EASTBIO PhD: Ultrafast Imaging and Mechanistic Modelling of Cell Volume Regulation

EASTBIO PhD: Ultrafast Imaging and Mechanistic Modelling of Cell Volume Regulation

Research Question and Fit

What can a change in cell volume reveal about the processes controlling it? This four-year Edinburgh IRR project combines label-free quantitative phase imaging (QPI), biophysical measurements and mechanistic modelling to distinguish contributions that overlap in time. The student’s task is to connect an optical trajectory to a defensible physical explanation, rather than merely establish that cells become larger or smaller. Measurement assumptions and the identifiability of model parameters are therefore central scientific questions.

The project lists Pierre-Olivier Bagnaninchi and C G Hansen and explicitly offers competitive EASTBIO support to UK and international candidates, including Edinburgh's overseas–Home fee difference. The deadline is 16 November 2026, without a stated clock or timezone. Application forms, PDF transcripts and template references go to IRRSchoolPGR@ed.ac.uk, with references due by the same deadline. The principal uncertainties are the precise registration programme, personal 2027 funding terms, technical allocation and how reliably distinct mechanisms can be inferred from images.

Research Problem and Doctoral Work

Cell volume affects molecular concentration, intracellular transport, membrane tension and cytoplasmic mechanics. Several processes act together: osmotic and hydrostatic pressure, water crossing the membrane, redistribution through the cytoplasm and slower active regulation. Conventional measurements can blur these overlapping contributions. The advertised platform operates above 300 frames per second, intended to resolve early responses before slower regulation dominates; this is a platform capability, not proof that every proposed mechanism has already been measured independently.

The work links three activities: obtain quantitative cell-volume trajectories, relate them to a model of coupled water movement and cellular mechanics, and evaluate predictions beyond the observations used for fitting. The model connects transmembrane water movement, poroelastic relaxation, membrane–cortex mechanics and active recovery; individual-cell trajectories are intended to inform quantities such as permeability and regulatory transport strength. Responses to previously unseen pressure waveforms are an advertised test of that explanation. This is a proposed measurement-and-inference framework, not an already validated universal model.

Biological comparisons include HEK293 cells with different YAP/TAZ states, fibroblasts and adipocytes. The scientific aim is to identify which component of volume regulation differs, rather than reporting a change in size alone. The project does not advertise a clinical diagnostic or validated treatment, and broad regeneration relevance should not be presented as demonstrated patient benefit.

A critical analytical issue is the measurement-to-parameter chain. Optical phase depends on optical path length, including refractive-index assumptions, not simply geometric volume. The team's earlier pressure paper calculated volume from segmented area and optical thickness using mean refractive indices. Consequently, changes in cell composition, segmentation and model assumptions require consideration alongside biological effects. Similarly, different combinations of mechanical and transport parameters might explain similar trajectories. Identifiability, uncertainty and prediction on withheld conditions are substantive thesis questions, not merely software fitting tasks.

A useful first-year milestone would therefore be an agreed, reproducible measurement-and-inference benchmark with clear limits. This is an analytical suggestion, not an additional advertised work package or experimental recipe. Existing calibration data, feasible model complexity, access to the platform and the division between experiment and computation need confirmation.

School, Programme and Field Context

The University of Edinburgh is the degree-awarding institution; the scientific host is IRR within the School of Regeneration and Repair, College of Medicine and Veterinary Medicine. Bagnaninchi is associated with the Centre for Regenerative Medicine, and Hansen with the Centre for Inflammation Research. Their collaboration does not imply separate degrees or employment at two institutions.

IRR's official doctoral pages describe specialist facility staff, laboratory and research training, seminars, journal clubs and a BioQuarter research community. These are stronger training signals for this project than an overall league-table position alone. Edinburgh is 35th in QS 2027 overall and reports fourth in UK REF 2021 research power; neither statistic ranks this lab or establishes a project-specific placement advantage. A current, directly comparable IRR subject ranking was not established.

The relevant Regenerative Medicine PhD 2027 course provides an official IRR admissions reference, but the exact programme assignment for this EASTBIO candidate is not stated in the advertisement. Its ordinary full-time listing is three years, whereas this project explicitly has a four-year EASTBIO framework. Confirm the registration code and funded progression arrangements rather than shortening the project or substituting the Biological Sciences with Internship course.

EastBio's revised training structure emphasises core research and professional skills in years one and two and research in later years, alongside placement development. Its published 2026/27 events concern existing students and are not a fixed timetable for a 2027 entrant. IRR provides an interdisciplinary setting; adjacent clinical and biotechnology facilities do not automatically grant personal access, professional clinical accreditation or employment.

