Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
권호 표지

The Effect of TGF-{\beta}_1 on Cellular Activity of Periodontal Ligament Cells activated by PDGF-BB

PDGF-BB에 의한 치주인대세포활성에 대한 TGF-{\beta}의 효과

  • Baek, Sang-Churl (Department of Periodontology, College of Dentistry Kyungpook National University) ;
  • Park, Jin-Woo (Department of Periodontology, College of Dentistry Kyungpook National University) ;
  • Suh, Jo-Young (Department of Periodontology, College of Dentistry Kyungpook National University)
  • 백상철 (경북대학교 치과대학 치주과학교실) ;
  • 박진우 (경북대학교 치과대학 치주과학교실) ;
  • 서조영 (경북대학교 치과대학 치주과학교실)
  • Published : 2002.09.30
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Abstract

The purposes of this study is to evaluate the combination effects of TGF-${\beta}_1$ and PDGF-BB on the periodontal ligament cells to use as a regeneration promoting agent of periodontal tissue. Human periodontal ligament cells were prepared from the first premolar tooth extracted for the orthodontic treatment and were cultured in DMEM/100% FBS at the $37^{\circ}C$, 5% $CO_2$ incubator. Authors measured the DNA synthesis, total protein, collagen and noncollagenous protein synthesis according to the concentration of TGF-${\beta}_1$,(1,5ng/ml) and PDGF-BB (1,10 ng/ml) in combination. To explore further this delayed effect of TGF-${\beta}_1$, we preincubated human periodontal ligament cells with TGF-${\beta}_1$ for 4 or 24 hours before PDGF-BB stimulation. The results were as follows: The DNA synthetic activity was increased dose dependently by TGF-${\beta}_1$, PDGF-BB. The combination of TGF-${\beta}_1$ and PDGF-BB consistently enhanced the DNA synthetic activity to PDGF-BB alone. The ability of TGF-${\beta}_1$ to enhance DNA synthetic activity in PDGF-BB treated periodontal ligament cells was dose dependent. The maximum mitogenic effect was at the 5ng/ml of TGF-${\beta}_1$ and l0ng/ml of PDGF-BB. Preincubation of cell with TGF-${\beta}_1$ resulted in significantly greater response to PDGF-BB at all TGF-${\beta}_1$ concentration studied, and may be useful for clinical application in periodontal regenerative procedures. The total protein, collagen and noncollagen synthesis was increased dose pendently by TGF-${\beta}_1$, PDGF-BB. The % of collagen was slightly decreased according to the concentration of TGF-${\beta}_1$, PDGF-BB. The effect of TGF-${\beta}_1$, PDGF-BB were not specific for collagen synthesis since it also increased noncollagenous protein synthesis. This study demonstrates that PDGF-BB is major mitogens for human periodontal ligament cells in vitro, and supports a role for TGF-${\beta}_1$ as a regulation of the mitogenic and total protein formation to PDGF-BB in these cells.

