The high prevalence of non-communicable diseases is a challenging problem in the Cameroonian population and women are the most affected. The aim of the present study was to determine and compare the prevalence of meta...The high prevalence of non-communicable diseases is a challenging problem in the Cameroonian population and women are the most affected. The aim of the present study was to determine and compare the prevalence of metabolic abnormalities and metabolic syndrome (MetS) among pre- and post-men- opausal women living in urban areas in Cameroon. A total of 499 women were recruited during a mass health campaign in 2018. Metabolic abnormalities were diagnosed using International Diabetes Federation (IDF) criteria. MetS was defined using IDF criteria with slight modification (total cholesterol used instead of HDL cholesterol). Logistic regression was used to estimate the association between menopausal status and metabolic abnormalities and MetS in age control and non-control models. The prevalence of high waist- to-hip ratio (56.8% vs 36.3%, p < 0.001), elevated fasting blood glucose (glycemia ≥ 100 mg/dL) (38.7% vs 26.9%, p = 0.006);diabetes (14.6% vs 5.7%, p = 0.001);high triglycerides level (29.7% vs 17.1%, p = 0.002);hyperlipidemia (high total cholesterol and or triglycerides levels) (45.0% vs 30.8%, p = 0.002);and elevated blood pressure (67.9% vs 56.1%, p = 0.007) were higher among post-menopausal than pre-menopausal women. The overall prevalence of MetS was 30.1% and post-menopausal women were more affected (33.8% vs 25.0%;p = 0.034). The odds ratio of MetS was 1.888 (95% CI: 1.016 - 3.507) when age was covariate, but was slightly reduced without age control (OR = 1.532;95% CI: 1.031 - 2.275). Metabolic abnormalities seem to be a major health problem among Cameroonian women and menopausal status increased the risk of developing a cardiovascular event.展开更多
The microRNA-21 （miR-21） is known to play a major role in cancer progression; however, its function in the cardiovascular system appears to be even more complex and conflicting. To characterize miR-21 expression in ...The microRNA-21 （miR-21） is known to play a major role in cancer progression; however, its function in the cardiovascular system appears to be even more complex and conflicting. To characterize miR-21 expression in the plasma of individuals with or without metabolic syndrome （MetS）, 58 MetS cases and 96 non-MetS controls were investigated.展开更多
Binge Eating Disorder (BED) or uncontrolled food consumption is strongly associated with metabolic syndrome as a significant risk factor for health. Metabolic Syndrome (MetS) is characterized by central adiposity, hig...Binge Eating Disorder (BED) or uncontrolled food consumption is strongly associated with metabolic syndrome as a significant risk factor for health. Metabolic Syndrome (MetS) is characterized by central adiposity, high-density lipoprotein (HDL) cholesterol, hypertriglyceridemia, hypertension, and increased fasting blood glucose. Approximately 9% of the general population suffer from Binge eating disorder (BED), a significant risk factor for Metabolic Syndrome (MetS). This study evaluates the association between Binge Eating disorder (BED) and Metabolic Syndrome (MetS) development through a systematic review. Through analysis of previous studies, we discovered that 93 percent of those with BED had metabolic syndrome parameters in a series of investigations on BED conducted in general care. This systematic review aims to connect the frequency of binge-eating episodes and the development of metabolic syndrome. We have extracted five major studies (n = 5) through screening following systematic review standards.展开更多
The insect brain is the central part of the neurosecretory system,which controls morphology,physiology,and behavior during the insect’s lifecycle.Lepidoptera are holometabolous insects,and their brains develop during...The insect brain is the central part of the neurosecretory system,which controls morphology,physiology,and behavior during the insect’s lifecycle.Lepidoptera are holometabolous insects,and their brains develop during the larval period and metamorphosis into the adult form.As the only fully domesticated insect,the Lepidoptera silkworm Bombyx mori experienced changes in larval brain morphology and certain behaviors during the domestication process.Hormonal regulation in insects is a key factor in multiple processes.However,how juvenile hormone(JH)signals regulate brain development in Lepidoptera species,especially in the larval stage,remains elusive.We recently identified the JH receptor Methoprene tolerant 1(Met1)as a putative domestication gene.How artificial selection on