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Cathepsin B & D and the Survival of Early Embryos in Red Spotted Grouper, Ephinephelus akaara
Seo-Hui Gwon,Hyun Kyu Kim,Hea Ja Baek,Young-Don Lee,Joon Yeong Kwon 한국발생생물학회 2017 발생과 생식 Vol.21 No.4
Survival of embryos largely depends on yolk processing during early development. Proteolytic enzymes, cathepsin B & D (ctsb & ctsd) are known to have some important roles in yolk processing of various fish species. Mature female red spotted groupers were injected with human chorionic gonadotropin (HCG) to induce ovulation. The fertilized eggs and embryos were sampled at 0, 4 and 24 HPF (hours post fertilization). Survivals of each groups of embryos were checked at 24 and 48 HPH (hours post hatching). Transcripts of ctsb & ctsd showed the highest level at 0 HPF and relatively high at 4 HPF, but greatly decreased at 24 HPF. In bad egg quality group (BE, embryos survived until 24 HPH), transcript level of ctsb at 4 HPF were significantly lower than the transcript level at the same stage in good egg quality group (GE, embryos survived until 48 HPH) while no significant change of ctsb transcript level was observed at 0 or 24 HPF between BE and GE. Transcript level of ctsd was decreased at 24 HPF, but the difference was not as strong as the case of ctsb transcript. These results suggest that maternal ctsb transcript rather than ctsd transcript is likely to be involved in egg quality resulting in the difference of survival rate of embryos at early developmental period in this species.
Cathepsin B & D and the Survival of Early Embryos in Red Spotted Grouper, Ephinephelus akaara
Gwon, Seo-Hui,Kim, Hyun Kyu,Baek, Hea Ja,Lee, Young-Don,Kwon, Joon Yeong The Korean Society of Developmental Biology 2017 발생과 생식 Vol.21 No.4
Survival of embryos largely depends on yolk processing during early development. Proteolytic enzymes, cathepsin B & D (ctsb & ctsd) are known to have some important roles in yolk processing of various fish species. Mature female red spotted groupers were injected with human chorionic gonadotropin (HCG) to induce ovulation. The fertilized eggs and embryos were sampled at 0, 4 and 24 HPF (hours post fertilization). Survivals of each groups of embryos were checked at 24 and 48 HPH (hours post hatching). Transcripts of ctsb & ctsd showed the highest level at 0 HPF and relatively high at 4 HPF, but greatly decreased at 24 HPF. In bad egg quality group (BE, embryos survived until 24 HPH), transcript level of ctsb at 4 HPF were significantly lower than the transcript level at the same stage in good egg quality group (GE, embryos survived until 48 HPH) while no significant change of ctsb transcript level was observed at 0 or 24 HPF between BE and GE. Transcript level of ctsd was decreased at 24 HPF, but the difference was not as strong as the case of ctsb transcript. These results suggest that maternal ctsb transcript rather than ctsd transcript is likely to be involved in egg quality resulting in the difference of survival rate of embryos at early developmental period in this species.
봉합사를 이용한 인공수정체 공막고정술과 플랜지형 인공수정체 공막내고정술의 수술 결과 비교
조권희(Gwon Hui Jo),서의종(Eoi Jong Seo),정문선(Moon Sun Jung),김경태(Kyung Tae Kim) 대한안과학회 2023 대한안과학회지 Vol.64 No.5
목적: 봉합사를 이용한 고전적인 인공수정체 공막고정술과 무봉합 플랜지형 인공수정체 공막내고정술의 수술 결과와 합병증을 비교하고자 하였다. 대상과 방법: 이전에 인공수정체의 공막 고정을 위해 봉합사를 이용한 고전적인 인공수정체 공막고정술 또는 무봉합 플랜지형 인공수정체 공막내고정술을 받고 6달 이상 경과 관찰하였던 환자를 대상으로 후향적 의무기록을 분석하였다. 수술 전, 수술 후 1달, 3달, 6달째의 시력, 안압, 구면대응치, 난시값을 조사하였고, 수술 시간과 합병증 양상을 비교하였다. 결과: 고전적인 인공수정체 공막고정술을 받은 39안, 무봉합 플랜지형 인공수정체 공막내고정술을 받은 30안, 총 69안을 대상으로하였다. 수술 시간은 무봉합 플랜지형 인공수정체 공막내고정술 그룹에서 유의하게 짧았다(56.3 ± 11.8 vs. 77.7 ± 17.9, p<0.001). 두 그룹 모두에서 수술 전에 비해 수술 후 모든 시기에서 유의한 시력 호전을 보였으며(p<0.05), 두 그룹 간에 평균 최대교정시력, 구면대응치, 난시값, 합병증 빈도에서 차이를 보이지 않았다. 결론: 고전적인 인공수정체 공막고정술과 비교하여 무봉합 플랜지형 인공수정체 공막내고정술은 더 적은 수술 시간으로 효과적인시력 개선 효과를 보여주었다. 