Journal: Life Science Alliance

Article Title: Local tissue mechanics control cardiac pacemaker cell embryonic patterning

doi: 10.26508/lsa.202201799

Figure Lengend Snippet: (A) Col3A1 staining at the SAN/atria junction in representative HH18, HH30, and HH35 hearts. (B) Distribution of Col3A1, TnC, and WFA in the H35 SAN and atria. (C) Diagram of in vivo transfection strategy for mosaic calcium imaging in the intact SAN. Integrating DNA plasmids were microinjected into the pericardial space adjacent to the forming SAN at HH18 and SAN tissue was isolated for live imaging at HH30. (D) Live imaging of a memRFP/GCaMP6f-positive cell within the SAN. Data presented in were taken from cells imaged in 25 individual hearts.

Article Snippet: The following reagents were used for immunohistochemistry: MF20 (14650380; Invitrogen) (1:500); FLRT3 (PA563240; Invitrogen) (1:250); hyaluronic acid binding protein, bovine nasal cartilage, biotinylated (38591150UG; MilliporeSigma) (1:100); Wisteria floribunda lectin biotinylated (B13552; Vector Laboratories) (1:100); Col3A1 (3B2-s; DSHB) (1:250), TNC (LS-C39574-50; LSBio) (1:500); Nav1.5 (LS-C30483; LSBio) (1:500), phalloidin-647 (A22287; Invitrogen) (1:40); NCX1 (LS-C73201-100; LSBio) (1:500); streptavidin-568 (S11226; Invitrogen) (1:500); DAPI (62248; Thermo Fisher Scientific) (1:1,000); IgM (heavy chain) cross-adsorbed goat anti-mouse, Alexa Fluor 555 (A21426; Invitrogen) (1:500); IgG1 cross-adsorbed goat anti-mouse, Alexa Fluor 647 (A21240; Invitrogen) (1:500); IgG2b cross-adsorbed goat anti-mouse, Alexa Fluor 488 (A21141; Invitrogen) (1:500); IgG (H+L) cross-adsorbed goat anti-rabbit, Alexa Fluor 568 (A11011; Invitrogen) (1:500); goat anti-mouse IgG2b cross-adsorbed secondary antibody, Alexa Fluor 647 (A21242; Invitrogen) (1:500); goat anti-rabbit IgG (H+L) cross-adsorbed secondary antibody, Alexa Fluor 488 (A11008; Invitrogen) (1:500); goat anti-mouse IgM mu chain Alexa Fluor 488 (ab150121; Abcam) (1:500).

Techniques: Staining, In Vivo, Transfection, Imaging, Isolation