Met1 impacts brain and behavioral domestication is another important issue addressing Darwin’s theory on domestication.Here,CRISPR/Cas9-mediated knockout of Bombyx Met1 caused developmental retardation in the brain,unlike precocious pupation of the cuticle.At the whole transcriptomelevel,theecdysteroid(20-hydroxyecdysone,20 E)signaling and downstream pathways were overactivated in the mutant cuticle but not in the brain.Pathways related to cell proliferation and specialization processes,such as extracellular matrix(ECM)-receptor interaction and tyrosine metabolism pathways,were suppressed in the brain.Molecular evolutionary analysis and in vitro assay identified an amino acid replacement located in a novel motif under positive selection in B.mori,which decreased transcriptional binding activity.The B.mori MET1 protein showed a changed structure and dynamic features,as well as a weakened co-expression gene network,compared with B.mandarina.Based on comparative transcriptomic analyses,we proposed a pathway downstream of JH signaling(i.e.,tyrosine metabolism pathway)that likely contributed to silkworm larval brain development and domestication and highlighted the importance of the biogenic amine system in larval evolution during silkworm domestication.展开更多
Background:With lifestyle modification and over-nutrition,the prevalence of nonalcoholic fatty liver disease(NAFLD)has been increasing annually.Here we aimed to assess the updated prevalence of NAFLD,and to evaluate t...Background:With lifestyle modification and over-nutrition,the prevalence of nonalcoholic fatty liver disease(NAFLD)has been increasing annually.Here we aimed to assess the updated prevalence of NAFLD,and to evaluate the association of NAFLD with metabolic abnormalities according to gender,body mass index and age.Methods:A population-based cross-sectional study was conducted in Shanghai from December 2016 to July 2017.With a three-stage stratified sampling strategy,3,717 eligible participants were enrolled for the analysis.Results:In total,1,217 subjects(32.7%)had NAFLD.Among them,400(16.3%)of the nonobese and 817(65.0%)of the obese subjects had NAFLD.The prevalence of NAFLD was increased according to the quartiles of age and waist circumference(WC)in the nonobese subjects.Females with nonobese NAFLD had 1.6-,2.6-,2.0-,2.3-and 3.3-fold higher risks for metabolic syndrome,diabetes mellitus,hyperglycemia,hypertriglycerdemia(high TG)and low high-density lipoprotein cholesterol than obese subjects without NAFLD,respectively.Males had comparable metabolic profiles in both groups,except for a 2.0-fold higher risk of high TG in nonobese NAFLD subjects compared with obese subjects without NAFLD.More impressively,the homeostasis metabolic assessment insulin resistance index was comparable between the two groups.Conclusions:The increase of age and WC had significant impact on the risk of NAFLD in nonobese subjects.The presence of NAFLD in nonobese subjects increased the risk of metabolic diseases than obese subjects without NAFLD,especially in female.展开更多
Background:Cholecystectomy is a common surgical procedure to treat symptomatic gallstones;however,the long-term outcomes after cholecystectomy are unknown.Therefore,we aimed to investigate whether incident metabolic s...Background:Cholecystectomy is a common surgical procedure to treat symptomatic gallstones;however,the long-term outcomes after cholecystectomy are unknown.Therefore,we aimed to investigate whether incident metabolic syndrome(MetS)is associated with cholecystectomy through a large,population-based,longitudinal study.Methods:Subjects aged≥20 years who underwent cholecystectomy from 2010 to 2014(n=76,485)and controls(n=76,485),matched for age and sex,were identified from the Korean National Health Insurance Corporation.Cox proportional hazards analyses were performed to evaluate the association between cases and incident MetS,and hazard ratios and 95% confidence intervals(CIs)were calculated.Results:A total of 152,970 patients were included.Mean age was 52.47±12.76 years,and 50.65% of participants were male.During the follow-up period,there were 38,979(25.48%)newly diagnosed MetS cases in the study participants.The risk of MetS in the cholecystectomy group was approximately 20% higher than that in the control group[adjusted odds ratio(OR),1.20;95%CI:1.17-1.23].In the fully adjusted models,the corresponding ORs for new-onset high waist circumference(WC),low high-density lipoprotein cholesterol(HDL-C)levels,high triglycerides(TG)levels,high blood pressure(BP),and high blood glucose levels were 1.16(1.13-1.19),1.19(1.16-1.22),1.25(1.22-1.28),1.27(1.23-1.31),and 1.21(1.18-1.24),respectively.Cholecystectomy was an independent risk factor of incident MetS,after adjusting for potential confounding factors.In the subgroup analyses,the cholecystectomy group had a higher risk of MetS than the control group in subjects without hypertension or dyslipidemia,respectively.Conclusions:In this large,population-based study,cholecystectomy was associated with an increased risk of developing MetS,independent of other confounding factors.Therefore,careful monitoring of metabolic variables and long-term follow-up are required to evaluate MetS risk after cholecystectomy.展开更多
