abstract：:The purpose of the study was to investigate the effect of low doses of dopamine in children. Fourteen cases were studied after open heart surgery. Cardiac output and renal parameters were determined under baseline conditions and under continuous infusion of dopamine 2.5 and 5 micrograms/kg/min. During the control peri...

journal_title：Pediatric research

authors： Girardin E,Berner M,Rouge JC,Rivest RW,Friedli B,Paunier L

更新日期：1989-09-01 00:00:00

abstract：:To investigate the role of nutrition in the regulation of IGFs during the perinatal period, 10-d-old rats were infused intravenously with various concentrations of nutrients for 24 h. Breast-fed litter mates served as controls. The effect of caloric intake on concentrations of IGF-I and IGF-II as well as IGF-binding p...

journal_title：Pediatric research

authors： Philipps A,Drakenberg K,Persson B,Sjögren B,Eklöf AC,Hall K,Sara V

更新日期：1989-08-01 00:00:00

abstract：:The effects of ascorbic acid on the excretion of homogentisic acid and its derivative benzoquinone acetic acid were studied in two adults and three infants. The administration of relatively large amounts of ascorbic acid to the adults was followed by a disappearance of benzoquinone acetic acid from the urine, whereas ...

journal_title：Pediatric research

authors： Wolff JA,Barshop B,Nyhan WL,Leslie J,Seegmiller JE,Gruber H,Garst M,Winter S,Michals K,Matalon R

更新日期：1989-08-01 00:00:00

abstract：:Leukotrienes C4 and D4 and thromboxane A2 are potent vasoconstrictors that may mediate pulmonary vasoconstriction in many clinical situations. There is a complex interaction among leukotrienes and thromboxane A2, because inhibition of thromboxane synthesis prevents some of the hemodynamic effects of exogenous leukotri...

journal_title：Pediatric research

authors： Soifer SJ,Schreiber MD,Heymann MA

更新日期：1989-08-01 00:00:00

abstract：:The ontogenetic renal responsiveness to exogenous cortisol was examined in the chronically cannulated ovine fetus. The contribution of effects at proximal and distal tubule of the kidney were studied also. Cortisol (81.5 micrograms/h) was infused into immature ovine fetuses (mean gestational age -113.9 days) on five o...

journal_title：Pediatric research

authors： Towstoless MK,McDougall JG,Wintour EM

更新日期：1989-07-01 00:00:00

abstract：:In artificial tubes as well as in blood vessels with diameters less than 500 microns, blood viscosity decreases with decreasing diameter (Fahraeus-Lindqvist effect). Our study measured viscosity of red blood cells (RBC) from 10 preterm infants, 10 term neonates, and 10 adults by means of a capillary viscometer. RBC we...

journal_title：Pediatric research

authors： Zilow EP,Linderkamp O

更新日期：1989-06-01 00:00:00

abstract：:Dexamethasone (Dex) and triiodothyronine (T3) were administered to pregnant rats during late gestation to evaluate potential developmental effects on fetal lung vitamin K-dependent carboxylation. Maternal rats were injected on the 2 d before study with Dex (0.2 mg/kg intraperitoneally), with T3 (0.7, 3.5, or 7 mg/kg i...

journal_title：Pediatric research

authors： Gallaher KJ,Rannels DE,Rannels SR

更新日期：1989-05-01 00:00:00

abstract：:Permeability of the blood brain barrier (BBB) for bilirubin and 125I-albumin was studied in 2-d- and 2-wk-old piglets. 125I-albumin was given by bolus at the beginning of each study. Hyperbilirubinemia was produced by an initial bolus infusion of bilirubin and sustained at a plasma bilirubin:albumin molar ratio of app...

journal_title：Pediatric research

authors： Lee C,Oh W,Stonestreet BS,Cashore WJ

更新日期：1989-05-01 00:00:00

abstract：:Premature rabbits delivered by cesarean section at 28 d of gestation were each given intratracheally 75 mg/kg of radiolabeled preparation of either natural rabbit surfactant, natural calf surfactant, or surfactant-TA. Each newborn rabbit was ventilated for up to 6 h in a ventilator-plethysmograph with individual adjus...

journal_title：Pediatric research

authors： Seidner SR,Jobe AH,Ruffini L,Ikegami M,Pettenazzo A

更新日期：1989-04-01 00:00:00

abstract：:Clinical studies have suggested that the early stages of bilirubin encephalopathy are reversible. These phenomena are investigated at the cellular level using the neuroblastoma cell line N-115 as a model system. To determine whether the cell line N-115 can recover from bilirubin toxicity, and whether the cellular func...

