Neal G. Koller
President & Chief Executive Officer

    3724a Thomas Point Road
    Annapolis, Maryland  21403
    USA
    Tel:  +1 443 994 0101
    Fax:  +1 410 990 9817
    nkoller@plurogen.com
PluroGen Therapeutics, Inc.
503 Broadleaf Way
Charlottesville, Virginia  22911
USA
Tel:  +1 443 994 0101
Fax:  +1 410 990 9817
www.plurogen.com
July 23, 2007


RE:  PluroGen Therapeutics Q2 2007 Investor Update

Dear Investor

We hope this 2nd quarter update finds you enjoying the summer.  Reflected below are a number of accomplishments
since our last update in late March.  We feel significant progress has been made.

Q2 '07 Update, Solid steps forward for PluroGen:

Key developments in this most recent quarter:

  • Generated positive results with our gel technology for improving blood flow in injured tissue
  • This work supported the filing of a 2nd provisional patent in 2007 on the company’s gel technology
    platform, PluroGel™.  (Our 1st new patent filing on the gel technology relates to the use of PluroGel™ to
    prevent and treat biofilms)

  • Generated positive results in Dr. Katz’s lab for enhancing diabetic wound healing using adipose (fat) tissue
    derived stem cells (ASCs)
  • This work has supported the filing of 3 patent applications to date, creating a solid foundation of
    intellectual property for this exciting and cutting-edge technology platform

Regulatory & Clinical
  • Draft of the FDA Orphan Drug Application for our 1st product is almost complete
  • Draft of the FDA IND for our 1st product is well underway
  • Draft of the Skin Irritancy Study is ready to insert into the IND
  • Continued our regular contact with the FDA following-up the Phase III Clinical Trial Synopsis submission
  • Reduced the list of potential regulatory partners for Europe to a short list - activities limited to next round of  
    funding

Product Development
  • The “Key Developments” section (above) discusses our 2 major R&D results this quarter
  • Initiated negotiations to prototype our next round of products, which are dressings impregnated with our gel
    products for burns  and wounds - activities limited to next round of funding
  • Initiated negotiations to establish relationships and testing protocols with expert laboratories in the field of bio-
    films - activities limited to next round of funding.
  • Initiated partnership/licensing negotiations with a company with intellectual property that may ultimately broaden
    and/or strengthen claims of our PluroGel™ product pipeline

Intellectual Property
  • The “Key Developments” section (above) discusses our 2 major patent filings this quarter
  • 2 additional new PluroGen patents on the gel technology platform are in conception stage
  • Progressed license negotiations for Dr. Katz’s fat-derived stem cell patents, applications and research for wound
    healing applications with UVA and friendly 3rd party
  • This represents an exciting, and forward-looking additional wound care platform for PluroGen
  • Finalized negotiations of a new, more favorable license agreement for the gel technology with UVA, now moving
    through internal UVA approval process

Manufacturing
  • DPT Labs completed its plan for formulation and manufacturing scale-up to meet FDA regulations
  •  DPT Labs finalizing scaleable formulation for the our 1st product

Funding
  •  Opened bridge funding round raising and initial USD 150,000.00
  •  The Virginia Active Angel Network completed its investment
  •  Jefferson Corner Group completed its investment
  •   Series A Offering Memorandum nearly complete
  • Early meetings have been initiated with potential investors, including several VC firms.  Discussions are
    positive but no firm commitments.
  • Target $7M round to support clinical program and product pipeline development

Other
  • In mid May we presented at the Bio East conference in Montreal
  • In late May we presented at the Mid Atlantic Diamond Ventures conference in Philadelphia
  • In late June we were the expert guest on one of Washington DC’s premier business radio shows, Tomorrow’s
    Business Today

We would like to thank you for your interest and your investment in PluroGen.  With your support, we have been able to
move this technology significantly forward and hope this update is informative.  If you have any questions please do not
hesitate to contact us.  We are happy to talk further and provide any answers.


Best regards,

Neal G. Koller

NGK/sa