Disclosed herein are rodents (such as, but not limited to, mice and rats) genetically modified to comprise a humanized Tslp gene, a humanized Tslpr gene, a humanized 117ra gene, or a combination thereof. Compositions and methods for making such genetically modified rodents, as well as methods of using such genetically modified rodents as an animal model for diseases such as allergic diseases and cancer are provided.

An electroporation apparatus comprising an elongated hollow member in order to provide a uniform electric field during electroporation, wherein specifically, electroporation is carried out by applying electric pulses through a couple of electrodes from both end parts of the elongated hollow member, after the hollow member is charged with fluid specimen including cells and material which would be injected into the cells.

An electroporation apparatus comprising an elongated hollow member in order to provide a uniform electric field during electroporation, wherein specifically, electroporation is carried out by applying electric pulses through a couple of electrodes from both end parts of the elongated hollow member, after the hollow member is charged with fluid specimen including cells and material which would be injected into the cells.

Delivering a payload across a plasma membrane of a cell includes providing a population of cells and contacting the population of cells with a volume of an aqueous solution. The aqueous solution includes the payload and alcohol content greater than 5 percent concentration. The volume of the aqueous solution may be a function of exposed surface area of the population of cells, or may be a function of a number of cells in the population of cells. Related compositions, apparatus, systems, techniques, and articles are also described.

A novel piezo-driven cell injection system with force feedback overcomes the unsatisfied force interaction between the pipette needle and embryos in conventional position control. By integrating semiconductor strain-gage sensors for detecting the cell penetration force and the micropipette relative position in real time, the developed cell microinjection system features high operation speed, confident success rate, and high survival rate. The effectiveness of the developed cell injection system is experimentally verified by penetrating zebrafish embryos. The injection of 100 embryos are conducted with separate position control and force control. Results indicate that the force control enables a survival rate of 86%, which is higher than the survival rate of 82% produced by the position control in the same control environment. The experimental results quantitatively demonstrate the superiority of force control over conventional position control for the first time.

A novel piezo-driven cell injection system with force feedback overcomes the unsatisfied force interaction between the pipette needle and embryos in conventional position control. By integrating semiconductor strain-gage sensors for detecting the cell penetration force and the micropipette relative position in real time, the developed cell microinjection system features high operation speed, confident success rate, and high survival rate. The effectiveness of the developed cell injection system is experimentally verified by penetrating zebrafish embryos. The injection of 100 embryos are conducted with separate position control and force control. Results indicate that the force control enables a survival rate of 86%, which is higher than the survival rate of 82% produced by the position control in the same control environment. The experimental results quantitatively demonstrate the superiority of force control over conventional position control for the first time.

A composition comprising at least one nanobomb comprising at least one first particle and at least one second particle in close proximity to the first particle. The at least one first particle is able to absorb electromagnetic radiation so as to generate a vapor bubble. The generation of the vapor bubble causes the at least one second particle to be propelled over a distance D. The composition is suitable to alter a biological barrier, in particular, for deforming, permeabilizing or perforating a biological barrier. A method to alter biological barriers is also disclosed.

Devices for intracellular and intratissue nanoinjection of biomolecules into a living body and methods of producing the devices. Such a device includes a flexible substrate and nanoneedles extending from a surface of the flexible substrate, and can be produced by providing a first substrate having pillars extending from a surface thereof, locally reducing diameters of the pillars at locations thereof adjacent the first substrate, embedding distal ends of the pillars in a flexible substrate, and sufficiently expanding the flexible substrate to cause the pillars to fracture at the locations thereof adjacent the first substrate and detach therefrom to define nanoneedles extending from the flexible substrate.

Provided is a primate disease model construction method based on fast gene edition, which including (a) constructing a sgRNA expression plasmid by using a gRNA oligonucleotide and a pX330 plasmid; (b) injecting the sgRNA expression plasmid prepared in step (a) into a hepatic portal vein of a primate animal by using a biopsy needle until liver cells become cancerous for obtaining a primate disease model. The sgRNA expression plasmid constructed by the gRNA oligonucleotide and pX330 plasmid can be directly injected into the primate liver tissue, so as to construct a tumor model rapidly.

Provided is a primate disease model construction method based on fast gene edition, which including (a) constructing a sgRNA expression plasmid by using a gRNA oligonucleotide and a pX330 plasmid; (b) injecting the sgRNA expression plasmid prepared in step (a) into a hepatic portal vein of a primate animal by using a biopsy needle until liver cells become cancerous for obtaining a primate disease model. The sgRNA expression plasmid constructed by the gRNA oligonucleotide and pX330 plasmid can be directly injected into the primate liver tissue, so as to construct a tumor model rapidly.