Phytochrome-dependent light signaling has been studied in several fungi.In Aspergillus nidulans lightstimulated phytochrome activates the high-osmolarity glycerol(HOG)signaling pathway and thereby controls the express...Phytochrome-dependent light signaling has been studied in several fungi.In Aspergillus nidulans lightstimulated phytochrome activates the high-osmolarity glycerol(HOG)signaling pathway and thereby controls the expression of a large number of genes,many of which are related to stress responses.In a genome-wide expression analysis in A.nidulans we found that phytochrome,fph A,is under strict expression control of the central regulator of the sulfur-starvation response,Met R.This transcriptional regulator is required for the expression of genes involved in inorganic sulfur assimilation.In the presence of organic sulfur,Met R is probably ubiquitinated and possibly degraded and the transcription of sulfur-assimilation genes,e.g.,sulfate permease,is turned off.The expression analysis described here revealed,however,that Met R additionally controls the expression of hundreds of genes,many of which are required for secondary metabolite production.We also show that met R mutation phenocopies fph A deletion,and five other histidine-hybrid kinases are down-regulated in the met R1 mutant.Furthermore,we found that light and phytochrome regulate the expression of at least three carbon–sulfur hydrolases.This work is a further step towards understanding the interplay between light sensing and metabolic pathways.展开更多
A Chinese Compilation of Physical Activities was compiled to estimate the energy costs of physical activities(PAs)using data on adults aged 18–64.Data were obtained from published articles and laboratory measurements...A Chinese Compilation of Physical Activities was compiled to estimate the energy costs of physical activities(PAs)using data on adults aged 18–64.Data were obtained from published articles and laboratory measurements.Databases,including PubMed,Embase,Scopus,Ebsco,Web of Science,Chinese National Knowledge Infrastructure,Wan Fang Data,National Science and Technology Report Service,Public Health Scientific Data were searched to collect data from inception to January 2022,on energy expenditure associated with PA in the healthy Chinese population.Two reviewers independently screened the literature and extracted,classified,and summarized data.Data were measured for 36 PAs using indirect calorimetry.Detailed descriptions of specific activities and metabolic equivalent values were provided by summarizing 241 physical activities in 13 categories.The first edition of the Chinese Compilation of PAs in Healthy Adults Aged 18–64(CCPA)was created.It provides valuable resources for people who regularly engage in physical exercise,researchers,educators,fitness professionals,and health or commercial sectors to quickly obtain various PA MET intensities.In the future,the energy expenditure of various PAs of different ages within the Chinese population can be measured based on the CCPA.展开更多
The Doppler effect can be defined as the frequency shift suffered by a wave phenomenon, when there is a difference in relative speed between the waves generated and their source. We know that it occurs in the case of ...The Doppler effect can be defined as the frequency shift suffered by a wave phenomenon, when there is a difference in relative speed between the waves generated and their source. We know that it occurs in the case of mechanical and electromagnetic waves. We propose to generalize the Doppler effect to the case of frequency changes of certain oscillatory variables in biology before and after puberty, starting from the basis that a metabolically accelerated system is equivalent to a mechanically accelerated system. We then established the following objectives: To verify if there is an average difference in heart and respiratory rates, before and after puberty. To verify the association of these frequency differences with the metabolic activity estimated as basal metabolic rate or BMR. We studied heart and respiratory rate data from healthy people of both sexes, verifying the