• 제목/요약/키워드: autologous cell transplantation

검색결과 52건 처리시간 0.035초

Upregulation of miR-23b Enhances the Autologous Therapeutic Potential for Degenerative Arthritis by Targeting PRKACB in Synovial Fluid-Derived Mesenchymal Stem Cells from Patients

  • Ham, Onju;Lee, Chang Youn;Song, Byeong-Wook;Lee, Se-Yeon;Kim, Ran;Park, Jun-Hee;Lee, Jiyun;Seo, Hyang-Hee;Lee, Chae Yoon;Chung, Yong-An;Maeng, Lee-So;Lee, Min Young;Kim, Jongmin;Hwang, Jihwan;Woo, Dong Kyun;Chang, Woochul
    • Molecules and Cells
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    • 제37권6호
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    • pp.449-456
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    • 2014
  • The use of synovial fluid-derived mesenchymal stem cells (SFMSCs) obtained from patients with degenerative arthropathy may serve as an alternative therapeutic strategy in osteoarthritis (OA) and rheumatoid arthritis (RA). For treatment of OA and RA patients, autologous transplantation of differentiated MSCs has several beneficial effects for cartilage regeneration including immunomodulatory activity. In this study, we induced chondrogenic differentiation of SFMSCs by inhibiting protein kinase A (PKA) with a small molecule and microRNA (miRNA). Chondrogenic differentiation was confirmed by PCR and immunocytochemistry using probes specific for aggrecan, the major cartilaginous proteoglycan gene. Absorbance of alcian blue stain to detect chondrogenic differentiation was increased in H-89 and/or miRNA-23b-transfected cells. Furthermore, expression of matrix metalloproteinase (MMP)-9 and MMP-2 was decreased in treated1 cells. Therefore, differentiation of SFMSCs into chondrocytes through inhibition of PKA signaling may be a therapeutic option for OA or RA patients.

신경모세포종: 20년 치료 경험의 분석 (Neuroblastoma: Review of 20-year Experiences)

  • 문석배;이성철;박귀원;정성은
    • Advances in pediatric surgery
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    • 제15권1호
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    • pp.27-37
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    • 2009
  • Neuroblastoma is the most common extracranial solid tumor in children. We retrospectively analyzed the results of neuroblastoma treatment of 191 patients (116 males and 75 females) treated between January 1986 and December 2005 at the Department of Pediatric Surgery and the Department of Pediatrics, Seoul National University Children's Hospital. The mean age at diagnosis was 3.1 years (0.1 yrs - 13.5 yrs). Forty-seven patients were under 1 year of age. The mean follow-up period was 57.3 months (24 days - 19.1 yrs). Patients were classified into two groups according to the completeness of resection of the primary tumor; (1) gross total resection (GTR) and (2) incomplete resection (IR). The number of patients in stages I, II, III, IV, IV-S were 17 (8.9 %), 12 (6.3 %), 43 (22.5 %), 114 (59.7 %), 4 (2.1 %), respectively. GTR was achieved in 120 patients and IR in 71 (22 stage III, 47 stage IV, 1 stage IV-S, 1 brain). Overall survival (OS) was 65.2 % and event-free survival (EFS) was 48.6 %. EFS were 100 %, 75 %, 66.8 %, 31.3 %, 75 % at stage I, II, III, IV, IV-S, respectively. There was no significant difference in EFS according to the completeness of resection. EFS was improved in GTR group (p=ns) of stage III, but by contrast, stage IV patients showed worse EFS in GTR group. EFS was improved significantly after the introduction of autologous stem cell transplantation (ASCT) (58.1% vs. 40.6%, p=.029). The EFS improved significantly after the introduction of ASCT in IR group (p=.009) rather than GTR group (p=ns). The EFS of the patients under 1 year of age (N=47) was better than the patients over 1 year of age (N=144) significantly (75.5 % vs. 39.4 %, p=.0034). The prognosis of neuroblastoma was related to the INSS stage and age at diagnosis. The survival of IR group significantly improved after ASCT.

