Evaluación bioquímica del estado nutricional en un grupo de puérperas. Estudio preliminar / Biochemical evaluation of nutritional status in a group of puerperal women. Preliminary study

Se determinaron los niveles de proteína transportadora de vitamina A, transtirretina (prealbúmina), transferrina, inmunoglobulina A, fracción C3 de complemento en suero y de inmunoglobulina A total en saliva, en un grupo de 109 mujeres durante los primeros días post-parto. Las muestras de sangre y saliva no estimulada de las pacientes en ayunas se mantuvieron a -20 ºC hasta ser analizadas por inmunodifusión radial en placas de agarosa. Los resultados (media ± DE), expresados como porcentaje de las proteínas totales, fueron: 0,06 ± 0,02; 0,24 ± 0,06; 6,36 ± 1,19; 2,70 ± 0,47 y 3,76 ± 1,17 para proteína transportadora de vitamina A, transtirretina, transferrina, C3 e IgA sérica respectivamente, mientras que los de IgA en saliva fueron de 14,3 ± 10,3 mg/dL. Los valores de proteína transportadora de vitamina A y transtirretina fueron significativamente menores a los de referencia, lo que sugeriría un posible estado nutricional materno deteriorado que no se reflejó en el peso de los recién nacidos

Evaluación bioquímica del estado nutricional en un grupo de puérperas. Estudio preliminar / Biochemical evaluation of nutritional status in a group of puerperal women. Preliminary study

Se determinaron los niveles de proteína transportadora de vitamina A, transtirretina (prealbúmina), transferrina, inmunoglobulina A, fracción C3 de complemento en suero y de inmunoglobulina A total en saliva, en un grupo de 109 mujeres durante los primeros días post-parto. Las muestras de sangre y saliva no estimulada de las pacientes en ayunas se mantuvieron a -20 ºC hasta ser analizadas por inmunodifusión radial en placas de agarosa. Los resultados (media ± DE), expresados como porcentaje de las proteínas totales, fueron: 0,06 ± 0,02; 0,24 ± 0,06; 6,36 ± 1,19; 2,70 ± 0,47 y 3,76 ± 1,17 para proteína transportadora

Parámetros séricos del metabolismo del hierro en mieloma múltiple / Serum iron parameters in multiple myeloma

Las células normales y neoplásicas tienen similares necesidades de hierro, pero las últimas pueden exhibir mecanismos alterados de adquisición y secuestro del metal que les permiten continuar multiplicándose en tejidos del huésped, aun en condiciones de restricción del nutriente. El presente trabajo tuvo como objetivo investigar los parámetros séricos del metabolismo del hierro en pacientes con Mieloma Múltiple (MM), y compararlos con los correspondientes a una población normal. En 48 pacientes con el cáncer hematolÞgico se determinó Hierro (A/dl) e Indice de Saturación de la Transferrina (por ciento) por métodos colorimétricos, Ferritina (ng/ml) por IRMA y Transferrina (mg/dl) por inmunodifusión radial. El grupo control estuvo constituido por 40 individuos sanos, correspondientes en edad y sexo. En el grupo pacientes se encontraron valores significativamente elevados (P<0,00001) de Ferritina sérica (x=504,6 ng/ml ± 386,2) y de Indice de Saturación de la Transferrina (x=45 por ciento ± 14,9) comparados con los controles (x=86,7 ng/ml ± 30 y x=29,9 ng/ml ± 8,36, respectivamente). Niveles significativamente más bajos de Transferrina sérica (P<0,00001) se observaron en el grupo pacientes (x=270 mg/dl ± 102,1) respecto a los controles (x=360 mg/dl ± 57,3).No hubo diferencias significativas (P=0,8189) entre la Ferremia del grupo pacientes (x=100,85 Ag/dl ± 56,2) y los controles (x=98,6 Ag/dl ± 32,4). Los resultados obtenidos mostraron un metabolismo del hierro aberrante en MM, que podría favorecer el crecimiento celular maligno y la susceptibilidad a infecciones, e inhibir funciones inmunes (AU)

Efecto de una vacuna antisarampión como modelo de infección viral leve sobre la transferrina medida funcional e inmunoquímicamente / Effect of measles vaccine as a mild viral infection model on serum transferrin

