Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

Partnerzy

Mahmood Ahmad


Ostatnie publikacje
1.  Ahmad U., Sohail M., Ahmad M., Minhas Muhammad U., Khan S., Hussain Z., Kousar M., Mohsin S., Abbasi M., Shah Syed A., Rashid H., Chitosan based thermosensitive injectable hydrogels for controlled delivery of loxoprofen: development, characterization and in-vivo evaluation, International Journal of Biological Macromolecules, ISSN: 0141-8130, DOI: 10.1016/j.ijbiomac.2019.02.031, Vol.129, pp.233-245, 2019

Streszczenie:
Oral drug delivery is natural, most acceptable and desirable route for nearly all drugs, but many drugs like NSAIDs when delivered by this route cause gastrointestinal irritation, gastric bleeding, ulcers, and many undesirable effects which limits their usage by oral delivery. Moreover, it is almost impossible to control the release of a drug in a targeted location in body. We developed thermo-responsive chitosan-co-poly(N-isopropyl-acrylamide) injectable hydrogel as an alternative for the gastro-protective and controlled delivery of loxoprofen sodium as a model drug. A free radical polymerization technique was used to synthesize thermo-responsive hydrogel by cross-linking chitosan HCl with NIPAAM using glutaraldehyde as cross-linker. Confirmation of crosslinked hydrogel structure was done by Fourier transform infrared spectra (FTIR). The thermal stability of hydrogel was confirmed through thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The scanning electron microscopy (SEM) was performed to evaluate the structural morphology of cross-linked hydrogel. To evaluate the rheological behavior of hydrogel with increasing temperature, rheological study was performed. Swelling and in vitro drug release studies were carried out under various temperature and pH conditions. The swelling study revealed that maximum swelling was observed at low pH (pH 1.2) and low temperature (25 °C) compared to the high range of pH and temperature and it resulted in quick release of the drug. The high range of pH (7.4) and temperature (37 °C) however caused controlled release of the drug. The in vivo evaluation of the developed hydrogel in rabbits demonstrated the controlled release behavior of fabricated system.

Słowa kluczowe:
Thermosensitive hydrogels, Chitosan, NIPAAM, In vivo study, Biomaterials

Afiliacje autorów:
Ahmad U. - inna afiliacja
Sohail M. - inna afiliacja
Ahmad M. - inna afiliacja
Minhas Muhammad U. - inna afiliacja
Khan S. - inna afiliacja
Hussain Z. - inna afiliacja
Kousar M. - inna afiliacja
Mohsin S. - inna afiliacja
Abbasi M. - inna afiliacja
Shah Syed A. - inna afiliacja
Rashid H. - inna afiliacja

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