NDLI: Cloning and Expression of a DNA Sequence Encoding a 41-Kilodalton Cryptosporidium parvum Oocyst Wall Protein

Content Provider	PubMed Central
Author	Jenkins, Mark C. Trout, Jim Murphy, Charles Harp, James A. Higgins, Jim Wergin, William Fayer, Ron
Copyright Year	1999
Abstract	This study was conducted to produce a recombinant species-specific oocyst wall protein of Cryptosporidium parvum. Antigens unique to C. parvum were identified by gradient sodium dodecyl sulfate-polyacrylamide gel electrophoresis and immunoblotting of oocyst proteins from several different Cryptosporidium species. Antiserum was then prepared against a 41-kDa antigen unique to C. parvum and used to identify a recombinant DNA clone, designated rCP41. Expression of CP41 mRNA in C. parvum oocysts was confirmed by reverse transcriptase PCR (RT-PCR). Although the CP41 sequence was shown by PCR to be present in the genome of C. baileyi, CP41 mRNA was not detected in this species by RT-PCR. Immunofluorescence staining with antiserum against recombinant CP41 detected native CP41 antigen on the surface of C. parvum oocysts but failed to detect CP41 on C. baileyi oocysts. Immunoelectron microscopy demonstrated that native CP41 was distributed unevenly on the C. parvum oocyst surface and was associated with amorphous oocyst wall material. In an enzyme-linked immunosorbent assay, purified rCP41 performed as well as native C. parvum oocyst protein in measuring the serological responses of young calves and adult cows to experimental and natural C. parvum infections. These results indicate that recombinant CP41 antigen may have potential in the immunodiagnosis of cryptosporidiosis.
Starting Page	912
File Format	PDF
ISSN	10986588
e-ISSN	10986588
Journal	Clinical and Diagnostic Laboratory Immunology
Issue Number	6
Volume Number	6
Language	English
Publisher	American Society for Microbiology
Publisher Date	1999-11-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Immunology and Allergy Clinical Biochemistry Immunology Microbiology (medical)

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