1
|
Ciechanowska A, Gora I, Sabalinska S, Foltynski P, Ladyzynski P. Effect of glucose concentration and culture substrate on HUVECs viability in in vitro cultures: A literature review and own results. Biocybern Biomed Eng 2021. [DOI: 10.1016/j.bbe.2021.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
2
|
Alvarado-Vasquez N. Could a family history of type 2 diabetes be a risk factor to the endothelial damage in the patient with COVID-19? Med Hypotheses 2020; 146:110378. [PMID: 33189452 PMCID: PMC7644429 DOI: 10.1016/j.mehy.2020.110378] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/19/2020] [Accepted: 11/02/2020] [Indexed: 01/08/2023]
Abstract
In December 2019, in China, a disease derived from a new beta coronavirus (SARS-CoV-2) was reported, which was termed coronavirus disease 2019 (COVID-19). Currently, it is known that endothelial cell dysfunction is a critical event in the infection by this virus. However, in a representative percentage of patients with COVID-19, neither cardiovascular disease nor diabetes mellitus, which could be linked with endothelial dysfunction, has been reported. Previous evidence has shown the presence of early endothelial dysfunction in healthy subjects but with a family history of type 2 diabetes (FH-DM2), where glucose metabolism, the synthesis of nitric oxide (NO), reactive oxygen species (ROS), as well as expression of genes involved with their synthesis are impaired. Besides, in subjects with an FH-DM2, the presence of hyperinsulinemia and high glucose levels are common events that could favor the infection of endothelial cells by the coronavirus. Interestingly, both events have been reported in patients with COVID-19, in whom hyperinsulinemia increases the surface expression of ACE2 through a diminution of ADAMTS17 activity; whereas hyperglycemia induces higher expression of ACE2 in different tissues, including microvascular endothelial cells from the pancreatic islets, favoring chronic hyperglycemia and affecting the release of insulin. Therefore, we hypothesized that an FH-DM2 should be considered an important risk factor, since the individuals with this background develop an early endothelial dysfunction, which would increase the susceptibility and severity of infection and damage to the endothelium, in the patient infected with the SARS-CoV-2.
Collapse
Affiliation(s)
- Noé Alvarado-Vasquez
- Department of Biochemistry, National Institute of Respiratory Diseases, Mexico City 14080, Mexico.
| |
Collapse
|
3
|
Alcázar-Leyva S, Zapata E, Bernal-Alcántara D, Gorocica P, Alvarado-Vásquez N. Thiamine pyrophosphate diminishes nitric oxide synthesis in endothelial cells. INT J VITAM NUTR RES 2020; 91:491-499. [PMID: 32228174 DOI: 10.1024/0300-9831/a000650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although thiamine pyrophosphate (TPP) is considered a protective agent for endothelial cells, it is still unknown if this is associated with nitric oxide (NO) synthesis. Our aim was to evaluate the synthesis of NO in endothelial cells incubated with TPP and high glucose concentrations. Endothelial cells from the umbilical cord vein from newborns (n = 20), were incubated with 5, 15 or 30 mmol/L glucose, in absence or presence of 0.625 mg/ml of TPP. Our results showed a significant increase in cell proliferation (> 40%; P < 0.05), and cell viability (> 90%; P < 0.001) after 48 h in endothelial cells cultured with glucose plus TPP. Likewise, in the presence of glucose and TPP an important rise in the consumption of glucose by the endothelial cells was observed after 24 h (> 7%; P < 0.001) and 48 h (> 10%; P < 0.05). Additionally, the levels of lactate after incubation with glucose and TPP showed only slight variations after 48 h (P < 0.05). However, these changes were clearly different from those observed in the absence of TPP. Interestingly, we found that the changes mentioned were linked with reduced levels of nitrites both at 24 h (< 171 pmol/μg protein; P < 0.001), and 48 h (< 250 pmol/μg protein; P < 0.05), which was associated with a reduced expression of mRNA of eNOS in endothelial cells incubated with TPP and high glucose. In conclusion, the presence of TPP regulates the consumption of glucose and the synthesis of NO, which would explain its protective effect in the endothelium of diabetic patients.
