• Journal of Trauma and Injury
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• 제36권3호
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• pp.206-209
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• 2023

Purpose: Since its implementation, flexible fiberoptic bronchoscopy (FBS) has played an important role in the diagnosis and treatment of tracheobronchial tree and pulmonary disease. Although FBS is often performed by endoscopists, it has also been performed by surgeons, albeit rarely. This study investigated FBS from the surgeon's perspective. Methods: This retrospective study included patients who underwent FBS performed by a single thoracic surgeon between March 2017 and December 2021. Accordingly, the epidemiology, purpose, results, and complications of FBS were analyzed. Results: A total of 47 patients received FBS, whereas 13 patients underwent repeat FBS. Their mean age was 60.7 years. The main organs injured involved the chest (n=22), brain (n=9), abdominal organ (n=7), cervical spine (n=4), extremities (n=4), and face (n=1). The average Injury Severity Score was 22.5. Indications for FBS included atelectasis or haziness on chest x-ray (n=34), pneumonia (n=17), difficult ventilator management (n=7), percutaneous dilatory tracheostomy (n=3), blood aspiration (n=2), foreign body removal (n=2), and intubation due to a difficult airway (n=1). The findings of FBS were mucous plugs (n=36), blood and blood clots (n=16), percutaneous dilatory tracheostomy (n=3), foreign bodies (n=2), granulation tissue at the tracheostomy site (n=2), tracheostomy tube malposition (n=1), bronchus spasm (n=1), difficult airway intubation (n=1), and negative findings (n=5). None of the patients developed complications. Conclusions: FBS is an important modality in the trauma field that allows for the possibility of diagnosis and therapy. With sufficient practice, surgeons may safely perform FBS at the bedside with relative ease.

• Molecules and Cells
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• 제45권10호
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• pp.695-701
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• 2022

Homeostatic regulation of meristematic stem cells accomplished by maintaining a balance between stem cell self-renewal and differentiation is critical for proper plant growth and development. The quiescent center (QC) regulates root apical meristem homeostasis by maintaining stem cell fate during plant root development. Cell cycle checkpoints, such as anaphase promoting complex/cyclosome/cell cycle switch 52 A2 (APC/C^CCS52A2), strictly control the low proliferation rate of QC cells. Although APC/C^CCS52A2 plays a critical role in maintaining QC cell division, the molecular mechanism that regulates its activity remains largely unknown. Here, we identified SCF^FBS1, a ubiquitin E3 ligase, as a key regulator of QC cell division through the direct proteolysis of CCS52A2. FBS1 activity is positively associated with QC cell division and CCS52A2 proteolysis. FBS1 overexpression or ccs52a2-1 knockout consistently resulted in abnormal root development, characterized by root growth inhibition and low mitotic activity in the meristematic zone. Loss-of-function mutation of FBS1, on the other hand, resulted in low QC cell division, extremely low WOX5 expression, and rapid root growth. The 26S proteasome-mediated degradation of CCS52A2 was facilitated by its direct interaction with FBS1. The FBS1 genetically interacted with APC/C^CCS52A2-ERF115-PSKR1 signaling module for QC division. Thus, our findings establish SCF^FBS1-mediated CCS52A2 proteolysis as the molecular mechanism for controlling QC cell division in plants.

• KSBB Journal
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• 제8권5호
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• pp.473-477
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• 1993

하이브리도마 배양을 위해 첨가한 기존의 혈 청농도는 10% FBS였으나, 이 농도는 3%까지 줄여도 세포의 비성장속도와 최고세포농도에 차이가 없었다. 세포성장을 촉진한다고 알려진 물 질들을 1% FBS 배지에 첨가하였을 때 insulin, pyruvate, oxaloacetate, pluronic F-68 등에 의해 세포성장이 촉진되었다. 3% FBS는 2% CS로 대치할 수 있었고, 혈청의 농도는 IPOP의 첨가시 0.5 % CS에서도 active proliferation을 보였다. 최종 조성의 배지가격은 기존의 10 % FBS 배지의 1/10 정도였으며 배지조성을 cell line에 따라 달리 결정함으로써 배지의 가격은 현저히 낮출 수 있음을 알았다.

