Protein tyrosine kinase 7 is essential for tubular morphogenesis of the Wolffian duct

Xu, Bingfang; Washington, Angela M.; Domeniconi, Raquel Fantin; Souza, Ana Cláudia Ferreira; Lu, Xiaowei; Sutherland, Ann; Hinton, Barry T.

doi:10.1016/j.ydbio.2016.02.029

Cited by 34 publications

(36 citation statements)

References 39 publications

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“…As is the case in other systems (Pfister et al, 2016;Simões Sde et al, 2014;Xu et al, 2016), both cellular intercalation at the luminal surface and cellular migration of cell bodies is dependent on MyoII. Previous work had demonstrated inhibition of cochlear cellular intercalation and junctional remodeling in response to either pharmacological or genetic inhibition of MyoII (Yamamoto et al, 2009).…”

Section: Discussionmentioning

confidence: 71%

Cell migration, intercalation and growth regulate mammalian cochlear extension

2017

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Developmental remodeling of the sensory epithelium of the cochlea is required for the formation of an elongated, tonotopically organized auditory organ, but the cellular processes that mediate these events are largely unknown. We used both morphological assessments of cellular rearrangements and time-lapse imaging to visualize cochlear remodeling in mouse. Analysis of cell redistribution showed that the cochlea extends through a combination of radial intercalation and cell growth. Live imaging demonstrated that concomitant cellular intercalation results in a brief period of epithelial convergence, although subsequent changes in cell size lead to medial-lateral spreading. Supporting cells, which retain contact with the basement membrane, exhibit biased protrusive activity and directed movement along the axis of extension. By contrast, hair cells lose contact with the basement membrane, but contribute to continued outgrowth through increased cell size. Regulation of cellular protrusions, movement and intercalation within the cochlea all require myosin II. These results establish, for the first time, many of the cellular processes that drive the distribution of sensory cells along the tonotopic axis of the cochlea.

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Section: Discussionmentioning

confidence: 71%

Cell migration, intercalation and growth regulate mammalian cochlear extension

2017

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“…PTK7 is an acknowledged regulator of vertebrate PCP and, as such, is involved in various morphogenetic processes (Hayes et al, 2013;Podleschny et al, 2015;Shnitsar and Borchers, 2008;Williams et al, 2014;Xu et al, 2016;Yen et al, 2009). Concerning the functional relevance of the canonical Wnt-mediated endocytosis of PTK7, this could be a mechanism by which a Wnt gradient affects PTK7 localization.…”

Section: Discussionmentioning

confidence: 99%

PTK7 localization and protein stability is affected by canonical Wnt ligands

Berger

Breuer

Peradziryi

et al. 2017

Journal of Cell Science

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Protein tyrosine kinase 7 (PTK7) is an evolutionarily conserved transmembrane receptor with important roles in embryonic development and disease. Originally identified as a gene upregulated in colon cancer, it was later shown to regulate planar cell polarity (PCP) and directional cell movement. PTK7 is a Wnt co-receptor; however, its role in Wnt signaling remains controversial. Here, we find evidence that places PTK7 at the intersection of canonical and non-canonical Wnt signaling pathways. In presence of canonical Wnt ligands PTK7 is subject to caveolin-mediated endocytosis, while it is unaffected by non-canonical Wnt ligands. PTK7 endocytosis is dependent on the presence of the PTK7 co-receptor Fz7 (also known as Fzd7) and results in lysosomal degradation of PTK7. As we previously observed that PTK7 activates non-canonical PCP Wnt signaling but inhibits canonical Wnt signaling, our data suggest a mutual inhibition of canonical and PTK7 Wnt signaling. PTK7 likely suppresses canonical Wnt signaling by binding canonical Wnt ligands thereby preventing their interaction with Wnt receptors that would otherwise support canonical Wnt signaling. Conversely, if canonical Wnt proteins interact with the PTK7 receptor, they induce its internalization and degradation.

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“…Once the joining/fusion is complete, the renal vesicle then forms the characteristic J‐/S‐shaped tubules. Therefore, one can hypothesize that a signal promotes the migration of the cells from the renal vesicle toward the Wolffian duct, and elongation may occur via cell proliferation and cell intercalation similar to that observed during Wolffian duct elongation (Xu et al ., ). Interestingly, the epithelium of the short distal region of the mesonephric tubule is similar to that seen in the Wolffian duct (see review by Sainio, ).…”

Section: ‘Connect With Me’ Says the Wolffian Duct To The Efferent Ductsmentioning

confidence: 97%

We, the developing rete testis, efferent ducts, and Wolffian duct, all hereby agree that we need to connect

Santos

Hinton

2019

Andrology

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Background:The mechanisms by which the rete testis joins the efferent ducts, which joins the Wolffian duct during development, are not known. Mouse and chick models have been helpful in identifying genes that are important for the development of each part, but genes have not been identified as to those that play a role in the joining of each part. Clinical implications of the failure of the male reproductive tract to form a fully functional conduit for spermatozoa are not trivial. Epididymal disjunction, the failure of the efferent ducts to join the testis, is one of several epididymal anomalies that have been observed in some boys who were cryptorchid at birth. Objective: A systematic review of studies focusing on the morphogenesis of the mesonephric duct and mesonephric tubules in different species, and identification of clinical issues should there be failure of these tissues to develop. Design: PubMed and GUDMAP databases, and review of books on kidney development were searched for studies reporting on the mechanisms of morphogenesis of the kidney and epididymis. Main outcomes measure(s): Gaps in our knowledge were identified, and hypotheses coupled with suggestions for future experiments were presented. Results: A total of 64 papers were identified as relevant, of which 53 were original research articles and 11 were book chapters and reviews covering morphogenesis and clinical issues. Investigators utilized multiple species including, human, mouse, chick, Xenopus, bovine, and sheep. Conclusion: Fundamental understanding of the morphogenesis of the male reproductive tract is limited, especially the morphogenesis of the rete testis and efferent ducts. Therefore, it is not surprising that we do not understand how each part unites to form a whole. Only one mechanism of joining of one part of the tract to another was identified: the joining of the Wolffian duct to the cloaca via controlled apoptosis.

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Protein tyrosine kinase 7 is essential for tubular morphogenesis of the Wolffian duct

Cited by 34 publications

References 39 publications

Cell migration, intercalation and growth regulate mammalian cochlear extension

Cell migration, intercalation and growth regulate mammalian cochlear extension

PTK7 localization and protein stability is affected by canonical Wnt ligands

We, the developing rete testis, efferent ducts, and Wolffian duct, all hereby agree that we need to connect

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