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허혈성 심혈관 질환의 치료제로서 혈관내피전구세포(EPC)의 가능성에 대한 고찰 (The Potential Therapeutic Effects of Endothelial Progenitor Cells in Ischemic Cardiovascular Disease)

  • 김다연;김보민;김소정;최진희;권상모
    • 생명과학회지
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    • 제30권7호
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    • pp.651-659
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    • 2020
  • 허혈성 심혈관질환은 전 세계적으로 치사율이 높은 질병 중 하나이다. 이를 치료하기 위해 수술적 방법이 시행되고 있으나, 손상된 심근조직 회복의 어려움과 수술 후 부작용의 한계가 남아있다. 이러한 한계점을 극복하기 위해, 최근 줄기세포를 기반으로 한 심혈관질환의 세포치료제가 각광받고 있는데 그 중에서도 특히 혈관내피전구세포(EPC)는 높은 증식능과 분화능을 기반으로 손상된 혈관을 재생하고, 주변 조직의 재생을 돕는다는 장점이 있다. 또, EPC는 임상적으로 안전하며, 환자의 심근 기능을 회복시켜주기에 잠재적인 심혈관질환 치료제로서의 가능성이 대두되었다. 하지만, 환자 유래 EPC를 이용한 치료법은, 고령, 흡연 여부, 기저질환 등의 이유로 환자의 EPC 기능이 저하되어 있어, 그 치료 효능을 기대하기 어렵다. 따라서, 최근에는 세포 프라이밍 기법, 오가노이드 배양법과 같이 EPC의 생리학적 활성도를 올리는 체외 배양법의 개발과 3D 바이오프린팅 기법을 이용한 EPC의 이식 효율을 높여 치료 효능을 개선시킬 수 있는 새로운 접근법이 연구되고 있다. 본 연구에서는 EPC의 특징과 세포치료제로서의 임상적용 가능성에 대해 살펴보고자 한다.

세포배양삽입체계(Cell Culture Insert System)에서 중간엽 줄기세포(Mesenchymal Stem Cell)가 수지상세포(Dendritic Cell)의 활성화에 미치는 영향 (The Effect of Mesenchymal Stem Cells on the Activation of Dendritic Cells in the Cell Culture Insert System)

  • 김기원;박석영;이경복;김현수
    • IMMUNE NETWORK
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    • 제4권2호
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    • pp.88-93
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    • 2004
  • Background: Bone marrow mesenchymal stem cells (MSC) inhibit the immune response of lymphocytes to specific antigens and dendritic cells (DC) are professional antigenpresenting cells whose function is to present antigen to naive T-lymphocytes with high efficiency and play a central role in the regulation of immune response. We studied the effects of MSC on DC to evaluate the relationship between MSC and DC in transplantation immunology. Methods: MSC were expanded from the bone marrow and DC were cultured from peripheral blood mononuclear cells (PBMNC) of 6 myelogenous leukemia after achieving complete response. Responder cells isolated from PBMNC and lysates of autologous leukemic cells are used as tumor antigen. The effect of MSC on the DC was analyzed by immunophenotype properties of DC and by proliferative capacity and the amount of cytokine production with activated PBMNC against the allogeneic lymphocytes. Also, cytotoxicity tests against leukemic cells studied to evaluate the immunologic effect of MSC on the DC. Results: MSC inhibit the CD83 and HLA-class II molecules of antigen-loaded DC. The proliferative capacity and the amount of INF-$\gamma$ production of lymphocytes to allogeneic lymphocytes were decreased in DC co-cultured with MSC. Also the cytotoxic activity of lymphocytes against leukemic cells was decreased in DC co-cultured with MSC. Conclusion: MSC inhibit the activation and immune response of DC induced by allogeneic or tumor antigen.

허혈성 심근에 관상동맥우회술과 병행한 자가 골수줄기세포 이식 (Autologous Bone Marrow Cell Transplantation Combined with Off-pump Coronary Artery Bypass Grafting in Ischemic Myocardium)

  • 김현옥;곽영란;강석민;장양수;임상현;안지영;이창영;강면식;유경종
    • Journal of Chest Surgery
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    • 제37권7호
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    • pp.547-552
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    • 2004
  • 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 시행 받았던 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 ${\times}$ $10^{9}$ 개), 이 중에는 평균 6.7${\times}$$10^{6}$ CD34 + 세포와 3.7 ${\times}$ $10^{6}$ 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 관류 개선이 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.

