The fine structure of lamprey epidermis. I. Introduction and mucous cells

Downing, Stephen W.; Novales, Ronald R.

doi:10.1016/s0022-5320(71)80158-2

Cited by 42 publications

(22 citation statements)

References 21 publications

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“…The general structure of the epidermis observed in P . marinus coincides with previous studies (Downing & Novales, 1971 a , b , c ; Lethbridge & Potter, , ). Some differences in the morphology and thickness, however, have been observed when comparing the epidermis of Lampetra fluviatilis (L. 1758) and P .…”

Section: Discussionsupporting

confidence: 93%

“…This study shows marked differences in epidermal cell types compared with myxinids (Blackstad, ; Spitzer & Koch, ) and teleosts (Elliott, 2000 b ), but a general structural similarity to that reported for other petromyzontids (Downing & Novales, 1971 a , b , c ; Lane & Whitear, ; Lethbridge & Potter, , ; Sato, ). The epidermal epithelium of the skin of P .…”

Section: Discussionsupporting

confidence: 71%

“…marinus . Later on, structural and ultrastructural studies (Pfeiffer & Pletcher, ; Downing & Novales, 1971 a , b , c ) confirmed the presence of the three basic cell types of Ficalbi. Based on those studies, the club cells were renamed as skein cells by Lane & Whitear () because, according to these authors, they could no longer be considered homologous to the club cells of the teleostean epidermis.…”

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

“…Mucous cells are the smallest and most numerous cells in the lamprey epidermis (Downing & Novales, 1971 a ). In adult lampreys, they are arranged in layers from the basal to the apical surface of the epidermis, adopting different cytological characteristics depending on their location: basal, mid and superficial epidermis (Downing & Novales, 1971 a ; Sato, ). In the epidermis of lampreys there are no goblet cells and their main function in these animals is instead supplied by mucous cells, also called epithelial cells (Downing & Novales, 1971 a ; Whitear, ; Elliott, 2000 b ).…”

Section: Introductionmentioning

confidence: 99%

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Morphological and functional aspects of the epidermis of the sea lamprey Petromyzon marinus throughout development

Rodríguez-Alonso

Megı́as

Pombal

et al. 2017

Journal of Fish Biology

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The development of the epidermis of sea lamprey Petromyzon marinus along the whole life cycle was studied using conventional staining techniques and lectin histochemistry. The epidermis undergoes variations in morphology and thickness throughout development. The simple cuboidal epithelium found in the epidermis of prolarvae becomes stratified cubic in the adult by increasing the number of cell layers. The cuticle thickness undergoes a steady increase during the larval period. There are changes in the glycoconjugate composition of the three main cell types of the P. marinus epidermis, mucous, granular and skein cells, which are more pronounced after metamorphosis. The Alcian blue-periodic acid Schiff (AB-PAS) histochemical method shows the presence of both acidic and neutral glycoconjugates in the mucous cells, indicating their secretory function. Moreover, lectin analysis reveals a mucous secretion containing glycoconjugates such as sulphated glycosaminoglycans (N-acetylglucosamine and N-acetylgalactosamine) and N-glycoproteins rich in mannose. Although granular cells are AB-PAS negative, they exhibit a similar glycoconjugate composition to the mucous cells. Moreover, granular cells show sialic acid positivity in larvae but this monosaccharide residue is not detected after metamorphosis. The skein cells, a unique cell of lampreys, are negative to AB-PAS staining but they mostly contain l-fucose and sialic acid residues, which also disappear after metamorphosis. The function of the granular and skein cells is still unknown but the role of their glycoconjugate composition is discussed. In addition, a different cellular origin is suggested for these two types of cells.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphological and functional aspects of the epidermis of the sea lamprey Petromyzon marinus throughout development

Rodríguez-Alonso

Megı́as

Pombal

et al. 2017

Journal of Fish Biology

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Iron deposition in the integument of lampreys

Youson

Sargent

1984

Anat. Rec.

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The integument of larval, parasitic adult, and upstream-migrant lampreys (Petromyzon marinus) was examined for iron deposition using light microscopic histochemistry and routine and histochemical procedures in the electron microscope. Ferritin particles, representing ferric iron, are present throughout most of the cytoplasmic matrix and within dense granules and vacuoles of epidermal mucous cells, but are not located in skein or granular cells. These particles are abundant in mucous cells of the dorsal surface but not the ventral surface and are more concentrated in adult lampreys compared to larva. Histochemistry revealed only sparse amounts of ferrous iron. Iron is not present in the dermis but is found in adipocytes of a subcutaneous layer. The deposition of integumentary iron is discussed with reference to body pigmentation and excretion of this metal.

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Comparison of vertebrate skin structure at class level: A review

Akat

Yenmiş

Pombal

et al. 2022

The Anatomical Record

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The skin is a barrier between the internal and external environment of an organism. Depending on the species, it participates in multiple functions. The skin is the organ that holds the body together, covers and protects it, and provides communication with its environment. It is also the body's primary line of defense, especially for anamniotes. All vertebrates have multilayered skin composed of three main layers: the epidermis, the dermis, and the hypodermis. The vital mission of the integument in aquatic vertebrates is mucus secretion. Cornification began in apmhibians, improved in reptilians, and endured in avian and mammalian epidermis. The feather, the most ostentatious and functional structure of avian skin, evolved in the Mesozoic period. After the extinction of the dinosaurs, birds continued to diversify, followed by the enlargement, expansion, and diversification of mammals, which brings us to the most complicated skin organization of mammals with differing glands, cells, physiological pathways, and the evolution of hair. Throughout these radical changes, some features were preserved among classes such as basic dermal structure, pigment cell types, basic coloration genetics, and similar sensory features, which enable us to track the evolutionary path. The structural and physiological properties of the skin in all classes of vertebrates are presented. The purpose of this review is to go all the way back to the agnathans and follow the path step by step up to mammals to provide a comparative large and updated survey about vertebrate skin in terms of morphology, physiology, genetics, ecology, and immunology.

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The fine structure of lamprey epidermis. I. Introduction and mucous cells

Cited by 42 publications

References 21 publications

Morphological and functional aspects of the epidermis of the sea lamprey Petromyzon marinus throughout development

Morphological and functional aspects of the epidermis of the sea lamprey Petromyzon marinus throughout development

Iron deposition in the integument of lampreys

Comparison of vertebrate skin structure at class level: A review

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