• 제목/요약/키워드: dietary restriction

검색결과 159건 처리시간 0.03초

Combinatorial Approach Using Caenorhabditis elegans and Mammalian Systems for Aging Research

  • Lee, Gee-Yoon;Sohn, Jooyeon;Lee, Seung-Jae V.
    • Molecules and Cells
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    • 제44권7호
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    • pp.425-432
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    • 2021
  • Aging is associated with functional and structural declines in organisms over time. Organisms as diverse as the nematode Caenorhabditis elegans and mammals share signaling pathways that regulate aging and lifespan. In this review, we discuss recent combinatorial approach to aging research employing C. elegans and mammalian systems that have contributed to our understanding of evolutionarily conserved aging-regulating pathways. The topics covered here include insulin/IGF-1, mechanistic target of rapamycin (mTOR), and sirtuin signaling pathways; dietary restriction; autophagy; mitochondria; and the nervous system. A combinatorial approach employing high-throughput, rapid C. elegans systems, and human model mammalian systems is likely to continue providing mechanistic insights into aging biology and will help develop therapeutics against age-associated disorders.

The Role of mRNA Quality Control in the Aging of Caenorhabditis elegans

  • Hyunwoo C. Kwon;Yunkyu Bae;Seung-Jae V. Lee
    • Molecules and Cells
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    • 제46권11호
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    • pp.664-671
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    • 2023
  • The proper maintenance of mRNA quality that is regulated by diverse surveillance pathways is essential for cellular homeostasis and is highly conserved among eukaryotes. Here, we review findings regarding the role of mRNA quality control in the aging and longevity of Caenorhabditis elegans, an outstanding model for aging research. We discuss the recently discovered functions of the proper regulation of nonsense-mediated mRNA decay, ribosome-associated quality control, and mRNA splicing in the aging of C. elegans. We describe how mRNA quality control contributes to longevity conferred by various regimens, including inhibition of insulin/insulin-like growth factor 1 (IGF-1) signaling, dietary restriction, and reduced mechanistic target of rapamycin signaling. This review provides valuable information regarding the relationship between the mRNA quality control and aging in C. elegans, which may lead to insights into healthy longevity in complex organisms, including humans.

비만클리닉에 내원한 여성의 심리적 특성 (The Psychological Characteristics of Women in the Obesity Clinic)

  • 박샛별;연규월;우행원
    • 정신신체의학
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    • 제11권2호
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    • pp.137-148
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    • 2003
  • 연구목적: 비만클리닉에 내원한 여성들을 대상으로 식이제한 태도 및 우울증상, 스트레스 등 심리적인 문제들에 대한 특성을 파악하고 비만과의 상관관계를 조사하고자 본 연구를 시행하였다.방 법: 2001년 5월 한 달 동안 아주대학교병원과 서울 시내에 소재한 비만 클리닉에 내원한 여성 150명을 대상으로 사회인구학적 특성 및 신체적 특성, Three Factor Eating Questionnaire, Symptom Check List-90-R(SCL-90-R), 스트레스 인지척도 등을 설문 조사하였고 저자가 Hamilton Depression Rating Scale를 측정하였으며, 이 중 설문지의 답을 충실히 기입한 116명을 대상으로 하였다. 결 과: 연구대상 중 체질량지수 $25.0kg/m^2$ 이상인 비만군은 50.0%였으며, 연령이 증가함에 따라 체질량지수가 증가하였다(p<0.001). 정상이하 체중군에서 미혼인 경우가 48.8%로 비만군 13.8%에 비해 유의하게 높았으며(p<0.01), 흡연률 및 음주율과 체질량지수와는 유의한 관계가 없었다. Three Factor Eating Questionniare는 체질량지수와 체지방과 비교해 볼 때 유의한 차이를 보이지 않았으나, Factor 2(Disinhibition)와 Global Severity Index(r=0.27, p<0.01), Factor 3(Hunger)과 Global Severity Index(r=0.24, p<0.01)와는 각각 유의한 상관관계가 있었다. 체질량지수에 따른 Symptom Check List-90-R의 각 증상척도는 편집증 척도만이 과체중군과 비만군 간에 통계적으로 유의한 차이가 있었다(p<0.05). 대상군 모두 Symptom Check List-90-R의 전체 척도가 50점 이하였으나 각 증상척도는 정상이하 체중군과 비만군이 과체중군에 비해 높은 경향이 있었다. Global Severity Index와 Hamilton Depression Rating Scale(r=0.75, p<0.01), Global Severity Index와 스트레스 인지척도(r=0.32, p<0.01) 간에 각각 유의한 상관관계가 있었다. Hamilton Depression Rating Scale를 체지방 정도에 따라 정상군과 비만군 두 군으로 나누어 비교한 결과 비만군에서 우울증상이 유의하게 높았다(p<0.05). 스트레스의 정도는 체질량지수 및 체지방과 유의한 차이가 없었고 대상군 모두 높은 스트레스를 느끼고 있는 것으로 나타났으며, 스트레스 인지척도가 Factor 2(r=0.29, p<0.01) 및 Factor 3(r=0.37, p<0.01)과 유의한 상관관계가 있는 것으로 보아 스트레스가 식이제한 태도에 영향을 미치는 것으로 생각된다. 또한, 스트레스 인지척도가 Symptom Check List-90-R 중 우울척도, Global Severity Index 및 Hamilton Depression Rating Scale와도 유의한 상관관계가 있는 것으로 보아 스트레스가 심리적인 특성에 영향을 미치는 것으로 생각된다(r=0.33, r=0.32, r=0.34, p<0.01). 결 론: 비만한 사람들은 우울을 비롯한 심리적 고통을 더 많이 가지며 스트레스 점수가 높고, 이는 식이제한 태도와도 관계가 있을 것으로 생각된다. 향후 비만클리닉을 방문하는 사람들의 정신과적 문제에 대한 적극적인 평가 및 정신과적 개입이 필요할 것으로 생각된다.

