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Gee SE, Ma'ayeh M, Kniss D, Landon MB, Gabbe SG, Rood KM. Glycemic Control and Aspirin Resistance in Patients Taking Low-Dose Aspirin for Pre-eclampsia Prevention. Am J Perinatol 2022; 39:349-353. [PMID: 34856618 DOI: 10.1055/s-0041-1740250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVES To assess the association between aspirin and glycemic control in diabetic, pregnant patients, and the risk for aspirin resistance in those with poor glycemic control across gestation taking low-dose aspirin (LDA) for pre-eclampsia (PEC) prevention. STUDY DESIGN We performed a secondary analysis of samples collected during the Maternal-Fetal Medicine Units trial of LDA for PEC prevention. A subset of insulin-controlled diabetic patient samples on placebo or 60 mg aspirin daily were evaluated. Glycosylated hemoglobin was measured at randomization, mid-second trimester, and third trimester time points. Thromboxane B2 (TXB2) measurements were previously assessed as part of the original study. Primary outcome was the effect of LDA on glycosylated hemoglobin levels compared with placebo across gestation. RESULTS Levels of glycosylated hemoglobin increased across gestation in the placebo group (2,067.7 [interquartile range, IQR: 1,624.6-2,713.5 µg/mL] vs. 2,461.9 [1,767.0-3,209.9 µg/mL] vs. 3,244.3 [2,691.5-4,187.0 µg/mL]; p < 0.01) compared with no difference in levels of glycosylated hemoglobin across gestation in the LDA group (2,186.4 [IQR: 1,462.3-3,097.7 µg/mL] vs. 2,337.1 [1,327.7-5,932.6 µg/mL] vs. 2,532.9 [1,804.9-5,511.8 µg/mL]; p = 0.78). Higher levels of glycosylated hemoglobin were associated with increased TXB2 levels prior to randomization (r = 0.67, p < 0.05). Incomplete TXB2 was higher in pregnancies with increasing levels of glycosylated hemoglobin compared with those with decreasing levels of glycosylated hemoglobin across gestation (69.2 vs. 18.1%, p = 0.02). CONCLUSION LDA exposure may be beneficial to glycemic control in this patient population. Additionally, poor glycemic control is associated with a higher level of TXB2 in diabetic pregnant patients on LDA. Higher doses of aspirin may be required in these patients to prevent development of PEC. KEY POINTS · Low-dose aspirin may improve glycemic control.. · Poor glycemic control increases risk for aspirin resistance.. · Higher doses of aspirin may be required for pre-eclampsia prevention..
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Affiliation(s)
- Stephen E Gee
- Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio
| | - Marwan Ma'ayeh
- Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio
| | - Douglas Kniss
- Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio
| | - Mark B Landon
- Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio
| | - Steven G Gabbe
- Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio
| | - Kara M Rood
- Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio
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Zhang H, Chen H, Wu X, Sun T, Fan M, Tong H, Zhu Y, Yin Z, Sun W, Zhang C, Zheng X, Chen X. Tetramethylpyrazine alleviates diabetes-induced high platelet response and endothelial adhesion via inhibiting NLRP3 inflammasome activation. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 96:153860. [PMID: 34836743 DOI: 10.1016/j.phymed.2021.153860] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/01/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND The inflammatory state of diabetes promotes high platelet response and endothelial adhesion, which are the main risk factors for cardiovascular events. Tetramethylpyrazine (TMP) is an amide alkaloid isolated from the traditional Chinese medicine Rhizoma Ligustici Chuanxiong, which has been widely used in the clinical treatment of ischemic cardiovascular disease. PURPOSE This study aimed to investigate whether TMP could alleviate diabetes-induced high platelet response and endothelial adhesion and the underlying mechanisms. METHODS Type 2 diabetes mellitus (T2DM) rat model was established by high-fat feeding combined with low dose of streptozotocin. Rats in the TMP treatment group were administered with TMP (100 or 200 mg/kg) for 21 days. Cultured human umbilical vein endothelial cells (HUVECs) were stimulated with glucose (5.5 mM) to induce endothelial activation. The NOD-like receptor protein 3 (NLRP3) over- and low-expressing cell models were established via transfection of NLRP3 lentivirus plasmid into HUVECs. INF39 (25 mg/kg), a chemical inhibitor of NLRP3 inflammasome, was used to explore the role of NLRP3 in T2DM associated high platelet response and endothelial adhesion. RESULTS TMP effectively improved the prothrombotic phenotypes and inhibited the expression of vascular inflammatory factors and adhesion molecules in T2DM rats. TMP inhibited NLRP3 inflammasome and reduced the adhesion of HUVECs to platelets and monocytes in vitro. Over-expression of NLRP3 blocked the effect of TMP on HUVECs activation and adhesion, while TMP had no effect on NLRP3 low-expressing HUVECs. The NLRP3 inhibitor INF39 produced similar effects of TMP on diabetes-induced high platelet response, endothelial adhesion and vascular inflammation. CONCLUSION TMP ameliorates diabetes-induced high platelet response and endothelial adhesion via inhibiting NLRP3 inflammasome activation in T2DM rats, which provide a new basis for the clinical prevention and treatment of diabetes-associated cardiovascular events.
