Hasil untuk "Reproduction"

Ekaterina Pavlova, Rosen Ivanov, Desislava Abadjieva et al.

Diabetes mellitus (DM) causes male infertility through the suppression of spermatogenesis and testosterone biosynthesis. The impact of DM on male reproduction has mainly been investigated in adulthood, therefore we aimed to study the developmental effects of DM, induced in early life, on testicular cell population and fertility. Neonatal (NDM) and prepubertal DM (PDM) were induced in immature rats by streptozotocin administration on day 1 or day 10, respectively. Germ (GCs) and somatic cells (Sertoli—SCs and Leydig cells—LCs) were counted in pubertal (25 day) and post-pubertal (45 day) rats in tandem with the measurement of serum testosterone levels and the protein expression of androgen receptor. Glucose levels were higher in PDM than in NDM. Incomplete spermatogenesis and reduced GC number were found in PDM but not in NDM. LC number, testosterone, and luteinizing hormone (LH) levels were differently altered by both types of DM with a pronounced negative impact of PDM. Protein expression of androgen receptor in SCs was altered only in PDM. Reduced sperm concentration and motility was found in both groups. Thus, our results provide new insights into different mechanisms of action of PDM and NDM on developing germ cells that involved disturbances in androgen production by Leydig cells and androgen action in Sertoli cells.

Koji Nakagawa, Takashi Horikawa, Hideaki Watanabe et al.

Purpose: The objective of this study was to estimate the number of oocytes that need to be retrieved to obtain at least one euploid embryo (NOR-euploid) based on our clinic’s preimplantation genetic testing for aneuploidy (PGT-A) outcomes, stratified by maternal age. All patients underwent PGT-A due to recurrent pregnancy loss (RPL) or repeated implantation failure (RIF), which may not represent the general in vitro fertilization (IVF) population. Methods: A total of 4,440 oocyte pick-up (OPU) cycles performed for PGT-A at our clinic between April 2019 and May 2024 were retrospectively analyzed. RPL was defined as [Formula: see text] pregnancy losses; RIF was defined as [Formula: see text] transfers of morphologically good blastocysts without pregnancy. Euploidy rates were calculated based on the number of retrieved oocytes (NOR) within each maternal age group. The NOR-euploid was estimated for each age group using the inverse of the euploidy rate, and 95% confidence intervals (CIs) were calculated using the Wilson score method. Results: The euploidy rates per retrieved oocyte were as follows (95% CI): 18.1% (16.3–20.0) for [Formula: see text] years; 14.8% (13.7–16.0) for 31–32 years; 14.7% (13.8–15.7) for 33–34 years; 12.9% (11.8–14.0) for 35–36 years; 10.1% (9.3–10.9) for 37–38 years; 7.2% (6.6–7.9) for 39–40 years; 3.8% (3.3–4.3) for 41–42 years; and 1.1% (0.9–1.3) for [Formula: see text] years. The corresponding estimated NOR-euploid values were approximately 6, 7, 7, 8, 10, 14, 27, and 91, respectively. Conclusions: In women under 36 years of age, retrieving approximately 6–7 oocytes is, on average, sufficient to obtain at least one euploid blastocyst; however, individual prognosis may vary depending on multiple biological and clinical factors.

Lauren Danielowski

In 2022, the global commercial surrogacy industry was valued at approximately US$14 billion. This paper explores the issue of surrogacy to reveal how international human rights standards and labor laws treat reproduction as work, building on previous scholarship analyzing similar framing at the grassroots level in Mexico. I argue that the failure to recognize surrogacy as labor is rooted in three lacunae: (1) contemporary policies and practices around surrogacy globally pay little attention to the well-being and rights fulfillment of surrogates themselves, particularly the economic rights of surrogates; (2) the stigma of surrogacy as sexualized care work results in neglect of the labor rights of surrogates in mainstream economic rights discourses; and (3) relevant international rights law has not yet addressed the economic rights of surrogates, nor has it effectively articulated the interdependent relationship between economic rights and reproductive rights. Lastly, I discuss where reproductive rights and economic rights overlap in existing human rights conventions and standards and what possibilities these offer for articulating the interdependence of reproductive and economic rights and for advancing the labor rights of surrogates.