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식이 sodium 제한 및 식이 sodium 제한에 따른 항고혈압제의 투여가 만성신부전증의 진행에 미치는 영향에 관한 실험적 연구 (Effects of Dietary Salt Restriction on the Development of Renal Failure in the Excision Remnant Kidney Model)

  • 김기혁;김상윤;강용주;맹원재;김교순
    • Childhood Kidney Diseases
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    • 제3권2호
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    • pp.170-179
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    • 1999
  • 목적 : 만성신부전유발 백서에서 식이 sodium 제한이 만성신부전의 진행속도 및 혈압조절에 어떠한 영향을 주는지, 또한 항고혈압제제 (enalapril: E, nicardipine: N)와 병행 투여하였을 매 항고혈압제제 단독투여보다 만성신부전의 진행속도 및 혈압조절에 어떠한 영향을 주는 지를 연구하였다. 방법 : 5/6 신절제술로 만성신부전을 유발시킨 백서를 수술 제 7일부터 무작위로 0.49% sodium 식이군, 0.25% sodium 식이군, 0.49% sodium 식이 enalapril군, 0.49% sodium 식이 nicardipine군, 0.25% sodium식이 enalapril군, 0.25% sodium식이 nicardipine군으로 나누고 신절제술 4주, 12주, 16주 혹은 24주에 혈압, 24시간 단백뇨의 변화, 신 조직의 mesangial expansion score(MES) 및 사구체용적의 변화를 비교 분석하였다. 곁 과 : 1) 0.25% sodium 식이군은 0.49% sodium 식이군보다 혈압의 감소를 보였고 0.25% sodium 식이 enalapril군, 0.25% sodium 식이 nicardipine군, 0.49% sodium 식이 enalapril군, 0.49% sodium 식이 nicardipine 군에서는 혈압의 감소가 관찰되었다. 2) 16주째 0.25% sodium 식이 enalapril군, 0.25% sodium 식이 nicardipine군, 0.49% sodium 식이 enalapril군, 0.49% sodium 식이 nicardipine 군은 0.49% sodium 식이군보다 의의있는 단백뇨의 감소를 보였다 (P<0.05). 0.25% sodium 식이군의 16주째 뇨단백은 $78{\pm}16$ mg 이었고 0.25% sodium 식이 enalapril 군, 0.25% sodium 식이 nicardipine군은 각각 $35{\pm}9mg,\;41{\pm}15mg$으로 enalapril, nicardipine 에 의해 뇨단백의 감소를 관찰할 수 있었고, 0.25% sodium 식이군의 24주째 뇨단백은 $82{\pm}10$ mg 이었고 0.25% sodium 식이 enalapril 군,0.25% sodium 식이 nicardipine군은 각각 $54{\pm}3mg,\;76{\pm}11mg$으로, enalapril 에 의해서만 24 시간 단백뇨의 의의있는 감소를 관찰할 수 있었다. 3) 24주째 백서를 희생하여 크레아티닌 청소률을 관찰한 결과 심한 신부전은 관찰되지 않았고, 0.25% sodium 식이 대조군에 비해 0.25% sodium 식이 enalapril군에서 사구체여과율이 증가됨을 관찰할 수 있었다. 4) 신절제술후 남아 있는 신조직무게를 비교하여 보면 24주째 0.25% sodium 식이군, 0.25% sodium 식이 enalapril군, 0.25% sodium 식이 nicardipine군에서 16주째 0.49% sodium 식이군, 0.49% sodium 식이 enalapril군, 0.49% sodium 식이 nicardipine 군보다 의의있게 신조직무게가 증가됨을 관찰할 수 없었다. 5) 0.25% sodium 식이군은 0.49% sodium 식이군과 비교하여 MES의 현저한 감소를 보였고 (0.25% sodium식이군: 12주; $1.97{\pm}0.02$, 24주; $2.06{\pm}0.03$ vs. 0.49% sodium 식이군: 12주; $2.29{\pm}0.09$, 16주; $2.55{\pm}0.16$, P<0.05) 12주 이후에 관찰한 MES는 0.25% sodium 식이군, 0.25% sodium 식이 enalapril군, 0.25% sodium 식이 nicardipine군 세군간의 통계적인 차이는 없었다. 6) 24주에 시행한 0.25% sodium 식이군의 사구체용적은 16주에 시행한 0.49% sodium 식이군의 사구체용적보다 현저하게 감소되어있었다 (0.25% sodium 식이군:24주; $1.58{\pm}0.18{\times}10^6{\mu}m^3$ vs. 0.49% sodium 식이군:16주; $1.98{\pm}0.18{\times}10^6{\mu}m^3$, P<0.05). 24주 0.25% sodium 식이 enalapril군의 사구체용적($1.51{\pm}0.08{\times}10^6{\mu}m^3$)은 16주 0.49% sodium 식이 enalapril군의 사구체용적($1.81{\pm}0.22{\times}10^6{\mu}m^3$)과 비교하여 현저한 감소를 보였다. 12주, 24 주에 관찰한 0.25% sodium 식이군, 0.25% sodium 식이 enalapril군, 0.25% sodium 식이 nicardipine군의 사구체용적은 세군간에 의의있는 차이는 없었다. 결론 : 식이 sodium 제한은 대상성 신비대의 감소를 통해 신손상을 감소시켰고 혈압의 감소에도 도움을 주었다. 식이 sodium 제한과 항고혈압제재 특히 enalapril을 병행투여하였을 때 항고혈압제재 단독투여보다 뇨단백 및 신조직의 대상성 비대를 감소시켰다. 따라서 만성신부전증에서 경도의 저sodium식이가 만성신부전으로의 진행을 지연시키며 혈압의 감소에도 도움이 됨을 알 수 있었다.

