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https://www.readbyqxmd.com/read/28102433/advanced-forensic-validation-for-human-spermatozoa-identification-using-sperm-hy-liter%C3%A2-express-with-quantitative-image-analysis
#1
Ayari Takamura, Ken Watanabe, Tomoko Akutsu
Identification of human semen is indispensable for the investigation of sexual assaults. Fluorescence staining methods using commercial kits, such as the series of SPERM HY-LITER™ kits, have been useful to detect human sperm via strong fluorescence. These kits have been examined from various forensic aspects. However, because of a lack of evaluation methods, these studies did not provide objective, or quantitative, descriptions of the results nor clear criteria for the decisions reached. In addition, the variety of validations was considerably limited...
January 19, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28102039/a-dispermic-chimerism-detected-in-a-taiwanese-potential-unrelated-hematopoietic-stem-cell-donor
#2
E K L Yang, S G E Marsh, P-Y Chen, C-P Chen, S-P Chen, P Y Lin
Chimerism is defined as the presence of 2 or more than 1 genetically distinct cell populations in an organism. Dispermic chimeras are derived from the fertilization of 1 or 2 matured nuclei by 2 sperms. We here report detection of a healthy and phenotypically normal female with normal ABO red blood cell typing in whom dispermic chimerism was suspected after 3 alleles were identified at multiple human leukocyte antigen (HLA) loci using molecular HLA analysis. Molecular HLA typing showed the donor to have 3 HLA-A, -B, -C, -DRB1, -DQB1 and -DPB1 alleles in blood, saliva and nail samples...
February 2017: HLA
https://www.readbyqxmd.com/read/28100869/gonadotoropin-actions-on-spermatogenesis-and-hormonal-therapies-for-spermatogenic-disorders-review
#3
Koji Shiraishi, Hideyasu Matsuyama
Microdissection testicular sperm extraction and intracytoplasmic sperm injection have made it possible for men with non-obstructive azoospermia (NOA) to conceive a child. A majority of men cannot produce sperm because spermatogenesis per se is believed to be "irreversibly" disturbed. For these men, it and has been thought that any hormonal therapy will be ineffective. Further understandings of endocrinological regulation of spermatogenesis are needed and LH or FSH receptor knock out (KO) mice have revealed the roles of gonadotropin separately...
January 19, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28100703/paternal-epigenetic-programming-evolving-metabolic-disease-risk
#4
Suzy Sj Hur, Jennifer E Cropley, Catherine M Suter
Parental health or exposures can affect the lifetime health outcomes of offspring, independently of inherited genotypes. Such 'epigenetic' effects occur over a broad range of environmental stressors, including defects in parental metabolism. While maternal metabolic effects are well documented, it has only recently been established that that there is also an independent paternal contribution to long-term metabolic health. Both paternal undernutrition and overnutrition can induce metabolic phenotypes in immediate offspring, and in some cases the induced phenotype can affect multiple generations, implying inheritance of an acquired trait...
January 18, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28093975/molecular-modeling-and-dynamics-simulation-analysis-of-katnal1-for-identification-of-novel-inhibitor-of-sperm-maturation
#5
Kishore Sarma, Shubhadeep Roychoudhury, Sudipta Sankar Bora, Budheswar Dehury, Pratap Parida, Saurav Das, Robin Das, Chandrajit Dohutia, Sangeeta Nath, Bibhas Deb, Mahendra K Modi
Rapid growth of world population is one of the biggest challenges faced by the human race. Hormone based birth control often causes various side effects, as such development of non-hormonal based contraceptives is the need of the hour. A recent study revealed that temporary infertility without changing hormone levels can be attained by inhibiting Katanin p60 ATPase-containing subunit A-like 1 protein (KATNAL1) which is critical in sperm maturation in the testes. This study revealed that, KATNAL1 is a soluble protein retained in the cytoplasm having molecular weight of 55,392 Dalton...
