About

Kristi S. Anseth is a professor at the University of Colorado Boulder, where she is part of the Department of Chemical & Biological Engineering and the BioFrontiers Institute. Her research group specializes in the development of innovative biomaterials for engineered cell culture and tissue regeneration. Her primary focus is on decoding cell-material interactions and developing systems and techniques to investigate these processes. She influences cellular activity across timescales using engineering concepts and modeling, with targets ranging from molecular to macroscopic. Her work aims to modulate responses such as proliferation, differentiation, and extracellular matrix deposition by designing well-defined biomaterial niches with programmed mechanics and bioactivity. Her investigations include tailored cell carriers for therapeutic applications, hydrogel-based super-resolution microscopy, and models of homeostasis and pathology. She is actively involved in advancing the understanding of how biomaterials can be used to influence cellular behavior and tissue regeneration.

Research topics

• Cell biology
• Biology
• Computer Science
• Medicine
• Chemistry
• Pathology
• Genetics
• Biochemistry
• Nanotechnology
• Artificial Intelligence
• Computational biology
• Cancer research
• Materials science
• Internal medicine
• Composite material
• Engineering
• Immunology
• Biological system
• Biomedical engineering
• History

Selected publications

• High-Refractive-Index Halogenated Urethane Acrylates in Polyurethane for 2-Stage Material Applications

  ACS Applied Polymer Materials · 2026-03-17

  articleOpen access

  High-refractive-index (HRI) monomers swollen in a rubbery host matrix to form 2-stage composite materials play a crucial role in modern optics applications and are constantly being redesigned to produce enhanced material properties. To aid in this effort, we report the synthesis of two HRI halogenated acrylate monomers and characterize their affinity for high-spatial-frequency photopatterning when swollen in a polyurethane matrix. Through refractive index measurements and high-resolution photopatterning, we show that these 2-stage films support submicrometer spatial frequencies with refractive index modulation n1 on the order of 0.01 and change in index upon polymerization Δn of 0.0023. Photopolymerization kinetics from FTIR fit a three-species kinetic model, where the dependence of the polymerization rate on incident light intensity reveals that the dominant termination kinetics in these 2-stage films is unimolecular termination, as opposed to the standard bimolecular. Critically, we show that photopatterning does not induce undesirable optical or mechanical properties such as haze, discoloration, stiffening of the films, or increased dispersion, making these materials suitable for photopatterning applications. High-fidelity holographic diffraction gratings and 2D photo-patterns with micron-scale features are presented to show proof of concept.

  PublisherDOI

• Integration and harmonization of cell shape images for generative modeling

  bioRxiv (Cold Spring Harbor Laboratory) · 2026-02-10

  articleOpen accessSenior authorCorresponding

  As cell imaging grows in scale, precision, and complexity, data integration and harmonization become increasingly important for studying cell-material interactions. Quantitative understanding of how cells respond to mechanical cues, such as substrate stiffness and topography, is often limited by differences in experimental conditions and imaging formats. This study presents a framework that combines compact, interpretable cell shape models with generative artificial intelligence to harmonize 2D and 3D immunofluorescent datasets within defined experimental contexts. By efficiently capturing morphology and associated biological features, the approach enables generation of realistic synthetic cells, including rare or intermediate phenotypes, to augment machine-learning analyses and support scalable in silico studies. This work advances data-driven investigation of cellular responses to biomaterial-derived mechanical cues.

  PublisherOA PDFDOI

• Replication Data for: Fibrillar adhesion dynamics govern the timescales of nuclear mechano-response via the vimentin cytoskeleton

  CORA.Repositori de Dades de Recerca · 2026-04-10

  datasetOpen access

  This data set includes all the source data corresponding to the each figure published in the paper entitled “Fibrillar adhesion dynamics govern the timescales of nuclear mechano-response via the vimentin cytoskeleton”. These data demonstrate that the formation of fibrillar adhesions and remodelling of the extracellular matrix protein fibronectin, delays the timescales at which the cell nucleus responds to changes in the mechanical environment. Mechanistically, this is mediated by the anchoring of the vimentin cytoskeleton to fibrillar adhesions by plectin-1f.

