• 대한지역사회영양학회지
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• 제13권6호
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• pp.912-921
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• 2008

This study was performed to examine if the effects of collagen supplementation from pork skin could improve the sex steroid hormone, serum lipid and skin crack in Korean middle-aged women. Middle-aged women (40-55 years) who were not diagnosed with any type of disease were included in this study and thirty subjects were randomly assigned to a control group (n = 15) or a collagen supplemented group (n = 15). The collagen supplemented group ingested collagen flour 2 g, 3 times a day for 12 weeks. We measured serum collagen, estrogen, estradiol, estriol, progesterone, total cholesterol, triglyceride, HDL-cholesterol and LDL-cholesterol concentration. The collagen supplementation group had significantly increased serum collagen (p < 0.05) compared with the control group. In addition, skin crack was improved. But, there were no differences for sex steroid hormone and lipid profile in control and collagen supplemented groups. The result of the present study demonstrated that supplementation of 6 g collagen per day for 12 weeks can give beneficial effects on skin crack reduction and serum collagen concentration.

• Clinical Nutrition Research
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• 제12권4호
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• pp.245-256
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• 2023

A randomized, double-blind, placebo-controlled trial was conducted to confirm whether collagen peptide supplementation for 12 week has a beneficial effect on body fat control in older adults at a daily physical activity level. Participants were assigned to either the collagen group (15 g/day of collagen peptide) or the placebo group (placebo drink). Body composition was measured by bioelectrical impedance analysis (BIA) and dual-energy X-ray absorptiometry (DEXA). In total, 74 participants (collagen group, n = 37; placebo group, n = 37) were included in the final analysis. The collagen group showed a significant reduction in total body fat mass compared with the placebo group, as evidenced by both BIA (p = 0.021) and DEXA (p = 0.041) measurements. Body fat mass and percent body fat of the whole body and trunk reduced at 12 weeks compared with baseline only in the collagen group (whole body: body fat mass, p = 0.002; percent body fat, p = 0.002; trunk: body fat mass, p = 0.001; percent body fat, p = 0.000). Total fat mass change (%) (collagen group, -0.49 ± 3.39; placebo group, 2.23 ± 4.20) showed a significant difference between the two groups (p = 0.041). Physical activity, dietary intake, and biochemical parameters showed no significant difference between the groups. The results confirmed that collagen peptide supplementation had a beneficial effect on body fat reduction in older adults aged ≥ 50 years with daily physical activity level. Thus, collagen peptide supplementation has a positive effect on age-related changes.

• 농업과학연구
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• 제46권3호
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• pp.559-567
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• 2019

This experiment was conducted to investigate the effects of pig skin collagen supplementation on growth performance, organ weight, blood characteristics, and intestinal microbiota in broilers. A total of 50 Ross 308 broilers were used for 2 weeks. The five dietary treatments were as follows: NC) basal diet, PC) NC + fish collagen powder 0.1%, T1) NC + pig skin collagen 0.1%, T2) NC + pig skin collagen 0.5%, and T3) NC + pig skin collagen 1.0%. The body weight gain (BWG), feed intake (FI), and feed conversion ratio (FCR) were not affected (p > 0.05) by the dietary treatments in this experiment. Additionally, there were no significant differences (p > 0.05) in the organ weights among the treatments. Broilers fed T1, T2 and T3 diets had higher (p < 0.05) white blood cell (WBC) counts than the broilers fed the NC and PC diets. The Lactobacillus counts in the excreta were improved (p < 0.05) in the broilers fed the T1 and T2 diets. Moreover, the Salmonella counts in the excreta were decreased (p < 0.05) in the broilers fed the PC and T1 diets. In conclusion, supplementation of pig skin collagen in diets improved the white blood cells (WBCs) in the blood and Lactobacillus counts in the excreta, and reduced the Salmonella counts in the excreta. However, when pig skin collagen was increased in the diets, there were no significant differences (p > 0.05). Therefore, the addition of 0.1% pig skin collagen in the feed provided beneficial effects on the blood characteristics and the intestinal microbiota environment.

• 동의생리병리학회지
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• 제21권1호
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• pp.111-116
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• 2007

The aim of this study was to evaluate the effect of Lycii fructus (LF) on serum lipid and the collagen content of the connective tissues in ovariectomized rats. From day 2 until day 37 after the ovariectomy, Sprague-Dawley female rats were randomly assigned to the following groups : sham-operated rat (Sham), ovariectomized control rat (OVX-control), and ovariectomized rats supplemented with the LF 50mg/kg bw/day (OVX-LF). The LF ethanol extract were orally administrated 1ml per day. Body weight gain was not significantly different in groups. Although total-cholesterol and triglyceride were increased in the ovariectomized control, supplementation with the LF extract decreased the levels. Moreover, the serum HDL-cholesterol levels were significantly increased after supplementation with the LF extract(p<0.05). Supplementation with the LF extract prevented a decrease in the collagen level in bone and cartilage tissues. These results are consistent with the conclusions based on the estrogenic activities of LF. Therefore, it may be used to possibly improve the quality of life in menopausal women.

