Cell Engineering

Stiel Lab

Imaging is our window into the processes of life – we bioengineer genetically encoded protein-based tools for optical imaging such as optoacoustics and super resolution microscopy.

Go to Prof. Dr. André C. Stiel

Stiel Lab

Imaging is our window into the processes of life – we bioengineer genetically encoded protein-based tools for optical imaging such as optoacoustics and super resolution microscopy.

Go to Prof. Dr. André C. Stiel

Portrait Andre Stiel

About our research group

The Cell Engineering group is devoted to the development of novel reporters and sensors for Optoacoustic (OA) imaging and other innovative imaging methods like super-resolution fluorescence microscopy. Our main focus is on genetically encoded contrast agents since only such agents allow longitudinal and unperturbed imaging in research animal to truly understand biology and diseases contexts.

To develop novel genetically encoded tools we use molecular engineering concepts that incorporate knowledge from photo-physical studies, protein structures and computational protein design and combine those insights with efficient screening concepts to identify novel reporters or sensors for the next pressing questions in whole animal imaging.

Science - Bioengineering

Bioengineering is an umbrella term encompassing work from numerous different disciplines and topics. For us bioengineering is engineering proteins (protein engineering). That means tapping into the most versatile ...

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Photo-switchable proteins

Photo-switchable proteins are a special class of chromophore bearing proteins prominently found among the green fluorescent protein (GFP)-like ...

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Photoswitching sensors

While switchable reporters are nowadays common in fluorescence super-resolution microscopy and we strive to achieve the same for optoacoustic imaging, the concept of photoswitching – and thus the imaging possibilities – have yet to be translated ...

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Conventional chromophore bearing proteins

Optoacoustic labels require a strong signal in the near-infrared region to allow detection among the strong signals from tissue. For situation where no concepts like photo-switchable proteins (see above) can be used we are screening ...

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Technological developments

Besides our strong research in protein engineering, we also engage in the development of infrastructure for optoacoustic spectroscopy and screening. For example, we developed ...

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Fields of Work and Expertise

Label and Sensor EngineeringFunctional Understanding (Structural and Photophysically)Highthroughput Screening Techniques for Directed Evolution

Our Researchers

Prof. Dr. André C. Stiel
Prof. Dr. André C. Stiel

Group Leader Cell Engineering

Building 57 | room 009

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Anna Dachs

Ph.D. Student

Building 56 / 053

Yishu Huang_frei
Dr. Yishu Huang

Ph.D. Student

Building 57/ room 014

Huma Khatoon

Ph.D. Student

Building 57/ room 014

Alishbah Maqsood

Ph.D. Student

Building 57/ room 014

Kenana Muaiad Al Adem
Dr. Kenana Muaiad Al Adem

Postdoc

Building 57/ room 014

Porträt Mohammed Azeem_bearbeitet
Azeem Mohammed

Ph.D. Student

Building 56/ room 053

Elsa Rodrigues

Ph.D. Student

Building 57/ room 014

Selina Schulz

Technician

Building 57 / room 017

David Wiesner
Dr. David Wiesner

Postdoc

Building 57 / room 014

Looking for a new challenge?

We are constantly looking for motivated Interns, Bachelor and Master students with a passion for science. Preferably, with an understanding and interest for protein engineering, “colorful” proteins and imaging but we are also open for talents from oth

Publications

Opt. Express. 33, 32943-32954 (2025)

Englert, L. ; Perleberg, B. ; Tayal, S. ; Wang, B. ; Huang, Y. ; Azeem, M. ; He, H. ; Stiel, A.-C. ; Ntziachristos, V.

Assessment of performance characteristics of photoswitchable bacteriophytochromes at different depths using optoacoustic mesoscopy.
Photochem. Photobiol., DOI: 10.1111/php.70011 (2025)

Menchicchi, B. ; Stiel, A.-C. ; Nieddu, M. ; Fuenzalida-Werner, J.P.

Fluorescent proteins: A journey from the cell to extreme environments in material science.
J. Eur. Acad. Dermatol. Venereol., DOI: 10.1111/jdv.20811 (2025)

Aguirre Bueno, J. ; Gasteiger, C. ; Hindelang, B. ; Seeger, M. ; Berezhnoi, A. ; Weidenfeld, I. ; Darsow, U. ; Stiel, A.-C. ; Steimle-Grauer, S.A. ; Posch, C. ; Biedermann, T. ; Ntziachristos, V.

Non-invasive characterization of melanoma depth at single-cell resolution.
Acta Biomater. 195, 536-546 (2025)

Huang, Y. ; Stankevych, M. ; Gujrati, V. ; Klemm, U. ; Mohammed, A. ; Wiesner, D. ; Saccomano, M. ; Tost, M. ; Feuchtinger, A. ; Mishra, K. ; Bruns, O.T. ; Geerlof, A. ; Ntziachristos, V. ; Stiel, A.-C.

