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우측 총장골동맥 혈전증이 초기 증상으로 발현된 막성 사구체신염
김지운 ( Ji Woon Kim ),박현정 ( Hyun Jung Park ),박지수 ( Ji Soo Park ),오지수 ( Ji Su Oh ),김조은 ( Jo Eun Kim ),오현주 ( Hyun Ju Oh ),김형종 ( Hyung Jong Kim ) 대한내과학회 2011 대한내과학회지 Vol.81 No.2
Most patients with nephrotic syndrome visit the hospital because of edema due to hypoalbuminemia induced by severe proteinuria. However, rare cases have reported arterial thrombosis as the main problem complicating nephrotic syndrome. Arterial thrombosis combined with nephrotic syndrome is rarer than venous thrombosis, and it usually develops during treatment with steroids or diuretics. Arterial thrombosis is rarely diagnosed as the initial sign of nephrotic syndrome. We report the case of a 38-year-old-woman with membranous glomerulonephritis presenting with right common iliac artery thrombosis as the initial sign. (Korean J Med 2011;81:257-261)
실크 피브로인을 함유한 비출혈용 복합 지혈제 개발에 대한 연구
문보미 ( Bo Mi Moon ),주형우 ( Hyung Woo Ju ),박현정 ( Hyun Jung Park ),이정민 ( Jung Min Lee ),이옥주 ( Ok Joo Lee ),박찬흠 ( Chan Hum Park ) 한국조직공학·재생의학회 2013 조직공학과 재생의학 Vol.10 No.2s
Epistaxis is defined as active bleeding arising from the nasal mucosa. It constitutes one of the most common otolaryngology emergencies and can be severe or even fatal. Hemostasis is a process which causes bleeding to stop, meaning to keep blood within a damaged blood vessel which involves differential sequential events. This system in humans has been the most extensively researched. However, lot of research work is going on and lot more needs to be done to overcome the problem associated with this serious issue. This study was conducted to develop a new sponge type of biomaterial to be used for ideal hemostatic agent. The combination of three biomaterials; Silk fibroin (SF), Hyaluronic acid (HA), Gelatin (Gel) and Polyvinyl alcohol (PVA) as proposed hemostatic agent were tested against commercially available hemostatic pad (ChitoClot®). A comparative study of these silk based hemostasis agents designed in combination of SF/HA/PVA and SF/Gel/PVA sponges were tested on injured model of rats. Each sponge to be tested was made same size of (1×1 cm) then applied on top of injury site while applying a pressure of 5 N for 30 seconds. The In vivo experiments were carried by creating a proximal arterial injury in unilateral femoral arteries of 12 anesthetized SD rats. In conclusion, this study suggest a new developed silk fibroin-based sponges as hemostatic materials, which induced durable hemostasis and an increased blood clotting in animal studies. These initial studies explores the loopholes present in the existing ChitoClot® pad compared with that of fabricated silkbased sponges.
초음파와 동결/융해에 의한 실크/PVA 하이드로젤의 제조 및 특성 평가
이옥주(Ok Joo Lee),김정호(Jung Ho Kim),주형우(Hyung Woo Ju),문보미(Bo Mi Moon),박현정(Hyun Jung Park),Faheem A Sheikh,박찬흠(Chan Hum Park) 한국고분자학회 2013 폴리머 Vol.37 No.6
실크 피브로인과 poly(vinyl alcohol)(PVA)는 뛰어난 생체적합성과 수용성을 가져 생체의학 분야에서 주목하는 재료이다. 본 연구에서는 실크 피브로인과 PVA를 초음파와 동결/융해 방법으로 드레싱제로서 사용 가능한 하이드로젤을 제조하고자 하였다. 실크와 PVA를 100/0, 75/25, 50/50, 25/75, 0/100 비율로 혼합하였다. 제작한 하이드로젤을 FE-SEM, TGA, FTIR, 압축 강도 측정 등을 통해 물성을 분석하였다. 실크/PVA 하이드로젤은 PVA 함량이 증가할수록 공극 크기와 팽윤도는 감소하였으며, 젤의 강도는 증가하였다. PVA를 첨가함으로써 실크의 기계적 물성이향상되는 것을 확인하였다. 본 연구에서 제조된 실크/PVA 하이드로젤은 드레싱제로서 사용 가능성을 제시하였다. Biomaterials like silk fibroin (SF) and poly(vinyl alcohol) (PVA) have received increasing attention in biomedical applications because of their attractive properties such as hydrophobicity and biocompatibility. In this study, efficient systems consisting of interpenetrating SF/PVA hydrogels were prepared as potential candidate for wound dressing applications. A simple approach consisting of sonication and a freezing-thawing technique was adopted to fabricate the hydrogels. Different blend ratios consisting of SF (100, 75, 50, 25 and 0%) with respect to the weight of PVA were prepared. The produced hydrogels were characterized for physico-chemical investigations using various states of techniques like; FE-SEM, TGA, FTIR and tensile strength. The addition of PVA to SF was proved to be beneficial in terms of reducing the pore size and swelling ratio of hydrogels. The mechanical property of SF had been increased by addition of PVA. These results show that SF/PVA hydrogels may serve as potential candidates for wound dressing application.
