• 제목/요약/키워드: Mannan

검색결과 79건 처리시간 0.03초

Binding Specificity of Philyra pisum Lectin to Pathogen-Associated Molecular Patterns, and Its Secondary Structure

  • Park, Byung Tae;Kim, Byung Sun;Park, Heajin;Jeong, Jaehoon;Hyun, Hanbit;Hwang, Hye Seong;Kim, Ha Hyung
    • The Korean Journal of Physiology and Pharmacology
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    • 제17권6호
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    • pp.547-551
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    • 2013
  • We recently reported a Philyra pisum lectin (PPL) that exerts mitogenic effects on human lymphocytes, and its molecular characterization. The present study provides a more detailed characterization of PPL based on the results from a monosaccharide analysis indicating that PPL is a glycoprotein, and circular dichroism spectra revealing its estimated ${\alpha}$-helix, ${\beta}$-sheet, ${\beta}$-turn, and random coil contents to be 14.0%, 39.6%, 15.8%, and 30.6%, respectively. These contents are quite similar to those of deglycosylated PPL, indicating that glycans do not affect its intact structure. The binding properties to different pathogen-associated molecular patterns were investigated with hemagglutination inhibition assays using lipoteichoic acid from Gram-positive bacteria, lipopolysaccharide from Gram-negative bacteria, and both mannan and ${\beta}$-1,3-glucan from fungi. PPL binds to lipoteichoic acids and mannan, but not to lipopolysaccharides or ${\beta}$-1,3-glucan. PPL exerted no significant antiproliferative effects against human breast or bladder cancer cells. These results indicate that PPL is a glycoprotein with a lipoteichoic acid or mannan-binding specificity and which contains low and high proportions of ${\alpha}$-helix and ${\beta}$-structures, respectively. These properties are inherent to the innate immune system of P. pisum and indicate that PPL could be involved in signal transmission into Gram-positive bacteria or fungi.

Comparative Effects of Sodium Gluconate, Mannan Oligosaccharide and Potassium Diformate on Growth Performances and Small Intestinal Morphology of Nursery Pigs

  • Poeikhampha, T.;Bunchasak, C.
    • Asian-Australasian Journal of Animal Sciences
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    • 제24권6호
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    • pp.844-850
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    • 2011
  • This study was conducted to compare the effects of dietary supplementation of Sodium Gluconate (SG), Mannan Oligosaccharide (MOS) and Potassium Diformate (PDF) on growth performance and small intestinal morphology in nursery piglets. One hundred forty four female piglets ($11.69{\pm}0.71\;kg$) were divided into 4 treatments with six replicates of six pigs each. The pigs received a control diet or diets supplemented with SG, MOS and PDF at 2,500, 3,000 and 8,000 ppm; respectively, for 6 weeks. Supplementation of SG, MOS or PDF increased final body weight, average daily gain and tended to improve feed to gain ratio (p = 0.02, 0.04 and 0.16; respectively), other than average daily feed intake, intestinal pH and the bacterial populations were not influenced by the dietary treatments. SG significantly decreased the ammonia concentration in the caecum (p<0.05) and supplementation of SG, MOS or PDF tended to increase lactic acid and total short chain fatty acid concentration in the caecum (p = 0.08, 0.09; respectively), in addition SG, MOS or PDF slightly increased butyric acid concentration in the caecum (p = 0.14). SG highly significant increased the villous height in jejunum (p<0.01) and supplementing SG, MOS or PDF significantly increased crypt depth in jejunum (p<0.05), moreover, PDF significantly increased villous height and crypt depth ratio in jejunum (p<0.05) compared with control. The dietary treatments did not influence villous height and crypt depth in duodenum and villous height in jejunum (p>0.05). It can be concluded that supplementing SG, MOS or PDF as a feed additive has the potential to improve the growth performance, the intestinal lactic acid bacteria population, intestinal short-chain fatty acid concentration and the intestinal morphology of pigs.

구약감자 성분분석(成分分析) (Analysis of Chemical Components of Elephant-foot (Amorphophallus konjac. k))

  • 이희덕;이정일
    • 한국약용작물학회지
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    • 제4권3호
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    • pp.261-264
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    • 1996
  • 건강식품과 민방의 약으로 수요가 증가되는 구약감자에 대해 재배종인 금산종과. 일본 및 중국종에 대한 성분분석을 통하여 품종개량에 대한 기초정보를 얻고자 이들에 대한 성분 분석을 실시한 결과를 요약하면 다음과 같다. 1. 생체 분석결과 구약감자의 mannan의 주성분인 탄수화물은 금산종, 일본수집종에서 15%로 비슷하였고. 중국종보다 높았으며, 정분(精紛)분석에서는 중국, 일본 수집종이 80%로써 금산 수집종의 73%보다 높게 나타났다. 2. 유리당 함량은 금산수집종 중국종, 일본종 정분 순으로 함유량이 높았다. 3. 무기함량은 금산수집종에서 인, 칼리, 철분이 비교적 다른 수집 종보다 높은 편이었고, 중국 수집 종에서 칼슘, 나트륨이 비교적 많이 함유되었다.