• Archives of Plastic Surgery
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• 제33권5호
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• pp.612-615
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• 2006

Purpose: An ideal bony construct can be divided into two broad categories: (1) the design and fabrication of biodegradable, biomimetic scaffolds that provide correct signals to induce osteogenesis: (2) the identification of an ideal source of osteoprogenitor cells to seed onto the scaffold. We selected poly-glycolic acid as a synthetic scaffold among various scaffolds because of these properties. Meanwhile, culture medium is supplemented with fetal bovine serum(FBS): such serum contains essential elements such as proteins, hormones, growth factors and trace minerals. The composition of FBS can be ideal for various cell growth in vitro. We supposed that we could enhance bone growth at a fractured site if FBS was mixed with synthetic scaffold-PGA. Methods: We cultured human osteoblasts in five different prepared culture dishes made with FBS and PGA mixture. The mixtures contained different ratio of FBS, that is, 0, 1.5, 3, 7, and 10%. We cultured human osteoblasts for seven days and examined the growth and attachment of the cells at the 1st, 3rd, 5th, 7th days, respectively. Results: In the mixture of 0% FBS and PGA, the growth of the cells lasted for one day. In 1.5 and 3% FBS and PGA, the growth of the cells was examined at the 3rd day, then minimally declined at the 5th and 7th days. In 7% FBS and PGA, the growth of the cells lasted for 5 days, then declined at the 7th day. In 10% FBS and PGA, the growth of the cells lasted for 5 days, then declined at the 7th day. Staining status of the osteoblasts with alkaline phosphatase showed pale pink color in 0% FBS and PGA groups, but bright pink color in 1.5, 3, 7, 10% FBS and PGA groups, especially in 3%, 7%. Conclusion: In consequence, the growth of human osteoblast was higher in the mixture of FBS and PGA groups than in pure PGA ones. It is assumed that the mixture of FBS and PGA affects the proliferation of human osteoblasts.

• 한국가축번식학회지
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• 제19권3호
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• pp.217-226
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• 1995

본 연구는 돼지 미성숙난포란의 체외배양시 핵성숙에 미치는 EGF의 효과를 검토하고자 실시하였다. 기초 배양액으로는 TCM-199에 0.2mM pyruvate, 1$\mu\textrm{g}$/ml estradiol-17$\beta$, 25$\mu\textrm{g}$/ml gentamycin을 첨가하였으며, 이 배양액에 EGF, FSH와 FBS을 처리하였다. 실험 1에서는 난포란 성숙에 있어서 FSH와 0, 10, 100 ng EGF/ml의 농도에 따른 효과를 조사하였던 바, 1, 10, 100 ng EGF/ml가 처리된 군의 핵성숙율은 83.0, 86.7, 87.5%로서 무처리군 27.3%와 FSH 처리군 60.3%보다 유의하게 높았다(p<0.001). 실험 2에서는 EGF, FSH와 FBS의 상호작용에 대해서 조사하였다. EGF 단독, EGF에 FSH 첨가, EGF에 FBS 첨가, FSH에 FBS 첨가와 EGF와 FSH에 FBS가 첨가된 군의 핵성숙율은 86.7, 90.2, 87.1, 89.6, 92.6%로서 무처리 군 22.3%, FSH와 FBS가 각각 단독 처리된 군의 52.2, 42.3%보다 유의하게 높았다(p<0.001). 또한, 정상적인 난구세포의 팽창은 FSH에 FBS, FSH에 EGF 혹은 FSH, EGF와 FBS가 첨가된 군에서 나타났으며, EGF가 첨가된 군에서는 대부분의 난구세포가 난포란으로부터 분리되었지만, 일부는 덩어리로 난포란에 부착되어 있었다. 따라서, EGF는 돼지 미성숙난포란에 있어서 핵성숙을 유도할 수 있다고 사료된다.

• Asian-Australasian Journal of Animal Sciences
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• 제11권6호
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• pp.655-660
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• 1998

