Skip to main content

Characterization of a folate receptor in parotid gland and a folate binding protein in saliva from humans: Epitope relatedness to human milk folate binding protein

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

The present study was performed to establish the antigenic identity and origin of the folate binding protein in human saliva. We identified a folate receptor in human parotid and submandibular gland which immunoreacted with antibodies against human milk folate binding protein, as evidenced by ELISA and immunostaining of ductal epithelium and secretory glandular material. The receptor concentration was 0.4–1.4 nmol 3 H-folate bound/g protein. Ligand binding was of a high-affinity (K=1010 M−1 ) type, exhibited positive cooperativity, a slow radioligand dissociation at pH 7.4, and inhibition by folate analogues. The concentration of immunoreactive folate binding protein in saliva as determined by ELISA with antibodies against human milk folate binding protein was several fold higher than that determined by radioligand binding (nil – 1 nM). This indicates that a major fraction of the immunoreactive material does not bind 3 H-folate, and could represent a precursor form of the protein. In conclusion, the folate binding protein in human saliva seems to be a secretory product of the salivary glands. The protein is also epitope-related to folate binding proteins in other human mucosal secretions.

Keywords: Folate receptor; epitope-relatedness to human milk folate binding protein; human salivary glands; salivary folate binding protein

Document Type: Original Article

DOI: http://dx.doi.org/10.1034/j.1600-0463.2000.d01-91.x

Affiliations: 1: Department of Clinical Chemistry, Herning Hospital, Herning, 2: Department of Clinical Chemistry, Hillerød Hospital, Hillerød, 3: Laboratory for Autoimmune Serology, Statens Serum Institute, Copenhagen 4: Genetics and Laboratory Medicine, Corporate Plaza, Atlanta, Georgia, USA

Publication date: July 1, 2000

mksg/apm/2000/00000108/F0020007/art00013
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more