이 연구는 배양된 치주인대세포에 TGF(Transforming growth factor)-${\beta}_1$과 PDGF(Plateletderived growth factor)-BB를 농도별로 혼합 주입해서 세포의 증식능, 단백질 및 교원질 합성능을 측정해 봄으로서 TGF-${\beta}_1$ 이 치주인대세포의 중식과 활성에 대한 PDGF-BB의 효과를 상승시킬 수 있은지 알아보고자 본 실험을 실시하였다. 교정치료를 위해 내원한 환자로 부터 건강한 제일소구치를 발거하여 치주인대세포률 분리, 배양하여 TGF-${\beta}_1$과 PDGF-BB를 동시에 주입한 군과 TGF-${\beta}_1$를 4, 24시간 전처리 배양한 군과 나누어 실험하였다. TGF-${\beta}_1$, PDGF-BB를 주입하지 않은군을 대조군으로 하여 DNA 합성능, 총단백질과 교원질 합성능을 측정하여 다음과 같은 결과를 얻었다. 치주인대세포에 TGF-${\beta}_1$과 PDGF-BB을 동시 주입하였을 때 DNA 합성능의 효과는 대조군에 비해 모든 군에서 증가된 양상을 보였으며 1ng/ml PDGF-BB 투여군에 비해 10ng/ml PDGF-BB 투여군에서 증가 양상이 높았고 PDGF-BB 단독 투여군보다 TGF-${\beta}_1$병용 투여군에서 DNA 합성능이 증가된 양상을 나타내었으며 5ng/ml TGF-${\beta}_1$과 10ng/ml PDGF-BB 투여군에서 가장 높은 증가 양상을 보였다. TGF-${\beta}_1$ 4시간과 24시간 전처리 배양군 양군 공히 lng/ml PDGF-BB 투여군을 제외한 모든 군에서 대조군에 비해 증가된 양상을 보였으며 lng/ml PDGF-BB 투여군에 비해 10ng/ml PDGF-BB 투여군에서 증가 양상이 더 높았고 PDGF-BB 단독 투여군보다 TGF-${\beta}_1$ 전 처리군에서 DNA 합성능이 증가된 양상을 나타내 였으며 5ng/ml TGF-${\beta}_1$ 전 처리 후 10ng/ml PDGF-BB 투여군에서 가장 높은 증가 양상을 보였다. 치주인대세포에 TGF-${\beta}_1$과 PDGF-BB을 동시 주입하였을 때 총단백질합성량은 대조군에 비해 모든 군에서 증가된 양상을 보였으며 lng/ml PDGF-BB 투여군에 비해 10ng/ml PDGF-BB 투여군에서 증가 양상이 더 높게 나타났다. PDGF-BB 단독 투여군보다 TGF-${\beta}_1$ 병용 투여군에서 총단백칠 합성양이 증가된 양상을 나타내었다. TGF-${\beta}_1$ 4과 24시간 전처리 배양군의 총단백질 합성양은 대조군에 비해 모든 군에서 증가된 양상을 보였으며 1ng/ml PDGF-BB 투여군에 비해 10ng/ml PDGF-BB 투여군에서 증가 양상이 더 높았고 TGF-${\beta}_1$ 전처리 배양군이 PDGF-BB 단독 투여군보다 총단백질 합성양이 증가된 양상을 나타내었다. TGF-111과 PDGF-BB를 동시 투여하였을 때 대조군에 비해 모든 군에서 교원질 합성능이 증가하는 경향을 나타내었으며, 비교원성단백질의 합성능은 1, 10ng/ml PDGF-BB 단독투여군을 제외하고 대조군에 비해 증가하는 경향을 보였다. 총단백질에 대한 교원질 합성의 상대적 비율 PDGF-BB 단독 투여군보다 TGF-${\beta}_1$ 병용 투여군에서 감소하는 정향을 나타내었다. TGF-${\beta}_1$ 4과 24시간 전처리 배양군의 교원질과 비교원성 단백질 합성능은 대조군에 비해 모든 군에서 교원질과 비교원성 단백질 합성능이 증가하는 경향을 나타내었으며 PDGF-BB 단독 투여군보다 TGF-${\beta}_1$ 병용 투여군에서 총단백질 합성양이 증가된 양상을 나타내었으며 그 정도는 TGF-${\beta}_1$의 농도 의존적인 양상을 보였다. 총단백질에 대한 교원질 합성의 상대적비율은 TGF-${\beta}_1$ 4,24시간전처리 배양군 모두에서 대조군에 비해 감소하는 경향을 나타내었다. 이상의 결과를 종합해 볼 때 치주인대세포에서 TGF-${\beta}_1$은 PDGF-BB의 기능을 조절하는 능력을 가지고 있으며 두 성장인자 주입시 동시주입시보다 TGF-${\beta}_1$을 전처리 해 줌으로써 PDGF-BB의 반응을 더욱 촉진시킬 수 있음을 알 수 있었다.

Keywords

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