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IT-기반의 임신성 당뇨병 영양관리 프로그램 개발을 위한 요구도 조사 (Needs for Development of IT-based Nutritional Management Program for Women with Gestational Diabetes Mellitus)

  • 한찬정;임선영;오은숙;최윤희;윤건호;이진희
    • 대한지역사회영양학회지
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    • 제22권3호
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    • pp.207-217
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    • 2017
  • Objectives: The aim of this study was to examine self-management status, nutritional knowledge, barrier factors in dietary management and needs of nutritional management program for women with Gestational Diabetes Mellitus (GDM). Methods: A total of 100 women with GDM were recruited from secondary and tertiary hospitals in Seoul. The questionnaire composed of general characteristics, status of self-management, dietary habits, nutrition knowledge, barrier factors in dietary management, needs for nutrition information contents and nutritional management programs. Data were collected by a self-administered questionnaire. All data were statistically analyzed using student's t-test and chi-square test using SAS 9.3. Results: About 35% of the subjects reported that they practiced medical nutrition and exercise therapy for GDM control. The main sources of nutrition information were 'internet (50.0%)' and 'expert advice (45.0%)'. More than 70% of the subjects experienced nutrition education. The mean score of nutrition knowledge was 7.5 point out of 10, and only about half of the subjects were reported to be correctly aware of some questions such as 'the cause of ketosis', 'the goal of nutrition management for GDM', 'the importance of sugar restriction on breakfast'. The major obstructive factors in dietary management were 'eating more than planned when dining out', 'finding the appropriate menu when dining out'. The preferred nutrition information contents in developing management program were 'nutritional information of food', 'recommended food by major nutrients', 'the relationship between blood glucose and food', 'tips on menu selection at eating out'. The subjects reported that they need management program such as 'example of menu by calorie prescription', 'recommended weight gain guide', 'meal recording and dietary assessment', 'expert recommendation', 'sharing know-how'. Conclusions: Based on the results of this study, it is necessary to develop a program that provide personalized information by identifying the individual characteristics of the subjects and expert feedback function through various information and nutrition information contents that can be used in real life.

