WO2014206279A1 - 乳酸菌及发酵谷物或谷物胚芽提取物的制备方法与用途 - Google Patents

乳酸菌及发酵谷物或谷物胚芽提取物的制备方法与用途 Download PDF

Info

Publication number
WO2014206279A1
WO2014206279A1 PCT/CN2014/080665 CN2014080665W WO2014206279A1 WO 2014206279 A1 WO2014206279 A1 WO 2014206279A1 CN 2014080665 W CN2014080665 W CN 2014080665W WO 2014206279 A1 WO2014206279 A1 WO 2014206279A1
Authority
WO
WIPO (PCT)
Prior art keywords
lactic acid
acid bacteria
grain
fermented
tumor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/080665
Other languages
English (en)
French (fr)
Inventor
董英
肖香
张家艳
徐斌
崔恒林
赵延胜
周兴华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu University
Original Assignee
Jiangsu University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201310261606.6A external-priority patent/CN103468600B/zh
Priority claimed from CN201310264094.9A external-priority patent/CN103445068B/zh
Priority claimed from CN201310259726.2A external-priority patent/CN103461858B/zh
Application filed by Jiangsu University filed Critical Jiangsu University
Publication of WO2014206279A1 publication Critical patent/WO2014206279A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00Microorganisms; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20Bacteria; Culture media therefor
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/135Bacteria or derivatives thereof, e.g. probiotics
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
    • A23L7/00Cereal-derived products; Malt products; Preparation or treatment thereof
    • A23L7/10Cereal-derived products
    • A23L7/104Fermentation of farinaceous cereal or cereal material; Addition of enzymes or microorganisms
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
    • A23L7/00Cereal-derived products; Malt products; Preparation or treatment thereof
    • A23L7/10Cereal-derived products
    • A23L7/152Cereal germ products
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00Microorganisms; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20Bacteria; Culture media therefor
    • C12N1/205Bacterial isolates
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00Lactic or propionic acid bacteria
    • A23V2400/11Lactobacillus
    • A23V2400/113Acidophilus
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00Lactic or propionic acid bacteria
    • A23V2400/11Lactobacillus
    • A23V2400/121Brevis
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00Lactic or propionic acid bacteria
    • A23V2400/11Lactobacillus
    • A23V2400/125Casei
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00Lactic or propionic acid bacteria
    • A23V2400/11Lactobacillus
    • A23V2400/169Plantarum
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12RINDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
    • C12R2001/00Microorganisms ; Processes using microorganisms
    • C12R2001/01Bacteria or Actinomycetales ; using bacteria or Actinomycetales
    • C12R2001/225Lactobacillus
    • C12R2001/25Lactobacillus plantarum

