- 同
- OCM, CR3, Mac 1
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2016/03/28 21:12:32」(JST)
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Integrin, alpha M (complement component 3 receptor 3 subunit) |
PDB rendering based on 1bho.
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Available structures |
PDB |
Ortholog search: PDBe, RCSB |
List of PDB id codes |
1A8X, 1BHO, 1BHQ, 1IDN, 1IDO, 1JLM, 1M1U, 1MF7, 1N9Z, 1NA5, 2LKE, 2LKJ, 3Q3G, 3QA3, 4M76
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Identifiers |
Symbols |
ITGAM ; CD11B; CR3A; MAC-1; MAC1A; MO1A; SLEB6 |
External IDs |
OMIM: 120980 MGI: 96607 HomoloGene: 526 ChEMBL: 3826 GeneCards: ITGAM Gene |
Gene ontology |
Molecular function |
• opsonin binding
• glycoprotein binding
• protein binding
• heparin binding
• heparan sulfate proteoglycan binding
• metal ion binding
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Cellular component |
• extracellular space
• nucleus
• plasma membrane
• integrin complex
• external side of plasma membrane
• cell surface
• extracellular exosome
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Biological process |
• toll-like receptor signaling pathway
• leukocyte migration involved in inflammatory response
• cell adhesion
• integrin-mediated signaling pathway
• blood coagulation
• ectodermal cell differentiation
• microglia development
• extracellular matrix organization
• neutrophil chemotaxis
• toll-like receptor 4 signaling pathway
• innate immune response
• cellular extravasation
• activated T cell proliferation
• leukocyte migration
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Sources: Amigo / QuickGO |
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RNA expression pattern |
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More reference expression data |
Orthologs |
Species |
Human |
Mouse |
Entrez |
3684 |
16409 |
Ensembl |
ENSG00000169896 |
ENSMUSG00000030786 |
UniProt |
P11215 |
P05555 |
RefSeq (mRNA) |
NM_000632 |
NM_001082960 |
RefSeq (protein) |
NP_000623 |
NP_001076429 |
Location (UCSC) |
Chr 16:
31.26 – 31.33 Mb |
Chr 7:
128.06 – 128.13 Mb |
PubMed search |
[1] |
[2] |
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Integrin alpha M (ITGAM) is one protein subunit that forms the heterodimeric integrin alpha-M beta-2 (αMβ2) molecule, also known as macrophage-1 antigen (Mac-1) or complement receptor 3 (CR3).[1] ITGAM is also known as CR3A, and cluster of differentiation molecule 11B (CD11B). The second chain of αMβ2 is the common integrin β2 subunit known as CD18, and integrin αMβ2 thus belongs to the β2 subfamily (or leukocyte) integrins.[2]
αMβ2 is expressed on the surface of many leukocytes involved in the innate immune system, including monocytes, granulocytes, macrophages, and natural killer cells.[1] It mediates inflammation by regulating leukocyte adhesion and migration and has been implicated in several immune processes such as phagocytosis, cell-mediated cytotoxicity, chemotaxis and cellular activation.[1] It is involved in the complement system due to its capacity to bind inactivated complement component 3b (iC3b).[3] The ITGAM (alpha) subunit of integrin αMβ2 is directly involved in causing the adhesion and spreading of cells but cannot mediate cellular migration without the presence of the β2 (CD18) subunit.[1]
In genomewide association studies, single nucleotide polymorphisms in ITGAM had the strongest association with systemic lupus erythematosus, with an odds ratio of 1.65 for the T allele of rs9888739 and lupus.[4][5]
In histopathology, immunohistochemistry with antibodies against CD11B is frequently used to identify macrophages and microglia.
Contents
- 1 See also
- 2 References
- 3 Further reading
- 4 External links
See also
References
- ^ a b c d Solovjov D, Pluskota E, Plow E (2005). "Distinct roles for the alpha and beta subunits in the functions of integrin alphaMbeta2". J Biol Chem 280 (2): 1336–45. doi:10.1074/jbc.M406968200. PMID 15485828.
- ^ Larson R, Springer T (1990). "Structure and function of leukocyte integrins". Immunol Rev 114: 181–217. doi:10.1111/j.1600-065X.1990.tb00565.x. PMID 2196220.
