18 research outputs found
Markers of inflammation and cardiovascular disease in recently diagnosed celiac disease patients
AIM: To evaluate novel risk factors and biomarkers of cardiovascular disease in celiac disease (CD) patients compared with healthy controls.METHODS:Twenty adult patients with recent diagnosis of CD and 20 sex, age and body mass index-matched healthy controls were recruited during a period of 12 mo.Indicators of carbohydrate metabolism, hematological parameters and high sensitive C reactive protein were determined. Moreover, lipoprotein metabolism was also explored through evaluation of the lipid profile and the activity of cholesteryl ester transfer protein and lipoprotein associated phospholipase A2, which is also considered a specific marker of vascular inflammation. The protocol was approved by the Ethic Committee from School of Pharmacy and Biochemistry, University of Buenos Aires and from Buenos Aires Italian Hospital, Buenos Aires, Argentina.RESULTS: Regarding the indicators of insulin resistance, CD patients showed higher plasma insulin levels [7.2 (5.0-11.3) mU/L vs 4.6 (2.6-6.7) mU/L, P < 0.05], increased Homeostasis Model Assessment-Insulin Resistance [1.45 (1.04-2.24) vs 1.00 (0.51-1.45), P < 0.05] and lower Quantitative Sensitive Check index [0.33 (0.28-0.40) vs 0.42 (0.34-0.65), P < 0.05] indexes. Folic acid concentration [5.4 (4.4-7.9) ng/mL vs 12.2 (8.0-14.2) ng/mL, P < 0.01] resulted to be lower and High-sensitivity C reactive protein levels higher (4.21 ± 6.47 mg/L vs 0.98 ± 1.13 mg/L, P < 0.01) in the patient group. With respect to the lipoprotein profile, CD patients showed lower high density lipoproteincholesterol (HDL-C) (45 ± 15 mg/dL vs 57 ± 17 mg/dL, P < 0.05) and apo A-I (130 ± 31 mg/dL vs 155 ± 29 mg/ dL, P < 0.05) levels, as well as higher total cholesterol/ HDL-C [4.19 (3.11-5.00) vs 3.52 (2.84-4.08), P < 0.05] and apo B/apo A-I (0.75 ± 0.25 vs 0.55 ± 0.16, P < 0.05) ratios in comparison with control subjects. No statistically significant differences were detectedin lipoprotein-associated lipid transfer protein and enzymes.CONCLUSION: The presence and interaction of the detected alterations in patients with CD, would constitute a risk factor for the development of atherosclerotic cardiovascular disease.Fil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Meroño, Tomás. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Menafra, MartĂn. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Martin, Maximiliano. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Botta, Eliana Elizabeth. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Matoso, MarĂa Dolores. Hospital Italiano; ArgentinaFil: Sorroche, Patricia Beatriz. Hospital Italiano; ArgentinaFil: De Paula, Juan A. Hospital Italiano; ArgentinaFil: Boero, Laura Estela. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Brites, Fernando Daniel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentin
Lp-PLA2 Activity During Iron Depletion Treatment in Primary IO Patients
Background: Lipoprotein-associated phospholipase A2 (Lp-PLA2) is an inflammatory biomarker involved in atherosclerosis and cardiovascular disease (CVD). Iron stores may modify Lp-PLA2 as higher activity levels wereobserved in patients with primary iron overload (IO).Aim: to evaluate the changes of Lp-PLA2 activity and other atherosclerosis markers in patients with primary IO after iron depletion.Materials and Methods:The study initially included 20 male patients with primary IO, defined by liver histology,from which 7 were lost during follow-up and 13 completed the study (mean follow-up duration: 24±6 months).Phlebotomy treatment consisted in the removal of 1 unit of blood weekly or biweekly. We recorded traditional cardiovascular risk factors, high sensitivity C-reactive protein (hsCRP), and Lp-PLA2 activity. Longitudinal differences were tested by paired T or Wilcoxon tests. Linear regression was used to evaluate the relationship between changes in ferritin and in Lp-PLA2.Results: HFE mutations were present in 77% of the patients. Besides ferritin concentration (-74%), ALT (-11%) and Lp-PLA2 activities (-14%) were reduced after iron depletion (all p<0.05). Linear regression showed that changes in ferritin levels explained a 60% of the variability in the changes of Lp-PLA2 activity (B=0.80, p=0.008, R2 = 0.60).Conclusions: Treatment by phlebotomy significantly reduced the levels of Lp-PLA2 activity besides its expected effects in liver markers. The implications of iron depletion for the reduction of CVD risk remain to be studied.Fil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: MartĂn, Maximiliano Emmanuel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Botta, Eliana Elizabeth. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Saez, MarĂa Soledad. Hospital Italiano; ArgentinaFil: Ferraro, Maria Florencia. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Boero, Laura Estela. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Sorroche, Patricia B. Hospital Italiano; ArgentinaFil: Arbelbide, Jorge. Hospital Italiano; ArgentinaFil: Brites, Fernando Daniel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Meroño, Tomás. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentin
