Brutons Tyrosine Kinase Knockout Rat Model

Rat Model Catalog

Bruton’s tyrosine kinase (Btk) is a cytoplasmic enzyme encoded by the human BTK gene that plays a crucial role in B cell development, survival, proliferation and differentiation. Btk defect leads to X-linked agammaglobulinemia (XLA), a rare genetic disorder that strongly reduces the immune system, thereby affecting the ability of the organism to fight effectively against infections. Btk is also an important target for the development of innovative therapies (i.e., Btk inhibitors) for patients suffering hematologic malignancies such as chronic lymphocytic leukemia (CLL), and mantle cell lymphoma (MCL).


As rats more accurately reflect human physiology than mice, genOway has developed the first preclinical Btk Knockout rat model (Btk KO) to help scientists study a broad spectrum of medical fields, including:

  • Immunology
    • B cell malignancies (e.g., diffuse large B-cell lymphoma, chronic lymphocytic leukemia)
    • Autoimmune diseases with aberrant B cell responses (e.g., rheumatoid arthritis, systemic lupus erythematosus)
    • Hematology (e.g., hemostasis, thrombosis)
  • Toxicology
    • Screening of novel Btk inhibitors for treatment of several hematologic cancers and autoimmune diseases
    • Oncology (e.g., pancreatic cancer, breast cancer)

Request a quote here to get pricing, offers and Btk rat model information by phone or email.


Model features

  • Lack of Btk protein expression
  • B cell developmental defects (i.e., decreased number of peripheral B cells, defects in B cell maturation and activation)
  • Sprague Dawley outbred genetic background

Model validation

Btk rat model validation 1

Homozygous Btk KO rats do not express Btk protein

Western blot analyses of splenocyte samples from wild-type and homozygous Btk Knockout rats (Btk KO). Membranes were incubated with antibodies against Btk or GAPDH as a loading control.

Btk rat model validation 2

The number of splenocytes, peripheral B cells and mature B cell population is significantly reduced in homozygous Btk KO rats.

Hemocytometer and flow cytometry counts of splenocytes and B cells in homozygous Btk KO (Btk KO) and wild-type rats. As expected, Btk KO rats display a significantly reduced number of A) splenocytes and B) peripheral B cells compared to wild-type rats, confirming that their spleen is decreased in size. C, D) Flow cytometry analyses of peripheral B cells show that the mature B cell population (CD45RA+) is significantly reduced in Btk KO rats.

* For more validation data please contact us.


Further reading


Ready to be shipped to your lab

  • Cohorts available upon request
  • SPF certification and worldwide delivery by professional breeders
  • Models provided with FTO on patent-protected technologies used for model generation