세포를 제거한 이종 심장 판막 이식편을 사용한 조직공학 심장 판막첨의 생체 적합성에 대한 연구 (Biocompatibility of Tissue-Engineered Heart Valve Leaflets Based on Acellular Xenografts)

  • 이원용;성상현;김원곤
    • Journal of Chest Surgery
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    • 제37권4호
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    • pp.297-306
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    • 2004
  • 기존의 인공 심장 판막은 혈전 형성, 내구성, 세균 감염에 대한 저항력, 성장성 등에서 문제점을 가지고 있다 최근 이상적인 심장 판막을 개발하기 위한 노력으로 조직공학 기법을 이용하고 있다. 본 연구는 이종 판막을 지지체로 하여 이종 세포 제거 후 자가 세포를 파종한 조직공학 심장 판막을 개발하기 위하여 이종 세포 제거와 자가 세포 파종 방법을 비교하였고, 얻어진 심장 판막첨의 생체 적합성을 살펴보았다. 대상 및 방법: 이종 지지체로 두 마리의 돼지에서 각각 3개의 폐동맥 판막첨을 채취하여, Triton-X, freeze-thawing, NaCl-SDS 등 세 방법 중 하나로, 각각 두 개의 판막첨을 처리하고, 세포 제거 정도를 비교하였다. 염소의 경정맥에서 분리한 내피 세포를 배양하여, 상기한 방법 중 하나로 이종 세포가 제거된 돼지 판막첨에 파종한 후, 내피 세포의 보존 상해를 비교하였다. 생체 실험을 위해, 6마리 돼지에서 각각 2개의 폐동맥 판막첨을 채취해 이종 세포를 제거하였고, 6개의 판막첨은 염소의 내피 세포를 파종하고(이종-자가 이식편),다른 6개의 판막첨은 내피 세포를 파종않고(이종 이식편) 6마리 염소의 폐동맥 판막첨 두 개와 치환하였다. 치환되지 않은 하나의 판막첨을 대조군으로 비교하였다. 염소는 수술 6시간, 24시간, 1주일, 1개월, 3개월, 그리고 6개월 후 희생시키고 폐동맥 판막첨을 채취하여 분석하였다 걸과: Triton-X와 freeze-thawing 처리한 판막첨에서는 이종세포가 남아 있었으나, NaCl-SDS 처리한 판막첨에서는 세포가 완전히 제거되었고, 이종 세포 제거 후 파종한 자가 내피 세포도 NaCl-SDS 처리한 판막첨에서 다른 두 방법으로 처리한 판막첨에 비해 잘 보존되어 있었다. 6마리 염소는 혈색전증의 소견 없이 예정된 기간 동안 모두 생존하였으며, 희생 후 적출한 이종 이식편과 이종-자가 이식편 모두 대조군 보다 두꺼워져 있었다. 두 이식편 모두 24시간 후부터 섬유아세포의 증식이 관찰되었고, 1개월 후 세포의 개형(remodeling)과정을 볼 수 있었고, 3개월 후 세포 기능을 수행하였고, 6개월 후 대조군보다 세포수가 더 많이 증가하였다. 파종한 내피 세포는 잘 보존되어 있었고, 이종 이식편도 6개월 후에는 내피 세포가 피복 되어 있었다. 걸론: 이종 세포의 제거와 자가 세포의 파종에 가장 적합한 방법은 NaCl-SDS 처리였다 동물 실험에서 이종 이식편과 이종-자가 이식편 모두 6개월 간 지지체의 역할을 수행하면서, 자가 세포의 증식을 가능하게 하였고, 자가 조직으로 발전할 가능성을 보여 주었다.

Predictors of Outcome in Patients with Advanced Nonseminomatous Germ Cell Testicular Tumors