journal_title：Pediatric research

authors： Amit Y,Poznansky MJ,Schiff D

更新日期：1989-04-01 00:00:00

abstract：:We determined whether closing the ductus arteriosus of the fetal lamb several d before birth would cause persistent pulmonary hypertension after birth. Six experimental fetuses who had their ductus arteriosus ligated 3-17 d before delivery, three control fetuses who had sham ligation of the ductus arteriosus 14 d befo...

journal_title：Pediatric research

authors： Morin FC 3rd

更新日期：1989-03-01 00:00:00

abstract：:Recent studies have shown 1,25(OH)2D3 receptor-mediated modulation of leukocyte proliferation, differentiation, and function. We examined the phagocytosis and killing of microorganisms by neutrophils and monocytes from five patients of three families with hereditary resistance to 1,25(OH)2D3. Phagocytosis of microorga...

journal_title：Pediatric research

authors： Etzioni A,Hochberg Z,Pollak S,Meshulam T,Zakut V,Tzehoval E,Keisari Y,Aviram I,Spirer Z,Benderly A

更新日期：1989-03-01 00:00:00

abstract：:To determine the pathophysiologic significance of pertussis toxin (PT) on the human beta-adrenergic system, beta-adrenoceptor (beta-R)-density and cyclic AMP response of peripheral mononuclear blood cells (MN leukocytes) were studied in children during the paroxysmal stage of natural pertussis infection, after vaccina...

journal_title：Pediatric research

authors： Griese M,Sideropoulou O,Reinhardt D

更新日期：1989-02-01 00:00:00

abstract：:Galactose metabolism was studied in human ovarian tissue obtained from 14 women controls between 21 and 72 y of age, and one 21-y-old galactosemic patient with hypergonadotrophic hypogonadism. Tissue slices were incubated with 1-14C-galactose, and labeled intermediates were analyzed by anion-exchange column chromatogr...

journal_title：Pediatric research

authors： Xu YK,Ng WG,Kaufman FR,Lobo RA,Donnell GN

更新日期：1989-02-01 00:00:00

abstract：:We studied the effects of a diet that was low in fat, high in carbohydrate (CHO) on milk lipid composition and de novo endogenous fatty acid synthesis by the mammary gland in five lactating women. The women consumed either a low fat (LF) (5% fat, 80% CHO) diet or a high fat (HF) (40% fat, 45% CHO) diet. Fat synthesis ...

journal_title：Pediatric research

authors： Hachey DL,Silber GH,Wong WW,Garza C

更新日期：1989-01-01 00:00:00

abstract：:The mitochondria play a major role in the regulation of intracellular calcium. Despite the fact that the enterocytes receive the majority of absorbed calcium, the role of the intestinal mitochondria in calcium transport during maturation is not known. Therefore, the current studies were designed to characterize calciu...

journal_title：Pediatric research

authors： Kikuchi T,Kikuchi K,Arab N,Ghishan FK

更新日期：1989-01-01 00:00:00

abstract：:A specific, enzyme-linked immunoabsorbent assay was used to determine the concentration of the 35,000 mol wt surfactant apoprotein (SP-A) in samples of amniotic fluid obtained from nondiabetic (n = 358) and diabetic (n = 29) women. The enzyme-linked immunoabsorbent assay was performed with rabbit antibodies directed a...

journal_title：Pediatric research

authors： Snyder JM,Kwun JE,O'Brien JA,Rosenfeld CR,Odom MJ

更新日期：1988-12-01 00:00:00

abstract：:The cerebral metabolic effects of hypoglycemia due to intrauterine growth retardation were studied in newborn dogs. Intrauterine growth retardation was induced in newborn dogs after 3 days of maternal nutritional deprivation (birth weight 251 +/- 7 versus 227 +/- 7 g, p less than 0.01). After birth, growth retarded pu...

journal_title：Pediatric research

authors： Kliegman RM

更新日期：1988-11-01 00:00:00

abstract：:Changes in high-density lipoprotein (HDL) subclass distribution were evaluated in a group of premature infants during the early postnatal period to ascertain whether enteral feeding brought about a rapid shift from neonatal to adult-like distributions. All infants were fed a combination of breast milk and formula. Cor...

journal_title：Pediatric research

authors： Genzel-Boroviczény O,D'Harlingue AE,Kao LC,Scott C,Forte TM

更新日期：1988-06-01 00:00:00

abstract：:We evaluated the hypothesis that increased endogenous opioid activity mediates part or all of the left ventricular contractile and pump dysfunction previously demonstrated in HCl-induced metabolic acidemia. Eighteen Western newborn lambs were catheterized and instrumented; pacing wires were sutured to the right atrial...

