scholarly journals Can random mutation explain phenotypic variability?

2018 ◽  
Author(s):  
Víctor Alejandro Zapata Trejo
Keyword(s):  
Gene Expression ◽  
Somatic Cell ◽  
Germ Line ◽  
Phenotypic Variability ◽  
Random Mutation ◽  
Differentiated Cells ◽  
Undifferentiated Cells ◽  
Joint Evolution

The epigenome regulates the gene expression of all differentiated cells and indicates which specific genes must be transcribed. It is argued that the expression factors that act on specific genes of the somatic cell involved in a behavior also act on the transcription of the same genes in the most undifferentiated cells of the germ line. It is proposed how a probabilistic view of the random mutation can explain the evolution of the phenotypes and integrate all the evidence pointing to a joint evolution with the environment.

scholarly journals Can random mutation explain the phenotypic variability?

2018 ◽  
Author(s):  
Víctor Alejandro Zapata Trejo
Keyword(s):  
Gene Expression ◽  
Somatic Cell ◽  
Germ Line ◽  
Phenotypic Variability ◽  
Random Mutation ◽  
Differentiated Cells ◽  
Undifferentiated Cells

The epigenome regulates the gene expression of all differentiated cells and indicates which specific genes must be transcribed. It is argued that the expression factors that act on specific genes of the somatic cell involved in a behavior also act on the transcription of the same genes in the most undifferentiated cells of the germ line. It is proposed how a probabilistic view of the random mutation can explain the evolution of the phenotypes and integrate all the evidence pointing to a conjunct evolution with the environment.

scholarly journals Hypothesis of the conjunct expression gene: can random mutation explain the phenotypic variability?

2018 ◽  
Author(s):  
Víctor A Zapata Trejo
Keyword(s):  
Gene Expression ◽  
Germ Line ◽  
Phenotypic Variability ◽  
Somatic Cells ◽  
Random Mutation ◽  
Differentiated Cells ◽  
Undifferentiated Cells

The epigenome regulates the gene expression of all differentiated cells and indicates which specific genes must be transcribed. It is argued that the expression factors that act in specific genes of the somatic cells involved in a behavior also act in the partial transcription of the same genes in the most undifferentiated cells of the germ line. It is proposed how a probabilistic view of the random mutation can explain the evolution of the phenotypes and integrate all the evidence pointing to a conjunct evolution with the environment.

scholarly journals Can random mutation explain the phenotypic variability?

2018 ◽  
Author(s):  
Víctor A Zapata Trejo
Keyword(s):  
Gene Expression ◽  
Germ Line ◽  
Phenotypic Variability ◽  
Somatic Cells ◽  
Random Mutation ◽  
Differentiated Cells ◽  
Undifferentiated Cells

The epigenome regulates the gene expression of all differentiated cells and indicates which specific genes must be transcribed. It is argued that the expression factors that act in specific genes of the somatic cells involved in a behavior also act in the partial transcription of the same genes in the most undifferentiated cells of the germ line. It is proposed how a probabilistic view of the random mutation can explain the evolution of the phenotypes and integrate all the evidence pointing to a conjunct evolution with the environment.

scholarly journals Hypothesis of the conjunct expression gene: can random mutation explain the phenotypic variability?

2018 ◽  
Author(s):  
Víctor A Zapata Trejo
Keyword(s):  
Gene Expression ◽  
Natural Selection ◽  
Functional Role ◽  
Germ Line ◽  
Phenotypic Variability ◽  
Point Of View ◽  
Random Mutation ◽  
Undifferentiated Cells ◽  
Gene Expression Levels

If the environmental conditions can or not influence in the phenotype evolution, is a topic that has been discussed during the last ten years. The epigenome regulates the gene expression of all cells and indicates which specific genes must be transcribed. It is argued that the expression factors that act in specific genes of the somatic cells involved in a behavior also act in the partial transcription of the same genes in the most undifferentiated cells of the germ line. The functional role of the isochores as an epigenetic determinant regulator of the transcription and therefore of gene expression levels is discussed. It is proposed how a probabilistic view of the random mutation can integrate all the evidence pointing to a conjunct phenotype evolution with the environment. This work provides a new point of view on how the environment can influence in adaptation through natural selection considering the theory currently accepted.

scholarly journals Hypothesis of the conjunct expression gene: can random mutation explain the phenotypic variability?

2018 ◽  
Author(s):  
Víctor A Zapata Trejo
Keyword(s):  
Gene Expression ◽  
Natural Selection ◽  
Functional Role ◽  
Germ Line ◽  
Phenotypic Variability ◽  
Point Of View ◽  
Random Mutation ◽  
Undifferentiated Cells ◽  
Gene Expression Levels

If the environmental conditions can or not influence in the phenotype evolution, is a topic that has been discussed during the last ten years. The epigenome regulates the gene expression of all cells and indicates which specific genes must be transcribed. It is argued that the expression factors that act in specific genes of the somatic cells involved in a behavior also act in the partial transcription of the same genes in the most undifferentiated cells of the germ line. The functional role of the isochores as an epigenetic determinant regulator of the transcription and therefore of gene expression levels is discussed. It is proposed how a probabilistic view of the random mutation can integrate all the evidence pointing to a conjunct phenotype evolution with the environment. This work provides a new point of view on how the environment can influence in adaptation through natural selection considering the theory currently accepted.

scholarly journals Hypothesis of the conjunct expression gene: can random mutation explain the phenotypic variability?

