• 한국미생물·생명공학회지
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• 제17권5호
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• pp.421-428
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• 1989

물성조정제로서 고전도의 다당류를 생산하는 토양세균을 분리 선발하여 동정한 결과 Pseudomonas delafieldii로 판단되었다. 이 세균의 증식을 위한 pH와 온도는 6.5 및 3$0^{\circ}C$이었다. 최대 비성장속도는 0.25 h$^{-1}$이며 염류배지에서 다당류의 비생산속도, 증식수율 및 다당류 생산수율은 6.25mg/g-cell/h, 54.5%, 38.39%이었다. 본 다당류는 포도당과 gluconolactone을 몰비로 1.9：1.0로 함유한 $\beta$-glucan 으로 추정되었으며 원인 분석결과 탄소 31.85% 수소 31.85% 수소 5.l5%를 함유하고 아세틸기를 1.35%가지고 있었으며 고유점도는 42.84dl/g, 분자량은 5.64$\times$$10^7$이었다.

• Journal of Microbiology and Biotechnology
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• 제20권2호
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• pp.438-445
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• 2010

The immunomodulatory effects of Aureohasidium pullulans SM-2001 exopolymers containing $\beta$-1,3/1,6-glucan were evaluated in cyclophosphamide (CPA)-treated mice. To induce immunosuppression, 150 and 110 mg/kg of CPA were intraperitoneally injected 3 days and 1 day, respectively, before beginning administration of the test material. Exopolymers were delivered subcutaneously or orally, four times, in a volume of 10 ml/kg at 12-h intervals beginning 24 h after the second CPA treatment. Changes in thymus and spleen weights, splenic amounts of tumor necrosis factor (TNF)-$\alpha$, interleukin (IL)-$1{\beta}$, and IL-10, and numbers of CD3+, CD4+, CD8+, and TNF-$\alpha+$ thymus and spleen cells were monitored in CPA-treated mice. As a result of CPA treatment, dramatic decreases in the number of CD3+, CD4+, CD8+, and TNF-$\alpha+$ cells were detected in the thymus and spleen, along with decreases in thymus and spleen weights. In addition, splenic TNF-$\alpha$, IL-$1{\beta}$, and IL-10 contents were also decreased on observation with flow cytometry. However, oral and subcutaneous treatments with exopolymers effectively reduced the immunosuppressive changes induced by CPA. Therefore, it is concluded that exopolymers of A. pullulans SM-2001 can effectively prevent immunosuppression through, at least partially, the recruitment of T cells and TNF-$\alpha+$ cells or enhancement of their activity, and can provide an effective component of prevention or treatment regimens for immunosuppression related to cancer, sepsis, and high-dose chemotherapy or radiotherapy.

• Asian-Australasian Journal of Animal Sciences
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• 제32권10호
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• pp.1548-1557
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• 2019

Objective: To investigate the effects of dietary supplementation with different levels and molecular weights of fungal ${\beta}$-glucan on productive performances, health, carcass traits and meat quality in broilers. Methods: Two hundred and ten of one-day-old chicks with equal sex were assigned to seven experimental groups in $2{\times}4$ factorial arrangement. These groups were supplemented with (0, 10, 30, and 60 ppm) of molecular weight 1-3, 1-6 ${\beta}$-glucan (low or high). High molecular weight ${\beta}$-glucan (H: 943 kDa) was obtained from Ophiocordyceps dipterigena BCC 2073, whereas H with ${\gamma}$-Irradiation treatment was performed to achieve low molecular weight ${\beta}$-glucan (L: 8 kDa). Results: There was no statistical significance in productive performances, apparent digestibility and interaction between fixed factors along 42 days of experiment (p>0.05). A higher caecal amylase activity was present in the group that received L, while there was a dramatic decrease in H and the control groups, respectively (p<0.05). The increase of supplemental dose increased caecal amylase activity (p<0.05). Immunomodulatory effects from L was revealed by the marked increase of phagocytic activity, relative weight of thymus and bursa of fabricius (p<0.05). Similarly, the additive dose at 30 ppm provided the same results, whereas the only significant difference with supplementation at 60 ppm was an increase in phagocytic activity (p<0.05). Interestingly, villi height of broilers fed L was higher than other groups (p<0.05). The treatments did not influence haematology, blood chemistry, antibody production level against vaccination, carcass traits and meat quality (p>0.05). Conclusion: The supplementation of L at 30 ppm was suggested to achieve benefits of immune modulation without adverse effects on other parameters.