Definitions

  • the invention relates to the field of food biotechnology, and particularly relates to bio-transformation by fermentation of lactic acid bacteria by using cereal or grain germ (barley, wheat germ, etc.) as raw materials, thereby realizing the increase and enrichment of functional active components, and preparing to inhibit tumor cell proliferation. And a fermented extract of tumor growth, the inventive product can be used for the preparation of functional foods, food ingredients or pharmaceuticals. Background technique
  • the number of people worldwide who die from malignant tumors is more than 7 million a year, and the number is still rising.
  • the treatment of cancer mainly includes surgery, chemotherapy, radiotherapy and targeted therapy (immunotherapy, gene therapy, angiogenesis inhibitors and targeted therapy), and its side effects still bring a lot of pain to patients. Therefore, the development of natural safe, non-toxic and anti-tumor active substances and their functional foods or drugs are the cravings of cancer patients.
  • Natural grain or grain germ is rich in a variety of functional substances, such as proteins, flavonoids, polyphenols, etc., with certain antioxidant and anti-tumor properties.
  • functional substances such as proteins, flavonoids, polyphenols, etc.
  • antioxidant and anti-tumor properties due to the low content or activity of functional ingredients, it is difficult to achieve significant effects. Therefore, the use of biotransformation technology to improve the nutritional quality and functional properties of grain or grain germ has attracted the attention of researchers at home and abroad, and has achieved certain results.
  • the Hungarian patent discloses a method for detecting 2,6-dimethoxy-p-benzoquinone as an active substance and an antitumor product thereof (A V emar).
  • the method comprises the steps of: pulverizing the wheat germ, fermenting with commercial baker's yeast, freeze-drying or spray-drying the supernatant, and adding the dry powder to a certain concentration of the aqueous solution to be added to the tumor cell, thereby inhibiting metabolism and metastasis of the tumor cell;
  • the 2,6-dimethoxy-p-benzoquinone was extracted with chloroform or ethanol as a marker, and was quantified by HPLC, but the other components of the extract were not analyzed.
  • the US patent (2010/135580A2) is similar to the Hungarian patent, except that it uses ethanol extraction and obtains the polypeptide from Avemar by molecular sieves and electrophoresis, with a relative molecular mass between 5 and 100 KD, and through cells and animals. Model tests have demonstrated that this range of polypeptides inhibits the growth of tumor cells.
  • Japanese Patent (200510069392.8) discloses a preparation method of an antitumor preparation.
  • the method comprises mixing wheat germ, soybean germ and rice germ in a certain ratio, heating the mixture with 110 ° C hot steam, and heating the steam heating product at 30 ° C for 48 h with a koji (Aspergillus oryzae).
  • the obtained fermentation extract has an antitumor effect with an inhibition rate of 5% to 15%, and the patent does not analyze the antitumor component in the fermentation extract.
  • Lactic acid bacterium is safe, non-toxic, non-pathogenic, and has unique probiotic properties. It is a globally recognized "GRAS" ( generally regarded as safe) grade food microorganism, commonly used in sour milk products, kimchi, Fermented meat products, probiotic drinks and other fermented foods.
  • GRAS globally recognized “GRAS” ( generally regarded as safe) grade food microorganism, commonly used in sour milk products, kimchi, Fermented meat products, probiotic drinks and other fermented foods.
  • GRAS globally recognized as safe
  • the invention selects excellent starting strains from self-separated lactic acid bacteria or commercial lactic acid bacteria, optimizes fermentation conditions, establishes a fermentation process with high yield of fermentation extract and strong anti-tumor activity, and uses the extract to carry out various human tumor cells and Its tumor-bearing animal test confirmed that its extract has significant inhibition of tumor cell proliferation.
  • the invention firstly provides a lactic acid bacteria which is derived from natural fermented kimchi by screening, separation, enrichment and physical and chemical analysis, and then obtains excellent lactic acid bacteria by using grain or grain germ (barley, wheat germ, etc.) as raw materials.
  • the direct-injection fermentation of the lactic acid bacteria obtains a fermentation extract having an activity of inhibiting tumor cell proliferation, and the extract is separated, purified and analyzed.
  • MTT apoptosis and cell cycle method were used to study the anti-tumor function of its components in vitro; the antitumor activity of the extract was studied by using a tumor-bearing nude mouse model (human tumor cells); comprehensive evaluation of the fermentation extract of the present invention Anti-tumor function and explore its action pathway.
  • Lactobacillus Dy-1 its proposed taxonomic name is Lactobacillus plantarum; the strain was sent to the Chinese Academy of Sciences for microbiology research on April 18, 2012 at No. 3, No. 1 Beichen West Road, Chaoyang District, Beijing, China. The deposit of the General Microbiology Center of the China Microbial Culture Collection Management Committee is CGMCC No.6016.
  • the deposit number is CGMCC. No.6016; or choose Commercially available lactic acid bacteria such as one or more of Lactobacillus plantarum, Lactobacillus brevis, Lactobacillus acidophilus, and Lactobacillus case are selected.
  • 1:6 ⁇ 1: 15 ratio preferably 1:7 ratio is added to distilled water, then lactic acid bacteria are added to the grain or grain germ, wherein the lactic acid bacteria account for 2 ⁇ 8% of the quality of fresh grain or grain germ powder, and the mixture is even;
  • the bottle is sealed with gauze, placed in a constant temperature incubator, and fermented at 20 ⁇ 40 °C for 12 ⁇ 72h, wherein the fermentation temperature is preferably 30 ⁇ 35 °C, after fermentation for 24 ⁇ 48 h, the fermentation is 3000 ⁇ 12000g at room temperature.
  • the lactic acid bacteria selected in the step (1) are activated by MRS liquid medium and cultured at a high density, and a protective agent (20% skim milk, 10% trehalose, 14% sodium glutamate, 6% sorbitol, and the like) are added. 6%Vc, or 22% inulin, 12% sodium glutamate, 5% sorbitol), then prepare the directly used lactic acid bacteria Dy-1 starter by vacuum freeze-drying, and seal it in a sterile vacuum packaging bag. Deposit for use.
  • the grain described therein is preferably barley or glutinous rice or buckwheat.
  • the grain germ described therein is preferably a wheat germ or a soybean germ.
  • lactic acid bacteria to ferment cereals or grain germ extracts can be used to prepare anti-tumor functional foods or drug development.
  • the preparation method of the food having anti-tumor function is carried out according to the following steps:
  • the fermented cereal or cereal germ extract of the present invention is added to fermented dairy products and other acidic beverages in a certain ratio to prepare a functional beverage; it can also be added as food ingredients to foods such as bread, noodles, sausages and biscuits.
  • the isolated and purified active fraction is directly used as a functional food or for anti-tumor drug development.
  • the fermented cereal or cereal germ extract of the present invention there is no particular weight requirement for adding the fermented cereal or cereal germ extract of the present invention to a foodstuff, and the amount is usually from 1% to 15%, preferably from 4% to 10% by mass; the extract may also be directly or After separation and purification, it is directly used as food or medicine.
  • the present invention utilizes autonomously isolated lactic acid bacteria to ferment cereal or grain germ to prepare a fermentation extract having anti-tumor function Take the object, with independent intellectual property rights.
  • the invention adopts simple pretreatment (non-high temperature heating) on grain or grain germ, has low production cost, adopts direct-injection fermentation, is convenient, fast, safe and stable, and is convenient for quality control.
  • the invention uses cereal or grain germ as raw material, has wide source and large reserves, and bio-transforms it to significantly improve the biological function and nutritional quality of grain or grain germ, and guides enterprises to apply modern biotechnology to produce healthy and high. Valued products.
  • the present invention studies the anti-tumor activity active ingredients in the extract, and clarifies that the protein or polypeptide with a relative molecular mass below 40KD has significant anti-tumor effect, indicating that the moderate degradation of protein macromolecules during the fermentation of lactic acid bacteria is resistant.
  • An important pathway for tumor activity and also provides a theoretical basis for the development of isolated foods or drugs.
  • Figure 7 Inhibition of HT-29 cell proliferation by crude extract of crude protein and crude polyphenol extraction in FBE
  • the collected kimchi samples were appropriately diluted by gradient and applied to the MRS double-layer plate method.
  • the cells were cultured at 30 ° C for 36 h in an incubator. After the colonies grew, observe the growth of the plates and select the colonies in the plates. Appropriate (30 ⁇ 300) and calcium lysate are obvious for easy picking of colonies, record colony characteristics, select colonies, and pick colonies.
  • the isolated strain was subjected to multiple scribing or coating separation to obtain a pure strain.
  • the impure bacteria are again enriched and separated, the method is the same as above.
  • the acid-producing ability of the obtained strains was compared by the acid-producing gas-producing test to obtain a strain with high acid yield; and the potential facultative anaerobic lactic acid bacteria were obtained by observing the strains which simultaneously produced acid and gas.
  • the PCR product was purified and sequenced by Shanghai Biotech. The sequence is as follows:
  • the 16S rRNA gene sequence of Dy-1 is only 3 bases different from the 16S rRN A gene sequence of Lactobacillus plantar um strain L3, and its similarity is more than 99%, which should belong to the same species. That is Lactobacillus plantarum.
  • the strain was deposited on April 18, 2012 at the General Microbiology Center of the China Microbial Culture Collection Management Committee of the Institute of Microbiology, Chinese Academy of Sciences, No. 3, Beichen West Road, Chaoyang District, Beijing, China.
  • the deposit number is CGMCC No. 6016, its suggested classification name is Lactobacillus plantarum, Lactobacillus plantar called it lactic acid bacteria Dy-1
  • the fermented cereal or cereal germ extract of the present invention is added to human HT-29 colon cancer cells at a concentration of 0.125 4 mg/mL, and cultured for a period of time (for example, 48 hours), and the anti-tumor effect is observed and evaluated. .
  • the method is as follows -
  • the number of living cells of the tumor can be reduced to 50% or less, and the number of living cells can be optimally reduced to 10% or less; Up to 50% or more, up to 90% or more.
  • In vivo anti-tumor function The abdominal cancer of 46-week-old BALB/c nude mice was subcutaneously inoculated into human colon cancer HT-29 cells (inoculation amount: 1 10 6 2 10 7 cells/nude mice), and nude mice were visually observed after 2 15 days. At the inoculation site, the tumor was started and the stomach was started. The tumor-bearing nude mice were randomly divided into 5 groups, namely, the negative control group, the 5-FU positive control group, the high dose group, the low dose group, and the high dose group +5-FU group.
  • wheat germ pulverized fresh wheat germ
  • a 500mL Erlenmeyer flask add 100ml of distilled water to it, add 0.4g of lactic acid bacteria Dy-1 starter, mix evenly;
  • the gauze was sealed and placed in a constant temperature incubator for 24 hours at 30 ° C. After centrifugation at 6500 g / min for 20 min, the supernatant was collected and lyophilized.
  • Example 1 The filtrate in Example 1 was also added to SGC-7901 gastric cancer cells at 0.125 mg/mL, 0.25 mg/ml, 0.5 mg/mK 1.0 mg/mK 2.0 mg/mK 4.0 mg/ml, respectively.
  • the inhibition rate of LFWGE on gastric cancer SGC-7901 cells was determined by MTT assay. The results showed that the concentration of extract was positively correlated with the inhibition rate of tumor cell proliferation, and the maximum inhibition rate reached 89.6%.
  • the lmg/ml LFWGE was added to the SGC-7901 gastric cancer cells, and the cells were cultured for 48 hours, and the cells were collected, and the apoptosis of the cells was detected by flow cytometry. Early apoptosis was 48.5% and late apoptosis was 22.4%. LFWGE of 0.2 mg/ml, 0.4 mg/ml, and 0.8 mg/ml was added to gastric cancer cells, and the cells were cultured for 48 hours, and the cells were collected, and the cell cycle was detected by flow cytometry. The results showed that with the increase of concentration, the phase 1 was also prolonged, and the S phase was shortened, indicating that LFWGE can effectively block the phase 1 of cells.
  • pulverized fresh barley 100 g was mixed with 1 L of distilled water and 4 g of lactic acid bacteria Dy-1 starter, and the mixture was fermented at 250 rpm for 24 h at 30 °C.
  • the obtained fermentation product was centrifuged at 5000 g for 15 min, and the supernatant was collected and freeze-dried to obtain a fermented barley extract (FBE) lyophilized powder.
  • the FBE was dissolved, and the protein was precipitated with 90% saturation of (NH 4 ) 2 S0 4 , centrifuged at 6000 g/min for 15 min, and the precipitate was dissolved in distilled water and dialyzed 3 times with a dialysis bag having a molecular weight of 8000-14000 Da.
  • the LFWGE prepared above was dissolved in physiological saline to prepare an aqueous solution having a concentration of 0.2 g/ml and 0.1 g/ml, and was treated by a sterile membrane for use.
  • Human HT-29 colon cancer cells were inoculated subcutaneously into 4-6 weeks old BALB/c nude mice, and 2 days later, 2g/kg/d, lg/kg/d, 2g/kg/d+5-FU (25 mg) /kg/d, ip, 7 days)
  • the dose of LFWGE was administered to the tumor-bearing nude mice for 30 days of continuous gavage, and the same dose of saline group and intraperitoneal injection of 5-FU group (25 mg/kg/).
  • TNF-a tumor necrosis factor
  • IFN- ⁇ interferon
  • IL-4 interleukin-4
  • the FBE prepared above was dissolved in physiological saline to a concentration of 0.2 g/ml and 0.1 g/ml, and was treated by a sterile membrane for use.
  • Human HT-29 colon cancer cells were inoculated subcutaneously into 4-6 week old BALB/c nude mice, and 2 days later, 2g/kg/d, lg/kg/d, 2g/kg/d+5-FU ( 25 mg/kg/d, ip, 7 days)
  • the dose of FBE was administered to the tumor-bearing nude mice for 30 days, and the same dose of saline group and intraperitoneal injection of 5-FU group (25 mg/).
  • SOD superoxide dismutase
  • GSH-PX glutathione-peroxidase
  • MDA malondialdehyde
  • interferon IFN- ⁇
  • interleukin-4 Fig. 21
  • tumor necrosis factor TNF- ⁇
  • Fig. 22 The concentration of interferon (IFN- ⁇ ) (Fig. 20), interleukin-4 (Fig. 21) and tumor necrosis factor (TNF- ⁇ ) (Fig. 22) in the serum of tumor-bearing nude mice was determined by enzyme-linked immunosorbent assay kit. show, FBE simultaneously can be increased IFN- Y, the content of interleukin-4 and TNF- ⁇ in.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biotechnology (AREA)
  • Zoology (AREA)
  • Organic Chemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Genetics & Genomics (AREA)
  • Wood Science & Technology (AREA)
  • Food Science & Technology (AREA)
  • Microbiology (AREA)
  • Polymers & Plastics (AREA)
  • Nutrition Science (AREA)
  • Virology (AREA)
  • Biomedical Technology (AREA)
  • Tropical Medicine & Parasitology (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Mycology (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

