PMID- 33763019 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210326 IS - 1664-2295 (Print) IS - 1664-2295 (Electronic) IS - 1664-2295 (Linking) VI - 12 DP - 2021 TI - Individualizing Therapy in CIDP: A Mini-Review Comparing the Pharmacokinetics of Ig With SCIg and IVIg. PG - 638816 LID - 10.3389/fneur.2021.638816 [doi] LID - 638816 AB - Immunoglobulin (Ig) therapy is a first-line treatment for CIDP, which can be administered intravenously (IVIg) or subcutaneously (SCIg) and is often required long term. The differences between these modes of administration and how they can affect dosing strategies and treatment optimization need to be understood. In general, the efficacy of IVIg and SCIg appear comparable in CIDP, but SCIg may offer some safety and quality of life advantages to some patients. The differences in pharmacokinetic (PK) profile and infusion regimens account for many of the differences between IVIg and SCIg. IVIg is administered as a large bolus every 3-4 weeks resulting in cyclic fluctuations in Ig concentration that have been linked to systemic adverse events (AEs) (potentially caused by high Ig levels) and end of dose "wear-off" effects (potentially caused by low Ig concentration). SCIg is administered as a smaller weekly, or twice weekly, volume resulting in near steady-state Ig levels that have been linked to continuously maintained function and reduced systemic AEs, but an increase in local reactions at the infusion site. The reduced frequency of systemic AEs observed with SCIg is likely related to the avoidance of high Ig concentrations. Some small studies in immune-mediated neuropathies have focused on serum Ig data to evaluate its potential use as a biomarker to aid clinical decision-making. Analyzing dose data may help understand how establishing and monitoring patients' Ig concentration could aid dose optimization and the transition from IVIg to SCIg therapy. CI - Copyright (c) 2021 Beydoun, Sharma, Bassam, Pulley, Shije and Kafal. FAU - Beydoun, Said R AU - Beydoun SR AD - Neuromuscular Division, Keck School of Medicine of University of Southern California (USC), Los Angeles, CA, United States. FAU - Sharma, Khema R AU - Sharma KR AD - Neurology Department, Miller School of Medicine, University of Miami, Miami, FL, United States. FAU - Bassam, Bassam A AU - Bassam BA AD - Neurology Department, University of South Alabama College of Medicine, Mobile, AL, United States. FAU - Pulley, Michael T AU - Pulley MT AD - Department of Neurology, University of Florida College of Medicine, Jacksonville, FL, United States. FAU - Shije, Jeffrey Z AU - Shije JZ AD - Department of Neurology, University of Florida College of Medicine, Jacksonville, FL, United States. FAU - Kafal, Ayman AU - Kafal A AD - CSL Behring, King of Prussia, PA, United States. LA - eng PT - Journal Article PT - Review DEP - 20210308 PL - Switzerland TA - Front Neurol JT - Frontiers in neurology JID - 101546899 PMC - PMC7982536 OTO - NOTNLM OT - CIDP OT - IG therapy OT - IVIg OT - Ig concentrations OT - SCIg OT - dosing strategies OT - pharmacokinetics OT - wear-off effect COIS- SB had received research grants from Alexion, Argenx, Catalyst, Ra Pharma, and UCB. He has also received honoraria for consulting or speaking for Akcea, Alnylam, CSL Behring, Grifols, Mitsubishi Pharma, and Takeda. BB has received honoraria for consulting or participation in advisory boards for Alexion Pharmaceuticals and CSL Behring. MP has received honoraria for consulting or participation in regional advisory boards from Alexion Pharmaceuticals, Argenx BioProducts Laboratory, Catalyst Pharmaceuticals, CSL Behring, and UCB/Ra Pharma. JS has received honoraria for consulting on an advisory board for Alnylam Pharmaceuticals. AK was a former employee of CSL Behring. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2021/03/26 06:00 MHDA- 2021/03/26 06:01 PMCR- 2021/03/08 CRDT- 2021/03/25 06:26 PHST- 2020/12/07 00:00 [received] PHST- 2021/02/10 00:00 [accepted] PHST- 2021/03/25 06:26 [entrez] PHST- 2021/03/26 06:00 [pubmed] PHST- 2021/03/26 06:01 [medline] PHST- 2021/03/08 00:00 [pmc-release] AID - 10.3389/fneur.2021.638816 [doi] PST - epublish SO - Front Neurol. 2021 Mar 8;12:638816. doi: 10.3389/fneur.2021.638816. eCollection 2021.