Примери за използване на Daclizumab beta на Английски и техните преводи на Български
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The active substance in Zinbryta is daclizumab beta.
Daclizumab beta has not been studied in patients with renal impairment.
Carcinogenicity studies with daclizumab beta have not been conducted.
Daclizumab beta is produced in a mammalian cell line(NS0) by recombinant DNA technology.
The exact metabolic pathway for daclizumab beta has not been characterised.
Daclizumab beta is hypothesized to exert its activity in MS through immunomodulatory mechanisms.
It was acknowledged that the mechanism of action of daclizumab beta is complex.
Daclizumab beta binds to the alpha-subunit(CD25) of the high-affinity interleukin-2(IL-2) receptor.
The causal relationship between daclizumab beta and sarcoidosis is considered possible.
There was limited exposure in patients over 55 years of age in clinical studies with daclizumab beta.
Elimination As an IgG1 monoclonal antibody, daclizumab beta is not expected to undergo renal elimination.
Daclizumab beta clearance in patients who developed neutralising antibodies was, on average, 19% higher(see section 4.8 Immunogenicity).
This small volume of distribution indicates that daclizumab beta is primarily confined to the vascular and interstitial spaces.
Daclizumab beta is not expected to undergo renal elimination or metabolism by hepatic enzymes(see section 4.2).
No studies were conducted to evaluate daclizumab beta pharmacokinetics in patients with renal or hepatic impairment.
Daclizumab beta is not expected to undergo metabolism by hepatic enzymes such as CYP isoenzymes(see section 4.5).
Overall, 12 cases of encephalitis orencephalopathy in patients treated with daclizumab beta for multiple sclerosis have been identified.
Daclizumab beta is a humanised IgG1 monoclonal antibody that binds to CD25(IL-2Rα), and prevents IL-2 binding to CD25.
Available toxicology data in lactating cynomolgus monkeys have shown excretion of daclizumab beta in milk(for details see section 5.3).
Following subcutaneous administration of daclizumab beta, the median time to reach maximum serum concentrations(Tmax) ranged from 5 to 7 days.
Preclinical safety studies were conducted in cynomolgus monkeys due to species specificity of daclizumab beta binding only to human or primate CD25.
As an IgG1 monoclonal antibody, daclizumab beta is expected to undergo catabolism to peptides and amino acids in the same manner as endogenous IgG.
There is a plausible mechanism of action for the development of this colitis due to immunomodulatory properties of daclizumab beta and involvement of daclizumab beta in the origin of other immune-mediated events.
Following subcutaneous administration of daclizumab beta 150 mg every 4 weeks, steady-state serum daclizumab beta concentrations were achieved by the 4th dose and daclizumab beta accumulated to a level approximately 2.5-fold compared to a single dose.
There is also a plausible mechanism of action for the development of sarcoidosis due to the immunomodulatory effects of daclizumab beta and involvement of daclizumab beta in the origin of other immune-mediated events.
At steady state, daclizumab beta mean maximum serum concentration(Cmax), minimum serum concentration(Cmin) and area under the serum concentration-time curve over the dosing interval(AUCtau) values were approximately 30 micrograms/mL, 15 micrograms/mL and 640 day*micrograms/mL, respectively, with inter-patient variability(% CV) of approximately 40%.
In vitro investigative studies suggest that microglial aggregates are not due to a direct effect of daclizumab beta on microglial cells but are likely to be attributable to an increase in local IL-2 bioavailability.
Within the studied regimens of daclizumab beta 150 mg and 300 mg administered subcutaneous every 4 weeks in MS patients, there was no clear relationship between daclizumab beta exposure and clinical efficacy endpoints(ARR, T2 lesions and Gd-enhancing lesions) or safety endpoints of interest(serious infection status, moderate or severe cutaneous adverse reaction, and AST/ALT> 5 times the ULN).
Consistent with results from individual studies, a cross-study population pharmacokinetic analysis indicated that daclizumab beta exposure is more than dose-proportional in the 50 mg to 100 mg subcutaneous dose range and is dose proportional in the 100 mg to 300 mg subcutaneous dose range.
Based on the cross-study population pharmacokinetic analysis, daclizumab beta pharmacokinetics were not influenced by age(range: 18 to 66 years; n=1670) or gender(n= 567 males and 1103 females).