This study analyzed the correlation between carcass traits of Hanwoo steers and feeding methods (concentrate feed and total mixed ration for ruminants). The results indicated that in the feeding system using concentrate feed, the variation in carcass weight and marbling score among individual animals within farms tended to affect the average carcass sale price, with both showing negative effects (p=0.057, p=0.053). The standardized regression coefficients were used to compare the influence of each variable, revealing that the coefficients for carcass weight variation and marbling score variation were –0.38 and –0.30, respectively, indicating a greater influence of carcass weight variation. Therefore, reducing the variations in carcass weight and marbling score among steers in farms using concentrate feed is likely to increase the average carcass sale price. In the case of farms using total mixed ration (TMR) for ruminants, the variation in marbling score among individual animals significantly affected the average carcass sale price, showing a negative effect (p=0.002). Thus, reducing the variation in marbling score among steers in TMR farms is likely to increase the average carcass sale price. In summary, the coefficient of variation of marbling score was found to have a significant impact on the average carcass sale price of the farm. In farms using concentrate feed, the variations in both carcass weight and marbling score tended to affect the average carcass sale price (0.05<p<0.1). Meanwhile, in farms using TMR, the variation in marbling score had a significant impact. In conclusion, the coefficient of variation for marbling score in carcass performance was found to have the most significant impact on the average carcass sale price for both feeding types (concentrate and TMR diets). Furthermore, reducing the variation along with carcass weight of Hanwoo steers on concentrate feed may be a way to increase farm income.

This study identified single nucleotide polymorphisms (SNPs) that affect the body weight of chickens. Analysis of body weight showed that the Cornish breed had the highest body weight, and the Korean native chicken (Gray Brown) had the lowest body weight. TSH is composed of an α-subunit and a β-subunit, and the TSH-β gene encoding the β-subunit has been reported to be associated with obesity. In chickens, it is located on chromosome 26 and is reported to be associated with growth. The calcium-sensing receptor gene (CaSR) plays a role in the regulation of extracellular calcium homeostasis and is responsible for calcium absorption in the urinary tract, which affects the eggshell quality in poultry. It was shown that TSH-β was strongly correlated with weight in Cornish and Korean native (Gray Brown) chickens, particularly in those with the CC trait. However, CaSR showed no association with body weight in poultry; it was associated with calcium and the eggshell. Thus, selection for TSH-β can be used to produce individuals with more favorable traits in terms of body weight.

Sperm cryopreservation is an important method of assisted reproductive techniques and storing genetic resources. It plays a vital role in genetic improvement, livestock industrial preservation of endangered species, and clinical practice. Consequently, the cryopreservation technique is well organized through various studies, especially on Korean native cattle (Hanwoo). However, the cryopreservation technique of Korean native brindled cattle, which is one of the native cattle species in Korea, is not well organized. Therefore, it is necessary to develop a Supplementary Table technique for the cryopreservation of Korean native brindled cattle. For this purpose, it is important to first evaluate the quality of the currently produced cryopreserved sperm of Korean native brindled cattle. In this study, we randomly selected 72 individual Korean native brindled cattle semen samples collected from 8 different region research centers and used them to evaluate sperm functions. We focused on the quality evaluation of cryopreserved Korean native brindled cattle semen following the measurement of motion kinematics, capacitation status, intracellular ATP level, sperm motility, and cell viability. Then, the values of each of the eight groups were derived from various sperm parameters of nine individual samples, including sperm motility, kinematics, cellular motility, and intracellular ATP levels, which were used to compare and evaluate sperm function. Overall, differences in various sperm parameters were observed between most of the research centers. Particularly, the deviations of motility and motion kinematics were high according to the sample. Therefore, we suggest that it is necessary to develop a standard method for the cryopreservation of Korean native brindled cattle semen. We also suggest the need for sperm quality evaluation of the cryopreserved semen of Korean native brindled cattle before using artificial insemination to attain a high fertility rate.

