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Therapeutic Angiogenesis via Solar Cell-Facilitated Electrical Stimulation
Jeong, Gun-Jae,Oh, Jin Young,Kim, Yeon-Ju,Bhang, Suk Ho,Jang, Hyeon-Ki,Han, Jin,Yoon, Jeong-Kee,Kwon, Sang-Mo,Lee, Tae Il,Kim, Byung-Soo American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.44
<P>Cell therapy has been suggested as a treatment modality for ischemic diseases, but the poor survival and engraftment of implanted cells limit its therapeutic efficacy. To overcome such limitation, we used electrical stimulation (ES) derived from a wearable solar cell for inducing angiogenesis in ischemic tissue. ES enhanced the secretion of angiogenic growth factors and the migration of mesenchymal stem cells (MSCs), myoblasts, endothelial progenitor cells, and endothelial cells in vitro. In a mouse ischemic hindlimb model, ES generated by a solar cell and applied to the ischemic region promoted migration of MSCs toward the ischemic site and upregulated expression of angiogenic paracrine factors (vascular endothelial, basic fibroblast, and hepatocyte growth factors; and stromal cell-derived factor-l alpha). Importantly, solar cell-generated ES promoted the formation of capillaries and arterioles at the ischemic region, attenuated muscle necrosis and fibrosis, and eventually prevented loss of the ischemic limb. Solar cell ES therapy showed higher angiogenic efficacy than conventional MSC therapy. This study shows the feasibility of using solar cell ES as a novel treatment for therapeutic angiogenesis.</P>
유채대의 이단 고온 처리에 의한 알콜 발효용 당화물 생산
한재건(Jae-Gun Han),오성호(Sung-Ho Oh),정명훈(Myoung-Hoon Jeong),김승섭(Seung-Seop Kim),서현범(Hyeon-Beom Seo),정경환(Kyung-Hwan Jeong),장영석(Young-Seok Jang),김일철(Il-Cheol Kim),이현용(Hyeon-Yong Lee) 한국생물공학회 2009 KSBB Journal Vol.24 No.5
우리 연구팀은, 농산부산물인 유채대의 알콜 발효용 당 화물 생산 가능성을 연구하였다. 이를 위해 농산부산물인 유채대를 연속적으로 5 mL/min의 속도로 산을 이용하지 않고 증류수만을 이용해 이단 고온 처리 (200℃ and 15 Mpa, 375℃ and 23 Mpa)하였다. 본 전처리 공정을 통한 가수수분해물의 당화물 생성은 최종적으로 자일로스와 글루코스의 경우 25.6 g/L, 5.5 g/L가 생성되었다. 이는 유채대에 존재하는 글루코스와 자일로스의 초기 양 대비 각각 18%와 59%의 전환 수율을 나타낸다. 또한 이 공정은 타 공정들에 비하여 대표발효 저해 산물인 HMF의 생성량이 0.2 ppm으로 극히 낮은 수치를 보였으며, 가수분해물의 에탄올 생산시, 글루코스의 발효를 통한 에탄올 생성 전환수율이 90% 이상으로 높은 생성율을 보였다. 따라서 본 공정을 통해 다른 농산부산물이나 해조류 전체에 응용된다면, 고 수율의 에탄올 생산용 당화물을 생산할 것으로 예상한다. Two-step pretreatment process was investigated to efficiently hydrolyzed rape stems for obtaining fermentable sugars. The process was consisted of two consecutive steps as 200℃ and 15 MPa and 374℃ and 24 MPa with the flow rate of 5 mL/min. Under this condition, 5.5 (g/L) of glucose and 25.6 (g/L) of xylose were obtained from rape stems, showing 18% of glucose yield based on 25% cellulose in the rape stems. It was also found that this process could generate less amounts of toxic residues, such as HMF (Hydroxy- Methyl-Furfural) and other fulfural components during hydrolysis process. It could reaction maintain relatively high ethanol production yield as 90% of theoretical conversion yield from glucose. Therefore, this pretreatment process could be applied to hydrolyze other cellulosic and marine resources such as woods, stem and algae for bioethanol production.
상부위장관내시경검사 중 관상동맥 혈관경축으로 심정지를 일으킨 후 회복되었던
조대현 ( Jo Dae Hyeon ),박정호 ( Park Jeong Ho ),권정훈 ( Kwon Jeong Hun ),김현서 ( Kim Hyeon Seo ),김재희 ( Kim Jae Hui ),오주현 ( O Ju Hyeon ),심상군 ( Sim Sang Gun ) 대한내과학회 2003 대한내과학회지 증례 특집호 65-5 부록3 Vol.0 No.-
The incidence of serious cardiac complications associated with esophagogastro-duodenoscopic examination is very rare. An episode of cardiac arrest developed in 49-year-old during endoscopic examination. The patient had no history of pulmonary or ischemic
( Gun Wung Na ),( Sang Goon Shim ),( Kil Jong Yu ),( Dae Hyeon Cho ),( Chang Uk Jeong ),( Ji Eun Oh ),( Hyun Chin Cho ),( Kwang Min Kim ),( Hyoun Soo Lee ),( Man Je Park ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: In men, erectile dysfunction (ED), which is defi ned as the inability to achieve or maintain an erection suffi cient for satisfactory sexual performance, is an important issue. There were extensive investigations in clinical and pathophysiological mechanisms with sexual dysfunction during the last decade. However, ED in patients with chronic viral hepatitis has been investigated in few and limited studies, which are often not comparable because they use different survey and patient-sampling methodologies. Moreover, few have evaluated the association of ED and depression in patients with chronic viral hepatitis. Therefore, we assessed the prevalence of ED, and their association with depression in patients with chronic viral hepatitis. Methods: This cross-sectional study was conducted from August 2013 through January 2014. All outpatients with chronic viral hepatitis between the age of 18 and 80 years were considered eligible. The exclusion criteria included well established causes of erectile dysfunction such as liver cirrhosis and alcohol abuse. Erectile dysfunction was assessed with the International Index of Erectile Function-5 (IIEF-5) scale. The Beck Depression Inventory (BDI) scale was used to assess depression of the patient. Results: The prevalence of erectile dysfunction among the patients with chronic viral hepatitis was 40%. Age, employment, peg-interferon, IIEF-5 scores and BDI scores were statistically associated with erectile dysfunction. And also, IIEF-5 scores correlated negatively with age, employment and BDI scores. In a multiple logistic regression analysis, age and depression were independently associated with erectile dysfunction. Conclusions : Patients with chronic viral hepatitis have a high prevalence of erectile dysfunction. Age and depression are independent factors of erectile dysfunction in male patients with chronic viral hepatitis. Evaluation of depression must be included to properly manage erectile dysfunction.