cAMP responsive element modulator is a protein that in humans is encoded by the CREM gene,[5][6][7] and it belongs to the cAMP-responsive element binding protein family. It has multiple isoforms, which act either as repressors or activators.[8] CREB family is important for in regulating transcription in response to various stresses, metabolic and developmental signals.[9] CREM transcription factors also play an important role in many physiological systems, such as cardiac function,[10] circadian rhythms,[11] locomotion and spermatogenesis.[12]
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This gene encodes a bZIP transcription factor that binds to the cAMP responsive element found in many viral and cellular promoters. It is an important component of cAMP-mediated signal transduction during the spermatogenetic cycle, as well as other complex processes. Alternative promoter and translation initiation site usage allows this gene to exert spatial and temporal specificity to cAMP responsiveness. Multiple alternatively spliced transcript variants encoding several different isoforms have been found for this gene, with some of them functioning as activators and some as repressors of transcription.[7]
The chromosomal location of CREM gene is at 10p11.21, where it starts at 35415769 and ends at 35501886 bp from pter ( according to hg19-Feb_2009)[13]
CAMP responsive element modulator has been shown to interact with FHL5.[14][15]
Panic disorder
One study reported the DNA sequence variations in the gene for CREM in panic disorder patients. It showed a significant excess of the shorter eight-repeat allele and of genotypes containing the eight-repeat allele in panic disorder patients.[16] The observed associations were limited to panic disorder without agoraphobia, and they were more prominent in females. But, the independent Italian and Spanish samples in this study did not support their results. Another family-based study showed little evidence of any susceptibility locus for panic disorder either within the CREM gene or in a nearby region on chromosome 10p11[17]
Spermiogenesis deficiency
CREM has been shown to be a master-switch regulator in testis.[18] It plays an important role in the regulation of the expression of post-meiotic genes, and this has been supported by several studies using CREM-mutation mice.[19] The results showed the first step in the process of sperm formation would be blocked if the germ cell development in mice CREM gene were disrupted. The cAMP response element sites can be found in the promoter region of some postmeiotic genes, so that the CREM can target and regulate these genes.[18]
Two studies proved that treat the rats with Salvia hypoleuca and Alpina galanga can significantly increased the CREM gene expression.[20][21]
Systemic lupus erythematousus
Less IL-2 will be produced from T cells in humans or mice with systemic lupus erythematousus (SLE). Some studies showed that an increased level CREM was presented in the nucleus of T lymphocytes from SLE patients. The CREM bound to the -180 site of the IL-2 promoter to repress its transcription.[22]
Masquilier D, Foulkes NS, Mattei MG, Sassone-Corsi P (November 1993). "Human CREM gene: evolutionary conservation, chromosomal localization, and inducibility of the transcript". Cell Growth & Differentiation. 4 (11): 931–937. PMID 7916662.
Sassone-Corsi P (August 1998). "CREM: a master-switch governing male germ cells differentiation and apoptosis". Seminars in Cell & Developmental Biology. 9 (4): 475–482. doi:10.1006/scdb.1998.0200. PMID 9813195.
Domschke K, Kuhlenbäumer G, Schirmacher A, Lorenzi C, Armengol L, DiBella D, et al. (February 2003). "Human nuclear transcription factor gene CREM: genomic organization, mutation screening, and association analysis in panic disorder". American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics. 117B (1): 70–78. doi:10.1002/ajmg.b.10018. PMID 12555239. S2CID 8884044.
Hamilton SP, Slager SL, Mayo D, Heiman GA, Klein DF, Hodge SE, et al. (April 2004). "Investigation of polymorphisms in the CREM gene in panic disorder". American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics. 126B (1): 111–115. doi:10.1002/ajmg.b.20121. PMID 15048659. S2CID 43810849.
Jasem E, Nasim J, Gholamreza M, Naser S, Nader M, Maryam SL, et al. (October 2010). "Evaluation of the effects of Salvia hypoleuca on the cAMP-responsive element modulator (CREM) gene expression and spermatogenesis in rat". Middle East Fertility Society Journal. 15 (4): 274–277. doi:10.1016/j.mefs.2010.08.002.
- Don J, Stelzer G (February 2002). "The expanding family of CREB/CREM transcription factors that are involved with spermatogenesis". Molecular and Cellular Endocrinology. 187 (1–2): 115–124. doi:10.1016/S0303-7207(01)00696-7. PMID 11988318. S2CID 23023082.
- Yan C, Miller CL, Abe J (March 2007). "Regulation of phosphodiesterase 3 and inducible cAMP early repressor in the heart". Circulation Research. 100 (4): 489–501. doi:10.1161/01.RES.0000258451.44949.d7. PMC 4115784. PMID 17332439.
- Pongubala JM, Atchison ML (April 1995). "Activating transcription factor 1 and cyclic AMP response element modulator can modulate the activity of the immunoglobulin kappa 3' enhancer". The Journal of Biological Chemistry. 270 (17): 10304–10313. doi:10.1074/jbc.270.17.10304. PMID 7730336.