一种乳酸菌Lactobacillus plantarum,CGMCC No.6016;所述植物乳杆菌发酵谷物或谷物胚芽提取物的制备方法;以及乳酸菌发酵谷物或谷物胚芽提取物的用途。

Description

乳酸菌及发酵谷物或谷物胚芽提取物的制备方法与用途
技术领域
本发明涉及食品生物技术领域, 特指以谷物或谷物胚芽 (大麦、 小麦胚芽等) 为原料, 通过乳酸菌发酵发生的生物转化, 实现功能活性组分的增加与富集, 制备具有抑制肿瘤细胞 增殖和肿瘤生长的发酵提取物, 该发明产品可用于功能性食品、 食品配料或药物的制备。 背景技术
世界卫生组织指出, 目前全球因恶性肿瘤导致死亡的人数每年达 700多万, 且数量仍在 不断攀升。 而对于癌症的治疗主要有手术、 化疗、 放疗及靶向疗法 (免疫疗法、 基因疗法、 血管生成抑制剂及定向疗法) 等方式, 其副作用仍会给患者带来许多痛苦。 因此, 开发天然 安全、 无毒副作用的抗肿瘤活性物质及其功能食品或药物是癌症患者的渴求。
天然谷物或谷物胚芽中富含多种功能性物质, 如蛋白质、 黄酮类、 多酚类等, 具有一定 的抗氧化、 抗肿瘤等特性。 但是由于其中功能成分含量或活性较低, 难以达到明显的效果。 因此, 采用生物转化技术提高以谷物或谷物胚芽的营养品质和功能特性, 引起国内外研究者 的关注, 并取得了一定的成果。
匈牙利专利(99/08694)公开了一种以 2,6-二甲氧基对苯醌为活性物质的检测方法及其抗 肿瘤产品(AVemar)。 该方法是将麦胚粉碎, 用商用面包酵母发酵, 将上清液进行冷冻干燥或 喷雾干燥, 将其干燥粉配制成一定浓度的水溶液加入到肿瘤细胞中, 能够抑制肿瘤细胞的代 谢和转移; 以氯仿或乙醇提取其中的 2,6-二甲氧基对苯醌为标志物, 采用 HPLC进行定量, 但未对提取物的其它成分进行分析。 美国专利(2010/135580A2)与匈牙利专利相似, 其不同 之处是采用乙醇提取并通过分子筛和电泳等方法从 Avemar 中获得多肽, 其相对分子质量在 5〜100 KD之间, 并通过细胞和动物模型试验证明该范围的多肽具有抑制肿瘤细胞的生长。
日本专利 (200510069392.8 ) 公开了一种抗肿瘤制剂的制备方法。 该方法是将小麦胚芽、 大豆胚芽及米胚芽等以一定的比例混合, 将混合物用 110°C热蒸汽加热, 并将蒸汽加热产物 在 30°C下用曲类 (小麦曲霉) 等发酵 48h, 所得的发酵提取物具有抗肿瘤效果, 其抑制率在 5%〜15%, 该专利未对发酵提取物中的抗肿瘤成分进行分析。
日本崇城大学 Kouta Funamoto, et al.在 2008年研究得出大麦烧酒的蒸馏残余物具有抗肿 瘤和免疫活性, 在体外能显著抑制人肺癌细胞的生长, 诱导肿瘤细胞凋亡, 在体内诱导能正 常老鼠血清干扰素 (IFN-γ) 的产生, 增加自然杀伤细胞 (NK) 的数量, 且通过尾静脉注射, 无急性毒性。 Masa iro Ohgidani, et al.在 2012年研究得出 SCID鼠注射 HepG2肝癌细胞后, 每天口服大麦烧酒的蒸馏残余物 2250 mg/kg体重, 连续 21天, 能显著减少肿瘤细胞, 诱导 肿瘤细胞凋亡, 延长 SCID鼠的寿命, 且未见副作用。 ¥ 利和文献报道关于发酵产物的抗肿瘤研究, 主要 , 且其 对肿瘤的抑制效果尚未达到令人满意的程度。
乳酸菌 (lactic acid bacterium, LAB ) 安全无毒、 无致病性, 并具有独特的益生特性, 是全球公认的 " GRAS " ( generally regarded as safe) 等级食品微生物, 普遍应用于酸乳制品、 泡菜、 发酵肉制品、 益生饮料等发酵食品中。 但是, 关于其乳酸菌发酵产物抗肿瘤特性的研 究及产品开发尚未见有专利或其他文献报道。 基于此, 筛选能发酵谷物及谷物胚芽并获得具 有高生物活性产物的乳酸菌, 并确证其发酵产物的抗肿瘤功能, 从而制备出高效抗肿瘤功能 食品、 食品配料或药物, 是一个具有广阔的开发前景的研究领域。
本发明从自行分离的乳酸菌或商用乳酸菌中筛选出优良的出发菌株, 优化发酵条件, 建 立发酵提取物产量高且抗肿瘤活性强的发酵工艺, 并采用该提取物进行多种人源肿瘤细胞及 其荷瘤动物试验, 确证其提取物具有显著的抑制肿瘤细胞增殖功能。
发明内容
本发明首先提供的是源自自然发酵泡菜, 通过筛选、 分离、 富集以及理化分析等, 从中 获得一株性能优良的乳酸菌; 再以谷物或谷物胚芽 (大麦、 小麦胚芽等) 为原料, 通过该乳 酸菌的直投式发酵, 从中获得具有抑制肿瘤细胞增殖活性的发酵提取物, 并对该提取物进行 分离纯化与分析。
采用 MTT、细胞凋亡和细胞周期法研究其组分的体外抗肿瘤功能;采用荷瘤裸鼠模型(人 源肿瘤细胞) 研究该提取物的体内抗肿瘤活性; 综合评价本发明发酵提取物的抗肿瘤功能并 探索其作用途径。
本发明通过以下技术方案实现:
1、乳酸菌 Dy- 1,其建议的分类名称为植物乳杆菌, Lactobacillus plantarum;该菌株于 2012 年 4月 18日送交位于中国北京市朝阳区北辰西路 1号院 3号的中国科学院微生物研究所的中 国微生物菌种保藏管理委员会普通微生物中心保藏, 保藏编号为 CGMCC No.6016。
2、 乳酸菌发酵谷物或谷物胚芽提取物的制备方法
( 1)菌种的筛选与制备: 将泡菜样品分别进行适当的梯度稀释, 涂布于 MRS双层平板 上,恒温箱中于 30°C培养 36h,待菌落长出来后观察其生长情况,选择菌落合适(30~300个)、 溶钙圈明显并便于挑取菌落的平板, 记录菌落特征, 选择和挑取菌落。 从泡菜中筛选出 1 株 乳酸菌鉴定其功能特性, 其建议的分类名
Figure imgf000004_0001
plontorum ; 该菌株于 2012年 4月 18日送交位于中国北京市朝阳区北辰西路 1号院 3号的中国科学院微生物研究所 的中国微生物菌种保藏管理委员会普通微生物中心保藏, 保藏编号为 CGMCC No.6016; 或选 择商用优良乳酸菌,如植物乳杆菌(Lactobacillus plantarum)、短乳杆菌(Lactobacillus brevis)、 嗜酸乳杆菌 (Lactobacillus acidophilus )、 干酪乳杆菌 (Lactobacillus case) 中的一种或几种。