PCL/TiO₂ Nanoparticle 3차원 지지체 제조 및 특성 평가
김정호(Jun Ho Kim),이옥주(Ok Joo Lee),Faheem A Sheikh,주형우(Hyung Woo Ju),문보미(Bo Mi Moon),박현정(Hyun Jung Park),박찬흠(Chan Hum Park) 한국고분자학회 2014 폴리머 Vol.38 No.2
Polycaprolactone(PCL)은 생분해성 고분자로 인장강도, 신장률, 충격강도 등의 기계적 물성이 우수하다. TiO2(titanium dioxide) nanoparticle은 친수성으로 밀도가 높고 생체적합성이 우수하다. 본 연구에서는 PCL과 TiO2(titaniumdioxide) nanoparticle을 이용하여 salt-leaching방법으로 3차원 다공성 지지체를 제작하였다. 제작한 지지체를 FESEM,FTIR, TGA, 압축강도 측정 등을 통해 물성을 분석하였다. TiO2 nanoparticle에 의해 물흡수도와 팽윤도는 감소하였으나 압축강도는 증가하였다. CCK-8 assay를 통해 세포의 증식률을 확인한 결과, TiO2 nanoparticle에 의한세포 독성은 없는 것으로 확인되었다. 이러한 연구결과는 PCL/TiO2 nanoparticle 지지체의 생체재료로 사용가능성을 제시하였다. Polycaprolactone (PCL) is a synthetic biodegradable polymer with excellent mechanical properties. TiO2 (tita-nium dioxide) has a hydrophilic, high density and excellent biocompatibility. In this work, we produced three-dimensional porous scaffolds with PCL and TiO2 nanoparticles using a salt-leaching method. Physical properties of the scaffolds were analyzed by FE-SEM, FTIR, TGA and compressive strength. Interestingly, the addition of TiO2 nanoparticles decreased the water absorption and swelling ratio of the porous scaffolds. However, the compressive strength was increased by TiO2. CCK-8 assay, which is generally used for the analysis of cell growth, shows that TiO2 nanoparticles have no cytotoxicity. Taken together, we suggest that the PLC/TiO2-scaffold can be used for biomedical applications.
증례 : 신장 ; 급성 신부전과 흉수를 동반한 원발성 후복막강 섬유화증 1예
구승원 ( Seung Won Koo ),김미애 ( Mi Ae Kim ),김주환 ( Ju Hwan Kim ),유광호 ( Kwang Ho Yoo ),박현정 ( Hyun Jung Park ),김경호 ( Kyung Ho Kim ),김형종 ( Hyung Jong Kim ) 대한내과학회 2011 대한내과학회지 Vol.80 No.2S
저자들은 50세 남자 환자에서 요관 폐쇄에 의한 급성 신부전과 편측성 흉수를 동반한 원발성 후복막강 섬유화증을 진단하고, 요관내 카테터 삽입술을 시행받았으나 신부전 악화되어 경피적 신루술 및 steroid 투여 후에 급성 신부전 및 편측성 흉수의 호전을 보인 1예 경험하였기에 문헌고찰과 함께 보고하는 바이다. Idiopathic retroperitoneal fibrosis (IRF) is characterized by a fibrotic process and chronic inflammation of the retroperitoneal area and aorta. The development of retroperitoneal inflammation and fibrosis often results in periureteral encasement, ureteral obstruction, acute renal failure, and subsequent chronic renal failure and, rarely, mediastinal, pericardial, or pleural involvement. Our patient presented with left flank pain and abdominal computed tomography (CT) showed a retroperitoneal mass encompassing the aorta and both ureters. IRF was diagnosed after a biopsy of the retroperitoneal mass. A complicating left pleural effusion and acute renal failure developed and the patient underwent a percutaneous nephrostomy and was treated with prednisolone. After this, the patient`s symptoms, renal failure, and pleural effusion improved and the retroperitoneal mass decreased in size. We report a case of IRF with a pleural effusion and acute renal failure that improved with steroid treatment, with a literature review. (Korean J Med 2011;80:S263-S267)
성인형 여드름 환자의 사춘기 여드름 환자의 지질도 및 Propionibacterium acnes 수의 비교
박연준,최성우,박현정,김형옥,채경옥,고재숙 대한피부과학회 2000 대한피부과학회지 Vol.38 No.9
Background: Acne is principally a disorder of adolescence. However, a number of observational studies have documented a significant degree of acne in adult women. One study found a difference in women between late-onset acne and acne that persisted from adolescence. There were significant higher sebum excretion rates among women whose acne originated during the teenage years compared with late-onset acne groups. Objective: The purpose of this study was to examine the clinical features of patients with acne and to compare the sebum excretion rates and the density of P acnes in adult acne with that in adolescent acne. Methods: Thirty nine patients with acne vulgaris were clinically evaluated. Sebum secretion rates were evaluated by Sebutape method. The density of P acnes counted by scrub method. Results: 1. The severity grades were mild to moderate in adult acne groups, consisting with the lower acne lesion counts than that of adolescent acne groups. 2. Sebum secretion rates by Sebutape method showed different patterns in two groups. The mean value in the adult acne groups was lower than that in adolescent acne groups, but not statistically significant. Chin area dominant pattern, shown in adult acne groups, were not apparent in adolescent acne groups. 3. The density of P acnes was a lower mean value in the adult acne groups, but not statistically significant. Only in adolescent acne groups, the severity grades are well correlated to the density of P acnes. Conclusion: Adult acne was mild to moderate in severity. Clinically, adult acne differs from adolescent acne in that the lesions are located most commonly around the chin. Sebum excretion rate was the highest in the chin area of patients with adult acne. But there was no significant difference in two groups. Also the density of P acnes was not signiticantly different in two groups.