To produce blastocysts more efficiently, it is required to identity accurately the factors involving embryonic cleavage in the chemically defined medium. Effects of pyruvate, lactate, calcium and protein sources on early cleavage of bovine follicular oocytes were investigated. The percentage of IVF embryos cleaved to ${\geq}$ 2-cell or ${\geq}$ 8-cell was higher in pyruvate (+) and lactate (+) (48 or 14%) than in pyruvate (-) and lactate (-) (22% or 4%), than in pyruvate (+) and lactate (-) (28% or 5%) and than in pyruvate (-) and lactate (+) (40% or 10%). Lactate was more effective than pyruvate during early cleavage of bovine embryos in the chemically defined medium. The percentage of IVF embryo cleaved to ${\geq}$ 2-cell and ${\geq}$ 8-cell in calcium (-) (19 and 6%) was significantly (p < 0.05) lower than in calcium (+) (78 and 45%). The percentage of embryos developed to ${\geq}$ 2-cell showed no significant (p < 0.05) difference among BSA, 1 and 20% FBS (57, 57 and 57%). Also the percentage of A grade embryos developed to ${\geq}$ 2-cell showed no significant (p < 0.05) difference among BSA, 1 and 20% FBS (40, 35 and 28%). The percentage of embryos developed to ${\geq}$ 8-cell showed no significant (p < 0.05) difference among BSA, 1 and 20% FBS (33, 23, and 22%). However, the percentage of A grade embryos developed to ${\geq}$ 8-cell in BSA (24%) was significantly (p < 0.05) higher than in 1 and 20% FBS (13 and 8%). The percentage of embryos developed to ${\geq}$ morula showed no significant (p < 0.05) difference among BSA, 1, 10 and 20% FBS (76, 76, 80 and 68%). The percentage of A grade embryos developed to ${\geq}$ morula in 10% FBS (59%) was significantly (p < 0.05) higher than 20% FBS (43%). The percentage of embryos developed to blastocyst showed no significant (p < 0.05) difference among BSA, 1, 10 and 20% FBS (34, 41, 43 and 32%). However, the percentage of A grade embryos developed to ${\geq}$ blastocysts in 10% FBS (25%) was significantly (p < 0.05) higher than in 20% FBS (8%).

• Nutrition Research and Practice
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• 제9권3호
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• pp.256-261
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• 2015

BACKGROUND/OBJECTIVES: Yacon (Samallanthus sonchifolius), a common edible plant grown throughout the world, is well known for its antidiabetic properties. It is also known to have several other pharmacological properties including anti-inflammatory, anti-oxidant, anti-allergic, and anti-cancer effects. To date, the effect of yacon on gliomas has not been studied. In this study, we investigated the effects of yacon on the migration and proliferation of C6 glioma cells stimulated by fetal bovine serum (FBS). MATERIALS/METHODS: Cell growth and proliferation were determined by evaluating cell viability using an EZ-Cytox Cell Viability Assay Kit. FBS-induced migration of C6 glioma cells was evaluated by performing the scratch wound healing assay and the Boyden chamber assay. We also used western blot analysis to determine the expression levels of extracellular signal-regulated kinase 1/2 (ERK1/2), a major regulator of migration and proliferation of glioma cells. Matrix metallopeptidase (MMP) 9 and TIMP-1 levels were measured by performing reverse transcription PCR. RESULTS: Yacon ($300{\mu}g/mL$) reduced both the FBS-induced proliferation of C6 glioma cells and the dose-dependent migration of the FBS-stimulated C6 cells. FBS-stimulated C6 glioma cells treated with yacon (200 and $300{\mu}g/mL$) showed reduced phosphorylation of ERK1/2 and inhibition of MMP 9 expression compared to those shown by the untreated FBS-stimulated C6 cells. In contrast, yacon (200 and $300{\mu}g/mL$) induced TIMP-1 expression. CONCLUSIONS: On the basis of these results, we suggest that yacon may exert an anti-cancer effect on FBS-stimulated C6 glioma cells by inhibiting their proliferation and migration. The most likely mechanism for this is down-regulation of ERK1/2 and MMP9 and up-regulation of TIMP-1 expression levels.

• Parasites, Hosts and Diseases
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• 제31권4호
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• pp.379-381
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• 1993

우태아혈청의 성분이 Toxoplasma의 숙주세포 침투를 억제하는 현상을 보여 이를 보고하고자 한다. MDCK세포를 숙주로 하여 Toxoplasma의 RH주를 첨가하였을 때, 우태아혈청 농도 1%(v/v) 에서 억제 효과가 나타나기 시작하여 5%일때 침투능을 반감시켰다. 우태아절청의 비동화 여부는 억제 효과에 영향을 미치지 못하였으며, 우태아혈청을 $95^{\circ}C$에서 10분간 처리하여 억제물질의 기능을 파괴시킬 때 억제 효과는 약간 감소되었다. Toxoprasma를 먼저 우태아혈청으로 처리한 후 숙주 세포에 첨가하였을 때 침투능에는 효과를 미치지 못하였으나, Tomplasma를 숙주세포와 배양하면서 우태아혈청을 첨가하였을 때에는 시간의 경과에 따라 침투능을 억제시켰다. 이상의 결과로 우태아혈청에 Toxoplasma의 숙주세포 침투를 억제하는 성분이 존재하는 것을 확인하였으며, 억제 방법이 침투하는 순간에 일어나며, 억제물질의 기능을 통해서라기 보다는 구조를 통해서 이루어진다고 추정할 수 있었다.