Collapse
Affiliation(s)
| | - Estrella Zapata
- Department of Embriology, Faculty of Medicine, BUAP, Puebla, Mexico
| | | | - Patricia Gorocica
- Department of Biochemistry, National Institute of Respiratory Diseases, Mexico
| | | |
Collapse
|
4
|
Romo-Yáñez J, Domínguez-Castro M, Flores-Reyes JS, Estrada-Juárez H, Mancilla-Herrera I, Hernández-Pineda J, Bazan-Tejeda ML, Aguinaga-Ríos M, Reyes-Muñoz E. Hyperglycemia differentially affects proliferation, apoptosis, and BNIP3 and p53 mRNA expression of human umbilical cord Wharton's jelly cells from non-diabetic and diabetic pregnancies. Biochem Biophys Res Commun 2018; 508:1149-1154. [PMID: 30554659 DOI: 10.1016/j.bbrc.2018.12.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 12/05/2018] [Indexed: 01/25/2023]
Abstract
Diabetes in pregnancy constitutes an unfavorable environment for embryonic and fetal development, where the child has a higher risk of perinatal morbidity and mortality, with high incidence of congenital malformations and predisposition to long-term metabolic diseases that increase with a hypercaloric diet. To analyze whether hyperglycemia differentially affects proliferation, apoptosis, and mRNA expression in cells from children of normoglycemic pregnancies (NGPs) and diabetes mellitus pregnancies (DMPs), we used umbilical cord Wharton jelly cells as a research model. Proliferation assays were performed to analyze growth and determine the doubling time, and the rate of apoptosis was determined by flow cytometry-annexin-V assays. AMPK, BNIP3, HIF1α, and p53 mRNA gene expression was assessed by semi-quantitative RT-PCR. We found that hyperglycemia decreased proliferation in a statistically significant manner in NGP cells treated with 40 mM D-glucose and in DMP cells treated with 30 and 40 mM D-glucose. Apoptosis increased in hyperglycemic conditions in NGP and DMP cells. mRNA expression of BNIP3 and p53 was significantly increased in cells from DMPs but not in cells from NGPs. We found evidence that maternal irregular metabolic conditions, like diabetes with hyperglycemia in culture, affect biological properties of fetal cells. These observations could be a constituent of fetal programming.
Collapse
Affiliation(s)
- José Romo-Yáñez
- Departamento de Genética y Genómica Humana, INPer, Mexico City, Mexico; Coordinación de Endocrinología Ginecológica y Perinatal, INPer, Mexico.
| | - Mauricio Domínguez-Castro
- Departamento de Genética y Genómica Humana, INPer, Mexico City, Mexico; Departamento de Fisiologia y Desarrollo Celular, INPer, Mexico
| | | | | | | | | | | | | | | |
Collapse
|
5
|
New Naphthalene Derivatives from the Bulbs of Eleutherine americana with Their Protective Effect on the Injury of HUVECs. Molecules 2018; 23:molecules23092111. [PMID: 30135380 PMCID: PMC6225190 DOI: 10.3390/molecules23092111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/14/2018] [Accepted: 08/19/2018] [Indexed: 12/11/2022] Open
Abstract
Five new naphthalene derivatives, named Eleutherols A–C (1–3) and Eleuthinones B–C (4,5), together with three known compounds were isolated from the bulbs of Eleutherine americana. Their structures were elucidated on the basis of spectroscopic analysis including HR-ESI-MS, 1D and 2D NMR techniques. These compounds exhibited a potent effect against the injury of human umbilical vein endothelial cell (HUVECs) induced by high concentrations of glucose in vitro.