(2)乳酸菌发酵谷物或谷物胚芽及其发酵提取物的制备:称取筛分除杂后的谷物或谷物 胚芽, 粉碎过 30〜140目筛, 置于锥形瓶中, 按照质量与体积比 1:6~1: 15比例, 优选 1:7的 比例加入蒸馏水, 再加入乳酸菌到谷物或谷物胚芽中, 其中乳酸菌占新鲜谷物或谷物胚芽粉 的质量为 2~8%, 混合均匀; 将锥形瓶用纱布封口, 置于恒温培养箱中, 在 20〜40°C下发酵 12〜72h,其中优选发酵温度 30〜35°C,发酵 24〜48 h后,发酵物在室温下 3000〜12000g/min 离心 10〜40min, 其中优选 5000〜6500g/min离心 20〜30min; 收集上清液, 并将其进行热风 干燥、 喷雾干燥或冷冻干燥, 优选冷冻干燥, 从而获得发酵谷物或谷物胚芽发酵提取物。
(3)乳酸菌发酵谷物或谷物胚芽提取物的分离纯化: 采用硫酸铵沉淀、 高效液相(流动 相是甲醇与水的比例按照 20%〜15%, 流速为 lm!Jmin, 柱温为 25°C, 检测波长为 288nm。)、 凝胶过滤层析 (SephadexG-50禾 P SurpedexS-200)、 SDS-PAGE ( 5%的浓缩胶, 10%〜 12%的 分离胶) 对发酵谷物或谷物胚芽提取物进行分离纯化, 即可得到乳酸菌发酵谷物或谷物胚芽 提取物中的蛋白或多肽。
其中步骤 (1 ) 中选用的乳酸菌采用 MRS液体培养基活化和高密度培养后, 添加保护剂 (以质量比计 20%脱脂乳、 10%海藻糖、 14%谷氨酸钠、 6%山梨醇和 6%Vc, 或者 22%菊粉、 12%谷氨酸钠、 5%山梨醇) 后采用真空冷冻干燥法制备可直接使用的乳酸菌 Dy-1发酵剂, 分 装于无菌真空包装袋中密封保藏待用。
其中所述的谷物优选大麦或者薏米、 荞麦。 其中所述的谷物胚芽优选小麦胚芽或者大豆 胚芽。
乳酸菌发酵谷物或谷物胚芽提取物的用途, 可以用于制备抗肿瘤的功能性食品或药物开 发。
具有抗肿瘤功能食品的制备方法, 按照下述步骤进行:
将本发明的发酵谷物或谷物胚芽提取物以一定的比例加入到发酵乳制品以及其他酸性饮 料中, 制成功能性饮料; 也可将其作为食品配料加入面包、 面条、 香肠以及饼干等食品中; 分离纯化的活性部分直接作为功能食品或进行抗肿瘤药物开发。
将本发明的发酵谷物或谷物胚芽提取物加入到食品中并无特别的重量要求, 加入量以质 量比计一般为 1%〜15%,优选 4%〜10%;其提取物也可以直接或经过分离纯化后直接作为食 品或药品。
本发明的优点:
( 1 )本发明利用自主分离的乳酸菌发酵谷物或谷物胚芽, 制备具有抗肿瘤功能的发酵提 取物, 具有自主知识产权。
(2) 本发明对谷物或谷物胚芽进行简单预处理 (非高温加热), 生产成本低, 采用直投 式发酵, 方便快捷, 安全稳定, 便于质控。
(3 )本发明以谷物或谷物胚芽为原料, 来源广、 蕴藏量大, 通过对其进行生物转化, 显 著提升谷物或谷物胚芽的生物功能和营养品质, 引导企业应用现代生物技术生产健康、 高值 化产品。
(4)本发明对提取物中抗肿瘤功活性成分进行了研究, 明确了 40KD以下相对分子质量 的蛋白或多肽具有显著的抗肿瘤功效, 说明乳酸菌发酵过程中蛋白质大分子的适度降解是产 生抗肿瘤活性的重要途径, 同时也为分离纯化后的食品或药品的开发提供了理论依据。 附图说明
图 1 LFWGE对结肠癌 HT-29细胞的生长抑制率
图 2细胞凋亡图谱
图 3 LFWGE对结肠癌 HT-29细胞周期的影响
图 4 FBE对结肠癌 HT-29细胞的生长抑制率
图 5 LFWGE水溶性蛋白 SDS-PAGE图谱
图 6凝胶过滤层析多肽图谱
图 7 FBE中蛋白粗提物和多酚粗提取对 HT-29细胞增殖抑制率
图 8 LFWGE对荷瘤裸鼠瘤体积的影响
图 9 LFWGE对荷瘤裸鼠肿瘤的抑制率
图 10 LFWGE对荷瘤裸鼠血清中肿瘤坏死因子 -α含量的影响
图 11 LFWGE对荷瘤裸鼠血清中干扰素 -γ含量的影响
图 12 LFWGE对荷瘤裸鼠血清中白细胞介素 -4含量的影响
图 13 LFWGE对 HT-29细胞 CyclinDl、 Bax和 Bcl-2蛋白表达的影响
图 14 LFWGE对 HT-29细胞 Caspase-3蛋白表达的影响
图 15 FBE对荷瘤裸鼠瘤体积的影响
图 16 FBE对荷瘤裸鼠肿瘤的抑制率
图 17 FBE对荷瘤裸鼠肝脏中丙二醛含量的影响
图 18 FBE对荷瘤鼠肝脏中总超氧化物歧化酶活力的影响
图 19 FBE对荷瘤鼠肝脏中谷胱甘肽过氧化物酶活力的影响
图 20 FBE对荷瘤裸鼠血清中干扰素 -γ的含量的影响
图 21 FBE对荷瘤裸鼠血清中白细胞介素 -4含量的影响 图 22 FBE对荷瘤裸鼠血清中肿瘤坏死因子 -α含量的影响
具体实施方式
下面结合实施例对本发明做进一步阐述。
1.乳酸菌的筛选过程
( 1)菌株初筛
首先将采集到的泡菜样品进行适当的梯度稀释, 涂布于 MRS 双层平板法, 恒温箱中于 30°C培养 36h,待菌落长出来后进行观察,观察平板的生长情况,选择平板中菌落合适(30~300 个) 和溶钙圈明显的便于挑取菌落的平板, 记录菌落特征, 选择菌落, 挑取菌落。
再将分离得到的菌株进行多次划线或涂布分离, 以获得纯菌株。 从穿剌保存中挑取少量 菌, 进行革兰氏染色, 通过显微镜观察, 对染色结果进行记录, 检査分得菌株是否是纯菌株, 同时通过对菌株的形状进行观察, 测定细菌大小, 进行初步鉴定。 对不纯的菌再次富集和分 离, 方法同上。
(2)菌株复筛
通过产酸产气试验对分得菌株的产酸能力进行比较, 以获得产酸量高的菌株; 同时通过 观察同时产酸和产气的菌株, 以获得潜在的兼性厌氧乳酸菌。
根据记录的菌落情况, 选择纯的杆状或链状的革兰氏阳性菌, 在糖发酵产酸培养基进行 产酸产气试验, 接种后恒温箱内 25°C恒温培养 48h, 用 pH计测定其 pH值。
2.菌种鉴定
( 1 )形态学观察
从自然发酵的甘蓝泡菜中分离出三株产酸量最大的菌株, 在固体培养基上呈现出白色菌 落凸起、 圆形、 边缘整齐、 表面光滑的特征; 在液体培养基中兼性厌氧, 生长到一定数量呈 混浊状; 革兰氏染色观察 (见表 1 )均为氏阳性, 菌体圆端直杆状, 宽 0.8~1.2μηι, 长 1~2μηι 单个或成对排列, 不形成内生芽孢。
(2)生理生化试验
对上述三株菌株进行生理生化试验 (见表 2) 结果表明, 三株菌的精氨酸产氨试验、 产 硫化氢试验、 过氧化氢酶试验、 明胶液化试验、 硝酸盐还原试验和吲哚试验均为阴性; 乳酸 定性试验显示, 均产生乳酸; 在糖发酵试验中 (见表 3 ) 不发酵鼠李糖, 部分弱发酵阿拉伯 糖和松三糖, 其余的糖醇均能发酵, 均不产气。 生理生化试验鉴定该三株菌都是植物乳杆菌 (Lactobacillus Plantarum)。 但仍有必要选择发酵性能较好的 Dy-1进行 16s rDNA扩增进行 进一步的鉴定。 (3) 16s rDNA PCR扩增产物序列