frequency distribution before and after puberty. We also study the relationship of the frequency distribution with the evolution of the basal metabolic rate throughout life. Analysis of the results shows that the highest heart and respiratory rates occur before puberty, while the lowest rates occur after puberty. A high correlation of the evolution of the variables studied with the evolution of the metabolic acceleration of the system throughout life is also evident. Taking into account that a mechanically accelerated system is equivalent to a metabolically accelerated system, we can conclude that the frequency distribution found is the expression of a generalization of the Doppler effect in the case of biological physical systems.展开更多
Safety assessment of genetically modified organisms (GMOs) is a contentious topic. Proponents of GMOs assert that GMOs are safe since the FDA’s policy of substantial equivalence considers GMOs “equivalent” to their...Safety assessment of genetically modified organisms (GMOs) is a contentious topic. Proponents of GMOs assert that GMOs are safe since the FDA’s policy of substantial equivalence considers GMOs “equivalent” to their non-GMO counterparts, and argue that genetic modification (GM) is simply an extension of a “natural” process of plant breeding, a form of “genetic modification”, though done over longer time scales. Anti-GMO activists counter that GMOs are unsafe since substantial equivalence is unscientific and outdated since it originates in the 1970s to assess safety of medical devices, which are not comparable to the complexity of biological systems, and contend that targeted GM is not plant breeding. The heart of the debate appears to be on the methodology used to determine criteria for substantial equivalence. Systems biology, which aims to understand complexity of the whole organism, as a system, rather than just studying its parts in a reductionist manner, may provide a framework to determine appropriate criteria, as it recognizes that GM, small or large, may affect emergent properties of the whole system. Herein, a promising computational systems biology method couples known perturbations on five biomolecules caused by the CP4 EPSPS GM of Glycine max L. (soybean), with an integrative model of C1 metabolism and oxidative stress (two molecular systems critical to plant function). The results predict significant accumulation of formaldehyde and concomitant depletion of glutathione in the GMO, suggesting how a “small” and single GM creates “large” and systemic perturbations to molecular systems equilibria. Regulatory agencies, currently reviewing rules for GMO safety, may wish to adopt a systems biology approach using a combination of in silico, computational methods used herein, and subsequent targeted experimental in vitro and in vivo designs, to develop a systems understanding of “equivalence” using biomarkers, such as formaldehyde and glutathione, which predict metabolic disruptions, towards modernizing the safety assessment of GMOs.展开更多
文摘The high prevalence of non-communicable diseases is a challenging problem in the Cameroonian population and women are the most affected. The aim of the present study was to determine and compare the prevalence of metabolic abnormalities and metabolic syndrome (MetS) among pre- and post-men- opausal women living in urban areas in Cameroon. A total of 499 women were recruited during a mass health campaign in 2018. Metabolic abnormalities were diagnosed using International Diabetes Federation (IDF) criteria. MetS was defined using IDF criteria with slight modification (total cholesterol used instead of HDL cholesterol). Logistic regression was used to estimate the association between menopausal status and metabolic abnormalities and MetS in age control and non-control models. The prevalence of high waist- to-hip ratio (56.8% vs 36.3%, p < 0.001), elevated fasting blood glucose (glycemia ≥ 100 mg/dL) (38.7% vs 26.9%, p = 0.006);diabetes (14.6% vs 5.7%, p = 0.001);high triglycerides level (29.7% vs 17.1%, p = 0.002);hyperlipidemia (high total cholesterol and or triglycerides levels) (45.0% vs 30.8%, p = 0.002);and elevated blood pressure (67.9% vs 56.1%, p = 0.007) were higher among post-menopausal than pre-menopausal women. The overall prevalence of MetS was 30.1% and post-menopausal women were more affected (33.8% vs 25.0%;p = 0.034). The odds ratio of MetS was 1.888 (95% CI: 1.016 - 3.507) when age was covariate, but was slightly reduced without age control (OR = 1.532;95% CI: 1.031 - 2.275). Metabolic abnormalities seem to be a major health problem among Cameroonian women and menopausal status increased the risk of developing a cardiovascular event.