아토피피부염 영아의 영양장애 사례보고와 채식주의에 관한 고찰 (Marasmus and Kwashiorkor by Nutritional Ignorance Related to Vegetarian Diet and Infants with Atopic Dermatitis in South Korea)

  • 정상진;한영신;정승원;안강모;박화영;이상일;조영연;최혜미
    • Journal of Nutrition and Health
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    • 제37권7호
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    • pp.540-549
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    • 2004
  • Infants and children with food related Atopic Dermatitis (AD) need extra dietary efforts to maintain optimal nutrition due to food restriction to prevent allergy reactions. However, nutrition ignorance and food faddism make patients even more confused and practice desirable diet more difficult. The objective of this study was to report the AD patients' malnutrition cases in Korea. We report on 2 cases of severe nutritional deficiency caused by consuming macrobiotic diets which avoid processed foods and most animal foods, i.e. one of vegetarian diet. Case 1, a 12-month-old male child, was admitted with severe marasmus. Because of a history of AD, he was started on mixed grain porridge at 3 months without any breast milk or formula feeding. His caloric intake was 66% and protein intake was 69% of the recommended dietary allowance. Patient's height and weight was under 3th percentile. On admission the patient was unable to crawl or roll over. Case 2, a 9-month-old AD female patient, was diagnosed with kwashiorkor and rickets. She was also started on mixed grain porridge at 100 days due to AD. Her caloric intake has been satisfied recommended dietary allowance until 7 months, however, she conducted sauna bath therapy and reduced both energy and protein intake at 8 months. The amount of protein intake for case 2 was higher than recommended dietary allowance, but, sauna therapy and severe AD with intakes of low guality protein may increase patient's protein requirement resulting in kwashiorkor. Case 2 patient's height and weight was on 3th percentile. Both cases showed low intake of calcium, iron, zinc, vitamin A, vitamin E and especially very low intake of vitamin B$_{12}$ and vitamin D. Allergy tests for certain foods had not done prior to admission for both cases. They followed the dietary advise operated by macrobiotic diet internet site. In conclusion, AD infants' parents and caregivers should contact a pediatrician trained as a specialist in allergy for accurate diagnosis. For infant patients, breast or formula feeding including hypoallergenic formula should be continued until their one year of age. When certain foods need to be restricted or to follow special diets such as vegetarian diet, consultation with pediatrician and dietitian is needed.d.

Influence of substituting steam-flaked corn for dry rolled corn on feedlot cattle growth performance when cattle are allowed either ad libitum or restricted access to the finishing diet

  • Gonzalez-Vizcarra, Victor Manuel;Plascencia, Alejandro;Ramos-Avina, Daniel;Zinn, Richard Avery
    • Asian-Australasian Journal of Animal Sciences
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    • 제30권11호
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    • pp.1563-1567
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    • 2017
  • Objective: The influence of substituting steam-flaked corn (SFC) for dry rolled corn (DRC) on feedlot cattle growth performance and dietary net energy when cattle are allowed either ad libitum or 2-h restricted access to the finishing diet was evaluated. Methods: Treatment effects were tested using 96 crossbred steers ($251{\pm}2kg$) during the initial 56 d of the finishing phase. Cattle were blocked by weight and randomly assigned within blocks to 16 pens (4 pens/treatment). Bunk space was sufficient (41 cm/head) to allow all steers access to the feed bunk at the same time. Treatments consisted of two finishing diets containing (dry matter basis) 77.1% corn grain processed by dry rolling (density = 0.50 kg/L) or steam flaking (density = 0.36 kg/L). Cattle were fed twice daily at 06:00 and 14:00 h, allowing for approximately 5% residual. In the case of restricted feeding, steers were allowed access to feeders for 1 h following each feeding, after which residual feed was withdrawn. Results: There were no treatment interactions on dry matter intake (DMI), average daily gain (ADG), gain efficiency (G:F), or dietary net energy (NE). Restricting feed access time reduced (p<0.01) feed intake, and hence, ADG. Substitution of SFC for DRC increased (p<0.01) ADG, feed efficiency (G:F), and estimated dietary NE, without affecting DMI. Based on tabular net energy of maintenance ($NE_m$) value (2.18 Mcal/kg) for DRC, the estimated $NE_m$ value for SFC using the replacement technique, averaged 2.44 Mcal/kg; an improvement of 10.7%. The ratio of observed-to-expected dietary NE was not affected by feed access time. Conclusion: Substitution of SFC for DRC in finishing diets for feedlot cattle enhanced ADG, gain efficiency, and the NE value of the diet. Although restriction of feed access time depressed DMI and ADG, it did not affect the comparative benefit of steam flaking toward enhancement of ADG, G:F, and dietary NE.

