This is a single-center prospective single arm study. The purpose of this study is to assess the usefulness of skin test as a diagnostic tool to predict the hypersensitivity to rituximab in Chinese population, evaluate the rate of hypersensitivity reactions (HSRs) after the application of active desensitization therapy in the case of a positive skin test result, and investigate the mechanism of HSRs to rituximab.
Patients with B-cell lymphomas who need the administration of rituximab are recruited. They undergo skin tests with rituximab before the first infusion of this medicine. In the case of a positive skin test result, the patient will receive the desensitization procedure; if the result of skin test is negative, the challenge test will be administered. Drug challenge test consists in administering the desired full dose of rituximab according to manufacturer instructions. Challenge is considered positive when it shows an objective HSR. The patient with a positive challenge test will receive the desensitization procedure; while the patient with a negative challenge test will be given standard rituximab infusion in the subsequent chemotherapies. Peripheral blood will be drawn from all the subjects during their initial infusion of rituximab. If the patient shows hypersensitive symptoms, the blood will be drawn one hour after the onset of reaction; while if the patient has no HSR in the whole infusion process, the blood will be drawn at the end of infusion and used as negative control. Levels of tryptase, specific immunoglobulin E to rituximab, IL-6, IL-8, and TNF-α in the serum will be tested.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
30
For skin prick tests (SPT), rituximab solution of 1mg/ml was applied on the volar aspect of the forearm. For intradermal tests (IDT), 0.02 mL of a 1:100 dilution (0.1mg/ml) of full-strength solution (10mg/ml) was injected first. If the result was negative, a 1:10 dilution（1mg/ml）was then used. As to the desensitization protocol, three solutions with different concentrations are delivered in 12 consecutive steps, each step increasing the rate of drug administration by 2- to 2.5-fold. Solution 1 is a 100-fold dilution (0.01mg/ml) of the final target concentration, solution 2 is a 10-fold dilution (0.1mg/ml) of the final target concentration, and the concentration of solution 3 is the target concentration (1mg/ml). Each step takes 15 minutes until the target rate of 200ml/h is reached, and the final step is prolonged to complete the target dose. The whole procedure takes about 5.5 hours.
Peking Union Medical College Hospital
Beijing, Beijing Municipality, China
RECRUITINGPredictive value of skin test
The sensitivity and specificity of skin test in the prediction of HSR to rituximab.
Time frame: From date of signing the informed consent until the end of induction chemotherapy, up to 32 weeks
Hypersensitivity reactions (HSRs)
The rate of HSRs in all the enrolled subjects with the application of active desensitization therapy in the case of a positive skin test result.
Time frame: From date of signing the informed consent until the end of induction chemotherapy, up to 32 weeks
Tryptase
Level of serum tryptase
Time frame: From date of signing the informed consent until the end of induction chemotherapy, up to 32 weeks
Specific immunoglobulin E to rituximab
Level of serum specific immunoglobulin E to rituximab
Time frame: From date of signing the informed consent until the end of induction chemotherapy, up to 32 weeks
IL-6
Level of serum IL-6
Time frame: From date of signing the informed consent until the end of induction chemotherapy, up to 32 weeks
IL-8
Level of serum IL-8
Time frame: From date of signing the informed consent until the end of induction chemotherapy, up to 32 weeks
TNF-α
Level of serum TNF-α
Time frame: From date of signing the informed consent until the end of induction chemotherapy, up to 32 weeks
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