Abstract:
:Aspiration is a major cause of lung disease in infants and young children. As the symptoms and signs of aspiration are not specific, the diagnosis is delayed due to a low index of suspicion and low sensitivity and specificity of the available diagnostic tests. In the present study, we evaluated the utility of microspheres composed of a degradable polymer, polylactic glycolic acid (PLGA), as a marker to diagnose aspiration in hamsters. Thirty hamsters underwent direct tracheal instillation of 0.1 mL of a suspension of PLGA. Eighteen other animals served as controls and underwent tracheal instillation of 0.1 mL of saline. Three animals served as naive controls and had no tracheal instillation. Five animals from the PLGA group and three from the saline group underwent whole-lung lavage (WLL) on days 1, 8, 15, 29, 43, and 58. PLGA microspheres were easily identified under light microscopy inside the alveolar macrophages obtained from WLL in all PLGA-instilled animals during all studied days. The number and size of PLGA microspheres within the alveolar macrophages decreased gradually with time with a 90% rate of disappearance of about 36 d. There was a marked neutrophilic response in lung lavage and a mild peribronchial neutrophil infiltration on the first day after tracheal instillation of PLGA which subsequently disappeared. We conclude that PLGA microspheres are a sensitive and specific marker for aspiration in hamsters. The usefulness of this test in diagnosing aspiration in humans should be further evaluated in clinical studies.
journal_name
Pediatr Resjournal_title
Pediatric researchauthors
Springer C,Benita S,Sherman Y,Gursoy N,Gilhar D,Avital Adoi
10.1203/01.pdr.0000176910.62067.a0subject
Has Abstractpub_date
2005-09-01 00:00:00pages
537-41issue
3eissn
0031-3998issn
1530-0447pii
58/3/537journal_volume
58pub_type
杂志文章abstract::A dietary-related deficiency of docosahexaenoic acid [C22:6(n-3)] in infant cerebral cortex has been identified. Absence or very low rates of hepatic synthesis from the essential fatty acid precursor, alpha-linolenic acid [C18:3(n-3)], in early life may have been a contributory factor. We have analyzed liver total lip...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199509000-00015
更新日期:1995-09-01 00:00:00
abstract::Carnitine palmitoyltransferase (CPT) consists of two activities located in the outer (CPT I) and the inner (CPT II) mitochondrial membranes. CPT II deficiency in the adult as well as in the infantile form of the disease has been shown to result from mutations in the CPT II cDNA. Nothing is known regarding the genetic ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199610000-00005
更新日期:1996-10-01 00:00:00
abstract::Several neuropathologic findings in infants and children with human immunodeficiency virus type-1 (HIV-1) infection are different from those observed in adults, probably related to the fact that the retroviral infection occurs in the setting of neuro-development. This report describes the interaction and biologic acti...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199511000-00025
更新日期:1995-11-01 00:00:00
abstract:BACKGROUND:Early brain development is closely dictated by distinct neurobiological principles. Here, we aimed to map early trajectories of structural brain wiring in the neonatal brain. METHODS:We investigated structural connectome development in 44 newborns, including 23 preterm infants and 21 full-term neonates scan...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/s41390-018-0138-1
更新日期:2018-12-01 00:00:00
abstract:BACKGROUND:Social determinants of health (SDH) can substantially impact health outcomes. A systematic review, however, has never been conducted on associations of SDH with congenital heart disease (CHD) outcomes. The aim, therefore, was to conduct such a systematic review. METHODS:Seven databases were searched through...
