• 한국자원식물학회지
• /
• 제25권6호
• /
• pp.664-669
• /
• 2012

The mushroom Coriolusversicolor contains biologically active polysaccharides, most of which belong to the ${\beta}$ glucan group. Diverse physicochemical properties, due to different sources and isolated types of ${\beta}$-glucans, may induce distinct biological activities. Here, we examined the effects of ${\beta}$-glucan from Coriolusversicolor (CVG) on the scavenger receptor B1 (SR-B1) expression and the role of SR-B1 in CVG-induced phagocytosis regulation by using SR-B1-specific shRNA transfected cells. We also examined whether Dectin-1 and CK2 are involved in SR-B1 expression in CVG-treated cells. Our study results showed that CVG increased the SR-B1 expression via Dectin-1 and CK2 in macrophages. However, the inhibition of SR-B1 expression by shRNA did not completely eliminate the effect of CVG on the increase of phagocytosis suggesting that SR-B1 is not essential for CVG-stimulated phagocytosis. This study will contribute to identify CVG's mechanism of action and its use in the development of functional foods.

• Asian-Australasian Journal of Animal Sciences
• /
• 제15권3호
• /
• pp.326-329
• /
• 2002

A population of exotic Holstein Friesian, Jersey, their crossbreds and the indigenous Murrah breed of buffalo bulls (n=486), used in artificial insemination breeding program were screened for the allelic distribution of the ${\kappa}$-casein and ${\beta}$-lactoglobulin genotypes. The preferred "B" allele frequency was highest in Murrah buffalo bulls followed by Jersey and Holstein Friesian. The increase in this particular allele frequency in the Holstein Friesian crossbred bulls was more when compared to their Jersey counterparts. Hardy-Weinberg's equilibrium was maintained albeit with some deviations, which was higher in crossbreds than in purebreds. The feasibility of using such large-scale molecular diagnostic tools in the field and their significance with regards to the dairy economy is discussed.

• 한국축산식품학회지
• /
• 제39권5호
• /
• pp.725-741
• /
• 2019

In the current study, we first investigated a method for directly transforming lactose into galacto-oligosaccharides (GOS) for manufacturing low-lactose and GOS-enriched skim milk (GSM) and then evaluated its prebiotic potential by inoculating five strains of Bifidobacterium spp. In addition, fermented GSM (FGSM) was prepared using a potentially probiotic Lactobacillus strain and its fermentation characteristics and antioxidant capacities were determined. We found that GOS in GSM were metabolized by all five Bifidobacterium strains after incubation and promoted their growth. The levels of antioxidant activities including radical scavenging activities and 3-hydroxy-3-methylglutaryl-CoA reductase inhibition rate in GSM were significantly increased by fermentation with the probiotic Lactobacillus strain. Moreover, thirty-nine featured peptides in FGSM was detected. In particular, six peptides derived from ${\beta}$-casein, two peptides originated from ${\alpha}s_1$-casein and ${\kappa}$-casein were newly identified, respectively. Our findings indicate that GSM can potentially be used as a prebiotic substrate and FGSM can potentially prevent oxidative stress during the production of synbiotic fermented milk in the food industry.

• 한국동물번식학회:학술대회논문집
• /
• 한국동물번식학회 2003년도 학술발표대회 발표논문초록집
• /
• pp.43-43
• /
• 2003