- ^ Arnaout M, Todd R, Dana N, Melamed J, Schlossman S, Colten H (1983). "Inhibition of phagocytosis of complement C3- or immunoglobulin G-coated particles and of C3bi binding by monoclonal antibodies to a monocyte-granulocyte membrane glycoprotein (Mol)". J Clin Invest 72 (1): 171–9. doi:10.1172/JCI110955. PMC 1129172. PMID 6874946.
- ^ Mary K. Crow (February 28, 2008). "Collaboration, Genetic Associations, and Lupus Erythematosus". N Engl J Med 358 (9): 956–961. doi:10.1056/NEJMe0800096. PMID 18204099.
- ^ Geoffrey Hom, Robert R. Graham, Barmak Modrek; et al. (February 28, 2008). "Association of Systemic Lupus Erythematosus with C8orf13–BLK and ITGAM–ITGAX". N Engl J Med 358 (9): 900–909. doi:10.1056/NEJMoa0707865. PMID 18204098.
Further reading
- Stewart M, Thiel M, Hogg N (1996). "Leukocyte integrins.". Curr. Opin. Cell Biol. 7 (5): 690–6. doi:10.1016/0955-0674(95)80111-1. PMID 8573344.
- Todd RF, Petty HR (1997). "Beta 2 (CD11/CD18) integrins can serve as signaling partners for other leukocyte receptors.". J. Lab. Clin. Med. 129 (5): 492–8. doi:10.1016/S0022-2143(97)90003-2. PMID 9142045.
- Schymeinsky J, Mócsai A, Walzog B (2007). "Neutrophil activation via beta2 integrins (CD11/CD18): molecular mechanisms and clinical implications.". Thromb. Haemost. 98 (2): 262–73. doi:10.1160/th07-02-0156. PMID 17721605.
PDB gallery
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1bho: MAC-1 I DOMAIN MAGNESIUM COMPLEX
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1bhq: MAC-1 I DOMAIN CADMIUM COMPLEX
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1idn: MAC-1 I DOMAIN METAL FREE
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1ido: I-DOMAIN FROM INTEGRIN CR3, MG2+ BOUND
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1jlm: I-DOMAIN FROM INTEGRIN CR3, MN2+ BOUND
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1m1u: AN ISOLEUCINE-BASED ALLOSTERIC SWITCH CONTROLS AFFINITY AND SHAPE SHIFTING IN INTEGRIN CD11B A-DOMAIN
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1mf7: INTEGRIN ALPHA M I DOMAIN
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1n9z: INTEGRIN ALPHA M I DOMAIN MUTANT
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1na5: INTEGRIN ALPHA M I DOMAIN
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External links
- Integrin alphaM at the US National Library of Medicine Medical Subject Headings (MeSH)
- Mouse CD Antigen Chart
- Human CD Antigen Chart
- ITGAM Info with links in the Cell Migration Gateway
Proteins: complement system (C, L, A)
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Activators/enzymes |
Early |
- A: Factor B
- Factor D
- Factor P/Properdin
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Middle |
- C3-convertase
- C5-convertase
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Late |
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Inhibitors |
- CLA: C1-inhibitor
- Decay-accelerating factor/CD59
- Factor I
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Complement receptors |
- CR1
- CR2
- CR3
- CR4
- CD11b/CD11c/CD18
- Anaphylatoxin
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Integrins
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Alpha |
- A1
- A2
- A3
- A4
- A5
- A6
- A7
- A8
- A9
- A10
- A11
- AD
- AE
- AL
- AM
- AV
- AX
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Beta |
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Dimers |
Cytoadhesin receptor: |
- Integrin alpha6beta4
- Glycoprotein IIb/IIIa
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Fibrinogen receptor: |
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Fibronectin receptor: |
- Integrin alpha2beta1
- Integrin alpha4beta1
- Integrin alpha5beta1
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Leukocyte-adhesion receptor: |
- LFA-1
- Macrophage-1 antigen
- Integrin alphaXbeta2
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Very late antigen receptor: |
- Integrin alpha1beta1
- Integrin alpha2beta1
- Integrin alpha3beta1
- VLA-4
- Alpha-5 beta-1
- Integrin alpha6beta1
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Vitronectin receptor: |
- Alpha-v beta-3
- Alpha-v beta-5
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see also cell surface receptor deficiencies
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UpToDate Contents
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English Journal
- Cimetidine suppresses lung tumor growth in mice through proapoptosis of myeloid-derived suppressor cells.
