Formulation, development and optimization of raloxifene-loaded chitosan nanoparticles for treatment of osteoporosis.
BACKGROUND
Osteoporosis (OP) is a disease of skeletal system and is associated with fragility fracture at the hip, spine and wrist. Various drugs have been used to treat OP. One of them is raloxifene hydrochloride (RLX), a second-generation selective estrogen receptor modulator (SERM) approved by the USFDA. RLX possesses only 2% absolute bioavailability (BA) by oral route due to its extensive first-pass metabolism.


OBJECTIVE
The purpose of the current research work was to develop and evaluate RLX-loaded chitosan nanoparticles (CS-NPs) for treatment of OP with enhanced BA.


METHODS
The RLX-loaded CS-NPs were prepared by gelation of CS with tripolyphosphate (TPP) by ionic cross-linking. Formulation was optimized and in vitro drug release and in vivo study were performed.


CONCLUSIONS
CS-NPs were formed by the ionic gelation method. The particle size, entrapment efficiency and loading efficiency varied from 216.65 to 1890 nm, 32.84 to 97.78% and 23.89 to 62.46%, respectively. Release kinetics showed diffusion-controlled and Fickian release pattern. In vivo study indicated higher plasma drug concentration with NPs administered intranasally as compared to drug suspension administered through oral route (p < 0.05). A significantly higher drug concentration in plasma was achieved in 10 min after nasal administration with respect to oral administration.


CONCLUSIONS
The results suggest that RLX-loaded CS-NPs have better BA and would be a promising approach for intranasal (i.n.) delivery of RLX for the treatment of OP.
a Department of Pharmaceutics, Faculty of Pharmacy , Jamia Hamdard , New Delhi , India.
Deepa
D
Saini
a Department of Pharmaceutics, Faculty of Pharmacy , Jamia Hamdard , New Delhi , India.
Mohammad
M
Fazil
a Department of Pharmaceutics, Faculty of Pharmacy , Jamia Hamdard , New Delhi , India.
Mushir M
MM
Ali
a Department of Pharmaceutics, Faculty of Pharmacy , Jamia Hamdard , New Delhi , India.
Sanjula
S
Baboota
a Department of Pharmaceutics, Faculty of Pharmacy , Jamia Hamdard , New Delhi , India.
Javed
J
Ali
D000281:Administration, Intranasal; D000284:Administration, Oral; D000818:Animals; D019540:Area Under Curve; D001682:Biological Availability; D002152:Calorimetry, Differential Scanning; D002626:Chemistry, Pharmaceutical / Q000379:methods; D048271:Chitosan / Q000737:chemistry*; D004337:Drug Carriers / Q000737:chemistry; D065546:Drug Liberation; D004355:Drug Stability; D005260:Female; D006207:Half-Life; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry*; D015663:Osteoporosis, Postmenopausal; D010316:Particle Size; D020849:Raloxifene Hydrochloride / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D051381:Rats; D017208:Rats, Wistar; D020845:Selective Estrogen Receptor Modulators / Q000008:administration & dosage* / Q000493:pharmacokinetics*
D004337:Drug Carriers; D020845:Selective Estrogen Receptor Modulators; D020849:Raloxifene Hydrochloride; D048271:Chitosan
Bioavailability enhancement; nanoparticles; optimization osteoporosis; raloxifene