挑取 Dy-1菌适量,加入 MRS培养基中, 37°C培养过夜,取 ImL菌液, 5000xg离心 5min, 弃去上清液后加入 300μί细胞裂解液和 50μί蛋白酶 Κ, 90 °C水浴裂解 lOmin后, 12000xg 离心 lOmin取上清液, 以 v3通用引物进行 PCR反应。
PCR产物纯化后交由上海生工测序, 序列如下:
Figure imgf000008_0001
CAAGAGCCTGTCAGC 通过在 Genbank中 Blast分析结果可知, Dy- 1 的 16S rRNA基因序列与 Lactobacillus plantar um strain L3的 16S rRN A基因序列只有 3个碱基的差异, 其相似性达 99%以上, 应属 于同一种, 即 Lactobacillus plantarum。 该菌株于 2012年 4月 18日送交位于中国北京市朝阳 区北辰西路 1号院 3号的中国科学院微生物研究所的中国微生物菌种保藏管理委员会普通微 生物中心保藏,保藏编号为 CGMCC No.6016,其建议的分类名称为植物乳杆菌, Lactobacillus plantar 称其为乳酸菌 Dy- 1
3. 抗肿瘤功能试验
体外抗肿瘤功能: 将本发明的发酵谷物或谷物胚芽提取物以 0.125 4mg/mL的浓度加入 到人的 HT-29结肠癌细胞中, 培养一段时间 (如 48h) 后, 观察评价其抗肿瘤效果。 其方法 如下-
①细胞增殖试验: 采用 MTT法。
②细胞凋亡与细胞周期试验: 采用流式细胞仪进行分析。
与未加本发明发酵谷物或谷物胚芽提取物的对照相比较, 肿瘤活细胞数可降至 50%或以 下, 最优的可使活细胞数降至 10%或以下; 其肿瘤凋亡率可达 50%或以上, 最高可达 90%或 以上。
体内抗肿瘤功能:将 4 6周龄的 BALB/c 裸鼠的腹部皮下接种人结肠癌 HT-29细胞(接 种量: 1 106 2 107细胞/裸鼠), 2 15天后肉眼可见裸鼠接种部位有肿瘤长出后开始灌胃; 将荷瘤裸鼠随机分成 5组, 即阴性对照组、 5-FU阳性对照组、 高剂量组、 低剂量组和高剂量 组 +5-FU组, 每组 10 12只裸鼠, 连续灌胃 14 50天; 每日测定瘤体积, 绘制肿瘤生长曲 线, 根据肿瘤重量计算抑瘤率; 在试验末期测定荷瘤裸鼠血清中干扰素 (IFN-Y)、 白介素 -4 ( IL-4) 和肿瘤坏死因子 (TNF-a)的浓度。 结果表明, 与阴性对照组相比较, 灌胃发酵谷物或 谷物胚芽提取物组的抑瘤率可达 30% 60%
实施例 1
称取粉碎的新鲜小麦胚芽(以下简称麦胚)粉 20.0g于 500mL锥形瓶中,向其中加入 100ml 的蒸馏水, 再加入 0.4g的乳酸菌 Dy-1发酵剂, 混合均匀; 将锥形瓶用纱布封口, 置于恒温 培养箱中在 30°C下发酵 24h后, 将其在 6500g/min下离心 20min收集上清液进行冷冻干燥。
称取 0.5g的冻干粉 (LFWGE) 溶于 50ml的去离子水中, 过 0.22um的滤膜, 将滤液按 照 0.125 mg/mL 0.25mg/mL 0.5 mg/mL 1.0 mg/mL 2.0 mg/mK 4.0 mg/ml分别加入到 HT-29 结肠癌细胞中, 培养细胞 24h 48h 72h, 并分别通过 MTT法测定 LFWGE对结肠癌 HT-29 细胞的抑制率 (图 1 )。 结果表明, 提取物浓度与肿瘤细胞增殖抑制率呈正相关, 最大抑制率 达到 94.2% 将 1.0mg/mL的 LFWGE加入到结肠癌细胞中, 培养细胞 48h后, 收集细胞, 流式细胞仪 检测细胞凋亡(图 2)。结果表明, 早期凋亡是 66.5% (图 2, 右下角), 晚期凋亡是 27.6% (图 2, 右上角)。 将 0.2mg/mL、 0.4 mg/mL、 0.8mg/mL的 LFWGE加入到结肠癌 HT-29细胞中, 培养细胞 48h后, 收集细胞, 流式细胞仪检测细胞周期(图 3 )。 结果表明, 随着浓度的增加, 01期也随之延长, 而 S期则随之缩短, 说明 LFWGE能有效阻滞细胞的 期。
实施例 2
取实施例 1中的滤液同样以 0.125 mg/mL、 0. 25mg/ml、 0. 5 mg/mK 1.0 mg/mK 2.0 mg/mK 4.0 mg/ml分别加入到 SGC-7901胃癌细胞中, 培养细胞 24h、 48h、 72h, 并分别通过 MTT法 测定 LFWGE对胃癌 SGC-7901细胞的抑制率。 结果表明, 提取物浓度与肿瘤细胞增殖抑制 率呈正相关, 最大抑制率达到 89.6%。
将 lmg/ml的 LFWGE加入到 SGC-7901胃癌细胞中, 培养细胞 48h后, 收集细胞, 流式 细胞仪检测细胞的凋亡。 早期凋亡是 48.5%, 晚期凋亡是 22.4%。 将 0.2mg/ml、 0.4 mg/ml、 0.8mg/ml的 LFWGE加入到胃癌细胞中, 培养细胞 48h后, 收集细胞, 流式细胞仪检测细胞 周期。 结果表明, 随着浓度的增加, 01期也随之延长, 而 S期则随之缩短, 说明 LFWGE能 有效阻滞细胞的01期。
实施例 3
称取粉碎过 60目筛的大麦粉 20.0g于 500mL锥形瓶中, 向其中加入 1:6比例的水混合均 匀,可用 0.015%的 β-葡聚糖酶 40°C水解 30min或不水解,加入 4%乳酸菌 Dy-1发酵剂在 30°C 下发酵 48h, 发酵完成后将发酵产物在室温下 5000g/min离心 20min, 收集上清液, 并将其进 行冷冻干燥 24h, 从而获得发酵大麦提取物 (FBE)。
称取 0.5g的 FBE溶于 50ml的去离子水中,过 0.22um的滤膜,将滤液按照 0.125 mg/mL 、 0.25mg/mL、 0.5 mg/mL、 1.0 mg/mL、 2.0 mg/ml、 4.0 mg/ml分别加入到 HT-29肿瘤细胞中, 培养细胞 24h、 48h、 72h, 并分别通过 MTT法测定 FBE对结肠癌 HT-29细胞的抑制率。 结 果表明, 提取物浓度与肿瘤细胞增殖抑制率呈正相关, 最大抑制率达到 95.6% (图 4)。
实施例 4
100g粉碎的新鲜麦胚加入 1L的蒸馏水和 4g的乳酸菌 Dy-1发酵剂混合均匀, 混合物在 250rpm的转速下 30°C发酵 48h。 所得发酵产物进行 6000g离心 15min, 上清液被收集并进行 冷冻干燥,获得 LFWGE冻干粉。利用 SDS-PAGE检测 LFWGE中水溶性蛋白的分布(图 5)。 为了分离 LFWGE中蛋白成分, 采用 (NH4)2S04沉淀法将 LFWGE水溶液中的蛋白沉淀析出, 沉淀溶解在 PBS中, 并将所得的溶液通过 SephadexG-50和 SurpedexS-200凝胶过滤层析, 分 别收集峰 1和峰 2两个部分 (图 6), 并将其分别冷冻干燥。 采用 MTT法分别测定了峰 1和 峰 2组分对 HT-29细胞的抑制率。 结果表明, 峰 1对 HT-29细胞具有显著的抑制率, 最大可 达到 88.6% (表 3 )。
