Alloxan injections (200 mg/kg i.v.) into guinea pigs led to a significant decline of serum insulin levels and a marked inhibition of normal weight gain during the first 96 hr following treatment. Both of these parameters tended to normalize between 96 and 120 hr after treatment. However, neither hyperglycemia nor glycosuria occurred at any time. Volume densities of islet B cells (= volume density of islet cells immunostained for insulin per islet volume density) decreased and pyknotic nuclei appeared in the islets during the initial 48 hr after alloxan treatment. Islet B-cell volume density then returned to normal over the ensuing 24 hr, and remained normal up to 120 hr following administration of alloxan. In summary, after high doses of alloxan were given guinea pigs, serum insulin levels were reduced below control levels within 24 hr; this was associated with changes in body weight which paralleled changes in insulin levels more closely than did levels of blood or urine glucose; the volume density of immunostained B cells initially decreased and then returned to control levels by 72 hr following alloxan injection. The alloxan-treated guinea pig may represent a unique model for studying the restoration of insulinogenic capacity in insulinopenic diabetes.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
3D evaluation of changes in mandibular condyle morphology following orthognathic surgery in patients with maxillomandibular asymmetry: A retrospective study.
J Craniomaxillofac Surg
January 2025
Ankara University, Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Ankara, Turkey.
Symmetry is integral for the balance and function of the craniofacial complex and making precise diagnosis of asymmetric craniofacial structures is crucial for treatment planning. This study focuses on maxillomandibular asymmetry, examining its impact on condylar resorption and trabecular bone morphology changes following orthognathic surgery. Cone-beam computed tomography (CBCT) scans of patients with and without asymmetry were analyzed pre- and post-surgery.
View Article and Find Full Text PDFGelatin methacryloyl-phenylboronic acid/Hydroxyadamantane self-healing microgels for the periodontitis treatment by promoting alveolar bone regeneration.
Int J Biol Macromol
January 2025
Department of cariology and Endodontology, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, Beijing 100081, PR China.
Periodontitis is a chronic inflammatory condition mainly caused by the interaction between the host immune system and periodontal tissue pathogens, and may lead to consequences, such as alveolar bone defects and tooth loss. Incomplete bacterial removal, persistent inflammation and high reactive oxygen species (ROS) environment are the main challenges for periodontal tissue repair and alveolar bone regeneration. In this study, an injectable composite microgel (Gelatin methacryloyl-Phenylboronic acid/Hydroxyadamantane, GPH) loaded with antimicrobial peptide (AMP) and cerium dioxide (CeO) microspheres was developed to achieve a synergistic function of bacteriostasis, immunomodulation, and ROS removal.
View Article and Find Full Text PDFFlexible multifunctional Janus film towards self-healing, self-adhesive and streachable EMI shielding.
J Colloid Interface Sci
January 2025
Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China. Electronic address:
As smart electronic devices proliferate rapidly, concerns about electromagnetic radiation have become more prominent. Traditional electromagnetic shielding materials typically use three-dimensional porous foams, carbon structures, and film materials as their substrates. However, as electronic devices become more miniaturized, integrated, and precise, the large volume and limited functionality of foam materials have constrained their applications.
View Article and Find Full Text PDFHigh Areal Loading Silicon Nanoparticle-Based Lithium-Ion Batteries.
ACS Appl Mater Interfaces
January 2025
Electrical & Computer Engineering Department, Montana State University, Bozeman, Montana 59717, United States.
Interfacial mechanical stability between silicon (Si) and the current collector is crucial when high areal-loading of Si is demanded as intense stress develops at the interface due to its extreme volume alteration during the lithiation-delithiation process. Therefore, we propose using a thin, rough, porous, and highly conductive carbon nanotube network (CNT-N) as a buffer layer between the Si and current collector that provides abundant anchor sites for Si nanoparticles. The strong and elastic CNT-N, which is not involved directly in the lithiation process, reduces stress at interfaces between the Si and CNT-N and the CNT-N and current collector.
View Article and Find Full Text PDFDedenser: A Python Package for Clustering and Downsampling Chemical Libraries.
J Chem Inf Model
January 2025
Analytical Research & Development, MRL, Merck & Co., Inc., Rahway, New Jersey 07065, United States.
The screening of chemical libraries is an essential starting point in the drug discovery process. While some researchers desire a more thorough screening of drug targets against a narrower scope of molecules, it is not uncommon for diverse screening sets to be favored during the early stages of drug discovery. However, a cost burden is associated with the screening of molecules, with potential drawbacks if particular areas of chemical space are needlessly overrepresented.
View Article and Find Full Text PDFWant 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!