Ryota Matsuyama, Takehisa Yamamoto, Yoko Hayama et al.

Understanding the impact of vaccination in a host population is essential to control infectious diseases. However, the impact of bait vaccination against wildlife diseases is difficult to evaluate. The vaccination history of host animals is generally not observable in wildlife, and it is difficult to distinguish immunity by vaccination from that caused by disease infection. For these reasons, the impact of bait vaccination against classical swine fever (CSF) in wild boar inhabiting Japan has not been evaluated accurately. In this study, we aimed to estimate the impact of the bait vaccination campaign by modelling the dynamics of CSF and the vaccination process among a Japanese wild boar population. The model was designed to estimate the impact of bait vaccination despite lack of data regarding the demography and movement of wild boar. Using our model, we solved the theoretical relationship between the impact of vaccination, the time-series change in the proportion of infected wild boar, and that of immunised wild boar. Using this derived relationship, the increase in antibody prevalence against CSF because of vaccine campaigns in 2019 was estimated to be 12.1 percentage points (95% confidence interval: 7.8–16.5). Referring to previous reports on the basic reproduction number (R0) of CSF in wild boar living outside Japan, the amount of vaccine distribution required for CSF elimination by reducing the effective reproduction number under unity was also estimated. An approximate 1.6 (when R0 = 1.5, target vaccination coverage is 33.3% of total population) to 2.9 (when R0 = 2.5, target vaccination coverage is 60.0% of total population) times larger amount of vaccine distribution would be required than the total amount of vaccine distribution in four vaccination campaigns in 2019. Author summary Vaccination of wildlife is important to control infectious diseases in animals. However, the impact of common vaccination of wildlife, bait vaccination, is difficult to evaluate owing to difficulty in obtaining the vaccination history at the individual level. Mathematical modelling can estimate the impact of vaccination; however, the demography and movement of hosts are required to describe disease dynamics. In this study, we aimed to estimate the impact of bait vaccination by modelling the dynamics of classical swine fever (CSF) and the vaccination among Japanese wild boar. The model was designed to estimate the impact of bait vaccination despite lack of data regarding the demography and movement of wild boar. Using our model, the increase in antibody prevalence because of vaccination in 2019 was estimated to be 12 percentage points. Furthermore, we estimated the amount of vaccine distribution required for CSF elimination by reducing the effective reproduction number under unity. Referring to previous reports on the basic reproduction number of CSF in wild boar living outside Japan, it was estimated that an approximate 1.6 to 2.9 times larger amount of vaccine distribution would be required than the total amount of vaccine distribution in four vaccination campaigns in 2019.

Mor Kishner, Libat Habaz, Lana Meshnik et al.

The quality control machinery regulates the cellular proteome to ensure proper protein homeostasis (proteostasis). In Caenorhabditis elegans, quality control networks are downregulated cell-nonautonomously by the gonadal longevity pathway or metabolic signaling at the onset of reproduction. However, how signals are mediated between the gonad and the somatic tissues is not known. Gonadotropin-releasing hormone (GnRH)-like signaling functions in the interplay between development and reproduction and have conserved roles in regulating reproduction, metabolism, and stress. We, therefore, asked whether GnRH-like signaling is involved in proteostasis collapse at the onset of reproduction. Here, we examine whether C. elegans orthologues of GnRH receptors modulate heat shock survival. We find that gnrr-2 is required for proteostasis remodeling in different somatic tissues during the transition to adulthood. We show that gnrr-2 likely functions in neurons downstream of the gonad in the gonadal-longevity pathway and modulate the somatic regulation of transcription factors HSF-1, DAF-16, and PQM-1. In parallel, gnrr-2 modulates egg-laying rates, vitellogenin production, and thus reproductive capacity. Taken together, our data suggest that gnrr-2 plays a GnRH-associated role, mediating the cross-talk between the reproduction system and the soma in the decision to commit to reproduction.

Yong Ren, Meiling Chen, Guangxian Wu et al.