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수집종긴의 구약감자 성분비교 (Comparison of Chemical Components among varieties of Elephant-food (Amorphophallus konjac, K.))

  • 이희덕
    • 한국자원식물학회지
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    • 제9권3호
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    • pp.218-223
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    • 1996
  • 본 실험은 건강식품과 민간요법으로 수요가 증가되는 구약감사 국내 수집종인 금산종과, 외국수입종인 일본 및 중국종에 대한 성분분석을 통하여 건전한 식품문화를 정착시키고 품종개량에 대한 기초정보를 얻고자 이들 각각에 대한 성분분석을 실시 한 결과를 요약하면 다음과 같다. 1. 생체 분석결과 구약감자 mannan의 주함량인 탄수화물은 금산, 일본수집종에서 15% 비슷하였고, 정분분석에서는 중국 chip과 일본 수집종이 79%로서 금산 수집종, 73%보다 높게 나타났다. 2. 유리당 함량은 금산수집종, 중국 chip, 일본정분순으로 함유량이 높았으나, 아미노산은 일본정분, 중국 chip, 금산수집종 순으로 함량이 높았다. 3. 무기함량은 금산수집종에서 인, 칼리, 철분이 비교적 다른 수집종보다 높은 편이었고, 중국수집종에서 칼슘, 나트륨이 비교적 많이 함유되었다. 4. 가용성 유리당과 아미노산 함량이 많을수록 구약식품의 점도가 저하되었다.

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Effects of Mannan-oligosaccharides and Live Yeast in Diets on the Carcass, Cut Yields, Meat Composition and Colour of Finishing Turkeys

  • Konca, Yusuf;Kirkpinar, Figen;Mert, Selim
    • Asian-Australasian Journal of Animal Sciences
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    • 제22권4호
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    • pp.550-556
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    • 2009
  • This study was designed to evaluate the effects of dietary prebiotic (mannan oligosaccharide = MOS) and probiotic (Saccharomyces cerevisiae = SC) in finishing turkey diets on carcass, cut yield, meat composition and colour. A total of 72 ten-weeksold Big6 male turkey poults were used in the trial. There were eight replicate floor pens per floor with three birds in each. The experiment lasted up to 20 wks of age. The trial was set up as a completely randomized design with 3 dietary treatments. The treatments were: i) negative control (C, no additive); ii) MOS 1 g per kg of diet and iii) SC 1 g per kg of diet (strain SC47, $300{\times}10^{10}$ CFU/kg). Body weight (BW) and feed intake were determined for each of the two week intervals. Twenty-four birds were slaughtered and eviscerated to determine carcass, carcass parts and internal organ weights at 20 wks of age. Meat colour and pH levels were measured 24 h after slaughter. The dietary treatments did not affect BW and average daily gain during the trial (p>0.05). The average daily feed intake and feed conversion ratio of turkey toms fed with MOS were higher than those of control and SC groups during the overall period (p<0.05). The dietary treatments did not affect carcass yield, breast meat, thigh, wing, liver, heart, empty gizzard, intestine, and abdominal fat pad proportions and meat pH, composition and pigmentation (p>0.05). These results suggest that the addition of MOS and SC is not likely to produce any performance or carcass characteristics in finishing turkeys at 10 to 20 wks of age.

Systematic Review on Application of Whey Towards Production of Galacto-oligosaccharide Using β-Galactosidase Enzyme from Pichia pastoris

  • Ramachandran, C;Oh, Deog-Hwan
    • 한국식품위생안전성학회지
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    • 제35권4호
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    • pp.304-311
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    • 2020
  • Galacto-oligosaccharides(GOS)는 프로바이오틱스 미생물의 성장을 증진시켜 인류 건강에 유익한 작용을 갖게 하는 프리바이오틱스이며 식품 산업에서 다양한 활용성을 갖는다. GOS는 보통 β-galactosidase에 의해 촉매 반응이 일어난 lactose로부터 생성된다. 한편, 세포 표면 발현은 살아있는 세포 표면의 펩타이드와 단백질을 세포의 기능성 성분에 융합시켜 발현시키는 것이다. 표층 발현 세포는 다양한 잠재적 이용가치를 갖는다. N 말단 부근에 위치하는 것으로 생각되는 Flo1p 응집 functional domain은 세포의 flocs로의 가역적인 응집을 유발하면서 α-mannan carbohydrates와 같은 세포벽 성분과 비공유결합을 한다. 한외여과한 유청을 농축, 분무건조한 유청막투과액(Whey Permeate, WP)을 이용하여 β-galactosidase 재조합 Pichia pastoris (P. pastoris) 로 표층 발현 처리 (surface engineering)하는 GOS의 합성법은 폐기물을 활용하는 새로운 효율적인 방법이라 할 수 있다.

