Genetically modified non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome are provided. Also provided are methods for making non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome, and methods for using non-human animals expressing human SIRP? and human IL-15 from the non-human animal genome. These animals and methods find many uses in the art, including, for example, in modeling human T cell and/or natural killer (NK) cell development and function, in modeling human pathogen infection of human T cells and/or NK cells, and in various in vivo screens.

Nucleic acid molecules encoding transcription activator like effector nucleases (TALENs) for targeting a hepatitis B virus (HBV) genome are described. Also described are compositions, host cells, lipids, and pharmaceutical compositions containing the TALENs. Methods for treating hepatitis infection, particularly in individuals having chronic HBV infection, using the pharmaceutical compositions of the invention are also described.

Non-human animals, expressing humanized CD3 proteins are provided. Non-human animals, e.g., rodents, genetically modified to comprise in their genome humanized CD3 proteins are also provided. Additionally, provided are methods and compositions of making such non-human animals, as well as methods of using said non-human animals.

Various aspects described herein provide methods of generating alveolar or alveolar/airway organoids from a population of lung cells to differentiate into alveolar or alveolar/airway organoids. Also provided herein are methods and compositions for treating lung disease comprising transplantation of the alveolar or alveolar/airway organoids, or a cell isolated therefrom to a subject.

Genetically modified rodents such as mice and rats, and methods and compositions for making and using the same, are provided. The rodents comprise a humanization of at least one endogenous rodent Tmprss gene, such as an endogenous rodent Tmprss2, Tmprss4, or Tmprss11d gene.

Genetically modified rodents such as mice and rats, and methods and compositions for making and using the same, are provided. The rodents comprise a humanization of at least one endogenous rodent Tmprss gene, such as an endogenous rodent Tmprss2, Tmprss4, or Tmprss11d gene.

A reporter gene that can be administered to an individual such as HIV-BAL-eLuc in order to detect the presence of a virus. A method of detecting the presence of virus in an individual, by administering a reporter gene to the individual, associating the reporter gene with the virus, imaging the individual, and detecting the presence of virus in the individual. A method of determining the efficacy of a treatment for a virus, by administering a reporter gene to the individual receiving treatment for the virus, associating the reporter gene with the virus, imaging the individual, detecting the presence of virus in the individual, and determining if the treatment is effective.

This disclosure provides peptides which have a strong affinity for the checkpoint receptor programmed death 1 (PD-1). These peptides block the interaction of PD-1 with its ligand PD-L1 and can therefore be used for various therapeutic purposes, such as inhibiting the progression of a hyperproliferative disorder, including cancer; treating infectious diseases; enhancing a response to vaccination; treating sepsis; and promoting hair re-pigmentation or lightening of pigmented skin lesions.

Compositions for the in vivo delivery of a gene editing CRISPR/Cas9 complex was developed to eliminate integrated retroviral DNA sequences from latently infected human cells and animal disease models.

Genetically modified mice comprising a nucleic acid sequence encoding a human M-CSF protein are provided. Also provided are genetically modified mice comprising a nucleic acid sequence encoding a human M-CSF protein that have been engrafted with human cells such as human hematopoietic cells, and methods for making such engrafted mice. These mice find use in a number of applications, such as in modeling human immune disease and pathogen infection; in in vivo screens for agents that modulate hematopoietic cell development and/or activity, e.g. in a healthy or a diseased state; in in vivo screens for agents that are toxic to hematopoietic cells; in in vivo screens for agents that prevent against, mitigate, or reverse the toxic effects of toxic agents on hematopoietic cells; in in vivo screens of human hematopoietic cells from an individual to predict the responsiveness of an individual to a disease therapy, etc.