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Affiliation(s)
- Haowen Zhang
- College of Health Preservation and Rehabilitation, Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China; Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, QinHuai District, Nanjing 210029, China
| | - Hanyu Chen
- School of Rehabilitation Science, Nanjing Normal University of Special Education, Nanjing 210038, China
| | - Xiang Wu
- Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, QinHuai District, Nanjing 210029, China
| | - Tong Sun
- Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, QinHuai District, Nanjing 210029, China
| | - Manlu Fan
- Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, QinHuai District, Nanjing 210029, China
| | - Huaqin Tong
- Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, QinHuai District, Nanjing 210029, China
| | - Yejin Zhu
- School of Medicine • Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Zhe Yin
- State Key Laboratory of Natural Medicines, Key Laboratory of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, 24 Tongjiaxiang, Gulou District, Nanjing 210009, China
| | - Weixin Sun
- Department of Cardiology, Yancheng TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Yancheng 224000, China
| | - Chao Zhang
- School of Medicine • Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xiao Zheng
- State Key Laboratory of Natural Medicines, Key Laboratory of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, 24 Tongjiaxiang, Gulou District, Nanjing 210009, China.
| | - Xiaohu Chen
- Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, QinHuai District, Nanjing 210029, China.
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Kring C, Rasmussen LM, Lindholt JS, Diederichsen ACP, Vinholt PJ. Platelet aggregation is not altered among men with diabetes mellitus. Acta Diabetol 2020; 57:389-399. [PMID: 31679079 DOI: 10.1007/s00592-019-01438-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 10/18/2019] [Indexed: 12/22/2022]
Abstract
AIMS Platelets are pivotal in arterial thrombosis, and platelet hyperresponsiveness may contribute to the increased incidence of cardiovascular events in diabetes mellitus. Consequently, we hypothesized that increased in vitro platelet aggregation responses exist in men with diabetes mellitus. METHODS The Danish Cardiovascular Screening Trial (DANCAVAS) is a community-based cardiovascular screening trial including men aged 65-74 years. Platelet aggregation was tested using 96-well light transmission aggregometry with thrombin receptor-activating peptide (TRAP), adenosine diphosphate, collagen type 1, arachidonic acid and protease-activated receptor-4 in three concentrations. Further, cardiovascular risk factors and coronary artery calcification (CAC), estimated by CT scans and ankle-brachial index, were obtained. RESULTS Included were 720 men aged 65-74 years, 110 with diabetes mellitus. Overall, there was no difference in platelet aggregation among men with versus without diabetes mellitus when adjusting for or excluding platelet inhibitor treatment and men with established cardiovascular disease (CVD). This was true for all agonists, e.g., 10 µM TRAP-induced platelet aggregation of median 69% (IQR 53-75) versus 70% (IQR 60-76) in men with versus without diabetes mellitus. Platelet aggregation did not correlate with HbA1c or CAC. Men with diabetes mellitus displayed higher CAC, median 257 Agatston units (IQR 74-1141) versus median 111 Agatston units (IQR 6-420) in the remaining individuals, p < 0.0001. CONCLUSIONS Among outpatients with diabetes mellitus, but no CVD and no platelet inhibitor treatment, neither are platelets hyperresponsive in diabetes mellitus, nor is platelet aggregation associated with glycemic status or with the degree of coronary atherosclerosis. TRIAL REGISTRATION ISRCTN12157806.