This study was conducted to produce transgenic pig harboring human tissue plasminogene activator (tPA) gene. Two different tPA genes containing bovine $\beta$-casein promoter and mouse uroplakin promoter were prepared for microinjection and confirmed the expression level of tPA protein from the CHO (Chinese hamster ovary) cell lines by gene transfection. Concentration of tPA expression from the six cell lines (all of CHO cells) were average 212.4 ng/ml. Reconstructed DNA to used the CHO cell were microinjected into the pronuclei of in vivo embryos The total of 2,307 zygotes were collected from 95 donors and 1,851 embryos were in 1-cell stage which were visualized the pronuclei for DNA microinjection. The concentration of linear DNA was 2.0 ng per microliter and injected into zygotes with two pronuclei on an inverted Nikon microscope equipped with narishige micromanipulator and modulation contrast optics. The 541 embryos injected with bovine $\beta$-casein promoter-tPA were transferred to 22 recipients. The 1,154 embryos injected with mouse uroplakin promoter-tPA were transferred to 51 recipients. Sixty nine offspring from 9 delivered sows were produced. We analysed the transgenes with PCR methods from 69 offsprings, but could not detect the PCR product from piglet tails DNA.

• Asian-Australasian Journal of Animal Sciences
• /
• 제5권2호
• /
• pp.285-294
• /
• 1992

Biochemical polymorphisms of sow's milk proteins, $\beta$-casein ($\beta$-CN), $\beta$-lactoglobulin ($\beta$-LG), post-lactoglobulin (post-LG), $\alpha$-lactalbumin ($\alpha$-LA) and X-protein, as genetic markers for major pig breeds (Landrace, Yorkshire, Duroc, Hampshire and cross bred) in Korea were determined by starch gel electrophoresis. Phenotype and gene frequencies at all marker loci were estimated and genetic differences among breed populations were analyzed. Three $\beta$-CN phenotypes (AA, AB and BB) controlled by two codominant alleles (${\beta}-CN^A$ and ${\beta}-CN^B$), four $\beta$-LG phenotypes (AA, AC, $AC^{\pm}$ and CC) controlled by two codominant alleles (${\beta}-LG^A$ and ${\beta}-LG^C$) and ten X-protein phenotypes (AA, BB, CC, DD, AB, AC, AD, BC, BD and CD) controlled by four codominant alleles ($X^A,\;X^B,\;X^C\;and\;X^D$) were identified. In addition, a genetically controlled polymorphism of post-LG was found for the first time in sow's milk protein. Three different phenotypes (AA, AB and BB) were designated $post-LG^A$ and $post-LG^B$. Of the five marker loci examined, $\alpha$-LA locus was observed to lack any individual variation in all breeds studied. All populations were in Hardy-Weinberg equilibrium for all loci. There were marked breed differences for phenotype and gene frequencies in the post-LG and X-protein marker loci. However, there were little differences between breeds in the gene frequencies at the $\beta$-CN and $\beta$-LG marker loci.

• 한국축산식품학회지
• /
• 제21권1호
• /
• pp.56-63
• /
• 2001

In this study, three domestic and one foreign formulas for the infants up to 5 month old were examined to detect chemical changes such as pH, reactive sulfhydryl groups(RSH) content, 5-hydroxymethylfurfral(HMF) content, available lysine content, electrophoresis, and surface color caused by heat treatment for long term storage. In the SDS-polyacrylamide gel electrophoresis, A and B products showed similar pattern, while C product had a clearly distinguishable $\beta$-lacto-globulin band, but in casein, only D product showed a few strong casein band. RSH content, which indicate the extent of whey protein denaturation, ranged from 4.40 to 5.93 mmole/g protein. HMF content. which indicate the extent of Maillard reaction, ranged from 192 to 432 $\mu$mole/100g in formulas. B product showed the highest RSH and HMF content. Available lysine content ranged from 31 to 46 mg/g protein. Among them D product contain the highest available lysine content and others showed no significant difference. In conclusion, the domestic infant formulas showed higher RSH and HMF content than the foreign product and the available lysine content of the domestic products were lower than of the foreign product.