Supervisor and Lab Assessment

Pierre-Olivier Bagnaninchi and Carsten Gram Hansen are currently Readers. Bagnaninchi's official biography connects theoretical physics and biomedical engineering with label-free measurements of cell and tissue properties. Hansen's current CIR profile centres on Hippo signalling, mechanical sensing, cell growth and repair. The combination is directly relevant to measurement and biological interpretation. A principal/co-supervisor allocation, meeting frequency, day-to-day technical mentor and modelling support have not been specified.

Their joint QPI elastography grant ran from August 2024 to January 2026. A related commercial-translation project runs 1 September 2026–31 August 2028. These show active platform development, not a separate personal studentship or guaranteed resources throughout a four-year doctorate. Ask which instruments, software, specialist time and continuity arrangements are actually allocated.

Cell mechanics and pressure responses: Park et al., 2022

EMBO Journal, DOI 10.15252/embj.2021108719. Both supervisors coauthored this directly relevant original. Quantitative holographic measurements linked YAP/TAZ to cell size, membrane tension and pressure responses, with steady-state regulation differing from dynamic response. Its volume conversion uses refractive-index assumptions. The paper studies HEK293A among its models; the new advertisement says HEK293. It establishes prior experimental competence, not the new ultrafast platform's parameter identifiability or a completed universal hydraulic model.

Generative imaging and reconstruction limits: Liu et al., 2025

Cell Reports Physical Science, DOI 10.1016/j.xcrp.2025.102792. Both supervisors are coauthors; Yang is corresponding author. The cited author version presents GenLFI as combining holographic imaging with physics-informed generative reconstruction, including comparisons and ablation tests; it identifies low-contrast, shadow and generalisation limits. Reconstructing two-dimensional images of three-dimensional samples is not automatically quantitative three-dimensional cell-volume measurement. This is related imaging competence, not validation of the advertised pressure–water-flux model. The cited author version provides contextual imaging evidence, not validation of the project’s pressure–water-flux model.

Comparative phenotyping: Cunningham et al., 2025

Life Science Alliance, DOI 10.26508/lsa.202503241. Both supervisors coauthored this original, with Hansen corresponding. Comparative phenotyping, compensation and off-target analysis illustrate why biological interpretation needs controls. The mesothelioma profiling application is adjacent to this project, not evidence that its water-transport mechanisms or clinical efficacy are established.

The three recent team originals concern pressure response, image reconstruction and YAP–TEAD phenotyping; none establishes this project’s water-transport mechanism or clinical efficacy. They do not guarantee a company placement.

Funding, Application, and Living Cost

The exact advertisement provides stronger evidence than a worldwide label: successful international appointees receive stipend and Home-level tuition support, with Edinburgh covering the international fee difference. EastBio's general FAQ specifies a 30% international annual-intake cap; the advertisement itself does not give a ratio. This is a network constraint, not the probability of funding this candidate or a reserved international place on this project.

The framework is four years, with research and training support distinct from personal maintenance. £21,805 is the UKRI 2026/27 reference, not a confirmed 2027/28 personal rate. Confirm paid dates, stipend, research allocation and any completion period before accepting. The ordinary IRR course mentions possible additional research costs of £5,000–£30,000 annually across projects; this is a generic range, not a bill for this studentship. Ask whether all necessary facility, consumable and computing costs are covered rather than adding that range to personal debt automatically.

For this project, email the completed EASTBIO form and PDF academic transcripts to IRRSchoolPGR@ed.ac.uk. Referees must use the EASTBIO reference template and send it to the same address by 16 November 2026. Do not use another School's Euclid-only instructions or assume a two-week reference extension. General EastBio guidance requires one project application across the partnership, two academic or professional references excluding the proposed supervisors, and the anonymous EDI survey response ID on the form. Extra CVs are disregarded under its FAQ. Prepare the current 2027 forms and confirm the cutoff clock/timezone.

Selection includes host assessment, supervisor nomination and panel interview; initial interest does not secure funding. The general timeline anticipates interview invitations around 22 February 2027, interviews in the week beginning 8 March and decisions in the week beginning 22 March. The October 2027 cohort is not a confirmed individual start date.

Edinburgh's 2026/27 living estimate is £18,504 yearly/£1,542 monthly, excluding tuition. Compared with the dated stipend reference, £3,301 remains arithmetically before exceptional and immigration expenses; this is not a forecast surplus. BioQuarter commuting, lease length, bills, deposits and relocation should be priced separately. The Student visa application fee is £558 and the IHS is £776 per visa year. EastBio excludes visa/IHS; visa validity may exceed course length, and future charges can change.