Con el objeto de validar la medición de transferrina sérica como indicador de nutrición calórico-proteica y de estado nutricional de hierro durante la infección viral leve, se estudiaron 47 lactantes, sanos y eutróficos de 12 meses de edad, antes y después de 9 y 30 días de haber recibido una vacuna antisarampión de rutina. La proteína fue determinada tanto en relación a su capacidad de unir hierro (TIBC), como a su calidad inmunoquímica (RID). Al día 8 ñ 2, el 81% de los niños presentaron un alza febril de 1 a 3 días de duración. En este estudio, ambos métodos mostraron una correlación positiva baja, lo que no permitiría a su conversión (r= 0,63 y 0.69 al día 0, 9 y 30 respectivamente). Este modelo de infección viral, la capacidad funcional de la proteína (TIBC) permaneció inalterada, por lo cual se le consideraría como un índice válido en la evaluación de la nutrición de hierro en esta condición. Debido a que la transferrina (TFN) disminuyó significativamente al día 9 post-vacunación (p< 0,01) en el grupo febril, su interpretación como indicador de estado nutricional debe considerar datos clínicos adicionales

Immunochemical assays for IgG, IgA, IgM and transferrin compared.

We compared immunochemical methods for determining IgG, IgA, IgM, and transferrin in serum by studying calibrator crossover, patient comparison, and, for a newly developed technology, normal reference intervals. For the immunoglobulins, we compared radial immunodiffusion (RID), rate nephelometry using the Beckman ICS, and a new nephelometric method adapted to the Abbott TDx; for transferrin we compared the ICS, TDx, and immunoturbiditry. The methods examined for quantifying IgA and transferrin showed good agreement in calibrator crossover and patient comparison studies. In studies comparing IgG methods, the ICS and TDx demonstrated acceptable agreement, although neither showed accordance with RID. For IgM determination, crossover studies and patients having less than 4300 mg/L in this protein showed good agreement, even though more elevated samples, run on the TDx, showed a discrepancy in proportionally compared to the other two methods. Normal reference intervals (95% confidence limits) determined on the TDx agreed well with those established for the other immunochemical methods.

Plasma transferrin levels in abnormal endocrine states. II. The changes in various endocrine states.

The clinical significance of the measurement of plasma transferrin (Tf) in patients with hypophysial disorders was reported in our previous paper. In the present study, we determined plasma Tf levels in 55 patients with various endocrine states and considered their clinical significance compared with plasma somatomedin-C (SM-C) levels. Plasma Tf levels decreased significantly in patients with anorexia nervosa (P less than 0.02), hyperthyroidism (P less than 0.05), primary hypothyroidism (P less than 0.05), and Cushing's syndrome (P less than 0.05), while they were elevated significantly in pregnancy (P less than 0.01) or females using estrogens (P less than 0.05). The former two declines were considered a reflection of the malnutritional state since a significant negative correlation was observed between plasma Tf levels and the percentile deficit from the ideal body weight in patients with anorexia nervosa (P less than 0.01), or between plasma Tf and elevated T3 levels which induce hypermetabolism in patients with hyperthyroidism (P less than 0.01). A significant correlation was observed between the SM-C and Tf levels in these subjects (including normal controls and patients with hypophysial disorders) as a whole (r = 0.79, P less than 0.001). These data indicate that plasma Tf is changeable according to the endocrine and nutritional conditions with good correlation to the SM-C, and it is suggested that Tf also operates as a growth factor in vivo.

[Anemia in malignant tumor diseases. V. The relation of tumor-induced hypotransferrinemia and the degree of anemia]. / Die Anämie bei malignen Tumorerkrankungen. V. Die Beziehung zwischen der tumorbedingten Hypotransferrinämie und dem Grad der Anämie.

