KR20120104501A - Pten을 포함하는 줄기세포의 조직 재생능 강화용 조성물 - Google Patents
Pten을 포함하는 줄기세포의 조직 재생능 강화용 조성물 Download PDFInfo
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- KR20120104501A KR20120104501A KR1020120025252A KR20120025252A KR20120104501A KR 20120104501 A KR20120104501 A KR 20120104501A KR 1020120025252 A KR1020120025252 A KR 1020120025252A KR 20120025252 A KR20120025252 A KR 20120025252A KR 20120104501 A KR20120104501 A KR 20120104501A
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- stem cells
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Abstract
Description
도 2는 지방 유래 줄기세포(ASC)에서 β-갈락토시다아제 발현을 나타낸 것이다. 계대수가 증가함에 따라 β-갈락토시다아제 염색 양성 세포가 증가하는 것이 관찰되었으며, P10 부터는 pPTEN이 도입된 ASC에서 도입되지 않은 ASC에 비해 β-갈락토시다아제 발현되는 세포의 수가 두드러지게 감소하는 것이 확인되었다(A: PTEN을 도입하지 않은 대조군, B: PTEN을 도입한 군).
도 3은 계대 배양에 따른 ASC의 세포 모양 변화를 나타낸 것이다. 계대수 증가에 따라 ASC는 모양이 커지면서 납작해지고, 길게 뻗어나가는 형태 변화가 일어났다. PTEN이 도입된 ASC에서 상기의 현상이 PTEN이 도입되지 않은 ASC 보다 현저히 감소하였다. (A: PTEN을 도입하지 않은 대조군, B: PTEN을 도입한 군).
도 4는 계대 배양에 따른 ASC의 세포 크기 변화를 나타낸 것이다. 계대수 증가에 따라 ASC의 세포 크기는 증가하였으나, PTEN이 도입된 ASC는 PTEN이 도입되지 않은 ASC보다 세포 크기 증가폭이 감소되는 것이 관찰되었다(A: PTEN을 도입하지 않은 대조군, B: PTEN을 도입한 군).
도 5는 PTEN의 도입 여부에 따른, 텔로머라제 활성 변화를 나타낸 것이다.
도 6은 계대 배양에 따른 ASC 증식률 변화를 나타낸 것이다. PTEN이 도입된 ASC 집단이 PTEN이 도입되지 않은 ASC 집단보다 증식률 및 증식기간이 높음이 관찰되었다.
도 7의 (A)는 초기 계대와 후기 계대에서의 지방세포 분화 정도를 나타낸 것이다. 현미경사진은 배양된 ASC에서 오일 레드-O 염색된 지질입자를 보여주고 있다. P6의 ASC와 P12 ASC에 커다란 차이를 보인다. pPTEN을 도입한 P12 ASC에서는 도입되지 않은 P12 ASC에 비해 지방 소적들을 더 많이 가지고 있으며, pPTEN을 도입한 P12 ASC이 P6 ASC의 분화능 상태로 회복되었다(배율 : x20. 에러 바는 평균±표준편차를 나타낸다(n=4)).
(B)는 초기 계대와 후기 계대에서의 골세포 분화를 나타낸 것이다. 현미경사진은 배양된 ASC에서 칼세인에 의해 염색된 칼슘 포스페이트(calcium phosphate)를 보여주고 있다. P6의 ASC와 P12 ASC간에 커다란 차이를 보인다. pPTEN을 도입한 P12 지방 유래 줄기세포에서는 도입되지 않은 P12 지방 유래 줄기세포에 비해 칼슘 포스페이트를 더 많이 가지고 있으며, PTEN을 도입한 P12 ASC이 P6 ASC의 분화능 상태로 회복되었다(배율: x20. 평균±표준편차를 나타낸다(n=4)).
도 8은 PTEN 도입 여부, 및 계대 초기 및 후기에 따라 연골조직 생성 마커의 발현 정도를 역전사 PCR로 분석한 결과를 나타낸 것이다(P7: PTEN 7p, C7: 대조군 7p, P12: PTEN 12p, C12: 대조군 12p).
도 9는 PTEN 도입 여부, 및 계대 초기 및 후기에 따라 연골 생성 분화 유도 2주 후 콜레간 타입 Ⅱ, aggrecan 및 COMP 유전자 발현 양상을 나타낸 것이다(n=4).
도 10은 PTEN이 도입된 ASC 및 PTEN이 도입되지 않은 ASC에서, 6계대에서 11계대 동안 세포사멸 관련 단백질의 발현 변화를 나타낸 것이다(“P”는 PTEN 도입 지방 유래 줄기세포).
도 11은 PTEN이 도입되지 않은 대조군 및 PTEN을 도입한 ASC의 세포사멸 관련 단백질 양상에 대한 비교 그래프이다.
도 12(A)의 a는 강하게 상호 연결된 PLLA 섬유 3D 지지체의 SEM 영상을 나타낸 것이다. b는 시딩 후 7일째 지지체에 부착한 ASC를 나타내 것이다. 부착된 ASC는 광범위한 원형질 확장을 보였다. c는 ASC를 지지체 섬유에 시딩한 후 7일차에 헤마톡시린 및 에오신(H&E) 염색을 통하여 세포가 침투된 것을 보여준 것이다. 보라색으로 염색된 부위는 지지체위 또는 내부에 있는 세포의 핵을 나타낸다. 지지체 내의 큰 공극은 지방 유래 줄기세포로 완전히 채워져 있었다.