基金supported by Qianjiang Talents Project of Science Technology Department of Zhejiang Province(project number 2013R10078)(http://www.zjkjt.gov.cn/)Medical and Health Science Research Fund of Zhejiang Province(project number 2013KYB053,2008A034,2007A035,2006A019)(http://www.zjwst.gov.cn)
文摘The microRNA-21 （miR-21） is known to play a major role in cancer progression; however, its function in the cardiovascular system appears to be even more complex and conflicting. To characterize miR-21 expression in the plasma of individuals with or without metabolic syndrome （MetS）, 58 MetS cases and 96 non-MetS controls were investigated.
文摘Binge Eating Disorder (BED) or uncontrolled food consumption is strongly associated with metabolic syndrome as a significant risk factor for health. Metabolic Syndrome (MetS) is characterized by central adiposity, high-density lipoprotein (HDL) cholesterol, hypertriglyceridemia, hypertension, and increased fasting blood glucose. Approximately 9% of the general population suffer from Binge eating disorder (BED), a significant risk factor for Metabolic Syndrome (MetS). This study evaluates the association between Binge Eating disorder (BED) and Metabolic Syndrome (MetS) development through a systematic review. Through analysis of previous studies, we discovered that 93 percent of those with BED had metabolic syndrome parameters in a series of investigations on BED conducted in general care. This systematic review aims to connect the frequency of binge-eating episodes and the development of metabolic syndrome. We have extracted five major studies (n = 5) through screening following systematic review standards.
基金supported by the National Natural Science Foundation of China(32070411,31720103916,31330071,31672494)Natural Science Foundation of Guangdong Province(2019A1515011012)Strategic Priority Research Program of the Chinese Academy of Sciences(XDB11010600)。
文摘The insect brain is the central part of the neurosecretory system,which controls morphology,physiology,and behavior during the insect’s lifecycle.Lepidoptera are holometabolous insects,and their brains develop during the larval period and metamorphosis into the adult form.As the only fully domesticated insect,the Lepidoptera silkworm Bombyx mori experienced changes in larval brain morphology and certain behaviors during the domestication process.Hormonal regulation in insects is a key factor in multiple processes.However,how juvenile hormone(JH)signals regulate brain development in Lepidoptera species,especially in the larval stage,remains elusive.We recently identified the JH receptor Methoprene tolerant 1(Met1)as a putative domestication gene.How artificial selection on Met1 impacts brain and behavioral domestication is another important issue addressing Darwin’s theory on domestication.Here,CRISPR/Cas9-mediated knockout of Bombyx Met1 caused developmental retardation in the brain,unlike precocious pupation of the cuticle.At the whole transcriptomelevel,theecdysteroid(20-hydroxyecdysone,20 E)signaling and downstream pathways were overactivated in the mutant cuticle but not in the brain.Pathways related to cell proliferation and specialization processes,such as extracellular matrix(ECM)-receptor interaction and tyrosine metabolism pathways,were suppressed in the brain.Molecular evolutionary analysis and in vitro assay identified an amino acid replacement located in a novel motif under positive selection in B.mori,which decreased transcriptional binding activity.The B.mori MET1 protein showed a changed structure and dynamic features,as well as a weakened co-expression gene network,compared with B.mandarina.Based on comparative transcriptomic analyses,we proposed a pathway downstream of JH signaling(i.e.,tyrosine metabolism pathway)that likely contributed to silkworm larval brain development and domestication and highlighted the importance of the biogenic amine system in larval evolution during silkworm domestication.
基金This work was supported by grants from the Three-year Action Program of Shanghai Municipality for Strengthening the Construction of the Public Health System(2015-2017)(No.GWIV-27.7).
