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Biotech / Medical : Ciphergen Biosystems(CIPH): -- Ignore unavailable to you. Want to Upgrade?


To: Biomaven who wrote (326)4/12/2005 2:05:09 PM
From: tuck  Read Replies (1) | Respond to of 510
 
[Cytologic and SELDI analysis of ductal lavage versus breast cancer]

>>Cancer. 2005 Apr 8; [Epub ahead of print]

Cytologic findings and protein expression profiles associated with ductal carcinoma of the breast in ductal lavage specimens using surface-enhanced laser desorption and ionization-time of flight mass spectrometry.

Mendrinos S, Nolen JD, Styblo T, Carlson G, Pohl J, Lewis M, Ritchie J.

Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia.

BACKGROUND: Early detection of breast carcinoma enhances the chances for patient survival. The authors' work focused on an innovative technique that couples breast ductal lavage (DL) with surface-enhanced laser desorption and ionization-time of flight mass spectrometry (SELDI-TOF MS) to yield a highly sensitive and specific method of breast carcinoma detection. METHODS: The study group included 16 women who had unilateral, biopsy-proven breast carcinoma. Studying paired DL specimens from each woman (the breast with and the breast without carcinoma), a cytologic investigation was performed on the cells present in the DL samples, and the protein content of the DL fluid was analyzed with the SELDI-TOF MS technique using the strong anionic exchange chip surface. RESULTS: Only 5 of 16 DL specimens (31%) from breasts with biopsy-proven carcinoma contained malignant cells, whereas the remaining samples contained only histiocytes and clusters of benign ductal epithelium. In contrast, 12 of 16 DL specimens (75%) from breasts that contained carcinoma had a different protein peak pattern compared with the paired DL specimen from the same patient's contralateral, uninvolved breast. This finding was independent of the presence of neoplastic cells in the lavage fluid. In addition, specific protein peaks, which may represent potential biomarkers, were identified in the DL fluids from breasts with carcinoma. Some of these peaks were conserved between different patients. CONCLUSIONS: The combination of breast DL with SELDI-TOF MS offers a unique and powerful technique for the detection and monitoring of breast carcinoma. This method has the potential to enhance the diagnostic utility of conventional DL cytology. <<

Interesting, but perhaps shows more that cytologic analysis of DL isn't that great, rather than SELDI being a big help.

Regarding the testing modality, there are some isoforms that immunoassay doesn't detect well, but how big a factor that will be, I do not know.

Cheers, Tuck



To: Biomaven who wrote (326)8/7/2005 11:29:37 PM
From: tuck  Read Replies (1) | Respond to of 510
 
>>QIAGEN to Acquire Key Assets of LumiCyte, Inc.

Acquisition Adds Next-Generation, Nanotechnology-Based “On-Chip” Sample Preparation for MALDI-Mass Spectrometry

Venlo, The Netherlands, August 01, 2005 -- QIAGEN N.V. (NASDAQ: QGEN; Frankfurt, Prime Standard: QIA), the world's leading provider of pre-analytical sample preparation products enabling genetic and protein analysis, today announced that it has entered into a definitive agreement to acquire key assets of LumiCyte, Inc. (LCI). LCI has developed and recently initiated marketing of the first products based on its proprietary STS- (Surface Tension Segmented) Biochip™ sample preparation solution for MALDI (Matrix-Assisted Laser Desorption/Ionization)-Mass Spectrometry (MS). This novel sample preparation solution is compatible with today’s leading mass-spectrometry instruments. The STS-Biochip™ creates a new dimension of detection capabilities on such mass spectrometers by allowing samples, such as peptides and proteins, to be simultaneously separated into classes and concentrated “on-chip”. This capability dramatically increases the limits of detection achievable through mass spectroscopy.

The combination of the acquisition of key assets of LCI with the acquisition of the bioanalytical business of SuNyx GmbH (announced today in a separate press release) creates a complete, proprietary and technology-leading portfolio for QIAGEN in the rapidly growing market segment of sample preparation of proteins and peptides for analysis using MALDI-Mass Spectrometry. The LCI transaction brings to QIAGEN pre-analytical products for MALDI analysis, the SuNyX transaction brings to QIAGEN pre-analytical products for LC-MALDI analysis.

