• 제목/요약/키워드: C-telopeptide

검색결과 33건 처리시간 0.027초

Protective effect of dietary oils containing omega-3 fatty acids against glucocorticoid-induced osteoporosis

  • Elbahnasawy, Amr Samir;Valeeva, Emiliya Ramzievna;El-Sayed, Eman Mustafa;Stepanova, Natalya Vladimirovna
    • Journal of Nutrition and Health
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    • 제52권4호
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    • pp.323-331
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    • 2019
  • Purpose: Glucocorticoids (GCs) are implicated in secondary osteoporosis, and the resulting fractures cause significant morbidity. Polyunsaturated fatty acids (PUFAs) play a vital role in bone metabolism. However, few trials have studied the impact of omega-3 PUFA-containing oils against GC-induced osteoporosis. Therefore, the present study was undertaken to determine whether supplementation with omega-3 PUFA-containing dietary oils such as fish oil, flaxseed oil or soybean oil can impede the development of GC-induced osteoporosis. Methods: The fatty acids (FAs) content of oils was determined using gas chromatography. Male rats were subdivided into 5 groups (8 rats each): normal control (balanced diet), prednisolone control (10 mg/kg prednisolone daily), soybean oil (prednisolone 10 mg/kg + soybean oil 7% w/w), flaxseed oil (prednisolone 10 mg/kg + flaxseed oil 7% w/w), and fish oil (from cod liver; prednisolone 10 mg/kg + fish oil 7% w/w). Results: The study data exhibited a significant depletion in bone mineral density (BMD) and femur mass in the prednisolone control compared to the normal control, accompanied with a marked decrease in the levels of plasma calcium and 1,25-$(OH)_2$-vitamin $D_3$, and elevated levels of C-terminal telopeptide (CTX), tumor necrosis factor-alpha (TNF-${\alpha}$) and malondialdehyde (MDA). Supplementation with fish oil, soybean oil or flaxseed oil helped to improve plasma calcium levels, and suppress oxidative stress and inflammatory markers. Additionally, bone resorption was suppressed as reflected by the decreased CTX levels. However, fish oil was more effective than the other two oils with a significant improvement in BMD and normal histological results compared to the normal control. Conclusion: This study demonstrated that supplementation with dietary oils containing omega-3 PUFAs such as fish oil, soybean oil or flaxseed oil can play a role in the prevention of bone loss and in the regulation of bone metabolism, especially fish oil which demonstrated a greater level of protection against GC-induced osteoporosis.

Preliminary Study on Effect of Lactiplantibacillus plantarum on Osteoporosis in the Ovariectomized Rat

  • Eun-Sun Jin;Ji Yeon Kim;JoongKee Min;Sang Ryong Jeon;Kyoung Hyo Choi;Shehzad Abid Khan;Gi-Seong Moon;Je Hoon Jeong
    • 한국축산식품학회지
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    • 제43권4호
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    • pp.712-720
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    • 2023
  • Osteoporosis is a growing global health concern primarily associated with decreased estrogen in postmenopausal women. Recently, some strains of probiotics were examined for potential anti-osteoporotic effects. This study intended to evaluate the impacts of Lactiplantibacillus plantarum MGE 3038 strain (MGE 3038) in ovariectomized rats. For this purpose, twelve weeks old female Wistar rats (n=21; 250-300 g) were divided into 3 groups; ovariectomy (OVX) group, OVX/MGE 3038 group and Sham group (control). In these groups; two went through respective OVX and one had daily MGE 3038 administration through oral gavage. Prior to 16 weeks after OVX, we collected blood samples and extracted the tibiae. We scanned the extracted tibiae by in-vivo micro-computed tomography (micro-CT) and evaluated pathology by hematoxylin and eosin (H&E) and Masson's trichrome staining. The serum levels of C-telopeptide of type I collagen (CTX), osteocalcin (OC), and the receptor activator of nuclear factor-κB ligand (RANKL) were examined. The OVX/MGE 3038 group showed increases in bone mineral density, trabecular bone volume, trabecular number, and trabecular thickness (Tb.Th), and a decrease in trabecular spacing than the OVX group. However, OVX/MGE 3038 group and control group were measurably comparable in Tb.Th. Micro-CT, H&E, and Masson's trichrome findings exhibited increased preservation and maintenance of trabecular bone structure in the OVX/MGE 3038 group in comparison to the OVX group. In serum, the levels of CTX, OC and RANKL were significantly different between the OVX and OVX/MGE 3038 groups. Taken together, L. plantarum MGE 3038 could be helpful for the treatment of osteoporosis.