实施例 5
100g粉碎的新鲜大麦加入 1L的蒸馏水和 4g的乳酸菌 Dy-1发酵剂混合均匀, 混合物在 250rpm的转速下, 30°C发酵 24h。 所得发酵产物进行 5000g离心 15min, 上清液被收集并进 行冷冻干燥, 获得发酵大麦提取物 (FBE)冻干粉。 溶解 FBE, 并用 90%饱和度的 (NH4)2S04 沉淀蛋白, 6000g/min离心 15min, 取沉淀用蒸馏水溶解后用分子量 8000-14000Da的透析袋 透析 3次, 冻干后得蛋白粗提物。 称 lg FBE, 用 70%乙醇料液比 1 : 60, 60°C回流浸提 lh, 提取 2次, 4500g/min离心 15min得滤液, 经旋转蒸发得浓缩液, 冷冻干燥, 得多酚粗提物。 将 500ug/mL的蛋白粗提物与多酚粗提物加入到 HT-29肿瘤细胞中, 培养细胞 24h后, 并通 过 MTT法测定蛋白粗提物与多酚粗提物对结肠癌 HT-29细胞的抑制率。 结果表明, 蛋白粗 提物和多酚粗提物与肿瘤细胞增殖抑制率呈正相关 (图 7)。
实施例 ό
将上述制备的 LFWGE溶解于生理盐水中, 制备成浓度为 0.2g/ml和 0.1g/ml水溶液, 并 通过无菌膜处理备用。人 HT-29结肠癌细胞接种到 4-6周龄的 BALB/c裸鼠腹部皮下, 2天后 采用 2g/kg/d、 lg/kg/d、 2g/kg/d+5-FU (25 mg/kg/d, i.p, 7天) 剂量的 LFWGE给荷瘤裸鼠灌 胃, 连续灌胃 30天, 同时与灌胃相同剂量的生理盐水组和腹腔注射 5-FU组(25 mg/kg/d, i.p, 7天)进行比较, 通过测定瘤体积的变化和最后的抑瘤率来确定 LFWGE的抗肿瘤效果(图 8 和图 9 )。结果表明, 2g/kg/d、 lg/kg/d、 2g/kg/d+5-FU LFWGE剂量组的抑瘤率分别达到 49.37%、 40.7%、 47.8%。
用酶联免疫试剂盒测定荷瘤裸鼠血清中肿瘤坏死因子(TNF-a)、 干扰素(IFN-γ)及白细 胞介素 -4 (IL-4) 的含量。 结果表明, LFWGE使荷瘤裸鼠血清中 IFN 、 IL-4以及 TNF-α的 含量显著增加 (图 10、 图 11和图 12), 与其对 HT-29结肠癌细胞产生抑制作用有关。
用免疫印迹测定荷瘤裸鼠肿瘤组织中相关因子的表达, 发现 LFWGE 可下调 Bcl-2、 CyclinDl的 mRNA及蛋白表达; 上调 Bax和 Caspase-3的 mRNA及蛋白表达(图 13,14), 从 而诱导荷瘤裸鼠肿瘤细胞的凋亡。
实施例 7
将上述制备的 FBE溶解于生理盐水中, 制备成浓度为 0.2g/ml和 0.1g/ml, 并且通过无菌 膜处理备用。 将人的 HT-29结肠癌细胞接种到 4-6周龄的 BALB/c裸鼠腹部皮下, 2天后采用 2g/kg/d、 lg/kg/d、 2g/kg/d+5-FU (25 mg/kg/d, i.p, 7天) 剂量的 FBE给荷瘤裸鼠灌胃, 连续 灌胃 30天, 同时与灌胃相同剂量的生理盐水组和腹腔注射 5-FU组 (25 mg/kg/d, 7天) 作比 较,通过用游标卡尺测量的移植瘤体积和最后的抑瘤率来确证 FBE的抗肿瘤作用(图 15,16)。 结果表明, 2g/kg/d+5-FU混合剂量组的抑瘤率可达到 53.36%。
用试剂盒测定荷瘤裸鼠肝脏中超氧化物歧化酶 (SOD) (图 17)、 谷胱甘肽 -过氧化物酶 (GSH-PX)(图 18)和丙二醛(MDA)的含量(图 19)。结果表明 FBE可以增加 SOD和 GSH-PX 的酶活, 降低 MDA的含量。
用酶联免疫试剂盒测定荷瘤裸鼠血清中干扰素 (IFN-γ) ((图 20)、 白介素 -4 (图 21) 和 肿瘤坏死因子 (TNF-α) (图 22) 的浓度。 结果表明, FBE可以同时增加 IFN-Y、 白介素 -4以及 TNF-α的含量。
表 1 筛选获得产酸量最高菌株的形态学特征
代号 pH值 滴定酸度 (%) 特征 细菌大小 (μηι) 纯否
3.70 0.528 杆状 0.8X1.1 纯
3.70 0.528 杆状 0.8X1.2 纯
3.69 0.528 杆状 0.8X1.0 纯
表 2 分离出的菌株的生理生化试验结果
代号 精氨酸产氨试验 产硫化氢 过氧化氢酶 明胶液化 硝酸盐还原 吲哚试验
试验 试验 试验 试验
DY-1
s3 注: +代表阳性, 一代表阴性
表 3 LFWGE中两部分多肽对 HT-29细胞增殖抑制率 样品 浓度 ( g/mL) 吸光度 (A490) 抑制率 (%)
200 0.100±0.012 88.6
100 0.381 ±0.021 56.8
pe kl 50 0.432±0.015 51.0
25 0.631 ±0.024 28.4 200 0.873 ± 0.052 0.9
100 0.861 + 0.073 23
50 0.892±0.017 -1.2
25 0.871 ±0.013 1.1
SEQUENCE LISTING
<110> 江苏大学
<120> 乳酸菌及发酵谷物或谷物胚芽提取物的制备方法与用途
<160> 1
<170> Patentln version 3.3
Figure imgf000014_0001
请按照 "注意事项"正确填写本表各栏 第②和第④栏未确定的由专利局填写 来源
发明名称 乳酸菌及发酵谷物或谷物胚芽提取物的制备 ① 申请号
方法与用途
方方式式
② 申请人 江苏大学 ③ 申请日
④ 遗传资源名称: 植物乳杆菌 Lactobacillus plantarum
⑥遗传资源的获取途径
I 遗传资源取自: □动物 □植物 微生物 口人
II 获取方式: □购买 □赠送或交换 口保藏机构 □种子库 (种质库) 口基因文库 図自行采 集 □委托采集 □其他
⑧获取时间 2012年 2 月
⑨提供者名称
(姓名)
⑩提供者所处
国家或地区
Θ提供者联系
方式
©采集地 (国
中国 江苏省 镇江市 江苏大学
家、 省 (市))
Θ采集者名称
(姓名)
Θ采集者联系
13505280069
方式
© 采集者名
称 (姓名)
© 采集者联
13505280069
系方式
©原始来源
(@获取时间 2012年 2 月
©获取地点
( 国家、 省 中国 江苏省 镇江市 江苏大学校园内实验室 (市))
©无法说明遗传资源原始来源的理由:
@全体申请人或专利代理机构签字或者盖章 ©专利局处理意见
2013年 6月 5日 年 月 日

