The Whey acidic protein four-disulfide core (WFDC) protein family consists of proteins with one or more WFDC domains which are ubiquitously expressed throughout the body of human and perform a wide range of functions, including antiprotease, antibacterial, and immunomodulatory functions. Aberrant expression of WFDC proteins is associated with human diseases. However, review on the WFDC protein family is limited and insufficient. Furthermore, a systematic summary of the underlying mechanisms of WFDC protein activity is lacking. In this review, we give a summary of the structural basis and molecular function of these proteins and review the immune regulatory mechanisms and signaling pathways of WFDC proteins in the development of certain diseases. Furthermore, we discuss the diagnostic and prognostic potential of multiple WFDC proteins in the aforementioned conditions, as well as their prospective use. At last, we also discuss the progress of WFDC protein in clinical trials and put forward some research difficulties and the directions of follow-up research. Our review highlights the functional diversity and clinical significance of WFDC proteins family, while providing potential targets for drug development and innovative therapeutic strategies, this review lays the foundation and direction for future research on WFDC proteins.
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| http://dx.doi.org/10.3389/fcell.2024.1459129 | DOI Listing |
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Despite 96 million years of evolution separating humans and rodents, 11 closely related reproductive tract-specific genes in humans-, , , , , , , , , , and -and the 13 reproductive tract-specific orthologous genes in mice, form highly conserved syntenic gene clusters indicative of conserved, combined critical functions. Further, despite significant progress toward a nonhormonal male contraceptive targeting the protein encoded by one of these genes, epididymal peptidase inhibitor (EPPIN), and associations found between mutations in and an increased risk of male infertility, neither EPPIN nor any closely related whey acidic protein four-disulfide core (WFDC) gene have been explored functionally. To clarify the involvement of WFDC genes in male fertility, we strategically used CRISPR/Cas9 to generate mice lacking 13, 10, 5, or 4 genes within the cluster and demonstrated that males with deletions of 13, 10, or 4 genes (Wfdc6a, Eppin, Wfdc8, and Wfdc6a) were sterile due to an arrest in spermatogenesis, preventing formation beyond round spermatids.
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