2018 ◽  
Author(s):  
Víctor A Zapata Trejo
Keyword(s):  
Gene Expression ◽  
Natural Selection ◽  
Functional Role ◽  
Germ Line ◽  
Phenotypic Variability ◽  
Point Of View ◽  
Random Mutation ◽  
Undifferentiated Cells ◽  
Gene Expression Levels

If the environmental conditions can or not influence in the phenotype evolution, is a topic that has been discussed during the last ten years. The epigenome regulates the gene expression of all cells and indicates which specific genes must be transcribed. It is argued that the expression factors that act in specific genes of the somatic cells involved in a behavior also act in the partial transcription of the same genes in the most undifferentiated cells of the germ line. The functional role of the isochores as an epigenetic determinant regulator of the transcription and therefore of gene expression levels is discussed. It is proposed how a probabilistic view of the random mutation can integrate all the evidence pointing to a conjunct phenotype evolution with the environment. This work provides a new point of view on how the environment can influence in adaptation through natural selection considering the theory currently accepted.

scholarly journals Nup93 and CTCF co-modulate spatiotemporal dynamics and function of the HOXA gene cluster during differentiation

2019 ◽  
Author(s):  
Ajay S. Labade ◽  
Adwait Salvi ◽  
Krishanpal Karmodiya ◽  
Kundan Sengupta
Keyword(s):  
Gene Expression ◽  
Gene Locus ◽  
Nuclear Periphery ◽  
Spatiotemporal Dynamics ◽  
Differentiated Cells ◽  
Undifferentiated Cells ◽  
Dynamics And Function ◽  
Hoxa Gene Expression ◽  
And Function ◽  
Hoxa Gene

ABSTRACTNucleoporins regulate nuclear transport. In addition, nucleoporins also modulate chromatin organization and gene expression. Here we investigated the role of nucleoporin Nup93, in regulating HOXA gene expression during differentiation. ChIP-Seq analysis revealed that Nup93 associates with genes involved in development and differentiation. Furthermore, Nup93 occupancy significantly overlaps with CTCF. Interestingly, Nup93 and CTCF show antagonistic roles in regulating 3’ and 5’ end HOXA genes in undifferentiated cells. The HOXA gene locus untethered from the nuclear periphery upon Nup93 but not CTCF depletion, consistent with its upregulation. Remarkably, occupancy of Nup93 and CTCF on HOXA gene locus progressively declined during differentiation but was restored in differentiated cells, consistent with the rerepression and re-localization of the HOXA gene locus with the nuclear periphery upon differentiation. In summary, Nup93 is a key modulator of the spatiotemporal dynamics and function of the HOXA gene locus during differentiation.

scholarly journals PC12 and THP-1 Cell Lines as Neuronal and Microglia Model in Neurobiological Research

2021 ◽  
Vol 11 (9) ◽  
pp. 3729
Author(s):  
Katarzyna Balon ◽  
Benita Wiatrak
Keyword(s):  
Cell Culture ◽  
Dna Damage ◽  
Cell Lines ◽  
Inflammatory Factor ◽  
Research Model ◽  
Differentiated Cells ◽  
Undifferentiated Cells ◽  
Primary Cell Lines ◽  
Neurobiological Research ◽  
The Impact

Models based on cell cultures have become a useful tool in modern scientific research. Since primary cell lines are difficult to obtain and handle, neoplasm-derived lines like PC12 and THP-1 offer a cheap and flexible solution for neurobiological studies but require prior differentiation to serve as a neuronal or microglia model. PC12 cells constitute a suitable research model only after differentiation by incubation with nerve growth factor (NGF) and THP-1 cells after administering a differentiation factor such as phorbol 12-myristate-13-acetate (PMA). Still, quite often, studies are performed on these cancer cells without differentiation. The study aimed to assess the impact of PC12 or THP-1 cell differentiation on sensitivity to harmful factors such as Aβ25-35 (0.001–5 µM) (considered as one of the major detrimental factors in the pathophysiology of Alzheimer’s disease) or lipopolysaccharide (1–100 µM) (LPS; a pro-inflammatory factor of bacterial origin). Results showed that in most of the tests performed, the response of PC12 and THP-1 cells induced to differentiation varied significantly from the effect in undifferentiated cells. In general, differentiated cells showed greater sensitivity to harmful factors in terms of metabolic activity and DNA damage, while in the case of the free radicals, the results were heterogeneous. Obtained data emphasize the importance of proper differentiation of cell lines of neoplastic origin in neurobiological research and standardization of cell culture handling protocols to ensure reliable results.

scholarly journals Relation of Gene Expression Phenotype to Immunoglobulin Mutation Genotype in B Cell Chronic Lymphocytic Leukemia

2001 ◽  
Vol 194 (11) ◽  
pp. 1639-1648 ◽  
Author(s):  
Andreas Rosenwald ◽  
Ash A. Alizadeh ◽  
George Widhopf ◽  
Richard Simon ◽  
R. Eric Davis ◽  
...  
Keyword(s):  
Gene Expression ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Germ Line ◽  
Gene Expression Signature ◽  
Lymphocytic Leukemia ◽  
Common Mechanism ◽  
Human Leukemia ◽  
Mutational Status ◽  
Cell Chronic Lymphocytic Leukemia

The most common human leukemia is B cell chronic lymphocytic leukemia (CLL), a malignancy of mature B cells with a characteristic clinical presentation but a variable clinical course. The rearranged immunoglobulin (Ig) genes of CLL cells may be either germ-line in sequence or somatically mutated. Lack of Ig mutations defined a distinctly worse prognostic group of CLL patients raising the possibility that CLL comprises two distinct diseases. Using genomic-scale gene expression profiling, we show that CLL is characterized by a common gene expression “signature,” irrespective of Ig mutational status, suggesting that CLL cases share a common mechanism of transformation and/or cell of origin. Nonetheless, the expression of hundreds of other genes correlated with the Ig mutational status, including many genes that are modulated in expression during mitogenic B cell receptor signaling. These genes were used to build a CLL subtype predictor that may help in the clinical classification of patients with this disease.

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