Collapse
|
6
|
Muñoz-Vega M, Massó F, Páez A, Carreón-Torres E, Cabrera-Fuentes HA, Fragoso JM, Pérez-Hernández N, Martinez LO, Najib S, Vargas-Alarcón G, Pérez-Méndez Ó. Characterization of immortalized human dermal microvascular endothelial cells (HMEC-1) for the study of HDL functionality. Lipids Health Dis 2018; 17:44. [PMID: 29523150 PMCID: PMC5845210 DOI: 10.1186/s12944-018-0695-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 03/02/2018] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Primary cultures endothelial cells have been used as models of endothelial related diseases such atherosclerosis. Biological behavior of primary cultures is donor-dependent and data could not be easily reproducible; endothelial cell lines are emerging options, particularly, human dermal microvascular endothelial cells (HMEC-1), that should be validated to substitute primary cultures for the study of HDL functions. METHODS Morphology, size and granularity of cells were assessed by phase contrast microscopy and flow cytometry of HMEC-1. The adhesion molecules, ICAM-1and VCAM-1 after TNF-α stimulation, and endothelial markers CD105 endoglin, as well as HDL receptor SR-BI were determined by flow cytometry. Internalization of HDL protein was demonstrated by confocal microscopy using HDL labeled with Alexa Fluor 488. HUVECs were used as reference to compared the characteristics with HMEC-1. RESULTS HMEC-1 and HUVEC had similar morphologies, size and granularity. HMEC-1 expressed endothelial markers as HUVECs, as well as functional SR-B1 receptor since the cell line was able to internalize HDL particles. HMEC-1 effectively increased ICAM-1 and VCAM-1 expression after TNF-α stimulation. HUVECs showed more sensibility to TNF-α stimulus but the range of ICAM-1 and VCAM-1 expression was less homogeneous than in HMEC-1, probably due to biological variation of the former. Finally, the expression of adhesion molecules in HMEC-1 was attenuated by co-incubation with HDL. CONCLUSION HMEC-1 possess characteristics of endothelial cells, similar to HUVECs, being a cell line suitable to evaluate the functionality of HDL vis-à-vis the endothelium.
Collapse
Affiliation(s)
- Mónica Muñoz-Vega
- Molecular Biology Department, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, 14080, Mexico City, Mexico
| | - Felipe Massó
- Physiology Departments, Instituto Nacional de Cardiología "Ignacio Chávez", Mexico City, Mexico
| | - Araceli Páez
- Physiology Departments, Instituto Nacional de Cardiología "Ignacio Chávez", Mexico City, Mexico
| | - Elizabeth Carreón-Torres
- Molecular Biology Department, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, 14080, Mexico City, Mexico
| | - Hector A Cabrera-Fuentes
- Cardiovascular and Metabolic Disorders Program, Duke-NUS Graduate Medical School, Singapore, Singapore
- Institute of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany
- National Heart Centre Singapore, National Heart Research Institute Singapore, Singapore, Singapore
| | - José Manuel Fragoso
- Molecular Biology Department, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, 14080, Mexico City, Mexico
| | - Nonanzit Pérez-Hernández
- Molecular Biology Department, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, 14080, Mexico City, Mexico
| | - Laurent O Martinez
- Institute of Metabolic and Cardiovascular Diseases, I2MC, Inserm, UMR, 1048, Toulouse, France
| | - Souad Najib
- Institute of Metabolic and Cardiovascular Diseases, I2MC, Inserm, UMR, 1048, Toulouse, France
| | - Gilberto Vargas-Alarcón
- Molecular Biology Department, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, 14080, Mexico City, Mexico
| | - Óscar Pérez-Méndez
- Molecular Biology Department, Instituto Nacional de Cardiología "Ignacio Chávez", Juan Badiano 1, Sección XVI, 14080, Mexico City, Mexico.