Effects of chronic caloric restriction on kidney and heart redox status and antioxidant enzyme activities in Wistar rats

  • Dutra, Marcio Ferreira;Bristot, Ivi Juliana;Batassini, Cristiane;Cunha, Nubia Broetto;Vizuete, Adriana Fernanda Kuckartz;Souza, Daniela Fraga De;Moreira, Jose Claudio Fonseca;Goncalves, Carlos-Alberto
    • BMB Reports
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    • 제45권11호
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    • pp.671-676
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    • 2012
  • Caloric restriction (CR) has been associated with health benefits and these effects have been attributed, in part, to modulation of oxidative status by CR; however, data are still controversial. Here, we investigate the effects of seventeen weeks of chronic CR on parameters of oxidative damage/modification of proteins and on antioxidant enzyme activities in cardiac and kidney tissues. Our results demonstrate that CR induced an increase in protein carbonylation in the heart without changing the content of sulfhydryl groups or the activities of superoxide dismutase and catalase (CAT). Moreover, CR caused an increase in CAT activity in kidney, without changing other parameters. Protein carbonylation has been associated with oxidative damage and functional impairment; however, we cannot exclude the possibility that, under our conditions, this alteration indicates a different functional meaning in the heart tissue. In addition, we reinforce the idea that CR can increase CAT activity in the kidney. Moreover, CR caused an increase in CAT activity in kidney, without changing other parameters. Protein carbonylation has been associated with oxidative damage and functional impairment; however, we cannot exclude the possibility that, under our conditions, this alteration indicates a different functional meaning in the heart tissue. In addition, we reinforce the idea that CR can increase CAT activity in the kidney.

Branched-chain Amino Acids Reverse the Growth of Intrauterine Growth Retardation Rats in a Malnutrition Model

  • Zheng, Chuan;Huang, Chengfei;Cao, Yunhe;Wang, Junjun;Dong, Bing
    • Asian-Australasian Journal of Animal Sciences
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    • 제22권11호
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    • pp.1495-1503
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    • 2009
  • This experiment was conducted to determine the effect of dietary supplementation with BCAA (branched-chain amino acids: leucine, isoleucine and valine) on improving the growth of rats in a malnutritional IUGR (Intrauterine Growth Retardation) model, which was established by feeding restriction. In the experimental treatment, rats were fed purified diets supplemented with BCAA (mixed) during the whole gestation period, while arginine and alanine supplementation were set as the positive and negative control group, respectively. The results showed that, compared to the effect of alanine, BCAA reversed IUGR by increasing the fetus weights by 18.4% and placental weights by 18.0% while fetal numbers were statistically increased. Analysis of gene and protein expression revealed that BCAA treatment increased embryonic liver IGF-I expression; the uterus expressed higher levels of estrogen receptor-$\alpha$ (ER-$\alpha$) and progesterone receptor (PR), and the placenta expressed higher levels of IGF-II. Amino acid analysis of dam plasma revealed that BCAA supplementation effectively enhanced the plasma BCAA levels caused by the feed restriction. BCAA also enhanced the embryonic liver gluconeogenesis by augmenting the expression of two key enzymes, namely fructose-1,6-biphosphatase (FBP) and phosphoenolpyruvate carboxykinase (PEPCK). In conclusion, supplementation of BCAA increased litter size, embryonic weight and litter embryonic weight by improving the dam uterus and placental functions as well as increasing gluconeogenesis in the embryonic liver, which further provided energy to enhance the embryonic growth.