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https://www.readbyqxmd.com/read/28721183/infertility-in-the-global-south-raising-awareness-and-generating-insights-for-policy-and-practice
#1
T Gerrits, F Van Rooij, T Esho, W Ndegwa, J Goossens, A Bilajbegovic, A Jansen, B Kioko, L Koppen, S Kemunto Migiro, S Mwenda, H Bos
Infertility is a highly prevalent reproductive health condition in the global South, which often has a devastating impact on the people concerned. Yet, thus far it hardly received any attention from policy makers, Non-Governmental Organizations (NGOs) or donors working in the field of Sexual and Reproductive Health and Rights (SRHR). For this reason we have set up a project to increase knowledge and awareness about infertility and childlessness among those stakeholders and organizations and to generate insight into (possible) interventions in this field...
March 2017: Facts, Views & Vision in ObGyn
https://www.readbyqxmd.com/read/28708521/flow-cytometric-enrichment-of-pacific-bluefin-tuna-type-a-spermatogonia-based-on-light-scattering-properties
#2
REVIEW
Kensuke Ichida, Kazuyoshi Kise, Tetsuro Morita, Ryosuke Yazawa, Yutaka Takeuchi, Goro Yoshizaki
We previously established surrogate broodstock in which the donor germ cells transplanted into the peritoneal cavities of xenogeneic recipients were capable of developing into functional eggs and sperm in teleost fish. In this transplantation system, only the undifferentiated germ cells such as type A spermatogonia (ASG) or a portion of the ASG population were capable of being incorporated into the genital ridges of the recipients and undergo gametogenesis. Therefore, the use of enriched ASGs can be expected to achieve efficient donor-cell incorporation...
June 22, 2017: Theriogenology
https://www.readbyqxmd.com/read/28697908/sperm-donor-conception-and-disclosure-to-children-a-10-year-retrospective-follow-up-study-of-parental-attitudes-in-one-french-center-for-the-study-and-preservation-of-eggs-and-sperm-cecos
#3
Thierry Lassalzede, Marine Paci, Jocelyne Rouzier, Sophie Carez, Audrey Gnisci, Jacqueline Saias-Magnan, Carole Deveze, Jeanne Perrin, Catherine Metzler-Guillemain
OBJECTIVE: To evaluate the percentage of parents in one French center for the study and preservation of eggs and sperm who disclose their use of donated spermatozoa to their children. DESIGN: A questionnaire survey of couples who had a child using donated spermatozoa. SETTING: University hospital laboratory. PATIENT(S): One hundred five couples. INTERVENTION(S): Questionnaire sent by mail. MAIN OUTCOME MEASURE(S): The percentage of parents who disclose their use of donated spermatozoa to their child...
July 8, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28697393/same-medicine-different-reasons-comparing-women-s-bodily-experiences-of-producing-eggs-for-pregnancy-or-for-profit
#4
Rene Almeling, Iris L Willey
Women doing in vitro fertilization (IVF) to have a child describe it as painful and emotionally draining. Egg donors undergo the same medical regimen for a different reason - to produce eggs for another woman in exchange for thousands of dollars - and describe it as quick and relatively painless. Medical researchers typically compare bodily responses by variables such as gender, age, and health status. We use the case of "egg production" to propose a new factor that may be an important source of variation in bodily experience: an individual's reason for undergoing the medical intervention in the first place...
June 22, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28686488/contribution-of-both-b-cell-intrinsic-alterations-as-well-as-non-hematopoietic-derived-factors-in-the-enhanced-immune-response-of-the-nod-mouse
#5
Viqar Showkat Banday, Radha Thyagarajan, Kristina Lejon
The underlying cellular and molecular mechanism for the development of Type 1 diabetes is still to be fully revealed. We have previously demonstrated that the NOD mouse, a model for Type 1 diabetes, display a prolonged and enhanced immune response to both self and non-self-antigens. The molecular explanation for this defect however, has not been determined. In this study we immunized NOD and C57BL/6 (B6) with the conventional antigen i.e. hen egg lysozyme (HEL) and analyzed B cell activation, germinal center reaction and antibody clearance...
