CIL:38592, Rattus rattus, glandular epithelial cell, milk secreting cell, mammary alveolar cell. In Cell Image Library ...

• Main Authors: Ladinsky, Mark, Howell, Kathryn E.
• Format: Dataset
• Language: unknown
• Published: UC San Diego Library Digital Collections 2021
• Subjects: protein binding; mammary alveolar cell; glandular epithelial cell; lactation; Mitochondrion; Rattus rattus; smooth endoplasmic reticulum; milk secreting cell; secretion; trans-Golgi network; lipid storage; lipid particle
• Online Access: https://dx.doi.org/10.6075/j0w66k4p; https://library.ucsd.edu/dc/object/bb81985453

Immunoelectron microscopy of mammary gland tissue from lactating rats investigating potential structural interactions between mature lipid droplets, as indicated by peripheral labeling with adipophilin (smaller gold particles) and elements of the trans-Golgi network, identified by TGN38 (a transmembrane trans-Golgi protein) staining (larger gold particles). Note that trans‚ÄêGolgi cisternae in lactating mammary cells contain large amounts of casein and other milk proteins and are grossly expanded due to the osmolarity of the secreted fluid. ... : Tissue was processed for immunoelectron microscopy using a modified Tokuyasu method. Briefly, minced tissue was fixed in 4% paraformaldehyde containing 5% sucrose and 100 mM HEPES and infiltrated with PBS containing 2.1 M sucrose over 10 h, with repeated solution changes. Fixed tissue was transferred to an aluminum cryosectioning stub (Ted Pella, Inc., Redding, CA) and immediately frozen in liquid nitrogen. Semithin (90 nm) cryosections were cut at -110C with an UltraCut UCT/FCS cryomicrotome (Leica), using a diamond knife (Diatome) and transferred to a Formvar-coated, carbon-coated, glow-discharged 100-mesh copper-rhodium electron microscopy grid. Following blocking of nonspecific antibody binding sites with 10% calf serum in PBS, the sections were labeled by sequential incubation with antibodies to adipophilin (guinea pig anti-adipophilin) and TGN38 (mouse monoclonal 2F7) and colloidal gold-conjugated secondary antibodies (15 nm anti-mouse, 10 nm anti-guinea pig; Ted Pella Inc., Redding, CA) and then ...