Romosozumab의 효과 및 심혈관계 안전성: 체계적 문헌고찰 및 메타분석 (Efficacy and Cardiovascular Safety of Romosozumab: A Meta-analysis and Systematic Review)

  • 최서용;김정민;오상현;천승현;정지은
    • 한국임상약학회지
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    • 제33권2호
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    • pp.128-134
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    • 2023
  • Background: This systematic review and meta-analysis aimed to evaluate the efficacy and cardiovascular safety of romosozumab compared with placebo. Methods: Randomized controlled trials (RCTs) were searched from Medline, EMBASE, Cochrane Central, and Web of Science until July 2022. Primary outcomes included the change in bone mineral density (BMD) from baseline at month 6. The secondary outcomes were the change of bone turnover markers (N-terminal propeptide of type 1 procollagen (P1NP); C-terminal telopeptide of type 1 collagen (CTX)) from baseline at month 3, and the incidence of cardiovascular adverse events for the total follow-up period. Results: A total of 7 RCTs on 8,370patients were included. Romosozumab showed better effects in improving BMD in both lumbar spine and femoral neck at month 6 (standardized mean difference, SMD 2.20 [95% CI: 1.89-2.52], SMD 0.63 [95% CI: 0.41-0.86]). In contrast to placebo, romosozumab significantly increased PINP levels and reduced CTX levels at month 3 (SMD 0.93 [95% CI: 0.65-1.22], SMD -1.03 [95% CI: -1.23~ -0.82]. However, there was no significant difference in the composite incidence of cardiovascular adverse events and major adverse cardiovascular events (OR 1.16 [95% CI: 0.82-1.65], OR 1.08 [95% CI: 0.75-1.56]). Conclusion: This analysis showed that romosozumab significantly improved BMD compared to placebo and was beneficial for change in bone turnover markers. There is no significant difference in the incidence of cardiovascular adverse events compared to placebo.

곰피가 갱년기 장애 유도 흰쥐의 골 대사 지표물질의 변화에 미치는 영향 (Effect of Ecklonia stolonifera Extracts on Bone Turnover Markers in Ovariectomized Rats)

