Abstract
Lisofylline (LSF) is an anti-inflammatory molecule with high aqueous solubility and rapid metabolic interconversion to its parent drug, pentoxifylline (PTX) resulting in very poor pharmacokinetic (PK) parameters, necessitating high dose and dosing frequency. In the present study, we resolved the physicochemical and pharmacokinetic limitations associated with LSF and designed its oral dosage form as a tablet for effective treatment in type 1 diabetes (T1D). Self-assembling polymeric micelles of LSF (lisofylline-linoleic acid polymeric micelles (LSF-LA PLM)) were optimized for scale-up (6 g batch size) and lyophilized followed by compression into tablets. Powder blend and tablets were evaluated as per USP. LSF-LA PLM tablet so formed was evaluated for in vitro release in simulated biological fluids (with enzymes) and for cell viability in MIN-6 cells. LSF-LA PLM in tablet formulation was further evaluated for intestinal permeability (in situ) along with LSF and LSF-LA self-assembled micelles (SM) as controls in a rat model using single-pass intestinal perfusion (SPIP) study. SPIP studies revealed 1.8-fold higher oral absorption of LSF-LA from LSF-LA PLM as compared to LSF-LA SM and ~5.9-fold higher than LSF (alone) solution. Pharmacokinetic studies of LSF-LA PLM tablet showed greater Cmax than LSF, LSF-LA, and LSF-LA PLM. Designed facile LSF-LA PLM tablet dosage form has potential for an immediate decrease in the postprandial glucose levels in patients of T1D.
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Abbreviations
- Ø :
-
Angle of repose
- AUC:
-
Area under curve
- AUMC:
-
Area under first moment curve
- CAF:
-
Central animal facility
- C max :
-
Maximum (or peak) concentration
- GIT:
-
Gastrointestinal tract
- HPLC:
-
High-performance liquid chromatography
- IAEC:
-
Institutional Animal Ethics Committee
- Ka :
-
Apparent first-order absorption rate constant
- LA:
-
Linoleic acid
- LSF:
-
Lisofylline
- LSF-LA:
-
Lisofylline-linoleic acid
- LSF-LA PLM:
-
Lisofylline-linoleic acid polymeric micelles
- LSF-LA SM:
-
Lisofylline-linoleic acid self-assembled micelles
- MCC:
-
Microcrystalline cellulose
- MIN-6:
-
Mouse insulinoma 6
- mPEG-b-P(CB-co-LA):
-
Methoxy-polyethylene-glycol-b-poly(carbonate-colactide)
- MRT:
-
Mean residence time
- MTT:
-
3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide
- PD:
-
Pharmacodynamics
- PDA:
-
Photodiode array
- PDE:
-
Phosphodiesterase
- PDI:
-
Polydispersity index
- PEG-2000:
-
Polyethylene glycol 2000
- P eff :
-
Permeability coefficient
- PK:
-
Pharmacokinetic
- PLM:
-
Polymeric micelles
- PTX:
-
Pentoxifylline
- RPMI:
-
Roswell Park Memorial Institute Medium
- SGF:
-
Simulated gastric fluid
- SIF:
-
Simulated intestinal fluid
- SPIP:
-
Single-pass intestinal perfusion
- T1:
-
Tablets without LSF-LA PLM (blank tablets)
- T2:
-
Tablets with LSF-LA PLM
- t1/2 :
-
Half-life
- T1D:
-
Type 1 diabetes
- USP:
-
United States Pharmacopeia
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Acknowledgments
The authors acknowledge Gangwal Chemicals Pvt. Ltd. (Mumbai, INDIA) for providing Fujicalin SG® as a gift sample for this work.
Funding
The work elaborated in the study was funded by SERB-DST, Govt. of India research grant #YSS/2014/000551 and DST-INSPIRE, fellowship to K.S.I. [#IF160659].
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The authors (DC and AM) are the founding directors of Nanobrid Innovations Private Limited that is involved in the development of nanotechnology-based products. They have business and/or financial interest in the operations of the company. The same could be disclosed on request. The authors declare that they have no conflict of interest pertaining to the work outlined in this study.
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Italiya, K.S., Singh, A.K., Chitkara, D. et al. Nanoparticulate tablet dosage form of lisofylline-linoleic acid conjugate for type 1 diabetes: in situ single-pass intestinal perfusion (SPIP) studies and pharmacokinetics in rat. AAPS PharmSciTech 22, 114 (2021). https://doi.org/10.1208/s12249-021-01980-5
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DOI: https://doi.org/10.1208/s12249-021-01980-5