• 한국수정란이식학회지
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• 제31권1호
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• pp.39-46
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• 2016

Cryopreservation has been applied successfully in many mammalian species. Nevertheless, pig embryos, because of their greater susceptibility to cryoinjuries, have shown a reduced developmental competence. The aim of this study was to evaluate the survival status of vitrified-warmed porcine embryos. Forced blastocoele collapse (FBC) and non-FBC blastocysts are vitrified and concomitantly cultured in culture media which were supplemented with/without fetal bovine serum (FBS). Porcine vitrified-warmed embryos were examined in four different methods: group A, non-FBC without FBS; group B, non-FBC with FBS; group C, FBC without FBS; group D, FBC with FBS. After culture, differences in survival rates of blastocysts derived from vitrified-warmed porcine embryos were found in group A~D (39.5 (A) vs 52.5 (B) and 54.8 (C) vs 66.7% (D), respectively, p<0.05). Reactive oxygen species (ROS) level of survived blastocysts was lower in group D than that of another groups (p<0.05). Moreover, total cell number of survived blastocysts was higher in group D than that of other groups (p<0.05). Otherwise, group D showed significantly lower number of apoptotic cells than other groups ($2.0{\pm}1.5$ vs $3.2{\pm}2.1$, $2.8{\pm}1.9$, and $2.7{\pm}1.6$, respectively, p<0.05). Taken together, these results showed that FBS/FBC improves the developmental competence of vitrified porcine embryos by modulating intracellular levels of ROS and the apoptotic index during the vitrification/warming procedure. Therefore, we suggest that FBS and FBC are effective treatment techniques during the vitrification/warming procedures of porcine blastocysts.

• Reproductive and Developmental Biology
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• 제33권2호
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• pp.85-91
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• 2009

In this study, in vitro maturation system using fetal bovine serum (FBS) or porcine follicular fluid (pFF) was investigated to produce comparable oocytes to those derived from in vivo. Control group of oocytes was cultured in TCM 199 supplemented with 0.1% polyvinyl alcohol (PVA). Other three groups of oocytes were cultured in TCM 199 supplemented with 10% FBS, 10% pFF or 5% FBS + 5% pFF, respectively. After 44 h maturation, oocytes with the first polar body were activated with two electric pulses (DC) of 1.2 kv/cm for 30 ${\mu}sec$. Also, matured oocytes of four groups were reconstructed and fused. Reconstructed embryos were cultured in PZM-3 under 5% $CO_2$ in air at $38.5^{\circ}C$ for 6 days. The oocytes matured in the medium supplemented with FBS or/and pFF showed significantly higher maturation rates (64.0 vs. 73.9 to 85.2%). In PA embryos, cleavage rates (89.7 vs. 77.1 to 86.6%) and blastocysts rates (30.0 vs. 16.2 to 26.2%) were significantly higher in pFF group (p<0.05). In NT embryos, there was no difference among treatments in cleavage rate, but the blastocyst rates (28.5 vs. 15.5 to 24.6%) were significantly higher in pFF group (p<0.05). The apoptosis rate was significantly higher (p<0.05) in the control than other groups (10.8 vs. 4.9 to 8.2% for PA, 3.1 vs. 0.5 to 1.3% for NT). In order to select the comparable oocyte to in vivo oocytes, each group of oocytes was stained with Brilliant cresyl blue (BCB) after 42h maturation. The matured oocytes were separated according to color of cytoplasm; stained group (BCB+) and unstained group (BCB-). The oocytes matured in the presence of FBS or/and pFF showed significantly higher staining rates (70.3 to 72.7 vs. 35.1%) (p<0.05). To verify the fact that the supplementation of FBS or/and pFF can increase the maturation rates, cdc2 kinase activity, the catalytic subunit of MPF, was determined. The cdc2 kinase activity of the oocytes matured in the medium supplemented with FBS or/and pFF was significantly higher than control group (6.7 to 9.3 vs. 3.8). In conclusion, the supplementation of FBS or/and pFF can support in vitro maturation rate of porcine oocytes through the increment of cdc2 kinase activity level in the cytoplasm.