About

The provided page text does not contain a specific professional biography of Professor Ken Muneoka. It primarily includes general information about the Texas A&M College of Veterinary Medicine & Biomedical Sciences, its research, academic programs, facilities, and outreach activities. There is no detailed biographical or research-focused content about Professor Ken Muneoka in the text.

Research topics

• Biology
• Cell biology
• Anatomy
• Medicine
• Pathology
• Surgery
• Immunology
• Genetics

Selected publications

• Digit regeneration in mice is stimulated by sequential treatment with FGF2 and BMP2

  Nature Communications · 2026-04-17

  articleOpen accessSenior authorCorresponding

  Epimorphic regeneration in mice is stimulated at a non-regenerative digit amputation by sequential treatment with FGF2 and BMP2 (FGF2→BMP2). FGF2 stimulates digit amputation wound cells to form a blastema and BMP2 induces blastema differentiation to regenerate the amputated distal phalangeal element, albeit imperfectly. The formation of a phalangeal growth plate suggests that the induced regenerate recapitulates embryonic development and cell lineage studies show that wound cells that enter the blastema cells are positionally re-specified during regeneration. FGF2→BMP2 treatment also stimulates a blastema-independent response that regenerates a synovial joint complex containing stump-derived tendon, ligament and a sesamoid-like bone. Together the blastema-dependent and blastema-independent responses can result in the regeneration of all skeletal structures removed by amputation. The induced regeneration response demonstrates the availability of regeneration competent cells at a non-regenerating wound, and that FGF and BMP signaling is sufficient to trigger a regenerative outcome at wounds that heal by fibrosis. Wound fibrosis after amputation in mammals is replaced with regeneration of amputated structural elements by sequential FGF2/BMP2 treatment. Regenerated tissues include phalangeal/sesamoid bones, tendon/ligament, synovial joint, articular cartilage.

  PublisherOA PDFDOI

• From farm to lab: Gene-edited sheep transforming bone research

  JBMR Plus · 2026-04-11

  articleOpen access

  Abstract For more than half a century, mice have been the workhorse of biomedical research. Their small size, rapid reproduction, and well-characterized genetics make them ideal disease models, and genome editing has enabled transgenic, knock-out, and knock-in lines that mimic numerous human conditions. These advances transformed modern biology, yielding fundamental insights into cancer, metabolism, immunity, and more. Their strengths notwithstanding, mouse models have important limitations, as biology does not scale neatly across species. Differences in physiology, size, and metabolism can obscure—or even distort—experimental outcomes. Nowhere is this clearer than in musculoskeletal research. Human bones are dynamic tissues that undergo Haversian remodeling, whereas mice exhibit limited Haversian remodeling and display distinct temporal growth trajectories. Moreover, mice have monophyodont dentition and craniofacial development diverges in ways that impact maxillofacial studies, and aging timelines differ. These differences limit our ability to understand human bone disorders from murine models alone. Biotechnology offers a new path forward: advances in genome sequencing, assembly and molecular engineering enable precise DNA editing in larger domesticated species—sheep, goats, and pigs—whose skeletal size, biomechanics, growth patterns, and remodeling dynamics more closely mirror humans. By introducing targeted, patient-relevant mutations, large-animal models can replicate mechanisms difficult to capture in mice and support longitudinal, clinically-relevant phenotyping—imaging, histomorphometry, serum biomarkers, and functional testing—in a translatable human-like context. The implications are profound. Large-animal models can validate disease pathways, refine biomarkers, and evaluate drugs, biologics, and implants, potentially improving treatment strategies and reducing clinical failures and costs. This shift does not diminish the value of mice, whose genetic tractability and cost-effectiveness ensure a central and continued important role in discovery. Rather, it adds a complementary strategy: expand to gene-edited large-animal models when human skeletal-like biology matters and where mice fall short, thereby bridging the gap between fundamental research and clinical reality.

  PublisherDOI

• FGF8 induces bone and joint regeneration at digit amputation wounds in neonate mice

  Bone · 2025-10-04 · 1 citations

  articleOpen access

  Due to increases in vascular diseases, the incidence of limb loss is predicted to more than double in the next quarter century. Therefore, developing a greater understanding of the latent regenerative capacity in mammals is a significant and growing goal. Mammals, including humans and mice, have limited regenerative capacity following limb amputation, with regenerative responses restricted to amputations transecting the distal digit tip (P3). Unlike P3, amputations of the adjacent skeletal segment, the middle phalanx, P2, are non-regenerative and result in bone truncation and soft tissue scar formation. As such, P2 amputation is a simple yet powerful model to test strategies for inducing mammalian musculoskeletal regeneration from an otherwise non-regenerative amputation plane. Here, we report that Fibroblast Growth Factor 8 (FGF8) drives synovial joint regeneration at P2 amputation wounds in neonate mice. This response is characterized by the regeneration of a synovial cavity, a skeletal nodule lined with articular cartilage, and tendon and ligament regeneration. FGF8 also induces cartilage formation on the P2 stump that serves as a template for partial P2 bone regeneration, thus FGF8 drives the composite regeneration of stump and joint tissues. FGF8-induced joint regeneration is associated with the upregulation of several, but not all, genes that characterize joint development, and is morphologically distinct from digit joint development. Lineage tracing studies demonstrate that cells at the amputation wound contribute to the regenerated joint structures. These studies provide evidence that the otherwise non-regenerative P2 amputation wound possesses tremendous regenerative capacity that is dormant under normal circumstances.