• 한국어병학회지
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• 제21권3호
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• pp.219-228
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• 2008

The effects of dietary yeast β-glucan administration on growth, nonspecific immune responses, serum lysozyme, skin mucous lysozyme, NBT (nitroblue tetrazolium) reduction by phagocytes, and disease resistance against Edwardsiella tarda in Japanese eel, Anguilla japonica were evaluated. Fish were fed the diets supplemented with 0%, 0.1% and 0.5% of yeast β-glucan to a commercial diet for 6 weeks. The body weight gain from the fish fed on the 0.5% supplemented diet for 6 weeks was significantly higher than the control. Both serum and skin mucous lysozyme were significantly higher in the all experimental groups except 2 weeks of 0.5% group. The bactericidal activity of serum was slightly increased at 6 weeks. Also, The intracellular superoxide anion production of kidney phagocytes was significantly higher in the all experimental groups. The diet supplemented with 0.1% were also found to raise the relative percent survival (RPS) of Japanese eel after an artificial challenge with 1×107 cells of Edwardsiella tarda per fish. The results suggested the potential of yeast β-glucan to activate some innate immune responses and to improve the growth in Japanese eel.

• 한국자원식물학회지
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• 제12권2호
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• pp.102-106
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• 1999

1. 누에를 이용한 눈꽃동충하초 재배에서 종균접종은 누에 5령1일째 실시하였으며, 감염율은 72% 되었으며 2. 눈꽃동충하초 대량생산을 위한 인공재배 최적배지는 "현미80g+번데기가루20g" 처리구에서 자실체 길이 11.4cm,무게 51.6g, 짙노랑색으로 아주 양호했으며, 현미 처리구, 번데기+PDA처리구에서도 양호했음. 3.누에동충하초에서 발생된 눈꽃동충하초는 번데기 1마리당 1.2g(번데기포함), 길이 3.0~3.5cm정도 되었으며, 일부는 누에상태에서도 동충하초가 발생하였음. 4. $\beta$-glucan함량은 누에 5령 1일 접종 처리구가 40.5%로 가장 높고 저비용 배지인 현미 16.4%, 번데기 20.7%, 현미+번데기가루 23.1%, 소나무 톱밥+밀기울 28.7%로 $\beta$-glucan 함량이 높았다. 5. 지네, 굼벵이, 누에가루처리구에서는 균사생육이 부진하였고 분생포자만 발생하였다.

• 한국식품과학회지
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• 제47권4호
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• pp.438-445
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• 2015

L. plantarum K154 고정화와 C. lacerata 균사체 배양물을 이용한 혼합발효를 통해서 다당류, ${\beta}$-glucan과 같은 생리활성물질과 기능성 GABA 생산을 최적화 하고자 하였다. C. lacerata 균사체의 최적 배양 조건으로 glucose 3%, soybean flour 3%, $MgSO_4$ 0.15%를 혼합하여 배지로 사용하였고, 5 L jar fermentor를 이용하여 $25^{\circ}C$에서 7일간 진탕 배양하였다. 배양물은 균사체 함량 29.7 g/L, 다당류 함량 3.1 g/L, ${\beta}$-glucan 2% (w/w), protease 활성 68.96 unit/mL, ${\alpha}$-amylase 활성 10.37 unit/mL로 매우 높게 나타났다. C. lacerata 균사체 배양물을 이용하여 젖산세균 고정화에 의한 혼합발효물의 생균수를 측정한 결과, 배양 1일 째 비드 내에서 젖산세균의 수는 $3.13{\time}10^9CFU/mL$로 높게 나타났고, 배지에 유리된 젖산세균의 수는 배양기간 동안 $1.48{\time}10^8CFU/mL$로 유지하였다. 알지네이트 1.5%를 사용하여 비드를 제조하였을 때, GABA 함량을 측정한 결과 배양 7일 째 비드 내에서 6.30 mg/mL, 배지에서 9.96 mg/mL로 높게 나타났다. 젖산세균 고정화의 재사용 가능성을 확인하기 위해 고정화 비드를 5회간 재사용하여 $30^{\circ}C$에서 15일간 혼합발효한 결과, GABA 생산이 급격히 증가하여 배양 기간 동안 유지하였다. 결론적으로 C. lacerata 균사체 배양물로부터 고정화된 젖산세균을 이용한 혼합발효는 고농도 GABA를 포함된 기능성 소재를 생산할 수 있었으며, 이는 식품 및 생물 산업의 원료로 활용이 기대된다.