| |
Collapse
|
7
|
Long HP, Zou H, Li FS, Li J, Luo P, Zou ZX, Hu CP, Xu KP, Tan GS. Involvenflavones A-F, six new flavonoids with 3'-aryl substituent from Selaginella involven. Fitoterapia 2015. [PMID: 26226107 DOI: 10.1016/j.fitote.2015.07.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Six new flavonoids, involvenflavones A-F (1-6), were isolated from Selaginella involven. Their structures were elucidated based on UV, IR, 1D and 2D NMR as well as HR-ESI-MS techniques. All compounds belong to apigenin derivatives with 3'-aryl substituent. This is the first report of the apigenin derivatives with 3'-aryl substituent from nature resources. These compounds also exhibited a potent effect against the injury of human umbilical vein endothelial cell (HUVECs) induced by high concentrations of glucose in vitro.
Collapse
Affiliation(s)
- Hong-Ping Long
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China
| | - Hui Zou
- The Medical College of Hunan Normal University, Changsha 410013, PR China
| | - Fu-Shuang Li
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China
| | - Jing Li
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China
| | - Ping Luo
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China
| | - Zhen-Xing Zou
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China
| | - Chang-Ping Hu
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China
| | - Kang-Ping Xu
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China.
| | - Gui-Shan Tan
- School of Pharmaceutical Sciences, Central South University, Changsha 410013, PR China; Xiangya Hospital of Central South University, Changsha 410008, PR China.
| |
Collapse
|
8
|
Alvarado-Vásquez N. Circulating cell-free mitochondrial DNA as the probable inducer of early endothelial dysfunction in the prediabetic patient. Exp Gerontol 2015; 69:70-8. [PMID: 26026597 DOI: 10.1016/j.exger.2015.05.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 05/09/2015] [Accepted: 05/25/2015] [Indexed: 12/16/2022]
Abstract
Recent evidence has shown that 346million people in the world have diabetes mellitus (DM); this number will increase to 439million by 2030. In addition, current data indicate an increase in DM cases in the population between 40 and 59years of age. Diabetes is associated with the development of micro- and macro-vascular complications, derived from chronic hyperglycemia on the endothelium. Some reports demonstrate that people in a prediabetic state have a major risk of developing early endothelial dysfunction (ED). Today, it is accepted that individuals considered as prediabetic patients are in a pro-inflammatory state associated with endothelial and mitochondrial dysfunction. It is important to mention that impaired mitochondrial functionality has been linked to endothelial apoptosis and release of mitochondrial DNA (mtDNA) in patients with sepsis, cardiac disease, or atherosclerosis. This free mtDNA could promote ED, as well as other side effects on the vascular system through the activation of the toll-like receptor 9 (TLR9). TLR9 is expressed in different cell types (e.g., T or B lymphocytes, mastocytes, and epithelial and endothelial cells). It is localized intracellularly and recognizes non-methylated dinucleotides of viral, bacterial, and mitochondrial DNA. Recently, it has been reported that TLR9 is associated with the pathogenesis of lupus erythematosus, rheumatoid arthritis, and autoimmune diabetes. In this work, it is hypothesized that the increase in the levels of circulating mtDNA is the trigger of early ED in the prediabetic patient, and later on in the older patient with diabetes, through activation of the TLR9 present in the endothelium.
Collapse
Affiliation(s)
- Noé Alvarado-Vásquez
- Department of Biochemistry, National Institute of Respiratory Diseases "Ismael Cosío Villegas", Calz. de Tlalpan 4502, Col. Sección XVI, 14080 Mexico, D.F., Mexico, Mexico.
