Beyond Gap Junctions: Connexins as Orchestrators of
Tumor–Stroma Communication We are looking for an ambitious
postdoctoral researcher to develop an independent Marie
Skłodowska-Curie Fellowship project at the interface of cancer cell
communication, metabolism, and tumor microenvironment biology.
Marie Skłodowska-Curie Actions – Postdoctoral Fellowships (MSCA-PF)
The Marie Skłodowska-Curie Postdoctoral Fellowships (MSCA-PF) are
part of the Horizon Europe programme and support postdoctoral
researchers in developing an original research and innovation
project through international mobility. The programme aims to
strengthen researchers’ careers through excellent science,
international collaboration and interdisciplinary experience, while
fostering integration in both academic and non-academic
environments. The MSCA-PF call is highly competitive and represents
an excellent opportunity to attract international talent and
support researchers in consolidating their scientific careers
through an ambitious mobility-based fellowship. The 2026 call




closes on 09/09/2026 (17:00 Brussels time). For candidates applying
to a European Postdoctoral Fellowship, the fellowship duration is
from 12 to 24 months . Full eligibility details: MSCA Postdoctoral
Fellowships 2026 Background Connexin 43 (Cx43) presents a
long-standing paradox in cancer: it can act as either a tumour
suppressor or a tumour promoter depending on context. Beyond its
classical role as a gap junction protein, Cx43 regulates tunnelling
nanotube (TNT) formation, mitochondrial transfer, and extracellular
vesicle (EV) signalling. Its alternatively translated isoform
GJA1-20k further controls actin remodelling and mitochondrial
dynamics, suggesting that connexins play a broader role in
coordinating communication between tumour cells and their
microenvironment. This project will test the hypothesis that Cx43
acts as a master regulator of intercellular communication, linking
these pathways to tumour plasticity and therapeut

📌 VHIR-MSCA-.010_Postdoctoral Fellowship (Cataluña)
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