• Biomolecules & Therapeutics
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• 제29권1호
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• pp.52-57
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• 2021

Fumonisin B1 (FB1) structurally resembles sphingolipids and interferes with their metabolism leading to sphingolipid dysregulation. We questioned if FB1 could exacerbate liver or kidney toxicities in glutathione peroxidase 1 (Gpx1) and catalase (Cat) knockout mice. While higher serum levels of thiobarbituric acid reactive substances (TBARS) and sphinganine (Sa) were measured in Gpx1/Cat knockout mice (Gpx1/Cat KO) than wild type mice after 5 days of FB1 treatment, serum levels of alanine aminotransferase (ALT), sphingosine-1 phosphate (So-1-P), and sphinganine-1 phosphate (Sa-1-P) were found to be relatively low. Although Sa was highly elevated in Gpx1/Cat KO mice and wild mice, lower levels of So and Sa were found in both the kidney and liver tissues of Gpx/Cat KO mice than wild type mice after FB1 treatment. Paradoxically, FB1-induced cellular apoptosis and necrosis were hastened under oxidative stress in Gpx1/Cat KO mice.

• Journal of Microbiology and Biotechnology
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• 제17권6호
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• pp.960-967
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• 2007

The co-immobilization of Aspergillus niger glucose oxidase (GOD) with bovine liver catalase (CAT) onto florisil (magnesium silicate-based porous carrier) was investigated to improve the catalytic efficiency of GOD against $H_2O2$ inactivation. The effect of the amount of bound CAT on the GOD activity was also studied for 12 different initial combinations of GOD and CAT, using simultaneous and sequential coupling. The sequentially co-immobilized GOD-CAT showed a higher efficiency than the simultaneously co-immobilized GOD-CAT in terms of the GOD activity and economic costs. The highest activity was shown by the sequentially co-immobilized GOD-CAT when the initial amounts of GOD and CAT were 10 mg and 5 mg per gram of carrier. The optimum pH, buffer concentration, and temperature for GOD activity for the same co-immobilized GOD-CAT sample were then determined as pH 6.5, 50 mM, and $30^{\circ}C$, respectively. When compared with the individually immobilized GOD, the catalytic activity of the co-immobilized GOD-CAT was 70% higher, plus the reusability was more than two-fold. The storage stability of the co-immobilized GOD-CAT was also found to be higher than that of the free form at both $5^{\circ}C\;and\;25^{\circ}C$. The increased GOD activity and reusability resulting from the co-immobilization process may have been due to CAT protecting GOD from inactivation by $H_2O2$ and supplying additional $O_2$ to the reaction system.

• 한국임상수의학회지
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• 제28권1호
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• pp.13-19
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• 2011

요 약: 정액 동결 과정은 활성산소종의 생성을 유발하며, 생성된 활성산소종은 정자의 손상을 일으키는 것으로 알려져 있다. 따라서 본 연구의 목적은 동결 과정 중 항산화 효소 중 하나인 catalase (CAT)를 첨가함으로써 융해 후 정자의 기능과 활성산소종의 수준에 미치는 효과를 알아보고자 하였다. 5마리 돼지에서 채취한 정액은 0 (대조군), 200, 400 U/mL CAT가 첨가되어 있는 동결 희석액으로 각각 동결하였다. 융해 후, 정자 운동성, 생존성, 정상 형태율, 형질막 온전성, 미토콘드리아 기능, 세포내 ROS를 평가하였다. CAT는 400 U/mL의 농도에서 전체 정자 운동성을 향상시켰지만 (P < 0.05), 전진 운동성, 생존성, 기형율, 형질막 온전성, 미토콘드리아 기능의 향상을 나타내지 않았다. 활성산소종의 평가에서, CAT는 융해된 생존 정자의 ${\cdot}O_2$의 감소에는 효과를 나타내지 않은 반면 $H_2O_2$를 감소시켰다(P < 0.05). 결론으로 CAT는 동결 및 융해된 정자의 질을 향상시키는 데 큰 효과를 나타내진 않았지만 생존 정자에서 $H_2O_2$을 제거함로써 생존정자의 산화적 손상을 감소시킬 수 있으리라 판단된다.

• 미생물학회지
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• 제38권4호
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• pp.239-239
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• 2002

• Bulletin of the Korean Chemical Society
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• 제35권9호
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• pp.2704-2710
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• 2014

Catalase (CAT) decomposes hydrogen peroxide that is toxic to the body. In this study, simple and sensitive detector has been developed for observing catalase activity using liquid crystal droplet system. Microscale LC droplet patterns are formed by spreading aldehyde-doped nematic liquid crystal on pre-treated glass slides. When hydrogen peroxide is added, aldehyde is oxidized and amphiphiles are formed. Dodecanoates cause the pattern to transit from bright to dark as they self-assemble to form a carboxyalte monolayer at the interface. When a drop of pre-incubated CAT and hydrogen peroxide mixture is placed onto the pattern, bright fan-shape is observed. This planar optical appearance indicates that catalase has decomposed hydrogen peroxide. Compared to the detectors that have been previously developed, this system is more sensitive with detection limit of 1fM. This research suggests further studies to be on LC droplet patterning to develop highly sensitive and methodologically simple sensors for various chemicals.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2001년도 추계학술발표대회
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• pp.863-866
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• 2001

Radish추출물을 수용성과 지용성으로 나누어 추출하여 DPPH 저해율, SOD 활성율, Catalase 활성, collagen 함량변화를 측정한 결과, DPPH 저해율과 Catalase 활성은 수용성 추출물(81.0%, 175units/mg)에서 높게 나타났고, SOD 활성율에서는 지용성 추출물(92.3%)이 높게 나타났다. 콜라겐$(21.45{\mu}g)$내의 pyridinoline의 함량은 control에 비해 수용성과 지용성 추출물을 첨가한 반응액에서 적었으며, 두 추출물을 비교해 봤을 때 큰 차이는 보이지 않았다.