Effect of Live Yeast and Mannan-oligosaccharides on Performance of Early-lactation Holstein Dairy Cows

  • Bagheri, M.;Ghorbani, G.R.;Rahmani, H.R.;Khorvash, M.;Nili, N.;Sudekum, K.-H.
    • Asian-Australasian Journal of Animal Sciences
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    • 제22권6호
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    • pp.812-818
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    • 2009
  • This study evaluated the effects of live yeast and yeast cell-wall mannan-oligosaccharide supplementation onperformance and nutrient digestibility during early lactation in cows fed a diet based on a mixture of corn silage and alfalfa hay as forage sources. Eight multiparous Holstein dairy cows (average days in milk, 27${\pm}$6) were used in a replicated 4${\times}$4 Latin square design. Diets contained 45% forage and 55% concentrate on a dry matter (DM) basis and treatments were: i) basal diet without additive (Control), ii) basal diet with 32 g/d of mannan-oligosaccharides (MOS), iii) basal diet with $1.2{\times}10^{10}$ colony forming units per day (cfu/d) of live yeast (Saccharomyces cerevisiae CNCM 1-1077; SC), and iv) basal diet with a mixture of MOS (32 g/d) and SC ($1.2{\times}10^{10}$ cfu/d; MOS+SC). Treatments had no effect (p>0.05) on DM intake and yields of milk, 3.5% fat-(FCM) and energy-corrected milk (ECM), and on milk fat percentage, body condition score and blood metabolites. Compared with the Control, only supplementation of SC resulted in numerically higher yields of FCM (41.9 vs. 40.1 kg/d) and ECM (41.8 vs. 40.3 kg/d), and milk fat percentage (3.64 vs. 3.43%). While the MOS diet had no effects on performance compared to the Control, the combination treatment MOS+SC increased milk protein percentage (p<0.05). Also, the MOS supplementation, both alone or in combination with SC, numerically increased milk fat percentage. The SC supplementation increased apparent digestibility of DM and crude protein while the MOS supplementation did not affect digestibility. Concentrations of total volatile fatty acids (VFA) and ruminal pH were similar across treatments. Overall results indicated that supplementation of MOS produced variable and inconsistent effects on rumen metabolism and performance, whereas SC supplementation improved nutrient digestibility and numerically increased FCM and ECM yields, which could not be enhanced by the combined supplementation of MOS+SC. According to our experimental condition, there was no effect of MOS alone or in combination with SC on dairy cow performance.

복분자주에서 분리한 Mannan 다당의 면역증진 활성 (Immuno-stimulating Activities of Mannose-rich Polysaccharides Isolated from Korean Black Raspberry Wine)

  • 이호
    • 한국식품과학회지
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    • 제44권3호
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    • pp.343-349
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    • 2012
  • 한국 전통발효음료 중에 존재하는 특이 다당류의 화학적 특성 및 생물활성을 규명할 목적으로, 농가에서 직접 발효한 복분자주로부터 다당류를 분리하고 이들의 각종 면역증강활성에 대해 검토하였다. 복분자주에 80% ethanol 침전을 행하여 얻어진 조다당획분 RB-0를 이용, 연속적인 3회의 column chromatography를 행하여, 복분자주의 주요 다당인 RB-1b-I으로 정제할 수 있었다. RB-1b-I획분은 HPLC상에서 대칭을 유지하는 단일 peak로 검출되었으며, 분자량은 약 180 kDa으로 평가되었다. 정제다당인 RB-1b-I의 구성당 조성을 확인한 결과, mannose가 76.8%로 주를 이루고 있었으며, 그 외에 galactose(15.8%), arabinose(3.8%), glucose(2.6%) 및 rhamnose(1.2%)의 순으로 함유되어 있었다. 이러한 결과는 복분자 중에 존재하는 주 다당이 발효 효모의 세포벽에서 기원한 mannan임을 추정하게 하였다. 한편 복분자주에서 정제한 다당 RB-1b-I은 in vitro상에서 macrophage의 활성화를 높은 비율로 유도하였으며, 비장세포에 대해 높은 증식능을 보였다. 또한 RB-1b-I을 정맥 투여한 경우, NK cell을 활성화하여 YAC-1 종양세포에 대한 세포독성을 증가시킴이 관찰되었다. 한편 고분자 정제 다당인 RV-1b-I은 비특이적 면역계에 있어 중요 역할을 담당하고 있는 보체계에 대하여 농도 의존적인 활성화 경향을 보였다. 이들은 Ca++ 이온이 제거된 상태에서의 항보체 활성과 antihuman C3를 이용한 2차원 면역전기영동에 의하여 C3 산물을 동정한 결과로부터 보체계의 classical pathway와 alternative pathway양 경로를 모두 경유하여 활성을 나타냄을 확인할 수 있었다. 이상의 결과로부터 복분자주에는 인체 건강에 유익한 면역증진 활성을 제공하는 다당류가 함유되어 있음을 알 수 있었다.