Abstract Increasing studies demonstrated that oncolytic activities of oHSV-1 are limited to the capacity of virus replicating in tumors. In order to potentiate the oHSV-1 oncolytic activity and expand the application of oHSV-1 treatment in multiple types of tumors, it is critical to explore the potential factors or mechanisms mediating tumor resistance to oHSV-1 infection. Here we evaluated the levels of oHSV-1 multiplication in various tumor cell lines and showed that glioblastoma cell line A172 had the lowest virus yields but intrinsically accumulated the highest levels of Mx2 protein. Subsequently we demonstrated that genetic depletion of Mx2 specifically enhanced oHSV-1 productive replication in A172 cells through promoting the nuclear translocation of uncoated viral genomic DNA and down-regulating innate antiviral response. In the further investigation, we found that Mx2 knockdown could alter the intrinsic mRNA accumulation of diverse sets innate immune genes in A172 cells, in particular DHX36 and MyD88. Mx2 depletion led to a decrease in mRNA levels of MyD88 and DHX36 in A172 cells and MyD88/DHX36 knockdown increased virus yield in A172 cells and decreased the production of IFNα, activation of IRF3 activity and NF-κB signaling in A172 cells. This shed new lights on understanding the roles of some intrinsic antiviral genes in oHSV-1 resistance, facilitating to offer potential targets to improve oHSV-1 oncolytic efficacy and develop candidates of biomarkers to predict the efficiency of oHSV-1 multiplication in tumors.

Wang-Yu Cai, Xi Luo, Erxidi Chen et al.

ObjectiveTo evaluate associations between serum lipid levels and treatment outcomes in women undergoing assisted reproduction.Materials and MethodsThe study included 2011 women who underwent in vitro fertilization/intracytoplasmic sperm injection with fresh embryo transfer. Serum lipid evaluation included total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and triglycerides (TG). Ovarian stimulation outcomes included endometrial thickness and the number of oocytes retrieved, and reproductive outcomes included live birth, clinical pregnancy, and miscarriage.ResultsHigher HDL-C quartiles were associated with more oocytes retrieved. Lower TC (quartile 1 odds ratio [OR] 1.59 [1.21–2.08], quartile 3 OR 1.36 [1.04–1.77]), LDL-C (quartile 1 OR 1.41 [1.07–1.86]), and TG (quartile 2 OR 1.39 [1.06–1.84]) were independently associated with clinical pregnancy after adjusting for potential confounders. Lower LDL-C (quartile 1 OR 2.22 [1.58–3.13], quartile 2 OR 1.78 [1.27–2.50], quartile 3 OR 1.51 [1.07–2.13]), TC (quartile 1 OR 1.39 [1.00–1.93]), TG (quartile 1 OR 1.44 [1.03–2.03], quartile 2 OR 1.46 [1.04–2.04], quartile 3 OR 1.44 [1.04–1.99]), and higher HDL-C (quartile 2 OR 0.71 [0.51–0.99]) were independently associated with live birth. Higher LDL-C (quartile 1 OR 0.44 [0.30–0.66], quartile 2 OR 0.49 [0.33–0.73], quartile 3 OR 0.63 [0.43–0.94]) and lower HDL-C (quartile 1 OR 1.60 [1.07–2.39]) were independently associated with miscarriage.ConclusionsSerum lipid levels were associated with treatment outcomes in women undergoing assisted reproduction.

Nagwa I. El-Kasrawy, Ayman A. Swelum, Mervat A. Abdel-Latif et al.

