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Related Concept Videos

Spermatogenesis01:41

Spermatogenesis

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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
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Zygotic Development And Stem Cell Formation01:10

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The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
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Development of the Sexual Organs in the Embryo and Fetus01:15

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Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
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Cancers Originate from Somatic Mutations in a Single Cell02:21

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Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
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Nondisjunction01:21

Nondisjunction

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Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers.  Nondisjunction is common during anaphase I or anaphase II of meiosis.  Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
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Human germ cell tumours from a developmental perspective.

J Wolter Oosterhuis1, Leendert H J Looijenga2,3

  • 1Laboratory for Experimental Patho-Oncology, Department of Pathology, Erasmus MC Cancer Institute, Rotterdam, Netherlands. j.w.oosterhuis@erasmusmc.nl.

Nature Reviews. Cancer
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Summary
This summary is machine-generated.

Human germ cell tumours (GCTs) originate from embryonic stem cells and are unique neoplasms. GCTs arise from failed control of developmental potential, not somatic mutations, offering new therapeutic targets.

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Area of Science:

  • Developmental Biology
  • Oncology
  • Genetics

Background:

  • Human germ cell tumours (GCTs) originate from early embryonic and germline stem cells.
  • These neoplasms occur in gonadal and extragonadal sites, reflecting primordial germ cell migration.
  • GCTs are unique as their development is determined by reprogrammed stem cell potency.

Purpose of the Study:

  • To elucidate the developmental pathogenetic model of GCTs.
  • To identify distinct epidemiological and genomic features of different GCT types.
  • To explore novel biomarkers and therapeutic targets for resistant GCTs.

Main Methods:

  • Classification of seven GCT types based on developmental potential.
  • Analysis of epidemiological and (epi)genomic features.
  • Investigation of genetic predisposition and cellular reprogramming mechanisms.

Main Results:

  • GCTs arise from failed control of stem cell developmental potential, involving reprogramming.
  • Unlike most cancers, GCTs rarely result from somatic driver mutations and show wild-type TP53.
  • Tumour progression and resistance are linked to embryonic epigenetic states, chromosomal imbalances, and somatic mutations.

Conclusions:

  • A comprehensive developmental model explains GCT origin.
  • GCTs represent a unique class of neoplasms driven by developmental processes rather than mutations.
  • Understanding GCT biology offers new avenues for diagnosis and treatment of resistant disease.