  • 김영경;김미향
    • 한국식품영양과학회지
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    • 제39권12호
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    • pp.1769-1775
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    • 2010
  • 갱년기 여성에는 여러 폐경 증후들이 나타나는데, 특히 에스트로겐의 감소로 인한 혈중 지질 조성의 변화 등으로 심혈관계 질환의 발병율이 급격히 증가하는 경향을 보이고 있으며, 또한 급격한 골 소실로 인한 골다공증의 위험성이 높아 이에 대한 예방 및 치료에 대한 연구가 활발히 이루어지고 있다. 본 연구에서는 갈조류인 곰피 추출물을 시료로하여 in vivo 실험을 통하여 갱년기 장애 시 나타날 수 있는 골 손실 개선효과를 검토하기 위하여 골 형성 지표인 alkaline phosphatase(ALP) 활성 및 osteocalcin 농도와 골 용해 지표인 C-telopeptide of collagen cross-links(CTx) 및 결합조직 중의 collagen 함량을 측정하였다. ALP는 폐경 시 에스트로겐의 결핍으로 인하여 골 전환이 증가하므로 골 형성의 지표로써 널리 사용되고 있다. 난소절제 시 에스트로겐 결핍으로 bone turnover가 증가되어 비 난소절제군에 비해 혈장 중의 ALP 활성이 증가되었으나, 난소 절제 후 곰피 추출물을 투여한 군에서는 그 활성이 유의적으로 감소하는 경향이 나타났다. 이것은 난소절제 후 에스트로겐의 분비가 감소되는데 반해 곰피 추출물이 에스트로겐 대체 작용을 함으로써 난소절제로 인한 골 손실 정도를 완화시킨 것으로 추측되어진다. 혈중 osteocalcin은 난소를 절제한 OVX-CON군의 경우 난소를 절제하지 않은 SHAM군에 비해 높은 경향을 나타내어 상대적으로 골 중의 osteocalcin 함량은 줄어들었음을 나타내었다. 곰피 추출물을 투여한 경우 OVX-CON군보다 혈중 osteocalcin 농도가 농도 의존적으로 감소하는 경향을 나타내었으나, 유의적인 차이는 나타나지 않았다. 혈중 osteocalcin은 골 대사가 균형을 유지할 때에는 골 대사 표지자로서 작용하여 폐경 후 증가하는 것으로 나타나고 골 대사가 불균형 시에는 골 형성 표지자로서 작용하여 증가 또는 감소하는 것으로 나타나 폐경 후 혈중 osteocalcin의 증감에 대한 해석이 다르게 나타날 수 있으므로 보다 많은 연구가 추가적으로 이루어져야 할 것으로 생각된다. 한편, 골 용해 지표인 혈액 중의 CTx는 난소절제군이 비 절제군에 비해 높은 수준을 보여 난소절제군에 있어 골 용해가 증가되었음을 나타내었다. 반면 곰피 추출물의 투여로 인해 CTx 함량이 감소하였으며, ES200군의 경우 SHAM군보다 높은 수준으로 나타났다. 이는 난소절제로 인해 bone turnover가 증가된 상태에서 곰피 추출물의 투여로 인해 CTx 함량이 점진적으로 감소한 결과로써 곰피의 골 흡수 저해 효과에 의한 것으로 추정된다. 결합조직 중의 collagen 함량은 난소절제로 인하여 감소하였으나, 곰피 추출물의 투여에 의해 회복되는 경향을 나타내었다. 특히 연골 및 폐 조직에서는 난소 절제에 의해 감소한 collagen 함량이 난소 절제 후 곰피 추출물을 투여한 군에서 증가하였고, 곰피 추출물 200 mg/kg bw/day 투여군인 OVXEC200군에서 유의적으로 증가하는 결과가 나타났다. 한편 골 및 피부조직에서도 난소 절제에 의해 감소한 collagen 함량이 곰피 추출물 투여에 의해 증가하였고, 정상군인 SHAM군 수준 이상으로 증가하는 결과가 나타났다. 이상의 실험 결과는 estrogen 부족 시 일어날 수 있는 골 손실에 대한 예방 소재로써 곰피의 활용 가능성을 시사하고 있으며, 이를 활용한 기능성 소재 개발도 가능할 것으로 기대된다.

폐경 전.후 여성의 골밀도 및 골대사 지표에 영향을 미치는 요인 (The Association between Bone Mineral Density, Bone Turnover Markers, and Nutrient Intake in Pre- and Postmenopausal Women)