Transferrin is a growth factor in malignancy. In this function, transferrin is taken up into the proliferating malignant cell. The tumor-induced loss of circulating transferrin results in a hypotransferrinemia which correlates with tumor mass and proliferation rate. The cellular uptake of iron into the erythropoietic precursors depends on the presence of iron-saturated transferrin. Thus, iron utilization for the hemoglobin synthesis correlates with the transferrin concentration in blood. In 256 patients with malignancies of different histological types and different tumor extension a strong correlation was found between the degree of tumor-induced hypotransferrinemia and anemia. This correlation between transferrin concentration and hemoglobin concentration could be demonstrated in the different histological tumor entities. Tumor progression was accompanied by a progressive fall in transferrin concentration and hemoglobin concentration. By contrast, tumor remission achieved by an effective antineoplastic therapy resulted in an improvement of hypotransferrinemia and anemia. These variations in the two parameters were found to be strongly correlated. We conclude from our data that tumor-induced loss of transferrin is one of the most important factors responsible for the development of anemia in malignancy.

Protracted anemia associated with chronic, relapsing systemic inflammation induced by arthropathic peptidoglycan-polysaccharide polymers in rats.

Mild hypoproliferative anemia with abnormal iron metabolism frequently accompanies chronic inflammation and infection in humans. To determine whether anemia is associated with chronic relapsing arthritis induced by bacterial cell wall polymers, serial determinations of the hematocrit were measured in rats injected intraperitoneally with sonicated peptidoglycan-polysaccharide fragments from group A streptococci. Acute anemia peaked 5 to 10 days after injection, and chronic, spontaneously relapsing anemia persisted for 309 days. 51Cr labeling demonstrated decreased erythrocyte survival, i.e., a half-life of 8.4 days in cell wall-injected rats versus 11.8 days in controls. Erythrocytes were mildly microcytic, and leukocyte counts were elevated during early spontaneous reactivation of arthritis, 15 days after injection of peptidoglycan-polysaccharide. Bone marrow myeloid/erythroid precursor ratios were elevated in arthritic rats (P less than 0.0001). Purified peptidoglycan produced an acute anemia lasting 10 days, while injection of group A streptococcal polysaccharide and mutanolysin-digested cell wall did not affect the hematocrit. The minimal effective dose of peptidoglycan-polysaccharide was 5 micrograms of rhamnose per g (body weight). Serum iron and transferrin levels were decreased in cell wall-injected rats (P less than 0.005) and were closely correlated with hematocrit values and joint inflammatory scores. Stainable iron was increased in the liver, spleen, and mesenteric lymph nodes and unchanged in the bone marrow of cell wall-injected rats. Anemia accompanying chronic, relapsing systemic inflammation induced by peptidoglycan-polysaccharide polymers appears to be an excellent animal model of the anemia of chronic disease.

Iron nutrition in childhood malignancy.

Status of iron nutrition along with demographic, anthropometric, dietary, and biochemical parameters were recorded in 98 pediatric cancer patients at the time of referral. Dietary intake in each patient was analyzed for calories, protein, and iron. Blood specimens were analyzed for hemoglobin (Hgb), hematocrit (Hct), iron, total iron-binding capacity (TIBC), transferrin, and ferritin. Dietary intake measures were assessed according to each subject's Recommended Dietary Allowance (RDA). The results were compared among three diagnostic groups, namely, benign, solid tumor, and hematopoietic. The nutrient lowest in intake was iron. The overall measures revealed significant differences between the benign and hematopoietic groups in all parameters except TIBC and transferrin. A correlation coefficient of 0.55 (p less than 10(-5) between transferrin and TIBC was generated in our patients. Significant differences were noted for ferritin in the acute lymphocytic leukemia (p = 0.0001) and lymphoma (p = 0.0007) groups when compared with the benign group. A correlation coefficient of 0.55 (p less than 10(-5) was generated in our patients. A 3-month follow-up assessment was conducted in order to document the effects of therapy. Tumor response and progression was compared to changes in ferritin levels from baseline to follow-up. Our results support the literature, that ferritin is a sensitive tumor marker in various malignancies.

Serum transferrin levels in the longitudinal assessment of protein-energy status in preterm infants.