July 7, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28683668/kinship-identities-in-the-context-of-uk-maternal-spindle-transfer-and-pronuclear-transfer-legislation
#6
Calum MacKellar
In the discussions leading up to the enactment of the UK Human Fertilisation and Embryology (Mitochondrial Donation) Regulations 2015, it was repeatedly emphasised, by many commentators, that maternal spindle transfer (MST) and pronuclear transfer (PNT) did not give rise to children who could be considered as having three or more parents. This was because it was argued that only the genetic material found in the chromosomes should be considered as the determining factor for the formation of parent-child relationships and the resulting kinship identities...
July 6, 2017: New Bioethics: a Multidisciplinary Journal of Biotechnology and the Body
https://www.readbyqxmd.com/read/28663368/betaine-is-accumulated-via-transient-choline-dehydrogenase-activation-during-mouse-oocyte-meiotic-maturation
#7
Taylor McClatchie, Megan Meredith, Mariame O Ouédraogo, Sandy Slow, Michael Lever, Mellissa R W Mann, Steven H Zeisel, Jacquetta M Trasler, Jay M Baltz
Betaine (N,N,N-trimethylglycine) plays key roles in mouse eggs and preimplantation embryos first in a novel mechanism of cell volume regulation and second as a major methyl donor in blastocysts, but its origin is unknown. Here, we determined that endogenous betaine was present at low levels in germinal vesicle (GV) stage mouse oocytes before ovulation, but reached high levels in the mature, ovulated egg. However, no betaine transport into oocytes was detected during meiotic maturation. Since betaine can be synthesized in mammalian cells via choline dehydrogenase (CHDH; EC1...
June 29, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28635412/gamete-donors-reasons-for-and-expectations-and-experiences-of-registration-with-a-voluntary-donor-linking-register
#8
Eric Blyth, Marilyn Crawshaw, Lucy Frith, Olga van den Akker
This paper reports on a study of the views and experiences of 21 sperm donors and five egg donors registered with UK DonorLink (UKDL), a voluntary DNA-based contact register established to facilitate contact between adults who wish to identify and locate others to whom they are genetically related following donor conception. Specifically, the paper examines donors' reasons for searching for, or making information about themselves available to donor-conceived offspring. Their expectations of registration with UKDL, experiences of being registered and finally, the experiences of those who had contacted donor-conceived offspring and other genetic relatives are investigated...
February 21, 2017: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/28625761/impact-of-vitamin-d-levels-on-ovarian-reserve-and-ovarian-response-to-ovarian-stimulation-in-oocyte-donors
#9
Alberta Maria Fabris, Maria Cruz, Carlos Iglesias, Alberto Pacheco, Azadeh Patel, Jayesh Patel, Human Fatemi, Juan Antonio García-Velasco
Recently, growing interest in vitamin D has emerged from findings that demonstrate a low vitamin D status in populations. Similarly, much interest has been shown in the role that anti-Müllerian hormone (AMH) plays in reproductive physiology. Considerable confusion as to whether vitamin D status is related to ovarian function can be found in the literature. Our retrospective study was performed from June 2014 to April 2015. Oocyte donors were recruited and stimulated under the antagonist protocol with gonadotrophin-releasing hormone (GnRH) agonist to trigger ovulation...