| |
Collapse
|
9
|
Increase in nitric oxide levels and mitochondrial membrane potential in platelets of untreated patients with major depression. Psychiatry Res 2013; 209:447-52. [PMID: 23357685 DOI: 10.1016/j.psychres.2012.12.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 09/26/2012] [Accepted: 12/22/2012] [Indexed: 11/20/2022]
Abstract
Alterations in platelet activity have been associated with the onset of major depressive disorder (MDD) and with ischemic cardiovascular events through mechanisms that remain unknown. The present study evaluated nitric oxide (NO) levels, mitochondrial membrane potential (PMMP), and P-selectin expression in platelets from 30 untreated MDD patients and 30 matched controls by flow cytometry. In addition, tryptophan and serotonin concentrations were measured in the whole blood by high performance liquid chromatography. Patients were assessed with the Mini International Neuropsychiatric Interview and the Hamilton Depression Rating Scale. The patients had not had antidepressant treatment or any other pharmacological interventions for at least 1 year. MDD patients significantly differed from controls in levels of major fluorescent platelets for NO, PMMP, and P-selectin compared with those observed in control subjects. Serotonin concentrations in MDD patients did not differ from those in controls These results demonstrate that untreated MDD patients show increased platelet activation, suggesting an alteration in the platelet function.
Collapse
|
10
|
Zou ZX, Xu KP, Li FS, Zou H, Liu MZ, Zhang Q, Yu K, Zhao LF, Tan LH, Tan GS. A new pyrrole alkaloid from Selaginella moellendorfii Hieron. CHINESE CHEM LETT 2013. [DOI: 10.1016/j.cclet.2013.01.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
11
|
González-Trujano ME, Alvarado-Vásquez N, Mendoza-Sotelo J, López G, Estrada-Camarena E, Martínez-Mota L, Moreno J. Alterations on the morphology, nitric oxide synthesis and activity of platelets reproduced in rats as possible biomarkers for depression are reversed by fluoxetine. Pharmacol Biochem Behav 2012; 102:349-56. [DOI: 10.1016/j.pbb.2012.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 03/07/2012] [Accepted: 03/17/2012] [Indexed: 10/28/2022]
|
12
|
Alcázar-Leyva S, Alvarado-Vásquez N. Could thiamine pyrophosphate be a regulator of the nitric oxide synthesis in the endothelial cell of diabetic patients? Med Hypotheses 2011; 76:629-31. [PMID: 21288652 DOI: 10.1016/j.mehy.2011.01.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Accepted: 01/09/2011] [Indexed: 12/12/2022]
Abstract
Thiamine (Vitamin B1) is considered an essential micronutrient for humans; its deficient intake brings about the Wernicke-Korsakoff syndrome (encephalopathy and psychosis) or beriberi (a neurological and cardiovascular disease). Once thiamine enters the cells it is phosphorylated by thiamine pyrophosphokinase (TPPK), and converted into the coenzyme thiamine pyrophosphate (TPP), the active form of thiamine. TPP is a relevant cofactor for transketolase (TK), α-ketoglutarate dehydrogenase (αKDH), and pyruvate dehydrogenase (PDH), all these enzymes are fundamental for glucose metabolism. Diabetes mellitus (DM), however, is considered both a deficient thiamine and deficient energy state, as a consequence of the limited TPP synthesis. Recent evidences have shown that the administration of thiamine or lipid-soluble derivatives, such as benfotiamine (developed to improve the bioavailability of thiamine), has positive effects in the diabetic patient (after thiamine is transformed into TPP). For this reason, administration of supplements with TPP in the diabetic patients is recommended to avoid complications, like neuropathy and nephropathy. It has been suggested that these beneficial effects are a consequence of the activation of TK (pentose pathway) or the PDH complex in mitochondria. Nitric oxide (NO) is synthesized by the endothelial cell and is also an important element for the viability and functionality of this cell type. However, in the DM patient, a deficient synthesis of NO has been reported. It is relevant to mention that recent evidences have led to propose mitochondrial activity as an important regulator of nitric oxide synthesis (ON). We consider that the exogenous administration of TPP facilitates the utilization of this molecule, regulating some metabolic processes such as phosphorylation of thiamine by TPPK, energy consumption (ATP), as well as mitochondrial activity, inducing eventually NO synthesis. If this is confirmed, the administration of TPP to the diabetic patient would provide additional protection to endothelial cells, reducing the risk of vascular damage, to which the diabetic patient is highly susceptible.
