The recommendation to use tissue culture grade water is primarily to ensure there are no trace elements or contaminants present that could impact the metabolic health of the cells being screened. The incubation period is relatively brief and cells are not likely to be negatively impacted. The use of sterile filtered or autoclaved water will not negatively impact the functionality of the kit. It would be up to the end user to deviate from the recommended protocol.
￥99,200
出荷予定日2025年6月02日
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フォーム
liquid
使用法
1 kit sufficient for 500 tests
包装
pkg of 1 kit
保管条件
dry at room temperature
テクニック
protein quantification: suitable
λmax
490 nm
アプリケーション
cell analysis
detection
検出方法
colorimetric
保管温度
−20°C
関連するカテゴリー
詳細
Tox7はSigmaのCytoToxicity Kitシリーズのひとつです。このキットの基本は、細胞膜損傷および細胞毒性の指標として細胞からの脱水素酵素（LDH）放出を測定することです。この方法は、細胞媒介細胞毒性アッセイにおける51Cr放出の測定、ならびに試験物質と細胞との相互作用で生じる従来の細胞毒性の測定に代わる手段として使用されてています。
アプリケーション
生物化学的／生理学的作用
乳酸脱水素酵素アッセイは、総細胞質乳酸脱水素酵素（LDH）により細胞数を測定するか、培地に放出された細胞質LDHの量に従って膜完全性を測定する手段です。この方法はシンプルかつ正確であり、再現性ある結果が得られます。このアッセイは、LDHによるNADの還元に基づいています。テトラゾリン色素が可溶性の有色ホルマゼン誘導体に化学量論的に変換されるとき、この還元型NAD（NADH）が使用されます。
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適用法令
試験研究用途を考慮した関連法令を主に挙げております。化学物質以外については、一部の情報のみ提供しています。 製品を安全かつ合法的に使用することは、使用者の義務です。最新情報により修正される場合があります。WEBの反映には時間を要することがあるため、適宜SDSをご参照ください。
毒物及び劇物取締法
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PRTR
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消防法
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Jan Code
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試験成績書（COA）
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資料
Quality control guidelines to maintain high quality authenticated and contamination-free cell cultures. Free ECACC handbook download.
Cell based assays for cell proliferation (BrdU, MTT, WST1), cell viability and cytotoxicity experiments for applications in cancer, neuroscience and stem cell research.
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in the TOX7, it describes that the 25 ml of 1× LDH Assay Cofactor Preparation by adding 25 ml of tissue culture grade water to the bottle of lyophilized cofactors (Catalog Number L2527). Can I use Sterile Filtered and Autoclaved Sterile water to prepare?
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How do i estimate the LDH release? what is the equation?
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The TOX7 kit is utilized primarily as a cell viability assay based upon cellular metabolic activity. LDH reduces NAD+ which is then converted to a tetrazolium dye. This dye is then solubilized and read at 490nm. The resulting absorbance in associated with cell density or viability.
Please refer to the Product Information Sheet for more information regarding this product: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/336/418/tox7bul.pdf
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Can TOX7, In Vitro Toxicology Assay kit be used to quantitate the amount of LDH in my samples?
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This assay kit was designed as a semi-quantitative assay for LDH. The change in the OD between the treated samples and control samples is to be compared and is generally reported as a fold increase/decrease from the control. The kit does not contain a LDH standard. Product L3916 can be used as an LDH standard for this assay. The detection range (LDH units/ml) for the kit has not been established.
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The TOX7 dye solution has a precipitate present. Can I still use it?
1 回答-
Product No. L2277 LDH Assay Dye Solution is a saturated solution and some precipitation may appear upon thawing. The product will partially re-solubilize when warmed to 37°C and the resulting solution can be decanted away from any remaining precipitate. Precipitated dye added to reactions, or removed from the solution will not affect the performance or results obtained from this kit.
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Can you use tissue explants in product TOX7, In Vitro Toxicology Assay Kit, Lactic Dehydrogenase based?
1 回答-
Unfortunately, we have not tested product TOX7, In Vitro Toxicology Assay Kit, on tissue samples. If the tissue is minced well and can be lysed completely with the lysis buffer for the cells, it may work to determine cell biomass. The following paper modified the assay for use with explants.Benyo, D.F., et al., "Hypoxia Stimulates Cytokine Production by Villous Explants from the Human Placenta", The Journal of Clinical Endocrinology & Metabolism 82(5), 1582-1588 (1997).Assessment of explant viability was routinely monitored by measuring the release of LDH into medium relative to a 1% Triton X-100 (Sigma)-lysed positive control. The assay employed a modification of the TOX7 viability kit supplied by Sigma-Aldrich and entailed adding a 20-fold volume excess of assay mixture (160 mL) to the medium sample tested (8 mL). The assay mixture consisted of equal volumes of substrate (lactate), enzyme (diaphorase), and dye (nitro blue tetrazolium) solutions, and the reaction was allowed to proceed for 20 min in a microtiter plate before the addition of 0.1 vol 1N HCl. Color change was quantified by reading the absorbance at 490 nm, and the percent cell death calculated.
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Will Triton X100 interfere with the TOX7 In Vitro Toxicology Kit assay?
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Triton X100 will not interfere with TOX7 assay.
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What is the minimum number of cells to use in the LDH assay, Product TOX7, In Vitro Toxicology Assay Kit?
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Using Product TOX7, In Vitro Toxicology Assay Kit, the minimum cell number for best response is 2 x 104.
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What is the Department of Transportation shipping information for this product?
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Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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I am using a protease inhibitor cocktail in the cell culture media. Will this interfere with the TOX7 In Vitro Toxicology assay?
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The protease inhibitor cocktails do not interfere with LDH activity. Media from cells cultured with protease inhibitors can be used in this assay.
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I'm using the TOX7 In Vitro Toxicology Assay Kit. I do not have a 690 nm filter to use for a reference/background. What can I use?
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The reference wavelength needs to be greater than the absorbance spectra of the assay. The greater the difference between the assay wavelength and the reference wavelength, the better. A reference wavelength of 590 nm or greater can be used with the substrate for this assay. If a reference wavelength is not available, the assay will work. The use of the reference wavelength increases the signal to noise ratio to give a better assay range.
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