  PublisherDOI

• Digit regeneration in mice is stimulated by sequential treatment with FGF2 and BMP2

  Research Square · 2025-06-11 · 1 citations

  preprintOpen access1st authorCorresponding
  PublisherOA PDFDOI

• Male Down syndrome Ts65Dn mice have impaired bone regeneration

  Bone · 2024-12-13 · 1 citations

  articleOpen access

  Trisomy of human chromosome 21 (Ts21) individuals present with a spectrum of low bone mineral density (BMD) that predisposes this vulnerable group to skeletal injuries. To determine the bone regenerative capacity of Down syndrome (DS) mice, male and female Dp16 and Ts65Dn DS mice underwent amputation of the digit tip (the terminal phalanx (P3)). This is a well-established mammalian model of bone regeneration that restores the amputated skeletal segment and all associated soft tissues. P3 amputation was performed in 8-week-old male and female DS mice and WT controls and followed by in vivo μCT, histology and immunofluorescence. Following P3 amputation, the bone degradation phase was attenuated in both Dp16 and Ts65Dn males. In Dp16 males, P3 regeneration was delayed but complete by 63 days post amputation (DPA); however, male Ts65Dn exhibited attenuated regeneration by 63 DPA. In both Dp16 and Ts65Dn female DS mice, P3 regenerates were indistinguishable from WT by 42 DPA. In Ts65Dn males, osteoclasts and eroded bone surface were significantly reduced, and osteoblast number significantly decreased in the regenerating digit. In Ts65Dn females, no significant differences were observed in any osteoclast or osteoblast parameter. Like Ts21 individuals and DS mice with sex differences in bone mass, these data expand the characteristic sexually dimorphism to include bone resorption and regeneration in response to skeletal injury in Ts65Dn mice. These observations suggest that sex differences contribute to the poor bone healing of DS and compound the increased risk of bone injury in the Ts21 population.

  PublisherDOI

• Induced regeneration of articular cartilage – identification of a dormant regeneration program for a non-regenerative tissue

  Development · 2023-10-26 · 4 citations

  articleOpen accessSenior author

  A mouse organoid culture model was developed to regenerate articular cartilage by sequential treatment with BMP2 and BMP9 (or GDF2) that parallels induced joint regeneration at digit amputation wounds in vivo. BMP9-induced chondrogenesis was used to identify clonal cell lines for articular chondrocyte and hypertrophic chondrocyte progenitor cells from digit fibroblasts. A protocol that includes cell aggregation enhanced by BMP2 followed by BMP9-induced chondrogenesis resulted in the differentiation of organized layers of articular chondrocytes, similar to the organization of middle and deep zones of articular cartilage in situ, and retained a differentiated phenotype following transplantation. In addition, the differentiation of a non-chondrogenic connective tissue layer containing articular chondrocyte progenitor cells demonstrated that progenitor cell sequestration is coupled with articular cartilage differentiation at a clonal level. The studies identify a dormant endogenous regenerative program for a non-regenerative tissue in which fibroblast-derived progenitor cells can be induced to initiate morphogenetic and differentiative programs that include progenitor cell sequestration. The identification of dormant regenerative programs in non-regenerative tissues such as articular cartilage represents a novel strategy that integrates regeneration biology with regenerative medicine.

  PublisherOA PDFDOI

• Digit specific denervation does not inhibit mouse digit tip regeneration

  Developmental Biology · 2022-03-27 · 15 citations

  articleOpen accessSenior author
  PublisherOA PDFDOI

• Microcomputed tomography staging of bone histolysis in the regenerating mouse digit