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Affiliation(s)
- Christian Kring
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Sdr. Boulevard 29, 5000, Odense C, Denmark.
- Centre of Individualized Medicine in Arterial Disease (CIMA), Odense, Denmark.
| | - Lars M Rasmussen
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Sdr. Boulevard 29, 5000, Odense C, Denmark
- Centre of Individualized Medicine in Arterial Disease (CIMA), Odense, Denmark
| | - Jes S Lindholt
- Centre of Individualized Medicine in Arterial Disease (CIMA), Odense, Denmark
- Department of Cardiothoracic and Vascular Surgery, Odense University Hospital, Odense, Denmark
| | - Axel C P Diederichsen
- Centre of Individualized Medicine in Arterial Disease (CIMA), Odense, Denmark
- Department of Cardiology, Odense University Hospital, Odense, Denmark
| | - Pernille J Vinholt
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Sdr. Boulevard 29, 5000, Odense C, Denmark
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Simeone P, Boccatonda A, Liani R, Santilli F. Significance of urinary 11-dehydro-thromboxane B 2 in age-related diseases: Focus on atherothrombosis. Ageing Res Rev 2018; 48:51-78. [PMID: 30273676 DOI: 10.1016/j.arr.2018.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/13/2018] [Accepted: 09/23/2018] [Indexed: 12/13/2022]
Abstract
Platelet activation plays a key role in atherogenesis and atherothrombosis. Biochemical evidence of increased platelet activation in vivo can be reliably obtained through non-invasive measurement of thromboxane metabolite (TXM) excretion. Persistent biosynthesis of TXA2 has been associated with several ageing-related diseases, including acute and chronic cardio-cerebrovascular diseases and cardiovascular risk factors, such as cigarette smoking, type 1 and type 2 diabetes mellitus, obesity, hypercholesterolemia, hyperhomocysteinemia, hypertension, chronic kidney disease, chronic inflammatory diseases. Given the systemic nature of TX excretion, involving predominantly platelet but also extraplatelet sources, urinary TXM may reflect either platelet cyclooxygenase-1 (COX-1)-dependent TX generation or COX-2-dependent biosynthesis by inflammatory cells and/or platelets, or a combination of the two, especially in clinical settings characterized by low-grade inflammation or enhanced platelet turnover. Although urinary 11-dehydro-TXB2 levels are largely suppressed with low-dose aspirin, incomplete TXM suppression by aspirin predicts the future risk of vascular events and death in high-risk patients and may identify individuals who might benefit from treatments that more effectively block in vivo TX production or activity. Several disease-modifying agents, including lifestyle intervention, antidiabetic drugs and antiplatelet agents besides aspirin have been shown to reduce TX biosynthesis. Taken together, these aspects may contribute to the development of promising mechanism-based therapeutic strategies to reduce the progression of atherothrombosis. We intended to critically review current knowledge on both the pathophysiological significance of urinary TXM excretion in clinical settings related to ageing and atherothrombosis, as well as its prognostic value as a biomarker of vascular events.
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Affiliation(s)
- Paola Simeone
- Department of Medicine and Aging, and Center of Aging Science and Translational Medicine (CESI-Met), Via Luigi Polacchi, Chieti, Italy
| | - Andrea Boccatonda
- Department of Medicine and Aging, and Center of Aging Science and Translational Medicine (CESI-Met), Via Luigi Polacchi, Chieti, Italy
| | - Rossella Liani
- Department of Medicine and Aging, and Center of Aging Science and Translational Medicine (CESI-Met), Via Luigi Polacchi, Chieti, Italy
| | - Francesca Santilli
- Department of Medicine and Aging, and Center of Aging Science and Translational Medicine (CESI-Met), Via Luigi Polacchi, Chieti, Italy.
