Chemerin

Protein-coding gene in the species Homo sapiens
RARRES2
Identifiers
AliasesRARRES2, HP10433, TIG2, Chemerin, retinoic acid receptor responder 2
External IDsOMIM: 601973 MGI: 1918910 HomoloGene: 2167 GeneCards: RARRES2
Gene location (Human)
Chromosome 7 (human)
Chr.Chromosome 7 (human)[1]
Chromosome 7 (human)
Genomic location for RARRES2
Genomic location for RARRES2
Band7q36.1Start150,338,317 bp[1]
End150,341,662 bp[1]
Gene location (Mouse)
Chromosome 6 (mouse)
Chr.Chromosome 6 (mouse)[2]
Chromosome 6 (mouse)
Genomic location for RARRES2
Genomic location for RARRES2
Band6|6 B2.3Start48,546,630 bp[2]
End48,549,723 bp[2]
RNA expression pattern
Bgee
HumanMouse (ortholog)
Top expressed in
  • right lobe of liver

  • canal of the cervix

  • left uterine tube

  • body of pancreas

  • tibial nerve

  • upper lobe of left lung

  • abdominal fat

  • right lung

  • gastric mucosa

  • germinal epithelium
Top expressed in
  • left lobe of liver

  • ascending aorta

  • white adipose tissue

  • aortic valve

  • uterus

  • gallbladder

  • right lung lobe

  • belly cord

  • cervix

  • carotid body
More reference expression data
BioGPS
More reference expression data
Gene ontology
Molecular function
  • protein binding
  • signaling receptor binding
Cellular component
  • extracellular matrix
  • platelet dense granule lumen
  • extracellular region
  • extracellular space
  • collagen-containing extracellular matrix
Biological process
  • in utero embryonic development
  • embryonic digestive tract development
  • positive regulation of macrophage chemotaxis
  • chemotaxis
  • retinoid metabolic process
  • cell differentiation
  • inflammatory response
  • regulation of lipid catabolic process
  • platelet degranulation
  • positive regulation of protein phosphorylation
  • positive regulation of fat cell differentiation
  • positive regulation of chemotaxis
  • innate immune response
  • insulin receptor signaling pathway
Sources:Amigo / QuickGO
Orthologs
SpeciesHumanMouse
Entrez

5919

71660

Ensembl

ENSG00000106538

ENSMUSG00000009281

UniProt

Q99969

Q9DD06

RefSeq (mRNA)

NM_002889

NM_027852
NM_001347167
NM_001347168

RefSeq (protein)

NP_002880
NP_002880.1

NP_001334096
NP_001334097
NP_082128

Location (UCSC)Chr 7: 150.34 – 150.34 MbChr 6: 48.55 – 48.55 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Chemerin, also known as retinoic acid receptor responder protein 2 (RARRES2), tazarotene-induced gene 2 protein (TIG2), or RAR-responsive protein TIG2 is a protein that in humans is encoded by the RARRES2 gene.[5][6][7]

Function

Retinoids exert biologic effects such as potent growth inhibitory and cell differentiation activities and are used in the treatment of hyperproliferative dermatological diseases. These effects are mediated by specific nuclear receptor proteins that are members of the steroid and thyroid hormone receptor superfamily of transcriptional regulators. RARRES1, RARRES2 (this gene), and RARRES3 are genes whose expression is upregulated by the synthetic retinoid tazarotene. RARRES2 is thought to act as a cell surface receptor.[7]

Chemerin is a chemoattractant protein that acts as a ligand for the G protein-coupled receptor CMKLR1 (also known as ChemR23). Chemerin is a 14 kDa protein secreted in an inactive form as prochemerin and is activated through cleavage of the C-terminus by inflammatory and coagulation serine proteases.[8][9]

Chemerin was found to stimulate chemotaxis of dendritic cells and macrophages to the site of inflammation.[10]

In humans, chemerin mRNA is highly expressed in white adipose tissue, liver and lung while its receptor, CMKLR1 is predominantly expressed in immune cells as well as adipose tissue.[11] Because of its role in adipocyte differentiation and glucose uptake, chemerin is classified as an adipokine.

