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  • 2005-2009
  • 1995-1999  (2)
  • Accelerated proliferation  (1)
  • Atomic force microscopy  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European biophysics journal 27 (1998), S. 63-68 
    ISSN: 1432-1017
    Keywords: Key words DNA ; Enzyme activity ; Atomic force microscopy ; Exonuclease ; BAL 31 nuclease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract We have applied atomic force microscopy (AFM) to the measurement of BAL 31 nuclease activities. BAL 31 nuclease, a species of exonuclease, is used to remove unwanted sequences from the termini of DNA before cloning. For cutting out only the appropriate sequences, it is important to know the nuclease properties, such as digestion speed and the distribution of the lengths of the digested DNA. AFM was used to obtain accurate measurements on the lengths of DNA fragments before and after BAL 31 nuclease digestion. We analyzed 4 DNAs with known number of base pairs (288, 778, 1818, and 3162 base pairs) for correlating the contour length measured by AFM with the number of base pairs under the deposition conditions used. We used this calibration for analyzing DNA degradation by BAL 31 nuclease from the AFM measurement of contour lengths of digested DNAs. In addition, the distribution of digested DNA could be analyzed in more detail by AFM than by electrophoresis, because digested DNA were measured as a population by electrophoresis, but were measured individually by AFM. These results show that AFM will be a useful new technique for measuring nuclease activities.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1437-7772
    Keywords: Stage III non-small cell lung cancer ; CDDP ; VP-16 ; Conventional radiotherapy ; Concurrent chemoand radiotherapy ; Accelerated proliferation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background. This study was designed to evaluate the feasibility and efficiency of giving cisplatin, etoposide, and OK432 concurrently with conventional radiotherapy (RTx) for patient's with inoperable stage III, based on the TNM classification according to the International Union against Cancer staging system for lung cancer (1987) non-small cell lung cancer (NSCLC). Methods. From January 1992 to December 1994,31 patients with cytologically or histologically confirmed stage III NSCLC were treated with RTx, to a total dose of 56–64 Gy, with concurrent daily oral administration of etoposide (25mg) and cisplatin (20mg) for 5 days during the third or fourth week from the start of RTx. The subcutaneous injection of 1 or 2 KE of OK-432, three times a week, for the duration of radiotherapy also started from the beginning of RTx. Results. The number of eligible patients was 29 (26 men and 3 women). Their mean age was 66 years (range, 55–77 years). Six patients had an Eastern Cooperative Oncology Group performance status (PS) of 0; 15, 1; 8; 2. Three were stage IIIA, and 26, stage ITIB. Histologically, 2 had adenocarcinoma, 23, squamous cell carcinoma, and 4, large cell carcinoma. In 27 of the 29 patients, the RTx schedule was completed. There were no treatment-related deaths. Grade 4 toxicity (according to World Health Organisation criteria) leukopenia (700/μl was observed in 1 patient. The response rate was 79% and the median survival was 17 months. Survival rates at 1, 2 and 3 years were 62%, 31%, and 21%, respectively. The local failure rate was 51%. Conclusion. The combination of cisplatin, etoposide, and K-432, given concurrently with conventional RTx is feasible and effective for inoperable stage III NSCLC.
    Type of Medium: Electronic Resource
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