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Nakae R, Fujiki Y, Takayama Y, Kanaya T, Igarashi Y, Suzuki G, Naoe Y, Yokobori S. Age-Related Differences in the Time Course of Coagulation and Fibrinolytic Parameters in Patients with Traumatic Brain Injury. Int J Mol Sci 2020; 21:ijms21165613. [PMID: 32764459 PMCID: PMC7460662 DOI: 10.3390/ijms21165613] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 07/30/2020] [Accepted: 08/01/2020] [Indexed: 12/04/2022] Open
Abstract
Coagulopathy and older age are common and well-recognized risk factors for poorer outcomes in traumatic brain injury (TBI) patients; however, the relationships between coagulopathy and age remain unclear. We hypothesized that coagulation/fibrinolytic abnormalities are more pronounced in older patients and may be a factor in poorer outcomes. We retrospectively evaluated severe TBI cases in which fibrinogen and D-dimer were measured on arrival and 3–6 h after injury. Propensity score-matched analyses were performed to adjust baseline characteristics between older patients (the “elderly group,” aged ≥75 y) and younger patients (the “non-elderly group,” aged 16–74 y). A total of 1294 cases (elderly group: 395, non-elderly group: 899) were assessed, and propensity score matching created a matched cohort of 324 pairs. Fibrinogen on admission, the degree of reduction in fibrinogen between admission and 3–6 h post-injury, and D-dimer levels between admission and 3–6 h post-injury were significantly more abnormal in the elderly group than in the non-elderly group. On multivariate logistic regression analysis, independent risk factors for poor prognosis included low fibrinogen and high D-dimer levels on admission. Posttraumatic coagulation and fibrinolytic abnormalities are more severe in older patients, and fibrinogen and D-dimer abnormalities are negative predictive factors.
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Affiliation(s)
- Ryuta Nakae
- Department of Emergency and Critical Care Medicine, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan; (Y.T.); (T.K.); (Y.I.); (S.Y.)
- Correspondence: ; Tel.: +81-3-3822-2131
| | - Yu Fujiki
- Emergency and Critical Care Center, Kawaguchi Municipal Medical Center, 180, Nishiaraijuku, Kawaguchi-shi, Saitama 333-0833, Japan; (Y.F.); (G.S.); (Y.N.)
| | - Yasuhiro Takayama
- Department of Emergency and Critical Care Medicine, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan; (Y.T.); (T.K.); (Y.I.); (S.Y.)
| | - Takahiro Kanaya
- Department of Emergency and Critical Care Medicine, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan; (Y.T.); (T.K.); (Y.I.); (S.Y.)
| | - Yutaka Igarashi
- Department of Emergency and Critical Care Medicine, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan; (Y.T.); (T.K.); (Y.I.); (S.Y.)
| | - Go Suzuki
- Emergency and Critical Care Center, Kawaguchi Municipal Medical Center, 180, Nishiaraijuku, Kawaguchi-shi, Saitama 333-0833, Japan; (Y.F.); (G.S.); (Y.N.)
| | - Yasutaka Naoe
- Emergency and Critical Care Center, Kawaguchi Municipal Medical Center, 180, Nishiaraijuku, Kawaguchi-shi, Saitama 333-0833, Japan; (Y.F.); (G.S.); (Y.N.)
| | - Shoji Yokobori
- Department of Emergency and Critical Care Medicine, Nippon Medical School, 1-1-5, Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan; (Y.T.); (T.K.); (Y.I.); (S.Y.)
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Tsai MH, Tsai WP, Liao ST, Liou LB. Anticardiolipin antibodies in various diseases in Taiwan: a retrospective analysis. Lupus 2016; 12:747-53. [PMID: 14596423 DOI: 10.1191/0961203303lu459oa] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The goals of this study are to determine the frequency of anticardiolipinantibodies (ACA) in patients with various diseases and to evaluate the clinical significance of ACA in Taiwan. We collected 690 patients from ACA laboratory records. They were divided into eight groups in order to compare ACA percentages. Positive rates of ACA in different disease groups were below 20%, except for 38.2% in autoimmune diseases with vascular thrombosis. Compared with old stroke, the ACA positivity in young stroke was not significantly different (P 0.482). The positive percentage of lupus anticoagulant (LA) (2.86%) was lower than that of ACA (15.66%) in young stroke (P 0.015). Among patients with pregnancy loss or prematurity, the ACA positivity in lupus patients (44.44%) was higher than without lupus (9.76%; P 0.01). The prevalence of ACA is higher in patients with vascular thrombosis complicated by autoimmune diseases than with thrombosis alone in Taiwan. Young and old stroke do not differ in ACA positivity. Moreover, ACA is more prevalent than LA for young stroke related coagulation.The ACA positivity for pregnancy loss or prematurity is very low in Taiwan. In summary, this is the first report on the frequency of ACA and other coagulation factors in various diseases in Taiwan.