  • Yetisyigit, Tarkan;Babacan, Nalan;Urun, Yuksel;Seber, Erdogan Selcuk;Cihan, Sener;Arpaci, Erkan;Yildirim, Nuriye;Aksoy, Sercan;Budakoglu, Burcin;Zengin, Nurullah;Oksuzoglu, Berna;Yalcin, Banu Cicek;Alkis, Necati
    • Asian Pacific Journal of Cancer Prevention
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    • 제15권2호
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    • pp.831-835
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    • 2014
  • Background: Predictor factors determining complete response to treatment are still not clearly defined. We aimed to evaluate clinicopathological features, risk factors, treatment responses, and survival analysis of patient with advanced nonseminomatous GCTs (NSGCTs). Materials and Methods: Between November 1999 and September 2011, 140 patients with stage II and III NSGCTs were referred to our institutions and 125 patients with complete clinical data were included in this retrospective study. Four cycles of BEP regimen were applied as a first-line treatment. Salvage chemotherapy and/or high-dose chemotherapy (HDCT) with autologous stem cell transplantation were given in patients who progressed after BEP chemotherapy. Post-chemotherapy surgery was performed in selected patients with incomplete radiographic response and normal tumor markers. Results: The median age was 28 years. For the good, intermediate and poor risk groups, compete response rates (CRR) were, 84.6%, 67.9% and 59.4%, respectively. Extragonadal tumors, stage 3 disease, intermediate and poor risk factors, rete testis invasion were associated with worse outcomes. There were 32 patients (25.6%) with non-CR who were treated with salvage treatment. Thirty-one patients died from GCTs and 94% of them had stage III disease. Conclusions: Even though response rates are high, some patients with GCTs still need salvage treatment and cure cannot be achieved. Non-complete response to platinium-based first-line treatment is a negative prognostic factor. Our study confirmed the need for a prognostic and predictive model and more effective salvage approaches.

Multidisciplinary Collaborative Therapy for 30 Children with Orbital Rhabdomyosarcoma

  • Ge, Xin;Huang, Dong-Sheng;Shi, Ji-Tong;Ma, Jian-Min
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권8호
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    • pp.4641-4646
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    • 2013
  • Objective: To explore clinical experience and propose new ideas for treating children diagnosed with orbital rhabdomyosarcoma (RMS). Methods: We retrospectively analyzed the clinical data for30 patients (16 males and 14 females, with a median age of 6.2 years) with primary orbital RMS who were enrolled in the Department of Eye Oncology and Pediatrics of our hospital from November 2004 to December 2012. International Rhabdomyosarcoma Organization Staging Standards indicated that among the 30 patients, 4 cases were in phase II, 20 were in phase III, and 6 were in phase IV. All patients underwent a multidisciplinary collaborative model of comprehensive treatment (surgery, chemotherapy, external radiotherapy, $^{125}I$ radioactive particle implantation, and autologous peripheral blood stem-cell transplantation). Results: Follow-up was conducted until March 2013, with a median follow-up time of 47.2 months (5 to 95 months), and 7 deaths occurred. The 2-year estimated survival rate reached 86.1%, the ${\geq}3$-year estimated survival rate was 77%, and the 5-year estimated survival rate was 70.6%. Conclusions: The multidisciplinary collaborative model can be a safe and effective approach to the comprehensive treatment of children with orbital RMS. It has clinical significance in improving the tumor remission rate.

제대혈 유래 중간엽줄기세포에서 HLA의 발현과 Mixed Lymphocyte Reaction (Expression of HLA and Mixed Lymphocyte Reaction of Mesenchymal Stem Cells Derived from Human Umbilical Cord Blood)

  • 이효종;강선영;박세진;이승용;이희천;고필옥;박지권;백원영;연성찬
    • 한국임상수의학회지
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    • 제28권4호
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    • pp.399-402
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    • 2011
  • In recent years, the mesenchymal stem cells (MSC) derived from various tissues have been widely tested for developing cell therapies, tissue repair and transplantation. Although there has been much interest in the immunomodulatory properties of MSC and their immunologic reactions following autologous, allogeneic and xenogenic transplantation of MSC in vivo, up to date, the expression of immunogenic markers, such as class I and II human leukocyte antigens (HLA), after differentiation of human umbilical cord blood (hUCB)-derived MSC has been poorly investigated and require extensive in vitro and in vivo testing. In this experiment, the expression of the HLA-ABC and HLA-DR on hUCB-derived MSC have been tested by immunocytochemical staining. The undifferentiated MSC were moderately stained for HLA-ABC but very weakly for HLA-DR. In order to investigate the inhibitory effect of allogeneic lymphocytes on proliferation of MSC, the MSC were cultured in the presence or absence of peripheral allogeneic lymphocytes stimulated with concanavalin A. The allogeneic lymphocytes did not significantly inhibit MSC proliferation. We conclude that hUCB-MSC expressed moderately class I HLA antigen while almost negatively class II HLA antigen. The MSC have an immunomodulatory effect which can suppress the allogeneic response of lymphocytes. These in vitro data suggest that allogeneic MSC derived from cord blood can be useful candidate for allogeneic cell therapy and transplantation without a major risk of rejection.