Studies of oogenesis occupy an important place in current in vestigations in developmental biology. Today no one has any doubt whatsoever that oogenesis is not just the prelude to development, but is development itself, and a very essential part of it. These words of an eminent Soviet scientist, B. L. As taurov , taken by T. B. Aizenshtadt as an epigraph to her chapter in this book, make a good epigraph for the entire book. It is now clear that during oogenesis not only vast reserves of ribosomes and mitochondria, of yolk, carbohydrates, and lipids, and of enzymes for protein and nucleic acid…mehr
Studies of oogenesis occupy an important place in current in vestigations in developmental biology. Today no one has any doubt whatsoever that oogenesis is not just the prelude to development, but is development itself, and a very essential part of it. These words of an eminent Soviet scientist, B. L. As taurov , taken by T. B. Aizenshtadt as an epigraph to her chapter in this book, make a good epigraph for the entire book. It is now clear that during oogenesis not only vast reserves of ribosomes and mitochondria, of yolk, carbohydrates, and lipids, and of enzymes for protein and nucleic acid synthesis and for carbohydrate and fat metabolism (which ensures the energy supply and metabolism of the oocyte and the developing embryo) are formed, but also long-lived mRNA and proteins are synthesized, which determine both the completion of oocyte maturation and the initial stages of embryonic development. In the last 15-20 years, the use of molecular biology methods, electron microscopy, autoradiography, and microsurgical methods of experimental embryology in studying the pre-embryonic development of animals has greatly increased our knowledge of oogenesis. This has led to the need to systematize the data obtained, to reinter pret old ideas, and to review the results obtained by new research trends which have emerged in the last few years and which are of general biological interest. Such a task was undertaken in the book Sovremennye Problemy Oogeneza (Current Problems of Oogenesis), published in 1977 (in Russian).
1 Oocyte Growth and Vitellogenesis.- 1.1. Sources of Ribosomal RNA in Different Types of Oogenesis.- 1.2. Vitellogenesis.- 1.3. Phagocytic Activity of the Oocytes during Diffuse Oogenesis.- 1.4. Concluding Remarks.- References.- 2 The Nucleus during Oogenesis with Special Reference to Extrachromosomal Structures.- 2.1. Oogonia and Their Differentiation into Oocytes and Trophocytes (Nurse Cells).- 2.2. Oocytes and Trophocytes (Nurse Cells).- 2.3. The Synaptonemal Complex.- 2.4. Extrachromosomal Nuclear DNA of Oocytes.- 2.5. Oocyte Nucleoli.- 2.6. Nucleolus-Like and Nuclear Bodies.- 2.7. The Karyosphere.- 2.8. The Nuclear Envelope.- 2.9. Nucleocytoplasmic Interactions.- 2.10. Conclusions.- References.- 3 Development of the Mature Egg Organization in Amphibians, Fish, and Starfish during the Concluding Stages of Oogenesis, in the Period of Maturation.- 3.1.Effect of Gonadotropic Hormones on Oocyte Maturation.- 3.2. Changes in the Structure and Properties of Amphibian and Sturgeon Fish Oocytes during Maturation.- 3.3. Changes in Oocyte Structure and Properties during Maturation Period in Teleosts.- 3.4. The Role of the Oocyte Nucleus and Cytoplasm in the Development of the Mature Egg Organization during the Maturation Period.- 3.5. Molecular Bias of Oocyte Changes during the Maturation Period.- 3.6. Concluding Remarks.- References.- 4 Meiotic Divisions.- 4.1. Meiosis and Fertilization.- 4.2. Morphology of Meiosis.- 4.3. Chronology of Meiosis.- 4.4. Reduction and Equational Character of Meiotic Divisions.- 4.5. Meiosis in Parthenogenetic Development.- 4.6. Genetic Mechanisms of Sex Determination.- 4.7. Effect of External Factors on Meiosis.- 4.8. Control of Meiosis.- 4.9. Concluding Remarks.- References.- 5 Maturation of Mammalian Oocytes in Vitro.- 5.1. Acquisition of Maturation Competence.- 5.2. Morphology of Maturation.- 5.3. Duration of Maturation.- 5.4. Biochemistry of Maturation.- 5.5. Hormonal Control of Maturation.- References.- 6 Special Features of Controlling Respiration during Oogenesis.- 6.1. Oxygen Consumption.- 6.2. Intensity of Oocyte Respiration.- 6.3. Control of Oxygen Consumption.- 6.4. Control of Respiration Intensity in Oocytes.- References.- 7 Control of Carbohydrate Metabolism at Different Stages of Oogenesis.- 7.1. The Enzyme System of Carbohydrate Metabolism in the Oocytes of the Loach.- 7.2. Glycolysis and Gluconeogenesis in Oocytes.- 7.3. Gluconeogenesis and Glycogenesis in Oocytes.- 7.4. Special Features of Glycogen Synthetase in Loach Oocytes.- 7.5. Oocyte Maturation and Changes in Carbohydrate Metabolism.- 7.6. Satellite Enzymes of Gluconeogenesis during Oocyte Maturation.- 7.7. Oocyte Maturation and Control of Glycogenolysis in the Mature Oocyte and Embryo.- References.