In recent years, various methods of measuring body temperature have been developed using wireless biosensors to facilitate an early detection of pregnancy and parturition in cows. However, there are no studies on real-time monitoring of cattle body temperature throughout pregnancy. Therefore, we investigated the daily mean ruminal temperature in pregnant cows throughout pregnancy using a ruminal bio-capsule sensor and then evaluated the temperature variation between pregnant and non-pregnant cows. In pregnant cows, the mean and standard deviation of ruminal temperature was 38.86 ± 0.17℃. Ruminal temperature in pregnant cows slowly decreased until 180 to 190 days after artificial insemination and after that, the temperature increased dramatically until just before parturition. Furthermore, the means ruminal temperature was significantly different between pregnant and nonpregnant cows. The mean and standard deviation of ruminal temperature were as follows: 38.68 ± 0.01℃ from days 80 to 100, 38.78 ± 0.02℃ from days 145 to 165, 38.99 ± 0.45℃ from days 200 to 220, 39.14 ± 0.38℃ from days 250 to 270 before parturition. Therefore, our results could provide useful data for early detection of pregnancy and parturition in Korean cows.

This study was a report on 60 heads of Hanwoo steers(5 treatments⨯4 heads⨯3 repeats). Their start weights were 361.2±14.39 kg to 380.5±27.33 kg; 12.7 to 13.6 months of age. The aim was to investigate the effect of herbal probiotic supplementation on the weight, blood composition, meat quality and immunity in beef. In case of body weight gain, con. 1 plot(183.8 kg) in the early fattening stage, T3 plot(115.1 kg) in the middle fattening stage, and T2 plot(163.3 kg) in the late fattening stage significantly increased(p<0.05). There was a statistically significant difference in the blood content of T-Cho and IgG: con. 1 plot and T1 plot in the early fattening stage, T3 plot and T2 plots in the middle fattening stage, and con. 2 plot and T1~T3 plots in the late fattening stage had higher blood content than that of other treatment plots (p<0.05). In addition, the carcass weight was highest in the T1 plot and T2 plot among the total treatment plots(p<0.05). However, no statistical significant difference was observed in the different treatments; all individual treatment plots(T1~T3 plots) were somewhat higher than the control plots(con. 1~con. 2 plots) with respect to the carcass quantity and carcass quality. Combining and analyzing all results revealed that the dietary addition of herbal probiotics for Hanwoo steers had a positive effect on the improvement of weight, amount of meat, meat quality and immunity

본 연구는 돈육 중의 후지육을 이용하여 천연향신료인 생강 및 인삼분말을 첨가비율별로 처리(무처리 대조구), T1구(A-생강분말 0.1%첨가, B-인삼분말 0.1%첨가), T2구(A-생강분말 0.2%첨가, B-인삼분말 0.2%첨가), T3구(A-생강분말 0.3%첨가, B-인삼분말 0.3%첨가)하여 총 24점(4처리×2요인×3반복)의 돈육포를 제조한 후 저장기간에 따른 육포의 물리화학적 특성을 조사하였다. 돈육포의 수분활성도는 0.66∼0.80 정도였고, pH는 5.42∼5.75 범위로서 저장기간이 경과함에 따라 감소하여 통계적인 유의차를 나타내었다(p<0.05). 적색도(a값)에서는 대조구와 T1구가, 황색도(b값)은 T3구가 타 처리구보다 크게 높았다(p<0.05). 돈육포의 물성(texture)의 경우, 경도, 응집성 및 파쇄성은 대조구가 처리구보다 더 높았으나 검성과 탄력성의 경우에는 상반되게 오히려 더 낮게 나타났다. 총 유리아미노산은 처리구가 대조구보다 높은 경향이었고, 그 중에서도 T3-B구(50.06%)가 가장 높게 나타났다.