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Affiliation(s)
- M H Tsai
- Division of Rheumatology, Allergy and Immunology, Chang Gung Memorial Hospital, Kwei-Shan Hsiang, Taoyuan County, Taiwan
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Lu J, Huang Y, Wang Y, Li Y, Zhang Y, Wu J, Zhao F, Meng S, Yu X, Ma Q, Song M, Chang N, Bittles AH, Wang W. Profiling plasma peptides for the identification of potential ageing biomarkers in Chinese Han adults. PLoS One 2012; 7:e39726. [PMID: 22802942 PMCID: PMC3389038 DOI: 10.1371/journal.pone.0039726] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 05/25/2012] [Indexed: 12/12/2022] Open
Abstract
Advancing age is associated with cardiovascular disease, diabetes mellitus and cancer, and shows significant inter-individual variability. To identify ageing-related biomarkers we performed a proteomic analysis on 1890 Chinese Han individuals, 1136 males and 754 females, aged 18 to 82 years, using weak cation exchange magnetic bead based MALDI-TOF-MS analysis. The study identified 44 peptides which varied in concentration in different age groups. In particular, apolipoprotein A-I (ApoA1) concentration gradually increased between 18 to 50 years of age, the levels of fibrinogen alpha (FGA) decreased over the same age span, while albumin (ALB) was significantly degraded in middle-aged individuals. In addition, the plasma peptide profiles of FGA and four other unidentified proteins were found to be gender-dependent. Plasma proteins such as FGA, ALB and ApoA1 are significantly correlated with age in the Chinese Han population and could be employed as indicative ageing-related biomarkers.
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Affiliation(s)
- Jiapeng Lu
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
| | - Yuqing Huang
- Department of Chest Surgery, Beijing Haidian Hospital, Beijing, People’s Republic of China
| | - Youxin Wang
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
| | - Yan Li
- Bioyong Technologies Inc, Beijing, People’s Republic of China
| | - Yujun Zhang
- Bioyong Technologies Inc, Beijing, People’s Republic of China
| | - Jingjing Wu
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
| | - Feifei Zhao
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
| | - Shijiao Meng
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
| | - Xinwei Yu
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
| | - Qingwei Ma
- Bioyong Technologies Inc, Beijing, People’s Republic of China
| | - Manshu Song
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
- * E-mail: (MS); (NC); (WW)
| | - Naibai Chang
- Department of Hematology, Beijing Hospital, Beijing, People’s Republic of China
- * E-mail: (MS); (NC); (WW)
| | - Alan H. Bittles
- School of Medical Sciences, Edith Cowan University, Perth, Australia
- Centre for Comparative Genomics, Murdoch University, Perth, Australia
| | - Wei Wang
- School of Public Health and Family Medicine, Capital Medical University, Beijing, People’s Republic of China
- College of Life Sciences, Graduate University of Chinese Academy of Sciences, Beijing, People’s Republic of China
- School of Medical Sciences, Edith Cowan University, Perth, Australia
- Municipal Key Laboratory of Clinical Epidemiology, Beijing, People’s Republic of China
- * E-mail: (MS); (NC); (WW)
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Rogowski O, Shapira I, Peretz H, Berliner S. Glycohaemoglobin as a determinant of increased fibrinogen concentrations and low-grade inflammation in apparently healthy nondiabetic individuals. Clin Endocrinol (Oxf) 2008; 68:182-9. [PMID: 17803696 DOI: 10.1111/j.1365-2265.2007.03017.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To determine the potential role of glycohaemoglobin as a possible determinant of increased fibrinogen concentrations and low-grade inflammation in a group of apparently healthy, nondiabetic individuals not expressing clinically overt atherothrombosis. DESIGN AND MAIN OUTCOME MEASURES We performed a cross-sectional analysis of the concentrations of glycohaemoglobin alongside the concentrations of quantitative fibrinogen and high-sensitivity C-reactive protein (hs-CRP). In all, 1511 males and 757 apparently healthy females, without diabetes mellitus or clinically evident atherothrombotic disease, were enrolled in the study during their routine annual health check-up. RESULTS Glycohaemoglobin entered the linear regression models as a significant determinant of quantitative fibrinogen in both genders and of hs-CRP in men. We found this to be true even following the inclusion of multiple variables known to influence the intensity of low-grade inflammation, such as age, gender, waist circumference, body mass index, blood pressure, medications, hormone therapy, glucose levels (normal or impaired fasting glucose), smoking habits, family history of coronary artery disease, lipid profile as well as alcohol consumption and sports intensity. We found glycohaemoglobin to be a significant determinant of fibrinogen concentrations in apparently healthy nondiabetic individuals not yet presenting with evident atherothrombosis. CONCLUSIONS This observation supports the idea that glycohaemoglobin might have an effect on fibrinogen concentrations in both genders and on hs-CRP in men. Moreover, our results suggest that glycohaemoglobin should be perceived as a continuous variable without a 'normal' cut-off point, as it may exhibit a detrimental role even when present in relatively low levels.
