Abstract:
:In systemic light-chain amyloidosis, λ light chains produced by clonal plasma cells cause organ damage and early death. In pursuit of novel therapy, we developed 1 pool of short interfering RNA (siRNA) targeting the constant region of λ light chains that substantially and promptly reduces λ-light-chain production and secretion by human plasma cells regardless of sequence diversity. In clones producing intact immunoglobulin G (IgG) λ antibodies (containing paired heavy and light chains), the secretion of intact antibodies is reduced, and all 3 branches of the unfolded protein response are activated by accumulation of unpaired IgG heavy chains in the endoplasmic reticulum (ER). Moreover, an ER stress response can then become terminal with effector caspase activity mediated in part by the transcription of the Bcl-2 homology 3 domain only family member NOXA. This pool of siRNA can be used to reduce pathological λ-light-chain production and cause apoptosis in human plasma cells making intact IgGλ antibodies.
journal_name
Bloodjournal_title
Bloodauthors
Zhou P,Ma X,Iyer L,Chaulagain C,Comenzo RLdoi
10.1182/blood-2013-10-535187subject
Has Abstractpub_date
2014-05-29 00:00:00pages
3440-51issue
22eissn
0006-4971issn
1528-0020pii
blood-2013-10-535187journal_volume
123pub_type
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