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相关概念视频

Non-LTR Retrotransposons03:18

Non-LTR Retrotransposons

As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
Alternative RNA Splicing02:18

Alternative RNA Splicing

Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Comparing Copy Number Variations and SNPs02:26

Comparing Copy Number Variations and SNPs

Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within the...
Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin studies.
Psychological and Sociocultural Causes of Schizophrenia01:29

Psychological and Sociocultural Causes of Schizophrenia

Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...

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相关实验视频

Updated: May 10, 2026

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia
05:51

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia

Published on: June 15, 2011

与精神分裂症相关的大型复发性微切除.

Hreinn Stefansson1, Dan Rujescu, Sven Cichon

  • 1CNS Division, deCODE genetics, Sturlugata 8, IS-101 Reykjavík, Iceland.

Nature
|August 1, 2008
PubMed
概括

罕见的副本数变异 (CNVs) 与精神分裂症风险有关. 这项研究确定了与精神分裂症相关的三个特定缺失,突出显示了罕见遗传变异在严重精神障碍中的作用.

更多相关视频

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
09:16

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants

Published on: February 21, 2015

A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
08:22

A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations

Published on: December 1, 2017

相关实验视频

Last Updated: May 10, 2026

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia
05:51

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia

Published on: June 15, 2011

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
09:16

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants

Published on: February 21, 2015

A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
08:22

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科学领域:

  • 遗传学 是一个遗传学.
  • 精神病学是一个精神病学.
  • 基因组医学是基因组医学.

背景情况:

  • 在严重精神疾病中降低生育率对风险等位基因施加负面选择压力.
  • 这可能解释了缺乏常见的变体,导致自闭症,精神分裂症和精神障碍的风险.
  • 罕见的变异可能比以前认为的对整体遗传风险的贡献更大.

研究的目的:

  • 使用全基因组方法识别与精神分裂症相关的副本数变异 (CNVs).
  • 为了研究新兴CNVs在精神分裂症遗传病因学中的作用.
  • 验证已识别的CNV与精神分裂症和相关精神病的关联.

主要方法:

  • 对9,878个父子传染的全基因组分析,以确定新的CNVs.
  • 在1,433例精神分裂症病例和33,250例对照中对66个de novo CNV进行关联测试 (第一阶段).
  • 在第二个由3,285个病例和7,951个对照样本 (第二阶段) 组成的第二个样本中对显著删除的复制分析.

主要成果:

  • 在1q21.1,15q11.2和15q13.3的三个删除显示了与I期精神分裂症的标称关联.
  • 在组合样本中,这三个删除都与精神分裂症和相关的精神病有显著的关联.
  • 这些已识别的CNV是罕见的,反复的,并且受到负选择的影响.

结论:

  • 罕见的,在1q21.1,15q11.2和15q13.3的复发性CNV是精神分裂症的重要危险因素.
  • CNV分析是识别精神分裂症遗传风险变异的一个有价值的工具.
  • 这项研究可能有助于发现精神分裂症相关基因和途径中的其他流行风险变异.