CCL

Összesen 1 találat.
#/oldal:
Részletezés:
Rendezés:

1.

001-es BibID:BIBFORM107302
035-os BibID:(scopus)85141712265 (wos)000882982200001
Első szerző:Reddiar, Sanjeevini Babu
Cím:A Biodistribution Study of the Radiolabeled Kv1.3-Blocking Peptide DOTA-HsTX1[R14A] Demonstrates Brain Uptake in a Mouse Model of Neuroinflammation / Reddiar Sanjeevini Babu, de Veer Michael, Paterson Brett M., Sepehrizadeh Tara, Wai Dorothy C. C., Csoti Agota, Panyi Gyorgy, Nicolazzo Joseph A., Norton Raymond S.
Dátum:2023
ISSN:1543-8384 1543-8392
Megjegyzések:The voltage-gated potassium channel Kv1.3 regulates the pro-inflammatory function of microglia and is highly expressed in the post-mortem brains of individuals with Alzheimer's and Parkinson's diseases. HsTX1[R14A] is a selective and potent peptide inhibitor of the Kv1.3 channel (IC50 ? 45 pM) that has been shown to decrease cytokine levels in a lipopolysaccharide (LPS)-induced mouse model of inflammation. Central nervous system exposure to HsTX1[R14A] was previously detected in this mouse model using liquid chromatography with tandem mass spectrometry, but this technique does not report on the spatial distribution of the peptide in the different brain regions or peripheral organs. Herein, the in vivo distribution of a [64Cu]Cu-labeled DOTA conjugate of HsTX1[R14A] was observed for up to 48 h by positron emission tomography (PET) in mice. After subcutaneous administration to untreated C57BL/6J mice, considerable uptake of the radiolabeled peptide was observed in the kidney, but it was undetectable in the brain. Biodistribution of a [68Ga]Ga-DOTA conjugate of HsTX1[R14A] was then investigated in the LPS-induced mouse model of neuroinflammation to assess the effects of inflammation on uptake of the peptide in the brain. A control peptide with very weak Kv1.3 binding, [68Ga]Ga-DOTA-HsTX1[R14A,Y21A,K23A] (IC50 ? 6 ?M), was also tested. Significantly increased uptake of [68Ga]Ga-DOTA-HsTX1[R14A] was observed in the brains of LPS-treated mice compared to mice treated with control peptide, implying that the enhanced uptake was due to increased Kv1.3 expression rather than simply increased blood?brain barrier disruption. PET imaging also showed accumulation of [68Ga]Ga-DOTA-HsTX1[R14A] in inflamed joints and decreased clearance from the kidneys in LPS-treated mice. These biodistribution data highlight the potential of HsTX1[R14A] as a therapeutic for the treatment of neuroinflammatory diseases mediated by overexpression of Kv1.3.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Biodistribution
Central nervous system
Inflammation
Peptides and proteins
Rodent models
Megjelenés:Molecular Pharmaceutics. - 20 : 1 (2023), p. 255-266. -
További szerzők:de Veer, Michael Paterson, Brett M. Sepehrizadeh, Tara Wai, Dorothy C. C. Csóti Ágota (1989-) (biológus) Panyi György (1966-) (biofizikus) Nicolazzo, Joseph A. Norton, Raymond S.
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Rekordok letöltése1