1. Can you please briefly summarize the paper? 

Our paper reports a human Gut-Brain-Vascular microphysiological platform that recreates bidirectional gut and brain communication through a perfused vascular channel. Using this platform, we demonstrate that gut-originating microbial/toxic and inflammatory cues can traverse vascular and barrier interfaces to impact brain-relevant endpoints, while brain-side neuroinflammatory/neurodegenerative conditions can, in turn, damage vascular integrity and gut barrier function. Functionally, the model captures a feedback loop in which vascular dysfunction acts as a conduit linking gut and brain pathology. Overall, the platform provides a human-relevant experimental framework for studying gut-brain axis mechanisms and for evaluating therapeutics that aim to break this cycle.

2. Can you please tell us the main difficulties you had in the laboratory work and how you overcame them?

Honestly, the biggest challenge was that the early builds failed a lot, mostly because a tri-compartment, perfused system is unforgiving. Early on, we observed frequent failures due to leaks, bubble events, and variability in gut and endothelial coverage, which quickly destabilized TEER/permeability readouts and downstream inflammation markers. We overcame this by standardizing the assembly workflow (surface treatment, bonding, and leak testing), implementing bubble management and priming protocols, and using QC gates before starting experiments, such as acceptance criteria for baseline permeability/TEER, endothelial confluence, and flow stability. We also refined the cell-seeding order, ECM formulation, and maturation timing so that each compartment reached a stable phenotype before coupling them. Once those controls were in place, success rates and reproducibility improved dramatically, enabling consistent bidirectional challenge studies.

3. Please introduce your laboratory, university or organization to bio-researchers in Korea.

I'm with the MiniBrain Lab at Sungkyunkwan University (SKKU), Korea, led by Prof. Hansang Cho within the Institute of Quantum Biophysics. Our lab develops human minibrain microphysiological systems, microfluidic chip platforms that integrate neuronal/glial circuits, the blood-brain barrier, cerebrovascular function, and gut-brain axis components under perfusion. We use these human-relevant models to study neurodegeneration, dementia, aging, and neuromodulation, and we're also exploring quantum-biology-inspired questions in brain signaling. We actively welcome collaborations with researchers working on mechanisms, biomarkers, and therapeutic testing in CNS and multi-organ axis biology.
Lab website: https://www.minibrainlab.com/MBL_Home

4. Please tell us your experiences and your thoughts related to research activities abroad.

As a Vietnamese researcher studying in Korea, my overseas research experience has been very valuable because it exposed me to a more structured, international research environment and helped me grow quickly. I learned not only advanced experimental techniques, but also stronger habits around reproducibility, such as clear SOPs, QC checkpoints, and rigorous data documentation, especially important for complex microphysiological systems. Working in a multicultural setting also improved my scientific communication and collaboration skills, from presenting results to aligning expectations across different backgrounds. Of course, adapting to a new language and lab culture was challenging at first, but I overcame it by communicating proactively, writing things down clearly, and learning through regular feedback. Overall, studying and doing research in Korea broadened my perspective and strengthened both my technical and professional research skills.

5. Can you provide some advice for younger scientists who have plans to study abroad?

If you're planning to study abroad, treat it like both a research project and a life transition. Choose a lab where the mentorship style and research culture fit you, not just the topic, and contact current trainees to understand expectations and support. Before you arrive, build a strong foundation in the lab's core methods, keep your CV and key documents ready, and set clear goals for your first 3-6 months to ramp up quickly. Once you start, invest early in communication: ask questions, write things down, share regular updates, and don't be afraid to request feedback. Also, prioritize reproducibility habits such as taking good notes, using version control for analysis, and setting up checkpoints, because these skills transfer to any setting. Finally, take care of practical life skills (housing, budgeting, language basics) and build a community, because stability outside the lab directly improves performance inside it.

6. Future plan?

My plan is to continue advancing my research in human-relevant microphysiological systems, especially Organ-Brain interaction and brain-on-a-chip models, by strengthening mechanistic studies, improving standardization and reproducibility, and expanding collaborations to translate these platforms into practical tools for disease modeling and therapeutic testing.

7. Do you have anything else that you would like to tell Korean scientists and students?

To Korean scientists and students, I just want to say: research is a long journey with many setbacks, but those setbacks are part of the process: Never give up, keep your curiosity and integrity, and continue moving forward step by step.