January 16, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/28093649/naturalistic-experimental-designs-as-tools-for-understanding-the-role-of-genes-and-the-environment-in-prevention-research
#6
Leslie D Leve, Jenae M Neiderhiser, Gordon T Harold, Misaki N Natsuaki, Brendan J M Bohannan, William A Cresko
Before genetic approaches were applied in experimental studies with human populations, they were used by animal and plant breeders to observe, and experimentally manipulate, the role of genes and environment on specific phenotypic or behavioral outcomes. For obvious ethical reasons, the same level of experimental control is not possible in human populations. Nonetheless, there are natural experimental designs in human populations that can serve as logical extensions of the rigorous quantitative genetic experimental designs used by animal and plant researchers...
January 16, 2017: Prevention Science: the Official Journal of the Society for Prevention Research
https://www.readbyqxmd.com/read/28090457/glucose-6-phosphate-dehydrogenase-deficiency-does-not-increase-the-susceptibility-of-sperm-to-oxidative-stress-induced-by-h2o2
#7
Shiva Roshankhah, Zahra Rostami-Far, Farhad Shaveisi-Zadeh, Abolfazl Movafagh, Mitra Bakhtiari, Jila Shaveisi-Zadeh
OBJECTIVE: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most common human enzyme defect. G6PD plays a key role in the pentose phosphate pathway, which is a major source of nicotinamide adenine dinucleotide phosphate (NADPH). NADPH provides the reducing equivalents for oxidation-reduction reductions involved in protecting against the toxicity of reactive oxygen species such as H2O2. We hypothesized that G6PD deficiency may reduce the amount of NADPH in sperms, thereby inhibiting the detoxification of H2O2, which could potentially affect their motility and viability, resulting in an increased susceptibility to infertility...
December 2016: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28088501/a-review-of-reproductive-and-developmental-toxicity-of-silver-nanoparticles-in-laboratory-animals
#8
REVIEW
Makoto Ema, Hirokazu Okuda, Masashi Gamo, Kazumasa Honda
We summarized significant effects reported in the literature on the reproductive and developmental toxicity of silver nanoparticles (AgNPs) in laboratory animals. AgNPs showed testicular/sperm toxicity in males and ovarian and embryonic toxicity in females. Maternal injection of AgNPs delayed physical development and impaired cognitive behavior in offspring. Ag was accumulated in the testes after administration of AgNPs. AgNPs were identified in the visceral yolk sac after administration during early gestation in mice...
January 11, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28079304/localized-measurements-of-physical-parameters-within-human-sperm-cells-obtained-with-wide-field-interferometry
#9
Michal Balberg, Mattan Levi, Ksawery Kalinowski, Itay Barnea, Simcha K Mirsky, Natan T Shaked
We developed a new method to identify the separate cellular compartments in the optical path delay (OPD) maps of un-labeled spermatozoa. This was conducted by comparing OPD maps of fixed, un-labeled spermatozoa to bright field images of the same cells following labeling. The labeling enabled us to identify the acrosomal and nuclear compartments in the corresponding OPD maps of the cells. We then extracted the refractive index maps of fixed cells by dividing the OPD maps of spermatozoa by the corresponding thickness maps of the same cells, obtained with AFM...
January 12, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28078721/use-of-the-fluorescent-dye-tetramethylrhodamine-methyl-ester-perchlorate-for-mitochondrial-membrane-potential-assessment-in-human-spermatozoa
#10
P Uribe, J V Villegas, R Boguen, F Treulen, R Sánchez, P Mallmann, V Isachenko, G Rahimi, E Isachenko
Mitochondrial membrane potential (ΔΨm) is an indicator of sperm quality and its evaluation complements the standard semen analysis. The fluorescent dye JC-1 has been widely used to assess sperm ΔΨm; however, some problems have been detected under certain experimental conditions. Another fluorescent compound, tetramethylrhodamine methyl ester perchlorate (TMRM), has been used in somatic cells and bovine spermatozoa but not in human spermatozoa. TMRM accumulates in hyperpolarised mitochondria and the fluorescence intensity of this compound correlates with ΔΨm...