We prospectively measured serum transferrin levels weekly from birth until discharge in 33 preterm newborn infants hospitalized on the newborn intensive care unit (n = 130 weeks) to study whether transferrin levels accurately reflect recent nutritional intakes and predict subsequent changes in anthropometric measurements and serum protein levels. Mean daily protein and caloric intakes were no greater during weeks when transferrin levels increased than when levels decreased. There were weak but statistically significant linear relationships between protein intake and transferrin levels (r = 0.24, p less than 0.01), caloric intake and transferrin levels (r = 0.27, p less than 0.01), and magnitudes of weekly changes in protein intake and transferrin levels (r = 0.31, p less than 0.001), and magnitudes of weekly changes in caloric intake and transferrin levels (r = 0.27, p less than 0.01). Transferrin levels did not reflect same-week weight or midarm circumference (MAC) gains, nor did they predict the following week's gains. Mean anthropometric measurement gains were similar following weeks when transferrin levels increased or decreased. There were no positive linear relationships between the magnitudes of changes in transferrin levels and same-week weight gain (r = -0.35), same-week MAC gain (r = -0.27), or following-week MAC gain (r = 0.01). Weak correlations were found with following-week albumin levels (r = 0.32, p less than 0.001) and with same-week transthyretin levels (r = 0.44, p less than 0.001). Weekly serum transferrin levels are not useful for longitudinal surveillance of protein-energy status in preterm infants.

The effect of ibuprofen on postburn metabolic and immunologic function.

Patients suffering severe trauma, including thermal injuries, demonstrate both a hypermetabolic response and an immunosuppressed state following the injury. Biochemically, these patients produce extremely large amounts of cyclooxygenase products, including prostaglandin E. We have investigated the effect of a drug, ibuprofen, which blocks the synthesis of prostaglandins in a burned rat model. Ibuprofen at high doses was found to significantly diminish the hypermetabolic response to burn injury and sepsis. The same dosage of ibuprofen increased the mortality rate in the same burn sepsis model. Prostaglandin E may therefore exert some beneficial effects in traumatized patients by altering their metabolism.

Transferrin and mitochondrial aspartate aminotransferase in young adult alcoholics.

Two recently proposed biochemical markers of alcoholism, namely, quantitation of plasma transferrin variant (Tf5.7) and the ratio of plasma mitochondrial aspartate aminotransferase (m-AspAT) to total AspAT (t-AspAT), were tested for their ability to detect young adult alcoholics. Another commonly used biochemical test, namely, activity of plasma gamma glutamyltransferase (GGT) was included as a comparison. Although mean values of GGT, TF5.7, total transferrin (Tftot), m-AspAT and t-AspAT in alcoholics were significantly higher than those in controls, there were too many overlapping values in each test between alcoholics and controls to render any of these tests suitable as a marker for young adult alcoholics. Depending on cut-off limits, the sensitivity of each test ranged from 0-52% and the specificity ranged from 80-97%. Moreover, the m-AspAT/t-AspAT and Tf5.7/Tftot ratios were not significantly different between alcoholics and controls. A stepwise linear discriminant function analysis of all the variables resulted in a slight increase in classification sensitivity (66%) but a decrease in specificity (77%). The relatively short duration (mean = 5.6 years) of heavy alcohol intake and the time elapsed (mean = 5.8 days) since the alcoholics last consumed alcohol very likely contributed to the low sensitivity. Young adults might also be more resilient with regard to the damaging biochemical effects of ethanol. Abnormal biochemical values might reverse to normal values much more quickly in young adult alcoholics than in those who are older and have more years of alcohol abuse.

[Indices of iron metabolism in newborn infants and children in the 1st year of life]. / Pokazateli obmena zheleza u novorozhdennykh i detei pervogo goda zhizni.

Biochemical parameters of iron metabolism have been examined in 36 newborns born to mothers with normal iron metabolism and in 58 healthy children aged under one year. Normal values of serum iron, serum transferrin and ferritin, and of transferrin saturation with iron in newborns and infants aged under one are presented.

TSF, RBP and TBPA as nutritional indices in surgical patients with gynecological cancer.

The Authors investigated the usefulness of some biochemical markers of visceral protein synthesis (TSF, TBPA and RBP) in 24 patients affected with gynecological cancer and treated with Total Parenteral Nutrition in the perioperative period. The absence of an improving TSF and TBPA is related to increased morbidity and mortality.

[Reference values of erythrocyte ferritin in children and adults]. / Valeurs de référence de la ferritine érythrocytaire chez l'enfant et l'adulte.