• Journal of Microbiology and Biotechnology
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• 제19권9호
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• pp.951-959
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• 2009

Most, if not all, Basidiomycetes mushrooms have biologically active polysaccharides showing potent antitumor activity with immunomodulating properties. These polysaccharides have various chemical compositions and belong primarily to the $\beta$-glucan group. In this study, the crude water-soluble polysaccharide HEF-P, which was obtained from the fruiting body of Hericium erinaceus by hot water extraction and ethanol precipitation, was fractionated by DEAE-cellulose and Sepharose CL-6B column chromatographies. This process resulted in four polysaccharide fractions, named HEF-NP Fr I, HEF-NP Fr II, HEF-AP Fr I, and HEF-AP Fr II. Of these fractions, HEF-AP Fr II was able to upregulate the functional events mediated by activated macrophages, such as production of nitric oxide and expression ofcytokines (IL-1${\beta}$ and TNF-${\alpha}$). The molecular mass of HEF-AP Fr II was estimated by gel filtration to be 13 kDa. Its structural characteristics were investigated by a combination of chemical and instrumental analyses, including methylation, reductive cleavage, acetylation, Fourier transform infrared spectroscopy (FT-IR), and gas chromatography-mass spectrometry (GC-MS). Results indicate that HEF-AP Fr II is a low-molecular-mass polysaccharide with a laminarin-like triple helix conformation of a ${\beta}$-1,3-branched-${\beta}$-1,6-glucan.

• 한국식품과학회지
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• 제44권1호
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• pp.41-47
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• 2012

본 연구에서 보리의 GABA 함량을 높일 수 있는 제조조건(수침과 발아)을 확립하여 GABA 고함유 발아보리를 제조하고, 발아에 의한 영양성분의 변화를 분석하였다. 수분흡수량과 수침용액의 pH는 수침 초기 6시간까지 급격하게 변화하였고, 보리종류 및 수침온도에 따라 약간의 차이를 나타내었다. 보리 원맥의 GABA 함량은 쌀보리 4.1 mg/100 g, 겉보리 1.4 mg/100 g 및 찰보리 2.5 mg/100 g이었으며, $25^{\circ}C$에서 24시간 수침 후에 쌀보리 10.4 mg/100 g, 겉보리 14.1 mg/100 g 및 찰보리 10.9 mg/100 g으로 증가되었다. 한편, 발아보리의 GABA 함량은 쌀보리 15.8 mg/100 g (48시간, $25^{\circ}C$), 겉보리 20.9 mg/100 g(36시간, $15^{\circ}C$) 및 찰보리 14.3 mg/100 g(36시간, $5^{\circ}C$)으로 보리 품종에 따라 발아조건은 다르게 나타났다. 수침과 발아 후에 원맥보다 쌀보리는 3.9배, 겉보리는 14.6배 및 찰보리는 5.8배 GABA 함량이 증가하였다. 발아에 의한 보리의 영양성분 변화는 일반성분에서 원백보다 조지방, 조회분, 무기질 및 ${\beta}$-glucan 함량은 감소하였으며, 지방산 조성에서 원백보다 linoleic acid는 증가하고 oleic acid는 감소하였다. 한편, 보리의 주요 지방산은 linoleic acid와 palmitic acid이었고, ${\beta}$-glucan 함량은 발아에 의하여 쌀보리 0.84배, 겉보리 0.94배 및 찰보리 0.94배 감소하였다.

