The Studies for Release Mechanism of the Steroids in Synthetic Poly(Amino Acid) Matrix

Poly(Amino Acid) Matrix를 이용한 스테로이드의 방출기구에 관한 연구

  • Ui-Rak Kim (Department of Chemistry, Keimyung University) ;
  • Inn-Kyu Kang (Department fo Polymer Science, Kyungpook National University) ;
  • Chong-Su Cho (Department of Polymer Engineering, Chonnam National University) ;
  • Myung Jae Lee (Department of Chemistry, Catholic Medical College) ;
  • Bong-Jin Jeong (Department fo Polymer Science, Kyungpook National University) ;
  • Kyung-Sub Min (Department fo Polymer Science, Kyungpook National University) ;
  • Mi-Ja Won (Department fo Polymer Science, Kyungpook National University)
  • 김의락 (계명대학교 자연과학대학 화학과) ;
  • 강인규 (경북대학교 공과대학 고분자공학과) ;
  • 조종수 (전남대학교 공과대학 고분자공학과) ;
  • 이명재 (가톨릭대학교 의과대학 화학과) ;
  • 정봉진 (계명대학교 자연과학대학 화학과) ;
  • 민경섭 (계명대학교 자연과학대학 화학과) ;
  • 원미자 (계명대학교 자연과학대학 화학과)
  • Published : 1993.04.20

Abstract

The release of steroids such as progesterone, testosterone, estrone and estradiol were investigated in two types of block copolymer matrices, which were AB type block copolymer composed of poly(γ-benzyl-L-glutamate)[PBLG] as the A segment and polyoxypropylene[POP] as the B segment and ABA type triblock copolymer composed of the A segment and poly(propylene glycol)[PPG] as the B segment. The release rates of progesterone, estradiol and testosterone through PBLG-POP1 and PBLG-POP2 matrices and those of progesterone, estrone and testosterone through GPG1 of ABA type triblock copolymer were higher in an acidic solution than in a basic one. However, the release rate of estrone through PBLG-POP1 and PBLG-POP2 matrices and that of estradiol through GPG1 of ABA type triblock copolymer were higher in a basic and neutral solutions than in an acidic one. The order of release rate in three different matrices was GPG1 > PBLG-POP1 > PBLG-POP2. The results also showed that the molecular weight of steroids is inversely proportional to the rate of release.

합성 polypeptide인 poly(γ-benzyl-L-glutamate)[PBLG]를 A-segment로 하고, polyoxypropylene(POP)를 B-segment로 하는 AB 형태 블록공중합체와 polypropyleneglycol을 B-segment로 하는 ABA 형태 블록공중합체를 합성한 후, 이들 공중합체의 생식 호르몬인 progesterone, estrone, estradiol, testosterone의 고분자 매트릭스를 제조하여 이들 스테로이드의 방출량의 변화를 연구하였다. PBLG-POP1와 PBLG-POP2의 매트릭스에서의 progesterone, estradiol 및 testosterone 방출속도와 ABA 형태의 GPG1 공중합체에서의 progesterone, estrone 및 testosterone 방출속도가 염기성용액보다 산성용액에서 더 빠름을 보았다. 한편 PBLG-POP1와 PBLG-POP2의 매트릭스에서의 estrone 그리고 ABA 형태의 GPG1의 매트릭스에서의 estradiol의 방출속도는 산성용액에서 보다 중성 및 염기성용액에서 더 빨랐다. 서로 다른 매트릭스에서의 방출차이는 GPG1 > PBLG-POP1 > PBLG-POP2이며, 방출속도는 스테로이드의 분자량에 반비례함을 보였다.

Keywords

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