Lp-PLA2 Activity During Iron Depletion Treatment in Primary IO Patients
Background: Lipoprotein-associated phospholipase A2 (Lp-PLA2) is an inflammatory biomarker involved in atherosclerosis and cardiovascular disease (CVD). Iron stores may modify Lp-PLA2 as higher activity levels wereobserved in patients with primary iron overload (IO).Aim: to evaluate the changes of Lp-PLA2 activity and other atherosclerosis markers in patients with primary IO after iron depletion.Materials and Methods:The study initially included 20 male patients with primary IO, defined by liver histology,from which 7 were lost during follow-up and 13 completed the study (mean follow-up duration: 24±6 months).Phlebotomy treatment consisted in the removal of 1 unit of blood weekly or biweekly. We recorded traditional cardiovascular risk factors, high sensitivity C-reactive protein (hsCRP), and Lp-PLA2 activity. Longitudinal differences were tested by paired T or Wilcoxon tests. Linear regression was used to evaluate the relationship between changes in ferritin and in Lp-PLA2.Results: HFE mutations were present in 77% of the patients. Besides ferritin concentration (-74%), ALT (-11%) and Lp-PLA2 activities (-14%) were reduced after iron depletion (all p<0.05). Linear regression showed that changes in ferritin levels explained a 60% of the variability in the changes of Lp-PLA2 activity (B=0.80, p=0.008, R2 = 0.60).Conclusions: Treatment by phlebotomy significantly reduced the levels of Lp-PLA2 activity besides its expected effects in liver markers. The implications of iron depletion for the reduction of CVD risk remain to be studied.Fil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: MartĂn, Maximiliano Emmanuel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Botta, Eliana Elizabeth. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Saez, MarĂa Soledad. Hospital Italiano; ArgentinaFil: Ferraro, Maria Florencia. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Boero, Laura Estela. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Sorroche, Patricia B. Hospital Italiano; ArgentinaFil: Arbelbide, Jorge. Hospital Italiano; ArgentinaFil: Brites, Fernando Daniel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Meroño, Tomás. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentin
Conditioning Factors for High Cardiovascular Risk in Patients with Cushing's Syndrome
Objective: To characterize the alterations in carbohydrate and lipoprotein metabolism, to evaluate markers of lipoprotein functionality, and to identify the presence of novel atherogenic risk factors in patients with Cushing syndrome (CS) in comparison with sex- and age-matched controls.
Methods: In an open, cross-sectional study, 32 nontreated patients with active CS were consecutively recruited from the Endocrinology Service at “JosĂ© de San MartĂn” Clinical Hospital, University of Buenos Aires, Argentina, between April 11, 2010 and December 11, 2012. The patients were compared with sex- and age-matched controls.
Results: Versus controls, patients with CS presented with excess weight, central obesity, and hypercortisolism. They also exhibited an insulin-resistant state, with high resistin levels (median [interquartile range], 16 [10 to 22] ng/mL versus 6 [5 to 9] ng/mL; P<.0001), a more atherogenic lipoprotein profile, high oxidized low-density lipoprotein levels (oxLDL; mean ± SD, 100 ± 31 U/L versus 75 ± 32 U/L; P<.05) and high sensitive C-reactive protein levels (median [interquartile range], 1.2 [0.6 to 3.1] mg/L versus 0.6 [0.3 to 1.1] mg/L; P<.05), and increased leukocyte count (mean ± SD, 9.5 ± 2.6 × 103 cells/μL versus 6.5 ± 1.4 × 103 cells/μL; P<.0001). Multivariate analyses showed that the increase in waist circumference was associated with both the diagnosis of CS and the degree of insulin resistance. Resistin concentration was related to a greater extent to the diagnosis of CS than to homeostasis model assessment–insulin resistance. Triglyceride and oxLDL levels were only significantly associated with the diagnosis of CS.