Role as an adipokine

Chemerin has been implicated in autocrine / paracrine signaling for adipocyte differentiation and also stimulation of lipolysis.[11][12] Studies with 3T3-L1 cells have shown chemerin expression is low in pre-differentiated adipocytes[11] but its expression and secretion increases both during and after differentiation in vitro. Genetic knockdown of chemerin or its receptor, CMKLR1 impairs differentiation into adipocytes, and reduces the expression of GLUT4 and adiponectin, while increasing expression of IL-6 and insulin receptor. Furthermore, post-differentiation knockdown of chemerin reduced GLUT4, leptin, adiponectin, perilipin, and reduced lipolysis, suggesting chemerin plays a role in metabolic function of mature adipocytes.[12] Studies using mature human adipocytes, 3T3-L1 cells, and in vivo studies in mice showed chemerin stimulates the phosphorylation of the MAPKs, ERK1, and ERK2, which are involved in mediating lipolysis.[12]

Studies in mice have shown neither chemerin nor CMKLR1 are highly expressed in brown adipose tissue, indicating that chemerin plays a role in energy storage rather than thermogenesis.2

Role in obesity and diabetes

Given chemerin's role as a chemoattractant and a recent finding macrophages have been implicated in chronic inflammation of adipose tissue in obesity.[13] This suggests chemerin may play an important role in the pathogenesis of obesity and insulin resistance.

Studies in mice found that feeding mice a high-fat diet, resulted in increased expression of both chemerin and CMKLR1.[6] In humans, chemerin levels are significantly different between individuals with normal glucose tolerance and individuals with type II diabetes and first degree relatives.[14] Moreover, chemerin levels show a significant correlation with body mass index, plasma triglyceride levels and blood pressure.[8]

It was found incubation of 3T3-L1 cells with recombinant human chemerin protein facilitated insulin-stimulated glucose uptake.[15] This suggests chemerin plays a role in insulin sensitivity and may be a potential therapeutic target for treating type II diabetes.[8]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000106538 – Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000009281 – Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ Duvic M, Nagpal S, Asano AT, Chandraratna RA (Sep 1997). "Molecular mechanisms of tazarotene action in psoriasis". J. Am. Acad. Dermatol. 37 (2 Pt 3): S18–24. doi:10.1016/s0190-9622(97)80396-9. PMID 9270552.
  6. ^ a b Roh SG, Song SH, Choi KC, Katoh K, Wittamer V, Parmentier M, Sasaki S (Sep 2007). "Chemerin--a new adipokine that modulates adipogenesis via its own receptor". Biochem. Biophys. Res. Commun. 362 (4): 1013–8. doi:10.1016/j.bbrc.2007.08.104. hdl:10091/618. PMID 17767914.
  7. ^ a b "Entrez Gene: RARRES2 retinoic acid receptor responder (tazarotene induced) 2".
  8. ^ a b c Zabel BA, Allen SJ, Kulig P, Allen JA, Cichy J, Handel TM, Butcher EC (October 2005). "Chemerin activation by serine proteases of the coagulation, fibrinolytic, and inflammatory cascades". J. Biol. Chem. 280 (41): 34661–6. doi:10.1074/jbc.M504868200. PMID 16096270.
  9. ^ Schultz S, Saalbach A, Heiker JT, Meier R, Zellmann T, Simon JC, Beck-Sickinger AG (2013). "Proteolytic activation of prochemerin by kallikrein 7 breaks an ionic linkage and results in C-terminal rearrangement". Biochem. J. 452 (2): 271–80. doi:10.1042/BJ20121880. PMID 23495698.
  10. ^ Wittamer V, Franssen JD, Vulcano M, Mirjolet JF, Le Poul E, Migeotte I, Brézillon S, Tyldesley R, Blanpain C, Detheux M, Mantovani A, Sozzani S, Vassart G, Parmentier M, Communi D (October 2003). "Specific recruitment of antigen-presenting cells by chemerin, a novel processed ligand from human inflammatory fluids". J. Exp. Med. 198 (7): 977–85. doi:10.1084/jem.20030382. PMC 2194212. PMID 14530373.
  11. ^ a b c Bozaoglu K, Bolton K, McMillan J, Zimmet P, Jowett J, Collier G, Walder K, Segal D (October 2007). "Chemerin is a novel adipokine associated with obesity and metabolic syndrome". Endocrinology. 148 (10): 4687–94. doi:10.1210/en.2007-0175. PMID 17640997.
  12. ^ a b c Goralski KB, McCarthy TC, Hanniman EA, Zabel BA, Butcher EC, Parlee SD, Muruganandan S, Sinal CJ (September 2007). "Chemerin, a novel adipokine that regulates adipogenesis and adipocyte metabolism". J. Biol. Chem. 282 (38): 28175–88. doi:10.1074/jbc.M700793200. PMID 17635925.
  13. ^ Xu H, Barnes GT, Yang Q, Tan G, Yang D, Chou CJ, Sole J, Nichols A, Ross JS, Tartaglia LA, Chen H (December 2003). "Chronic inflammation in fat plays a crucial role in the development of obesity-related insulin resistance". J. Clin. Invest. 112 (12): 1821–30. doi:10.1172/JCI19451. PMC 296998. PMID 14679177.
  14. ^ Coimbra S, Brandão Proença J, Santos-Silva A, Neuparth MJ (2014). "Adiponectin, leptin, and chemerin in elderly patients with type 2 diabetes mellitus: a close linkage with obesity and length of the disease". Biomed Res Int. 2014: 1–8. doi:10.1155/2014/701915. PMC 4101968. PMID 25105135.
  15. ^ Takahashi M, Takahashi Y, Takahashi K, Zolotaryov FN, Hong KS, Kitazawa R, Iida K, Okimura Y, Kaji H, Kitazawa S, Kasuga M, Chihara K (March 2008). "Chemerin enhances insulin signaling and potentiates insulin-stimulated glucose uptake in 3T3-L1 adipocytes". FEBS Lett. 582 (5): 573–8. doi:10.1016/j.febslet.2008.01.023. hdl:20.500.14094/D2003055. PMID 18242188. S2CID 41312338.