A total of 108 Holstein cows were used to evaluate the effect of drenching propylene glycol (PG) either individually or in combination with glycerol (G) on body condition score (BCS), production, reproductive performance, protection against subclinical ketosis and economic benefit of dairy cows during the transition period. The six groups (n = 18/group) were; Control group, cows received no treatment; PG300, cows were drenched 300 mL PG for 7 days pre-expected day of calving and 21 days post-calving; PG400, cows were drenched 400 mL PG for 7 days pre-and 7 days post-calving; PG500, cows were drenched 500 mL PG for 10 days pre-and 10 days post-calving; GPG150, cows were drenched a mixture of 150 mL G and 150 mL PG for 21 days pre-and 21 days post-calving; GPG250, cows were drenched a mixture of 250 mL G and 250 mL PG for 21 days pre-and 21 days post-calving. BCS at 30 days in milk (DIM) was significantly higher in all treated groups in comparison to the control one and the best values were observed in GPG250, GPG150 and PG500 groups. Lactation length (LL) was significantly (<i>p</i> < 0.001) shorter in GPG250, GPG150 and PG500 groups than control group. There was a significant increment in 305 milk yield (<i>p</i> < 0.001) and average daily milk yield (<i>p</i> < 0.001) in GPG250 and PG500 groups than other groups except for PG300 with the lowest values for control and PG400. Cows in all treatment groups were observed in heat and conceived earlier as well as had shorter open days and calving interval durations (<i>p</i> < 0.001) and low number of services per conception (<i>p</i> = 0.004) compared to control group with better results for PG500 and GPG250 groups. BHB level and percentage of cows suffered from subclinical ketosis at 7 DIM was significantly lower in GPG250, GPG150 and PG500 groups than control group. Cows in treatment groups had a significantly higher glucose level (<i>p</i> = 0.006) compared to control group. Regarding to economics, the control group showed the highest feed costs, insemination costs and total costs per animal. Additionally, control and PG400 groups had the highest cost per kilogram of milk from total and feed costs compared to other cows. PG300, PG500 and GPG250 groups recorded a greater net return and income over feed cost (IOFC). In conclusion, the continuous drenching of propylene glycol either individually or in combination with glycerol regimens for long duration (PG300, PG500, GPG150, GPG250) during the transition period of dairy cows may reduce the incidence of subclinical ketosis and consequently improve milk production, reproduction and economics compared to drenching for short duration (PG400).

María R. Garrido, Ana I. Peña, Pedro G. Herradon et al.

Aim of study: To evaluate tubal patency in repeat breeder Holstein cows with the purpose of estimating the frequency of oviduct obstruction as a cause of the repeat breeding syndrome. Area of study: Lugo (NW Spain) Material and methods: In 50 repeat breeding cows, a solution of the dye phenol-sulphon-phthalein (PSP) was instilled into one uterine horn with the aid of a balloon catheter. Urine was collected 15, 25 and 45 min post-PSP infusion. Urine of a reddish color was used as indicator of tubal patency, as the PSP had passed across the oviduct into the abdominal cavity and was eliminated in urine. The other oviduct was evaluated on a different day. Main results: Of the 50 cows tested, 44% had some degree of oviduct obstruction: 4% had bilateral oviduct occlusion, 20% unilateral oviduct occlusion, 16% bilateral oviduct stenosis and 4% unilateral oviduct stenosis. No significant relationship could be established between tubal impermeability and postpartum reproductive or metabolic diseases. Research highlights: Tubal stenosis or occlusions were frequent and they are likely to contribute to the repeat breeding syndrome in dairy cows; thus, tubal patency should be routinely evaluated in repeat breeders. The PSP test is easy to perform, well tolerated by animals, and allows evaluating both oviducts separately.

Tianjiao Li, Qiwen Chen, Yi Zheng et al.