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Karimova A, Hacioğlu Y, Bahtiyar N, Niyazoğlu M, Akbaş F, Yilmaz E, Ulutin T, Onaran I. Increased mitochondrial common deletion in platelets from patients with type 2 diabetes is not associated with abnormal platelet activity or mitochondrial function. Mol Med Rep 2018; 18:3529-3536. [PMID: 30066943 DOI: 10.3892/mmr.2018.9340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 07/07/2018] [Indexed: 11/05/2022] Open
Abstract
The present study examined the presence and frequency of the 4,977‑base pair mitochondrial (mt)DNA (mtDNA4977) deletion in blood platelets, and whether increased mtDNA4977 deletion was associated with abnormal mitochondrial and platelet function in type 2 diabetes mellitus. A total of 66 patients with type 2 diabetes mellitus and 23 healthy subjects were included in the present study. Patients were divided into three subgroups according to glycemic control, and the presence or absence of chronic diabetic complications: i) Good glycemic control [glycated hemoglobin (HbA1c) <7] without complications; ii) poor glycemic control (HbA1c ≥7) without complications; and iii) poor glycemic control (HbA1c ≥7) with complications. mtDNA4977 deletion, mtDNA copy number, adenine nucleotides, mitochondrial membrane potential and P‑selectin expression levels were analyzed in platelets. Although the frequency of mtDNA4977 deletion in platelets of the patient (96.9%) and control groups (95.6%) was extremely similar, the deletion level significantly increased in all the diabetic groups, compared with the healthy control group. However, the data from the present study revealed that an increased deletion frequency in platelets was not associated with disease severity, although there was clear interindividual variability. Furthermore, all other parameters were not significantly different among the groups, and there were no correlations between mtDNA4977 deletion frequency and all other studied parameters for any of the case groups. The results indicated that the mtDNA4977 deletion occurred in platelets, and increased deletion in patients with type 2 diabetes did not have a marked influence on mitochondrial and/or platelet dysfunction, when compared with the non‑diabetic subjects. Further research is required to elucidate the sources of inter‑individual variability observed in certain parameters.
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Affiliation(s)
- Ayla Karimova
- Department of Medical Biology and Genetics, Cerrahpasa Faculty of Medicine, Istanbul University, 34098 Istanbul, Turkey
| | - Yalçin Hacioğlu
- Department of Family Medicine, Istanbul Training and Research Hospital, 34098 Istanbul, Turkey
| | - Nurten Bahtiyar
- Department of Biophysics, Cerrahpasa Faculty of Medicine, Istanbul University, 34098 Istanbul, Turkey
| | - Mutlu Niyazoğlu
- Department of Endocrinology, Istanbul Training and Research Hospital, 34098 Istanbul, Turkey
| | - Fahri Akbaş
- Department of Medical Biology, Faculty of Medicine at Bezmialem Vakif University, 34093 Istanbul, Turkey
| | - Erkan Yilmaz
- Tissue Typing Laboratory, Cerrahpasa Faculty of Medicine, Istanbul University, 34098 Istanbul, Turkey
| | - Turgut Ulutin
- Department of Medical Biology and Genetics, Cerrahpasa Faculty of Medicine, Istanbul University, 34098 Istanbul, Turkey
| | - Ilhan Onaran
- Department of Medical Biology and Genetics, Cerrahpasa Faculty of Medicine, Istanbul University, 34098 Istanbul, Turkey
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Zhang H, Xie H, Zheng X, Chai Y, Tang Z, Chen H, Li F, Christoph H, Chen J, Sun W, Ye H, Wang S, Hao H, Chen X. Salicylic acid retention impairs aspirin reactivity in type 2 diabetes. Eur J Pharmacol 2017; 794:234-245. [DOI: 10.1016/j.ejphar.2016.11.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/22/2016] [Accepted: 11/24/2016] [Indexed: 12/20/2022]
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Bethel MA, Harrison P, Sourij H, Sun Y, Tucker L, Kennedy I, White S, Hill L, Oulhaj A, Coleman RL, Holman RR. Randomized controlled trial comparing impact on platelet reactivity of twice-daily with once-daily aspirin in people with Type 2 diabetes. Diabet Med 2016; 33:224-30. [PMID: 26043186 DOI: 10.1111/dme.12828] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/01/2015] [Indexed: 01/19/2023]
Abstract
