drug in NSAID-sensitive patients.
Contact dermatitis is the most frequent occupational dermatosis and non-specific irritants in addition to specific Type IV sensitization are involved. We reviewed our database for data from 1994 to 1998 and selected 360 consecutive patients working in healthcare environments and experiencing contact dermatitis at their hands, wrists and forearms. We found that allergic contact dermatitis and irritant contact dermatitis were considered to be work-related in 16.5% (72/436) and 44.4% (194/436) of diagnoses, respectively. Occupational irritant contact dermatitis is due to exposure to a wide range of irritants in the workplace, such as soaps, solvents, cleansers and protective gloves, which conspire to remove the surface lipid layer and/or produce cellular damage. In this study the major relevant aetiological agents that induced occupational allergic contact dermatitis were: nickel sulphate (41 patch positivities), components of disinfectants [glutaraldehyde (5) and benzalkonium chloride (7)] and rubber chemicals [thiuram mix (15), carba mix (9) and tetramethylthiuram monosulphide (6)]. The best treatment for allergic contact dermatitis is to avoid those allergens causing the rash. Whenever this is not possible, contact with them needs to be reduced using properly selected protective gloves. Finally, subjects with atopic dermatitis should avoid 'wet work' and contact with irritants, because atopic dermatitis is significantly associated with irritant contact dermatitis.
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OBJECTIVE: The purpose of this study was to alert doctors of dental surgery to the possibility of latex sensitivity in both outpatients and inpatients. STUDY DESIGN: The study involved 2 groups: group A was composed of 21 subjects with a history of immediate reaction in dental environment; group B was composed of 24 healthy individuals. Patients underwent skin prick tests with common inhalant allergens, with latex cross-reacting foods, with a commercial extract of non-ammoniated latex, and the incremental challenge test with local anesthetics. Specific IgE to latex and to latex cross-reacting foods were measured with the fluorescent enzyme immunoassay. RESULTS: All patients in group A and none in group B were latex-allergic. Subjects who were latex-allergic were significantly more likely to be atopic and had positive IgE test to cross-reactive foods. CONCLUSIONS: Dentists and people working in a dental surgery environment must obtain detailed patient history to help identify individuals at risk of latex allergy or those actually allergic to latex. If an allergy exists, equipment used should be made of alternative materials.
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The value of recommending latex allergy screening in allergy departments of the Army's Hospital was studied. The purpose of the study was to evaluate whether atopy was a risk factor for latex sensitization in a specific population such as the young male soldiers of the Italian Army. The study was also aimed to assess the role of other risk factors. One thousand five hundred male subjects (1000 subjects who were atopic and 500 subjects who were nonatopic), visiting the Department of Allergology and Respiratory Physiopathology of the Army's Hospital in Bari, Italy, were enrolled into the study. The protocol included a questionnaire (symptoms of atopy, use of latex gloves and condoms and possible reactions previous surgical procedures), a clinical examination, a skin-prick test to latex and common allergens to evaluate atopy, and in part a latex challenge. Among the 1000 subjects who were atopic, 2.8% had evidence for sensitization to latex compared with 1.2% in the 500 subjects in the nonatopic group. The risk of latex sensitization was 19 times higher for subjects with a history of reactions to latex exposure and had a twofold increase for each surgical procedure and for each skin test positivity for inhalant allergens. Another risk factor was positivity to skin-prick tests for Artemisia vulgaris, cypress, and molds. Atopy significantly relates to an increased risk of latex sensitization. Screening is recommended in the Army's Hospital to identify latex-sensitized subjects and inform them about the risks connected with this condition.