journal_title：Pediatric research

authors： Fisher DJ,Dreyer WJ,Tate C,Michael L,Smith EO,Entman M

更新日期：1988-06-01 00:00:00

abstract：:In order to study the neonatal microcirculation, the capillary hemodynamics in skin was investigated in 43 full-term infants 2-7 days after birth. The nailfold capillaries of the thumb were visualized by means of television microscopy and the capillary blood cell velocity (CBV) was videophotometrically quantified in 1...

journal_title：Pediatric research

authors： Norman M,Herin P,Fagrell B,Zetterström R

更新日期：1988-06-01 00:00:00

abstract：:Cell-mediated immunity is not well characterized in very low birth weight infants, and abnormalities may represent a significant vulnerability to infection. This report describes 165 serial studies in 58 infants between 700 and 1300 g birth weight during the first 8 wk of life. Two ml of blood were drawn at 2-wk inter...

journal_title：Pediatric research

authors： Bussel JB,Cunningham-Rundles S,LaGamma EF,Shellabarger M

更新日期：1988-05-01 00:00:00

abstract：:Pulmonary surfactant proteins SP-B and SP-C were isolated from lavage fluids of bovine lungs and recombined (lipid/proteins, 9/1, wt/wt) with dipalmitoyl phosphatidylcholine for testing in vitro and in surfactant-deficient adult rats. Using a pulsating bubble surfactometer, we found that inflation pressures of bubbles...

journal_title：Pediatric research

authors： Smith GB,Taeusch HW,Phelps DS,Keough KM

更新日期：1988-05-01 00:00:00

abstract：:Ventilation of immature airways has been shown to result in pressure-induced deformation and alteration of mechanical properties. These changes in mechanical properties may alter the effect of compressive pressures on pressure-flow relationships. To test this hypothesis, unventilated (Group I, n = 8) and ventilated (g...

journal_title：Pediatric research

authors： Penn RB,Wolfson MR,Shaffer TH

更新日期：1988-05-01 00:00:00

abstract：:Neonatal group B streptococcal (GBS) sepsis produces pulmonary arterial hypertension and hypoxemia that are preventable by pretreatment with the selective thromboxane A2 synthase inhibitor, dazmegrel. In the present experiment we administered dazmegrel (8 mg/kg) 2 h after the initiation of a 2 1/2 h infusion of 5 X 10...

journal_title：Pediatric research

authors： Truog WE,Gibson RL,Juul SE,Henderson WR,Redding GJ

更新日期：1988-04-01 00:00:00

abstract：:To further assess bile acid transport by the developing rat liver, we compared the rate of efflux of taurocholate from hepatocytes isolated from suckling and mature rat livers. Cell content of taurocholate (nmol/mg cell protein), after preloading with [14C]-radiolabeled plus cold bile acid (5-100 microM) was similar i...

journal_title：Pediatric research

authors： Belknap WM,Zimmer-Nechemias L,Suchy FJ,Balistreri WF

更新日期：1988-04-01 00:00:00

abstract：:Infants with polycythemia and hyperviscosity are known to have a reduced cerebral blood flow. Eight newborn lambs were studied to determine what effect the reduction in cerebral blood flow might have on the cerebral delivery and uptake of oxygen, glucose, lactate, pyruvate, beta-hydroxybutyrate, and acetoacetate. Meas...

journal_title：Pediatric research

authors： Rosenkrantz TS,Philipps AF,Skrzypczak PS,Raye JR

更新日期：1988-03-01 00:00:00

abstract：:Stimulation of cutaneous thermoreceptors may be an important factor in the initiation of continuous breathing at birth. Maintenance of a patent airway is also important in the continuation of effective ventilation after birth, but whereas in the adult the principal pharyngeal dilator is the genioglossus muscle, in the...

journal_title：Pediatric research

authors： Johnston BM,Gunn TR,Gluckman PD

更新日期：1988-03-01 00:00:00

abstract：:Chronically catheterized fetal lambs (n = 11, gestational age 111-139 days) and neonatal lambs (n = 20, postnatal age 4-30 days) were studied to explore during development the relationship of renal hemodynamic responses during hypoxemia to plasma epinephrine concentration (E), plasma norepinephrine concentration (NE),...

journal_title：Pediatric research

authors： Weismann DN,Robillard JE

更新日期：1988-02-01 00:00:00

abstract：:Inasmuch as taurine biosynthesis is decreased during early postnatal life, an efficient mechanism for taurine uptake by the liver must be present to maintain intracellular stores of this beta-amino acid. Therefore, basolateral liver plasma vesicles prepared from 14-day and adult rats were used to examine taurine trans...

