Oxytocin is required for normal milk fat production
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE289680 | GEO | 2026/06/08
REPOSITORIES: GEO
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Project description:Leucyl and cystinyl aminopeptidase (LNPEP/oxytocinase) is a key regulator of oxytocin. Our objectives were to measure serum concentrations of LNPEP and determine the presence of LNPEP and oxytocin (OXT) in equine tissue. LNPEP was measured by ELISA in serum obtained: every other day from ovulation (D0) until D21-22 in nonpregnant and pregnant mares; and at around 320 days of gestation, at 24 hours before foaling, and 20 min and 2 hrs post-foaling. Placenta from the pregnant horn (PH), nonpregnant horn (NPH) and body (B) and from tissues of 6 nonpregnant mares were homogenized and extracts obtained for protein determination and LNPEP ELISA assay. Identification of LNPEP and OXT protein in tissues was also performed via western blot (WB), immunohistochemistry (IHC) and liquid chromatography-mass spectrometry (LC-MS/MS). Furthermore, in situ hybridization was performed for LNPEP and OXT on endometrium, myometrium, pituitary and corpus luteum (CL). No difference in serum LNPEP concentration was identified between any of the groups. The NPH had the lowest quantities of LNPEP (P<0.05). The highest to lowest LNPEP U/mg protein by tissue were: myometrium> follicle wall> endometrium> kidney>CL> liver. Oxytocin was identified in the equine pituitary, CL and placenta. LNPEP may regulate the availability of luteal OXT locally.
2023-05-10 | PXD036368 | Pride
Project description:Oxytocin (OXT) is a neuropeptide hormone termed “love hormone” that is produced and released during childbirth and lactation. It is also produced in response to stimulation of the skin (e.g., during hugging and massaging) and music therapy, among others. The effects of OXT on various organs have been revealed in recent years; however, the relationship between hair follicles and OXT remains unclear. In this study, we examined the effects of OXT on dermal papilla (DP) cells, that control hair growth by secreting growth/regression signals. Gene expression analysis revealed that DP functional markers were significantly upregulated in DP cells treated with OXT. In addition, we tested the hair growth-promoting effects of OXT using in vitro hair follicle organoids. OXT promoted the growth of hair peg-like sprouting by upregulating the expression of hair growth-promoting factors including genes encoding vascular endothelial growth factor A (VEGFA). This study highlights the positive effects of OXT in hair follicles and may assist in the development of new treatments for alopecia.
2024-12-01 | GSE233904 | GEO
Project description:Gene expression profiles of normal human mammary epithelial cell subsets enriched for luminal or myoepithelial characteristics on the basis of EpCAM and CD49f expression. Transcription profiles were compared between luminal- and myoepithelial-enriched human MEC subsets following 3D culture from 4 individuals. Gene expression profiles of normal human mammary epithelial cell subsets enriched for mature, luminal progenitor or bipotent progenitor-enriched characteristics on the bais of CD49f, MUC1, CD10, CD133 and Thy1 expression Transcription profiles were compared between unsorted, mature, luminal progenitor-enriched and bipotent progenitor-enriched human MEC subsets following 3D culture from 2 individuals. Four replicates of luminal-enriched human MECs and 3 replicates of myoepithelial-enriched MECs Transcription profiles of two replicates of unsorted, mature, luminal progenitor-enriched and bipotent progenitor-enriched human MEC subsets were analysed following 3D culture
2012-08-17 | E-GEOD-31429 | biostudies-arrayexpress
Project description:To explore the transcriptional heteroeneity of oxytocin neurons, we fluorescence-assisted nuclei sorting (FANS) conditionally tagged nuclei from Oxt-ires-Cre;CAG-Sun1sfGFP mice. All mice were littermates and fed either SC diet or HFHS diet for 4 months. Individual nuclei were sorted into 384w plates and subjected to SMART-seq2.