• 생약학회지
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• 제37권4호
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• pp.324-330
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• 2006

The aim of this study was to evaluate the effects of Artemisia Princeps Var. Orientalis (AP) on serum lipids and the collagen content of the connective tissues in ovariectomized rats. From day 2 until day 37 after the ovariectomy, Sprague-Dawley female rats were randomly assigned to the following groups: sham-operated rats (Sham), ovariectomized control rats (OVX-control), and ovariectomized rats supplemented with the AP 50 mg/kg bw/day (OVX-AP). The AP ethanol extracts were orally administrated 1 mL per day. The OVX rats were significantly heavier than the sham-operated rats at all time points, but supplementation with the AP extracts tended to gain weight less than OVX-control. Although total-cholesterol was increased at OVX-control, supplementation with the AP extracts tended to result in less than OVX-control. Triglyceride was significantly decreased after supplemented with the AP extracts (p<0.05). HDL-cholesterol is appeared higher AP extracts group than OVX-control. According to the results, we could know the fact that AP extracts were effective on serum lipids content throughout decreasing total-cholesterol, triglyceride and increasing HDL-cholesterol in ovariectomized rats. Supplementation with the AP extracts prevented a decrease in the collagen level in bone and cartilage tissues. These results are consistent with the conclusions based on the estrogenic activities of AP. Therefore, it may be used to possibly improve the quality of life in menopausal women.

• 생명과학회지
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• 제18권11호
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• pp.1578-1583
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• 2008

폐경을 앞둔 여성에게는 폐경을 전후하여 지속되는 골 손실 가속화 등의 문제점을 가지고 있다. 그러므로 본 연구에서는 인위적 폐경을 유발시킨 난소 절제 쥐에서의 골 손실의 유무를 결합조직 중의 collagen 함량 변화를 통하여 그 효과를 검토하였다. 그 결과 생화학적 골 대사 지표인 혈 중 ALP 활성은 난소 절제(OVX-control)로 인하여 증가하는 반면, 난소 절제 후 다시마 추출물 투여(OVX-ST50, OVX-ST200)로 혈중 ALP 활성은 감소하는 경향을 보여 골 흡수를 저하시킬 수 있는 가능성을 나타내었다. 한편 난소 절제 후 collagen 함량이 감소하였으나, 다시마 추출물 투여에 의해 피부조직과 골.연골 조직에서 collagen 함량이 증가하는 경향을 보였고, 특히 OVX-ST200군은 각 조직 모두 OVX-control에 비하여 유의적으로 증가하였다(p<0.05). Collagen의 성숙 가교물질인 pyridinoline 함량 또한 난소 절제 후 골, 연골 조직 중에서 감소하였으나 다시마 추출물을 투여한 군에서 증가하는 경향을 나타내었다. 골에서의 deoxypylidinoline 함량은 난소를 절제하지 않은 Sham군이 OVX-control군에 비해서 유의적으로 높은 값을 나타냈고(p<0.05), 난소 절제 후 다시마 추출물을 농도별로 투여한 군(OVX-ST50 및 OVX-ST200)에서 유의 적으로 높은 값을 나타내어(p<0.05), 난소 절제 시 합성이 감소되는 deoxypyridinoline 생성량을증가시켰다. 에스트로겐 감소로 인한 결합조직 중 collagen 함량 저하가 다시마 추출물 투여에 의해 증가된 본 실험 결과로 미루어 보아 다시마 중의 phytoestrogen이 에스트로겐 유사효과를 나타냄을 알 수 있었다. 이상과 같이 폐경으로 인한 장애를 감소시키기 위하여 에스트로겐의 장기간 복용에 의한 부작용을 다시마 중의 phytoestrogen이 estrogen 대체 작용을 함으로써 그 부작용을 감소시켜 줄 것으로 사료되며, 이들의 구조 및 기전에 대해서는 앞으로 연구가 더 필요 한 것으로 생각된다.

• 한국식품영양과학회지
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• 제33권2호
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• pp.324-330
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• 2004

난소 절제시술 및 폐경으로 인한 여성 호르몬인 estrogen의 감소는 지속되는 골 손실 가속화 등으로 인한 골 질환의 문제점을 가지고 있다. 그러므로 본 연구에서 흰쥐의 난소를 절제하여 인위적인 폐경을 유도하여 골손실의 정도를 결합조직 중의 collagen 함량 및 collagen성숙가교인 pyridinoline함량을 측정하여 그 효과를 검토하였다 난소 절제 후 결합조직 중의 collagen함량은 연골과 피부에서 난소를 절제하지 않은 Sham군에 비하여 낮았으며, 김 추출물 투여군에서 유의적이지는 않으나 높은 경향을 나타내었다. 골 중 collagen성숙가교인 pyrldinoline 함량은 난소절제에 의해 감소하였으나 골에서는 김 추출물 투여에 의해 난소를 절제하지 않은 Sham군과 비슷한 수준으로 증가하였고, 연골에서는 김 추출물 투여에 의해 Sham군과 비슷한 수준으로 감소하는 경향을 나타내어 pyridinoline 생성에 유익한 효과를 나타내었다. 김 추출물이 collagen합성 및 성숙가교인 pyridinoline 생성을 회복시킨 본 실험의 결과로 보아 폐경기여성에게 김 추출물의 섭취는 폐경으로 인한 골손실을 감소시켜 줄 것으로 사료되어지며, 이러한 작용을 나타낸 김의 성분 및 그 기전에 대해서는 앞으로 더 많은 연구가 필요할것으로 생각된다.

