Article (Scientific journals)
Intrabody targeting HIF-1α mediates transcriptional downregulation of target genes related to solid tumors
Hu, Y.; Romão, E.; Vincke, C. et al.
2021In International Journal of Molecular Sciences, 22 (22), p. 12335
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Keywords :
HIF-1α; Nanobodies; Target genes; Transcriptional activation; HIF1A protein, human; Escherichia coli; HeLa cell line; Cell Hypoxia; Down-Regulation; Female; Gene Expression Regulation, Neoplastic; HeLa Cells; Humans; Hypoxia-Inducible Factor 1, alpha Subunit; Protein Domains; Single-Domain Antibodies; Transcription, Genetic; Transfection; Uterine Cervical Neoplasms
Abstract :
[en] Uncontrolled growth of solid tumors will result in a hallmark hypoxic condition, whereby the key transcriptional regulator of hypoxia inducible factor-1α (HIF-1α) will be stabilized to activate the transcription of target genes that are responsible for the metabolism, proliferation, and metastasis of tumor cells. Targeting and inhibiting the transcriptional activity of HIF-1 may provide an interesting strategy for cancer therapy. In the present study, an immune library and a synthetic library were constructed for the phage display selection of Nbs against recombinant PAS B domain protein (rPasB) of HIF-1α. After panning and screening, seven different nanobodies (Nbs) were selected, of which five were confirmed via immunoprecipitation to target the native HIF-1α subunit. The inhibitory effect of the selected Nbs on HIF-1 induced activation of target genes has been evaluated after intracellular expression of these Nbs in HeLa cells. The dramatic inhibition of both intrabody formats on the expression of HIF-1-related target genes has been confirmed, which indicated the inhibitory efficacy of selected Nbs on the transcriptional activity of HIF-1. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Hu, Y.;  Research Institute of Public Health, School of Medicine, Nankai University, Tianjin, 300071, China, Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium
Romão, E.;  Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium
Vincke, C.;  Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium
Brys, L.;  Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium
Elkrim, Y.;  Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium
Vandevenne, Marylène ;  Université de Liège - ULiège
Liu, C.;  State Key Laboratory of Drug Delivery Technology and Pharmacokinetics, Tianjin Institute of Pharmaceutical Research, Tianjin, 300301, China
Muyldermans, S.;  Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium
Language :
English
Title :
Intrabody targeting HIF-1α mediates transcriptional downregulation of target genes related to solid tumors
Publication date :
2021
Journal title :
International Journal of Molecular Sciences
ISSN :
1661-6596
eISSN :
1422-0067
Publisher :
Multidisciplinary Digital Publishing Institute (MDPI), Switzerland
Volume :
22
Issue :
22
Pages :
12335
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 January 2022

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