#vitellogenous

[bewiitchedbitch]

the more I learn about hormones and the reaction of animals to certain hormones. the more it becomes apparent that there are much more transgender animals out there due to human fuck ups.

[robotblues]

3. Ovary of pea crab, Pinnotheres pisum (Pinnotheridae). The germinative zones (gz) lie centrally within ovaries, where oogonia develop into previtellogenic oocytes (po) and incorporate yolk material to develop into vitellogenic oocytes (vo). Other abbreviations: Hp, hepatopancreas; od, oviduct. Trichromatic Masson-Goldner stain.

[biomedres]

A Review on the Reproduction and Development in Fish

A Review on the Reproduction and Development in Fish by Chattopadhyay NR in  Biomedical Journal of Scientific & Technical Research (BJSTR) https://biomedres.us/fulltexts/BJSTR.MS.ID.000529.php

For more articles on BJSTR please click here:https://biomedres.us/index.php

For journal of biomedical research and reviews

[mbimphblog]

EFFECT OF CADMIUM CHLORIDE ON THE OVARIAN ACTIVITY IN FRESH WATER CATFISH CLARIAS BATRACHUS (LINN.) | UTTAR PRADESH JOURNAL OF ZOOLOGY

Cadmium chloride's effect on Clarias battrachus (Linn) ovaries has been investigated. The ovarian activity was lowered by 400 mg/l Cadmium chloride treatment from September to November. In treated fishes, stage II (vitellogenic) oocytes and the gonosomatic index (GSI) both reduced dramatically. Cadmium chloride increased the frequency of at retic follicles after 45 days. The reduced level of gonadotropin release after exposure to heavy metal may be responsible for this effect on ovarian regression. The GSI dropped after 90 days of therapy, while retic follicles grew. After 45 days of treatment, a phase of recrudescence begins, according to the findings. Please see the link :- http://mbimph.com/index.php/UPJOZ/article/view/998

[rnomics]

Expression of acyl-CoA-binding protein 5 from Rhodnius prolixus and its inhibition by #RNA interference

by Muriel G. M. D. Almeida, Daniela S. Arêdes, David Majerowicz, Nils J. Færgeman, Jens Knudsen, Katia C. Gondim The acyl-CoA-binding proteins (ACBP) act by regulating the availability of acyl-CoA in the cytoplasm and must have essential functions in lipid metabolism. The genome of the kissing-bug Rhodnius prolixus encodes five proteins of this family, but little is known about them. In this study we investigated the expression and function of RpACBP-5. Feeding induced RpACBP-5 gene expression in the posterior midgut, and an increase of about four times was observed two days after the blood meal. However, the amount of protein, which was only detected in this organ, did not change during digestion. The RpACBP-5 gene was also highly expressed in pre-vitellogenic and vitellogenic oocytes. Recombinant RpACBP-5 was shown to bind to acyl-CoA of different lengths, and it exhibited nanomolar affinity to lauroyl-CoA in an isothermal titration assay, indicating that RpACBP-5 is a functional ACBP. RpACBP-5 knockdown by #RNA interference did not affect digestion, egg laying and hatching, survival, or accumulation of triacylglycerol in the fat body and oocytes. Similarly, double knockdown of RpACBP-1 and RpACBP-5 did not alter egg laying and hatching, survival, accumulation of triacylglycerol in the fat body and oocytes, or the neutral lipid composition of the posterior midgut or hemolymph. These results show that RpACBP-5 is a functional ACBP but indicate that the lack of a detectable phenotype in the knockdown insects may be a consequence of functional overlap of the proteins of the ACBP family found in the insect. http://bit.ly/3accuy0

[healthtimetaylor]

GSM radiation destroys ovarian egg chambers in Drosophilia flies.

PMID:  Cell Biochem Biophys. 2012 Jun ;63(2):121-32. PMID: 22367734 Abstract Title:  Effect of microwave exposure on the ovarian development of Drosophila melanogaster. Abstract:  In the present experiments the effect of GSM radiation on ovarian development of virgin Drosophila melanogaster female insects was studied. Newly emerged adult female flies were collected and divided into separate identical groups. After the a lapse of certain number of hours-different for each group-the insects (exposed and sham-exposed) were dissected and their intact ovaries were collected and photographed under an optical microscope with the same magnification. The size of the ovaries was compared between exposed and sham-exposed virgin female insects, during the time needed for the completion of oogenesis and maturation of the first eggs in the ovarioles. Immediately after the intact ovaries were photographed, they were further dissected into individual ovarioles and treated for TUNEL and acridine-orange assays to determine the degree of DNA damage in the egg chamber cells. The study showed that the ovarian size of the exposed insects is significantly smaller than that of the corresponding sham-exposed insects, due to destruction of egg chambers by the GSM radiation, after DNA damage and consequent cell death induction in the egg chamber cells of the virgin females as shown in previous experiments on inseminated females. The difference in ovarian size between sham-exposed and exposed virgin female flies becomes most evident 39-45 h after eclosion when the first eggs within the ovaries are at the late vitellogenic and post-vitellogenic stages (mid-late oogenesis). More than 45 h after eclosion, the difference in ovarian size decreases, as the first mature eggs of the sham-exposed insects are leaving the ovaries and are laid.

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[eurekamag--com]

Vitellogenic arrest in the cockroach, Blatta orientalis

http://dlvr.it/PW9bRx

[rnomics]

Fishes, Vol. 4, Pages 16: Transcriptomic Changes during Previtellogenic and Vitellogenic Stages of Ovarian Development in Wreckfish (Hāpuku), Polyprion oxygeneios (Perciformes)

‘Wreckfish’ a collective of species belonging to the family Polyprionidae, are an important commercial fishery and have significant aquaculture potential. Until now, genomic or transcriptomic information for any species within the genus Polyprion has either remained unpublished or is non-existent. Using Illumina HiSeq, we compared the transcriptomes of hāpuku (Polyprion oxygeneios) ovaries to explore developmental stage-specific variations underlying their reproductive physiology. We sought to identify differentially expressed genes and the associated shifts in biological pathways between previtellogenic and early vitellogenic ovaries. Ovarian tissue was repeatedly biopsied by gonopore cannulation from the same females (n = 3) throughout oogenesis. Reproductive status of initial biopsies was confirmed as being previtellogenic and that in biopsies collected eight weeks later as early vitellogenic. A de novo hāpuku transcriptome was assembled (146,189 transcripts) from #RNA-Seq data without a reference genome. On average, each tissue sample contained 17.5 million trimmed reads. Gene annotation was 80% when using BLASTX against Genbank Non Redundant database. Fifty-three transcripts were differentially expressed within the FDR of 0.05 when previtellogenic and early vitellogenic ovaries were compared; this reduced to 35 differentially expressed genes when transcript duplications were pooled. Among these were genes tentatively associated with the electron transport chain, lipid metabolism, steroidogenesis and mineral/solute transportation. These data provide a snap-shot into stage-specific physiological events during oogenesis in the ovary of a teleost and an extensive molecular resource for research on species in the Genus Polyprion. http://bit.ly/2EEoXwG

[eurekamag--com]

Factors promoting vitellogenic competence and yolk deposition in the cockroach ovary: larval-adult transition

http://dlvr.it/NhpksW

[eurekamag--com]

Factors promoting vitellogenic competence and yolk deposition in the cockroach ovary: the post-ecdysis female

http://dlvr.it/Nd8rDT