• 생명과학회지
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• 제17권7호통권87호
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• pp.931-936
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• 2007

갱년기의 여성에는 여러 폐경 증후들이 나타나는데, 특히 에스트로겐의 감소로 인한 혈중의 지질 조성의 변화 등으로 인한 심혈관계 질환과 골 손실의 증가로 인한 골다공증의 위험성이 높아 이에 대한 예방 및 치료에 대한 연구가 활발히 이루어지고 있다. 따라서 본 연구에서는 쉽게 섭취 할 수 있으며,부작용이 없는 해조류인 청각 추출물을 난소제거술을 통한 갱년기 유도 흰쥐에 투여하여 결합조직 중의 collagen과 pyridinoline함량, 혈 중 ALP활성 변화를 통해 갱년기 장애 질환의 개선효과를 알아보았다. 청각 추출물이 골 노화에 미치는 영향을 실험 한 결과 난소 절제에 의한 골 손실에 의해 결합조직의 collagen 함량이 감소하였으나, 청각 추출물의 투여로 인해 증가하는 경향을 보였다. 따라서 청각 추출물이 에스트로겐 감소로 인해 저하되는 collagen 합성능을 회복 시켜 유익한 효과를 가지는 것으로 추측된다. 또한 골 및 연골조직에서 collagen 성숙가교인 pyridinoline 함량을 HPLC에 의해 측정한 결과, 연골 중 pyridinoline함량은 난소절제에 의해 감소되었으나 청각 추출물 투여로 인해 난소를 절제하지 않은 SHAM군과 비슷한 수준으로 증가하여 pyridinoline 생성에 유익한 효과를 나타내었다. 이상의 결과로부터 갱년기 장애 시 유발되는 골 노화에 청각 추출물이 유효한 효과를 나타낼 것으로 기대된다.

• 한국축산식품학회지
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• 제41권4호
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• pp.674-686
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• 2021

This study aimed to enhance the quality of broiler breast meat by adding pig skin collagen to feed. A total of 50 Ross 308 broilers were classified according to the following feeding regime for two weeks: basal diet (NC), basal diet+0.1% fish collagen (PC), basal diet+0.1% pig skin collagen (T1), basal diet+0.5% pig skin collagen (T2), and basal diet+1.0% pig skin collagen (T3). The moisture content was the highest in the PC group, and the protein content was the lowest in the T1 group (p<0.05). The fat content was higher in the T1 and PC groups, whereas the ash content was higher in the T3 group (p<0.05). Drip loss was the highest in the NC group and the lowest in the T2 group (p<0.05). Lightness was low in groups T2 and T3, redness was low in groups T2 and PC, and yellowness was low in groups T1, T2, and PC (p<0.05). The collagen content of the chicken breast was the highest in the T3 group, and that of the skin was the highest in the T1 group (p<0.05). The texture characteristics of springiness, cohesiveness, chewiness, and hardness were the highest in the T3 group (p<0.05). In conclusion, the supplementation of a broiler diet with pig skin collagen was found to increase the collagen content of the breast meat, indicating the improved quality of the broiler breast meat.

• Asian-Australasian Journal of Animal Sciences
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• 제8권6호
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• pp.577-582
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• 1995

Sixty ram lambs, weighting 23.5 kg, were randomly assigned in a $2{\times}3$ factorial arrangement of two dietary energy (high; 11.7 and low; 9.0 MJ ME/kg DM) and three levels of poultry offal meal supplementation (0, 5 and 10%). Lambs were fed ad libitum for 120-day before slaughter. At slaughter, half the lambs in each dietary treatment group were randomly selected for electrical stimulation of their undressed carcasses. The M. Biceps femoris pH and temperatures were monitored at 1, 3, 5, 8 and 24 h postmortem. At 24 h postmortem, the M. biceps femoris was removed from the fight side of each carcass and steaks were obtained for determination of Warner-Bratzler shear force, collagen content and collagen solubility. The results showed that temperature and pH values during the 24-h postmortem were consistently higher (p < .01) and lover (p < .01), respectively, for M. biceps femoris from lambs fed high energy diets than for those fed on low energy diets. Muscles from high energy fed lambs had lower (p < .01) shear force values and higher (p < .01) percent soluble collagen than for low energy fed lambs; total collagen content was not significantly influenced by dietary energy level. Increased the level of poultry offal meal supplementation in the diet to 10% was associated with concomitant increases (p < .01) in muscle tenderness and percent soluble collagen. Electrical stimulation (ES) of carcasses resulted in a lower shear force values for the M. biceps femoris than in non-stimulated carcasses (Non-ES); total collagen content and percent soluble collagen were not significantly affected by ES treatment.