  PublisherDOI

• Cradles for maturation: Turning progenitor cells into functional intestinal epithelium

  Cell stem cell · 2026-03-01

  articleSenior author
  PublisherDOI

• Multi-omics Insight into Cardiac Myofibril Remodeling in Post-Prandial Burmese Pythons

  bioRxiv (Cold Spring Harbor Laboratory) · 2026-02-04

  articleOpen access

  Burmese pythons exhibit rapid cardiac remodeling in response to a dramatic increase in metabolic rate during digestion. Here, we performed single-myofibril mechanics measurements and myosin heavy chain metabolic assays to evaluate the impact of feeding on the cardiomyocyte sarcomere - the fundamental molecular unit of muscle contraction - using two experimental paradigms: normal feeding (one meal per month) and frequent feeding (eight meals per month). Myofibril tension and rate of relaxation increased during digestion in both paradigms, while frequent feeding was further associated with slower myofibril activation kinetics and faster myosin heavy chain ATP turnover. To identify molecular changes at the sarcomere and gain potential mechanistic insight, we performed multi-omics analyses. RNA sequencing identified increased expression of some sarcomere genes during digestion; however, proteomics analysis suggested a delay in sarcomere protein synthesis at the peak of remodeling, as expression of many sarcomere proteins decreased. Analysis of post-translational modifications (ubiquitinomics, phospho-proteomics, acetylomics) identified hundreds of significantly regulated sites on sarcomere proteins during digestion, including many on the tension-regulating titin and myosin heavy chain proteins. Our results detail the molecular underpinnings of cardiac remodeling in digesting Burmese pythons and suggest that nature's solution for rapidly increasing cardiac contractility is a post-translational sarcomere tuning program.

  PublisherOA PDFDOI

• Activating FGFR1 restores Integrin-β1–mediated fibronectin sensing in satellite cells of aged mice

  bioRxiv (Cold Spring Harbor Laboratory) · 2026-02-19

  articleOpen access

  Muscle satellite cells (SCs), essential for skeletal muscle regeneration, decline in number and function with age, contributing to sarcopenia. A fully defined viscoelastic hydrogel that preserves SC-myofiber interactions and supports tunable densities of fibronectin-derived RGD ligands was used to investigate age-related defects in extracellular matrix sensing by SCs. Elevating RGD density increased the number of activating and proliferating SCs on myofibers from young mice, whereas SCs from aged mice were unresponsive. Loss of FGF receptor 1 signaling in SCs from aged mice abrogated the coordinated Syndecan-4 and Integrin-β1 matrix response observed in SCs from young mice. Activating Integrin-β1 promoted asymmetric division and self-renewal in SCs from young mice whereas combined FGFR1 and Integrin-β1 signaling drove symmetric expansion. In SCs from aged mice, FGFR1 dysfunction disrupted this balance, impairing asymmetric division, but constitutive FGFR1 activation restored receptor co-localization, self-renewal, and fibronectin responsiveness. Therefore, FGFR1 integrates matrix and growth factor signals, suggesting that targeting the FGFR1-Integrin-β1 axis may enhance SC regenerative potential in aging organisms.

  PublisherDOI

• The Muscle Tissue Environment Limits Muscle Stem Cells in Aged Mice

  bioRxiv (Cold Spring Harbor Laboratory) · 2026-04-13

  articleOpen access

  Frailty arising from loss of muscle function and mass is a significant health concern impacting quality of life and dramatically increasing health care costs as our population ages. Ameliorating frailty derived from reduced muscle function is thus a critical research priority to improve health span. Cell intrinsic defects in muscle stem cells (MuSC), or satellite cells, occur as skeletal muscle ages, reducing the capacity of MuSCs to maintain and repair skeletal muscle and are accompanied by cell nonautonomous changes. Although rejuvenating stem cells in aged tissues or organs has potential to improve muscle aging phenotypes, we found that the extracellular environment in aged mice abrogates rejuvenated muscle stem cell potential. MuSCs from young mice were unable to grow on extracellular matrix derived from aged mice that contains elevated collagen protein levels, establishing a critical role for the environment in contributing to muscle phenotypes in aging. Combining an inducible FGF receptor 1 (FGFR1) to rescue MuSC intrinsic aging defects with a drug to reduce fibrosis partially rescued muscle mass loss in aged mice. We conclude that aging affects tissues, and particularly skeletal muscle tissue, via complex multifactorial processes requiring multifaceted interventions to improve aging phenotypes.