• 생물정신의학
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• 제9권1호
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• pp.62-67
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• 2002

본 연구에서는 정신분열병과 antioxidant defense system사이의 관련성을 알아보기 위해 항산화 효소(antioxidant enzyme)중의 하나인 CAT의 유전자 다형성을 한국인 정신분열병 환자군과 대조군 사이에서 비교 분석하였다. 환자군과 대조군의 HinfI 다형성에 따른 CAT유전자형과 대립유전자형의 빈도는 통계적으로 유의한 차이는 없었지만, 여성 정신분열병 환자군과 여성 대조군 사이의 유전자형 빈도에서는 통계적으로 유의한 차이를 나타내었다. 연구결과 CAT유전자가 여성 정신분열병과 관련이 있을 수 있다는 가능성이 제시된다.

• 한국패류학회지
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• 제31권4호
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• pp.285-290
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• 2015

본 연구는 염화니켈 급성노출에 따른 북방전복의 산화스트레스효소 활성에 대한 변화를 알아보고자 하였다. 실험은 1개의 대조구와 5개의 농도구 (5.9, 8.8, 13.3, 20.0, 30.0 mg/L)에서 4일간 진행되었다. superoxide dismutase (SOD) 활성은 발과 간췌장의 경우 모든 니켈 노출구에서 증가하였으나 아가미에서는 감소하는 결과를 보였다. catalase (CAT) 활성은 발의 경우 20.0 mg/L 와 30.0 mg/L 니켈 노출구를 제외하고 증가하였으나 아가미에서는 대조구와 유사한 결과를 보였다. 간췌장에서는 모든 니켈 노출구에서 대조구에 비해 증가하는 결과를 보였다. 하지만 SOD와 CAT 활성 모두 대조구에 비해 유의적인 차이는 보이지 않았다 (P > 0.05).

• Journal of Microbiology
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• 제38권4호
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• pp.239-244
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• 2000

The cats gene encodes the major catalase in Sreptomyces coelicolor, whose production increases upon H$_2$O$_2$treatment. Besides the previously identified primary promoter (catApl), a minor promoter (catAp2) was newly assigned by S1 nuclease mapping. The catAp2 transcript was observed transiently upon entry into the stationary phase in liquid culture and upon differentiation on solid plates, whereas the level of catApl transcription did not chance significantly during this growth transition. ThecatApl promoter was transcribed by the major vegetative RNA polymerase holoenzyme containing $\sigma$$\^$HrdB/, whereas the catAp2 was transcribed in vitro by the holoenzyme containing $\sigma$$\^$R/ that is activated under oxidative conditions. The cia-element regulating the H$_2$O$_2$-inducibility of catApl was identified within the 23 bp inverted repeat sequence located between -65 and -43 of the catApl promoter. We roamed this sequence HRE (H$_2$O$_2$-responsive Element). The distal half of the inverted repeat was more crucial for H$_2$O$_2$-dependent induction of the catApl transcript than the proximal half. HRE most likely serves as a binding site for the H$_2$O$_2$-responsive repressor CatR.

• 대한의생명과학회지
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• 제26권3호
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• pp.201-209
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• 2020

The effect of mulberry leaves and yacon tuber extracts (MYE) on antioxidant was tested in this study. The present study investigated the in vivo effects of the anti-oxidative effect of MYE on catalase (CAT), superoxide dismutase (SOD), glutathione S-transferase (GST), glutathione peroxidase (GSH-Px), and thiobarbituric acid reactive substances (TBARS). The seven-day acclimation of the mice was divided into six groups: Normal diet group (NOR), high fat diet group (HFD), high fat diet with 0.5% hydroxycitric acid group diet group for positive group (HHCA), high fat diet with 1% mulberry leaf and 1% yacon diet group (MYE-1), high fat diet with 3% mulberry leaf and 3% yacon group (MYE-3) and high fat diet with 5% mulberry leaf and 5% yacon group (MYE-5). The effect of serum antioxidant in the catalase of MYE-1, MYE-3, and HHCA comparing to HFD by 31.0%, 27.7% and 45.2%, respectively (P<0.05~0.01). The effect on hepatic antioxidant in the catalase of HFD was significantly increased 3.7 (77.3%) times than that of NOR (P<0.01). But, the activities of catalase were decreased significantly in MYE-1, MYE-3, MYE-5 and HHCA by 21.7%, 24.2%, 24.9%, and 28.8% compared to HFD, respectively. GSH-Px was significantly decreased in MYE-1, MYE-3, MYE-5 and HHCA by 15.5%, 37.1%, 23.4%, and 23.7% compared to HFD, respectively (P<0.05). The activities of CAT, SOD, GST, GSH-Px, and TBARS were more significantly decreased in MYE-1 and MYE-3 than those of HFD and HHCA. MYE have shown significant effects on anti-oxidative function against high fat diet.