文摘Background:With lifestyle modification and over-nutrition,the prevalence of nonalcoholic fatty liver disease(NAFLD)has been increasing annually.Here we aimed to assess the updated prevalence of NAFLD,and to evaluate the association of NAFLD with metabolic abnormalities according to gender,body mass index and age.Methods:A population-based cross-sectional study was conducted in Shanghai from December 2016 to July 2017.With a three-stage stratified sampling strategy,3,717 eligible participants were enrolled for the analysis.Results:In total,1,217 subjects(32.7%)had NAFLD.Among them,400(16.3%)of the nonobese and 817(65.0%)of the obese subjects had NAFLD.The prevalence of NAFLD was increased according to the quartiles of age and waist circumference(WC)in the nonobese subjects.Females with nonobese NAFLD had 1.6-,2.6-,2.0-,2.3-and 3.3-fold higher risks for metabolic syndrome,diabetes mellitus,hyperglycemia,hypertriglycerdemia(high TG)and low high-density lipoprotein cholesterol than obese subjects without NAFLD,respectively.Males had comparable metabolic profiles in both groups,except for a 2.0-fold higher risk of high TG in nonobese NAFLD subjects compared with obese subjects without NAFLD.More impressively,the homeostasis metabolic assessment insulin resistance index was comparable between the two groups.Conclusions:The increase of age and WC had significant impact on the risk of NAFLD in nonobese subjects.The presence of NAFLD in nonobese subjects increased the risk of metabolic diseases than obese subjects without NAFLD,especially in female.
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(Ministry of Science and Information and Communications Technology)(No.2017R1D1A1B03029575,to Jun Goo Kang)supported by Hallym University Research Fund 2021(No.HURF-2021-45,to Ji Hye Huh).
文摘Background:Cholecystectomy is a common surgical procedure to treat symptomatic gallstones;however,the long-term outcomes after cholecystectomy are unknown.Therefore,we aimed to investigate whether incident metabolic syndrome(MetS)is associated with cholecystectomy through a large,population-based,longitudinal study.Methods:Subjects aged≥20 years who underwent cholecystectomy from 2010 to 2014(n=76,485)and controls(n=76,485),matched for age and sex,were identified from the Korean National Health Insurance Corporation.Cox proportional hazards analyses were performed to evaluate the association between cases and incident MetS,and hazard ratios and 95% confidence intervals(CIs)were calculated.Results:A total of 152,970 patients were included.Mean age was 52.47±12.76 years,and 50.65% of participants were male.During the follow-up period,there were 38,979(25.48%)newly diagnosed MetS cases in the study participants.The risk of MetS in the cholecystectomy group was approximately 20% higher than that in the control group[adjusted odds ratio(OR),1.20;95%CI:1.17-1.23].In the fully adjusted models,the corresponding ORs for new-onset high waist circumference(WC),low high-density lipoprotein cholesterol(HDL-C)levels,high triglycerides(TG)levels,high blood pressure(BP),and high blood glucose levels were 1.16(1.13-1.19),1.19(1.16-1.22),1.25(1.22-1.28),1.27(1.23-1.31),and 1.21(1.18-1.24),respectively.Cholecystectomy was an independent risk factor of incident MetS,after adjusting for potential confounding factors.In the subgroup analyses,the cholecystectomy group had a higher risk of MetS than the control group in subjects without hypertension or dyslipidemia,respectively.Conclusions:In this large,population-based study,cholecystectomy was associated with an increased risk of developing MetS,independent of other confounding factors.Therefore,careful monitoring of metabolic variables and long-term follow-up are required to evaluate MetS risk after cholecystectomy.
基金supported by the German Science Foundation(DFG Fi459/19-1)。
文摘Phytochrome-dependent light signaling has been studied in several fungi.In Aspergillus nidulans lightstimulated phytochrome activates the high-osmolarity glycerol(HOG)signaling pathway and thereby controls the expression of a large number of genes,many of which are related to stress responses.In a genome-wide expression analysis in A.nidulans we found that phytochrome,fph A,is under strict expression control of the central regulator of the sulfur-starvation response,Met R.This transcriptional regulator is required for the expression of genes involved in inorganic sulfur assimilation.In the presence of organic sulfur,Met R is probably ubiquitinated and possibly degraded and the transcription of sulfur-assimilation genes,e.g.,sulfate permease,is turned off.The expression analysis described here revealed,however,that Met R additionally controls the expression of hundreds of genes,many of which are required for secondary metabolite production.We also show that met R mutation phenocopies fph A deletion,and five other histidine-hybrid kinases are down-regulated in the met R1 mutant.Furthermore,we found that light and phytochrome regulate the expression of at least three carbon–sulfur hydrolases.This work is a further step towards understanding the interplay between light sensing and metabolic pathways.