2023-09-21 | GSE243448 | GEO
Project description:Obesity is characterized by abnormal adipose development and disruptive energy metabolism, and with many factors involved. Oxytocin receptor (OXTR) affects social behaviors, mammary gland development and cancers. In this study, transgenic overexpression of OXTR under β-actin promoter (++Oxtr) exhibited a lean phenotype with reduced fat accumulation and without significant change in food consumption. OXTR overexpression enhanced energy expenditure, adaptive thermogenesis and glucose tolerance. Morphologically, OXTR overexpression displayed a browning phenotype in adipose tissue accompanied by higher cell counts and smaller adipocytes. Gene expression analysis revealed elevated levels of Brown Adipose Tissue (BAT) markers, fatty acid transport proteins and glucose transporters in adipose tissues. High OXTR ameliorated high-fat-diet induced obesity with improvement of metabolic parameters. Furthermore, OXTR overexpression led to an activation of PPAR signaling, increased energy consumption, reduced fat accumulation and weight loss. We have identified OXTR to be a critical regulator of energy metabolism and thermogenesis. That OXTR enhances adaptive thermogenesis and energy metabolism may present a novel therapeutic target for metabolic disorders.
2025-09-01 | GSE276520 | GEO
Project description:The WWOX gene has been implicated in human cancers, including breast cancer.The development and tumorigenesis between human and mouse mammary glands (MGs) share similar molecular details and signal transduction pathways. We established mouse line that specifically knockout the expression of WWOX gene in the MG epithelial cells (MECs) by crossing BK5-cre mice with our WWOX flox stain. In order to study the gene expression profile in the subpopulation MECs, we isolated the organoids from the 4th MGs of both BK5-cre +; WWOX flox/flox (KO) mice and their WT counterparts (BK5-cre -; WWOX flox/flox), 3 mice each genotype. The total RNA from the mouse MG organoids was extracted and purified by TRIzol/RNeasy Kit and their integrity was checked on Agilent RNA 6000 Nanochip. The goal is to identify the significant perturbation in tumorigenic pathways in these cells induced by WWOX ablation. Mammary gland epithelial organoids samples and gene expression profiles were deribed from three WWOX-KO mice (BK5-cre +; WWOX flox/flox) and from three WWOX-WT mice (BK5-cre -; WWOX flox/flox)
2012-04-14 | E-GEOD-36665 | biostudies-arrayexpress
Project description:Our understanding of semi-cystic spermatogenesis in the Senegalese sole (Solea senegalensis), specifically the process where spermatids are released and undergo differentiation in the lumen, remains limited. Previously, we demonstrated that Luteinizing hormone (Lh) has the ability to penetrate the blood-testis barrier and reach released spermatids expressing the Lh receptor, thereby stimulating spermiogenesis. To deepen our knowledge, the current study aims to investigate how gonadotropins regulate the release of spermatids from Sertoli cells, known as spermiation. We conducted a six-week experiment exposing male Senegalese sole to recombinant gonadotropins (Follicle-stimulating hormone, rFsh, or rLh) via weekly injections at a dose of 6 μg/kg. Following treatment, we performed transcriptomic analysis using RNA-seq to identify differentially expressed genes (DEGs). We found that rLh significantly regulated 1316 genes, while rFsh regulated 717 genes, with 357 DEGs common to both. Pathway analysis revealed that both gonadotropins influenced the expression of cell-cell junctions and adhesion proteins. Notably, other affected pathways included those involving oxytocin (OXT) and relaxin (RLN), suggesting their potential roles in regulating spermiation. Immunohistochemistry (IHC) and in situ hybridization (ISH) were employed to investigate the cellular localization of OXT and RLN receptors in the testicular cortex and medulla, primarily finding them in Sertoli cells and spermatids. Proteins associated with cell adhesion identified through RNA-seq, such as CTNNB1, PARD3, GJA3, TJP2, CLDN4, TMEM47, and ITBG1, were observed in either spermatids or Sertoli cells, with their expression mainly repressed by gonadotropins. This repression indicates a disruption in Sertoli cell-spermatid junctions, potentially responsible for active spermiation and the enhanced permeability of the blood-testis barrier. Furthermore, we conducted an in vitro assay where testes explants were incubated with OXT, RLN, OXT inhibitor (L-371), RLN inhibitor (AT001), in combination with rFsh and rLh. Subsequent qPCR analysis indicated a trend towards decreased expression of cell adhesion genes by OXT and RLN, most notably by Lh by acting through the OXT and RLN pathways. In summary, our findings suggest that gonadotropins regulate cell adhesion and spermiation through a cross-talk between OXT and RLN pathways. These insights lay the groundwork for further research aimed at unraveling the process of spermiation in fish species.