journal_title：Pediatric research

authors： Bucuvalas JC,Goodrich AL,Suchy FJ

更新日期：1988-02-01 00:00:00

abstract：:The fetal respiratory and electrocortical effects of thyrotropin-releasing hormone (TRH) administered into the lateral cerebral ventricles, have been investigated in chronically catheterized unanesthetized fetal sheep at 125-140 days of gestation. Stimulatory effects on fetal breathing movements were seen at doses as ...

journal_title：Pediatric research

authors： Bennet L,Gluckman PD,Johnston BM

更新日期：1988-01-01 00:00:00

abstract：:Vitamin A and its precursor beta-carotene are naturally occurring antioxidants. The effects of diets deficient in beta-carotene and vitamin A on the alveolar-capillary membrane were studied in young adult BALB/C mice before and after exposure to 65% oxygen. One of three diets (standard complete, beta-carotene deficien...

journal_title：Pediatric research

authors： Cohen-Addad N,Bollinger R,Chou J,Poland R

更新日期：1988-01-01 00:00:00

abstract：:Chloroform:methanol extracts of bovine pulmonary surfactant contain small hydrophobic proteins, designated surfactant-associated apoproteins 6,000 (SAP-6), but do not contain the major surfactant-associated 35,000-dalton glycoprotein, designated SAP-35. Examination of lipid extract surfactant on sodium dodecylsulfate-...

journal_title：Pediatric research

authors： Yu SH,Wallace D,Bhavnani B,Enhorning G,Harding PG,Possmayer F

更新日期：1988-01-01 00:00:00

abstract：:The functional activity of naturally acquired IgG and IgM with specificity for the capsular polysaccharide of type III, group B Streptococcus (III-GBS) was compared. Sera collected during convalescence from 14 infants who had developed specific antibodies following III-GBS infection were employed for separation of IgG...

journal_title：Pediatric research

authors： Campbell JR,Baker CJ,Metzger TG,Edwards MS

更新日期：1988-01-01 00:00:00

abstract：:Lung infections are a common cause of morbidity and mortality in neonates. To evaluate neonatal lung defenses against pneumococci, we challenged rats with aerosols of encapsulated pneumococci in an airborne infection apparatus. Whereas adult rats cleared greater than 95% of inhaled type 1 or type 25 pneumococci within...

journal_title：Pediatric research

authors： Coonrod JD,Jarrells MC,Bridges RB

更新日期：1987-12-01 00:00:00

abstract：:Alveolar hypoxia increases pulmonary artery pressure in lambs and sheep but increases lung lymph flow only in lambs; the reasons for this are unknown. To test the hypothesis that hypoxia-induced pulmonary venous constriction could in part explain the fluid filtration response in young lambs, eight young lambs (13 +/- ...

journal_title：Pediatric research

authors： Hazinski TA,Kennedy KA

更新日期：1987-12-01 00:00:00

abstract：:Intracellular levels of cysteine (CSH) and reduced glutathione (GSH) in the kidney and liver of rats from the newborn to the adult period have been determined using a sensitive high performance liquid chromatography method. In the kidney, the intracellular level of free CSH increased 4-fold from 1 to 4 nmol/mg protein...

journal_title：Pediatric research

authors： States B,Foreman JW,Segal S

更新日期：1987-11-01 00:00:00

abstract：:A model of patent ductus arteriosus in premature lambs was created to examine the lamb's ability to handle the volume load imposed by a patent ductus arteriosus and to determine the lamb's ability to handle any additional volume load. Fifteen preterm lambs [133 +/- 2 (+/- SD) days gestation, term 145 days], whose duct...

journal_title：Pediatric research

authors： Clyman RI,Roman C,Heymann MA,Mauray F

更新日期：1987-11-01 00:00:00

abstract：:The development of metabolic acidosis during neonatal sepsis with group B streptococci (GBS) has been attributed to progressive tissue ischemia resulting from reduced oxygen delivery (QO2). Using an animal model of GBS disease, we attempted to test this hypothesis by comparing the development of metabolic acidosis in ...

journal_title：Pediatric research

authors： Meadow WL,Rudinsky BF,Strates E,Komar KJ

更新日期：1987-11-01 00:00:00

abstract：:To determine whether epidermal growth factor (EGF) or EGF-like transforming growth factors (TGFs) are present in ovine fetal tissues, we have tested acid-ethanol extracts of ovine fetal kidney for the ability to induce anchorage-independent growth of normal rat kidney fibroblasts in soft agar and to compete with 125I-...

journal_title：Pediatric research

authors： Freemark M,Comer M

更新日期：1987-11-01 00:00:00