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광수준을 달리했을 때 자생식물 4종의 잎의 가스교환에 미치는 영향
남유경,곽병화 한국화훼연구회 1997 화훼연구 Vol.6 No.2
The photosynthesis(A), transpiration(E), vapor pressure deficit(Vpd), leaf temperature(T), intercellular CO2(Ci) and stomatal conductance(g) of four different endemic plants at varied light levels were investigated to assess their characteristcs. As the photosynthetic photon flux density(PPFD) increased, A of all four species increased. At low light level, Lychnis cognata showed the highest A and other three species showed increased A with increasing PPFD. Changes of I under various light levels had the similiar patterns to that of photosynthesis. Belamcanda. chineesis and Campanula. glomerata var. dahurica were mutually proportional to PPFD. However, L. cognata and Thalictrum rochebrunianum showed increased E as PPFD increased to 500 and 800μmol/m2/sec, respectively. Vpd showed sigmoid curve at varied light levels in C. glomerata var. dahurica, L. cognata and T. rochebunianum, but it is inversely proportional to light levels in B. chinensis. After the T of four species increased with increasing PPFD, it decreased above 800μmol/m2/sec except C. glomerata var. dahurica.
허혈성 심근에 관상동맥우회술과 병행한 자가 골수줄기세포 이식
유경종,김현옥,곽영란,강석민,장양수,임상현,안지영,이창영,강면식 대한흉부외과학회 2004 Journal of Chest Surgery (J Chest Surg) Vol.37 No.7
Background: Recently, autologous bone marrow cell transplantation (CTx) for angiogenesis and myogenesis in ischemic myocardium has been extensively investigated to improve heart functions. This study was designed to evaluate the effects of CTx with off-pump coronary artery bypass grafting (OPCAB) in patients who were not feasible for complete revascularization. Material and Method: Four male patients underwent CTx and OPCAB simultaneously. Bone marrow was aspirated from iliac bone. Mean 1.5×109 mononuclear cells including mean 6.7×106 CD34+ cells and 3.7×106 AC133+ cells were obtained and concentrated with 10 cc. These cells were transplanted into non-graftable ischemic myocardium after OPCAB. The heart function of all patients were evaluated using the MIBI scan, echocardiogram and MRI preoperatively. The effects of CTx was evaluated using MIBI scan and echocardiogram at 1 month postoperatively. Result: An average of 2 grafts were bypassed to left anterior descending artery territory. Other territories were transplanted with isolated mononuclear cell. All patients had uncomplicated postoperative course. After 1 month follow up, there were improvement in symptom, ejection fraction (from 49% to 55%) on echocardiogram and myocardial perfusion on MIBI scan in all patients. Conclusion: These preliminary data showed improvement of heart function and myocardial perfusion and also showed the feasibility and safety of combined therapy with OPCAB and CTx in ischemic myocardium. However, the effectiveness of CTx alone cannot be readily assessed. Further randomized, controlled studies are required to evaluate the effectiveness of CTx alone. 배경: 최근 들어 심부전증을 치료하기 위한 새로운 방법으로 골수줄기세포를 심근에 이식하여 신생혈관을 생성하거나 새로운 심근 생성을 조장하여 심장기능을 개선시키려는 노력이 활발히 진행되고 있다. 저자들은 심근경색 후 심근의 기능이 저하된 환자에서 심장박동 상태에서 관상동맥우회술 (OPCAB)과 우회술이 불가능한 부위의 골수줄기세포 이식을 동시에 시행한 연구결과를 보고하고자 한다. 대상 및 방법: 관상동맥우회술과 골수줄기세포 이식을 동시에 시행받았던 4명의 남자 환자를 대상으로 하였다. 대상 환자의 평균연령은 58세(48∼73세)로 모두 불안정성 협심증으로 심근경색의 기왕력이 있었다. 환자의 장골에서 골수를 채취한 후 단핵세포만을 분리하였으며(평균 세포 수 1.5 109개), 이 중에는 평균 6.7 106 CD34 세포와 3.7 106 AC133 세포가 포함되었다. 분리된 단핵세포는 10 cc로 농축하였다. 수술은 관상동맥우회술이 가능한 좌전하행지 부위에는 OPCAB을 시행하고, 나머지 우회로술이 불가능한 심근에는 분리한 단핵세포를 이식하였다. 이식 전 모든 환자는 심초음파, MIBI scan 및 자기공명영상(MRI)으로 심근의 기능을 검사하였다. 수술 후 1개월에 심초음파 및 MIBI scan을 시행하여 수술 전과 비교하였다. 결과: 평균 이식편수는 2개였으며, 수술 후 사망이나 부정맥 등 합병증은 없었다. 수술 후 1개월 추적검사에서 모든 환자의 증상은 호전되었으며, 심초음파상에서 좌심실 박출계수는 49%에서 55%로 개선되었고, MIBI scan에서 세포이식 부위의 현저한 관류개선이 모든 환자에서 있었다. 결론: 심장박동 상태에서 관상동맥우회술(OPCAB)과 우회술이 불가능한 부위에 골수줄기세포 이식을 동시에 시행하는 것은 안전하면서도 심장기능의 개선을 보여주었다. 그러나 심장기능의 개선이 골수줄기세포 단독의 효과라고 단정하기는 어려우며, 따라서 대조군을 이용한 연구가 이어져야 할 것으로 생각된다.
유경종,김현옥,곽영란,강석민,장양수,임상현,안지영,Ren-Ke Li 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.SUP
Recently, autologous bone marrow cell transplantation (CTx) for angiogenesis and myogenesis in ischemic myocardium has been extensively investigated to improve heart function. This study was designed to evaluate the effects of CTx with off-pump coronary artery bypass grafting (OPCAB) in patients who were not feasible for complete revascularization. Seven male patients underwent CTx combined with OPCAB in 5, CTx only in 1, and mitral valve repair in 1 patient simultaneously. Bone marrow was aspirated from iliac bone. Mean 1.5×109 mononuclear cells including mean 7.3×106 CD34+ cells and 2.4×106 AC133+ cells were obtained and concentrated with 10cc. These cells were transplanted into non-graftable ischemic myocardium. Heart function was evaluated in all patients using MIBI scan, echocardiogram and heart magnetic resonance imaging (MRI) preoperatively. The effect of CTx was evaluated using MIBI scan, echocardiogram, and MRI postoperatively. An average of 2 grafts were bypassed. Other territories were transplanted with isolated mononuclear cell. All patients had an uncomplicated postoperative course. After 2 to 7 months follow-up, there was improvement in symptom, ejection fraction (from 43% to 47%) on echocardiogram and myocardial perfusion on MIBI scan and MRI in all patients. These preliminary data showed improvement of heart function and myocardial perfusion and also showed the feasibility and safety of combined therapy with OPCAB and CTx in ischemic myocardium. However, the effectiveness of CTx alone cannot be readily assessed. Further randomized, controlled studies are required to evaluate the effectiveness of CTx alone.