May 19, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28589355/germinal-center-formation-with-retrovirally-transduced-b-cells-for-determining-the-role-of-specific-molecules-in-vivo
#10
Rinako Nakagawa
Retrovirus-mediated gene transfer has become a powerful tool to investigate roles of specific molecules in B cells, due to its efficiency and expeditiousness. This technology is applicable to activated B cells in order to determine effects of a gene of interest during germinal center (GC) reactions in combination with adoptive transfer. To achieve this, B cells derived from SWHEL mice expressing hen egg lysozyme (HEL)-specific B cell receptors (BCR) are stimulated with HEL antigen in vivo and then with anti-CD40 antibody ex vivo...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28554074/photochemistry-and-mechanism-of-designed-pyrenyl-probe-towards-promoted-cleavage-of-proteins
#11
Sudarat Yenjai, Mayuso Kuno, Siritron Samosorn, Teerayuth Liwporncharoenvong, Apinya Buranaprapuk
A new photochemical reagent, succinic acid-1(1-pyrene)methylamide (PMA-SUC), was developed to recognize the specific binding sites on model proteins, egg-white lysozyme and avidin. The interaction of the photochemical reagent with the proteins was studied by UV-Vis, fluorescence spectroscopic methods and docking description. PMA-SUC was found to bind to lysozyme and avidin with binding constants (Kb) of 2.4×10(5) and 6.7×10(5) (M(-1)), respectively. The fluorescence intensity of PMA-SUC decreased with increasing concentration of both proteins...
May 22, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28549399/a-systematic-review-investigating-psychosocial-aspects-of-egg-sharing-in-the-united-kingdom-and-their-potential-effects-on-egg-donation-numbers
#12
Timothy Bracewell-Milnes, Srdjan Saso, Hossam Abdalla, Meen-Yau Thum
This review aims to provide an up-to-date knowledge of the psychosocial aspects of egg donation from the perspectives of the egg share donor and their recipient. It explores the motives, experiences and attitudes of egg sharers and their views towards donor anonymity and disclosure. Conclusions are made on how these findings can guide clinical practice and improve egg sharing numbers. A systematic search of peer-reviewed journals of four computerized databases was undertaken. Eleven studies were included in the review...
May 26, 2017: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/28545561/sources-of-variability-in-the-measurement-of-ascaris-lumbricoides-infection-intensity-by-kato-katz-and-qpcr
#13
Alice V Easton, Rita G Oliveira, Martin Walker, Elise M O'Connell, Sammy M Njenga, Charles S Mwandawiro, Joanne P Webster, Thomas B Nutman, Roy M Anderson
BACKGROUND: Understanding and quantifying the sources and implications of error in the measurement of helminth egg intensity using Kato-Katz (KK) and the newly emerging "gold standard" quantitative polymerase chain reaction (qPCR) technique is necessary for the appropriate design of epidemiological studies, including impact assessments for deworming programs. METHODS: Repeated measurements of Ascaris lumbricoides infection intensity were made from samples collected in western Kenya using the qPCR and KK techniques...
May 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28502526/long-term-preservation-of-eri-and-ailanthus-silkworms-using-frozen-gonads
#14
Hisayoshi Fukumori, Jung Lee, Tsuguru Fujii, Zenta Kajiura, Yutaka Banno
Cryopreservation of eri and ailanthus silkworms using frozen gonads was investigated. First, we evaluated the freeze tolerance of ovary and testis in the eri silkworm, which showed high tolerance. Mating between frozen ovary-transplanted females and frozen testis-transplanted males produced 163.0 eggs, yielding 105.7 larvae per moth. In a second experiment, we tested the use of the eri silkworm as a host insect for gonad transplantation from ailanthus silkworm donors. A high success ratio for laid and hatched eggs was demonstrated for ovary transplantation (97...
May 11, 2017: Cryobiology
https://www.readbyqxmd.com/read/28480049/discrete-survival-model-analysis-of-a-couple-s-smoking-pattern-and-outcomes-of-assisted-reproduction
#15
Jose C Vanegas, Jorge E Chavarro, Paige L Williams, Jennifer B Ford, Thomas L Toth, Russ Hauser, Audrey J Gaskins
BACKGROUND: Cigarette smoking has been associated with worse infertility treatment outcomes, yet some studies have found null or inconsistent results. METHODS: We followed 225 couples who underwent 354 fresh non-donor assisted reproductive technology (ART) cycles between 2006 and 2014. Smoking history was self-reported at study entry. We evaluated the associations between smoking patterns and ART success using multivariable discrete time Cox proportional hazards models with six time periods: cycle initiation to egg retrieval, retrieval to fertilization, fertilization to embryo transfer (ET), ET to implantation, implantation to clinical pregnancy, and clinical pregnancy to live birth to estimate hazard ratios (HR) and 95% CIs...