  • 박지연;최미연;이선희;최윤호;박유경
    • Journal of Nutrition and Health
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    • 제44권1호
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    • pp.29-40
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    • 2011
  • 본 연구는 서울 소재 대학병원에서 건강검진을 한 폐경 전 (283명)과 폐경 후 (143명) 여성 총 431명을 대상으로 골밀도, 골대사지표, 여성호르몬 및 영양소와의 관련성에 대해 알아보고자 실시하였으며 그 결과를 요약하면 다음과 같다. 연구 대상자의 평균 나이는 48.4세였고, 폐경 후 여성의 평균 폐경 나이는 50.3세였으며, 폐경 후 경과기간은 5.17년 이었다. 대상자의 평균 신장 체중 허리둘레 체질량지수 체지 방률은 각각 159.2 cm, 55.6 kg, 74.4 cm, $21.9\;kg/m^2$, 29.1% 이었으며, 폐경 후 여성의 나이, 신장, 허리둘레, BMI, 체지방률이 폐경 전 여성보다 유의하게 높았다 (p < 0.001, p < 0.001, p < 0.001, p < 0.01, p < 0.001). 평균 수축기혈압과 이완기혈압은 각각 113.5 mmHg, 69.4 mmHg었으며 폐경 후 여성에서 유의적으로 높았다 (p < 0.001, p < 0.01). 연구 대상자의 골 밀도를 살펴본 결과 폐경 후 여성이 폐경 전 여성보다 요추, 대퇴경부, 대퇴전체 골 밀도가 유의하게 감소되어 있었고 (p < 0.001) OC, CTx, ALP 지표는 폐경 전 여성보다 폐경 후 여성이 유의하게 높은 것으로 나타났다 (p < 0.001). 평균 열량 섭취량은 폐경 전 여성 1,679.4 kcal, 폐경 후 여성 1,621 kcal로 권장량의 93.2%, 90.05%이었으며 탄수화물, 단백질, 지방 섭취량의 에너지 기여 비율은 각각 58 : 18 : 24, 61 : 18 : 21 이었다, 단백질, 지방, 콜레스테롤 섭취량이 폐경 전 여성보다 폐경 후 여성에서 유의하게 높았다 (p < 0.05, p < 0.001, p < 0.001). 일반 영양소 섭취량 중에서 특히 칼륨 섭취량 (폐경 전 후 여성의 칼륨 섭취량은 권장량의 66.69%, 71.54%)이 권장량에 많이 부족한 반면 나트륨 섭취량 (폐경 전 후 여성의 나트륨 섭취량은 권장량의 226.8%, 216.5%)은 권장량보다 훨씬 높았으며 섬유소, 칼륨의 섭취량은 폐경 전 여성이 폐경 후 여성보다 유의하게 높게 나타났다 (p < 0.05, p < 0.05). 폐경 전 여성은 요추 골 밀도와 칼륨 섭취량 사이에서 음의 상관관계를, 폐경 후 여성에서는 요추 골 밀도와 칼슘 섭취량사이에서 양의 상관관계를 나타냈고 CTx와 열량, 지방, 탄수화물, 철분, 칼륨, 비타민 A, 베타카로틴, 나이아신, 엽산, 섬유소 섭취량과 음의 상관관계를 나타냈으며 OC와 나이아신 섭취량 사이에서 음의 상관관계를 나타났다. 요추골 밀도는 단백질, 지방, 칼슘과 양의 상관관계를 나타냈고 FSH 또한 지방, 나이아신 섭취량 사이에서 양의 상관관계를 나타냈다. 이상의 결과를 종합해 볼 때 폐경 전과 폐경 후 여성에서 골 표지자인 OC, CTx, ALP 지표는 골 밀도와 여성 호르몬 농도와 연관되어, 체내의 골 대사에 관련된 중요한 중재자의 하나임을 재확인하였고, 골 밀도를 예측하는 인자는 다소 차이가 있었지만 폐경 전 여성에서 체중, BMI, 폐경 후 여성에서는 칼슘 섭취량, 나이 등이 다른 인자들보다 중요도 및 예측에 있어 상대적인 영향이 더 큰 것을 알 수 있었다. 또한, 영양 섭취 상태는 폐경 전과 폐경 후 여성에서 열량 섭취는 권장량과 비교하였을 때 양호한 편이었으나 그에 반해, 칼륨, 칼슘 섭취는 부족, 나트륨은 과잉 섭취를 하고 있었다. 따라서 폐경 후 골다공증을 예방하고 골 감소를 최소화하기 위해서는 골 밀도에 긍정적 영향을 미친다고 판단된 혈청 칼슘의 충분한 섭취와 적절한 체중유지가 중요하며 반대로 부정적 영향을 미친 나트륨 섭취 감소는 골밀도의 감소를 예방하는데 중요한 역할을 할 수도 있다고 제안한다.