- Zheng Y, Xu M, Li X, Jia J, Fan K, Lai G.SourceDepartment of Respiratory and Critical Care Medicine, Fuzong Clinical College of Fujian Medical University, Fuzhou General Hospital, Fuzhou, Fujian 350000, PR China.
- Molecular immunology.Mol Immunol.2013 May;54(1):74-83. doi: 10.1016/j.molimm.2012.10.035. Epub 2012 Dec 5.
- Cimetidine, a histamine type-2 receptor antagonist, is known to inhibit the growth of several tumors in human and animals, however the mechanism of action underlying this effect remains largely unknown. Here, in the mice model of 3LL lung tumor, cimetidine showed significant inhibition of tumor grow
- PMID 23220070
- Matrix metalloproteinase-12 contributes to neuroinflammation in the aged brain.
- Liu Y, Zhang M, Hao W, Mihaljevic I, Liu X, Xie K, Walter S, Fassbender K.SourceDepartment of Neurology, University of the Saarland, Homburg/Saar, Germany. Electronic address: a.liu@mx.uni-saarland.de.
- Neurobiology of aging.Neurobiol Aging.2013 Apr;34(4):1231-9. doi: 10.1016/j.neurobiolaging.2012.10.015. Epub 2012 Nov 16.
- During aging the brain displays an increased proinflammatory status, which is associated with the pathogenesis of aging-related diseases such as Alzheimer's and Parkinson diseases. Matrix metalloproteinases (MMPs) facilitate the migration of inflammatory cells in tissues and modulate their inflammat
- PMID 23159549
Japanese Journal
- Type II NKT Cells Stimulate Diet-Induced Obesity by Mediating Adipose Tissue Inflammation, Steatohepatitis and Insulin Resistance
- Satoh Masashi,Andoh Yasuhiro,Clingan Christopher Stuart,Ogura Hisako,Fujii Satoshi,Eshima Koji,Nakayama Toshinori,Taniguchi Masaru,Hirata Noriyuki,Ishimori Naoki,Tsutsui Hiroyuki,Onoé Kazunori,Iwabuchi Kazuya
- PLoS One 7(2), e30568, 2012-02-22
- … CD11b^[+] macrophages (Mφ) were another major subset of cells in adipose tissue infiltrates, and they were divided into F4/80^[high] and F4/80^[low] cells. …
- NAID 120004043739
- 2)流産における免疫学的機序の解明 : 免疫グロブリン治療は流産抑止に有効か(シンポジウム1「流産の原因と対策」,第63回日本産科婦人科学会・学術講演会)
- 島田 茂樹
- 日本産科婦人科學會雜誌 63(12), 2153-2166, 2011-12-01
- … Flow cytometric analyses demonstrated that the proportion of CD11b-positive cells in the CFSE-labeled transferred cells was higher in placental mononuclear cells than in spleen. … These results suggest that CD11b-positive macrophages are preferentially recruited to placentas compared with other cell populations. …
- NAID 110008799035
Related Links
- CD11b抗原は、インテグリンαM鎖として知られています。CD18抗原(インテグリンβ2鎖)とともに、Mac-1抗原(CD11b/CD18、αM/β2、CR3、iC3bR、Mo1)を形成します。CD11bは、分子量が170または165kDaのⅠ型膜貫通糖タンパクで ...
- CD11b MicroBeadsは、CD11b発現に基づいて、ヒトおよびマウス細胞をポジティブセレクション又はディプリーションするために開発されました。 ... クローン TÜK4 は、ヒトCD14抗原を認識し、霊長類CD14と交差性があります。 CD14抗原は ...