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Affiliation(s)
- Ori Rogowski
- Department of Medicine 'D', Tel Aviv Sourasky Medical Center and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Hernández EM, Phang TL, Wen X, Franses EI. Adsorption and direct probing of fibrinogen and sodium myristate at the air/water interface. J Colloid Interface Sci 2007; 250:271-80. [PMID: 16290663 DOI: 10.1006/jcis.2002.8360] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2001] [Accepted: 03/15/2002] [Indexed: 11/22/2022]
Abstract
Fibrinogen (FB), a serum protein, is considered a major inhibitor of lung surfactant function at the lining layer of the alveoli. In this study, the adsorption of aqueous bovine FB at the air/water interface was investigated with tensiometry and directly probed for the first time with ellipsometry and infrared reflection adsorption spectroscopy (IRRAS). The tension results show that FB has moderate surface activity. The surface densities of FB were calculated by using two different ellipsometry models to range from 3+/-0.2 to 17+/-2 mg/m2, for 7.5 to 750 ppm of FB in water at 25 degrees C. Although FB at concentrations from 75 to 750 ppm reached about the same steady surface tension value, the surface densities at 750 ppm FB were substantially larger. The same techniques were used for studying aqueous mixtures of 7.5 to 750 ppm FB with 2 mM of sodium myristate (SM) to investigate a possible interaction of the SM with the protein. The behavior of the FB/SM mixtures was found to be close to that of SM alone. The surface tension of the FB/SM mixtures reached values less than 10 mN/m under surface area oscillation at 20 or 80 rpm. These results and the ellipsometry and the IRRAS results indicate that at a concentration of 2 mM SM, FB, up to 750 ppm, does not inhibit the surfactant surface-tension-lowering function. In certain cases the results demonstrate that FB and SM may act cooperatively in lowering the surface tension.
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Affiliation(s)
- Erika M Hernández
- School of Chemical Engineering, Purdue University, West Lafayette, Indiana, 47907-1283, USA
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Coppola L, Guastafierro S, Sagristani M, Coppola A, Nasuti A, Ruggiero L, De Biase M, Tirelli A, Gombos G. Decreased Hemoglobin Levels Are Associated with Higher Plasma Level of Fibrinogen, Irrespective of Age. Am J Med Sci 2007; 333:154-60. [PMID: 17496733 DOI: 10.1097/maj.0b013e3180312547] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Increased plasma levels of fibrinogen are been associated with an increased risk of cardiovascular accident. We aimed at verifying whether the changes of fibrinogen levels are associated with red blood cell (and/or hemoglobin) concentration. METHODS A group of 381 carefully selected healthy volunteers (219 male and 162 female), aged from 18 to 101 years, were enrolled in this study. Fasting blood samples were taken and all measurements (fibrinogen plasma level, whole blood viscosity, hemoglobin concentration, hematocrit value, red blood cell and white blood cell count, platelet count, glucose, total cholesterol and triglycerides plasma concentration, and C-reactive protein level) were obtained with standardized methodology using appropriate equipment, procedures, and controls. RESULTS AND CONCLUSIONS In the male but not in the female group, plasma fibrinogen concentration inversely correlated with hemoglobin (P < 0.0001) and hematocrit value (P < 0.01). In a post hoc analysis, plasma fibrinogen level inversely correlated with hemoglobin in the subgroup of the 93 premenopausal women and directly correlated with age and inversely correlated with platelet count in the subgroup of the 69 postmenopausal women. Results of multiple regression analysis revealed that in all the subjects, except in the postmenopausal women, hemoglobin level is an independent predictor of fibrinogen plasma level. Considering the physiopathologic role of increased plasma fibrinogen concentration and the scarcity of pharmacologic approaches to decrease its level, these findings could be important in designing a preventive therapy of cardiovascular disease.