따라서 무봉합 플랜지형 인공수정체 공막내고정술은 고전적인 인공수정체 공막고정술의 효과적인 대안이 될 것으로 생각한다. Purpose: We compared the surgical outcomes and complications of conventional, sutured scleral fixation and flanged intrascleral intraocular lens (IOL) fixation. Methods: We retrospectively analyzed the medical records of patients who underwent conventional, sutured scleral fixation or flanged intrascleral IOL fixation and who were then observed for more than 6 months. The best-corrected visual acuity (BCVA), operation time, spherical equivalent (SEQ), astigmatism, and postoperative complications were recorded up to 6 months after surgery. Results: Of sixty-nine enrolled eyes, 39 underwent conventional, sutured scleral fixation (“sutured” group) and 30 flanged intrascleral IOL fixation (“sutureless” group). The operation time was significantly shorter in the sutureless group than in the sutured group (56.3 ± 11.8 vs. 77.7 ± 17.9 minutes, p < 0.001). In both groups, the BCVA and SEQ improved significantly at all visits after surgery compared to the baseline values p < 0.05). There was no between-group difference in BCVA, SEQ, astigmatism, or complications. Conclusions: Compared to conventional, sutured scleral fixation, flanged intrascleral IOL fixation afforded equivalent improvements in visual acuity but with a shorter surgical duration. Therefore, flanged intrascleral IOL fixation is a useful alternative to conventional, sutured scleral fixation.
Park, Hyeok,Gwon, Ju-Hui,Lee, Jong-Chul,Kim, Hyun Suk,Seo, Geon-Sik,Eom, Ahn-Heum The Korean Society of Mycology 2021 韓國菌學會誌 Vol.49 No.1
We collected the ascomata of Tuber species from the rhizosphere of Quercus dentata in Danyang, Korea. We observed the morphological characteristics of ectomycorrhizal roots and ascomata, and identified the species based on the results of the phylogenetic analysis conducted using the DNA sequences of an internal transcribed spacer, a large-subunit rDNA, translation elongation factor 1-α DNA (TEF1), and MAT. Finally, we identified the fungal species as Tuber himalayense B.C. Zhang & Minter, which has not been recorded previously in Korea. We evaluated the morphological characteristics and conducted phylogenetic analysis of the ascoma and mycorrhiza (associated with Q. dentata) of T. himalayense.
감마선 이용 AEMA 도입 PCL 나노섬유의 제조 및 특성분석
서다은(Da-Eun Seo),정성린(Sung In Jeong),박종석(Jong-Seok Park),권희정(Hui-Jeong Gwon),안성준(Sung-Jun An),이병헌(Byoung Hun Lee),임돈순(Don-Sun Im),신흥수(Heungsoo Shin),임윤묵(Youn-Mook Lim) 한국고분자학회 2017 폴리머 Vol.41 No.1
폴리카프로락톤(polycaprolactone, PCL)은 생체적합성이 우수하고 시간이 지나면 체내에서 생분해되어 조직공학용 생체재료로 많이 사용되고 있다. 하지만, 소수성 표면과 낮은 세포 부착성을 나타내는 단점이 있다. 따라서 본 연구에서는 PCL 필름 및 전기방사를 통한 나노섬유 지지체를 제조하고 감마선을 이용하여 친수성과 양전하의 아민기를 갖는 2-아미노에틸메타크릴레이트(2-aminoethylmethacrylate, AEMA)로 표면을 개질하였다. 감마선을 이용하여 표면 개질된 PCL 필름과 나노섬유의 분석 결과, ATR-FTIR을 통해 감마선 선량과 반응 표면적이 증가할수록 표면의 아민기가 증가함을 확인하였다. 아민기의 증가로 인해 친수성이 증가했음을 확인하였고 단백질 흡착량이 정전기적 인력으로 인해 증가함을 확인하였다. 이를 통해 AEMA가 도입된 PCL 필름보다 나노섬유 지지체의 경우 세포적합성이 향상된 조직공학용 지지체로서의 응용 가능성이 매우 높을 것으로 기대된다. Polycaprolactone (PCL) has been applied to tissue engineering because it has excellent biocompatibility and biodegradable properties. However, there is a limit to hydrophobic surface and low cell adhesion, therefore the PCL requires surface modification for increasing hydrophilicity and cell adhesion capacity. In this study, PCL films and nanofibers were manufactured by solvent casting and electrospinning, respectively. They were modified by 2-aminoethylmethacrylate (AEMA) that had hydrophilicity and amine groups of positive charge using gamma-irradiation. The surface properties of AEMA-grafted PCL films and nanofibers were confirmed by ATR-FTIR, and amine groups were increased by surface area and gamma-irradiation dose. A significantly higher amount of negative-charged proteins adhered to hydrophilic and cationic surface of AEMA-grafted PCL nanofibers than that of AEMA-grafted PCL films, because of increased amine groups and electrostatic interaction. The results show that AEMA-grafted PCL nanofibers are possible to apply tissue engineering scaffolds.
