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Université de Fribourg

Distal and proximal hypoxia response elements cooperate to regulate organ-specific erythropoietin gene expression

Orlando, Ilaria M. C. ; Lafleur, Véronique N. ; Storti, Federica ; Spielmann, Patrick ; Crowther, Lisa ; Santambrogio, Sara ; Schödel, Johannes ; Hoogewijs, David ; Mole, David R. ; Wenger, Roland H.

In: Haematologica, 2019, vol. 105, no. 12, p. 2774–2784

While it is well-established that distal hypoxia response elements (HREs) regulate hypoxia-inducible factor (HIF) target genes such as erythropoietin (Epo), an interplay between multiple distal and proximal (promoter) HREs has not been described so far. Hepatic Epo expression is regulated by a HRE located downstream of the EPO gene, but this 3' HRE is dispensable for renal EPO gene...

Université de Fribourg

Hypoxia pathway proteins are master regulators of erythropoiesis

Watts, Deepika ; Gaete, Diana ; Rodriguez, Diego ; Hoogewijs, David ; Rauner, Martina ; Sormendi, Sundary ; Wielockx, Ben

In: International Journal of Molecular Sciences, 2020, vol. 21, no. 21, p. 8131

Erythropoiesis is a complex process driving the production of red blood cells. During homeostasis, adult erythropoiesis takes place in the bone marrow and is tightly controlled by erythropoietin (EPO), a central hormone mainly produced in renal EPO- producing cells. The expression of EPO is strictly regulated by local changes in oxygen partial pressure (pO2) as under-deprived oxygen (hypoxia);...

Université de Fribourg

Compartment and cell-type specific hypoxia responses in the developing Drosophila brain

Baccino-Calace, Martin ; Prieto, Daniel ; Cantera, Rafael ; Egger, Boris

In: Biology Open, 2020, vol. 9, no. 8, p. -

Environmental factors such as the availability of oxygen are instructive cues that regulate stem cell maintenance and differentiation. We used a genetically encoded biosensor to monitor the hypoxic state of neural cells in the larval brain of Drosophila. The biosensor reveals brain compartment and cell-type specific levels of hypoxia. The values correlate with differential tracheolation that...

Consortium of Swiss Academic Libraries

Cardiovascular determinants of life span

Shi, Yi ; Camici, Giovanni ; Lüscher, Thomas

In: Pflügers Archiv - European Journal of Physiology, 2010, vol. 459, no. 2, p. 315-324