Applicant Fit and Preparation

This is an experimentally grounded biophysics project with substantial inference work. Prior quantitative imaging, physical modelling or biological research would be useful preparation, but the advertisement does not make mastery of every method a prerequisite. The relevant IRR Regenerative Medicine course asks for a biological/biomedical UK 2:1 or equivalent, or a medical/veterinary degree. A physics or engineering applicant should request individual subject-fit assessment rather than assuming an interdisciplinary project waives the formal programme condition.

The current China selector explicitly accepts degrees from recognised Chinese universities or its Priority List. It says a PhD master's is needed only where the programme's Qualifications section specifies one; the relevant course does not list a mandatory master's. The accompanying 80%/80–85% table explicitly concerns taught programmes and two named MScR courses, so it must not become a numerical PhD cutoff. This recognised-degree route, explicit international funding and sponsored Student visa route establish a positive conditional Chinese pathway, subject to actual degree assessment and admission.

The reviewed 2027 IRR course specifies IELTS Academic 6.5 overall, each component 6.0, without One Skill Retake. TOEFL before 21 January 2026 requires 92 overall/23 each; from that date it requires 4.5 overall/4.5 each, with no MyBest. Relevant tests must be within two years of the first day of the starting month. English-degree alternatives have approved-country/university and age conditions; Chinese English-medium study is not an automatic waiver. Confirm these conditions against the final registration programme and any evidence deadline. EastBio permits initial applications without a completed English test in principle, but the host may require evidence before a formal offer.

ATAS depends on the actual offer/research classification; no personal CAH decision has been issued. China's absence from the nationality-exemption list is not a nationality ban. Admission, CAS, English, finance and any required clearance remain individual conditions.

Career Relevance

Imaging, model validation, uncertainty analysis and scientific communication are transferable skills, but verified project-level graduate salaries and placement rates are unavailable. Research, analytical imaging and scientific-computing work are possible directions to discuss with the university careers service, not a promised role or clinical qualification. Career context

Next Actions and Questions to Verify

Before applying, confirm the registration programme, qualification/English assessment and email cutoff, contact the supervisors about scientific fit, and arrange the mandatory form, transcripts, EDI and two template references. Complete references by the project's main deadline.

At interview, ask how the supervisors divide modelling and imaging support, what data and instruments are available, and how optical assumptions and parameter ambiguity will be handled. Discuss a feasible first-year benchmark and which advertised biological comparisons are established.

Before accepting, establish full overseas fees, personal stipend and paid months, research/facility/placement resources, registration progression, completion support and actual housing/visa costs. These uncertainties do not require an award letter before making an initial application.

Evidence and Sources

The three papers provide distinct evidence on pressure response, image reconstruction and related phenotyping; they do not establish this project’s water-transport mechanism or clinical efficacy. The deadline is 16 November 2026; the closing time, time zone and current application status are unconfirmed.

Project, institution and original research

• S02 — Pierre-Olivier Bagnaninchi official profile and Edinburgh address
• S03 — Carsten Gram Hansen official CIR research group and Reader role
• S04 — IRR doctoral training and hosted programme routes
• S05 — Regenerative Medicine 2027 IRR programme, China and English — relevant route comparator
• S06 — Bagnaninchi current Reader, publications and QPIE project history
• S07 — QPI elastography commercial-translation grant dates
• S08 — Park et al. 2022 hydrostatic-pressure response original — published institutional PDF
• S09 — Liu et al. 2025 GenLFI original, institutional record and author manuscript
• S10 — Cunningham et al. 2025 YAP-TEAD profiling original — original abstract scope

Admissions, funding and training

• S11 — EastBio how to apply 2027
• S12 — EastBio international eligibility and award FAQ
• S13 — EastBio selection process and recruitment timeline
• S14 — EastBio training overview
• S15 — Edinburgh current general English degree and joint-China exceptions
• S16 — Edinburgh approved non-MESC English-degree universities

Costs, context, mobility and career

• S17 — Edinburgh postgraduate living budget 2026–27
• S18 — Edinburgh institutional QS 2027 / REF 2021 summary
• S19 — UKRI current stipend/fee rates
• S20 — UK Student visa sponsored study route
• S21 — Student immigration health surcharge
• S22 — ATAS nationalities and course classification
• S23 — Royal Society Biology careers resources
• S24 — EastBio 2027 recruitment landing