- Walker WH, Sanborn BM, Habener JF (December 1994). "An isoform of transcription factor CREM expressed during spermatogenesis lacks the phosphorylation domain and represses cAMP-induced transcription". Proceedings of the National Academy of Sciences of the United States of America. 91 (26): 12423–12427. Bibcode:1994PNAS...9112423W. doi:10.1073/pnas.91.26.12423. PMC 45450. PMID 7809053.
- Fujimoto T, Fujisawa J, Yoshida M (February 1994). "Novel isoforms of human cyclic AMP-responsive element modulator (hCREM) mRNA". Journal of Biochemistry. 115 (2): 298–303. doi:10.1093/oxfordjournals.jbchem.a124332. PMID 8206879.
- de Groot RP, den Hertog J, Vandenheede JR, Goris J, Sassone-Corsi P (October 1993). "Multiple and cooperative phosphorylation events regulate the CREM activator function". The EMBO Journal. 12 (10): 3903–3911. doi:10.1002/j.1460-2075.1993.tb06068.x. PMC 413673. PMID 8404858.
- Bodor J, Walker W, Flemington E, Spetz AL, Habener JF (December 1995). "Modulation of Tax and PKA-mediated expression of HTLV-I promoter via cAMP response element binding and modulator proteins CREB and CREM". FEBS Letters. 377 (3): 413–418. Bibcode:1995FEBSL.377..413B. doi:10.1016/0014-5793(95)01299-0. PMID 8549766. S2CID 45422227.
- Nantel F, Monaco L, Foulkes NS, Masquilier D, LeMeur M, Henriksén K, et al. (March 1996). "Spermiogenesis deficiency and germ-cell apoptosis in CREM-mutant mice". Nature. 380 (6570): 159–162. Bibcode:1996Natur.380..159N. doi:10.1038/380159a0. PMID 8600390. S2CID 4278745.
- Blendy JA, Kaestner KH, Weinbauer GF, Nieschlag E, Schütz G (March 1996). "Severe impairment of spermatogenesis in mice lacking the CREM gene". Nature. 380 (6570): 162–165. Bibcode:1996Natur.380..162B. doi:10.1038/380162a0. PMID 8600391. S2CID 4337719.
- Bodor J, Spetz AL, Strominger JL, Habener JF (April 1996). "cAMP inducibility of transcriptional repressor ICER in developing and mature human T lymphocytes". Proceedings of the National Academy of Sciences of the United States of America. 93 (8): 3536–3541. Bibcode:1996PNAS...93.3536B. doi:10.1073/pnas.93.8.3536. PMC 39645. PMID 8622971.
- Gellersen B, Kempf R, Telgmann R (January 1997). "Human endometrial stromal cells express novel isoforms of the transcriptional modulator CREM and up-regulate ICER in the course of decidualization". Molecular Endocrinology. 11 (1): 97–113. doi:10.1210/mend.11.1.9875. PMID 8994192.
- Laurance ME, Kwok RP, Huang MS, Richards JP, Lundblad JR, Goodman RH (January 1997). "Differential activation of viral and cellular promoters by human T-cell lymphotropic virus-1 tax and cAMP-responsive element modulator isoforms". The Journal of Biological Chemistry. 272 (5): 2646–2651. doi:10.1074/jbc.272.5.2646. PMID 9006899.
- Bonny C, Cooker LA, Goldberg E (March 1998). "Deoxyribonucleic acid-protein interactions and expression of the human testis-specific lactate dehydrogenase promoter: transcription factor Sp1 plays a major role". Biology of Reproduction. 58 (3): 754–759. doi:10.1095/biolreprod58.3.754. PMID 9510963.
- Müller FU, Bokník P, Knapp J, Neumann J, Vahlensieck U, Oetjen E, et al. (September 1998). "Identification and expression of a novel isoform of cAMP response element modulator in the human heart". FASEB Journal. 12 (12): 1191–1199. doi:10.1096/fasebj.12.12.1191. PMID 9737722. S2CID 34554530.
- Fimia GM, De Cesare D, Sassone-Corsi P (March 1999). "CBP-independent activation of CREM and CREB by the LIM-only protein ACT". Nature. 398 (6723): 165–169. Bibcode:1999Natur.398..165F. doi:10.1038/18237. PMID 10086359. S2CID 4424908.
- Pati D, Meistrich ML, Plon SE (July 1999). "Human Cdc34 and Rad6B ubiquitin-conjugating enzymes target repressors of cyclic AMP-induced transcription for proteolysis". Molecular and Cellular Biology. 19 (7): 5001–5013. doi:10.1128/mcb.19.7.5001. PMC 84326. PMID 10373550.
- Inada A, Someya Y, Yamada Y, Ihara Y, Kubota A, Ban N, et al. (July 1999). "The cyclic AMP response element modulator family regulates the insulin gene transcription by interacting with transcription factor IID". The Journal of Biological Chemistry. 274 (30): 21095–21103. doi:10.1074/jbc.274.30.21095. PMID 10409662.
- Zauli G, Secchiero P, Rodella L, Gibellini D, Mirandola P, Mazzoni M, et al. (February 2000). "HIV-1 Tat-mediated inhibition of the tyrosine hydroxylase gene expression in dopaminergic neuronal cells". The Journal of Biological Chemistry. 275 (6): 4159–4165. doi:10.1074/jbc.275.6.4159. PMID 10660577.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.