PMID- 24692492 OWN - NLM STAT- MEDLINE DCOM- 20141114 LR - 20140402 IS - 1559-6095 (Electronic) IS - 1559-6095 (Linking) VI - 2014 IP - 4 DP - 2014 Apr 1 TI - Fluorescent visualization of germline apoptosis in living Caenorhabditis elegans. PG - 420-7 LID - 10.1101/pdb.prot080226 [doi] AB - Visualization of apoptosis using fluorescent tools is quite straightforward in living Caenorhabditis elegans. Several transgenic lines are available that mark dying cells with fluorescent proteins, making it possible to quantify kinetics at various stages of the apoptotic process. Proteins required for the engulfment of cell corpses are particularly useful for detecting early apoptotic stages using this approach. For example, expression of the engulfment protein CED-1 fused to green fluorescent protein (CED-1::GFP) creates a halo around cells during early apoptosis, before their refractile morphology can be detected by differential interference contrast (DIC) optics. In addition, vital dyes such as acridine orange (AO) and SYTO-12 are selectively retained in apoptotic cells and can be used to visualize apoptosis in the germlines of living animals. It is also possible to use vital dyes in combination with transgenic strains expressing fluorescent markers of cell corpses to examine, in detail, multiple stages of apoptosis in vivo. Because of the high optical contrast of fluorescent reagents, apoptosis can be visualized even at low magnification, facilitating the use of screening platforms to identify apoptosis regulators. This protocol describes multiple uses of fluorescent reagents for visualization of germline apoptosis in living C. elegans, including AO staining, time-course studies using fluorescent proteins, and low-throughput screening of cell death genes using RNA interference (RNAi). FAU - Lant, Benjamin AU - Lant B AD - Developmental and Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario M5G 1L7, Canada; FAU - Derry, W Brent AU - Derry WB LA - eng PT - Journal Article DEP - 20140401 PL - United States TA - Cold Spring Harb Protoc JT - Cold Spring Harbor protocols JID - 101524530 RN - 0 (Fluorescent Dyes) RN - 0 (Luminescent Proteins) SB - IM MH - Animals MH - *Apoptosis MH - Caenorhabditis elegans/*physiology MH - Fluorescent Dyes/*analysis MH - Germ Cells/*physiology MH - Luminescent Proteins/*analysis MH - Optical Imaging/*methods MH - Staining and Labeling/*methods EDAT- 2014/04/03 06:00 MHDA- 2014/11/15 06:00 CRDT- 2014/04/03 06:00 PHST- 2014/04/03 06:00 [entrez] PHST- 2014/04/03 06:00 [pubmed] PHST- 2014/11/15 06:00 [medline] AID - 2014/4/pdb.prot080226 [pii] AID - 10.1101/pdb.prot080226 [doi] PST - epublish SO - Cold Spring Harb Protoc. 2014 Apr 1;2014(4):420-7. doi: 10.1101/pdb.prot080226.