CHOP-Like Chemotherapy Plus Rituximab Versus CHOP-Like Chemotherapy Alone in Young Patients with Good-Prognosis Diffuse Large-B-Cell Lymphoma:A Randomised Controlled Trial by the MabThera International Trial (MInT) Group

Primary Sjogren's syndrome (pSS) is a systemic autoimmune diseases of the connective tissues, characteristic of the presentation of keratoconjunctivitis sicca and xerostomia. A cardinal pathogenetic feature of SS is B-cell hyperactivity, which has invited efforts on optimal B-cell targeted therapy, whereas conventional corticosteroids and disease-modifying antirheumatic drugs (DMARDs) are restricted to symptomatic relief. As per the first EULAR recommendation for pSS patients published in 2020, regimens with monoclonal antibodies targeting B cells may be initiated in patients with severe, refractory systemic disease, notably rituximab (RTX), a mouse-derived monoclonal antibody that targets CD20 antigen and contributes to B-cell depletion. Nonetheless, the data available from clinical trials with RTX are often controversial. Despite the lack of promising results from two large RCTs, several positive clinical efficacies were demonstrated. This current review addressed the efficacy and safety of clinical trials available and elucidated the potential of RTX on the immune system, especially B and T cells. Furthermore, plausible explanations for the discrepancy in clinical data were also presented.

/pdf/rituximab-therapy-for-primary-sjogren-s-syndrome-4vx448r7sy.pdf

Rituximab Therapy for Primary Sjögren's Syndrome.

Chapter 3: Management of kidney injury caused by cancer drug therapy, from clinical practice guidelines for the management of kidney injury during anticancer drug therapy 2022.

In recent years, many antibody drugs that play an important role in the pharmacotherapy of several diseases have been developed. Antibody drugs exhibit immunogenicity in vivo leading to the development of antibodies against the antibody drug (anti-drug antibody). Nonetheless, other factors also affect the pharmacokinetics of antibody drugs. Recently, therapeutic drug monitoring (TDM) of infliximab was introduced for personalized medicine. However, the usefulness of TDM in antibody therapy remains unclear. In addition to intervention studies, real-world data analysis is important. Unlike small-molecule drugs, antibody drugs do not have a uniform molecular weight; therefore, using the conventional analysis methods, it is impossible to determine the true pharmacokinetic outcomes of these agents. To analyze structural changes of antibody drugs in the body, new technologies are necessary. In the future, along with the development of new drugs, the establishment of novel analytical methods is essential to facilitate the promotion of personalized medicine.

Therapeutic Drug Monitoring of Antibody Drugs.

In recent years, many antibody drugs that play an important role in the pharmacotherapy of several diseases have been developed. Antibody drugs exhibit immunogenicity in vivo leading to the development of antibodies against the antibody drug (anti-drug antibody). Nonetheless, other factors also aﬀect the pharma cokinetics of antibody drugs. Recently, therapeutic drug monitoring (TDM) of inﬂiximab was introduced for personalized medicine. However, the usefulness of TDM in antibody therapy remains unclear. In addition to intervention studies, real-world data analysis is important. Unlike small-molecule drugs, antibody drugs do not have a uniform molecular weight; therefore, using the conventional analysis methods, it is impossible to determine the true pharmacokinetic outcomes of these agents. To analyze structural changes of antibody drugs in the body, new technologies are necessary. In the future, along with the development of new drugs, the estab lishment of novel analytical methods is essential to facilitate the promotion of personalized medicine.

Therapeutic Drug Monitoring of Antibody Drugs Present and Future of Therapeutic Drug Monitoring in New Fields

Therapeutic antibodies have heterogeneities in their structures, although its structural alteration in the body is unclear. Here, we analyzed the change of amino acid modifications and carbohydrate chains of rituximab after administration to patients. Twenty B cell non-Hodgkin’s lymphoma patients who were treated with rituximab for the first time or after more than one year’s abstinence were recruited. Structural analysis of rituximab was carried out at 1 h after administration and at the trough by using liquid chromatography/time-of-flight-mass spectrometry. Plasma rituximab concentration and pharmacodynamic markers were also determined. Of recruited twenty, 3 patients exhibited rapid rituximab clearance. Nine types of carbohydrate chains were detected in rituximab isolated from the blood. The composition ratios in some glycoforms were significantly different between at 1 h after administration and at the trough, although consisted amino acids remained unchanged. The patients with high clearance showed extensive alterations of glycoform composition ratios. However, pharmacodynamics makers were not different. Inter-individual variations in plasma concentrations of rituximab were found in some B-NHL patients. We could analyze a change in glycoforms of rituximab in the patients, and this finding may affect the pharmacokinetics of rituximab.

/pdf/concentration-and-glycoform-of-rituximab-in-plasma-of-116q1mngx2.pdf

Concentration and Glycoform of Rituximab in Plasma of Patients with B Cell Non-Hodgkin’s Lymphoma

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Concentration and Glycoform of Rituximab in Plasma of Patients with B Cell Non-Hodgkin’s Lymphoma