AIMS Reduced aspirin efficacy has been demonstrated in people with Type 2 diabetes. Because increased platelet reactivity and/or turnover are postulated mechanisms, we examined whether higher and/or more frequent aspirin dosing might reduce platelet reactivity more effectively. METHODS Participants with Type 2 diabetes (n = 24) but without known cardiovascular disease were randomized in a three-way crossover design to 2-week treatment periods with aspirin 100 mg once daily, 200 mg once daily or 100 mg twice daily. The primary outcome was platelet reactivity, assessed using the VerifyNow(™) ASA method. Relationships between platelet reactivity and aspirin dosing were examined using generalized linear mixed models with random subject effects. RESULTS Platelet reactivity decreased from baseline with all doses of aspirin. Modelled platelet reactivity was more effectively reduced with aspirin 100 mg twice daily vs. 100 mg once daily, but not vs. 200 mg once daily. Aspirin 200 mg once daily did not differ from 100 mg once daily. Aspirin 100 mg twice daily was also more effective than once daily as measured by collagen/epinephrine-stimulated platelet aggregation and urinary thromboxane levels, with a similar trend measured by serum thromboxane levels. No episodes of bleeding occurred. CONCLUSIONS In Type 2 diabetes, aspirin 100 mg twice daily reduced platelet reactivity more effectively than 100 mg once daily, and numerically more than 200 mg once daily. Clinical outcome trials evaluating primary cardiovascular disease prevention with aspirin in Type 2 diabetes may need to consider using a more frequent dosing schedule.
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Affiliation(s)
- M A Bethel
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- Oxford National Institute for Health Research Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - P Harrison
- School of Immunity and Infection, University of Birmingham Medical School, Birmingham, UK
| | - H Sourij
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- Oxford National Institute for Health Research Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - Y Sun
- Peking University People's Hospital, Beijing, People's Republic of China
| | - L Tucker
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- Oxford National Institute for Health Research Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - I Kennedy
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- Oxford National Institute for Health Research Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - S White
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- Oxford National Institute for Health Research Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - L Hill
- Department of Haematology, John Radcliffe Hospital, Oxford, UK
| | - A Oulhaj
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- Oxford National Institute for Health Research Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - R L Coleman
- Diabetes Trials Unit, University of Oxford, Oxford, UK
| | - R R Holman
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- Oxford National Institute for Health Research Biomedical Research Centre, Churchill Hospital, Oxford, UK
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Abstract
Diabetes imparts a substantial increased risk for cardiovascular disease-related mortality and morbidity. Because of this, current medical guidelines recommend prophylactic treatment with once-daily, low-dose aspirin (acetylsalicylic acid) for primary and secondary prevention of cardiovascular (CV) events in high-risk patients. However, only modest reductions in CV events and mortality have been observed with once-daily aspirin treatment in patients with diabetes, including patients with a previous CV event, perhaps because of disparity between aspirin pharmacokinetics and diabetes-related platelet abnormalities. Once-daily aspirin irreversibly inactivates platelets for only a short duration (acetylsalicylic acid half-life, approximately 15-20 minutes), after which time newly generated, active platelets enter the circulation and weaken aspirin's effect. Platelets from patients with diabetes are more reactive and are turned over more rapidly than platelets from normal individuals; the short inhibitory window provided by once-daily aspirin may therefore be insufficient to provide 24-h protection against CV events. Alternative conventional aspirin regimens (e.g. higher daily dose, twice-daily dosing, combination with clopidogrel) and newer formulations (e.g. 24-h, extended-release) have been proposed to overcome the apparent limited efficacy of conventional aspirin in patients with diabetes; however, tolerability concerns and limited clinical efficacy data need to be taken into account when considering the use of such regimens.