1 Oocyte Growth and Vitellogenesis.- 1.1. Sources of Ribosomal RNA in Different Types of Oogenesis.- 1.2. Vitellogenesis.- 1.3. Phagocytic Activity of the Oocytes during Diffuse Oogenesis.- 1.4. Concluding Remarks.- References.- 2 The Nucleus during Oogenesis with Special Reference to Extrachromosomal Structures.- 2.1. Oogonia and Their Differentiation into Oocytes and Trophocytes (Nurse Cells).- 2.2. Oocytes and Trophocytes (Nurse Cells).- 2.3. The Synaptonemal Complex.- 2.4. Extrachromosomal Nuclear DNA of Oocytes.- 2.5. Oocyte Nucleoli.- 2.6. Nucleolus-Like and Nuclear Bodies.- 2.7. The Karyosphere.- 2.8. The Nuclear Envelope.- 2.9. Nucleocytoplasmic Interactions.- 2.10. Conclusions.- References.- 3 Development of the Mature Egg Organization in Amphibians, Fish, and Starfish during the Concluding Stages of Oogenesis, in the Period of Maturation.- 3.1.Effect of Gonadotropic Hormones on Oocyte Maturation.- 3.2. Changes in the Structure and Properties of Amphibian and Sturgeon Fish Oocytes during Maturation.- 3.3. Changes in Oocyte Structure and Properties during Maturation Period in Teleosts.- 3.4. The Role of the Oocyte Nucleus and Cytoplasm in the Development of the Mature Egg Organization during the Maturation Period.- 3.5. Molecular Bias of Oocyte Changes during the Maturation Period.- 3.6. Concluding Remarks.- References.- 4 Meiotic Divisions.- 4.1. Meiosis and Fertilization.- 4.2. Morphology of Meiosis.- 4.3. Chronology of Meiosis.- 4.4. Reduction and Equational Character of Meiotic Divisions.- 4.5. Meiosis in Parthenogenetic Development.- 4.6. Genetic Mechanisms of Sex Determination.- 4.7. Effect of External Factors on Meiosis.- 4.8. Control of Meiosis.- 4.9. Concluding Remarks.- References.- 5 Maturation of Mammalian Oocytes in Vitro.- 5.1. Acquisition of Maturation Competence.- 5.2. Morphology of Maturation.- 5.3. Duration of Maturation.- 5.4. Biochemistry of Maturation.- 5.5. Hormonal Control of Maturation.- References.- 6 Special Features of Controlling Respiration during Oogenesis.- 6.1. Oxygen Consumption.- 6.2. Intensity of Oocyte Respiration.- 6.3. Control of Oxygen Consumption.- 6.4. Control of Respiration Intensity in Oocytes.- References.- 7 Control of Carbohydrate Metabolism at Different Stages of Oogenesis.- 7.1. The Enzyme System of Carbohydrate Metabolism in the Oocytes of the Loach.- 7.2. Glycolysis and Gluconeogenesis in Oocytes.- 7.3. Gluconeogenesis and Glycogenesis in Oocytes.- 7.4. Special Features of Glycogen Synthetase in Loach Oocytes.- 7.5. Oocyte Maturation and Changes in Carbohydrate Metabolism.- 7.6. Satellite Enzymes of Gluconeogenesis during Oocyte Maturation.- 7.7. Oocyte Maturation and Control of Glycogenolysis in the Mature Oocyte and Embryo.- References.
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