Incorporation of the Acrosome Into the Oocyte During Intracytoplasmic Sperm Injection Could Be Potentially Hazardous to Embryo Development
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Expression and Localization of Myosin VI in Developing Mouse Spermatids
Histochem Cell Biol DOI 10.1007/s00418-017-1579-z ORIGINAL PAPER Expression and localization of myosin VI in developing mouse spermatids Przemysław Zakrzewski1 · Robert Lenartowski2 · Maria Jolanta Re˛dowicz3 · Kathryn G. Miller4 · Marta Lenartowska1 Accepted: 4 May 2017 © The Author(s) 2017. This article is an open access publication Abstract Myosin VI (MVI) is a versatile actin-based and Sertoli cell actin hoops. Since this is the frst report of motor protein that has been implicated in a variety of dif- MVI expression and localization during mouse spermio- ferent cellular processes, including endo- and exocytic genesis and MVI partners in developing sperm have not yet vesicle traffcking, Golgi morphology, and actin structure been identifed, we discuss some probable roles for MVI stabilization. A role for MVI in crucial actin-based pro- in this process. During early stages, MVI is hypothesized cesses involved in sperm maturation was demonstrated in to play a role in Golgi morphology and function as well Drosophila. Because of the prominence and importance of as in actin dynamics regulation important for attachment actin structures in mammalian spermiogenesis, we inves- of developing acrosome to the nuclear envelope. Next, tigated whether MVI was associated with actin-mediated the protein might also play anchoring roles to help gener- maturation events in mammals. Both immunofuorescence ate forces needed for spermatid head elongation. Moreo- and ultrastructural analyses using immunogold labeling ver, association of MVI with actin that accumulates in showed that MVI was strongly linked with key structures the Sertoli cell ectoplasmic specialization and other actin involved in sperm development and maturation. -
Effect of Paternal Age on Aneuploidy Rates in First Trimester Pregnancy Loss
Journal of Medical Genetics and Genomics Vol. 2(3), pp. 38-43, August 2010 Available online at http://www.academicjournals.org/jmgg ©2010 Academic Journals Full Length Research Paper Effect of paternal age on aneuploidy rates in first trimester pregnancy loss Vitaly A. Kushnir, Richard T. Scott and John L. Frattarelli 1Department of Obstetrics, Gynecology and Women’s Health, New Jersey Medical School, MSB E-506, 185 South Orange Avenue, Newark, NJ, 07101-1709, USA. 2Department of Obstetrics, Gynecology and Reproductive Sciences, Robert Wood Johnson Medical School UMDNJ, Division of Reproductive Endocrinology and Infertility, New Brunswick, NJ. Reproductive Medicine Associates of New Jersey, Morristown NJ, USA. Accepted 16 July, 2010 A retrospective cohort analysis of patients undergoing IVF cycles at an academic IVF center was performed to test the hypothesis that male age may influence aneuploidy rates in first trimester pregnancy losses. All patients had a first trimester pregnancy loss followed by evacuation of the pregnancy and karyotyping of the abortus. Couples undergoing anonymous donor oocyte ART cycles (n = 50) and 23 couples with female age less than 30 years undergoing autologous oocyte ART cycles were included. The oocyte age was less than 30 in both groups; thereby allowing the focus to be on the reproductive potential of the aging male. The main outcome measure was the effect of paternal age on aneuploidy rate. No increase in aneuploidy rate was noted with increasing paternal age (<40 years = 25.0%; 40-50 years = 38.8%; >50 years = 25.0%). Although there was a significant difference in the male partner age between oocyte recipients and young patients using autologous oocytes (33.7 7.6 vs. -
Oogenesis [PDF]