Claims

权 利 要 求 书 WO 2014/206279 PCT/CN2014/080665
1、 乳酸菌 Dy-1, 其建议的分类名称为植物乳杆菌, Lactobacillus plantarum; 保藏编号为 CGMCC No.6016。
2、 乳酸菌发酵谷物或谷物胚芽提取物的制备方法, 其特征在于按照下述步骤进行:
( 1)菌种的选择: 选择植物乳杆菌 ·σ<:ί:ο/5σ(:/7/υ5 ρ/σηί:σ ·υΜ, CGMCC No.6016; 或选择商 用优良乳酸菌, 如植物乳杆菌 (Lactobacillus plantarum)、 短乳杆菌 (Lactobacillus brevis)、 嗜酸乳杆菌 (Lactobacillus acidophilus )、 干酪乳杆菌 (Lactobacillus case) 中的一种或几种为 出发菌株;
(2)乳酸菌发酵谷物或谷物胚芽及其发酵提取物的制备:称取筛分除杂后的谷物或谷物 胚芽, 粉碎过 30〜140目筛, 置于锥形瓶中, 按照质量与体积比 1:6~1: 15比例, 优选 1:7的 比例加入蒸馏水, 再加入乳酸菌 Dy-1发酵剂到谷物或谷物胚芽中, 其中乳酸菌 Dy-1发酵剂 占新鲜谷物或谷物胚芽粉的质量为 2~8%, 混合均匀; 将锥形瓶用纱布封口, 置于恒温培养箱 中, 在 20〜40°C下发酵 12〜72h, 其中优选发酵温度 30〜35°C, 发酵 24〜48 h后, 发酵物在 室温下 3000〜12000g/min离心 10〜40min, 其中优选 5000〜6500g/min离心 20〜30min; 收 集上清液, 并将其进行热风干燥、 喷雾干燥或冷冻干燥, 优选冷冻干燥, 从而获得发酵谷物 或谷物胚芽的提取物;
(3)乳酸菌发酵谷物或谷物胚芽提取物的分离纯化: 采用硫酸铵沉淀、 高效液相(流动 相是甲醇与水的比例按照 20%〜15%, 流速为 lm!Jmin, 柱温为 25°C, 检测波长为 288nm。)、 凝胶过滤层析 (SephadexG-50禾 P SurpedexS-200)、 SDS-PAGE ( 5%的浓缩胶, 10%〜 12%的 分离胶) 对发酵谷物或谷物胚芽提取物进行分离纯化, 即可得到乳酸菌发酵谷物或谷物胚芽 提取物中的蛋白或多肽。
3、 根据权利要求 1所述的乳酸菌发酵谷物或谷物胚芽提取物的制备方法, 其特征在于其 中步骤 (1 ) 中选用的乳酸菌采用 MRS液体培养基活化和高密度培养后, 添加保护剂, 以质 量比为: 20%脱脂乳、 10%海藻糖、 14%谷氨酸钠、 6%山梨醇和 6%Vc,或者以质量比计为 22% 菊粉、 12%谷氨酸钠和 5%山梨醇后采用真空冷冻干燥法制备可直接使用的乳酸菌 Dy-1发酵 剂, 分装于无菌真空包装袋中密封保藏待用。
4、 根据权利要求 1所述的乳酸菌发酵谷物或谷物胚芽提取物的制备方法, 其特征在于其 中所述的谷物为大麦或者薏米、 荞麦; 其中所述的谷物胚芽为小麦胚芽或者大豆胚芽。
5、 乳酸菌发酵谷物或谷物胚芽提取物的用途, 可以用于制备抗肿瘤的功能性食品。
6、 根据权利要求 5所述的乳酸菌发酵谷物或谷物胚芽提取物的用途, 其特征在于具有抗 肿瘤功能食品的制备方法, 按照下述步骤进行: 将发酵谷物或谷物胚芽提取物以一定的比例 直接加入到发酵乳制品以及其他酸性饮料中, 制成功能性饮料; 也可将其作为食品配料加入 权 利 要 求 书
WO 2014/206279 PCT/CN2014/080665 面包、 面条、 香肠以及饼干等食品中; 发酵谷物或谷物胚芽提取物也可直接作为食品; 分离 纯化的活性部分可作为功能性食品或进行抗肿瘤药物开发; 将发酵谷物或谷物胚芽提取物加 入到食品中并无特别的重量要求, 加入量以质量比计一般为 1%〜15%, 优选 4%〜10%。
PCT/CN2014/080665 2013-06-26 2014-06-24 乳酸菌及发酵谷物或谷物胚芽提取物的制备方法与用途 Ceased WO2014206279A1 (zh)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201310259726.2 2013-06-26
CN201310261606.6A CN103468600B (zh) 2013-06-26 2013-06-26 一种发酵谷物的乳酸菌及其用途
CN201310261606.6 2013-06-26
CN201310264094.9A CN103445068B (zh) 2013-06-26 2013-06-26 乳酸菌发酵大麦提取物的制备方法及其抗肿瘤作用
CN201310259726.2A CN103461858B (zh) 2013-06-26 2013-06-26 乳酸菌发酵麦胚提取物的制备方法及其抗肿瘤作用
CN201310264094.9 2013-06-26

