Previous studies conducted in our laboratories have shown that the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is metabolized by fetal hamster respiratory tissues to form DNA-alkylating and clastogenic intermediates. This study was conducted to explore if morphological changes compatible with such events could be detected. Explants of fetal hamster tracheas and lungs were exposed in vitro to various concentrations of NNK and investigated by light and electron microscopy. The explants demonstrated dose dependent preneoplastic lesions in the trachea, while the lung explants exhibited morphological changes compatible with disturbed production and/or release of surfactant.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0304-3835(89)90057-8 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Chapter 7: CLINICAL FORMS AT DIFFERENT AGES OF LIFE: CHILDHOOD, PREGNANCY, LACTATION, OLD AGE.
Ann Endocrinol (Paris)
January 2025
Université Paris-Saclay, Inserm, Endocrine Physiology and Physiopathology, Assistance Publique-Hôpitaux de Paris, Hôpital Bicêtre, Service d'Endocrinologie et des Maladies de la Reproduction and Centre de Référence des Maladies Rares de l'Hypophyse HYPO, F-94270 Le Kremlin-Bicêtre, France. Electronic address:
Primary hyperparathyroidism is rare in children. A germline mutation is identified in half of all children with primary hyperparathyroidism (70% of newborns and infants, and 40% of children and adolescents). The clinical manifestations of primary hyperparathyroidism in children are highly variable (often absent in newborns, rather severe and symptomatic in children and adolescents) and depend on the genetic cause, as well as the severity, rapidity of onset and duration of hypercalcemia.
View Article and Find Full Text PDF2-Ethylhexyl diphenyl phosphate induces lung oxidative stress and pyroptosis in chicks.
Sci Total Environ
January 2025
College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Provincial Education, Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Harbin 150030, China. Electronic address:
2-Ethylhexyl diphenyl phosphate (EHDPHP) is a widely used organophosphorus flame retardant and plasticizer easily released into the environment. Its biological toxicity is of great concern. The lung is considered a possible target organ for EHDPHP, but currently, there are limited studies on the biotoxicity of EHDPHP in poultry lungs.
View Article and Find Full Text PDFBody Temperature Regulation in Domestic Dogs After Agility Trials: The Effects of Season, Training, Body Characteristics, Age, and Genetics.
J Exp Zool A Ecol Integr Physiol
January 2025
Department of Biology, Colgate University, Hamilton, New York, USA.
An animal's body mass is said to be indirectly related to its rate of heat loss; that is, smaller animals with higher surface area to volume tend to lose heat faster than larger animals. Thus, thermoregulation should be related to body size, however, generalizable patterns are still unclear. Domestic dogs are a diverse species of endothermic mammals, including a 44-fold difference in body size.
View Article and Find Full Text PDFToward Safety Protocols for Peripheral Nerve Stimulation (PNS): A Computational and Experimental Approach.
Bioelectromagnetics
January 2025
Department of Electrical Engineering and ITEMS, University of Southern California, Los Angeles, California, USA.
As the clinical applicability of peripheral nerve stimulation (PNS) expands, the need for PNS-specific safety criteria becomes pressing. This study addresses this need, utilizing a novel machine learning and computational bio-electromagnetics modeling platform to establish a safety criterion that captures the effects of fields and currents induced on axons. Our approach is comprised of three steps: experimentation, model creation, and predictive simulation.
View Article and Find Full Text PDFImprovement in Compatibility and Drug Release Performance of Hot-Melt Pressure-Sensitive Adhesives by Physical Blending Technique.
Curr Drug Deliv
January 2025
Department of Pharmaceutical Sciences, School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
Background: Hot-melt Pressure-sensitive Adhesives (HMPSA) are eco-friendly pressuresensitive adhesives, with the potential of being used as substrates for transdermal patches. However, due to the low hydrophilicity of HMPSA, the application is limited in the field of Traditional Chinese Medicine (TCM) plasters.
Methods: Three modified HMPSA were prepared with acrylic resin EPO, acrylic resin RL100, and Polyvinylpyrrolidone (PVP) as the modifying materials.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!