RyR-1 Lentiviral Activation Particles (h): sc-401470-LAC

RYR1 encodes the ryanodine receptor 1 (RyR-1), a large Ca²⁺-release channel embedded in the sarcoplasmic/endoplasmic reticulum that couples membrane depolarization to intracellular Ca²⁺ flux. By controlling rapid calcium-induced calcium release and excitation–contraction coupling, RyR-1 coordinates downstream Ca²⁺-dependent signaling that influences metabolism, mitochondrial function, and activity-dependent transcription programs. Dysregulated RYR1 function or expression perturbs calcium homeostasis and is linked to skeletal muscle pathophysiology, making it a central node for studying Ca²⁺ signaling networks in human myocytes and engineered muscle models. Experimental modulation of RYR1 is commonly used to interrogate channel gating, Ca²⁺ store dynamics, and pathway cross-talk with stress responses such as ER/SR proteostasis.

RyR-1 Lentiviral Activation Particles (h) address this need by packaging the complete synergistic activation mediator (SAM) transcriptional activation system into transduction-ready, high-titer lentiviral particles, enabling efficient RYR1 upregulation across a broader range of human cell types.

RyR-1 Lentiviral Activation Particles (h) deliver all functional components of the synergistic activation mediator (SAM) system via lentiviral transduction. The system comprises three particle preparations co-transduced into target cells: one encoding catalytically inactive dCas9 (D10A and N863A mutations) fused to the VP64 transactivation domain with a blasticidin resistance gene; one encoding the MS2-p65-HSF1 fusion protein with a hygromycin resistance gene; and one encoding a target-specific 20 nt sgRNA fused to two MS2 RNA aptamers with a puromycin resistance gene. Following lentiviral transduction and genomic integration of the expression cassettes, the SAM components are stably expressed and assemble at the target locus within the proximal promoter region upstream of the RYR1 transcriptional start site, where VP64, p65, and HSF1 act cooperatively to recruit endogenous transcriptional machinery and drive sustained upregulation of endogenous RyR-1 expression. The use of nuclease-inactive dCas9 avoids the introduction of double-strand DNA breaks and preserves the native RYR1 genomic locus and regulatory architecture.

The lentiviral format offers several practical advantages: stable genomic integration supports heritable activation across cell divisions; high-titer particle preparations eliminate the need for in-house viral production; and compatibility with primary, non-dividing, and transfection-resistant cell types expands experimental accessibility. Successful transduction can be confirmed and enriched through triple antibiotic selection using puromycin, hygromycin, and blasticidin.

For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.