世界*实验材料供应商 Dianova 正式授权上海起发为其中国代理， Dianova 在一直是行业的*,一直为广大科研客户提供zui为的产品和服务,上海起发一直秉承为中国科研客户带来的产品，的服务，签约 Dianova 就是为了给广大科研客户带来更加完善的产品和服务,您的满意将是我们zui大的收获

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Dianova公司为德国的病理免疫组化产品供应商，具备的抗体制备工艺及严格的质控系统，产品在上享有良好的声誉。

克隆号为H09的IDH1（isocitrate dehydrogenase 1, 异柠檬酸盐脱氢酶1）鼠单克隆抗体为Dianova公司近期推出的产品之一，此抗体可特异性的检测脑组织肿瘤中IDH1基因的R132H点突变。IDH1基因的第132密码子的杂合突变是II 和III级神经胶质瘤（根据WHO的肿瘤学分类）的频发事件。在大约70％的星形胶质细胞瘤和少突神经胶质细胞瘤可发现IDH1基因的R132H点突变。

IDH1基因R132H突变在部分脑肿瘤中的频发现象使克隆号为H09的IDH1抗体可高灵敏性和高特异性的用于此类肿瘤的鉴别诊断中：如从原发性胶质母细胞瘤中区分出间变性星形细胞瘤、从毛细胞型星形细胞瘤或室管膜（细胞）瘤中区分出弥漫性星形细胞瘤（WHO分类II级），也可以用于具有IDH1突变的肿瘤细胞浸润前沿的与反应性神经胶质增多症的区分。因此，由于其高灵敏性和高特异性，此抗体在脑部肿瘤的分类分级中以及在检测单一或少量浸润肿瘤细胞时是非常有用的。

DIA-404 – Anti-CD4 (Ms) from Rat (Clone: GHH4) for mouse FFPE tissue – 200 µl

Art.-Nr.                            DIA-404

Specificity                         CD4 (T4, MCH II co-receptor, T-helper cells)

Species Reactivity                  Mouse

Host Species                         Rat

Isotype                              IgG2b

Clone                                 GHH4

Clonality (Mono-/Polyclonal)          monoclonal

Application                       Immunohistochemistry (Paraffin-embedded Sections)

Conjugation                           unconjugated

Format                                lyophilisate

                                      antibody purified (from culture supernatant)

Product line / Topic                   CD markers

                                       immunohistochemistry

Intended Use                            for Research Use Only

Search Code                             DIA404

Manufacturer / Brand                    dianova

Reactivity

Antibody clone GHH4 has been developed and validated for the detection of murine CD4 in formalin-fixed paraffin-embedded tissue sections (mouse FFPE). Clone GHH4 identifies T helper cells in murine FFPE tissue by IHC.
CD4 is a marker for T helper cells. Besides this subpopulation of mature T cells (helper/inducer), CD4 is also expressed on most thymocytes and weakly on macrophages and dendritic cells.
Antigen recognition and subsequent T-cell activation is controlled by the interaction between TCR (T-cell receptor) and pMHC (peptide-major histocompatibility complexe). T-cell activation is often enhanced by a close cooperation of the TCR with two different co-receptors: CD8 and CD4. CD4 is a nonpolymorphous 55 kD glycoprotein belonging to the immunoglobulin superfamily. It acts as a co-receptor with the TCR during antigen-induced T cell activation and thymic differentiation by binding MHC class II and plays an important role both in T cell development and in optimal functioning of mature T cells. In T cells, CD4 associates with protein tyrosine kinase p56lck through its cytoplasmic tail.
In humans, CD4 is expressed in the majority of T-cell lymphomas. CD4 plays an important role in the classification of lymphocytes in inflammatory lesions and malignant lymphomas. CD4 serves as HIV receptor on T cells, macrophages and brain and is downregulated by HIV proteins during AIDS progression.

IHC for CD4 in mouse FFPE tissue

Mouse spleen: The monoclonal antibody clone GHH4 specifically stains CD4 in standard FFPE mouse spleen. Incubation with antibody clone GHH4 (10μg/ml, corresponding to a 1:100 dilution) for 1h at RT. Detection with ImmPRESS HRP anti-Rat from Vector Laboratories (Picture courtesy of Chris Bonnas, Synaptic Systems, Göttingen, Germany).

General References:

1. Foti M et al. p56Lck anchors CD4 to distinct microdomains on microvilli. Proc Natl Acad Sci U S A. 2002, 99: 2008-13.
2. Brady et al. Crystal structure of domains 3 and 4 of rat CD4: relation to the NH2-terminal domains. Science 1993, 260:979-83
3. Janeway CA et al. The T cell receptor as a multicomponent signalling machine: CD4/CD8 coreceptors and CD45 in T cell activation. Annu Rev Immunol. 1992, 10: 645-74.
4. Bierer BE et al. The biologic roles of CD2, CD4, and CD8 in T-cell activation. Annu Rev Immunol. 1989, 7: 579-99.
5. Fleischer B et al. Function of the CD4 and CD8 molecules on human T lymphocytes: regulation of T cell triggering. Jour-nal of Immunology 1996, 136: 1625-8
6. Wilde DB et al. Evidence implicating L3T4 in class II MHC antigen reactivity; monoclonal antibody GK1.5 (anti-L3T4a) blocks class II MHC antigen-specific proliferation, release of lymphokines, and binding by cloned murine helper T lym-phocyte lines. J Immunol. 1983, 131: 2178-83.
7. Dialynas et al. Characterization of the murine T cell surface molecule, designated L3T4, identified by monoclonal anti-body GK1.5: similarity of L3T4 to the human Leu-3/T4 molecule. J Immunol. 1983, 131: 2445-51.

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