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Animals
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The Livestock Corpus Luteum: Development, Maintenance, and Regression
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The Livestock Corpus Luteum: Development, Maintenance, and Regression

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Reproduction".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 2266

Special Issue Editor

Dr. David Barrett

E-Mail Website
Guest Editor
Department of Animal Science and Aquaculture, Dalhousie University, Truro, NS, Canada
Interests: reproduction; controlled breeding; nutrition; exogenous steroidogenic compounds

Special Issue Information

Dear Colleagues,

This Special Issue, The Livestock Corpus Luteum: Development, Maintenance, and Regression, will focus on the biology and regulation of the livestock corpus luteum (CL). It will cover CL biology from the peri-pubertal period up to reproductive senescence and controlling the CL for assisted reproduction in ruminants, horses, pigs, camelids, carnivores, and rabbits. The review articles presented herein will bring together the current state of knowledge on CL biology and how the CL is manipulated for controlled breeding across various livestock species. The final paper in this Special Issue will cover future livestock CL research directions, acting as a compass to direct future fundamental and applied livestock CL research.

Best regards,

Dr. David Barrett
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • livestock
  • corpus luteum
  • development
  • maintenance
  • regression
  • regulation
 

Published Papers (2 papers)

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Research

11 pages, 1040 KiB  
Article
Local Expression Dynamics of Various Adipokines during Induced Luteal Regression (Luteolysis) in the Bovine Corpus Luteum
by Granit Thaqi, Bajram Berisha and Michael W. Pfaffl
Animals 2023, 13(20), 3221; https://doi.org/10.3390/ani13203221 - 15 Oct 2023
Viewed by 947
Abstract
The study aimed to evaluate the mRNA expression levels of various local novel adipokines, including vaspin, adiponectin, visfatin, and resistin, along with their associated receptors, heat shock 70 protein 5, adiponectin receptor 1, and adiponectin receptor 2, in the corpus luteum (CL) during [...] Read more.
The study aimed to evaluate the mRNA expression levels of various local novel adipokines, including vaspin, adiponectin, visfatin, and resistin, along with their associated receptors, heat shock 70 protein 5, adiponectin receptor 1, and adiponectin receptor 2, in the corpus luteum (CL) during luteal regression, also known as luteolysis, in dairy cows. We selected Fleckvieh cows in the mid-luteal phase (days 8–12, control group) and administered cloprostenol (PGF analog) to experimentally induce luteolysis. We collected CL samples at different time points following PGF application: before treatment (days 8–12, control group) and at 0.5, 2, 4, 12, 24, 48, and 64 h post-treatment (n = 5) per group. The mRNA expression was measured via real-time reverse transcription polymerase chain reaction (RT-qPCR). Vaspin was characterized by high mRNA levels at the beginning of the regression stage, followed by a significant decrease 48 h and 64 h after PGF treatment. Adiponectin mRNA levels were elevated 48 h after PGF. Resistin showed upregulation 4 h post PGF application. In summary, the alterations observed in the adipokine family within experimentally induced regressing CL tissue potentially play an integral role in the local regulatory processes governing the sequence of events culminating in functional luteolysis and subsequent structural changes in the bovine ovary. Full article
(This article belongs to the Special Issue The Livestock Corpus Luteum: Development, Maintenance, and Regression)
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14 pages, 1001 KiB  
Article
Morphologic, Steroidogenic, and Transcriptomic Assessment of the Corpus Luteum in Holstein Cows after Spontaneous or Hormone-Induced Ovulation
by Patricio Ponce-Barajas, Marcos G. Colazo, Amir Behrouzi, Todd O. Ree, John P. Kastelic and Divakar J. Ambrose
Animals 2023, 13(14), 2283; https://doi.org/10.3390/ani13142283 - 12 Jul 2023
Viewed by 865
Abstract
There is evidence that replacing the gonadotropin-releasing hormone (GnRH) with porcine luteinizing hormone (pLH) to synchronize ovulation prior to artificial insemination (AI) increased pregnancy per AI in dairy cows without affecting blood progesterone (P4) concentrations. Whether morphologic, steroidogenic, and transcriptomic differences [...] Read more.
There is evidence that replacing the gonadotropin-releasing hormone (GnRH) with porcine luteinizing hormone (pLH) to synchronize ovulation prior to artificial insemination (AI) increased pregnancy per AI in dairy cows without affecting blood progesterone (P4) concentrations. Whether morphologic, steroidogenic, and transcriptomic differences exist among corpora lutea (CL) formed after ovulation induced by GnRH and pLH is unclear. Our main objective, therefore, was to compare CL characteristics between GnRH- and pLH-induced CL. In 24 non-lactating Holstein cows, ovulations were spontaneous (Spont-Ov) or induced with 100 µg GnRH, 25 mg pLH, or 1 mg estradiol benzoate (EB), with CL excised 12 d after ovulation. In pLH- versus GnRH-treated cows, the duration of elevated LH (above baseline) was prolonged (10 versus 6 h, respectively, p < 0.01), but CL dimensions, pixel intensity of CL images, proportions of steroidogenic and non-steroidogenic luteal cells, and mean plasma LH did not significantly differ. Post-ovulation mean plasma P4 (ng/mL) did not differ among Spont-Ov (3.0) pLH (3.1) or GnRH (3.0) cows but were lower in EB cows (2.0). In vitro P4 concentration was greater in luteal explants of pLH-treated cows than in all other groups (combined means, 16.0 vs. 12.3 µg/mL, p < 0.02). Relative abundance of mRNA for oxytocin receptor (OXTR) was 2-fold higher (p < 0.01) in CL of pLH vs. GnRH cows and highest in Spont-Ov CL. In summary, pLH-treated cows had a longer LH peak, and greatest luteal tissue concentrations and in vitro production of P4. We inferred that increased P4 concentrations at the ovarian–uterine level in pLH-treated cows could have promoted embryo development and increased pregnancy per AI. Full article
(This article belongs to the Special Issue The Livestock Corpus Luteum: Development, Maintenance, and Regression)
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