Abstract Background Spermatogonial stem cells (SSCs) are the cornerstone of sperm production and thus perpetual male fertility. In clinics, transplantation of patient’s own SSCs into testes is a promising technique to restore fertility when male germ cells have been depleted by gonadotoxic therapies. Auto-transplantation of genetically modified SSCs even has the potential to treat male infertility caused by genetic mutations. However, SSCs are refractory to transfection approaches. Poly(amidoamine) (PAMAM) dendrimers have the unique three-dimensional architecture, surface charge, and high density of surface groups that are suitable for ligand attachment, thereby facilitating target delivery. The goal of this study was to elucidate whether PAMAM dendrimers can efficiently deliver short interfering RNAs (siRNAs) to SSCs. Methods and results We introduced cyclic arginine-glycine-aspartic acid (cRGD) peptides to the fifth generation of PAMAM dendrimers (G5) to generate PAMAM-cRGD dendrimers (G5-cRGD). The characterization of G5-cRGD was detected by Fourier transform infrared spectroscope (FTIR), transmission electron microscope (TEM), and the Cell Counting Kit-8 (CCK-8) assay. Confocal microscopy and flow cytometry were used to evaluate the delivery efficiency of siRNA by G5-cRGD to SSCs. The results showed that G5-cRGD encompassing siRNA could self-assemble into spherical structures with nanoscale size and possess high transfection efficiency, excellent endosomal escape ability, and low cytotoxicity, superior to a commercial transfection reagent Lipofectamine® 2000. Moreover, we demonstrated that G5-cRGD efficiently delivered siRNAs and triggered gene silencing. Conclusions This study thus provides a promising nanovector for siRNA delivery in SSCs, facilitating the future clinical application of SSC auto-transplantation with genetically modified cells with a hope to cure male infertility that is caused by genetic disorders.

S. Daan, C. Dijkstra, R. Drent et al.

M. Lindén, A. P. Møller

Maegwin Bonar, E Hance Ellington, Keith P Lewis et al.

In ungulates, parturition is correlated with a reduction in movement rate. With advances in movement-based technologies comes an opportunity to develop new techniques to assess reproduction in wild ungulates that are less invasive and reduce biases. DeMars et al. (2013, Ecology and Evolution 3:4149-4160) proposed two promising new methods (individual- and population-based; the DeMars model) that use GPS inter-fix step length of adult female caribou (Rangifer tarandus caribou) to infer parturition and neonate survival. Our objective was to apply the DeMars model to caribou populations that may violate model assumptions for retrospective analysis of parturition and calf survival. We extended the use of the DeMars model after assigning parturition and calf mortality status by examining herd-wide distributions of parturition date, calf mortality date, and survival. We used the DeMars model to estimate parturition and calf mortality events and compared them with the known parturition and calf mortality events from collared adult females (n = 19). We also used the DeMars model to estimate parturition and calf mortality events for collared female caribou with unknown parturition and calf mortality events (n = 43) and instead derived herd-wide estimates of calf survival as well as distributions of parturition and calf mortality dates and compared them to herd-wide estimates generated from calves fitted with VHF collars (n = 134). For our data, the individual-based method was effective at predicting calf mortality, but was not effective at predicting parturition. The population-based method was more effective at predicting parturition but was not effective at predicting calf mortality. At the herd-level, the predicted distributions of parturition date from both methods differed from each other and from the distribution derived from the parturition dates of VHF-collared calves (log-ranked test: χ2 = 40.5, df = 2, p < 0.01). The predicted distributions of calf mortality dates from both methods were similar to the observed distribution derived from VHF-collared calves. Both methods underestimated herd-wide calf survival based on VHF-collared calves, however, a combination of the individual- and population-based methods produced herd-wide survival estimates similar to estimates generated from collared calves. The limitations we experienced when applying the DeMars model could result from the shortcomings in our data violating model assumptions. However despite the differences in our caribou systems, with proper validation techniques the framework in the DeMars model is sufficient to make inferences on parturition and calf mortality.

Lis Højgaard, Lisbeth B. Knudsen, Stine Willum Adrian et al.

Book Reviews: Donna Haraway: Manifestly Haraway. (Reviewed by Lis Højgaard)   Ayo Wahlberg & Tine Gammeltoft (eds.): Selective Reproduction in the 21st Century. (Reviewed by Lisbeth B. Knudsen)   Clarke, Adele, Friese, Carrie and Washburn, Rachel S. (2018). Situational Analysis. Grounded Theory after the Interpretive Turn, 2nd Edition. (Reviewed by Stine Willum Adrian)   Cordelia Fine: Testosterone Rex – Unmaking the myths of our gendered minds. (Reviewed by Lea Skewes)   PhD notice: Michala Hvidt Breengaard: HOW TO MOTHER? Practices of infant feeding and the formation of maternal subjectivity among middle-class mothers in Beijing