Acid phosphatase (ACP) activity was investigated in the photoreceptive pineal gland of the goldfish by both light and electron microscopy. Intraluminal macrophages exhibited the greatest ACP reactivity that was generally confined to lysosomal bodies containing membranous debris. Quantitative light microscopic evaluation revealed significantly higher ACP reactivity in animals collected at mid-light compared to those collected at mid-dark suggesting that functional activities of macrophages in this photoneuroendocrine organ are cyclical over the 24-h photoperiod. Day-night differences in macrophage ACP activity may reflect rhythmic renewal and shedding of photoreceptor outer segment membranes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0304-3940(88)90198-x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lectin-Mediated Labeling of Alkaline Phosphatase for Enzymatic Silver Deposition-Based Electrochemical Detection of Glycoprotein Tumor Markers.
Anal Chem
January 2025
Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
The screening of glycoprotein markers has become an integral part of the in vitro diagnosis of malignant tumors. Herein, an electrochemical method based on alkaline phosphatase (ALP)-mediated enzymatic silver deposition is reported for the highly sensitive detection of glycoprotein tumor markers, in which ALP enzymes are decorated to the glycan moieties of targets via the lectin-carbohydrate interactions. As glycoproteins are conjugated with multiple glycan chains, lectin-mediated labeling can result in the decoration of each target with multiple ALP enzymes.
View Article and Find Full Text PDF[Effect of osteon-like concentric microgroove structures of different sizes on the osteoclastic differentiation of macrophages].
Zhonghua Kou Qiang Yi Xue Za Zhi
January 2025
Department of Stomatology, Affiliated Hospital of Putian University, Putian 351106, China.
To investigate the effect of the sizes of osteon-like concentric microgroove structures on the osteoclastic differentiation of macrophages on titanium surfaces, and to provide reference for the surface modification of implants. The silicon wafers sputtered with titanium were selected as the control group (smooth surface specimens) and four concentric groups (concentric circles with the maximum diameter of 200 μ m, the minimum diameter of 20 μ m, the spacing of concentric circles of 10 or 30 μm, the width of microgrooves of 10 or 30 μm, and the depth of microgrooves of 5 or 10 μm) specimens (the total sample size in each group was 27). The width of microgrooves of C10-5 and C10-10 groups was 10 μm, the depth was 5 and 10 μm, and the width of microgrooves of C30-5 and C30-10 groups was 30 μ m, the depth was 5 and 10 μ m, respectively.
View Article and Find Full Text PDFEffects of rosemary extract and its residue on production, immune performance, and gut microbiota in geese.
Front Microbiol
January 2025
College of Animal Science and Technology, Southwest University, Chongqing, China.
Introduction: To explore the effects of rosemary extract (RE) and its residue (RR) on the production, immune performance, and gut microbiota of geese.
Methods: We treat 28-day-old Sichuan white geese ( = 180) with three diets: (1) basal diet (control), (2) basal diet supplemented with 0.02% RE, and (3) basal diet supplemented with 15% RR for 42 days.
Enzyme-Instructed Interfacial Jamming of Pillar[5]arenes for Macroscopic Signal Amplification.
Langmuir
January 2025
Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab 140306, India.
Enzyme-instructed signal generation at liquid-liquid interfaces presents a novel strategy for controlling and detecting biochemical processes on macroscopic scales. Here, we explore the self-assembly and jamming of pillar[5]arene (P[5]A) derivatives at the oil-water interface via a copper-mediated "click" reaction, providing a versatile platform for generating observable signals. The formation of a pillar[5]arenes network at the droplet interface reduces interfacial tension, allowing droplets to adopt various nonequilibrium shapes based on the interfacial jamming process.
View Article and Find Full Text PDFMolecular Mechanism and Research Progress of Sphingolipid Metabolism in Regulating Radiation-induced Apoptosis Using Pan-cancer Analysis.
Curr Cancer Drug Targets
January 2025
Department of Radiation Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Radiotherapy stands as a cornerstone in cancer therapy, with nuclear DNA acknowledged as the principal target molecule for radiation-induced cellular demise or injury. Nonetheless, an expanding body of contemporary research elucidates the significant contri-bution of sphingolipids to radiation-induced cell death, particularly in modulating radiation-induced apoptosis. Radiation can instigate apoptosis through multiple pathways of sphin-golipid metabolism, encompassing the activation of ceramide synthase, acid sphingomyelin-ase, neutral sphingomyelinase, sphingosine-1-phosphate lyase, and sphingosine-1-phosphate phosphatase, and the inhibition of sphingosine kinase-1.
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!