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Small interfering RNA (siRNA) inhibiting expression of myostatin (MSTN) gene in chicken and application thereof

A myogenesis inhibition and gene expression technology, applied in the field of siRNA that inhibits the expression of chicken myostatin gene, can solve the problems of long generation interval, hybridization of meat yield and meat quality traits, low breeding efficiency, etc. The effect of meat volume

Inactive Publication Date: 2011-05-04
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, not only the generation interval is long, the selection intensity is low, but also the traits of meat yield and meat quality are hybridized with other quality traits, resulting in low breeding efficiency and slow genetic progress

Method used

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  • Small interfering RNA (siRNA) inhibiting expression of myostatin (MSTN) gene in chicken and application thereof
  • Small interfering RNA (siRNA) inhibiting expression of myostatin (MSTN) gene in chicken and application thereof
  • Small interfering RNA (siRNA) inhibiting expression of myostatin (MSTN) gene in chicken and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the design and synthesis of siRNA

[0023] According to the myostatin gene (MSTN) published by NCBI, three pairs of siRNA were designed as follows:

[0024] The first pair (siRNA-9): 5'-GCUAGCAGUCUAUGUUUAUTT-3' (SEQ ID NO: 1);

[0025] 3'-TTCGAUCGUCAGAUACAAAUA-5' (SEQ ID NO: 2);

[0026] The second pair (siRNA-338): 5'-CCACAACCGAGACGAUUAUTT-3' (SEQ ID NO: 3);

[0027] 3'-TTGGUGUUGGCUCUGCUAAUA-5' (SEQ ID NO: 4);

[0028] The third pair (siRNA-926): 5'-GCUCCGGAGAAUGUGAAUUTT-3' (SEQ ID NO: 5);

[0029] 3'-TTCGAGGCCUCUUACACUUAA-5' (SEQ ID NO: 6);

[0030] Control siRNA (siRNA-NC): 5'-UUCUCCGAACGUGUCACGUTT-3';

[0031] 3'-TTAAGAGGCUUGCACAGUGCA-5'.

[0032] The above 4 pairs of siRNA are chemically synthesized, and the chemically synthesized siRNA is a vacuum-dried product, and the product is dried at the bottom of the tube and becomes a dry powder.

Embodiment 2

[0034] Example 2, Expression of MSTN gene in chicken embryo myoblasts after siRNA transfection

[0035] Three pairs of siRNAs prepared in Example 1 were used to carry out transfection experiments on chicken embryo myoblasts, and the specific steps were as follows:

[0036] 1. Take the 9-day-old Bailaihang egg (purchased from the experimental chicken farm of the Animal Science and Technology College of China Agricultural University) and tear the inner shell membrane, allantoic membrane and amniotic membrane of the egg with sterilized elbow forceps, clamp out the chicken embryo, and put it in Rinse blood stains and impurities in sterile petri dishes that have been added with DPBS.

[0037] 2. Move the embryo to the dissecting microscope, use ophthalmic tweezers to remove the breast skin of the chick embryo, expose the pectoral muscle, and cut the muscle from the rib cage. Put into a Petri dish filled with DPBS solution. Separate the other half of the pectoralis musculature in ...

Embodiment 3

[0047] Embodiment 3, the expression level of MSTN gene in living chicken embryo after siRNA transfection

[0048] Three pairs of siRNA prepared in Example 1 and a control siRNA (siRNA-NC) were used to perform transfection experiments on live chicken embryos, and the experimental conditions are shown in Table 1.

[0049] Table 1 Live chicken embryo transfection experiment situation

[0050] injection group

Number of eggs injected

Number of 3-day-old chick embryos collected

number of chicks

siRNA-9

47

7

2

siRNA-338

42

9

4

siRNA-926

44

8

2

siRNA-NC

23

7

0

NC

79

8

6

[0051] The 3-day-old chick embryo is the chick embryo hatched 3 days after injection.

[0052] The specific steps of live chicken embryo transfection experiment are as follows:

[0053] 1. Mix 12 μL Opti-MEM and 3 μL siRNA to make solution A; mix 12 μL Opti-MEM and 3 μL Liposome 2000 ...

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Abstract

The invention discloses a small interfering RNA (siRNA) inhibiting expression of a myostatin (MSTN) gene in chicken and application thereof. The invention provides an siRNA which acts on the MSTN gene, wherein the siRNA is a) a double-stranded RNA composed of the sequence 1 and the sequence 2 in a sequence table, b) a double-stranded RNA composed of the sequence 3 and the sequence 4 in the sequence table or c) a double-stranded RNA composed of the sequence 5 and the sequence 6 in the sequence table. The invention obtains the siRNA effectively inhibiting expression of the MSTN gene in chicken,real-time quantitative polymerase chain reaction (PCR) verifies that the siRNA effectively reduces expression of MSTN in molecular biology, and chicken with skeletal muscles obviously increased are successively obtained through microinjection test in embryology. The above results show that the siRNA provided by the invention can be used for breeding chicken, thus improving the meat yields of broilers, especially high quality chicken.

Description

technical field [0001] The invention relates to a siRNA for inhibiting chicken myostatin gene expression and application thereof. Background technique [0002] In 2006, my country's poultry meat output was 15.066 million tons, second only to the United States, ranking second in the world, an increase of 6.5 times compared with 1985, while the world's poultry meat output only increased by 1.4 times during the same period. According to FAO statistics, the number of broiler chickens slaughtered in my country increased from 2.129 billion in 1990 to 7.695 billion in 2006, a net increase of 5.566 billion. Chicken production increased from 2.6632 million tons in 1990 to 10.701 million tons in 2006, a net increase of 8.0378 million tons. At present, my country's poultry meat production accounts for 18.7% of the total meat, and the per capita share is 1.5 kg. Compared with the world poultry meat production ratio of 30.3%, there is still a lot of room for improvement. [0003] White...

Claims

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Application Information

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IPC IPC(8): C12N15/11C12N15/88
Inventor 杨宁孙研研蒋斌郑江霞陈思睿
Owner CHINA AGRI UNIV
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