응급센터를 내원한 대퇴골 골절 환자에서 골밀도와 생화학적 표지자들의 의의 (Bone Mineral Bensity and Bone Turnover Markers in Patients with Femur Fracture Who Visited the Emergency Department)

  • 이경미;한승백;김준식;백광제;홍성빈;문경호;강준순;윤승환
    • Journal of Trauma and Injury
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    • 제18권2호
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    • pp.87-93
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    • 2005
  • Background: The most frequent fracture seen at the emergency department (ED) in the elderly is a femur fracture whereas they do not know the degree of osteoporosis. We analyzed the degree of osteoporosis in patients with femur fractures and compared patients with only femur fractures (FX) to patients with femur and vertebral fractures (VX) by examining the clinical features, the bone mineral density (BMD), and biochemical markers. Methods: From January 2004 to December 2004, we enrolled prospectively 30 femur fracture patients who visited the ED. The bone mineral densities of the lumbar spine and the femur were examined. Total calcium, phosphate, alkaline phosphatase, osteocalcin, and serum C-terminal telopeptide (s-CTx) were measured. The patients with femur fractures were divided into two subgroups according to the presence of vertebral fracture. Results: All BMDs of the FX group showed osteoporosis. The s-CTx levels were higher than normal. The patients in the FX with VX were older than those in the FX only group, and had lower BMDs. There were no significant differences in markers between the subgroups, but the incidence of trochanteric fractures was higher in FX with VX group than in the FX only group. Conclusion: Femur fractures in the elderly were associated with osteoporosis. In our study, despite a considerable difference in BMD between patients with femur fractures and those with femur fractures combined with vertebral fractures, there was no difference in biochemical markers on bone formation nor in the those of bone resorption. We will further investigate the biochemical markers and BMD in the population of osteoporotic fractures. So those indicators should be helpful for planning treatment and for prevention of FX in the elderly.

Usefulness of Fracture Risk Assessment Tool Using Lumbar Bone Mineral Density in Prediction of Osteoporotic Vertebral Fracture

  • Lee, Heui Seung;Lee, Sang Hyung;Chung, Young Seob;Yang, Hee-Jin;Son, Young-Je;Park, Sung Bae
    • Journal of Korean Neurosurgical Society
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    • 제58권4호
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    • pp.346-349
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    • 2015
  • Objective : To investigate the value of lumbar bone mineral density (BMD) in fracture risk assessment (FRAX) tool. Methods : One hundred and ten patients aged over 60 years were enrolled and divided into 2 groups as non-osteoporotic vertebral fracture (OVF) and OVF groups. The 10-year-risk of major osteoporotic vertebral fracture of each group was calculated by FRAX tool with femoral and lumbar spine BMDs to compare the usefulness of lumbar spine BMD in prediction of OVF. The blood level of osteocalcin and C-terminal telopeptide (CTX) as markers of activities of osteoblast and osteoclast, respectively were analyzed using the institutional database. Results : In the OVF group, the ratio of patients with previous fracture history or use of glucocorticoid was higher than those in non-OVF group (p=0.000 and 0.030, respectively). The levels of T-score of femur neck and lumbar spine in OVF group were significantly lower than those in non-OVF group (p=0.001 and 0.000, respectively). The risk of OVF in FRAX using femur BMD in non-OVF and OVF groups was $6.7{\pm}6.13$ and $11.4{\pm}10.06$, respectively (p=0.007). The risk of using lumbar BMD in the 2 groups was $6.9{\pm}8.91$ and $15.1{\pm}15.08$, respectively (p=0.002). The areas under the receiver operator characteristic curve in the FRAX risk with lumbar and femur neck BMD were 0.726 and 0.684, respectively. The comparison of osteocalcin and CTX was not significant (p=0.162 and 0.369, respectively). Conclusion : In our study, the 10-year risk of major osteoporotic fracture in the OVF group of our study was lower than the recommended threshold of intervention for osteoporosis. Hence, a lower threshold for the treatment of osteoporosis may be set for the Korean population to prevent OVF. In the prediction of symptomatic OVF, FRAX tool using lumbar spine BMD may be more useful than that using femur neck BMD.