Publications (1)

Publication Number Publication Date
WO2014206279A1 true WO2014206279A1 (zh) 2014-12-31

Family

ID=52141065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/080665 Ceased WO2014206279A1 (zh) 2013-06-26 2014-06-24 乳酸菌及发酵谷物或谷物胚芽提取物的制备方法与用途

Country Status (1)

Country Link
WO (1) WO2014206279A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109234179A (zh) * 2018-10-29 2019-01-18 贵州茅台酒股份有限公司 一种酒醅中酵母菌分离培养基及其制备方法
CN116218738A (zh) * 2023-03-28 2023-06-06 西北大学 一种用于谷物发酵生产降压肽的弗拉特氏菌菌株及其应用
CN116998663A (zh) * 2023-08-03 2023-11-07 贵州大学 一种葛根薏仁米发酵液面条及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1709409A (zh) * 2004-06-18 2005-12-21 欧德有限公司 抗肿瘤试剂及其制备方法以及含有该试剂的饮料和食品
US20120121612A1 (en) * 2009-05-20 2012-05-17 United States Government As The Represented By The Fermented wheat germ proteins (fwgp) for the treatment of cancer
CN102613518A (zh) * 2012-03-30 2012-08-01 江苏大学 直投式短乳杆菌发酵剂生产菊芋泡菜及工艺
CN103461858A (zh) * 2013-06-26 2013-12-25 江苏大学 乳酸菌发酵麦胚提取物的制备方法及其抗肿瘤作用

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1709409A (zh) * 2004-06-18 2005-12-21 欧德有限公司 抗肿瘤试剂及其制备方法以及含有该试剂的饮料和食品
US20120121612A1 (en) * 2009-05-20 2012-05-17 United States Government As The Represented By The Fermented wheat germ proteins (fwgp) for the treatment of cancer
CN102613518A (zh) * 2012-03-30 2012-08-01 江苏大学 直投式短乳杆菌发酵剂生产菊芋泡菜及工艺
CN103461858A (zh) * 2013-06-26 2013-12-25 江苏大学 乳酸菌发酵麦胚提取物的制备方法及其抗肿瘤作用

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109234179A (zh) * 2018-10-29 2019-01-18 贵州茅台酒股份有限公司 一种酒醅中酵母菌分离培养基及其制备方法
CN116218738A (zh) * 2023-03-28 2023-06-06 西北大学 一种用于谷物发酵生产降压肽的弗拉特氏菌菌株及其应用
CN116998663A (zh) * 2023-08-03 2023-11-07 贵州大学 一种葛根薏仁米发酵液面条及其制备方法

Similar Documents

Publication Publication Date Title
CN116445356B (zh) 一种调节肠道菌群及增强免疫力的动物双歧杆菌乳亚种ba67及其应用
CN112662581B (zh) 一株产具有抗肿瘤和降糖降脂活性的胞外多糖的嗜酸乳杆菌及其应用
CN114774315B (zh) 鼠李糖乳杆菌菌株LRa05在制备增强免疫力制品和/或缓解湿疹制品方面的用途
CN105441357A (zh) 一株产抗肿瘤活性胞外多糖的植物乳杆菌
CN117384790B (zh) 一株戊糖片球菌ks5及其在制备助睡眠药品中的应用
KR101295444B1 (ko) 신규한 홍삼 발효용 미생물, 이를 이용한 홍삼 발효액 및 홍삼 발효 음료
CN103445068B (zh) 乳酸菌发酵大麦提取物的制备方法及其抗肿瘤作用
CN117286045B (zh) 一株长双歧杆菌长亚种ks2及其在制备抗衰老药品中的应用
CN103356716A (zh) 多株益生菌与复合药食两用真菌发酵组合物及制备和应用
CN110484459B (zh) 一株植物乳杆菌及其应用
CN109259146A (zh) 一株具有抑制脂肪肝病变功效的鼠李糖乳杆菌及其应用
CN103468600B (zh) 一种发酵谷物的乳酸菌及其用途
CN116574634B (zh) 一株唾液链球菌嗜热亚种jf2及其在制备抗炎和解脂食品药品中的应用
CN116970539B (zh) 一种鼠联合乳杆菌、其组合物及用途
CN116396890A (zh) 用于防治结肠癌的植物乳杆菌zjuids15及其应用
WO2023134203A1 (zh) 脆弱拟杆菌及其两性离子荚膜多糖在制备用于治疗呼吸系统肿瘤药物中的应用
CN113604395A (zh) 一株可发酵石斛且其发酵液可改善皮肤质量的植物乳杆菌
CN114032190B (zh) 一株可发酵石斛且其发酵液可有效修复日光皮炎的罗伊氏乳杆菌
CN118146998B (zh) 一株长双歧杆菌长亚种ks1及其在制备抗衰老和助睡眠药品中的应用
CN103461858B (zh) 乳酸菌发酵麦胚提取物的制备方法及其抗肿瘤作用
JP5740613B2 (ja) 疾患の予防改善剤、持久力向上剤、抗疲労剤、並びにそれらを用いた医薬品および飲食品
CN110295130A (zh) 一株鼠李糖乳杆菌及其应用
WO2014206279A1 (zh) 乳酸菌及发酵谷物或谷物胚芽提取物的制备方法与用途
KR101396842B1 (ko) 오미자 발효물 및 이를 포함하는 항균 및 면역 증강 조성물
KR101965582B1 (ko) 유산균 발효를 이용한 홍삼 유효성분의 체내 흡수 및 혈중 농도 유지시간이 개선된 발효홍삼 농축액 및 그 발효홍삼 농축액을 유효성분으로 함유하는 제품

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14818793

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14818793

Country of ref document: EP

Kind code of ref document: A1