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Eggs produced by mature females are responsible for the disease\u2019s occurrence and spread. <jats:italic>Frzb2<\/jats:italic>, a secreted frizzled-related protein, can inhibit Wnt signalling by competitive binding to the specific frizzled protein receptor. In this study, the complete gene sequence of <jats:italic>SjFrzb2<\/jats:italic> was obtained by using 3\u2032-rapid amplification of cDNA ends technology. <jats:italic>SjFrzb2<\/jats:italic> transcript levels at different stages of <jats:italic>S. japonicum<\/jats:italic> maturation were evaluated by quantitative real-time RT-PCR analysis. <jats:italic>SjFrzb2<\/jats:italic> was expressed at all developmental stages examined and exhibited the highest transcription level in 7-day-old worms, then gradually decreased during the growth and developmental stages to reach the lowest level at 18\u00a0days post-infection. <jats:italic>SjFrzb2<\/jats:italic> gene expression was higher in female worms than in male worms and was significantly higher in female worms from a single-sex infection than in female worms from a bisexual infection. The functions of <jats:italic>SjFrzb2<\/jats:italic> were explored via a small interfering RNA-based gene silencing approach and the soaking method. The results showed that <jats:italic>SjFrzb2<\/jats:italic> gene knockdown impaired the growth and development of <jats:italic>S. japonicum<\/jats:italic> in mice, affecting not only the survival and morphological structure of the worms but also their reproductive ability and the viability of the produced eggs. Collectively, these observations imply that Frzb2 may be a novel target for the development of immuno- and\/or small molecule-based therapeutics to control schistosomiasis fecundity and transmission.<\/jats:p>","DOI":"10.1186\/s13567-019-0716-1","type":"journal-article","created":{"date-parts":[[2019,12,11]],"date-time":"2019-12-11T15:04:53Z","timestamp":1576076693000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Functional analysis of the Frzb2 gene in Schistosoma japonicum"],"prefix":"10.1186","volume":"50","author":[{"given":"Guifeng","family":"Cheng","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaochun","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fanglin","family":"Qin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rong","family":"Xu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuanyuan","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinming","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shaopeng","family":"Gu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4480-2211","authenticated-orcid":false,"given":"Yamei","family":"Jin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2019,12,11]]},"reference":[{"key":"716_CR1","doi-asserted-by":"publisher","first-page":"411","DOI":"10.1016\/S1473-3099(06)70521-7","volume":"6","author":"P Steinmann","year":"2006","unstructured":"Steinmann P, Keiser J, Bos R, Tanner M, Utzinger J (2006) Schistosomiasis and water resources development: systematic review, meta-analysis, and estimates of people at risk. 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