基金Funding was provided by the National Key R&D Program of China(2018YFC2000600).
文摘A Chinese Compilation of Physical Activities was compiled to estimate the energy costs of physical activities(PAs)using data on adults aged 18–64.Data were obtained from published articles and laboratory measurements.Databases,including PubMed,Embase,Scopus,Ebsco,Web of Science,Chinese National Knowledge Infrastructure,Wan Fang Data,National Science and Technology Report Service,Public Health Scientific Data were searched to collect data from inception to January 2022,on energy expenditure associated with PA in the healthy Chinese population.Two reviewers independently screened the literature and extracted,classified,and summarized data.Data were measured for 36 PAs using indirect calorimetry.Detailed descriptions of specific activities and metabolic equivalent values were provided by summarizing 241 physical activities in 13 categories.The first edition of the Chinese Compilation of PAs in Healthy Adults Aged 18–64(CCPA)was created.It provides valuable resources for people who regularly engage in physical exercise,researchers,educators,fitness professionals,and health or commercial sectors to quickly obtain various PA MET intensities.In the future,the energy expenditure of various PAs of different ages within the Chinese population can be measured based on the CCPA.
文摘The Doppler effect can be defined as the frequency shift suffered by a wave phenomenon, when there is a difference in relative speed between the waves generated and their source. We know that it occurs in the case of mechanical and electromagnetic waves. We propose to generalize the Doppler effect to the case of frequency changes of certain oscillatory variables in biology before and after puberty, starting from the basis that a metabolically accelerated system is equivalent to a mechanically accelerated system. We then established the following objectives: To verify if there is an average difference in heart and respiratory rates, before and after puberty. To verify the association of these frequency differences with the metabolic activity estimated as basal metabolic rate or BMR. We studied heart and respiratory rate data from healthy people of both sexes, verifying the frequency distribution before and after puberty. We also study the relationship of the frequency distribution with the evolution of the basal metabolic rate throughout life. Analysis of the results shows that the highest heart and respiratory rates occur before puberty, while the lowest rates occur after puberty. A high correlation of the evolution of the variables studied with the evolution of the metabolic acceleration of the system throughout life is also evident. Taking into account that a mechanically accelerated system is equivalent to a metabolically accelerated system, we can conclude that the frequency distribution found is the expression of a generalization of the Doppler effect in the case of biological physical systems.
文摘Safety assessment of genetically modified organisms (GMOs) is a contentious topic. Proponents of GMOs assert that GMOs are safe since the FDA’s policy of substantial equivalence considers GMOs “equivalent” to their non-GMO counterparts, and argue that genetic modification (GM) is simply an extension of a “natural” process of plant breeding, a form of “genetic modification”, though done over longer time scales. Anti-GMO activists counter that GMOs are unsafe since substantial equivalence is unscientific and outdated since it originates in the 1970s to assess safety of medical devices, which are not comparable to the complexity of biological systems, and contend that targeted GM is not plant breeding. The heart of the debate appears to be on the methodology used to determine criteria for substantial equivalence. Systems biology, which aims to understand complexity of the whole organism, as a system, rather than just studying its parts in a reductionist manner, may provide a framework to determine appropriate criteria, as it recognizes that GM, small or large, may affect emergent properties of the whole system. Herein, a promising computational systems biology method couples known perturbations on five biomolecules caused by the CP4 EPSPS GM of Glycine max L. (soybean), with an integrative model of C1 metabolism and oxidative stress (two molecular systems critical to plant function). The results predict significant accumulation of formaldehyde and concomitant depletion of glutathione in the GMO, suggesting how a “small” and single GM creates “large” and systemic perturbations to molecular systems equilibria. Regulatory agencies, currently reviewing rules for GMO safety, may wish to adopt a systems biology approach using a combination of in silico, computational methods used herein, and subsequent targeted experimental in vitro and in vivo designs, to develop a systems understanding of “equivalence” using biomarkers, such as formaldehyde and glutathione, which predict metabolic disruptions, towards modernizing the safety assessment of GMOs.