Related Pictures
★リンクテーブル★
[★]
- 英
- adhesion molecule
- 同
- 接着因子
- 関
接着分子のファミリー
白血球の相互作用に関与している接着分子 (IMM.87)
白血球の相互作用に関与している免疫グロブリンスーパーファミリーの接着分子 (IMM.329)
-接着分子
-細胞接着分子
-カドヘリン
[★]
- 英
- leukocyte, leucocyte (Z), white blood cell (Z), WBC, white corpuscle, white cell
- 関
- 赤血球、血球、血液
白血球
基準値
- 4000-9000 (/μl) (2007前期解剖学授業プリント)
- 異常値の出るメカニズム第5版
- 5000- 8400 (/μl) (健常者の2/3)
- 4500-11000 (/μl) (95%範囲)
年齢との関連
生理的な変動
- 精神的ストレス↑ → 交感神経の刺激により好中球の血管壁遊離が促進されるため
- 午前↓、午後↑
基準値
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07解
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異メ
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流マ
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HIM.A-1
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顆粒球
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好中球
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桿状核球
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40~70
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44~66
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40~60
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4~14
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0~5
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分葉核球
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43~59
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40~70
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好酸球
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2~4
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0~ 4
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2~4
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0~6
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好塩基球
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0~2
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0~0.5
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0~2
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0~2
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無顆粒球
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リンパ球
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25~40
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30~38
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26~40
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20~50
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単球
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3~6
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0~ 5
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3~6
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4~8
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- 07解: 2007前期解剖学授業プリント
- 異メ: 異常値の出るメカニズム第5版 p.91
- 流マ: 流れが分かる実践検査マニュアル上巻 p.10
(margination)
- 1. 赤血球は軽く早く流れるので血管の中央をながれ、白血球は血管のへりを流れている
(rolling)
(adheresion & arrested)
(transmigration)
- 6. 白血球と血管内皮細胞に発現しているPECAM-1(CD31)がお互い接着し、白血球が血管内皮細胞の間隙を通って細胞外マトリックスに入る
白血球の染色
- 好酸性:赤く染まる→ヘモグロビン
- 好塩基性:青く染まる→リボソーム、核内のヒストン蛋白
- 好酸性でも好塩基性でもない:淡いピンクに染まる
- MPOをもつ:顆粒球(前骨髄球~分葉核球)、単球(前単球~単球)
- MPOをもたない:リンパ球系細胞
- 好中球:長鎖エステルを分解
- 単球:短鎖エステルを分解
関節液
- 炎症 感染
- 200 2000 20000
- 500 5000 50000
臨床関連
- 白血球のインテグリンが欠損または減少する先天性疾患
- 反復性の細菌皮膚感染
- SIRSの診断基準:<4,000/ul or >12,000/ul
[★]
- 英
- integrin, integrins
- 関
インテグリン IMM.87
[★]
- 英
- leukocyte adhesion deficiency syndrome, leukocyte adhesion deficiency, LAD
- 同
- 白血球接着異常症
- 関
- 免疫不全症候群
- 好中球機能異常症 phagocytic cell deficiency
概念
病因
- 遺伝子異常により、白血球における接着分子の発現異常を来すことによる
-
- β2-インテグリン(CD18)(CD11a:CD18/CD11b:CD18/CD11c:CD18)の欠損
- セレクチンのリガンド;ルイス型糖鎖の欠損:type II
疫学
遺伝
病態
- 白血球表面の接着分子 → 感染炎症部位に白血球が浸潤不能 → 感染症遷延
症状
- 生後すぐに反復感染する
- 化膿性細菌や真菌への重篤な感染症。難治性の皮膚感染、中耳炎、副鼻腔炎などの反復感染
- delayed separation of umbilicus
診断
検査
- 白血球数:増多 ← 持続性の顆粒球増多症
- 好中球数:正常
治療
予後
予防
[★]
- 同
- intercellular adhesion molecule 1
- 関
- ICAM、ICAM-1:CD54
[★]
- 同
- integrin αMβ2&Mac-1
- 同
- integrin αMβ2&Mac-1
[★]
- 同
- leucine-6, CD1A through E
種類
発現組織
- 胸腺皮質、ランゲルハンス細胞、樹状細胞、B細胞(CD1c)、腸上皮、平滑筋、血管上皮(CD1d)
分子量
機能
- MHC class I-like molecule, associated with β2-microgloulin. Has specialized role in presentation of lipid antigens