Abstract：
AIM:Assessment of preactivated carboxymethyl cellulose as potential excipient for buccal drug delivery. METHODS:Firstly, carboxymethyl cellulose (CMC) and cysteine (SH) were covalently coupled via amide bond formation to obtain thiolated carboxymethyl cellulose (CMC-SH). Further, preactivated carboxymethyl cellulose (CMC-S-S-MNA) was obtained by preactivation with 2-mercaptonicotinic acid (MNA). Sulforhodamine 101 (SRH101) was used as a model drug for permeation study through buccal mucosa. CMC-S-S-MNA was evaluated with respect to mucoadhesive and permeation enhancing effect and cytotoxicity. RESULTS:Thiolated carboxymethyl cellulose exhibited a total amount of 112.46 ± 0.46 thiol groups. CMC-S-S-MNA exhibited around 50% of preactivated thiol groups. The preactivated polymer showed no toxic effect. Furthermore, compared to unmodified CMC, CMC-S-S-MNA revealed 3.0-fold improved mucoadhesive properties according to the rotating cylinder method and 8.8-fold enhancement in mucoadhesiveness by tensile assay, respectively. CONCLUSION:Preactivated carboxymethyl cellulose fulfills the requirements as potential excipient of being mucoadhesive and permeation enhancing for the buccal drug delivery.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Laffleur F,Bacher L,Vanicek S,Menzel C,Muhammad Idoi
10.1016/j.ijpharm.2016.01.012subject
Has Abstractpub_date
2016-03-16 00:00:00pages
120-7issue
1-2eissn
0378-5173issn
1873-3476pii
S0378-5173(16)30012-6journal_volume
500pub_type
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