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403337 occurrences (No.43 in the rank) during 5 years in the PubMed. [no cache] 500 found

282) In our model, we integrate negative regulations into gene activation process, and make the conventional assumption on the production and degradation of transcripts.

--- ABSTRACT ---

PMID:24057891 DOI:10.1093/imammb/dqt019

2015 Mathematical medicine and biology : a journal of the IMA

* Transcription dynamics of inducible genes modulated by negative regulations.

- Gene transcription is a stochastic process in single cells, in which genes transit randomly between active and inactive states. Transcription of many inducible genes is also tightly regulated: It is often stimulated by extracellular signals, activated through signal transduction pathways and later repressed by negative regulations. In this work, we study the nonlinear dynamics of the mean transcription level of inducible genes modulated by the interplay of the intrinsic transcriptional randomness and the repression by negative regulations. In our model, we integrate negative regulations into gene activation process, and make the conventional assumption on the production and degradation of transcripts. We show that, whether or not the basal transcription is temporarily terminated when cells are stimulated, the mean transcription level grows in the typical up and down pattern commonly observed in immune response genes. With the help of numerical simulations, we clarify the delicate impact of the system parameters on the transcription dynamics, and demonstrate how our model generates the distinct temporal gene-induction patterns in mouse fibroblasts discerned in recent experiments.

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(1)75 expression	(15)5 of	(29)3 block	(43)2 mutation
(2)34 order	(16)5 transfer	(30)3 can	(44)2 on
(3)32 arrangement	(17)5 were	(31)3 contents	(45)2 overlap
(4)31 and	(18)4 activation	(32)3 polymorphisms	(46)2 peptide
(5)21 null	(19)4 delivery	(33)3 sequencing	(47)2 profiling
(6)15 was	(20)4 encoding	(34)3 transcription	(48)2 regions
(7)12 expression,	(21)4 expressions	(35)2 analysis	(49)2 sequence
(8)9 arrangement,	(22)4 fragments	(36)2 carriers	(50)2 sequences,
(9)7 composition	(23)4 is	(37)2 cluster	(51)2 spookier
(10)7 organization	(24)4 silencing	(38)2 clusters	(52)2 synteny
(11)7 sequences	(25)4 to	(39)2 content	(53)2 therapy,
(12)5 flow	(26)4 which	(40)2 family	(54)2 used
(13)5 for	(27)3 alterations	(41)2 from	(55)2 uses
(14)5 in	(28)3 as	(42)2 has

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--- WordNet output for gene --- =>遺伝子 Overview of noun gene The noun gene has 1 sense (no senses from tagged texts) 1. gene, cistron, factor -- ((genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity; "genes were formerly called factors") --- WordNet end ---