Ontogeny of Amniote Fetal Membranes and Their Application to Phylogeny

Luckett, W. Patrick

doi:10.1007/978-1-4684-8851-7_16

Cited by 109 publications

(66 citation statements)

References 39 publications

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“…Our observations also suggest that the isolated yolk mass does not regress in late gestation, unlike in many squamates (Hoffman, 1970;Yaron, 1985;Blackburn, 1993b). As in other species (Boyd, 1942;Ibrahim, 1977;Luckett, 1977b;Stewart, 1985;Blackburn, 1993b;Stewart and Thompson, 1994) the yolk cleft does not become confluent with the extraembryonic coelom in Chalcides ocellatus tiligugu and hence is never penetrated by the allantois. Likewise, because the allantois is excluded from the yolk cleft, an omphalallantoic placenta does not form.…”

Section: Discussionsupporting

confidence: 57%

Uterine morphology during the annual cycle inChalcides ocellatus tiligugu (Gmelin) (Squamata: Scincidae)

Corso

Delitala

Carcupino

2000

Journal of Morphology

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Section: Discussionsupporting

confidence: 57%

Uterine morphology during the annual cycle inChalcides ocellatus tiligugu (Gmelin) (Squamata: Scincidae)

Corso

Delitala

Carcupino

2000

Journal of Morphology

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“…Viviparous skinks and some mammals (e.g., ungulates) have an epitheliochorial placenta (Luckett, 1977). Epitheliochorial placentation involves close apposition of fetal and maternal tissue, but there is no breaching of the uterine epithelial layer (Grosser, 1927;Amoroso, 1952;Friess et al, 1980).…”

mentioning

confidence: 99%

Claudin‐5 is Restricted to the Tight Junction Region of Uterine Epithelial Cells in the Uterus of Pregnant/Gravid Squamate Reptiles

Biazik

Thompson

Murphy

2008

The Anatomical Record

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Claudin-5, a tight junctional protein associated with ion and size selectivity, has been found in the uterus of skinks. This study has generated critical information about the molecular assembly of the tight junction at various stages of the reproductive cycle in the skink uterus. Recent studies looking at tight junctional proteins found occludin expression in the tight junction region of uterine epithelial cells in the skink uterus; however, occludin did not disclose any further information about the ions and size of ions permeating across the paracellular pathway. A 22-kDa claudin-5 band was detected in the uterus of the skinks present in this study and immunohistochemistry revealed that claudin-5 redistributes to the tight junction region of the lateral plasma membrane of uterine epithelial cells in late stage pregnancy/gravidity. This finding indicates that the tight junction becomes more assembled to precisely regulate ion and solute permeation in late stage pregnancy/gravidity. Claudin-5 with its functional role as a molecular sieve due to the formation of ion and size selective pores suggests that permeation of ions smaller than 0.8 kDa are restricted when claudin-5 is redistributed to the tight junction region of the later plasma membrane. This report is the first description of the molecular mechanisms that may be involved in regulating nutrient provision in the reptilian uterus.

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“…The first allies rodents with primates (McKenna, 1961), and the second is the classical rodent-lagomorph relationship, at the basis of the concept Glires since the earliest classifications of mammals (for example Gregory, 1910). This latter hypothesis quickly became the prevailing one as more data and synapomorphic characters accumulated Luckett, 1977;Novacek, 1985).…”

Section: Advantages Drawbacks and Progress Of Molecular Datamentioning

confidence: 99%