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Santilli F, Pignatelli P, Violi F, Davì G. Aspirin for primary prevention in diabetes mellitus: from the calculation of cardiovascular risk and risk/benefit profile to personalised treatment. Thromb Haemost 2015; 114:876-82. [PMID: 26245672 DOI: 10.1160/th15-03-0202] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 05/29/2015] [Indexed: 01/23/2023]
Abstract
Type 2 diabetes mellitus is characterised by persistent thromboxane (TX)-dependent platelet activation, regardless of disease duration. Low-dose aspirin, that induces a permanent inactivation of platelet cyclooxygenase (COX)-1, thus inhibiting TXA2 biosynthesis, should be theoretically considered the drug of choice. The most up-to-date meta-analysis of aspirin prophylaxis in this setting, which includes three trials conducted in patients with diabetes and six other trials in which such patients represent a subgroup within a broader population, reported that aspirin is associated with a non-significant decrease in the risk of vascular events, although the limited amount of available data precludes a precise estimate of the effect size. An increasing body of evidence supports the concept that less-than-expected response to aspirin may underlie mechanisms related to residual platelet hyper-reactivity despite anti-platelet treatment, at least in a fraction of patients. Among the proposed mechanisms, the variable turnover rate of the drug target (platelet COX-1) appears to represent the most convincing determinant of the inter-individual variability in aspirin response. This review intends to develop the idea that the understanding of the determinants of less-than-adequate response to aspirin in certain individuals, although not changing the paradigm of the indication to low-dose aspirin prescription in primary prevention, may help identifying, in terms of easily detectable clinical or biochemical characteristics, individuals who would attain inadequate protection from aspirin, and for whom different strategies should be challenged.
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Affiliation(s)
| | | | | | - Giovanni Davì
- Giovanni Davì, Center of Excellence on Aging, "G. D'Annunzio" University Foundation, Via Luigi Polacchi 11, 66013 Chieti, Italy, Tel: +39 0871 541312, Fax: +39 0871 541261, E-mail:
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Neergaard-Petersen S, Hvas AM, Grove EL, Larsen SB, Gregersen S, Kristensen SD. The Influence of Haemoglobin A1c Levels on Platelet Aggregation and Platelet Turnover in Patients with Coronary Artery Disease Treated with Aspirin. PLoS One 2015; 10:e0132629. [PMID: 26148094 PMCID: PMC4493028 DOI: 10.1371/journal.pone.0132629] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 06/16/2015] [Indexed: 12/23/2022] Open
Abstract
Background Hyperglycaemia may attenuate the antiplatelet effect of aspirin and thereby increase the risk of cardiovascular events. We investigated the influence of increased haemoglobin A1c (HbA1c) levels on platelet aggregation and turnover in a large cohort of patients with coronary artery disease (CAD) with type 2 diabetes, prediabetes or no diabetes. Methods In this observational study, we included 865 stable CAD patients on 75 mg aspirin as mono-therapy of whom 242 patients had type 2 diabetes and were receiving antidiabetic drugs. Among 623 patients without diabetes, we classified 303 patients with prediabetes (HbA1c ≥5.7–6.4% [39–47 mmol/mol]) naive to antidiabetic drugs. Platelet aggregation was evaluated by the Multiplate Analyzer using arachidonic acid and collagen and by the VerifyNow Aspirin. Platelet turnover was evaluated by immature platelets using flow cytometry and platelet activation by soluble P-selectin. Results CAD patients with type 2 diabetes had higher platelet aggregation (all p-values <0.01), platelet turnover (immature platelet count, p<0.01) and platelet activation (p<0.001) than patients without diabetes. CAD patients with prediabetes had increased platelet aggregation (p = 0.02) and platelet count (p = 0.02) compared with patients without diabetes. Increased levels of HbA1c correlated positively with increased platelet aggregation using arachidonic acid (r = 0.19, p<0.0001), collagen (r = 0.10, p<0.01) and VerifyNow (r = 0.15, p<0.0001), and with platelet count (r = 0.08, p = 0.01), immature platelet count (r = 0.11, p<0.001) and soluble P-selectin (r = 0.15, p<0.0001). These associations were mainly evident in non-diabetic and prediabetic CAD patients. Conclusions CAD patients with prediabetes and diabetes may have attenuated antiplatelet effect of aspirin compared with CAD patients without diabetes. This may be related to increased platelet count in patients with prediabetes. Increased levels of HbA1c correlated positively, though weakly, with increased platelet aggregation, platelet turnover and platelet activation.