journal_title:Pediatric research
pub_type: 杂志文章,评审
doi:10.1038/s41390-020-01196-6
更新日期:2020-10-17 00:00:00
abstract:BACKGROUND:Bronchopulmonary dysplasia (BPD) is an important cause of morbidity. The aim of this study was to evaluate the preventive effect of cytidine 5'-diphosphocholine (CDP-choline) treatment on hyperoxic lung injury in a neonatal rat model. METHODS:A total of 30 newborn pups were divided into control, hyperoxia, ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/pr.2013.68
更新日期:2013-07-01 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
pub_type: 杂志文章
doi:10.1203/00006450-198904000-00024
更新日期:1989-04-01 00:00:00
abstract::The copper concentrations in organs of developing Long-Evans Cinnamon (LEC) rats (2 d to 13 mo) were measured to elucidate the pathogenesis of their hereditary hepatitis. Hepatic copper contents of LEC rats were significantly higher than those of control rats (26 to 92 times higher). The subcellular distribution of he...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199203000-00011
更新日期:1992-03-01 00:00:00
abstract::Studies were conducted to assess the efficacy and safety of a synthetic peptide-containing surfactant in the treatment of respiratory distress syndrome (RDS) in preterm (approximately 80% of normal gestation) infant rhesus monkeys. Surfactant was prepared consisting of the phospholipids dipalmitoylphosphatidyl choline...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199604000-00025
更新日期:1996-04-01 00:00:00
abstract:BACKGROUND:Oral propranolol, a nonselective β-blocker, is able to reduce the progression of retinopathy of prematurity in newborns, but it appeared unsafe. This study aimed to find, in rabbits, a propranolol eye drop concentration able to induce lower plasma but higher retinal concentrations than those obtained after o...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/pr.2014.108
更新日期:2014-10-01 00:00:00
abstract::In the human fetus, liver macrophages appear to be the primary source of erythropoietin (Epo). Epo production shifts from the liver to peritubular cells in the kidney sometime during the 3rd trimester. Some preterm infants experience a hyporegenerative anemia that appears to be caused by inadequate Epo production. It ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199402000-00008
更新日期:1994-02-01 00:00:00
abstract::Carlo Agostoni, MD, and Kwang Sik Kim, MD, are the Guest Editors for this annual review issue on Nutrition and the Microbiome. Dr Agostoni is a Professor of Pediatrics at the Department of Clinical Sciences and Community Health, University of Milan, within the Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, ...
journal_title:Pediatric research
pub_type: 历史文章
doi:10.1038/pr.2014.195
更新日期:2015-01-01 00:00:00
abstract::A double-label, double-substrate incubation technique has been developed and used to study the conversion of progesterone to testosterone in testes extracts from incompletely virilized males. The procedure involves separation of the microsomes from a testicular homogenate, incubating the microsomes with 1 microM [7-3H...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198408000-00018
更新日期:1984-08-01 00:00:00
abstract::The effects of an emulsified intravenous fat preparation (Intralipid) on bilirubin transport were analyzed by cholestyramine extraction, spectrophotometric analysis, Sephadex gel filtration, peroxidase assay, bilirubin uptake by red blood cells, and by toxicity in tissue culture (L-929) cells. Intralipid is capable of...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-197703000-00004
更新日期:1977-03-01 00:00:00
abstract::The effect of intrauterine growth retardation (IUGR) on cerebral and adrenal monoamine metabolism was studied in the fetuses of eight nulliparous rat dams after unilateral uterine artery ligation on d 18 of gestation. On d 22 (term = 23 d), four dams were subjected to normoxia and four to hypoxia (10% O2) for 58 min w...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199202000-00008
更新日期:1992-02-01 00:00:00
abstract:BACKGROUND:Following our clinical observation of tonic responses in response to the knee jerk in infants at very high risk for cerebral palsy (VHR infants), we systematically studied tonic responses, clonus, and reflex irradiation. We questioned (i) whether these responses occurred more often in VHR infants than in typ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/pr.2016.99
更新日期:2016-09-01 00:00:00
abstract::In human infants and newborn rats, white light at the intensity used to treat hyperbilirubinemia lowers serum calcium concentration. Occipital shielding or (in newborn rats) exogenous melatonin prevents this effect. Propranolol, by inhibiting melatonin synthesis, also causes hypocalcemia, which is preventable by melat...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199006000-00006
更新日期:1990-06-01 00:00:00
abstract::Early detection of developmental delay and childhood disorders are important for early intervention. This study aimed to describe the distribution of responses in a large population-based survey, identify cutoff points for the parent concern checklist (PCC) suitable for the Chinese language and culture, and explore ho...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/PDR.0b013e3181c8ed3d
