Adrenal tissue in the male African catfish, Clarias gariepinus : localization and steroid hormone secretion

Vermeulen, G. J.; Lambert, J.G.D.; Teitsma, C. A.; Zandbergen, Matthijs A.; Goos, H. J. T.

doi:10.1007/s004410050392

Cited by 3 publications

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“…The interrenal tissue of adult catfish produced some androgens, such as A 2 (Vermeulen et al 1995). However, no indication for the conversion of [ 3 H]-pregnenolone into androgens by the interrenal tissue of juvenile or adolescent male African catfish was found.…”

Section: Discussionmentioning

confidence: 89%

“…Accordingly, Vermeulen et al (1995) showed that the interrenal tissue of catfish synthesizes, in addition to cortisol (C), C19 steroids, such as androstenedione (A 2 ) and 5-and 5-androstanedione. The in vitro steroid metabolism in the testis of adult African catfish has been studied extensively by Schoonen and Lambert (1986a), using labelled steroid precursors.…”

Section: Introductionmentioning

confidence: 99%

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Pubertal development of male African catfish,Clarias gariepinus. In vitro steroidogenesis by testis and interrenal tissue and plasma levels of sexual steroids

Cavaco

Lambert

Schulz

et al. 1997

Fish Physiol Biochem

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In fish, sex steroids initiate and/or accelerate the maturation of the brain-pituitary-gonad axis. In order to obtain information on the steroid milieu during the pubertal development of male African catfish, we have monitored the conversion of [ 3 H]-pregnenolone and [ 3 H]-androstenedione by testis and [ 3 H]-pregnenolone by interrenal tissue fragments in vitro. Pubertal development occurs between two and six months of age. Testicular development proceeds through four main stages that are characterised histologically by the presence of spermatogonia (stage I), spermatogonia and spermatocytes (stage II), spermatogonia, spermatocytes and spermatids (stage III), and all germ cells including spermatozoa (stage IV). 11 -Hydroxyandrostenedione and cortisol were the main products of testes and interrenal tissue, respectively, in all stages of the pubertal development; a change in the steroidogenic pattern was not observed during this period. The interrenal tissue displayed no significant conversion of [ 3 H]-pregnenolone to 11-oxygenated androgens.Blood plasma was analyzed for the presence of five androgens; testosterone, 11 ,-hydroxytestosterone, 11 Jhydroxyandrostenedione, androstenetrione, and 11 -ketotestosterone. 11-Ketotestosterone was the quantitatively dominating androgen in the circulation at all stages of development, which was more pronounced in stages III and IV. The obvious differences between the in vitro and in vivo results, namely 1 3-hydroxyandrostenedione being the main testicular product vs. 11 -ketotestosterone dominating in the blood, may indicate that 11 3-hydroxyandrostenedione is converted to 11 -ketotestosterone at extratesticular sites.

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Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Pubertal development of male African catfish,Clarias gariepinus. In vitro steroidogenesis by testis and interrenal tissue and plasma levels of sexual steroids

Cavaco

Lambert

Schulz

et al. 1997

Fish Physiol Biochem

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“…Several previous information from other teleosts (Matsuyama et al 1991) supports this concept that T possibly plays a role in the initiation and maintenance of spermatogenesis. Moreover, in golden mahseer, it remains to be investigated whether the androgens (T and 11-KT) are mainly produced by the testes, or also whether non-testicular tissues such as adrenal gland and inter-renal tissue can be a source of androgens (Mayer et al 1990;Vermeulen et al 1995;Cavaco et al 1997a, b) and have the capacity of androgen production and conversion. In addition, the role of androgens in development of secondary sexual characteristic in maturing T. putitora also needs to be investigated.…”

Section: Hormonesmentioning

confidence: 98%

Spermatogenesis and related plasma androgen and progestin level in wild male golden mahseer, Tor putitora (Hamilton, 1822), during the spawning season