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Affiliation(s)
| | - Anne-Mette Hvas
- Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark
| | | | | | - Søren Gregersen
- Department of Endocrinology and Internal Medicine MEA, Aarhus University Hospital, Aarhus, Denmark
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Shlomai G, Haran-Appel T, Sella T, Grossman Y, Hauschner H, Rosenberg N, Grossman E. High-risk type-2 diabetes mellitus patients, without prior ischemic events, have normal blood platelet functionality profiles: a cross-sectional study. Cardiovasc Diabetol 2015; 14:80. [PMID: 26068309 PMCID: PMC4465477 DOI: 10.1186/s12933-015-0244-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 06/06/2015] [Indexed: 01/19/2023] Open
Abstract
Background Patients with type 2 diabetes mellitus (DM) display a predisposition for vascular disease. Platelets taken from vasculopathic diabetic patients, show enhanced stimuli-induced activation and aggregation responses. Aspirin remains the cornerstone antiplatelet agent for secondary prevention of vascular complications among diabetic patients, yet evidence of its efficacy and safety in primary prevention are conflicting. Our aim was to assess whether high risk diabetic patients, without previous ischemic events, have abnormal platelet functionality profiles. Methods The study included 82 diabetic patients and 86 matched non-diabetic patients without prior ischemic events nor treatment with anti-platelet medications. Blood samples were analyzed for platelet markers of activation, turnover and leukocyte-platelet interactions. Results Our final analysis included 122 males (74 %), with a mean age of 61 years. Mean platelet volume (MPV) was similar between the diabetic patients and controls (9.2 fL for both). Following activation, PAC-1 binding and P-selectin expression were found comparable between the diabetic patients and controls (83 % versus 81 % and 76 % versus 74 %, respectively). Leukocyte-platelet aggregates (LPAs) were similar between the diabetic patients and controls (18 % versus 17 %, respectively). Neutrophil-platelet aggregates (NPAs) and monocyte-platelet aggregates (MPAs) were also found similar in the diabetic patients and controls. Elevated fasting plasma glucose was associated with increased LPAs rates. Conclusions High risk type-2 diabetes mellitus patients, without prior ischemic events, have normal blood platelet functionality profiles.
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Affiliation(s)
- Gadi Shlomai
- Department of Internal Medicine D and Hypertension Unit, The Chaim Sheba Medical Center, Derech Sheba 1, Tel Hashomer, Ramat-Gan, 52621, Israel. .,The Dr. Pinchas Borenstein Talpiot Medical Leadership Program 2013, Tel-Aviv, Israel. .,Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
| | - Tal Haran-Appel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
| | - Tal Sella
- Department of Oncology, Chaim Sheba Medical Center, Tel Hashomer, Israel.
| | - Yoni Grossman
- Department of Internal Medicine D and Hypertension Unit, The Chaim Sheba Medical Center, Derech Sheba 1, Tel Hashomer, Ramat-Gan, 52621, Israel.
| | - Hagit Hauschner
- Institute of Thrombosis and Hemostasis, Chaim Sheba Medical Center, Tel Hashomer, Israel.
| | - Nurit Rosenberg
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. .,Institute of Thrombosis and Hemostasis, Chaim Sheba Medical Center, Tel Hashomer, Israel.