MALDI -Mass Spectrometry has become the most important analytical tool in the identification of proteins and evaluation of their role in biological processes in the areas of proteomics, drug discovery, and biomarker identification. Sample preparation is often the most crucial step in MALDI mass detection of peptides and proteins. For a successful MALDI mass measurement, analytes must be incorporated into UV-light-absorbing matrix crystals. In addition to often lacking a sufficient concentration of proteins to achieve high enough MS sensitivity, this process can be disturbed by contaminants such as detergents and salts. Therefore, the combination of efficient separation and concentration in a single step is a key and previously unmet need.

LCI has created a unique product portfolio which combines the separation and concentration of proteins and peptides from complex mixtures. Its proprietary approach includes utilizing a combination of surface chemistry with nanotechnology on a single mass spectrometry sample chip. Through this approach, large samples dry down through various affinity surfaces to a non-binding, molecularly flat analysis zone, resulting in an up to 1,000-fold increased sensitivity and reproducibility in MS applications. In addition, LCI has established an exceptional capability for producing surfaces with a variety of “on-chip” separation capabilities for different proteomics applications in research, drug discovery and diagnostics. For example, LCI’s expanding product portfolio includes surfaces for concentration, desalting and enrichment of post-translational modifications of proteins.

LCI’s STS-Biochip™ platform has an open architecture which enables the usage and significantly increases the detection capabilities of most major MS instruments available. The inherent flexibility in design and manufacturing of the STS-BiochipTM allows for rapid development of new products based on market demands.

“We have utilized LumiCyte’s STS chips with our high-end ABI mass spectrometers and have achieved dramatically better limits of detection. The results have been fantastic. Also, we are very excited about our recent results with STS affinity surfaces”, stated Professor Mark Baker, Chief Executive Officer of the Australian Proteome Analysis Facility (APAF) from Sydney, Australia.

QIAGEN believes that LCI’s sample preparation technologies and product portfolio represent a complementary addition to QIAGEN’s leading protein sample preparation portfolio and that this combination will create a unique offering for QIAGEN’s customers in academic and industrial research, as well as in molecular diagnostics.

Subject to the terms of the acquisition agreement, QIAGEN will pay approximately US$3 million cash up-front for of the key assets of LumiCyte, Inc. Additional considerations of approximately US$4 million and US$5 million will be paid after 18 and 30 months, respectively, subject to reaching certain financial targets. An additional milestone of US$ 4 million could be paid during the 60 months following the transaction upon reaching a significant financial target. In total, the cumulative consideration paid is expected to amount to less than 3x annual net sales of the acquired products during the first 18 months after the purchase, and thereafter, expected to represent a significantly lower and declining multiple of the annual net sales. QIAGEN anticipates that the transaction will add approximately US$2.0 million in net sales and will have a slightly dilutive impact of approximately US$0.5 million on QIAGEN's net income in 2006 and will be accretive thereafter. QIAGEN expects rapid growth of its products for sample preparation for MALDI mass spectrometry following their introduction in 2006. QIAGEN expects to provide further details on the acquisitions announced on August 1 in its upcoming conference call reporting the financial results of its second quarter 2005 on August 9, 2005.

"LCI’s on-chip sample preparation product portfolio for MALDI-MS fits perfectly with QIAGEN’s leadership in sample preparation for proteomics and generates exciting synergies with QIAGEN's current, leading technologies and products in protein sample preparation, including our Qproteome and QIAexpress product lines. Through this acquisition we are extending our sample preparation leadership into the rapidly growing area of sample preparation for MALDI-MS,” said Peer M. Schatz, QIAGEN's Chief Executive Officer.

“STS-Biochip™ is a powerful new platform for the analysis of proteins and protein fragments in a wide variety of biological pursuits”, said John D. D. Kohler, Chief Executive Officer of LumiCyte. “The basic design of STS is extensible to many affinity surfaces and will provide, by far, the broadest offering of affinity chemistries of any protein bio-chip on the market. We are very excited to team up with QIAGEN. As the market and technology leader in preanalytical solutions, QIAGEN is clearly the best partner to maximize the significant value of STS-Biochip™ technology as a preanalytical tool for MALDI mass spectrometry analysis.”<<

Having QGEN suck up Lumicyte and compete with Ciphergen is not good news, but . . .

Peter, I found something I posted here a while ago that sort of addresses the question about using ELISA for the ovarian test:

proteomesci.com

Full text freebie, and only a few pages of text.

Note that a truncated form of transthyretin is one of the three biomarkers in CIPH's test. Thoughts?

Cheers, Tuck