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siRNA module of targeted Survivin gene and application thereof

A molecular and base technology, applied in the field of siRNA molecules, can solve problems such as no expression

Active Publication Date: 2011-01-05
BIOMICS BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found that Survivin gene is generally expressed in embryonic tissues and malignant tumors, such as breast cancer, gastric cancer, kidney cancer, melanoma, intestinal cancer, neuroblastoma and ovarian cancer; but in differentiated and mature tissues (except placenta, Proliferative phase endometrium, secretory phase endometrium have a small amount of expression) and no expression in adjacent normal tissues

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  • siRNA module of targeted Survivin gene and application thereof
  • siRNA module of targeted Survivin gene and application thereof
  • siRNA module of targeted Survivin gene and application thereof

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[0024] Various methods can be used to prepare siRNA, such as: chemical synthesis, in vitro transcription, enzyme-cut long-chain dsRNA, vector expression of siRNA, PCR synthesis of siRNA expression elements, etc. The emergence of these methods provides researchers with options. Better access to gene silencing efficiency.

[0025] The siRNA molecules of the present invention can be used as active ingredients of antitumor drugs. Tumor diseases include liver cancer, lung cancer, leukemia, gastric cancer, cervical cancer, multiple myeloma, skin squamous cell carcinoma, colon cancer, melanoma, bladder cancer, osteosarcoma. The inhibitory effect of the medicine of the invention on liver cancer is particularly obvious.

[0026] As another expression form of the siRNA molecule, it can be prepared in the form of a DNA expression cassette, such as: U6 promoter-siRNA transcription template-H1 promoter.

[0027] For the sake of brevity, "U6 promoter-siRNA transcription template-H1 promot...

Embodiment 1

[0039] Preparation of siRNA molecular library

[0040] 1. Main instruments, reagents and materials

[0041] 1.1 Instruments: PCR instrument (ABI company); electrotransfer instrument (BIO-RAD, MicroPulser); centrifuge (Eppendorf), long-wavelength ultraviolet lamp, etc.

[0042] 1.2 Materials and reagents: 1kb plus DNA Ladder (invitrogen); DNase I (Roche); MnCl 2 (BBI); Phosphate linker (Sigma-aldrich); ATP (BBI); BSA (NEB); BmsbI (NEB); T4 DNA ligase (NEB); Agarose (BBI); dNTP (Shanghai Sangon Bioengineering Technology Service Co., Ltd.); Phenol Chloroform Extraction Reagent (Shanghai Sangon Bioengineering Technology Service Co., Ltd.); Low Molecular Weight DNA Ladder (NEB); EcoP15I (NEB); T4 DNA polymerase (NEB); FokI enzyme (NEB); SfiI enzyme (NEB); Competent cells (invitrogen); pU6H1-GFP expression vector (NT Oimcs, USA). Gel extraction kit: QIAEX II Gel Extraction Kit (QIAGEN); Plasmid extraction kit (Biometics Biotechnology Co., Ltd.). Other biochemical reagents were p...

Embodiment 2

[0056] Preparation of siRNA expression cassette and screening of target sites

[0057] 1. Main instruments, reagents and materials

[0058] 1.1 Instruments: PCR instrument (ABI); real-time quantitative PCR instrument (Bio-Rad); gel electrophoresis equipment (Beijing Liuyi Instrument Factory); long-wavelength ultraviolet lamp; cell incubator (Thermo), etc.

[0059] 1.2 Materials and reagents: 1kb plus DNA Ladder (invitrogen); Pfu DNA polymerase (Biometics Biotechnology Co., Ltd.); Agarose (BBI); dNTP (Shanghai Sangon Bioengineering Technology Service Co., Ltd.); agarose gel Purification kit (Biometics Biotechnology Co., Ltd.), Lipofectamin TM 2000 (invitrogen), DMEM medium (Gibco), TurboCapture mRNA kit (QIAGEN), SensiMix TM One-Step Kit (Quantace), etc. Other biochemical reagents were purchased from Shanghai Sangon Bioengineering Technology Service Co., Ltd.

[0060] 1.3PCR primers (synthesized by Biomaike Biotechnology Co., Ltd.):

[0061] 5'U6 promoter primer: 5'-AAGGT...

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Abstract

The invention relates to a siRNA module of targeted Survivin gene and application thereof in preparing tumor-resisting drugs. The siRNA molecule sense strand is shown in SEQ ID NO:2, and an antisense molecule is shown in SEQ ID NO:3; the antisense strand can be specifically combined with the mRNA of the Survivin gene to degrade the mRNA, thus interfering the posttranscriptional translation process to obtain the purpose of treating tumor.

Description

technical field [0001] The invention relates to a siRNA molecule targeting Survivin gene and its application in the preparation of antitumor drugs. Background technique [0002] Survivin (Survivin) is a new member of the Inhibitorofapoptosis (IAP) family, and is the strongest apoptosis inhibitor found so far. Survivin has complex functions, inhibits apoptosis, promotes cell transformation and participates in cell mitosis, angiogenesis and tumor cell drug resistance. The Survivin gene was screened and cloned in the human genome library by Ambrosini et al. (Nature Med, 1997, 3(8): 917-921). The gene is 15KB in length, located at 17q25, and contains 4 exons and 3 introns. Contains, Survivin gene encoding product is a protein composed of 142 amino acids, molecular weight 16.2KD. Studies have shown that the high expression of Survivin can inhibit the apoptosis induced by various factors such as p53 and caspases. It has been confirmed by transgenic technology that the mechanism...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N15/11A61K48/00A61P35/00A61P35/02
Inventor 李铁军朱远源陆毅祥孙云成
Owner BIOMICS BIOTECH
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