lentivirus vector CCR5 shRNA/TRIM5alpha/TAR decoy-transduced autologous CD34-positive hematopoietic progenitor cells

{
  "id": "MLC-T-ONC-014743",
  "term": "lentivirus vector CCR5 shRNA/TRIM5alpha/TAR decoy-transduced autologous CD34-positive hematopoietic progenitor cells",
  "field": "Oncology and biomedicine",
  "definition": "Autologous, CD34-positive hematopoietic progenitor cells (HPCs) transduced with a lentiviral vector encoding three anti-human immunodeficiency virus (HIV) genes: a short hairpin RNA (shRNA) that targets human chemokine receptor 5 (CCR5), a human/rhesus macaque chimeric tripartite motif-containing protein 5 alpha isoform (TRIM5alpha), and a TAT activation response (TAR) decoy, as well as a pre-selective cell-surface marker, which is a truncated and mutated form of human CD25, used to potentially provide resistance against human immunodeficiency virus (HIV) infection. Human autologous CD34-positive HPCs are isolated and transduced ex vivo with the lentiviral vector. Upon pre-selection, purification using CD25 immunomagnetic separation, and subsequent administration of effectively transduced HPCs, the HPCs display 3 separate mechanisms of action against HIV infection: CCR5 shRNA binds to CCR5 mRNA and inhibits the expression of CCR5, a HIV-1 co-receptor that mediates HIV attachment and host cell entry; TRIM5alpha prevents HIV genome integration upon cell entry; and the TAR decoy binds to the HIV TAT protein and prevents TAT-dependent viral gene transcription, thereby preventing HIV replication. Upon transfer of the lentivirus vector CCR5 shRNA/TRIM5alpha/TAR decoy-transduced autologous CD34-positive HPCs into the patient, the HPCs are resistant to HIV entry and replication and could provide long-term protection against both HIV infection and HIV-associated cancers.",
  "synonyms": [
    "lentivirus vector CCR5 shRNA/TRIM5alpha/TAR decoy-transduced autologous CD34-positive HPCs"
  ],
  "references": [
    "National Cancer Institute Thesaurus"
  ],
  "url": "https://mlchart.com/terminology/oncology/lentivirus-vector-ccr5-shrna-trim5alpha-tar-decoy-transduced-autologous-cd34/"
}