Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving virus or bacteriophage
Reexamination Certificate
2001-04-12
2002-02-05
Salimi, Ali R. (Department: 1648)
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving virus or bacteriophage
C435S091100, C435S091330, C424S204100, C536S023720, C536S023100, C930S220000
Reexamination Certificate
active
06344314
ABSTRACT:
The invention pertains to determined DNA sequences derived from a papillomavirus genome, more particularly DNA recombinants, including vectors, modified by such DNA sequences in such manner that, when said DNA recombinants are introduced in suitable host cells in which said DNA recombinants can be replicated, the said DNA sequences can be expressed in the form of the corresponding proteins. The invention further relates to the proteins themselves, which can be purified and used for the production of immunogenic compositions.
The invention pertains more particularly to DNA products of the papillomavirus designated as IP-2 (now redesignated as HPV-33) in the European patent application filed under number 85.402362.9 on Nov. 29, 1985, the contents of which are incorporated herein by reference. A plasmid containing the DNA of said virus has been deposited at the CNCM (“Collection nationale de Culture de Micro-Organismes” of the Pasteur Institute of Paris) under number I-450.
Papillomaviruses are members of the papovavirus family and possess a genome of about 7,900 base pairs (bp) consisting of a covalently closed circular DNA molecule. Human papilloma viruses (HPV) are classified on the basis of their DNA sequence homology (6) and nearly 40 types have now been described. Considerable insight into HPV biology and their involvement in human disease has been attained by the application of the techniques of molecular biology. A possible role for HPVs in human cancer was suspected following the detection of HPV DNA in tumors resulting from the malignant conversion of genital warts (33). The cloning of two HPV genomes, HPV-16 and HPV-18 (3, 11) from cervical carcinomas has further stimulated research in this field of immense socio-economic importance. These viruses were discovered in more than 70% of the malignant genital tumors examined and in many others HPV-16 related sequences were detected (3, 16, 33). Amongst these is HPV-33 which was recently cloned from an invasive cervical carcinoma using HPV-16 as a probe under conditions of reduced stringency (1). In the present study we have determined the DNA sequence of HPV-33 and describe its relationship to HPV-16. Among the papillomaviruses HPV-33 is unique as it possesses a 78 bp tandem repeat which strongly resembles the enhancer of SV40 (4, 14).
The invention stems from the cloning strategy disclosed hereafter of the genome of HPV-33 which enabled particular DNA sequences to be identified, more particularly those providing hybridization probes, particularly useful for the detection of DNA of papillomaviruses related to HPV-33 in human tissue, whereby positive responses can be related to the possible development in the host of invasive cervical carcinomas.
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Cole Stewart
Streeck Rolf E.
Institut Pasteur
Salimi Ali R.
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