January 11, 2017: Andrologia
https://www.readbyqxmd.com/read/28077244/the-catsper-channel-modulates-boar-sperm-motility-during-capacitation
#11
Alejandro Vicente-Carrillo, Manuel Álvarez-Rodríguez, Heriberto Rodríguez-Martínez
The cation channel of sperm (CatSper) comprises four transmembrane subunits specifically expressed in human, equine, murine and ovine spermatozoa, apparently implicated in capacitation, hyperactivation and acrosome exocytosis. Western blotting and immunocytochemistry showed hereby that CatSper subunits are also present in boar spermatozoa, primarily over the sperm neck, tail and cytoplasmic droplets; albeit CatSper -1 presented in addition some distribution over the membrane of the acrosome and CatSper -2 and -4 over the membrane of the post-acrosome...
January 8, 2017: Reproductive Biology
https://www.readbyqxmd.com/read/28069933/no-correlation-between-mtdna-amount-and-methylation-levels-at-the-cpg-island-of-polg-exon-2-in-wild-type-and-mutant-human-differentiated-cells
#12
Julie Steffann, Aurore Pouliet, Houda Adjal, Christine Bole, Cécile Fourrage, Jelena Martinovic, Louise Rolland-Galmiche, Agnes Rotig, Frédéric Tores, Arnold Munnich, Jean-Paul Bonnefont
BACKGROUND: While mitochondrial DNA (mtDNA) copy number is strictly regulated during differentiation and according to cell type, very little is known regarding the mechanism which accurately controls mtDNA copy number in human. Exon 2 of the human POLG gene, encoding the catalytic subunit of the mitochondrial-specific DNA polymerase gamma, contains a CpG island, highly conserved in mice and human. Changes of DNA methylation at the POLG locus have been shown to modulate mtDNA copy number during cell differentiation in both mouse and human...
January 9, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28069183/evaluation-of-in%C3%A2-vitro-fertilization-outcomes-using-interleukin-8-in-culture-medium-of-human-preimplantation-embryos
#13
Guanyou Huang, Congrong Zhou, Chi-Ju Wei, Shuyun Zhao, Fa Sun, Hua Zhou, Wenjie Xu, Jun Liu, Chao Yang, Lingfei Wu, Guidan Ye, Zhuo Chen, Yongli Huang
OBJECTIVE: To investigate whether selected cytokines are detectable in the embryo culture medium (EM) of human preimplantation embryos (HPE) and what the relationship is of the cytokines with clinical outcomes. DESIGN: Cross-sectional study. SETTING: University-affiliated tertiary teaching hospital. PATIENT(S): Three-hundred and thirty infertile women who underwent fresh cycle in vitro fertilization (IVF) between January and December 2014...
January 6, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28067604/central-hypogonadism-due-to-a-giant-silent-fsh-secreting-atypical-pituitary-adenoma-effects-of-adenoma-dissection-and-short-term-leydig-cell-stimulation-by-luteinizing-hormone-lh-and-human-chorionic-gonadotropin-hcg
#14
Daniele Santi, Giorgia Spaggiari, Livio Casarini, Flaminia Fanelli, Marco Mezzullo, Uberto Pagotto, Antonio R M Granata, Cesare Carani, Manuela Simoni
We present a case report of an atypical giant pituitary adenoma secreting follicle-stimulating hormone (FSH). A 55-year-old patient presented for erectile dysfunction, loss of libido and fatigue. The biochemical evaluation showed very high FSH serum levels in the presence of central hypogonadism. Neither testicular enlargement nor increased sperm count was observed, thus a secretion of FSH with reduced biological activity was supposed. The histological examination after neuro-surgery showed an atypical pituitary adenoma with FSH-positive cells...
January 9, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28063926/luteinizing-hormone-modulates-intracellular-calcium-protein-tyrosine-phosphorylation-and-motility-during-human-sperm-capacitation
#15
Aideé S López-Torres, María E González-González, Esperanza Mata-Martínez, Fernando Larrea, Claudia L Treviño, Mayel Chirinos
In order to fertilize, spermatozoa must undergo physiological and biochemical changes during their transit along the female reproductive tract before reaching and fusing with the oocyte, process known as capacitation. Sperm modifications associated with capacitation are modulated by their interaction with molecules present in the female reproductive tract. During the woman fertile window, some reproductive hormones reach their maximum concentrations in serum, such as the luteinizing hormone (LH). Since spermatozoa preparing to fertilize may be exposed to LH, the purpose of this work was to study the effects of this hormone on intracellular Ca(2+) concentrations ([Ca(2+)]i), protein tyrosine phosphorylation, sperm motility and acrosome reaction under capacitating conditions...