삼나무 조림지의 임분밀도에 따른 상대생장식과 현존량 확장계수
권정화 ( Jung Hwa Gwon ),서희영 ( Hui Yeong Seo ),이광수 ( Kwang Soo Lee ),유병오 ( Byung Oh You ),박용배 ( Yong Bae Park ),정재엽 ( Jae Yeob Jeong ),김춘식 ( Choon Sig Kim ) 한국임학회 2014 한국산림과학회지 Vol.103 No.2
경상남도 남해군의 유사한 입지환경에서 생육한 삼나무 조림지를 대상으로 47년생의 고밀도임분(667 tree·ha-1)과 49년생의 저밀도임분(267 tree·ha-1)으로 구분한 후 임분밀도에 따른 상대생장식과 현존량 확장계수를 비교하였다. 흉고직경을 독립변수로 하고 각 부위별 건중량을 종속변수로 하는 상대생장식은 고밀도임분의 가지, 저밀도임분의 잎과 종실을 제외하고 상대생장식의 유의성이 인정되었으며(P<0.05), 결정계수(R²)의 값은 0.80-0.96 범위였다. 또한 각 임분밀도에 대한 상대생장식(stand density-specific allometric equations)의 회귀계수(slope)에 유의적인 차가 없어(P>0.05), 일괄 상대생장식(generalized allometric equations)의 적용이 가능한 것으로 나타났다. 그러나 현존량 확장계수는 고밀도임분 1.33, 저밀도임분 1.50으로 임분밀도 간 유의적인 차가 있었다(P<0.05). 성숙한 삼나무 조림지의 바 이오매스 추정을 위한 상대생장식의 경우 임분밀도의 영향이 크지 않으나 현존량 확장계수의 경우 임분밀도에 따라 상당한 차이가 있었다. This study was conducted to evaluate stand density-specific and generalized allometric equations, and biomass expansion factors (BEFs) for two stand densities (high density of 47-year-old: 667 tree·ha-1; low density of 49-year-old: 267 tree·ha-1) of Cryptomeria japonica plantations in Namhae-gun, located in the southern Korea. Biomass in each tree component, i.e. foliage, branch, and stem, was quantified by destructive tree harvesting. Allometric regression equations of each tree component were significant (P<0.05) with diameter at breast height (DBH) accounting for 80-96% of the variation except for branch biomass in high density or foliage and cone biomass in low density. Generalized allometric equations can be used to estimate the biomass of C. japonica plantations because the slopes of allometric equations were not significantly different by the stand density. The biomass expansion factors (BEFs) were significantly lower in the high stand density (1.33) than in the low stand density (1.50). The results indicate that BEFs were affected by different stand density, while allometric equations were little related to the stand density.
( Hyeok Park ),( Ju-hui Gwon ),( Jong-chul Lee ),( Hyun Suk Kim ),( Geon-sik Seo ),( Ahn-heum Eom ) 한국균학회 2021 韓國菌學會誌 Vol.49 No.1
We collected the ascomata of Tuber species from the rhizosphere of Quercus dentata in Danyang, Korea. We observed the morphological characteristics of ectomycorrhizal roots and ascomata, and identified the species based on the results of the phylogenetic analysis conducted using the DNA sequences of an internal transcribed spacer, a large-subunit rDNA, translation elongation factor 1-α DNA (TEF1), and MAT. Finally, we identified the fungal species as Tuber himalayense B.C. Zhang & Minter, which has not been recorded previously in Korea. We evaluated the morphological characteristics and conducted phylogenetic analysis of the ascoma and mycorrhiza (associated with Q. dentata) of T. himalayense.