  Wound Repair and Regeneration · 2022-09-30 · 6 citations

  article

  Humans and mice have the ability to regenerate the distal digit tip, the terminal phalanx (P3) in response to amputation. What distinguishes P3 regeneration from regenerative failure is formation of the blastema, a proliferative structure that undergoes morphogenesis to regenerate the amputated tissues. P3 regeneration is characterised by the phases of inflammation, tissue histolysis and expansive bone degradation with simultaneous blastema formation, wound closure and finally blastemal differentiation to restore the amputated structures. While each regenerating digit faithfully progresses through all phases of regeneration, phase progression has traditionally been delineated by time, that is, days postamputation (DPA), yet there is widespread variability in the timing of the individual phases. To diminish variability between digits during tissue histolysis and blastema formation, we have established an in-vivo method using microcomputed tomography (micro CT) scanning to identify five distinct stages of the early regeneration response based on anatomical changes of the digit stump. We report that categorising the initial phases of digit regeneration by stage rather than time greatly diminishes the variability between digits with respect to changes in bone volume and length. Also, stages correlate with the levels of cell proliferation, osteoclast recruitment and osteoprogenitor cell recruitment. Importantly, micro CT staging provides a means to estimate open versus closed digit wounds. We demonstrate two spatially distinct and stage specific bone repair/regeneration responses that occur during P3 regeneration. Collectively, these studies showcase the utility of micro CT imaging to infer the composition of radiolucent soft tissues during P3 blastema formation. Specifically, the staging system identifies the onset of cell proliferation, osteoclastogenesis, osteoprogenitor recruitment, the spatial initiation of de novo bone formation and epidermal closure.

  PublisherDOI

• Epimorphic regeneration of the mouse digit tip is finite

  Stem Cell Research & Therapy · 2022-02-07 · 12 citations

  articleOpen access

  BACKGROUND: Structural regeneration of amputated appendages by blastema-mediated, epimorphic regeneration is a process whose mechanisms are beginning to be employed for inducing regeneration. While epimorphic regeneration is classically studied in non-amniote vertebrates such as salamanders, mammals also possess a limited ability for epimorphic regeneration, best exemplified by the regeneration of the distal mouse digit tip. A fundamental, but still unresolved question is whether epimorphic regeneration and blastema formation is exhaustible, similar to the finite limits of stem-cell mediated tissue regeneration. METHODS: In this study, distal mouse digits were amputated, allowed to regenerate and then repeatedly amputated. To quantify the extent and patterning of the regenerated digit, the digit bone as the most prominent regenerating element in the mouse digit was followed by in vivo µCT. RESULTS: Analyses revealed that digit regeneration is indeed progressively attenuated, beginning after the second regeneration cycle, but that the pattern is faithfully restored until the end of the fourth regeneration cycle. Surprisingly, when unamputated digits in the vicinity of repeatedly amputated digits were themselves amputated, these new amputations also exhibited a similarly attenuated regeneration response, suggesting a systemic component to the amputation injury response. CONCLUSIONS: In sum, these data suggest that epimorphic regeneration in mammals is finite and due to the exhaustion of the proliferation and differentiation capacity of the blastema cell source.

  PublisherOA PDFDOI

• Hyaline cartilage differentiation of fibroblasts in regeneration and regenerative medicine

  Development · 2022 · 20 citations

  Senior authorCorresponding
  • Biology
  • Cell biology
  • Pathology

  Amputation injuries in mammals are typically non-regenerative; however, joint regeneration is stimulated by BMP9 treatment, indicating the presence of latent articular chondrocyte progenitor cells. BMP9 induces a battery of chondrogenic genes in vivo, and a similar response is observed in cultures of amputation wound cells. Extended cultures of BMP9-treated cells results in differentiation of hyaline cartilage, and single cell RNAseq analysis identified wound fibroblasts as BMP9 responsive. This culture model was used to identify a BMP9-responsive adult fibroblast cell line and a culture strategy was developed to engineer hyaline cartilage for engraftment into an acutely damaged joint. Transplanted hyaline cartilage survived engraftment and maintained a hyaline cartilage phenotype, but did not form mature articular cartilage. In addition, individual hypertrophic chondrocytes were identified in some samples, indicating that the acute joint injury site can promote osteogenic progression of engrafted hyaline cartilage. The findings identify fibroblasts as a cell source for engineering articular cartilage and establish a novel experimental strategy that bridges the gap between regeneration biology and regenerative medicine.

  PublisherDOI

Recent grants

• NIH Grant R01HD043277

  NIH · $2.3M · 2010

• NIH Grant R29HD023921

  NIH · $497k · 1995

• NIH Grant R01HD035245

  NIH · $594k · 2002

• NIH Grant P01HD022610

  NIH · $12.7M · 2011

Frequent coauthors

• Lindsay Dawson

  Texas A&M University

  46 shared

• Jennifer Simkin

  University of Kentucky

  33 shared

• Mingquan Yan

  Peking University

  32 shared

• Connor P. Dolan

  31 shared

• Susan V. Bryant

  University of California, Irvine

  30 shared

• Ling Yu

  26 shared

• Rosalie Anderson

  Loyola University New Orleans

  26 shared

• Gail P. Taylor

  The University of Texas at San Antonio

  25 shared

Education

• PhD, Developmental and Cell Biology

  University of California Irvine

  1983

• BA, Biology

  Humboldt State University

  1976