On the presence of pigment cells in the interstitium of the testes of some indian birds

Dominic, C. J.; Ramamurthy, Priya

doi:10.1007/bf00621141

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…This is particularly the case in the quail (Coturnix coturnix japonica). In certain avian species, pigmentation is also exhibited in gonads (Saxicoloides fulicata, and Bubulcus ibis, studied by Dominic and Ramamurthy, 1962; Tertrao urogallus, and Lyrurus tetrix as reported by Stieve, 1931). In mammals, extracutaneous pigmentation is extremely rare.…”

Section: Introductionmentioning

confidence: 73%

Growth of Neural Crest Cells In Vitro Is Enhanced By Extracts From Silky Fowl Embryonic Tissues

Lecoin

Mercier

Douarin

1994

Pigment Cell Research

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In the Silky Fowl (SF) breed of chicken, most of the internal organs are infiltrated with melanocytes. Previous studies have shown that this generalized mesodermal pigmentation is not due to a cell autonomous abnormality of the melanocytes but to environmental factors able to promote both the homing of pigment cell precursors in abnormal embryonic sites and their proliferation and differentiation. To analyse the mode of these environmental cues, we tested the effect of SF embryo extract (SFEE) on cultured quail neural crest cells as compared with that of EE from normal chickens of the JA57 strain (JA57EE). We found that SFEE enhances crest cell proliferation as judged by 3H-TdR incorporation and cell counting. In contrast, no effect of SFEE was observed either on the proportion of cultured cells that are engaged into the melanocytic differentiation pathway or on the amount of melanin produced by each differentiated pigment cell. The simple observation, however, reveals that SFEE has a significant effect on pigmentation of the cultured quail neural crest cells. This effect has therefore to be accounted for by the general increase in cell number induced by SFEE. The question is raised as to whether the in vivo SF phenotype is generated exclusively by this mechanism.

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Section: Introductionmentioning

confidence: 73%

Growth of Neural Crest Cells In Vitro Is Enhanced By Extracts From Silky Fowl Embryonic Tissues

Lecoin

Mercier

Douarin

1994

Pigment Cell Research

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“…In the macroscopic observation, several cephalic tissues, such as viscero-and neurocranium, connective tissue, and peripheral nerves, were pigmented as to gonads is not unique to SF; pigmentation in gonads has also been observed in quail (Coturnix coturnix japonica) [5], Saxicoloides fulicata and Bubulcus ibis [3], Tetrao urogallus and Lyrurus tetrix [19]. The pigment expression was also observed in other specific organs of SF chicken, and apparently the internal hyperpigmentation does not occur at random, which suggests that the SF melanocytes are distributed in a tissue-and organ-specific manner.…”

Section: Discussionmentioning

confidence: 91%

Molecular Characteristics and Site Specific Distribution of the Pigment of the Silky Fowl.

et al. 2000

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ABSTRACT. Silky fowl, a breed of chicken, is hyperpigmented in its various internal tissues. The pigment was extracted from various tissues of two strains of Silky fowl to determine its molecular structure and internal distribution. Analysis by infrared spectroscopy showed two spectrum patterns of the pigment in Silky fowl; one is from ovary and testis, the other is from periosteum and feather. The difference between the two spectra is possibly due to the sulfur contents of melanin. Especially, the spectra of the pigments from feather and periosteum shared the characteristics of synthesized melanin spectrum in common, which indicates that the melanocytes dispersed in these tissues were functionally the same. According to our quantitative analysis, the tissues examined were classified significantly in the order of the pigment content (p<0.05): periosteum > gonads (ovary or testis) = trachea ≥ heart, liver, gizzard, cecum, muscles (Pectoralis and Supracoracoideus) and skin. In addition, the specific regions of embryonic neural crest derived cells, such as cardiac artery and various parts of cephalic tissues, were found to be locally hyperpigmented. These data suggest that hyperpigmentation (fibromelanosis) in Silky fowl chicken occurs in a tissue-and organ-specific manner, which is strongly related to neural crest cell development. It is hypothesized that neural crest cells of the bird, containing melanocyte progenitors, acquire unusual ability to differentiate into melanocytes excessively, and to extend the distribution of their descendant along the destinations of neural crest derivatives.-KEY WORDS: hyperpigmentation, melanocyte, neural crest, pigment distribution, Silky fowl.

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Biologische Auswertung der Androgene

Voss¹

1974

Androgens II and Antiandrogens / Androgene II Und Antiandrogene

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On the presence of pigment cells in the interstitium of the testes of some indian birds

Cited by 3 publications

References 3 publications

Growth of Neural Crest Cells In Vitro Is Enhanced By Extracts From Silky Fowl Embryonic Tissues

Growth of Neural Crest Cells In Vitro Is Enhanced By Extracts From Silky Fowl Embryonic Tissues

Molecular Characteristics and Site Specific Distribution of the Pigment of the Silky Fowl.

Biologische Auswertung der Androgene

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