However, this does not necessarily imply that HR occurs at low efficiency in Drosophila embryos; injecting Cas9 and guide RNA-encoding plasmids along with a template to be copied yielded correct insertions in 13/16 embryos (Gratz et al., 2013 ).
In contrast, injecting Cas9 and guide RNAs targeting two genes along with templates for repair into mouse embryos yielded 7/10 pups with the first insertion and 8/10 with the second insertion, with six of those having both; all other mice utilized NHEJ.
In both groups the radiotracer was injected intratumorally guided by either ultrasound or stereotaxis depending on the visibility of the tumour.
In patients with non-palpable tumors the radiotracer was injected intratumorally guided by either ultrasound or stereotaxis, depending on the visibility of the tumor.
These findings were extended in vivo by co-injecting guide RNAs targeting the Mecp2 locus with mutant Cas9 mRNA into single-cell mouse zygotes.
Sung et al. (2014) reported successful editing by injecting ribonucleoprotein (Cas9 protein:guide RNA) into zebrafish and mouse embryos.
For each rat, 1.0 μL of viral vector was injected through the guide cannula of the optrode array device into the left VTA (DV = −8.5 mm).
A hollow guide screw was implanted into a small drill hole made at 2 mm left and 1 mm anterior to the bregma, and then 2 × 10 tumor cells in 5 μl HBSS were injected through this guide screw into the white matter at a depth of 2 mm [anterior/posterior (AP) +0.5 mm, medial/lateral (ML) +1.7 mm, dorsal/ventral (DV) -3.2 mm].
As a new method, the possibility to increase the ion guide efficiency by injecting electrons into the stopping volume is introduced.
Moreover, the presence of a guide wire when injecting the radiotracer did not influence the success rate of the SLNB.
This study was unable to demonstrate a therapeutic benefit for i.p. injected monoclonal antibody guided radiotherapy for solid intraperitoneal tumour but suggests that it may be capable of controlling the accumulation of antigen positive malignant ascites.