(B)는 두개골 결손 백서에 ASC를 포함하는 PLLA 지지체를 이식시키고 4주 후의 조직을 나타낸 것이다. 아무런 처리 없는 지지체, P6 ASC를 심은 지지체, P12 ASC를 심은 지지체, 또는 pPTEN을 유입한 P12 ASC를 심은 지지체를 이식시킨 경우 결손부위에 대한 이미지이다. 이미지는 결손 여백부분(중단 이미지)과 결손 중앙부분(하단 이미지)을 보여준다(배율: (상단) x2, (중단) x20, (하단) x40. 축약: HE, 헤마톡시린-에오신; B, 골; S, 지지체 또는 세포를 심은 지지체)
도 13은 두개골 결손 백서의 micro-CT 3D 복원 이미지를 나타낸 것이다. 두개골 결손 백서에 지지체, P6 ASC를 심은 지지체, P12 ASC를 심은 지지체, 또는 pPTEN을 유입한 P12 ASC를 심은 지지체를 이식하였을 때의 이미지이다. 실제 골(Real bone)과 결손만 된 경우(defect only)의 이미지는 대조를 위해 분석하였다.
도 14의 (A)는 pPTEN을 도입하거나 도입하지 않은 ASC의 세포막 항원에 대한 유세포 분석을 나타낸 것이다. ASC는 CD29, CD44, CD90 및 CD105에 대해서는 양성을 보이고, CD14, CD34, CD45 및 CD31에 대해서는 음성을 보였다. pPTEN을 도입하거나 하지 않은 ASC는 모두 비슷한 형질을 보였다.
(B)는 ASC의 염색체 분석을 나타낸 것이다. 인간 ASC는 배양과정에서 2배체(2n, n=23)의 특성을 유지하였다(왼쪽). pPTEN 도입한 인간 ASC도 어떠한 염색체 이상, 중기 이상, 및 심각한 염색체 전좌를 보이지 않았다(오른쪽).
Claims (14)
- PTEN 유전자 또는 PTEN을 포함하는, 줄기세포의 조직 재생능 강화용 조성물.
- 제1항에 있어서, 상기 조성물은 조직 재생 지지체 상에 분주된 줄기세포의 조직 재생능을 개선 또는 이전 계대 배양 상태로 회복시키는 것인 조성물.
- 제1항에 있어서, 상기 줄기세포는 성체 줄기세포인 것인 조성물.
- 줄기세포에 PTEN 유전자 또는 PTEN을 도입하는 단계를 포함하는, 조직 재생능이 강화된 줄기세포의 제조 방법.
- 제4항에 있어서, 상기 줄기세포는 성체 줄기세포인 것인 방법.
- 플라스미드 PTEN 및 PTD의 콘쥬게이트, 및 줄기세포를 포함하는 조직 재생용 키트.
- 제6항에 있어서, 조직 재생 지지체를 추가로 포함하는 것인 조직 재생용 키트.
- PTEN 유전자 또는 PTEN을, 체외에서(in vitro) 계대 배양된 줄기세포에 도입하는 단계를 포함하는, 줄기세포를 이전 계대 배양 상태로 회복시키는 방법.
- 제8항에 있어서, 상기 방법은 줄기세포의 계대 배양 횟수 증가에 따라 나타나는 줄기세포 내 노화 관련 β-갈락토시다아제 발현 증가, 줄기세포의 크기 증가, 줄기세포의 증식률 감소, 증식기간 감소, 텔로머라아제 활성 감소, 또는 줄기세포의 분화능 감소를 이전 계대 배양상태로 회복시키는 것인 방법.
- 제8항에 있어서, 상기 줄기세포는 성체 줄기세포인 것인 방법.
- PTEN 유전자 또는 PTEN을 포함하는, 줄기세포의 회춘 조성물(rejuvenating composition)로서,
시험관에서(in vitro) 줄기세포의 계대 배양 횟수 증가에 따라 나타나는 줄기세포 내 노화 관련 β-갈락토시다아제 발현 증가, 줄기세포의 크기 증가, 줄기세포의 증식률 감소, 증식기간 감소, 텔로머라아제 활성 감소, 또는 줄기세포의 분화능 감소로 나타나는 노화진행을 역방향으로 진행시키는 것인 조성물. - PTEN 유전자 또는 PTEN을 줄기세포에 도입하는 단계를 포함하는, 줄기세포의 노화 지연방법으로서,
상기 노화는 체외에서(in vitro) 줄기세포의 계대 배양 횟수 증가에 따라 나타나는 줄기세포 내 노화 관련 β-갈락토시다아제 발현 증가, 줄기세포의 크기 증가, 줄기세포의 증식률 감소, 증식기간 감소, 텔로머라아제 활성 감소, 또는 분화능 감소인 것인 방법. - 제12항에 있어서, 상기 줄기세포는 성체 줄기세포인 것인 방법.
- PTEN 유전자 또는 PTEN을 포함하는, 줄기세포의 노화 지연용 조성물로서,
상기 노화는 체외에서(in vitro) 줄기세포의 계대 배양 횟수 증가에 따라 나타나는 줄기세포 내 노화 관련 β-갈락토시다아제 발현 증가, 줄기세포의 크기 증가, 줄기세포의 증식률 감소, 증식기간감소, 텔로머라아제 활성 감소, 또는 분화능 감소인 조성물.
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