Conclusion: Hypercortisolism is related to the increase observed in triglycerides and oxLDL levels, and, in combination with insulin resistance, acts to increase waist circumference and amplify the inflammatory process, key factors for the development of cardiovascular disease.Fil: Boero, Laura. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Manavela, Marcos. Universidad de Buenos Aires. Facultad de Medicina. Hospital de ClĂnicas General San MartĂn; ArgentinaFil: Botta, Eliana Elizabeth. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Mallea Gil, Maria Susana. Ministerio de Defensa. EjĂ©rcito Argentino. Hospital Militar Central Cirujano Mayor ; ArgentinaFil: Katz, DĂ©bora. FundaciĂłn para la Lucha contra las Enfermedades NeurolĂłgicas de la Infancia; ArgentinaFil: Meroño, Tomás. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Martin, Maximiliano Emanuel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Gomez Rosso, Leonardo Adrián. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Danilowicz, Karina. Universidad de Buenos Aires. Facultad de Medicina. Hospital de ClĂnicas General San MartĂn; ArgentinaFil: Brites, Fernando Daniel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentin
Leukocyte telomere length is associated with iron overload in male adults with hereditary hemochromatosis
Background: Hereditary hemochromatosis (HH) is a primary iron overload (IO) condition. Absolute telomere length (ATL) is a marker of cellular aging and DNA damage associated with chronic diseases and mortality. Aim: To evaluate the relationship between ATL and IO in patients with HH. Methods: Cross-sectional study including 25 patients with HH: 8 with IO and 17 without IO (ferritin 18 years, male sex and HH diagnosis. Patients with diabetes or other endocrine and autoimmune diseases were excluded. ATL was measured by real-time PCR. Results: HH patients with IO were older (P<0.001) and showed higher ferritin concentration (P<0.001). Patients with HH, disregarding the iron status, showed higher glucose and body mass index (BMI) than controls (both P<0.01). ATL was shorter in patients with IO than controls [with IO: 8 (6-14), without IO: 13 (9-20), and controls: 19 (15-25) kilobase pairs, P<0.01]; with a linear trend within groups (P for trend <0.01). Differences in ATL remained statistically significant after adjusting by age, BMI and glucose (P<0.05). Discussion: Patients with IO featured shorter ATL while patients without IO showed only mild alterations vs. controls. Screening for IO is encouraged to prevent iron-associated cellular damage and early telomere attrition.Fil: MartĂn, Maximilino. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Millán, Andrea Liliana. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay. Instituto de InmunologĂa, GenĂ©tica y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de InmunologĂa, GenĂ©tica y Metabolismo; ArgentinaFil: Ferraro, Florencia. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Botta, Eliana Elizabeth. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Castro, Marcelo. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Hospital de ClĂnicas General San MartĂn; ArgentinaFil: Boero, Laura. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Rey, Jorge. Universidad de Buenos Aires. Facultad de Medicina. Hospital de ClĂnicas General San MartĂn; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Daruich, Jorge. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Hospital de ClĂnicas General San MartĂn; ArgentinaFil: Frechtel, Gustavo Daniel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay. Instituto de InmunologĂa, GenĂ©tica y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de InmunologĂa, GenĂ©tica y Metabolismo; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Merono, Tomas. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Cerrone, Gloria Edith. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay. Instituto de InmunologĂa, GenĂ©tica y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de InmunologĂa, GenĂ©tica y Metabolismo; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Brites, Fernando Daniel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentin
Actividades de CETP y Lp-PLA2 en niños y adolescentes clasificados en base al indicador de resistencia insulĂnica TG/C-HDL
IntroducciĂłn: la obesidad infantil y sus complicaciones asociadas, como la resistencia insulĂnica (RI), se encuentran en aumento. Un Ăndice de triglicĂ©ridos (TG) sobre colesterol de lipoproteĂnas de alta densidad (C-HDL) ≥3,0 ha sido propuesto como marcador de RI. La RI se asocia a alteraciones en enzimas y proteĂnas asociadas a lipoproteĂnas como la proteĂna transportadora de colesterol esterificado (CETP), la fosfolipasa A2 asociada a lipoproteĂnas (Lp-PLA2) y la paraoxonasa 1 (PON1). Objetivo: explorar la asociaciĂłn entre el Ăndice TG/C-HDL y la actividad de estas enzimas. Materiales y mĂ©todos: se reclutaron niños y adolescentes de 7 a 14 años de edad en Balcarce. Se cuantificaron peso, altura, IMC, glucosa, TG, colesterol total (CT), colesterol de lipoproteĂnas de baja densidad (C-LDL), C-HDL y las actividades de CETP, Lp-PLA2 y PON 1. Resultados: CETP correlacionĂł con TG (r=0,53; p<0,01), CT (r=0,38; p<0,01), C-HDL (r=-0,45; p<0,01), C-LDL (r=0,59; p<0,01), TG/C-HDL (r= 0,60; p < 0,01), y Lp-PLA2 (r = 0,26; p < 0,05). Lp-PLA2 correlacionĂł con TG (r=0,15; p<0,05), CT (r= 0,52; p<0,01), C-LDL (r=0,53; p<0,01) y TG/C-HDL (r=0,16; p<0,05). El análisis de regresiĂłn lineal mĂşltiplemostrĂł al Ăndice TG/C-HDL como un predictor de CETP (r2=0,29; beta=0,49; p<0,01) y Lp-PLA2 (r2=0,21; beta=0,32; p<0,05). Veinticinco niños y adolescentes presentaron un Ăndice TG/C-HDL≥3,0 y mayores valores de TG [164 (126-186) vs. 65 (48-72)mg/dl; p<0,01], CETP [250 (232-263) vs. 223 (193-237)%/ml.min; p<0,01] y Lp-PLA2 (4,5±1.9 vs. 3,5±1,3; p<0,05) junto con menor concentraciĂłn de C-HDL [41 (37-49) vs. 52 (48-62)mg/dl; p<0,01] comparados con niños y adolescentes con TG/C-HDL<3,0 pareados por edad.ConclusiĂłn: los niños y adolescentes con TG/C-HDL≥3,0 presentaron un perfil más aterogĂ©nico y mayores actividades de CETP y Lp-PLA2.Introduction: in the last decades, a worldwide increase in childhood obesity and its associated complications, like insulin resistance, has been observed. Triglyceride (TG) above high density lipoprotein cholesterol (HDL-C) index ≥3.0 has been proposed as an accessible marker of insulin resistance (IR). IR is associated with many alterations of lipoprotein-associated enzymes such as cholesteryl ester transfer protein (CETP), lipoprotein-associated phospholipase A2 (Lp-PLA2) and paraoxonase 1 (PON1). Objective: to explore the association between TG/C-HDL index and the activity of these enzymes. Children and adolescents (7-14 years old) were recruited from the city of Balcarce, Buenos Aires, Argentina. Weight, height, body mass index (BMI), glucose, TG, total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), HDL-C plus CETP, Lp-PLA2 and PON 1 activities were determined. CETP correlated with TG (r=0,53; p<0,01), TC (r=0,38; p<0,01), HDL-C (r=- 0,45; p<0,01), LDL-C (r=0,59; p<0,01), TG/HDL-C (r=0,60; p<0,01), and Lp-PLA2 activity (r=0,26; p<0,05). Lp-PLA2 correlated with TG (r=0,15; p<0,05), TC (r=0,52; p<0,01), LDL-C (r=0,53; p<0,01), and TG/HDL-C (r=0,16; p<0,05). Multiple lineal regression analyses showed TG/HDL-C index as an independent predictor of CETP (r2=0,29; beta=0,49; p<0,01) and Lp-PLA2 (r2=0,21; beta=0,32; p<0,05) activities. Twenty five children and adolescents presented TG/HDL-C≥3,0. These children and adolescents exhibited higher TG levels [164 (126-186) vs. 65 (48-72) mg/dl; p<0,01] and increased CETP [250 (232-263) vs. 223 (193-237)%/ml.min; p<0,01] and Lp-PLA2 (4,5±1.9 vs. 3,5±1,3; p<0,05) activities together with lower HDL-C [41 (37-49) vs. 52 (48-62) mg/dl; p<0,01] concentration compared to age-matched children and adolescents who presented TG/HDL-C<3,0. Children and adolescents with TG/HDL-C≥3,0 presented a more atherogenic lipid profile and higher CETP and Lp-PLA2 activities, which would be indicative of lipoprotein metabolism alterations.Fil: Martin, Maximiliano Emanuel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Verona, Julián. Hospital Municipal de Balcarce "Dr. Felipe A. Fossatti"; ArgentinaFil: Gilligan, Lisandro. Hospital Municipal de Balcarce "Dr. Felipe A. Fossatti"; ArgentinaFil: Verona, MarĂa Florencia. Hospital Municipal de Balcarce "Dr. Felipe A. Fossatti"; ArgentinaFil: Botta, Eliana Elizabeth. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Meroño, Tomás. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Boero, Laura. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Brites, Fernando Daniel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentin
Estudio del polimorfismo del promotor del gen de la IL-6 en pacientes con sobrecarga de hierro primaria
La sobrecarga de hierro (SH) primaria ha sido vinculada a un estado proinflamatorio y a mayor riesgo de enfermedad cardiovascular (ECV). Entre los marcadores de inflamaciĂłn asociados a ECV, se destacan la proteĂna C reactiva ultrasensible (PCRus) y la interleuquina 6 (IL-6). Existe una variante polimĂłrfica de nucleĂłtido simple (SNP) en la posiciĂłn -174 (G/C) del promotor del gen de la IL-6, que regula su transcripciĂłn. El objetivo de este trabajo fue valuar el SNP -174 G/C y su interacciĂłn con marcadores de inflamaciĂłn, con factores de riesgo y biomarcadores de ECV en pacientes con SH primaria y controles. Se estudiaron 37 pacientes de sexo masculino con SH primaria en comparaciĂłn con controles pareados por sexo y edad. Se determinĂł la concentraciĂłn de PCRus por inmunoturbidimetrĂa ultrasensible automatizada y la de IL-6 por enzimoinmunoensayo. Se evaluĂł el SNP-174 G/C por PCR-RFLP. Se encontrarĂł que la PCRus fue mayor y la IL-6 menor en los pacientes en comparaciĂłn con los controles. El análisis del polimorfismo del SNP-174 G/C mostrĂł frecuencias genotĂpicas significativamente diferentes entre pacientes (43% CC, 43% CG y 14% GG) y controles (10% CC, 41% CG y 49% GG) (OR = 4,09, IC 95% = 2,06 - 8,13, p < 0,0001), en los que se encontrĂł equilibrio de Hardy-Weinberg. El análisis de regresiĂłn logĂstica mĂşltiple revelĂł, que la SH se asociaba en forma independiente y significativa, a la homocigosis CC (OR: 7,05; p < 0,01; IC 95%: 1,66 – 29,86) y luego, a la ferremia. Se concluyĂł que los pacientes con SH primaria presentaron mayor frecuencia del alelo C en el promotor del gen de la IL-6, lo que condicionaba la presencia de menores niveles de IL-6. A travĂ©s de su relaciĂłn con la expresiĂłn de hepcidina, la disminuciĂłn de IL-6 acentuarĂa las alteraciones del metabolismo del hierro en los pacientes con SH, los cuales presentaron un estado proinflamatorio caracterizado por aumento de PCRus.Primary iron overload (IO) has been linked to a pro-inflammatory state and to increased risk of cardiovascular disease (CVD). Among the markers of inflammation associated with CVD, high sensitive C-reactive protein (hsCRP) and interleukin 6 (IL-6) are the most relevant. The gene promoter of IL-6 has a single nucleotide polymorphism (SNP) on position -174 (G/C), which regulates its transcription. The aim of this study was to o evaluate the SNP -174 G/C and its interaction with risk factors and biomarkers of CVD in patients with primary IO and controls. Thirty-seven men diagnosed with primary IO were studied and compared with sex and age-matched controls. HsCRP concentration was evaluated by automated high sensitive immunoturbidimetric assay and IL-6 by enzyme immunoassay. SNP -174 G/C was evaluated by PCR-RFLP. HsCRP was higher and IL-6 lower in patients compared to controls. The genotyping of the SNP -174 G/C showed significantly different genotype frequencies between patients (43% CC, 43% CG and 14% GG) and controls (10% CC, 41% CG and 49% GG) (OR = 4.09, 95% CI = 2.06 to 8.13, p < 0.0001), being in Hardy-Weinberg equilibrium. The multiple logistic regression analysis showed that IO was independently and significantly associated, firstly, with the CC homozygosis (OR: 7.05, p < 0.01; IC 95%: 1.66 – 29.86) and then with serum iron. It was concluded that patients patients with primary IO presented higher frequency of the C allele in IL-6 gene promoter, thereby conditioning the presence of lower circulating IL-6. Through its relationship with the expression of hepcidin, decreased IL-6 would deepen the alterations of iron metabolism in patients with IO, who presented a pro-inflammatory state characterized by increased hsCRP levels.Fil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Meroño, Tomás. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Sorroche, Patricia Beatriz. Hospital Italiano; ArgentinaFil: Boero, Laura Estela. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; ArgentinaFil: Martin, Maximiliano Emanuel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Botta, Eliana Elizabeth. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; ArgentinaFil: Castro, Marcelo. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; ArgentinaFil: Frechtel, Gustavo Daniel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay. Instituto de InmunologĂa, GenĂ©tica y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de InmunologĂa, GenĂ©tica y Metabolismo; ArgentinaFil: Rey, Jorge Alberto. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; ArgentinaFil: Daruich, Jorge. Universidad de Buenos Aires. Facultad de Medicina. Hospital de ClĂnicas General San MartĂn; ArgentinaFil: Cerrone, Gloria Edith. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay. Instituto de InmunologĂa, GenĂ©tica y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de InmunologĂa, GenĂ©tica y Metabolismo; ArgentinaFil: Brites, Fernando Daniel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Instituto de FisiopatologĂa y BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentin
Association between Apo B Levels in Mothers and in their Pre-school Age Offspring
Objective: The study aims to determine the association between apo B levels in mothers and their pre-school offspring. Methods: Anthropometric measurement (e.g. BMI), lipids, lipoproteins, and apolipoproteins (e.g. apo B) levels in mothers and their children were obtained in November 2015 in Buenos Aires. Results: Eighty-four children (42M) aged 5.3±1.6 years and their mothers aged 33.8±7.2 years were examined. The prevalence of overweight was 39.2 % (33) in mothers and 22.6 % (19) in children, and the prevalence of obesity was 38.1% (32) in mothers and 10.7% (9) in children. Multiple linear regression analysis showed that maternal apo B levels were associated with apo B levels in their offspring, adjusted for confounding variables (Beta=0.29; p=0.03; R2=0.25). Furthermore, offspring born to mothers with high apo B levels were six times likelier to have high apo B levels (OR), 5.7; (95% CI 1.3-25.5). Conclusion: This study suggests that maternal apo B levels were significantly associated with apo B concentration in their pre-school age children.Fil: Hirschler, Valeria. Universidad de Buenos Aires; ArgentinaFil: Martin, Maximiliano Emanuel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Oestreicher, Karen. Universidad de Buenos Aires; ArgentinaFil: Molinari, Claudia Patricia. Universidad de Buenos Aires; ArgentinaFil: Boero, Laura Estela. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Brites, Fernando Daniel. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentin
High density lipoprotein as a therapeutic target: Focus on its functionality
Cardiovascular diseases (CVDs) are the leading cause of death globally. CVDs are a group of disorders of the heart and blood vessels and include coronary heart disease, cerebrovascular disease and rheumatic heart disease among other conditions. There are multiple independent risk factors for CVD, including hypertension, age, smoking, insulin resistance, elevated low-density lipoprotein cholesterol (LDL-C) levels, and triglyceride levels. LDL-C levels have traditionally been the target for therapies aimed at reducing CVD risk. High density lipoprotein (HDL) constitutes the only lipoprotein fraction with atheroprotective functions. Early HDL-targeted therapies have focused on increasing HDL-C levels. However, clinical trials have shown that raising HDL-C with niacin failed to achieve CVD reduction. A possible explanation