Safety evaluation of shorter infusion for ocrelizumab in a substudy of the Phase IIIb CHORDS trial

Key characteristics of anti-CD20 monoclonal antibodies and clinical implications for multiple sclerosis treatment

The recent success of anti-CD20 monoclonal antibody therapies in the treatment of multiple sclerosis (MS) has highlighted the role of B cells in the pathogenesis of MS. In people with MS, the inflammatory characteristics of B-cell activity are elevated, leading to increased pro-inflammatory cytokine release, diminished anti-inflammatory cytokine production and an accumulation of pathogenic B cells in the cerebrospinal fluid. Rituximab, ocrelizumab, ofatumumab, ublituximab and BCD-132 are anti-CD20 therapies that are either undergoing clinical development, or have been approved, for the treatment of MS. Despite CD20 being a common target for these therapies, differences have been reported in their mechanistic, pharmacological and clinical characteristics, which may have substantial clinical implications. This narrative review explores key characteristics of these therapies. By using clinical trial data and real-world evidence, we discuss their mechanisms of action, routes of administration, efficacy (in relation to B-cell kinetics), safety, tolerability and convenience of use. Clinicians, alongside patients and their families, should consider the aspects discussed in this review as part of shared decision-making discussions to improve outcomes and health-related quality of life for people living with MS.

Fast but not furious: Rapid ocrelizumab infusion as a strategy to optimize multiple sclerosis patients' management

OBJECTIVES

Multiple sclerosis clinicians are continuously challenged to be innovative in delivering therapies and there is ongoing pressure to maximize day-hospital vacancies. We describe our single-center experience with ocrelizumab (OCR) rapid infusion (OCR-RI) in patients with MS (pwMS).

METHODS

For pwMS with prior exposure to OCR standard infusion (OCR-SI) for at least one year/two cycles, infusion time was reduced from 3.5 to 2.0 h. A comparative analysis between OCR-RI vs OCR-SI patients was conducted.

RESULTS

283 (76.7%) out of 369 OCR-treated pwMS performed OCR-RI; 86 subjects did not start OCR-RI due to infusion-related reactions (IRR) occurring with OCR-SI (n = 13) or OCR-treatment duration shorter than one year (n = 73). Disease duration was longer in OCR-RI (p < 0.001). Median numbers of overall-OCR and OCR-RI cycles were 7 (IQR = 5-8) and 4 (IQR = 2-5) (p < 0.001). Overall, 38 (10.3%) IRR were reported, 25 (8.8%) in OCR-RI and 13 (15.1%) in OCR-SI group. IRR frequency did not differ between the two groups (p = 0.106). IRR included throat irritation, rash, hypotension, fever and gastrointestinal symptoms. IRR severity was mild (81.6%) or moderate (18.4%), all resolved and did not differ in distribution between the two groups. When IRR occurred, infusions were temporarily stopped, hydration and/or symptomatic medications were given and infusions were subsequently resumed at standard velocity. OCR-RI was not a risk factor for IRR (OR 0.55, 95% CI: 0.27-1.13, p = 0.096).

CONCLUSIONS

In our cohort, IRR frequency, severity and management were comparable to literature. No severe IRR were observed. RI protocols represent a strategy to optimize patients' management in the clinic.

Comparing infusion-related reactions of the first full dose (600 mg) biosimilar ocrelizumab administration with the standard divided protocol in multiple sclerosis patients: a randomized controlled trial study

BACKGROUND

Ocrelizumab is a humanized antiCD20, thought to be a highly effective disease-modifying therapy (DMT). Its most frequent adverse effects are infusion-related reactions (IRRs). To reduce these reactions, the first dose of ocrelizumab is administered as two 300 mg infusions separated by two weeks. However, in the phase II trial of ocrelizumab, severe IRRs were not significantly different between two doses of 600 mg dose (two separate 300 mg doses) and 2000 mg dose (two separate 1000 mg doses). We compared the IRRs in undivided full (one 600 mg) and divided (two 300 mg) doses of ocrelizumab which is the standard protocol.

METHODS

MS patients (relapsing or primary progressive MS) who are selected to receive ocrelizumab by neurologist or MS fellowship were enrolled in an open-label randomized controlled trial. Iranian biosimilar of the drug (Xacrel® by Cinnagen, approved by the Iranian Food and Drug Administration in 2021) was used. The participants received the first dose of ocrelizumab as either one 600 mg dose in one session or two 300 mg doses in two weeks apart. IRRs during or in the first 24 h after infusion were recorded.

RESULTS

Of 332 participants, 150 received two 300 mg doses, and 182 received one 600 mg dose (by random selection). Life-threatening adverse effects were not observed in both groups. Overnight admission or permanent drug discontinuation was not needed. Temporary drug discontinuation was significantly higher in the one 600 mg dose group (p-value < 0.001). During the infusions, malaise (p-value: 0.003), skin reactions (p-value: 0.04), throat swelling (p-value: 0.03), and dyspnea (p-value: 0.01) were significantly increased in the intervention group. However, in the first 24 h, there was no significant difference between two different treatment protocols (one 600 mg dose or two 300 mg doses) in the onset of IRRS (p-value: 0.12).

CONCLUSION

These findings suggest one 600 mg dose of ocrelizumab administration for the first dose is relatively safe. With some protocol modifications, it could lead to fewer patient referrals, saving time and cost and improvement the access for patients.

Safety and patient experience with at-home infusion of ocrelizumab for multiple sclerosis

OBJECTIVE

This study aimed to evaluate safety (infusion-related reactions [IRRs]) and patient satisfaction (patient-reported outcomes [PROs]) for at-home ocrelizumab administration for patients with multiple sclerosis (MS).

METHODS

This open-label study included adult patients with an MS diagnosis who had completed a ≥ 600-mg ocrelizumab dose, had a patient-determined disease steps score of 0 to 6 and had completed PROs. Eligible patients received a 600-mg ocrelizumab home-based infusion over 2 h, followed by 24-h and 2-week post-infusion follow-up calls. IRRs and adverse events (AEs) were documented during infusions and follow-up calls. PROs were completed before and 2 weeks post infusion.

RESULTS

Overall, 99 of 100 expected patients were included (mean [SD] age, 42.3 [7.7] years; 72.7% female; 91.9% White). The mean (SD) infusion time was 2.5 (0.6) hours, and 75.8% of patients completed their ocrelizumab infusion between 2 to 2.5 h. The IRR incidence rate was 25.3% (95% CI: 16.7%, 33.8%)-similar to other shorter ocrelizumab infusion studies-and all AEs were mild/moderate. In total, 66.7% of patients experienced AEs, including itch, fatigue, and grogginess. Patients reported significantly increased satisfaction with the at-home infusion process and confidence in the care provided. Patients also reported a significant preference for at-home infusion compared with prior infusion center experiences.

INTERPRETATION

IRRs and AEs occurred at acceptable rates during in-home infusions of ocrelizumab over a shorter infusion time. Patients reported increased confidence and comfort with the home infusion process. Findings from this study provide evidence of the safety and feasibility of home-based ocrelizumab infusion over a shorter infusion period.