Oogenesis Dr Navneet Kumar Professor (Anatomy) K.G.M.U Dr NavneetKumar Professor Anatomy KGMU Lko Oogenesis • Development of ovum (oogenesis) • Maturation of follicle • Fate of ovum and follicle Dr NavneetKumar Professor Anatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Oogenesis • Site – ovary • Duration – 7th week of embryo –primordial germ cells • -3rd month of fetus –oogonium • - two million primary oocyte • -7th month of fetus primary oocyte +primary follicle • - at birth primary oocyte with prophase of • 1st meiotic division • - 40 thousand primary oocyte in adult ovary • - 500 primary oocyte attain maturity • - oogenesis completed after fertilization Dr Navneet Kumar Dr NavneetKumar Professor Professor (Anatomy) Anatomy KGMU Lko K.G.M.U Development of ovum Oogonium(44XX) -In fetal ovary Primary oocyte (44XX) arrest till puberty in prophase of 1st phase meiotic division Secondary oocyte(22X)+Polar body(22X) 1st phase meiotic division completed at ovulation &enter in 2nd phase Ovum(22X)+polarbody(22X) After fertilization Dr NavneetKumar Professor Anatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Dr Navneet Kumar Dr ProfessorNavneetKumar (Anatomy) Professor K.G.M.UAnatomy KGMU Lko Dr NavneetKumar Professor Anatomy KGMU Lko Maturation of follicle Dr NavneetKumar Professor Anatomy KGMU Lko Maturation of follicle Primordial follicle -Follicular cells Primary follicle -Zona pallucida -Granulosa cells Secondary follicle Antrum developed Ovarian /Graafian follicle - Theca interna &externa -Membrana granulosa -Antrial -
Sperm Capacitation in Surgicallyinseminated Gilts
Regional influences of the Fallopian tubes on the rate of boar sperm capacitation in surgically inseminated gilts R. H. F. Hunter, W. T. Huang and W. Holtz Institute ofAnimal Physiology and Genetics, University of Göttingen, Albrecht-Thaer-Weg 3, D-37075 Göttingen, Germany Aliquots of ejaculated boar semen containing known numbers of spermatozoa were deposited into the caudal isthmus or rostral ampulla of the Fallopian tubes of gilts at, or immediately after, ovulation to assess regional influences on the rate of capacitation. Eggs were recovered during a second intervention 4, 5, 6 or 7 h after surgical insemination and were examined by phase-contrast microscopy. Results were obtained from ten animals in each of the 4-, 5- and 6-h groups and from eight animals in the 7-h group. With two exceptions, fertilized eggs were not recovered until 6 h after insemination into the isthmus, the proportion (45.6%) being significantly greater than the corresponding figure (1.4%) for ampullary insemination (P < 0.001). Similarly, the proportion of fertilized eggs recovered 7 h after insemination into the isthmus (58.7%) was significantly greater than after ampullary insemination (21.9%; P < 0.01). Numbers of spermatozoa associated with the zona pellucida remained low in all these instances, with mean figures per egg ranging from 0.3 to 3.8. Insemination into the isthmus gave a 1\p=n-\2h advantage in fertilization compared with insemination into the ampulla. Although relative rates of sperm cell progression to the site of fertilization may have contributed to this, there is strong evidence that rates of capacitation differ significantly in the respective portions of the Fallopian tube. -
Progression from Meiosis I to Meiosis II in Xenopus Oocytes Requires De
Proc. Natl. Acad. Sci. USA Vol. 88, pp. 5794-5798, July 1991 Biochemistry Progression from meiosis I to meiosis II in Xenopus oocytes requires de novo translation of the mosxe protooncogene (cell cycle/protein kinase/maturation-promoting factor/germinal vesicle breakdown) JOHN P. KANKI* AND DANIEL J. DONOGHUEt Department of Chemistry, Division of Biochemistry and Center for Molecular Genetics, University of California at San Diego, La Jolla, CA 92093-0322 Communicated by Russell F. Doolittle, March 22, 1991 ABSTRACT The meiotic maturation of Xenopus oocytes controlling entry into and exit from M phase (for reviews, see exhibits an early requirement for expression of the mosxe refs. 17-19). protooncogene. The mosxc protein has also been shown to be a In Xenopus, protein synthesis is required for the initiation component of cytostatic factor (CSF), which is responsible for of meiosis I and also meiosis II (4, 20), even though stage VI arrest at metaphase ofmeiosis II. In this study, we have assayed oocytes already contain both p34cdc2 and cyclin (12, 21). the appearance of CSF