for these findings is that these drugs could interfere with lipid metabolism and cause alterations in HDL structure and composition, leading to loss of functionality. As a result, targeting HDL-C levels would be insufficient to achieve CVD risk reduction, making HDL functionality a more desirable focus for HDL-directed therapies. There are several drugs which show the potential to improve HDL functionality. These drugs include molecules already approved for human use, such as statins and niacin, and particularly, compounds currently undergoing development such as apolipoprotein A-I mimetics and reconstituted HDL preparations. These therapies show promising potential to improve HDL functionality specifically. Future therapeutic strategies should incorporate HDL functionality as a main target of interest.Fil: Rosso, Leonardo GĂłmez. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Davico, Belen. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Lozano Chiappe, Ezequiel Silvano. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Tetzlaff, Walter Francisco. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Boero, Laura. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Brites, Fernando Daniel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; ArgentinaFil: Martin, Maximiliano Emanuel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica. Departamento de BioquĂmica ClĂnica; Argentin
Increased Cholesteryl Ester Transfer Protein and Lipoprotein-Associated Phospholipase A2 Activities in Children and Adolescents Presenting High Triglyceride/High-Density Lipoprotein Cholesterol (TG/HDL-C) Ratio
Objective: To explore the association between Triglyceride/High-density lipoprotein cholesterol (TG/HDL-C) index and these enzymes and proteins in a pediatric population. Methods: Children and adolescents (7–14 y old) were recruited (n = 150) and anthropometric data were registered. Glucose, TG, total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), HDL-C plus cholesteryl ester transfer protein (CETP), lipoprotein-associated phospholipase A2 (Lp-PLA2) and paraoxonase 1 (PON1) activities were determined. Results: Twenty-five individuals presented TG/HDL-C ratio ≥ 3.0. These individuals exhibited higher TG [164 (126–186) vs. 65 (48–72) mg/dL; p < 0.01] CETP [250 (232–263) vs. 223 (193–237)% mL/min; p < 0.01] and Lp-PLA2 (4.5 ± 1.9 vs. 3.5 ± 1.3; p < 0.05) plus lower HDL-C [41 (37–49) vs. 52 (48–62) mg/dL; p < 0.01] compared to an age-matched group with TG/HDL-C < 3.0. TG/HDL-C ratio was associated to CETP (p < 0.01) and Lp-PLA2 (p < 0.05). Multiple lineal regression analyses showed TG/HDL-C index as an independent predictor of CETP (r2 = 0.29; beta = 0.49; p < 0.01) and Lp-PLA2 (r2 = 0.21; beta = 0.32; p < 0.05) activities. Conclusion: Children and adolescents with TG/HDL-C ≥ 3.0 presented a more atherogenic lipid profile and higher CETP and Lp-PLA2 activities, which would indicate alterations in lipoprotein metabolism and quality.Fil: Ferraro, Florencia. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: MartĂn, Maximiliano. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Verona, Julian. Hospital Municipal de Balcarce “Dr. Felipe A. Fossatti”; ArgentinaFil: Gilligan, Lisandro. Hospital Municipal de Balcarce “Dr. Felipe A. Fossatti”; ArgentinaFil: Verona, Maria Florencia. Hospital Municipal de Balcarce “Dr. Felipe A. Fossatti”; ArgentinaFil: Botta, Eliana Elizabeth. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Tetzlaff, Walter Francisco. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Lozano Chiappe, Ezequiel Silvano. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Boero, Laura. Universidad de Buenos Aires. Facultad de Farmacia y BioquĂmica; ArgentinaFil: Brites, Walter Fernando. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Nordeste. Instituto de Estudios Sociales y Humanos. Grupo Vinculado Instituto de Investigaciones Linguisticas | Universidad Nacional de Misiones. Facultad de Humanidades y Cs.sociales. Instituto de Estudios Sociales y Humanos. Grupo Vinculado Instituto de Investigaciones Linguisticas.; Argentin