Photoswitching protein-XTEN fusions as injectable optoacoustic probes.
ACS Appl. Mater. Interfaces 17, 14903-14911 (2025)

Göllner, S. ; Colditz, M. ; Huang, Y. ; Schmidt, H. ; Winkler, A.S. ; Stiel, A.-C.

Chip-based optoacoustic single cell detection in flow using point-source optimized surface acoustic wave transducers.
Opt. Express. 33, 6216-6227 (2025)

Liu, Y. ; Chuah, J. ; Huang, Y. ; Stiel, A.-C. ; Unser, M. ; Dong, J.

Model-based temporal unmixing towards quantitative photo-switching optoacoustic tomography.
Nat. Methods 21, 1996-2007 (2024)

Stiel, A.-C. ; Ntziachristos, V.

Controlling the sound of light: photoswitching optoacoustic imaging.
Photoacoustics 38:100628 (2024)

Huang, S. ; He, H. ; Tom, R.Z. ; Glasl, S. ; Anzenhofer,P. ; Stiel, A.-C. ; Hofmann, S.M. ; Ntziachristos, V.

Non-invasive optoacoustic imaging of dermal microcirculatory revascularization in diet-induced obese mice undergoing exercise intervention.
Adv. Func. Mat., DOI: 10.1002/adfm.202301820 (2023)

Hasler, M. ; Patrian, M. ; Banda-Vázquez, J.A. ; Ferrara, S. ; Stiel, A.-C. ; Fuenzalida-Werner, J.P. ; Costa, R.D.

Fully biogenic near-infrared phosphors: Phycobiliproteins and  cellulose at force toward highly efficient and stable bio-hybrid light-emitting diodes.
Cancer Nanotechnol. 14:36 (2023)

Liu, N. ; Gujrati, V. ; Fuenzalida Werner, J.P. ; Mishra, K. ; Anzenhofer,P. ; Stiel, A.-C. ; Mettenleiter, G. ; Feuchtinger, A. ; Walch, A.K. ; Ntziachristos, V.

Bacterial outer membrane vesicles as cationic dye carriers for optoacoustics-guided phototherapy of cancer.
BioSpektrum 28, 711-715 (2022)

Göllner, S. ; Mishra, K. ; Stiel, A.-C.

Schallschalter: Photoschaltbare Reporter und Sensoren in der Optoakustik.
Adv. Drug Deliv. Rev. 189:114506 (2022)

Liu, N. ; Mishra, K. ; Stiel, A.-C. ; Gujrati, V. ; Ntziachristos, V.

The sound of drug delivery: Optoacoustic imaging in pharmacology.
Photoacoustics 25:100301 (2022)

Fuenzalida Werner, J.P. ; Mishra, K. ; Stankevych, M. ; Klemm, U. ; Ntziachristos, V. ; Stiel, A.-C.

Alginate beads as a highly versatile test-sample for optoacoustic imaging.
Sci. Rep. 11:24430 (2021)

Yun, M. ; You, S.H. ; Nguyen, V.H. ; Prakash, J. ; Glasl, S. ; Gujrati, V. ; Choy, H.E. ; Stiel, A.-C. ; Min, J.J. ; Ntziachristos, V.

Reporter gene-based optoacoustic imaging of E. coli targeted colon cancer in vivo.
Nat. Biotechnol., DOI: 10.1038/s41587-021-01100-5 (2021)

Mishra, K. ; Fuenzalida Werner, J.P. ; Pennacchietti, F. ; Janowski, R. ; Chmyrov, A. ; Huang, Y. ; Zakian Dominguez, C.M. ; Klemm, U. ; Testa, I. ; Niessing, D. ; Ntziachristos, V. ; Stiel, A.-C.

Genetically encoded photo-switchable molecular sensors for optoacoustic and super-resolution imaging.
Methods Enzymol. 657, 365-383 (2021)

Stankevych, M. ; Mishra, K. ; Ntziachristos, V. ; Stiel, A.-C.

A practical guide to photoswitching optoacoustics tomography.
Photoacoustics 22:100263 (2021)

Liu, N. ; Gujrati, V. ; Malekzadeh-Najafabadi, J. ; Werner, J.P,F. ; Klemm, U. ; Tang, L. ; Chen, Z. ; Prakash, J. ; Huang, Y. ; Stiel, A.-C. ; Mettenleiter, G. ; Aichler, M. ; Blutke, A. ; Walch, A.K. ; Kleigrewe, K. ; Razansky, D. ; Sattler, M. ; Ntziachristos, V.

Croconaine-based nanoparticles enable efficient optoacoustic imaging of murine brain tumors.
Nature 592, 768–772 (2021)

Herud-Sikimić, O. ; Stiel, A.-C. ; Kolb, M. ; Shanmugaratnam, S. ; Berendzen, K.W. ; Feldhaus, C. ; Höcker, B. ; Jürgens, G.

A biosensor for the direct visualization of auxin.

Cell Engineering: Contact

Prof. Dr. André C. Stiel
Prof. Dr. André C. Stiel

Group Leader Cell Engineering

Building 57 | room 009

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