Collapse
|
13
|
Relevance of disease- and organ-specific endothelial cells forin vitroresearch. Cell Biol Int 2010; 34:1231-8. [DOI: 10.1042/cbi20100531] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
14
|
Inhibition of mitochondrial function reduces DNA repair in human mononuclear cells. Leuk Res 2010; 35:219-25. [PMID: 20619454 DOI: 10.1016/j.leukres.2010.06.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 05/30/2010] [Accepted: 06/10/2010] [Indexed: 11/20/2022]
Abstract
BACKGROUND Mitochondria provide ATP and Ca(2+) needed for DNA repair, but also produce reactive oxygen species (ROS), which may damage DNA. AIM To investigate the effect of mitochondrial function inhibition on DNA repair. METHOD Five mitochondrial inhibitors acting at various sites of electron transport were studied. Human peripheral blood mononuclear cells, spontaneous and H(2)O(2)-induced DNA repair, as well as %-double-stranded-DNA, were measured. RESULTS All mitochondrial inhibitors suppressed spontaneous and H(2)O(2)-induced DNA repair. However, their effect on %-double-stranded-DNA differed, which is partly related to ROS suppression. CONCLUSION Mitochondrial inhibition may enhance efficacy and reduce toxicity of radiation and cytotoxic drugs therapy.
Collapse
|
15
|
HUVECs from newborns with a strong family history of diabetes show increased apoptosis by flow cytometry with annexin V. Diabetes Metab Syndr 2010. [DOI: 10.1016/j.dsx.2010.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
16
|
Alvarado-Vásquez N, Zapata E, Alcázar-Leyva S, Massó F, Montaño LF. Reduced NO synthesis and eNOS mRNA expression in endothelial cells from newborns with a strong family history of type 2 diabetes. Diabetes Metab Res Rev 2007; 23:559-66. [PMID: 17385193 DOI: 10.1002/dmrr.743] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND A deficient synthesis of nitric oxide (NO) may play a role in the early endothelial dysfunction of healthy humans with a strong family history of type 2 diabetes (DM2). In this study, we evaluate the intracellular synthesis of NO and the expression of eNOS transcripts in human umbilical vein endothelial cells (HUVECs), exposed to high glucose concentrations, of healthy newborns with (experimental) and without (control) a strong family history of DM2. METHODS HUVECs were incubated in M-199 culture media (containing a 5 mmol/L physiological glucose concentration) or supraphysiological glucose concentrations (15 or 30 mmol/L), for 48 h. Flow cytometry, reactive of Griess and RT-PCR were used to determine intracellular NO synthesis, presence of NO metabolites, and expression of eNOS, GLUT1 or p53 transcripts. RESULTS NO synthesis in experimental HUVECs showed a progressive reduction in the presence of increasing glucose concentration (11% for 5 mmol to 8% for 30 mmol; p < 0.01), whereas control HUVECs showed an increase in NO synthesis (3% for 5 mmol to 31% for 30 mmol; p < 0.001). In experimental HUVECs, we found a diminished expression of eNOS and p53, and also an enhanced expression of GLUT1 mRNA transcripts. Control HUVECs showed an increase in eNOS, and no modifications in p53 or GLUT1 mRNA transcripts. CONCLUSIONS Our results show how HUVECs, isolated from healthy newborns with a strong family history of DM2, have an abnormal intracellular synthesis of NO and an impaired expression of eNOS, GLUT1 and p53 genes, all associated with NO synthesis.
Collapse
Affiliation(s)
- Noé Alvarado-Vásquez
- Departamento de Bioquímica, Instituto Nacional de Enfermedades Respiratorias, México.
| | | | | | | | | |
Collapse
|