Age-Related Lipofuscin Accumulation

Symptom

Exceptionally broad excitation and emission spectra affecting multiple channels in aged tissues such as brain, heart, skeletal muscle, and retina. Age-dependent lysosomal pigment cannot be confined to single channel.

1. 1 Age-dependent accumulation of lipofuscin in lysosomes
2. 2 Broad, overlapping excitation and emission spectra
3. 3 Particularly prominent in metabolically active tissues
4. 4 Increased accumulation in aged specimens

1. 1 Apply Sudan Black B (0.05-0.3% w/v in 70% EtOH for ~10 min) as primary quencher
2. 2 Rinse thoroughly and mount in aqueous medium (SBB is alcohol-soluble)
3. 3 Assign dim targets exclusively to far-red channels
4. 4 Document autofluorescence baseline with no-primary controls in each channel
5. 5 Consider spectral unmixing for mathematical separation of autofluorescence

Related Video (2)

Current Protocols ★ 82

Deciding on an Approach for Mitigating Autofluorescence

"Directly addresses autofluorescence mitigation strategies in multi-channel fluorescence experiments, the core problem in lipofuscin-affected tissue imaging"

Current Protocols ★ 78

Heterogeneous Autofluorescence

"Focuses on heterogeneous autofluorescence as a technical challenge in fluorescence detection, directly relevant to understanding lipofuscin's broad-spectrum interference across channels"