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Featured Device

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Product Code: SONIDEL SP100

Desc:Sonoporator
Applic:(hover for application)Application:
  • Delivery of plasmids to cells and tissues for gene therapy-based applications and studies.
  • Delivery of nucleic acids such as siRNA, RNAi etc. to cells and tissues for studies on control of gene expression/gene therapy.
  • Delivery of cancer chemotherapeutic agents to impermeable target cells/tissues.
  • Delivery of agents to cells to study metabolic effects.


Featured Electrode



Product Code: CUY520P15x15

Application:
Electrodes for Electro Cell Fusion
Description:
For Plant Seed Electroporation CUY520P15X15 (Bath w/platinum plate electrodes on petridish, 15mm gap, L15 x W15 x H3mm

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Mouse Embryo – Eye

Early Postnatal Mouse Eye and In Utero Embryo EP

Early Postnatal Mouse Eye EP

For your information:

With respect to gene delivery into Mouse Embryo Eye (and Brain) one can use the tungsten needle type electrode. However, as the mouse embryo is very small it is often hard to inject DNA into the embryo’s eye.

Some clients have reported using  the CUY675P5 electrode

It is structurally possible to use this electrode for both Embryo (in utero) and Mouse Eye electroporation.

(Please note the table below).

 In Vivo Retina EP CUY675P5

CUY675P5

.. In Vivo Retina  CUY650P7

CUY650P7

Diagram1 Diagram2
 The left eye and the optic nerve were exposed. 

A small hole was made with a 31-gauge needle 0.5 to 1.0 mm
posterior to the limbus. The tip of the needle was viewed as it entered the vitreous at a 40° to 50° angle through the dilated pupil. 10 μg plasmid DNA in 4 μL TE buffer was injected into the vitreous.

The eye was then immediately grasped between tweezerz-type electrodes, with the cathode attached to the corneal electrode and the anode with the slit attached to the scleral electrode.

Arrangement of electrodes for in vivo electroporation for RPE transfection.

(A) Tweezer-type electrodes were placed on the corneal surface of either eye of a 1-month-old Sprague-Dawley rat.

(B) The current was applied with the positive electrode contralateral to the injected eye. After prior injection of plasmid DNA into the subretinal space of the right eye, this arrangement electrophoresed the negatively-charged DNA toward the RPE layer (arrowheads).

As one can see, however, there is a cut-out on  one side of the CUY675P type electrodes.  So, for this application we are not convinced that it is the optimum electrode for the application.

Rather, our recommendation is for the CUY650P7 electrode.  Note the attached CUY650P7 Technical Drawing.

Technical Drawing: CUY650P7

This is the electrode most of our clients choose.  It has a fully rounded set of electrode paddles and therefore covers a larger area of the target.  In addition, this electrode has a much wider application range and can be used, for example, for or (whole) Cultured Mouse Embryos and Large Tissue EP.

Dr. Matsuda uses the CUY650P7 electrode in his articles contained in the ‘EP with Retina’ below).

Takahiko Matsuda and Constance L. Cepko

Electroporation and RNA interference in the rodent retina in vivo and in vitro

PNAS, Volume 101, Number 1, Pages 16-22, 6 January 2004

 

In Utero Embryo EP

The standard electrodes for In Utero Embryo EP are CUY650P3 and CUY650P5, which have circle electrodes without a cut.

CUY650P5 technical Drawing

 

Mouse Embryo – Cornea

For gene delivery into Mouse Embryo – Cornea we recommend:

–          CUY671P1 or                                        Technical Drawing: CUY671P1

–          CUY670 Technical Drawing: CUY670

Protocol Recommendation:

–  ‘Electroporation and RNA interference in the rodent retina in vivo and in vitro

–  ‘Protocol for in vivo electroporation into mouse/rat retina’

–  ‘Compensation by tumor suppressor genes during retinal development in mice and humans

For your further information, note the article titled:

–  ‘A role for ligand-gated ion channels in rod photoreceptor development’.

In this article and ‘Electroporation and RNA interference in the rodent retina in vivo and in vitro’ above genes are transfected into mouse and rat retina.  We believe that the method outlined in these articles can be applied to Gene Therapy

 

Retina Cell EP – Results


Cell Line
V TE Cell Line V TE
RPE Retinal Pigment Epithelium Cells 90% 70% RPE-1 Retinal Pigment Epithelium Cells 90% 80%

(See the cell images by clicking the cell names)

V: Viability, TE: Transfection Efficiency

A larger range of successfully electroporated cells is available at this link to our website: SONIDEL Cell Transfection Database


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