activity in oocytes induced to mature These proteins are partially complexed in an inactive form of either by progesterone treatment or by overexpression ofmosxe. MPF (preMPF) that appears to be normally inhibited by a Progesterone-stimulated oocytes did not exhibit CSF activity protein phosphatase activity called "INH" (22, 23). These until 30-60 min after germinal vesicle breakdown (GVBD). observations indicate a translational requirement, both for Both the appearance of CSF activity and the progression from the initiation of maturation and for progression to meiosis II, meiosis I to meiosis II were inhibited by microinjection of mos"e for a regulatory factor(s) other than cyclin. -
Oocyte Or Embryo Donation to Women of Advanced Reproductive Age: an Ethics Committee Opinion
ASRM PAGES Oocyte or embryo donation to women of advanced reproductive age: an Ethics Committee opinion Ethics Committee of the American Society for Reproductive Medicine American Society for Reproductive Medicine, Birmingham, Alabama Advanced reproductive age (ARA) is a risk factor for female infertility, pregnancy loss, fetal anomalies, stillbirth, and obstetric com- plications. Oocyte donation reverses the age-related decline in implantation and birth rates of women in their 40s and 50s and restores pregnancy potential beyond menopause. However, obstetrical complications in older patients remain high, particularly related to oper- ative delivery and hypertensive and cardiovascular risks. Physicians should perform a thorough medical evaluation designed to assess the physical fitness of a patient for pregnancy before deciding to attempt transfer of embryos to any woman of advanced reproductive age (>45 years). Embryo transfer should be strongly discouraged or denied to women of ARA with underlying conditions that increase or exacerbate obstetrical risks. Because of concerns related to the high-risk nature of pregnancy, as well as longevity, treatment of women over the age of 55 should generally be discouraged. This statement replaces the earlier ASRM Ethics Committee document of the same name, last published in 2013 (Fertil Steril 2013;100:337–40). (Fertil SterilÒ 2016;106:e3–7. Ó2016 by American Society for Reproductive Medicine.) Key Words: Ethics, third-party reproduction, complications, pregnancy, parenting Discuss: You can discuss -
Female and Male Gametogenesis 3 Nina Desai , Jennifer Ludgin , Rakesh Sharma , Raj Kumar Anirudh , and Ashok Agarwal
Female and Male Gametogenesis 3 Nina Desai , Jennifer Ludgin , Rakesh Sharma , Raj Kumar Anirudh , and Ashok Agarwal intimately part of the endocrine responsibility of the ovary. Introduction If there are no gametes, then hormone production is drastically curtailed. Depletion of oocytes implies depletion of the major Oogenesis is an area that has long been of interest in medicine, hormones of the ovary. In the male this is not the case. as well as biology, economics, sociology, and public policy. Androgen production will proceed normally without a single Almost four centuries ago, the English physician William spermatozoa in the testes. Harvey (1578–1657) wrote ex ovo omnia —“all that is alive This chapter presents basic aspects of human ovarian comes from the egg.” follicle growth, oogenesis, and some of the regulatory mech- During a women’s reproductive life span only 300–400 of anisms involved [ 1 ] , as well as some of the basic structural the nearly 1–2 million oocytes present in her ovaries at birth morphology of the testes and the process of development to are ovulated. The process of oogenesis begins with migra- obtain mature spermatozoa. tory primordial germ cells (PGCs). It results in the produc- tion of meiotically competent oocytes containing the correct genetic material, proteins, mRNA transcripts, and organ- Structure of the Ovary elles that are necessary to create a viable embryo. This is a tightly controlled process involving not only ovarian para- The ovary, which contains the germ cells, is the main repro- crine factors but also signaling from gonadotropins secreted ductive organ in the female. -
Oocyte Polarity: a Sign of Oocyte Quality?