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Affiliation(s)
- Ludovico Coppola
- Department of Geriatrics and Metabolic Diseases, Second University of Naples, Naples, Italy.
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Drenos F, Miller GJ, Humphries SE. Increase of Plasma Fibrinogen Levels and Variability with Age in a Sample of Middle Aged Healthy Men. Ann Hum Genet 2007; 71:43-53. [PMID: 16999842 DOI: 10.1111/j.1469-1809.2006.00302.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
According to predictions from the current theoretical models for ageing the heterogeneity of the population is increasing with increasing age. Although the direct observation of such changes in humans is extremely difficult, supporting evidence should be identifiable in key biomarkers associated with health and mortality. Using data from the Northwick Park Heart Study II of 3052 healthy middle-aged men (mean 56 years of age, range 49-69 years), with 5 annual measures of CHD risk factors, ageing effects were tested for plasma fibrinogen, cholesterol and triglycerides. Fibrinogen levels increased with age (p < 0.0001), while cholesterol showed a decrease, and triglycerides did not show any change with age. There was a significant increase in the variance of fibrinogen with age (p < 0.0007) but not for cholesterol or triglycerides. The raising effect on fibrinogen levels associated with the A allele of the FIBB - 455G>A promoter variant also decreased with age (p = 0.005). The age-associated changes observed in the fibrinogen variability and the association of phenotype to genotype are discussed in light of the evolutionary theory, and their implications are considered.
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Affiliation(s)
- F Drenos
- Centre for Cardiovascular Genetics, Department of Medicine, British Heart Foundation Laboratories, Royal Free and University College Medical School, London WC1E 6JF, UK.
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Abstract
Smoking is a major cardiovascular risk factor and cause of death. Diabetes mellitus is also associated with an increased mortality and morbidity. Evidence concerning whether smoking increases the incidence of diabetes remains conflicting. Glycaemic status and smoking habits were analysed in 3718 Chinese subjects in order to assess the possible association between smoking and risk of diabetes in the Chinese population. The World Health Organisation 1998 criteria were used for the diagnosis of glucose intolerance. Smoking was defined as current cigarette smoking or ex-smoking without regard to daily consumption. The smoking habits of the studied subjects were correlated with glycaemic status. There were 3003 (80.8%) women and 715 (19.2%) men. The mean age (SD) was 38.4 (12.8) years (median 35.0, range 12-88 years). Of the 3718 subjects, 786 (21.1%) had diabetes, 708 (19.1%) had impaired glucose tolerance, and 2224 (59.8%) had normal results. Of the 3003 women, only 87 (2.9%) were smokers. The female smokers were younger, heavier, and had higher alcohol consumption than non-smokers. The prevalence of diabetes was similar between female smokers and non-smokers after adjustment for age, body mass index, family history of diabetes, and alcohol. Of the 715 men, 175 (24.5%) were smokers. The male smokers were younger, had lower blood pressure, and higher alcohol consumption. After adjustment for age, body mass index, family history of diabetes and alcohol, the male smokers had lower blood pressure, higher one hour plasma glucose, and more diabetes. Using logistic regression analysis (stepwise forward) with age, body mass index, alcohol, smoking, and family history of diabetes as independent variables to predict the risk of having diabetes, age and body mass index are independently associated with diabetes in both men and women. In addition, smoking is independently associated with the risk of diabetes in men, the odds ratio (95% confidence interval, CI) being 1.705 (1.106 to 2.630). Family history of diabetes is independently associated with the risk of diabetes in women, and the odds ratio (95% CI) is 1.643 (1.314, to 2.053). In conclusion, it was found that smoking is independently associated with diabetes after adjustment for age, body mass index, alcohol, and family history of diabetes in Hong Kong Chinese men, the odds ratio being 1.7. The prevalence of smoking in Hong Kong Chinese women is low and its association with diabetes is inconclusive.
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Affiliation(s)
- G T Ko
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong.
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Lam TH, Liu LJ, Janus ED, Lam KS, Hedley AJ. Fibrinogen, other cardiovascular risk factors and diabetes mellitus in Hong Kong: a community with high prevalence of Type 2 diabetes mellitus and impaired glucose tolerance. Diabet Med 2000; 17:798-806. [PMID: 11131105 DOI: 10.1046/j.1464-5491.2000.00384.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS To determine the prevalence of Type 2 diabetes mellitus and impaired glucose tolerance (IGT) and their relationships to fibrinogen and other cardiovascular risk factors in Hong Kong Chinese. METHODS A probability sample of 1,316 men and 1,348 women aged 25-74 years were examined in a population-based cross-sectional study. RESULTS A total of 3.0% (95% confidence interval 2.1-3.9) of men had previously diagnosed (known) and 6.4% (5.0-7.8) newly diagnosed (unknown) diabetes, 14.4% (12.4-16.5) had IGT and 79.2% were normal by 1985 WHO diagnostic criteria; corresponding prevalences in women were 3.7% (2.7-4.7), 5.9% (4.6-7.2), 17% (14.8-19.2) and 73.4%. The age-standardized prevalence of Type 2 diabetes for the 35-64 age group was 9.5% (7.5-11.6) in men and 10.2% (8.0-12.4) in women. Age-adjusted mean fibrinogen levels in these four groups (normal/IGT/unknown diabetes/known diabetes) with decreasing degrees of glucose tolerance (diabetes status) were 2.80, 2.57, 2.51 and 2.47 g/l (P = 0.003) in men, and 2.86, 2.72, 2.67, 2.61 g/l (P = 0.005) in women. Age, obesity, systolic blood pressure and triglycerides were significantly associated with diabetes status in both sexes, fibrinogen in men only and high density lipoprotein cholesterol negatively in women. CONCLUSIONS The prevalence of Type 2 diabetes mellitus was very high especially in older subjects, and fibrinogen was associated with increasing glucose intolerance in men but not in women. The detection and better control of cardiovascular risk factors, particularly hypertension in this developed Chinese community with a high prevalence of diabetes and glucose intolerance, is particularly important.
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Affiliation(s)
- T H Lam
- Department of Community Medicine, The University of Hong Kong.
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Affiliation(s)
- H H Vorster
- Department of Nutrition, Potchefstroom Universiteit, Republic of South Africa.
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Lam TH, Liu LJ, Janus ED, Bourke C, Hedley AJ. The relationship between fibrinogen and other coronary heart disease risk factors in a Chinese population. Atherosclerosis 1999; 143:405-13. [PMID: 10217371 DOI: 10.1016/s0021-9150(98)00294-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Few studies have examined fibrinogen in Chinese populations in which the incidence of coronary heart disease (CHD) is lower than that in the West. This study aimed to examine the relationship between fibrinogen and other CHD risk factors in Hong Kong Chinese. Fibrinogen was measured by the Clauss method in 1359 men and 1405 women aged 25-74 years, randomly selected from the Hong Kong population. Mean fibrinogen level increased with age, from 2.22 g/l in those aged 25-34 years to 2.76 g/l in 65-74 years in men, and from 2.42 to 2.94 g/l respectively in women. The most important factors associated with fibrinogen were age, obesity and blood lipid levels in both genders. In men, smoking was associated with higher fibrinogen levels and cessation of smoking with lower levels. Prospective studies are needed to examine the role of fibrinogen in CHD in Chinese and other Asian populations.
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Affiliation(s)
- T H Lam
- Department of Community Medicine, The University of Hong Kong, Hong Kong.
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12
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Fu A, Nair KS. Age effect on fibrinogen and albumin synthesis in humans. THE AMERICAN JOURNAL OF PHYSIOLOGY 1998; 275:E1023-30. [PMID: 9843745 DOI: 10.1152/ajpendo.1998.275.6.e1023] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A strong association has been reported between atherosclerotic diseases and fibrinogen levels, and a decreased whole body protein synthesis has also been reported with aging. We investigated the effect of age on fractional synthesis rates (FSR) of fibrinogen and albumin in 12 human subjects of young (20-30 yr), middle (45-60 yr), and old (65-79 yr) age by use of L-[1-13C]leucine and L-[15N]phenylalanine as tracers. An age-related decline in FSR of fibrinogen (P < 0.01) was observed with use of both tracers, with the maximal decrease (average 37% with alpha-[13C]ketoisocaproate as the precursor) occurring by middle age and with no further changes thereafter. In contrast, plasma concentrations of fibrinogen increased with age (P < 0.002). There was no age-related change in synthesis rate and concentrations of albumin. An age-related decline in fibrinogen FSR, but not FSR of albumin, indicates a differential effect of age on synthesis rate of these two liver proteins. This study also demonstrated that the increased circulating levels of fibrinogen represent a slower rate of disposal of fibrinogen rather than an increased production rate.
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Affiliation(s)
- A Fu
- Division of Endocrinology, Mayo Clinic and Foundation, Rochester, Minnesota 55905, USA
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