2017: Fertility Research and Practice
https://www.readbyqxmd.com/read/28479754/effect-of-body-mass-index-on-the-outcome-of-in-vitro-fertilization-intracytoplasmic-sperm-injection-in-women
#16
Manish Banker, Dipesh Sorathiya, Sandeep Shah
BACKGROUND: Obesity, a known epidemic, is a leading cause of various reproductive disorders. Association of body mass index (BMI) with pregnancy outcomes, either ovarian or endometrial, is controversial and least elucidated. AIM: This study aimed to analyze the effect of BMI on in-vitro fertilization (IVF)/intracytoplasmic sperm injection (ICSI) outcome in women using self-oocytes, embryos prepared from donor oocytes (DE), or vitrified/frozen embryos (VE) obtained from both the SE and DE groups...
January 2017: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28473127/long-term-breast-cancer-risk-following-ovarian-stimulation-in-young-egg-donors-a-call-for-follow-up-research-and-informed-consent
#17
Jennifer Schneider, Jennifer Lahl, Wendy Kramer
In the USA and other countries, oocyte donation is gaining increasing importance. Although sufficient data exist on procedure-associated short-term risks for oocyte donors, such as ovarian hyperstimulation syndrome, long-term follow-up studies of egg donors are lacking and their health risks are unknown. The lack of information may be misleadingly interpreted as lack of risk. Long-term hormone replacement therapy is recognized as a risk factor for breast cancer; the breast cancer risk of ovarian stimulation for egg donors is unknown but is a possibility...
May 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28463912/dna-genotyping-of-nonmolar-donor-egg-pregnancies-with-abnormal-villous-morphology-allele-zygosity-patterns-prevent-misinterpretation-as-complete-hydatidiform-mole
#18
Nancy M Joseph, Caryll Pineda, Joseph T Rabban
DNA genotyping is the gold standard diagnostic test to distinguish hydatidiform moles from nonmolar but morphologically abnormal products of conception (POC). The test is based on comparison of alleles at 15 short tandem repeat loci in the chorionic villi of the POC to those in the maternal decidual tissue. If alleles in the POC are not present in the decidua, then the most concerning interpretation is that the POC has a paternal uniparental genome diagnostic of a complete hydatidiform mole (CHM). However, a nonmolar pregnancy from a donated egg would also appear the same because the maternal genome of the POC would match that of the maternal donor, not that of the decidua of the individual carrying the pregnancy...
April 29, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28428126/interactions-of-tetracyclines-with-ovalbumin-the-main-allergen-protein-from-egg-white-spectroscopic-and-electrophoretic-studies
#19
Maria Dayanne de A Dantas, Humberto de Araújo Tenório, Thiago Inácio B Lopes, Hugo Juarez V Pereira, Anita J Marsaioli, Isis M Figueiredo, Josué Carinhanha Caldas Santos
The interactions of tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC) with ovalbumin (OVA), the main allergen protein of egg white, were investigated by molecular spectroscopy and electrophoresis at three pH conditions (1.5, 4.6 and 7.4). Molecular and synchronous fluorescence, UV-vis spectroscopy, electrophoresis and (1)H NMR were used to study the interaction process. Tetracyclines interact with ovalbumin fluorescence by a static quenching mechanism with non-fluorescent complex formation changing the native protein structure...
September 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28421498/chapter-14-establishing-an-oocyte-cryobank-network
#20
James Graham, Josh Lim, Michael Tucker
Improvements in oocyte cryopreservation has prompted wider acceptance of this technology leading to its use for several reasons. Notably, in addition to elective and medically driven reasons for oocyte cryostorage for fertility preservation, donor oocyte cryobanking is beginning to gain traction, potentially replacing fresh oocyte donation in assisted reproduction. Donor "egg banking," while not totally analogous to donor sperm banking, does provide strong benefits in terms of scheduling flexibility and improved clinical efficiencies, while providing a wider immediate inventory choice...
2017: Methods in Molecular Biology
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