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Jones NT, Keller CL, Abadie RB, Bratton MB, Henderson EJ, Moore P, Rieger R, Ahmadzadeh S, Tirumala S, Varrassi G, Shekoohi S, Kaye AD. Safety and Effectiveness of Tofacitinib in Treating Polyarticular Course Juvenile Idiopathic Arthritis. Cureus 2023; 15:e48258. [PMID: 38054155 PMCID: PMC10695000 DOI: 10.7759/cureus.48258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 11/04/2023] [Indexed: 12/07/2023] Open
Abstract
Polyarticular course juvenile idiopathic arthritis (pcJIA) is a form of arthritis that affects at least five joints at a time and presents before the age of 16. Its most common symptoms are pain, swelling, redness, and a limited range of motion, making it incredibly difficult for patients diagnosed to function in daily life. Historically, the leading treatment options have consisted of non-steroidal anti-inflammatory drugs (NSAIDs) and disease-modifying antirheumatic drugs (DMARDs) such as methotrexate. However, these drugs have serious toxic side effects associated with long-term use in addition to being ineffective in refractory cases. Recently, small molecule biologics have emerged as an alternate treatment to pcJIA. Tofacitinib is a small molecule JAK inhibitor that blocks the JAK/STAT cascade and decreases the transcription of genes responsible for immune function. We conducted a risk-benefit analysis to determine the viability of tofacitinib as a treatment for pcJIA. In our review, we found the side effect profile of tofacitinib to be relatively mild, with many of the serious adverse side effects occurring in those immunocompromised and those with impaired renal and hepatic metabolism. Overall, we have determined that tofacitinib has the potential to be effective in reducing flare-ups and lowering erythrocyte sedimentation rate (ESR) in immunocompetent patients with pcJIA. Additionally, our review has found that tofacitinib has the potential to be effective in patients who are refractory to traditional treatment. However, large-scale clinical trials are needed to determine if this effect holds true in younger pediatric populations, as limited data surrounds this demographic.
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Affiliation(s)
- Nicholas T Jones
- School of Medicine, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Camryn L Keller
- School of Medicine, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Raegan B Abadie
- School of Medicine, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Matthew B Bratton
- School of Medicine, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Emmilee J Henderson
- School of Medicine, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Peyton Moore
- Anesthesiology, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Ross Rieger
- Anesthesiology, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Shahab Ahmadzadeh
- Anesthesiology, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Sridhar Tirumala
- Anesthesiology, Louisiana State University Health Sciences Center, Shreveport, USA
| | | | - Sahar Shekoohi
- Anesthesiology, Louisiana State University Health Sciences Center, Shreveport, USA
| | - Alan D Kaye
- Anesthesiology, Louisiana State University Health Sciences Center, Shreveport, USA
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Lamba M, Wang R, Fletcher T, Alvey C, Kushner J, Stock TC. Extended-Release Once-Daily Formulation of Tofacitinib: Evaluation of Pharmacokinetics Compared With Immediate-Release Tofacitinib and Impact of Food. J Clin Pharmacol 2017; 56:1362-1371. [PMID: 26970526 PMCID: PMC5113768 DOI: 10.1002/jcph.734] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 03/07/2016] [Indexed: 11/28/2022]
Abstract
Tofacitinib is an oral Janus kinase inhibitor for the treatment of rheumatoid arthritis. An extended‐release (XR) formulation has been designed to provide a once‐daily (QD) dosing option to patients to achieve comparable pharmacokinetic (PK) parameters to the twice‐daily immediate‐release (IR) formulation. We conducted 2 randomized, open‐label, phase 1 studies in healthy volunteers. Study A characterized single‐dose and steady‐state PK of tofacitinib XR 11 mg QD and intended to demonstrate equivalence of exposure under single‐dose and steady‐state conditions to tofacitinib IR 5 mg twice daily. Study B assessed the effect of a high‐fat meal on the bioavailability of tofacitinib from the XR formulation. Safety and tolerability were monitored in both studies. In study A (N = 24), the XR and IR formulations achieved time to maximum plasma concentration at 4 hours and 0.5 hours postdose, respectively; terminal half‐life was 5.9 hours and 3.2 hours, respectively. Area under plasma concentration‐time curve (AUC) and maximum plasma concentration (Cmax) after single‐ and multiple‐dose administration were equivalent between the XR and IR formulations. In study B (N = 24), no difference in AUC was observed for fed vs fasted conditions. Cmax increased by 27% under the fed state. On repeat administration, negligible accumulation (<20%) of systemic exposures was observed for both formulations. Steady state was achieved within 48 hours of dosing with the XR formulation. Tofacitinib administration as an XR or IR formulation was generally well tolerated in these studies.
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