본 시험은 맥섬석과 한약제재 첨가급여가 한우거세우의 비육능력 및 혈액성상에 미치는 영향을 구명하기 위해 생후 13개월령의 거세한우 40두(4처리×5두×2반복)를 공시하여 사료용 첨가제로 1일 사료급여량의 0.5∼1.0% 수준으로 26개월령까지 시험하였다. 시험구 배치는 C(무첨가), T1구(맥섬석 0.5% 첨가), T2구(한약제재 0.5% 첨가), T3구(맥섬석 0.5%+한약제재 0.5% 첨가)로 구분하였다. 증체량의 경우 비육전기때 T1구(226.2kg)가, 비육후기 때는 T3구(162.1kg)가 가장 높게 나타났다(p<0.05). 혈중 총콜레스테롤 함량은 T3구가 다른 처리구보다 유의적으로 높았다(p<0.05). 또한 도체중은 T3구(439.00kg) > T2(425.80kg) > T1(420.50kg) > Control(413.00kg) 순으로 낮아졌다. 배최장근 단면적은 T3구가 107.00㎠로 다른 처리구보다 높았고(p<0.05), 도체등급에서 육질등급은 T2구와 T3구가 공히 3.25로서 크게 높았다(p<0.05). 한편 등심육의 지방산 조성에서 oleic acid 함량이 48.55∼50.90%로서 가장 많은 비율을 나타내었고, 불포화지방산은 T3구(57.94%)가 다른 처리구보다 유의적으로 높게 나타났다(p<0.05). 따라서 거세한우에게 각각 맥섬석과 한방제재를 혼합하여 첨가급여하면 도체등급, 관능검사 및 불포화지방산의 개선에 도움이 될 것으로 판단된다.

Calcineurin-binding protein 1 (Cabin1) regulates calcineurin phosphatase activity as well as the activation, apoptosis, and inflammatory responses of fibroblast-like synoviocytes (FLSs), which actively participate in the chronic inflammatory responses in rheumatoid arthritis (RA). However, the mechanism of action of Cabin1 in FLS apoptosis is not clear. The aim of this study was to define the regulatory role of Cabin1 in FLSs of mice with collagen-induced arthritis (CIA). Transgenic mice overexpressing human Cabin1 in joint tissues, under the control of a type II collagen promoter, were generated. hCabin1 expression in joints and FLSs was determined by reverse transcriptase-polymerase chain reaction (RT-PCR) and Western blot analysis. The expression of cytokines, matrix metalloproteinases (MMPs), and apoptosis-related genes in FLSs was determined by enzyme- linked immunosorbent assay, gelatin zymography, and RT-PCR, respectively. Joints were histologically examined after H&E and TRAP staining. hCabin1-transgenic CIA mice had less severe arthritis than wild-type CIA mice, based on hind paw thickness and histology. This was accompanied by significantly enhanced apoptosis in transgenic mice, evidenced by significantly more TUNEL-positive cells in synovial tissues. The expression of inflammatory cytokines and MMPs was reduced, and the transgenic CIA mice exhibited decreased Akt activation and increased expression of p53, caspase-3, caspase-9, and Bax. hCabin1 plays a critical role in promoting apoptosis of FLSs and in attenuating inflammation and the destruction of cartilage and bone in RA. These findings help elucidate the pathogenic mechanisms of RA and suggest that Cabin1 is a potential target for RA treatment.

alcineurin (CN) is a calcium and calmodulin-depedent serine/threonine phosphatase. CN plays an important role in various biological processes including cell proliferation, cardiovascular, skeletal muscle development and apoptosis. In rheumatoid arthritis (RA), CN plays a role synoviocyte activation and arthritis progression. The selective inhibition of CN by the over-expression of CN-binding protein 1 (Cabin1). In the present study, joint restricted transgenic mice expressing the human Cabin1(hCabin1) were generated, driven by type II collagen promoter and efficiency of these mice was investigated by experimental arthritis. These transgenic mice successfully expressed hCabin1 in joint tissue as well as other organs like the liver, the heart, and the brain. The joint specific over-expression of hCabin1 reduced the disease severity during collagen-induced arthritis. In fibroblast-like synoviocytes (FLSs) from hCabin1 transgenic mice, the productions of these cytokines including, TNF-α, IL-1β and IL-6 were decreased and MMPs was also depressed in transgenic mice FLS. In addition, the expression of proapoptotic p53, p21, caspase-3, caspase-9 and Bax increased in transgenic mice, indicating that hCabin1 may induce FLS death by regulating the expression of Bcl-2, p53, p21, caspase-3, casepase-9 and Bax. It is expected that these findings will provide a more knowledge about the pathogenic mechanisms of rheumatoid arthritis and a potential animal model of the choronic inflammatory conditions, including atherosclerosis and transplantation.