• Title/Summary/Keyword: SC1

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Zanamivir Oral Delivery: Enhanced Plasma and Lung Bioavailability in Rats

  • Shanmugam, Srinivasan;Im, Ho Taek;Sohn, Young Taek;Kim, Kyung Soo;Kim, Yong-Il;Yong, Chul Soon;Kim, Jong Oh;Choi, Han-Gon;Woo, Jong Soo
    • Biomolecules & Therapeutics
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    • v.21 no.2
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    • pp.161-169
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    • 2013

  • The objective of this study was to enhance the oral bioavailability (BA) of zanamivir (ZMR) by increasing its intestinal permeability using permeation enhancers (PE). Four different classes of PEs (Labrasol$^{(R)}$, sodium cholate, sodium caprate, hydroxypropyl ${\beta}$-cyclodextrin) were investigated for their ability to enhance the permeation of ZMR across Caco-2 cell monolayers. The flux and $P_{app}$ of ZMR in the presence of sodium caprate (SC) was significantly higher than other PEs in comparison to control, and was selected for further investigation. All concentrations of SC (10-200 mM) demonstrated enhanced flux of ZMR in comparison to control. The highest flux (13 folds higher than control) was achieved for the formulation with highest SC concentration (200 mM). The relative BA of ZMR formulation containing SC (PO-SC) in plasma at a dose of 10 mg/kg following oral administration in rats was 317.65% in comparison to control formulation (PO-C). Besides, the $AUC_{0-24\;h}$ of ZMR in the lungs following oral administration of PO-SC was $125.22{\pm}27.25$ ng hr $ml^{-1}$ with a $C_{max}$ of $156.00{\pm}24.00$ ng/ml reached at $0.50{\pm}0.00$ h. But, there was no ZMR detected in the lungs following administration of control formulation (PO-C). The findings of this study indicated that the oral formulation PO-SC containing ZMR and SC was able to enhance the BA of ZMR in plasma to an appropriate amount that would make ZMR available in lungs at a concentration higher (>10 ng/ml) than the $IC_{50}$ concentration of influenza virus (0.64-7.9 ng/ml) to exert its therapeutic effect.

  • https://doi.org/10.4062/biomolther.2013.010 인용 PDF KSCI

Karyotype Analysis of Juniperus rigida Sieb. et Zucc. of Two Different Provenances in Korea (한국산(韓國産) Juniperus rigida의 두 산지(産地)의 핵형분석(核型分析))

  • Kim, Chung Suk;Chung, Woo Kyu;Ahn, Joong Kug;Jeong, Mee Jeong;Han, Chang Sook
    • Journal of Korean Society of Forest Science
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    • v.73 no.1
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    • pp.9-13
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    • 1986

  • Karyotypes are described for Juniperus rigida Sieb. et zucc, in two provenances of Gyeong-nam and Choong-puk. Chromosome numbers of two provenances, are 2n=22. The most common feature of mitotic chromosomes was shown at the chromosome 7, which has secondary constriction on the short arm. And the most differential chromosome was shown at chromosome 9 from Gyeong-nam and chromosome 5 from Choong-puk provenance which bore secondary constriction. The karyotype formulae are as follows; Gyeong-nam, Jinyang provenance race is $$K(2n)=22=2A^m+2B^m+2C^m+2D^{sm}+2E^{st}+2F^m+2^{sc}G^m+2H^m+2^{sc}I^t+2J^{st}+2K^m$$ Choong-puk, Jechun provenance race is $$K(2n)=22=2A^m+2B^m+2C^m+2D^{st}+2^{sc}E^{sm}+2F^m+2^{sc}G^m+2H^m+2I^m+2J^{st}+2K^{sm}$$.

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