• 한국식품영양과학회지
• /
• 제12권2호
• /
• pp.122-136
• /
• 1983

식용유 , 카제인 및 칼슘, 마그네슘 첨가식이가 토끼의 혈청 cholesterd치에 미치는 영향을 구명하기 위하여 단백질 68.47%, 탄수화물 15.35%, 지방 16.18%, 비타민 A, D, E, C, $B_1$, $B_2$, $B_{12}$, Niacin 등이 포함된 기본사료에 식물성식용유 10%, 카제인 10%, 칼슘, 마그네슘 일정량을 첨가한 사료를 급여하면서 체중변화 및 혈청내의 각종 성분을 조사한 결과는 다음과 같다. 1. 체중증가는 대조군에 비하여 식물성 기름만을 첨가한 군에서는 모두 낮았으나, 참깨기금과 들깨기름에 카제인을 더 첨가한 군에서는 체중증가가 좋았고, 한편 칼슘과 마그네슘을 더 첨가하여 사육한 군에서는 모든 군이 대조군보다 성적이 좋았다. 2. 실험식이 급여 기간에 식이효율, 단백질효율 및 열량효율 등은 들깨기름 첨가군에서 양호하였고, 특히 여기에 칼슘을 첨가한 군에서는 더욱 양호하였다. 3. 혈청 총단백질량은 모든 군에서 별 차이가 없었으나 혈청알부민에 있어서는 카제인을 첨가군이 높았고, ${\alpha}$-글로불린에 있어서는 같은 경우 칼슘 첨가군에서 낮았다. 그러나 들깨기름 첨가군과 여기에 카제인을 첨가한 군에서 가장 높았다. 4. 리포알부민은 모든 실험군에서 큰 차이가 없었으나 콩기름과 칼슘을 첨가한 군에서 낮았다. 그러나 콜레스테롤 함량이 많은 식이군에서 베타리포단백질의 양이 증가하였으나, 들깨기름을 첨가한 군에서 낮았다. 한편 배타리포단백질과 리포알부민의 비는 첨가식이 조성에 따라 0.11~0.26 범위에 있었다. 리포알부민과 리포단백질의 비는 칼슘과 콩기름을 첨가한 군의 값이 크고, 마그네슘과 들깨기름을 첨가한 군의 값이 작았다. 5. 트리글리세리드의 경우에는 참깨기름과 들깨기름을 첨가한 군에서 대조군보다 높은 값을 나타냈으나, 여기에 카제인, 칼슘 및 마그네슘을 더 첨가한 군에서 현저히 저하되었다. 6. 콜레스테롤의 경우에는 식물성기름을 첨가하여 사육한 실험군과 여기에 카제인을 더 첨가한 군에서는 트리글리세리드 함량이 높을 경우 콜레스테롤 함량도 증가하였으나, 콩기름과 칼슘, 들깨기름과 마그네슘을 첨가한 군에서 콜레스테롤량이 현저하게 낮았다. 7. 기본식이에 칼슘을 첨가한 군에 있어서는 혈청칼슘의 양이 증가되었으나 마그네슘의 경우는 낮았다. 혈당치의 경우는 식물성기름을 첨가군에서는 다소 감소되었고, 여기에 칼슘을 첨가한 군에서는 증가하고 마그네슘을 첨가한 군에서는 감소하였다. 8. 실험군별 분석치간의 상관관계는 베타리포단백질, 칼슘, 마그네슘 및 트리글리세리드간에는 상관계수 $${\gamma}{\sim_=}1$$을 보였다. 이상의 결과로부터 토끼의 혈청콜레스테롤의 양을 감소시킬 수 있는 인자로서 트리글리세리드와 베타리포단백질량을 감소시킬 수 있는 불포화도가 큰 들깨기름과 칼슘과 마그네슘이 2:1의 범위를 벗어나지 않은 조성식이가 좋은 것을 알았다.