  PublisherOA PDFDOI

• Design and Synthesis of Hydrolytically Degradable PEG Carbamate, Carbonate, and Ester Derivatives to Induce Reversible Biostasis

  Biomacromolecules · 2025-02-25 · 5 citations

  article

  Control over network chemistry and connectivity of hydrogels is critical for the generation of tunable material properties, including material degradation for applications such as tissue scaffolding and drug delivery. Here, the degradation of hydrogels employing different hydrolytically cleavable groups including benzamide and syringic acid-derived carbamates, kojic acid-derived carbonates, and kojic acid-derived esters under physiological conditions was studied. Tunability of the hydrogel network degradation was demonstrated by varying the hydrolytically degradable moiety, macromer functionality, and copolymerization with hydrolytically stable macromers. These hydrolytically labile macromers were introduced and cross-linked intracellularly to induce transient cellular quiescence in MCF10A cells, resulting in a highly tunable degradation mechanism that is shown to be capable of inducing reversible biostasis of cells with 60% of cells treated with the carbonate macromer returning to their proliferative state and rebounding in translational activity after 72 h, while the biological activity of the carbamate macromer-treated cells remained suppressed.

  PublisherDOI

• PTEN Regulates Myofibroblast Activation in Valvular Interstitial Cells Based on Subcellular Localization

  Advanced Biology · 2025-04-14 · 1 citations

  articleOpen accessSenior authorCorresponding

  Aortic valve stenosis (AVS) is characterized by altered mechanics of the valve leaflets, which disrupts blood flow through the aorta and can cause left ventricle hypotrophy. These changes in the valve tissue result in the activation of resident valvular interstitial cells (VICs) into myofibroblasts, which have increased levels of αSMA in their stress fibers. The persistence of VIC myofibroblast activation is a hallmark of AVS. In recent years, the tumor suppressor gene phosphatase and tensin homolog (PTEN) has emerged as an important player in the regulation of fibrosis in various tissues (e.g., lung, skin), which motivated to investigate PTEN as a potential protective factor against matrix-induced myofibroblast activation in VICs. In aortic valve samples from humans, high levels of PTEN are found in healthy tissue and low levels of PTEN in diseased tissue. Then, using pharmacological inducers to treat VIC cultures, it is observed that PTEN overexpression prevented stiffness-induced myofibroblast activation, whereas genetic and pharmacological inhibition of PTEN further activated myofibroblasts. The increased nuclear PTEN localization is also observed in VICs cultured on stiff matrices, and nuclear PTEN also correlated with smaller nuclei, altered expression of histones, and a quiescent fibroblast phenotype. Together, these results suggest that PTEN not only suppresses VIC activation, but functions to promote quiescence, and can serve as a potential pharmacological target for the treatment of AVS.

  PublisherOA PDFDOI

• Engineered epithelial curvature controls Paneth cell localization in intestinal organoids

  Cell Biomaterials · 2025-04-01 · 12 citations

  articleOpen accessSenior author
  PublisherOA PDFDOI

Recent grants

• NIH Grant R55AR044375

  NIH · $100k · 1998

• Spatiotemporal Regulated Click Hydrogels for 3D Cell Culture

  NSF · $420k · 2010–2013

• RECODE: Materials-directed differentiation of intestinal organoids of uniform size and shape

  NSF · $1.5M · 2021–2024

• NIH Grant R01DE012998

  NIH · $2.2M · 2009

• NIH Grant R21AR057904

  NIH · $324k · 2013

Frequent coauthors

• Christopher N. Bowman

  University of Colorado Boulder

  235 shared

• Thomas P. Russell

  Lawrence Berkeley National Laboratory

  72 shared

• K. Kitazawa

  72 shared

• Tim Miller

  72 shared

• Bruce E. Kirkpatrick

  University of Colorado Boulder

  65 shared

• Leslie A. Leinwand

  University of Colorado Boulder

  54 shared

• Mark W. Tibbitt

  ETH Zurich

  54 shared

• Peter D. Mariner

  University of Colorado Boulder

  52 shared

Education

• Ph.D., Biomaterials and Tissue Engineering

  University of California, San Diego

  1996

• M.S., Biomaterials and Tissue Engineering

  University of California, San Diego

  1993

• B.S., Chemical Engineering

  University of California, San Diego

  1991