更新日期:2010-02-01 00:00:00
abstract::We used quin2, a high affinity fluorescent calcium indicator to measure free cytosolic Ca++ in neutrophils isolated from fresh heparinized blood of 13 cystic fibrosis (CF) patients (age range 6-32 yr) and 11 healthy individuals (age range 25-41 yr) as controls. The mean value of free cytosolic Ca++ for CF patients was...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198519040-00006
更新日期:1985-04-01 00:00:00
abstract::This study characterizes cardiorespiratory dysregulation in young girls with MECP2 mutation-confirmed Rett syndrome (RS). Respiratory inductance plethysmography of chest/abdomen and ECG was obtained during daytime wakefulness in 47 girls with MECP2 mutation-confirmed RS and 47 age-, gender-, and ethnicity-matched cont...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/01.pdr.0000238302.84552.d0
更新日期:2006-10-01 00:00:00
abstract::We investigated the early postnatal changes of the mesenteric circulation and its relation to the systemic circulation in 15 preterm infants. The infants were studied before the first feeding on d 1 and pre- and postprandially on d 3, 4, 5, and 7. Blood flow velocity was measured by ultrasound Doppler in the superior ...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199602000-00015
更新日期:1996-02-01 00:00:00
abstract::The antiendotoxin effect of polymyxin B was investigated in experimentally induced septicemia in rabbits. The Pasteurella multocida organisms were sensitive to the antibacterial action of penicillin but not to polymyxin B. Animals pre-treated with polymyxin showed positive blood cultures and significantly reduced plas...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-197901000-00011
更新日期:1979-01-01 00:00:00
abstract::We studied healthy and saline lavaged rabbits during high frequency oscillatory ventilation to determine what combination of frequency (f), tidal volume (Vt), and mean airway pressure (Paw) produced the lowest peak-to-peak alveolar pressure amplitude (Palv) and physiologic blood gas tensions. Sinusoidal volume changes...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199001000-00018
更新日期:1990-01-01 00:00:00
abstract::The objective of this study was to obtain insight into bone formation and resorption in children with newly diagnosed untreated acute lymphoblastic leukemia (ALL). In 23 consecutive children with ALL, a bone biopsy was taken from the crista iliaca posterior under ketamine anesthesia, together with the diagnostic marro...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/01.PDR.0000090929.16450.DE
更新日期:2003-12-01 00:00:00
abstract:BACKGROUND:The aim of this study is to compare new pediatric nomograms for clinical parameters from 2D echocardiography. METHODS:2D pediatric echocardiographic parameters from four recent nomograms were used for statistical analysis. To assess the accuracy of the predictive models from each study, namely multivariate,...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1038/s41390-020-0900-z
更新日期:2020-04-24 00:00:00
abstract::GH insensitivity may be an inherited condition or may arise as a consequence of disease of malnutrition. Laron syndrome is the most severe form of GH insensitivity, arising from an absent or defective GH receptor. Less severe forms of GH insensitivity, however, may exist, resulting in short stature but in few other fe...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199605000-00018
更新日期:1996-05-01 00:00:00
abstract::Obese children have a great risk of hypertension and cardiovascular morbidity in adults. The insulin-like growth factor type II (IGF-II) regulates glucose homeostasis, cardiovascular functions, and lipid metabolism. IGF2 gene variants have shown a strong association with weight, body mass index (BMI), and metabolic pr...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/PDR.0b013e3181d22757
更新日期:2010-04-01 00:00:00
abstract::The activity of lysozyme in saliva and serum was determined in 51 patients with cystic fibrosis. Measurements were made on two occasions at least 1 month apart and compared to those of 25 normal healthy individuals of the same ages, sex, and race. The mean serum lysozyme activity of normal individuals was 5.8 microgra...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198210000-00014
更新日期:1982-10-01 00:00:00
abstract::Children with inborn errors of urea synthesis who survive neonatal hyperammonemic coma commonly exhibit cognitive deficits and neurologic abnormalities. Yet, there is evidence that ammonia is not the only neurotoxin. Hyperammonemia appears to induce a number of neurochemical alterations. In rodent models of hyperammon...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199210000-00021
更新日期:1992-10-01 00:00:00
abstract::Topical emollient therapy may reduce the incidence of serious infections and mortality of preterm infants in developing countries. We tested whether emollient therapy reduced the burden of pathogens on skin and/or prevented bacterial translocation. Neonates <33 wk gestational age were randomized to treatment with sunf...
journal_title:Pediatric research
pub_type: 杂志文章,随机对照试验
doi:10.1203/pdr.0b013e3180459f75
更新日期:2007-05-01 00:00:00