Effects of calcitonin and ultimobranchialectomy (UBX) on calcium and bone metabolism in the eel,Anguilla anguilla L.

Lopez, Évelyne; Peignoux-Deville, J.; Lallier, F.; Martelly, E.; Milet, Christian

doi:10.1007/bf02546406

Cited by 70 publications

(31 citation statements)

References 23 publications

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“…Calcitonin-induced short-duration reduction in plasma calcium levels in carp is in full agreement with earlier observations with some fresh water teleosts (Chan et al, 1968;Lopez et al, 1976;Wendelaar-Bonga, 1981;Chakraborti and Mukherjee 1993;Srivastava et al, 1998;Mukherjee et al, 2004a, b), marine bony fish (Glowacki et al, 1985) and elasmobranch Dasyatis akajei (Srivastava et al, 1998). Ultimobranchial gland of fish is a rich source of CT.…”

Section: Discussionsupporting

confidence: 91%

“…CT has been extracted and purified from ultimobranchial gland of many fish (Niall et al, 1969;Noda and Narita, 1976;Ukawa et al, 1991;Sasayama et al, 1993). Several laboratories although have been able to show the hypocalcemic action of CT in fish (Chan et al, 1968;Lopez et al, 1976;Wendelaar-Bonga, 1981;Chakraborti and Mukherjee 1993;Srivastava et al, 1998;Suzuki et al, 1999), conflicting results are often reported (WendelaarBonga and Pang 1991;Singh and Srivastava 1993). Calcitonin producing C cells in ultimobranchial gland of fish showed less distinct responses to changes in extracellular calcium levels than mammals (Ross et al, 1974).…”

Section: Introductionmentioning

confidence: 99%

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Calcitonin Functions Both as a Hypocalcemic Hormone and Stimulator of Steroid Production and Oocyte Maturation in Ovarian Follicles of Common Carp, Cyprinus carpio

Mukherjee¹,

Kundu²,

Pramanick³

et al. 2011

Update on Mechanisms of Hormone Action - Focus on Metabolism, Growth and Reproduction

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Calcitonin Functions Both as a Hypocalcemic Hormone and Stimulator of Steroid Production and Oocyte Maturation in Ovarian Follicles of Common Carp, Cyprinus carpio

Mukherjee¹,

Kundu²,

Pramanick³

et al. 2011

Update on Mechanisms of Hormone Action - Focus on Metabolism, Growth and Reproduction

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“…Parathyroids have not been described in fish (i) but two glands are principally involved in their phosphocalcic met~olism : tile ultimobranchial body secreting calcitonin ; and tile Stannius corpuscles, hypocalcaemic glands sltuated on the kidney (2), which act with calcitonin at the sJ te of the gills (3,4) and bonc (5,6) to ma<ntain calcium homeostasis. However, we generally forget that fish liver is extremely rich in vitamin D 3 and very little is known of tile function of the vitamin in these animals.…”

Section: Introductionmentioning

confidence: 99%

Paradoxical effect of 1.25 dihydroxycholecalciferol on osteoblastic and osteoclastic activity in the skeleton of the eelAnguilla anguilla L

et al. 1980

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Female mature eels (300 to 500 g) received one intraperitoneal injection of 1.25(OH)2D3 (10 microgram). Their vertebral bone was compared, 8 h and 24 h after the injection, with vertebral bone of control mature female eels receiving solvent alone (ethanol). Sexual maturation in female eels induces a bone decalcification with hypercalcaemia and hyperphosphataemia. The control eels showed marked osteoclastic resorption and osteocytic osteolysis and the degree of mineralization of the intercellular substance decreased. Injection of 1.25 (OH)2D3 into these female mature eels provoked as early as 8 h: 1) an increase in hypercalcaemia and hyperphosphataemia; 2) a major conversion of lining cells to osteoblasts and a stimulation of osteoblastic activity with new bone formation; 3) diminished osteoclastic resorption without changing osteocytic osteolysis or bone matrix mineralization.

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“…Osteocytes in fishes are believed to be functionally similar to mammalian osteocytes and to participate in periosteocytic osteolysis (Baud 1968(Baud , 1977Lopez 1970;Tonna 1972;Lopez et al 1976;Baud and Boivin 1978). However, this concept of bone resorption has been seriously questioned (Parfitt 1977(Parfitt , 1990Boyde 1981;Cant et al 1982;Marotti 1990).…”

Section: Introductionmentioning

confidence: 99%

Histological identification of osteocytes in the allegedly acellular bone of the sea breams Acanthopagrus australis, Pagrus auratus and Rhabdosargus sarba (Sparidae, Perciformes, Teleostei)

1994

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The bone of advanced teleost fishes such as those of the family Sparidae is said to lack osteocytes or to be acellular. Acellularity has been determined by apparent lack of osteocyte lacunae. This study questions the validity of this criterion. Scanning electron and light microscopy of paraffin and resin sections were used to show that the sides of sea bream mandibles consist of laminar parallel-fibred bone that we call tubular bone, because it contains tubules, and localised regions of Sharpey fibre bone. Osteocytes lie along the walls of tubules that also contain collagen fibril bundles (T-fibres), or in the lumens of tubules that do not contain T-fibres. We show that the osteocytes are derived from osteoblasts. The T-fibre system is different from other fibre systems that have been described. The tubules enclose wide T-fibres (lenticular in cross-section, maximum width about 8 microns) that taper at their ends and continue as thin T-fibres (round in cross-section, about 2 microns wide). The T-fibres originate in the periosteum. In mature tubular bone, spaces of increasing size develop around the osteocytes. Osteocytes are released from the bone matrix and become postosteocytes or bone-lining cells. Secondary bone lines the largest spaces. In Sharpey fibre bone, small osteocytes in small lacunae (about 2 microns wide) are found in columns parallel to the Sharpey fibres. Large osteocytes are found in large round spaces and are much larger than comparable osteocytes in lacunae in the bone of the salmon Salmo salar. We conclude that an absence of visible or conventional osteocyte lacunae does not mean that the cells themselves are absent. There are cells and two types of collagen fibre bundle in the tubules. The cells are osteocytes derived from osteoblasts, and these osteocytes apparently resorb bone with the result that large amounts of bone are destroyed. "Acellular" tubular and Sharpey fibre bone are types of cellular bone that differ from each other and from conventional cellular bone.

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Effects of calcitonin and ultimobranchialectomy (UBX) on calcium and bone metabolism in the eel,Anguilla anguilla L.

Cited by 70 publications

References 23 publications

Calcitonin Functions Both as a Hypocalcemic Hormone and Stimulator of Steroid Production and Oocyte Maturation in Ovarian Follicles of Common Carp, Cyprinus carpio

Calcitonin Functions Both as a Hypocalcemic Hormone and Stimulator of Steroid Production and Oocyte Maturation in Ovarian Follicles of Common Carp, Cyprinus carpio

Paradoxical effect of 1.25 dihydroxycholecalciferol on osteoblastic and osteoclastic activity in the skeleton of the eelAnguilla anguilla L

Histological identification of osteocytes in the allegedly acellular bone of the sea breams Acanthopagrus australis, Pagrus auratus and Rhabdosargus sarba (Sparidae, Perciformes, Teleostei)

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