• Asian-Australasian Journal of Animal Sciences
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• 제18권11호
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• pp.1634-1641
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• 2005

Generally, dietary fibre (DF) includes lignin, non-starch polysaccharides (NSP) and resistant starch (RS). In monogastric species, low levels of dietary fibre in the diet are associated with various diseases and high levels reduce nutrient digestibilities. In this study, the effects of different types and levels of NSP (soluble: $\beta$-glucan, insoluble cellulose) and resistant starch on mucin secretion and endogenous nitrogen and amino acid losses in pigs were investigated. A total of 25 five-week-old weaner pigs (9.5 kg${\pm}$1.5 kg), were randomly allocated to each of five experimental diets. Different levels of purified barley $\beta$-glucan (BG) extract (5 or 10% of $Glucagel^{(R)}$ $\beta$-glucan, providing 4 or 8% of BG in the diet), and resistant starch (RS) (8.3 or 16.6% of Hi-$Maize^{TM}$, providing 5 or 10% RS in the diet) were substituted for wheat starch in a purified diet in which enzymatically-hydrolysed casein was the sole source of protein. The diets were fed for 21 days. No statistically significant difference between treatments (p>0.05) was observed for growth performance and organs weights. No difference in ileal starch digestibility was observed between pigs on the cellulose or $\beta$-glucan diets. However, as the level of resistant starch in the diet increased the ileal starch digestibility decreased (p<0.05). The inclusion of resistant starch in the diet (5 or 10%) did not increase mucin production when compared with the cellulose-only diet. However, as the level of beta-glucan in the diet increased, both crude mucin in the digesta dry matter and per kg dry matter intake increased (p<0.05). Pigs fed the diet containing 8% of beta-glucan had higher endogenous loss flow than those fed the diets including 5 or 10% of resistant starch or 4% of $\beta$-glucan. In conclusion, dietary inclusion of resistant starch increased the level of starch reaching the large intestine without any effect on mucin secretion, or endogenous nitrogen or amino acid losses content in the small intestine. The addition of $\beta$-glucan to a diet containing cellulose increases both mucin secretion and endogenous amino acid and nitrogen losses in the small intestine.

• 한국가금학회지
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• 제43권3호
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• pp.159-167
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• 2016

A total of 528 broilers ($47{\pm}0.1g$; 1 day of age) were used in a 35-day feeding trial to evaluate probiotics, prebiotics and their interactive effects on growth performance, blood characteristics, relative organ weight and meat quality. Broilers were randomly distributed into 1 of 6 treatments on the basis of body weight (BW) (4 replicate pens per treatment, 22 broilers per pen). The dietary treatments were CON, basal diet; B, CON + 0.1 g kg-1 Bacillus subtilis; K, CON + 1 g kg-1 Kefir; G, CON + 1 g kg-1 ${\beta}-glucan$; GB, G + 1 g kg-1 Bacillus subtilis; and GK, G + 1 g kg-1 Kefir. The overall effects indicated that broilers fed the K, G and GK diets had greater body weight gain (BWG) than those fed the CON diet (P<0.05). The number of white blood cells increased (P<0.05) in the GB group compared with the CON, B and G treatments; however, the lymphocyte percentage in the B group was higher than in the G group. The weight of bursa fabricii was lower in the B and G groups compared to the K group (P<0.05), whereas a higher spleen weight was observed in chickens that were fed the GB and GK diets compared to the B group (P<0.05). The treatments did not affect the meat quality parameters, except for meat redness, which improved with all of the supplementation groups (P<0.05). The population of Lactobacillus spp. in gizzard was significantly higher in the K treatment compared with CON, B, G and GB. In conclusion, supplementation with kefir and ${\beta}-glucans$ improved growth performance.