• 한국가축번식학회지
• /
• 제20권4호
• /
• pp.371-378
• /
• 1997

본 연구는 인체 락토페린(hLF)을 우유 중으로 생산하는 형질전환 젖소의 개발에 관한 것이다. 이를 위한 모델 시스템으로서 락토페린 cDNAdhk 소의 베타-카제인 프로모터를 이용하여 형질전환 생쥐를 개발하였다. 발현 벡터의 락토페린에 대한 발현효율을 증가시키기 위하여 2개의 재조합 인트론을 삽입하였다. 20계통의 형질전환 생지를 개발하였는데 유즙에서의 락토페린 발현량은 1~200$\mu\textrm{g}$/ml이었다. hLF RNA의 발현 양상을 유선조직을 포함하여 뇌, 신장, 간 조직 등에서 조사하였을 때, 오직 유선에서만 발현되었을 뿐 아니라 엑손/인트론 경계 부위에서 정확하게 splicing되었다. hLF를 생산하는 형질전환 젖소를 개발하기 위하여 위에서 기술한 DNA를 소의 수정란에 미세주입한 후, 외과적 또는 비외과적 방법으로 대리모에 이식하였다. 한편, DNA가 주입된 수정란의 상태가 임신율에 미치는 영향을 조사하였다. 수정란을 최우수, 우수, 보통 등 3등급으로 나누었을 때, 각각의 임신율은 38.9, 15.4, 14.3%로 나타났다. 현재까지 유전자가 주입된 수정란을 대리모에 이식하여 태어난 35마리의 송아지 중, 30마리는 형절전환되지 않았으며 나머지는 현재 분석 중에 있다. 이상의 결과로 본 연구자들은 DNA가 미세주입된 젖소 수정란의 배양과 이식에 필요한 제반 기술을 확립하였으며, 아울러 임신율에 영향을 주는 여러 인자들에 대한 연구도 함께 조사하였다.

• 한국발생생물학회:학술대회논문집
• /
• 한국발생생물학회 2003년도 제3회 국제심포지움 및 학술대회
• /
• pp.86-86
• /
• 2003

Research has been in progress for more than a decade to production of useful proteins by genetic modification in cattle. However, the levels of protein production in transgenic cattle have been reported very low. To enhance protein production in transgenic animal, we tried homologous recombination to donor cells for production of transgenic clone cattle through nuclear transfer procedure. Thus, we constructed the two targeting vectors of human thrombopoietin (TPO) at bovine $\beta$-casein locus using homologous recombination with 13.6 kb and 9.6 kb homology. In two targeting vectors, positive selection was through the neomycin resistance gene and negative selection was by the diphtheria toxin (DT). Gene targeting was attempted in bovine embryonic fibroblasts (bEF) and bovine ear skin fibroblasts (bESF). To determine the most appropriate concentration of neomycin for bEF and bESF, G4l8 resistance was confirmed by culturing the cells in various concentrations of the drug and both of the cells were optimally selected at $900 \mu g/ml$ of neomycin. The transfected bEF and bESF by the targeting vectors were colonized efficiently at the ratio of DNA to transfection reagent such as $4 \mu g$:2 ${mu}ell$ and $1 \mu g$:$2 \mu l$. Comparing number of healthy clones from passage 4 to passage 8, bESF (17%) persist in culture for much longer than bEF (6%). The two gene-targeted bESF clones of 30 random-integrated clones with 9.6 kb homology length were confirmed, however, nothing was out of 72 random integration clones with 13.6 kb homology length, The DT also worked more efficiently in clones transfected with the vector of 9.6 kb homology length. Our data suggests that the choice of donor cell for long culture period should be considered to obtain targeted cell clone, and the gene-targeting frequency and the DT working efficiency are dependent on the length of target homology.

• 한국동물번식학회:학술대회논문집
• /
• 한국동물번식학회 2004년도 춘계학술발표대회
• /
• pp.190-190
• /
• 2004

Tissue plasminogen activator (tPA) plays important roles in the brain after excitotoxic injury. This study was conducted to produce transgenic pig harboring human tissue plasminogene activator (htPA) gene. Recombinent htPA(rhtPA) genes containing bovine-β-casein promoter (bBC) were prepared for microinjection and testified the expression level of htPA protein from the Chinese hamster ovary (CHO) cell lines before NDA microinjection into the porcine pronuclei. (omitted)