Biology of Reproduction Unit Oocyte polarity: a sign of oocyte quality? Carlos E. Plancha1,2 1 Unidade de Biologia da Reprodução, Inst. Histologia e Biologia do Desenvolvimento, . Faculdade de Medicina de Lisboa, Portugal 2 CEMEARE – Centro Médico de Assistência à Reprodução, Lisboa, Portugal 7th ESHRE Campus on Mammalian Folliculogenesis and Oogenesis Stresa, Italy 19-21 April, 2012 DISCLOSURE CE Plancha does not have any commercial and/or financial relationship with manufacturers of pharmaceuticals, laboratory supplies and/or medical devices. 7th ESHRE Campus on Mammalian Folliculogenesis and Oogenesis Stresa, Italy 19-21 April, 2012 Presentation outline 1. Oocyte quality: impact, acquisition and approaches 2. Oocyte polarity: a feature of oocyte maturation 3. Oocyte polarity: a reflection of oocyte quality? 4. Future challenges 7th ESHRE Campus on Mammalian Folliculogenesis and Oogenesis Stresa, Italy 19-21 April, 2012 Presentation outline 1. Oocyte quality: impact, acquisition and approaches 2. Oocyte polarity: a feature of oocyte maturation 3. Oocyte polarity: a reflection of oocyte quality? 4. Future challenges 7th ESHRE Campus on Mammalian Folliculogenesis and Oogenesis Stresa, Italy 19-21 April, 2012 Oocyte Quality: a major determinant of Embryo Quality and Reproductive Success % Transfers that resulted in Live Births for ART Cycles using Fresh Embryos, from Own and Donor Eggs, by Woman’s Age Oocyte Quality is an oocyte 2008 Assisted Reproductive Technology Report attribute of major relevance in the Centers for Disease Control -
Ultrastrucure of Germ Cells During Spermatogenesis
Korean J. Malacol. 26(1): 33-43, 2010 Ultrastrucure of Germ Cells during Spermatogenesis and Some Characteristics of Sperm Morphology in Male Mytilus coruscus (Bivalvia: Mytilidae) on the West Coast of Korea Jin Hee Kim1, Ee-Yung Chung2, Ki-Ho Choi3, Kwan Ha Park4, and Sung-Woo Park4 1Korea Inter-University Unstitute of Ocean Science, Pukyong National University, Busan 608-737, Korea 2Korea Marine Environment & Ecosystem Institute, Dive Korea, Bucheon 420-857, Korea 3West Sea Fisheries Research Institute, National Fisheries Research and Development Institute, Incheon 400-420, Korea 4Department of Aquatic Life Medicine, Kunsan National University, Kunsan 573-701, Korea ABSTRACT The ultrastructure of germ cells during spermatogenesis and some characteristics of sperm morphology in male Mytilus coruscus, which was collected on the coastal waters of Gyeokpo in western Korea, were investigated by transmission electron microscope observations. The morphology of the spermatozoon has a primitive type and is similar to those of other bivalves in that it contains a short midpiece with five mitochondria surrounding the centrioles. The morphologies of the sperm nucleus type and the acrosome shape of this species have an oval and modified cone shape, respectively. In particular, the axial rod is observed between the nucleus and acrosome of the sperm. The spermatozoon is approximately 45-50 μm in length including a sperm nucleus (about 1.46 μm in length), an acrosome (about 3.94 μm in length) and tail flagellum (approximately 40-45 μm). The axoneme of the sperm tail flagellum consists of nine pairs of microtubules at the periphery and a pair at the center. -
Nomina Histologica Veterinaria, First Edition
NOMINA HISTOLOGICA VETERINARIA Submitted by the International Committee on Veterinary Histological Nomenclature (ICVHN) to the World Association of Veterinary Anatomists Published on the website of the World Association of Veterinary Anatomists www.wava-amav.org 2017 CONTENTS Introduction i Principles of term construction in N.H.V. iii Cytologia – Cytology 1 Textus epithelialis – Epithelial tissue 10 Textus connectivus – Connective tissue 13 Sanguis et Lympha – Blood and Lymph 17 Textus muscularis – Muscle tissue 19 Textus nervosus – Nerve tissue 20 Splanchnologia – Viscera 23 Systema digestorium – Digestive system 24 Systema respiratorium – Respiratory system 32 Systema urinarium – Urinary system 35 Organa genitalia masculina – Male genital system 38 Organa genitalia feminina – Female genital system 42 Systema endocrinum – Endocrine system 45 Systema cardiovasculare et lymphaticum [Angiologia] – Cardiovascular and lymphatic system 47 Systema nervosum – Nervous system 52 Receptores sensorii et Organa sensuum – Sensory receptors and Sense organs 58 Integumentum – Integument 64 INTRODUCTION The preparations leading to the publication of the present first edition of the Nomina Histologica