VESTAR ISSUES STATEMENT REGARDING PATENT ISSUED TO LIPOSOME TECHNOLOGY, INC.
SAN DIMAS, Calif., Jan. 19 /PRNewswire/ -- Vestar, Inc. (NASDAQ: VSTR) today issued the following statement in response to inquiries from the investment community: "We are aware of the U.S. patent issued to Liposome Technology, Inc. that was announced earlier today. The methodology described in this patent does not appear to be relevant to Vestar's product, AmBisome(R). This patent concerns a process for preventing the alteration in size of liposomes that enclose amphotericin B. It also describes increased toxicity when such size changes occur. We are very pleased to state that AmBisome does not change size before lyophilization (freeze drying) or after reconstitution back to a liquid solution, and therefore we do not need any process to prevent size changes. In fact, we believe the size stability of AmBisome is one of the reasons that the toxicity of our product is so low." Vestar, headquartered in San Dimas, Calif., develops, manufactures and markets pharmaceuticals to treat patients with cancer and serious infections, including AIDS. Among the company's proprietary drug delivery technologies are liposomes to encapsulate pharmaceuticals, and lipid prodrug technology for the development of orally active compounds. Since 1989, Vestar has been marketing in Europe AmBisome, a liposomal formulation of amphotericin B, to treat systemic fungal infections. DaunoXome(R), a liposomal formulation of the chemotherapeutic agent daunorubicin, is in development as Vestar's second major product. -0- 1/19/93 /CONTACT: Michael E. Hart, chief financial officer, of Vestar, Inc., 714-394-4119; or Marcia A. Kean, executive VP, of Feinstein Partners Inc., 617-577-8110, for Vestar/ (VSTR)
CO: Vestar, Inc. ST: California IN: MTC SU:
SJ -- NE0017 -- 6449 01/19/93 14:41 EST
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|Date:||Jan 19, 1993|
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