The erythrocyte ferritin content was measured in 183 healthy subjects in age from 4 to 68 years; 80 were male and 103 were female. In children between the ages of 4 and 12 years there is no significant difference in the mean value between boys and girls. In females the erythrocyte ferritin concentration is independent of age. After 12 years of age the erythrocyte ferritin content is higher in men. Reference intervals were determined by the two quantiles 0.05 and 0.95. The reference interval is 3-24 age by cell in boys between 4 and 12 and females between 4 and 63; the reference interval is 5-38 age by cell in males between 13 and 68 years of age.

Maintenance of visceral protein levels in serum during postoperative parenteral nutrition.

Nitrogen metabolism and plasma insulin level were studied postoperatively in 14 patients (six males and eight females) with a disease of the upper gastrointestinal tract and therefore operated on electively. The patients received one of the two isocaloric parenteral nutrition regimens postoperatively: one, on the average, with 1.2 g of amino acids/kg/day and the other with 3.1 g of amino acids/kg/day. During postoperative intravenous alimentation rich in amino acids the cumulative nitrogen balance over 3 days was +13.1 (interval from -1.3 to +21.4) gN but -10.1 (interval from -12.1 to -2.4) gN during parenteral nutrition with a smaller amount of amino acids. The difference was significant (p less than 0.001). During parenteral nutrition rich in amino acids the changes of the serum albumin level, ie, -0.4 (SEM 1.1) g/liter, and of the serum transferrin level, ie; -0.16 (SEM 0.22) g/liter, were statistically insignificant (p greater than 0.05). During intravenous alimentation poor in amino acids serum albumin decreased by 3.8 (SEM 1.2) g/liter (p less than 0.01) and serum transferrin by 0.44 (SEM 0.05) g/liter (p less than 0.001). The differences of the changes between the groups were significant (p less than 0.01 and p less than 0.01, respectively). These various effects of the two parenteral nutrition regimens were not dependent on the different fluid balances during intravenous alimentation or on the different plasma insulin levels. It is concluded that a rich supply of amino acids--more than 1.2 g/kg/day--in postoperative parenteral nutrition better maintains the visceral protein levels in the serum, which possibly depends on the greater protein production in the liver.

Predictive ability of various nutritional variables for mortality in elderly people.

Nutritional indices (percentage ideal body weight [IBW], serum albumin, serum transferrin, total lymphocyte count [TLC] and delayed cutaneous hypersensitivity [DH] response) were assessed in 80 consecutive patients (aged 85-100 y) within 24 h of admission to determine their predictive value for mortality. Nine patients died. Pearson correlation analysis demonstrated that death was significantly (p less than 0.05 to less than 0.01) associated with sepsis, serum albumin less than 30 g/L, TLC less than or equal to 1500 cells/mm3, and percentage IBW less than or equal to 90%. However, when serum albumin was controlled for, logit regression analyses demonstrated that the impact of other nutritional indices on death was insignificant. The effect of serum albumin remained significant (p less than 0.05 to less than 0.01) even when age and physician's diagnosis were held constant. With the logit model, serum albumin greater than or equal to 30 g/L had a sensitivity of 0.33, specificity of 0.99, and overall predictive power of 0.91. Serum albumin is thus the simplest and best single predictor of mortality and can provide early identification of elderly people at increased risk of death.

Carbohydrate-deficient transferrin (CDT) in serum in women with early alcohol addiction.

Carbohydrate-deficient transferrin (CDT) in serum was determined by micro anion exchange chromatography and a transferrin radioimmune assay in 58 consecutive women treated for early alcohol dependence compared, with 62 healthy females with an alcohol consumption of 0-15 g of ethanol/day. The upper normal CDT level was 74 mg/l. CDT was elevated above this value in 83% of the alcoholic women with an intake of 60 g of ethanol/day or more for at least 7 days within the preceding two weeks. CDT values were significantly positively correlated with daily alcohol consumption but not with GT, ASAT, ALAT or MCV. During abstinence CDT level declined exponentially with a half-life of 14 +/- 3 days. The results indicated that CDT may be as sensitive and specific a marker in women with early alcohol addiction as in previously studied male alcoholics. The amount of alcohol consumed appeared to be more important than sex or liver function. Determination of CDT may thus offer a means for early objective diagnosis and adequate treatment also of women in early stages of alcoholism.