Effect of Dietary Calcium on Spinal Bone Fusion in an Ovariectomized Rat Model

  • Cho, Jae-Hoon;Cho, Dae-Chul;Yu, Song-Hee;Jeon, Young-Hoon;Sung, Joo-Kyung;Kim, Kyoung-Tae
    • Journal of Korean Neurosurgical Society
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    • 제52권4호
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    • pp.281-287
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    • 2012
  • Objective : To evaluate the effect of calcium supplementation on spinal bone fusion in ovariectomized (OVX) rats. Methods : Sixteen female Sprague Dawley rats underwent bilateral ovariectomy at 12 weeks of age to induce osteoporosis and were randomly assigned to two groups : control group (n=8) and calcium-supplemented group (OVX-Ca, n=8). Autologous spinal bone fusion surgery was performed on both groups 8 weeks later. After fusion surgery, the OVX-Ca group was supplemented with calcium in drinking water for 8 weeks. Blood was obtained 4 and 8 weeks after fusion surgery. Eight weeks after fusion surgery, the rats were euthanized and the L4-5 spine removed. Bone fusion status and fusion volume were evaluated by manual palpation and three-dimensional computed tomography. Results : The mean fusion volume in the L4-5 spine was significantly greater in the OVX-Ca group ($71.80{\pm}8.06mm^3$) than in controls ($35.34{\pm}8.24mm^3$) (p<0.01). The level of osteocalcin, a bone formation marker, was higher in OVX-Ca rats than in controls 4 weeks ($610.08{\pm}10.41$ vs. $551.61{\pm}12.34$ ng/mL) and 8 weeks ($552.05{\pm}19.67$ vs. $502.98{\pm}22.76$ ng/mL) after fusion surgery (p<0.05). The level of C-terminal telopeptide fragment of type I collagen, a bone resorption marker, was significantly lower in OVX-Ca rats than in controls 4 weeks ($77.07{\pm}12.57$ vs. $101.75{\pm}7.20$ ng/mL) and 8 weeks ($69.58{\pm}2.45$ vs. $77.15{\pm}4.10$ ng/mL) after fusion surgery (p<0.05). A mechanical strength test showed that the L4-5 vertebrae in the OVX-Ca group withstood a 50% higher maximal load compared with the controls (p<0.01). Conclusion : Dietary calcium given to OVX rats after lumbar fusion surgery improved fusion volume and mechanical strength in an ovariectomized rat model.

Is the Agricultural Work a Risk Factor for Koreans Elderly Spinal Sagittal Imbalance?

  • Hong, Jong-Hwan;Han, Moon-Soo;Lee, Seul-Kee;Lee, Jung-Kil;Moon, Bong Ju
    • Journal of Korean Neurosurgical Society
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    • 제63권5호
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    • pp.623-630
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    • 2020
  • Objective : A primary degenerative sagittal imbalance has been considered because of unique lifestyles such as the prolonged crouched posture during agricultural work and performing activities of daily living on the floor. Previous papers have reported that sagittal imbalance disease is often seen distinctly in the farming districts of "oriental" countries such as Korea and Japan. However, this finding was only evaluated with the use of X-ray, and other factors such as magnetic resonance imaging (MRI), muscle volume, compression fracture, and laboratory results were not considered. Thus, using these, we evaluate the agricultural work-associated factors for Korean elderly spinal sagittal imbalance. Methods : We recruited 103 Korean participants who had a sagittal vertical axis (SVA) of >5 cm in this Korean Elderly Sagittal Imbalance Cohort Study. The following were evaluated : radiological parameters, MRI, compression fracture, vitamin D, parathyroid hormone, C-terminal telopeptide, osteocalcin, bone mineral density and muscle fatty change, muscle volume, and health-related quality of life from patients' survey. Moreover, in this survey, the farmers' annual working hours were investigated. Subsequently, we analyzed the associated factors for spinal sagittal imbalance depending on occupation. Results : A total of 46 participants were farmers, and the others were housewives, sellers, and office workers. The farmer group had more SVA (141 vs. 99 mm, p=0.001) and pelvic tilt (31° vs. 24°, p=0.004) and lesser lumbar lordosis (20° vs. 30°, p=0.009) and thoracic kyphosis (24° vs. 33°, p=0.03) than non-farmer group. A significantly positive correlation was noted between the working hour and SVA in the farmer group (p=0.014). The visual analogue scale score for back pain (8.26 vs. 6.96, p=0.008) and Oswestry Disability Index (23.5 vs. 19.1, p=0.003) in the farmer group were higher than that in the non-farmer group, but the Short Form-36 score was not significantly different between the two groups. The Mini-Mental State Exam score was significantly lower in the farmer group than in the non-farmer group (24.85 vs. 26.98, p=0.002). Conclusion : The farmer group had more sagittal imbalance and back pain in proportion to the working hours even though the muscle and bone factors and general laboratory condition were not significantly different between the two groups. These results supported that the long hours spent in the crouched posture while performing agricultural work were a risk factor for severe sagittal imbalance.

