HOME >> BIOLOGY >> NEWS
'Blind' cells see the light; maybe someday humans will, too

ence.

The idea of genetically engineering surviving retinal cells to be sensitive to light has various advantages over the most common approach to creating a bionic eye -- inserting electrodes into the optic nerve to simulate the cell firings a visual scene normally would excite. Though this technique works fairly well in the ear -- witness the success of cochlear implants -- the eye is a much more complicated place, Kramer said.

"This is a more organic, less invasive approach than electrodes," Kramer said, noting that insertion of electrodes can cause problems with biocompatibility. Electrodes also are large and tend to stimulate an entire bank of cells at once, which would limit the resolution.

"How well electrodes would work depends on the density of the electrode array and how well you can marry the electrodes with the neural elements underneath," he said. "Our approach is not a mere chip on the retina it may allow us to cover the entire retina with light sensitive cells. If each nerve responds individually, you could do a very fine scan of the retinal field and create much, much better spatial resolution."

Current, admittedly early attempts at restoring sight with electrodes in the retinal ganglion cells, whose axons bundle together to form the optic nerve entering the brain, allow the patient to see little more than patches of light and dark, Kramer noted.

Kramer, a researcher with UC Berkeley's Helen Wills Neuroscience Research Institute and a member of the campus's Health Sciences Initiative, studies ion channels -- protein valves that regulate the flow of charged atoms in and out of cells. Spanning the membranes of nerve cells, sodium and potassium channels, in particular, facilitate the transmission of electrical signals along the length of the cell.

Trauner, on the other hand, specializes in synthesizing large, complex molecules. Together, the two scientists conceived the idea of modifying an ion channel t
'"/>

Contact: Robert Sanders
rsanders@berkeley.edu
510-643-6998
University of California - Berkeley
21-Nov-2004


Page: 1 2 3 4 5

Related biology news :

1. Newly created cancer stem cells could aid breast cancer research
2. ESF EURYI award winner aims to stop cancer cells reading their own DNA
3. OHSU turns mouse into factory for human liver cells
4. UCLA scientists produce functioning neurons from human embryonic stem cells
5. UCF research links proteins, stem cells and potential Alzheimers treatment
6. Teamwork between 2 key proteins necessary for normal development and regulation of red blood cells
7. In a first, Einstein scientists discover the dynamics of transcription in living mammalian cells
8. How cells change the pace of their steps
9. Discredited Korean embryonic stem cells true origins revealed
10. A low expression of MX2 gene exists in the white blood cells of narcoleptics
11. Penn researchers discover pathway that eliminates genetic defects in red blood cells

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/2/2020)... (PRWEB) , ... March 02, 2020 , ... ... at the 71st annual Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy ( ... Chicago, Illinois. Pittcon is the world’s leading annual conference and exposition on laboratory ...
(Date:2/28/2020)... ... February 27, 2020 , ... An ... innovative treatment solutions for maladies, such as Inflammatory Bowel Disease (IBD), specifically Crohn’s ... segment will focus on a novel platform developed by Deka Biosciences, Inc. (Deka ...
(Date:2/28/2020)... ... February 28, 2020 , ... Regen Suppliers is now ... all available stem cell and exosome biologics. , Regen Suppliers offers an extensive ... kits, adipose kits, PDO thread lifts and more. The company is truly ...
Breaking Biology News(10 mins):
(Date:3/10/2020)... ... 10, 2020 , ... Ortho Clinical Diagnostics, a global leader of in vitro ... Sera, ID-MTS, a suite of extended antigen in a gel testing format used for ... VISION® and ORTHO VISION® Max in the United States and Canada. The clearances allow ...
(Date:3/10/2020)... ... March 10, 2020 , ... Lifecycle Biotechnologies announced ... in Cleburne, Texas to be used as a biopharmaceutical and biotechnology production and development ... sales offices as well as its production and development hub. The company expects to ...
(Date:3/4/2020)... ... , ... This month, Cognosante will make its annual appearance at the HIMSS ... and emerging offerings that align with the HIMSS annual theme, “Be the Change.” ... and engaging. From Interoperability and HIE to Cloud Computing ...
(Date:3/3/2020)... ... March 03, 2020 , ... Ideal Implant ... latest breast implant technology at the IMCAS Innovation Shark Tank 2020 in Paris, ... dermatology, plastic surgery, and aesthetic science industries that promise to revolutionize medical practices ...
Breaking Biology Technology:
Cached News: