Michael West, PhD, To Deliver A Keynote Address At GTCbio Stem Cell Research & Therapeutics Conference

WORCESTER, Mass., April 11 /PRNewswire-FirstCall/ -- Michael D. West, PhD, President and Chief Scientific Officer of Advanced Cell Technology, Inc., (OTC Bulletin Board: ACTH), will be presenting “Human Embryonic Stem Cells and Nuclear Transfer: Opportunities and Challenges,” at the GTCbio Stem Cell Research and Therapeutics Conference today, April 11, 2005, at 1:30 p.m. Pacific Standard Time, in San Diego.

In the presentation, Dr. West will describe the Company’s efforts to address the challenges of translating the opportunity of human embryonic stem cell and nuclear transfer technology into new therapeutic products. In particular, Dr. West will describe the Company’s gene trap technology for isolating and tracking particular differentiated cell types, the Company’s recent published efforts on culturing human stem cells in pathogen-free conditions, unpublished data on the use of specific pathogen free avian systems to culture teratomas, the Company’s technologies that are designed to prevent rejection through nuclear transfer and homozygosity in the HLA genes, and lastly, the Company’s focus on developing products for dermatological applications in burns and scarless wound repair, applications for retinal disease, blood, and vascular applications.

Click http://www.advancedcell.com/conference_presentations.htm to download Dr. West’s presentation.”

“This conference offers a unique opportunity to come together with a diverse group of experts in both stem cell research and policy,” said Dr. West. “I look forward to representing Advanced Cell Technology in a discussion of how biotechnology and academia can work together to accelerate the translation of laboratory bench science to clinical reality.”

Advanced Cell Technology, Inc., a Delaware corporation, is a wholly-owned subsidiary of A.C.T. Holdings, Inc., a Nevada corporation. The Company, a biotechnology company applying stem cell technology in the emerging field of regenerative medicine, is currently headquartered in Worcester, Massachusetts.

For more information about Advanced Cell Technology visit http://www.advancedcell.com/.

Forward-Looking Statements

This press release contains forward looking statements that involve risks and uncertainties. Actual results, events and performance could vary materially from those contemplated by these forward-looking statements. These statements involve known and unknown risks and uncertainties that may cause the company’s actual results in future periods to differ materially from results expressed or implied by forward-looking statements. You should not place undue reliance on forward-looking statements because they involve these risks and uncertainties. You should independently investigate and fully understand all risks before making investment decisions.

Chad Griffin Noelle Gambill (310) 888-3523 http://www.advancedcell.com/

Advanced Cell Technology, Inc.

CONTACT: Chad Griffin, or Noelle Gambill, +1-310-888-3523, both MediaContacts of Advanced Cell Technology, Inc.

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