| | - Ehud Grossman
- Department of Internal Medicine D and Hypertension Unit, The Chaim Sheba Medical Center, Derech Sheba 1, Tel Hashomer, Ramat-Gan, 52621, Israel. .,Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
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Kaplon-Cieslicka A, Postula M, Rosiak M, Peller M, Kondracka A, Serafin A, Trzepla E, Opolski G, Filipiak KJ. Younger age, higher body mass index and lower adiponectin concentration predict higher serum thromboxane B2 level in aspirin-treated patients with type 2 diabetes: an observational study. Cardiovasc Diabetol 2014; 13:112. [PMID: 25123549 PMCID: PMC4149275 DOI: 10.1186/s12933-014-0112-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 07/08/2014] [Indexed: 12/25/2022] Open
Abstract
Background Evidence from the literature suggests diminished acetylsalicylic acid (ASA) treatment efficacy in type 2 diabetes (DM2). High on-aspirin platelet reactivity (HAPR) in DM2 has been linked to poor glycemic and lipid control. However, there are no consistent data on the association between HAPR and insulin resistance or adipose tissue metabolic activity. The aim of this study was to assess the relationship between laboratory response to ASA and metabolic control, insulin resistance and adipokines in DM2. Methods A total of 186 DM2 patients treated with oral antidiabetic drugs and receiving 75 mg ASA daily were included in the analysis. Response to ASA was assessed by measuring serum thromboxane B2 (TXB2) concentration and expressed as quartiles of TXB2 level. The achievement of treatment targets in terms of glycemic and lipid control, insulin resistance parameters (including Homeostatic Model Assessment-Insulin Resistance, HOMA-IR, index), and serum concentrations of high-molecular weight (HMW) adiponectin, leptin and resistin, were evaluated in all patients. Univariate and multivariate logistic regression analyses were performed to determine the predictive factors of serum TXB2 concentration above the upper quartile and above the median. Results Significant trends in age, body mass index (BMI), HOMA-IR, HMW adiponectin concentration, C-reactive protein concentration and the frequency of achieving target triglyceride levels were observed across increasing quartiles of TXB2. In a multivariate analysis, only younger age and higher BMI were independent predictors of TXB2 concentration above the upper quartile, while younger age and lower HMW adiponectin concentration were predictors of TXB2 concentration above the median. Conclusions These results suggest that in DM2, the most important predictor of HAPR is younger age. Younger DM2 patients may therefore require total daily ASA doses higher than 75 mg, preferably as a twice-daily regimen, to achieve full therapeutic effect. Higher BMI and lower HMW adiponectin concentration were also associated with less potent ASA effect. This is the first study to demonstrate an association of lower adiponectin concentration with higher serum TXB2 level in patients treated with ASA.
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Aalen OO, Røysland K, Gran JM, Kouyos R, Lange T. Can we believe the DAGs? A comment on the relationship between causal DAGs and mechanisms. Stat Methods Med Res 2014; 25:2294-2314. [PMID: 24463886 PMCID: PMC5051601 DOI: 10.1177/0962280213520436] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Directed acyclic graphs (DAGs) play a large role in the modern approach to causal inference. DAGs describe the relationship between measurements taken at various discrete times including the effect of interventions. The causal mechanisms, on the other hand, would naturally be assumed to be a continuous process operating over time in a cause–effect fashion. How does such immediate causation, that is causation occurring over very short time intervals, relate to DAGs constructed from discrete observations? We introduce a time-continuous model and simulate discrete observations in order to judge the relationship between the DAG and the immediate causal model. We find that there is no clear relationship; indeed the Bayesian network described by the DAG may not relate to the causal model. Typically, discrete observations of a process will obscure the conditional dependencies that are represented in the underlying mechanistic model of the process. It is therefore doubtful whether DAGs are always suited to describe causal relationships unless time is explicitly considered in the model. We relate the issues to mechanistic modeling by using the concept of local (in)dependence. An example using data from the Swiss HIV Cohort Study is presented.
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Affiliation(s)
- O O Aalen
- Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - K Røysland
- Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - J M Gran
- Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - R Kouyos
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - T Lange
- Department of Biostatistics, University of Copenhagen, Copenhagen K, Denmark
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Magri CJ, Fava S. Should diabetes still be considered a coronary artery disease equivalent? J Cardiovasc Med (Hagerstown) 2012; 13:760-5. [PMID: 22885535 DOI: 10.2459/jcm.0b013e3283577295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Diabetes is well established as a cardiovascular risk factor and is currently regarded as a coronary artery disease equivalent. However, some recent data have contradicted the concept. We review the currently available data and usefulness or otherwise of this concept. While the concept of coronary artery disease equivalence has served to highlight the importance of diabetes as a risk factor, it has a number of problems. We propose that it would be more useful to consider diabetes as a myocardial infarction risk equivalent. This is not only more precise and in line with the literature but also conveys better the message that patients with diabetes and one or more previous myocardial infarction(s) are at even higher risk.
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Affiliation(s)
- Caroline J Magri
- Department of Cardiology, Mater Dei Hospital, University of Malta, Malta
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