폴리칸이 중년 여성의 골대사에 미치는 영향: 12주간의 무작위배정, 이중눈가림, 플라세보 대조 연구 (Effects of Polycan on bone Metabolism in healthy Perimenopausal Women: a 12-week Randomized, Double-blind, Placebo-controlled study)

  • 김민걸;하기찬;백향임;김선영;김주완;김기영;조형래;채한정;채수완;김달식
    • 한국임상약학회지
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    • 제21권4호
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    • pp.297-304
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    • 2011
  • 배경: 골다공증은 골대사의 불균형으로 인해 골 흡수가 골 형성보다 많아져 골밀도가 감소함으로서 발생한다. 골다공증의 이상적인 치료목표는 골형성을 증가시키거나 골소실을 방지하여 골량을 현 상태로 유지하는 것이다. 따라서 향후 발생되는 골소실을 에방하는 것이 골다공증의 원칙적이고 효과적인 치료방법이 될 것이다. 본 연구에서는 흑효모 중 $Aureobasidium$ $pullulans$으로부터 유래한 폴리칸(베타-글루칸)이 중년여성의 골대사에 미치는 영향을 규명하고자 하였다. 연구방법: 골대사에 대한 폴리칸의 효과를 규명하기 위해 12주간의 무작위배정, 이중눈가림, 플라세보 대조 임상연구를 수행하였다. 총 60명(폴리칸 투여군30명, 플라세보 투여군 30명)의 중년 여성 피험자가 등록되어 이 중 총 58명의 피험자가 최종적으로 12주간의 임상연구를 종료하였다. 결 과: 폴리칸(150 mg/d) 투여 12주 후, 폴리칸 투여군은 요 중 Deoxypyridinoline (DPD) 농도가 유의적인 감소를 보였다($P$=0.014). 혈청 중 Osteocalcin(OSC) 농도는 두 군 모두에서 유의적으로 증가하였으며, bone-specific alkaline posphatase (bALP) 와 collagen type 1 cross-linked C-telopeptide (CTx)는 유의적 변화가 보이지 않았다. 폴리칸은 골밀도(BMD)와 혈청 부갑상선 호르몬(iPTH)에 대해 유의적인 변화를 보이지 않았으나, 24시간 요 중 Ca 배설량은 폴리칸 투여군에서 유의하게 감소되었다($P$=0.028). 또한 폴리칸 투여군에서 고밀도지단백 콜레스테롤(HDL-cholesterol) 농도의 증가 경향 및 중성지방(triglyceride)의 유의적인 감소가 보였다. 임상연구 기간 중에 발생한 이상반응은 두 군간에 유의적인 차이를 보이지 않았다. 결 론: 본 연구에서는 폴리칸이 골대사 및 지질에 대해 일부 개선효과가 있음을 보여주었다. 그러나, 골다공증 예방 측면에서 보다 장기적인 임상연구와 피험자 수를 확대하여 골대사 및 지질대사에 대한 폴리칸의 예방적 효과를 규명할 필요가 있을것으로 사료된다.