2025-06-25 | GSE279689 | GEO
Project description:The WWOX gene has been implicated in human cancers, including breast cancer.The development and tumorigenesis between human and mouse mammary glands (MGs) share similar molecular details and signal transduction pathways. We established mouse line that specifically knockout the expression of WWOX gene in the MG epithelial cells (MECs) by crossing BK5-cre mice with our WWOX flox stain. In order to study the gene expression profile in the subpopulation MECs, we isolated the organoids from the 4th MGs of both BK5-cre +; WWOX flox/flox (KO) mice and their WT counterparts (BK5-cre -; WWOX flox/flox), 3 mice each genotype. The total RNA from the mouse MG organoids was extracted and purified by TRIzol/RNeasy Kit and their integrity was checked on Agilent RNA 6000 Nanochip. The goal is to identify the significant perturbation in tumorigenic pathways in these cells induced by WWOX ablation.
2012-04-15 | GSE36665 | GEO
Project description:To get molecular insight into age- and compartment-specific changes in telomere maintenance and associated properties in human mammary gland, we analyzed distinct subsets of normal human mammary epithelial cells. The cells were isolated by fluorescent activated cell sorting (FACS) directly from mammary tissue obtained from normal women undergoing reduction mammoplasties with concomitant removal of hematopoietic and endothelial cells by depletion of CD45pos and CD31pos cells. The three epithelial cell populations then isolated were: (i) CD49fhiEPCAMneg/low cells, (ii) CD49fposEPCAMpos cells and (iii) CD49fnegEPCAMpos cells. The CD49fhiEPCAM-/low cells are selectively enriched in mammary stem cells with functional mammary gland regenerating activity in suitably transplanted immunodeficient mice, bipotent progenitors that form colonies of adherent myoepithelial and luminal cells in vitro, myoepithelial-restricted progenitors that form colonies of exclusively adherent myoepithelial cells in vitro, and mature myoepithelial cells that are not clonogenic (collectively referred to as basal cells, BCs). The CD49fposEPCAMpos cells are selectively enriched in luminal progenitors (referred to as luminal progenitors, LPs); and the CD49fnegEPCAMpos cells are selectively enriched in mature luminal cells (referred to as luminal cells, LCs). Differences in gene expression in general and telomere associated genes in particular were elucidated by analyzing mammary epithelial subpopulations. Total RNA was isolated from 24 samples obtained from FACS purification of mammary epithelial subpopulations from 9 reduction mammoplasty breast tissues. Global gene expression profiling was performed by array.
2013-07-26 | E-GEOD-37223 | biostudies-arrayexpress
Project description:To get molecular insight into age- and compartment-specific changes in telomere maintenance and associated properties in human mammary gland, we analyzed distinct subsets of normal human mammary epithelial cells. The cells were isolated by fluorescent activated cell sorting (FACS) directly from mammary tissue obtained from normal women undergoing reduction mammoplasties with concomitant removal of hematopoietic and endothelial cells by depletion of CD45pos and CD31pos cells. The three epithelial cell populations then isolated were: (i) CD49fhiEPCAMneg/low cells, (ii) CD49fposEPCAMpos cells and (iii) CD49fnegEPCAMpos cells. The CD49fhiEPCAM-/low cells are selectively enriched in mammary stem cells with functional mammary gland regenerating activity in suitably transplanted immunodeficient mice, bipotent progenitors that form colonies of adherent myoepithelial and luminal cells in vitro, myoepithelial-restricted progenitors that form colonies of exclusively adherent myoepithelial cells in vitro, and mature myoepithelial cells that are not clonogenic (collectively referred to as basal cells, BCs). The CD49fposEPCAMpos cells are selectively enriched in luminal progenitors (referred to as luminal progenitors, LPs); and the CD49fnegEPCAMpos cells are selectively enriched in mature luminal cells (referred to as luminal cells, LCs). Differences in gene expression in general and telomere associated genes in particular were elucidated by analyzing mammary epithelial subpopulations.
2013-07-26 | GSE37223 | GEO