Veterinaria has a long history spanning more than 50 years. Under the auspices of the World Association of Veterinary Anatomists (W.A.V.A.), the International Committee on Veterinary Anatomical Nomenclature (I.C.V.A.N.) appointed in Giessen, 1965, a Subcommittee on Histology and Embryology which started a working relation with the Subcommittee on Histology of the former International Anatomical Nomenclature Committee. In Mexico City, 1971, this Subcommittee presented a document entitled Nomina Histologica Veterinaria: A Working Draft as a basis for the continued work of the newly-appointed Subcommittee on Histological Nomenclature. This resulted in the editing of the Nomina Histologica Veterinaria: A Working Draft II (Toulouse, 1974), followed by preparations for publication of a Nomina Histologica Veterinaria. -
Live Births After Polar Body Biopsy and Frozen-Thawed Cleavage Stage Embryo Transfer: Case Report
JBRA Assisted Reproduction 2016;20(4):253-256 doi: 10.5935/1518-0557.20160049 Case Report Live births after polar body biopsy and frozen-thawed cleavage stage embryo transfer: case report Fernando Guimarães1, Matheus Roque1,2, Marcello Valle1, Alessandra Kostolias1, Rodrigo A de Azevedo1, Ciro D Martinhago3, Marcos Sampaio4, Selmo Geber2,4 1ORIGEN – Center for Reproductive Medicine, Rio de Janeiro/RJ - Brazil 2UFMG – Universidade Federal de Minas Gerais, Belo Horizonte/MG - Brazil 3Chromosome Genomic Medicine, São Paulo/SP - Brazil 4ORIGEN – Center for Reproductive Medicine, Belo Horizonte/MG - Brazil ABSTRACT 2002). To perform the biopsy, it is important to cause a Pre-implantation genetic diagnosis (PGD) or screening disruption of the zona pellucida of the oocyte or embryo (PGS) technology, has emerged and developed in the past occurs, which can be performed mechanically, chemically few years, benefiting couples as it allows the selection and or using laser (Brezina et al., 2012). The key point of PGD/ transfer of healthy embryos during IVF treatments. These PGS is to have access to the genetic material to be evalu- techniques can be performed in oocytes (polar-body biop- ated, without compromising the material analyzed and the sy) or embryos (blastomere or trophectoderm biopsy). In quality of the oocyte/embryo (Xu & Montag, 2012). this case report, we describe the first two live births to be Polar body (PB) biopsy was introduced in 1990 (Ver- published in Brazil after a polar-body (PB) biopsy. In case linsky et al., 1990), and it is associated with a less inva- 1, a 42-year-old was submitted to PB biopsy with PGS due sive technique, presenting advantages, because it main- to advanced maternal age and poor ovarian reserve. -
Proctor Booklet
3.11 C: Meiosis Quiz PROCTOR VERSION 1. Which diagram best illustrates the processes of DNA replication, meiosis, and separation of sister chromatids? (A) Distractor Rationale: This answer suggests the student may understand that meiosis involves the splitting of homologous chromosomes, but does not understand that the first step in this process is the replication of all chromosomes to create a pair of two chromatids attached by a centromere (the X-shaped structures), and that the last step is the separation of sister chromatids in meiosis II to create four daughter cells, each containing a long chromosome and a short chromosome. (B) Distractor Rationale: This answer suggests the student may understand that meiosis involves the replication of all chromosomes and the pairing up and separation of homologous chromosomes, but does not understand that the final step in this process is the separation of sister chromatids in meiosis II to produce four haploid daughter cells, each with the haploid number of chromosomes. (C) Page 1 of 8 3.11 C: Meiosis Quiz PROCTOR VERSION Distractor Rationale: This answer suggests the student may understand that meiosis involves the replication of all chromosomes and the separation of sister chromatids, but does not realize that the first division involves the pairing up and separation of homologous chromosomes, and that this is then followed by a second division that produces four daughter cells, each with the haploid number of chromosomes. (D) Rationale: This answer suggests the student understands that the representation accurately depicts how the process of meiosis produces four haploid cells from one diploid parent cell: the formation of chromosomes, formation of the spindle complex, pairing of homologs, lining up of homologs on the equator, migration of chromosomes, and two divisions.