Further reading

  • Nagpal S, Patel S, Jacobe H, DiSepio D, Ghosn C, Malhotra M, Teng M, Duvic M, Chandraratna RA (1997). "Tazarotene-induced gene 2 (TIG2), a novel retinoid-responsive gene in skin". J. Invest. Dermatol. 109 (1): 91–5. doi:10.1111/1523-1747.ep12276660. PMID 9204961.
  • Yokoyama-Kobayashi M, Yamaguchi T, Sekine S, Kato S (1999). "Selection of cDNAs encoding putative type II membrane proteins on the cell surface from a human full-length cDNA bank". Gene. 228 (1–2): 161–7. doi:10.1016/S0378-1119(99)00004-9. PMID 10072769.
  • Vermi W, Riboldi E, Wittamer V, Gentili F, Luini W, Marrelli S, Vecchi A, Franssen JD, Communi D, Massardi L, Sironi M, Mantovani A, Parmentier M, Facchetti F, Sozzani S (2005). "Role of ChemR23 in directing the migration of myeloid and plasmacytoid dendritic cells to lymphoid organs and inflamed skin". J. Exp. Med. 201 (4): 509–15. doi:10.1084/jem.20041310. PMC 2213064. PMID 15728234.
  • Wittamer V, Bondue B, Guillabert A, Vassart G, Parmentier M, Communi D (2005). "Neutrophil-mediated maturation of chemerin: a link between innate and adaptive immunity". J. Immunol. 175 (1): 487–93. doi:10.4049/jimmunol.175.1.487. PMID 15972683.
  • v
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CC
CCR1
CCR2
CCR3
CCR4
CCR5
CCR6
CCR7
CCR8
CCR9
CCR10
CCR11
Ungrouped
CXC
CXCR1
(IL-8Rα)
  • Antagonists: Navarixin
  • NAMs: Ladarixin
  • Reparixin (repertaxin)
CXCR2
(IL-8Rβ)
  • Antagonists: Danirixin
  • Elubrixin
  • Navarixin
  • NAMs: Ladarixin
  • Reparixin (repertaxin)
CXCR3
CXCR4
CXCR5
CXCR6
CXCR7
C (XC)
XCR1
CX3C
CX3CR1
Others
CCBP2
CMKLR1
  • Agonists: Chemerin
  • Resolvin E1