January 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28062807/junctional-adhesion-molecule-a-expression-in-the-murine-epididymal-tract-and-accessory-organs-and-acquisition-by-maturing-sperm
#16
Kathie Z Wu, Kun Li, Deni S Galileo, Patricia A Martin-DeLeon
STUDY QUESTION: Is junctional adhesion molecule A (JAM-A), a sperm protein essential for normal motility, expressed in the murine post-testicular pathway and involved in sperm maturation? SUMMARY ANSWER: JAM-A is present in the prostate and seminal vesicles and in all three regions of the epididymis where it is secreted in epididymosomes in the luminal fluid and can be delivered to sperm in vitro. WHAT IS KNOWN ALREADY: JAM-A shares with the plasma membrane Ca(2+)ATPase 4 (PMCA4, the major Ca(2+) efflux pump in murine sperm) a common interacting partner, CASK (Ca(2+)/CaM-dependent serine kinase)...
January 6, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28062561/sperm-sensory-signaling
#17
Dagmar Wachten, Jan F Jikeli, U Benjamin Kaupp
Fertilization is exceptionally complex and, depending on the species, happens in entirely different environments. External fertilizers in aquatic habitats, like marine invertebrates or fish, release their gametes into the seawater or freshwater, whereas sperm from most internal fertilizers like mammals cross the female genital tract to make their way to the egg. Various chemical and physical cues guide sperm to the egg. Quite generally, these cues enable signaling pathways that ultimately evoke a cellular Ca(2+) response that modulates the waveform of the flagellar beat and, hence, the swimming path...
January 6, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28057448/improved-cryotolerance-and-developmental-competence-of-human-oocytes-matured-in-vitro-by-transient-hydrostatic-pressure-treatment-prior-to-vitrification
#18
Ruihuan Gu, Yun Feng, Song Guo, Shen Zhao, Xiaowei Lu, Jing Fu, Xiaoxi Sun, Yijuan Sun
BACKGROUND: At present, the metaphase II (MII) oocytes have a very special structure that leads to complex difficulties associated with its vitrification, and their efficacy still needs a large amount of study to observe. The present study was to investigate whether transient hydrostatic pressure (THP), which was utilized for oocytes before vitrification, had positive effect on the oocytes' developmental ability and reactive oxygen species, and had no damage on meiotic spindle, zona pellucida, and DNA copy number...
January 2, 2017: Cryobiology
https://www.readbyqxmd.com/read/28057306/the-drosophila-accessory-gland-as-a-model-for-prostate-cancer-and-other-pathologies
#19
C Wilson, A Leiblich, D C I Goberdhan, F Hamdy
The human prostate is a gland of the male reproductive tract, which together with the seminal vesicles, is responsible for most seminal fluid production. It is a common site of cancer, and unlike other glands, it typically enlarges in aging men. In flies, the male accessory glands make many major seminal fluid components. Like their human equivalents, they secrete proteins from several conserved families, including proteases, lectins, and cysteine-rich secretory proteins, some of which interact with sperm and affect fertility...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28056983/influence-of-endometrial-thickness-on-treatment-outcomes-following-in-vitro-fertilization-intracytoplasmic-sperm-injection
#20
Ning-Zhao Ma, Lei Chen, Wei Dai, Zhi-Qin Bu, Lin-Li Hu, Ying-Pu Sun
BACKGROUND: The study was designed to investigate the roles of endometrial thickness (EMT) at the day of human chorionic gonadotropin (hCG) administration on pregnancy outcomes in a large patient population. METHODS: This retrospective cohort study included 9,952 patients undergoing their first IVF/ICSI with autologous oocytes from January 2011 to January 2015. Patients were divided into three groups based on the EMT (group A:≤8 mm; group B: 9-14 mm and group C:≥15 mm)...
January 5, 2017: Reproductive Biology and Endocrinology: RB&E
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