Shahi

Mallik

Pande

et al. 2015

Fish Physiol Biochem

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Testicular development and plasma levels of sex steroid [11-ketotestosterone (11-KT), testosterone (T) and 17,20β-dihydoxy-4-pregnen-3-one (17,20β-P)] were studied for the first time in wild golden mahseer, Tor putitora. Testicular development was investigated by macroscopic observation and histology of the gonads, whereas steroids were measured by enzyme-linked immunosorbent assay. Based on macroscopic observation and germ cell types present in gonad histology, the testes of T. putitora were divided into five developmental stages: immature [stage I; spermatogonia (SPG)], early spermatogenesis [stage II; SPG and spermatocytes (SPC)], late spermatogenesis [stage III; SPG, SPC, spermatids (SPD) and spermatozoa (SPZ)], spermiation (stage IV; SPZ) and post-spawning (stage V; SPG, SPD and SPZ). During the stage I of the testes, the lowest levels of plasma sex steroid and gonadosomatic index (I G) were recorded. The highest plasma level of T was 0.89 ± 0.09 ng/mL and 11-KT was 4.23 ± 0.54 ng/mL, which was during the stage III and IV, respectively. The peak in 11-KT was coincident with the peak in I G (1.65 ± 0.12 %). The lowest T and 11-KT levels were 0.25 ± 0.02 ng/mL and 0.47 ± 0.09 ng/mL, respectively, which was at stage I. Plasma levels of 17,20β-P increased significantly at stage III (1.04 ± 0.06 ng/mL) and stage IV testes (1.28 ± 0.03 ng/mL) and then declined in post-spawned fish. This indicates that 17,20β-P could also be a possible maturation-inducing steroid in this fish. The condition factor (K) significantly decreased during the testicular development and was lowest at spermiation stage (0.53 ± 0.02 %). The proportion of running male peaked concomitantly with the appearance of stage IV testes. Presence of germ cells of different developmental stages indicates that T. putitora male is a multiple spawner, and the information generated here is important for developing a captive breeding, culture and conservation programs for this endangered coldwater Himalayan fish species.

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Structural and Ultrastructural Characteristics of Interrenal Gland and Chromaffin Cell of Matrinxã, Brycon cephalus Gunther 1869 (Teleostei‐Characidae)

Rocha¹,

Santos²,

Vicentini³

et al. 2001

Anat Histol Embryol

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This work presents the structure and ultrastructure of the interrenal gland and chromaffin cells, as well as the morphology of the head kidney of Brycon cephalus. The head kidney is composed of fused bilateral lobes located anterior to the swim bladder and ventrolateral to the spinal column. The parenchyma revealed lympho-haematopoietic tissue, melano-macrophage centres, interrenal gland and chromaffin cells. The interrenal gland consisted of cords or strands of cells grouped around the posterior cardinal vein and their branches. Chromaffin cells are found in small groups, closely associated with the interrenal gland and/or under the endothelium of the posterior cardinal vein. So far, the ultrastructural analysis has revealed only one interrenal cell type which contained abundant smooth endoplasmic reticulum and numerous mitochondria with tubulo-vesicular cristae, characteristic of steroid-producing cells. Two types of chromaffin cells were observed. The first type was characterized by the presence of vesicles with round, strongly electron-dense granules, which were eccentrically located. Such cells were interpreted as noradrenaline cells. Meanwhile, cells which contained smaller vesicles and electron-lucent granules, with a small halo separating the granule from the vesicular limiting membrane, were identified as adrenaline cells.

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Adrenal tissue in the male African catfish, Clarias gariepinus : localization and steroid hormone secretion

Cited by 3 publications

References 0 publications

Pubertal development of male African catfish,Clarias gariepinus. In vitro steroidogenesis by testis and interrenal tissue and plasma levels of sexual steroids

Pubertal development of male African catfish,Clarias gariepinus. In vitro steroidogenesis by testis and interrenal tissue and plasma levels of sexual steroids

Spermatogenesis and related plasma androgen and progestin level in wild male golden mahseer, Tor putitora (Hamilton, 1822), during the spawning season

Structural and Ultrastructural Characteristics of Interrenal Gland and Chromaffin Cell of Matrinxã, Brycon cephalus Gunther 1869 (Teleostei‐Characidae)

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