CN102168021B - Diphyllria sinensis L.-derived endophytic fungus Geotrichum candidum and application thereof - Google Patents
Diphyllria sinensis L.-derived endophytic fungus Geotrichum candidum and application thereof Download PDFInfo
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- CN102168021B CN102168021B CN2010106095454A CN201010609545A CN102168021B CN 102168021 B CN102168021 B CN 102168021B CN 2010106095454 A CN2010106095454 A CN 2010106095454A CN 201010609545 A CN201010609545 A CN 201010609545A CN 102168021 B CN102168021 B CN 102168021B
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Abstract
The invention discloses a Diphyllria sinensis L.-derived endophytic fungus Geotrichum candidum and application thereof. The invention provides the Geotrichum candidum WEQC CGMCC NO.3783. The Geotrichum candidum WEQC disclosed by the invention has the physiological characteristic of producing podophyllotoxin glucosides and picropodophyllotoxin di-glucosides, and can be used for preparing podophyllotoxin materials. The method for preparing podophyllotoxin glucosides and picropodophyllotoxin di-glucosides has the advantages of simple fermentation conditions and short production cycle, and can be conveniently used for strain culturing, thereby having application potential in industrial large-scale production. The invention provides a new way for the resource exploitation of podophyllotoxin materials, and is of far reaching importance in protecting the ecological diversity of plants.
Description
Technical field
The present invention relates to endogenetic fungus geotrichum candidum and the application thereof of a strain from the plant Rhizoma et Radix Diphylleiae.
Background technology
Podophyllotoxin (podophyllotoxin) mainly is present in Berberidaceae Podophyllum emodi var chinense genus and the kindred plant thereof; Be one type of natural compounds with extensive BA, have quasi-estrin appearance, estrogen antagonist appearance, anticancer, antiviral, antimycotic, calm, suppress plant-growth and effect such as anti-oxidant.Podophyllotoxin has stronger antitumour activity, and its mechanism of action is the activity of unzipping to stop cell fission and to suppress the DNA topoisomerase that suppresses tubulin.The glycosides derivatives etoposide of podophyllotoxin and the toxicity of teniposide are lower, and kinds of tumors diseases such as small cell lung cancer, lymphatic cancer are all had better curative effect, thereby become the broad-spectrum anti-cancer drug of clinical application.
At present, podophyllotoxin mainly is from wild Podophyllum emodi var chinense class plant rhizome, to extract to obtain, and this type plant only has 4 to belong to 15 kinds in the whole world; China has 3 to belong to 12 kinds; Mainly be grown in high altitude localitiess such as the Qinling Mountains, Tibet, its poor growth, and the content of podophillotoxines material is lower.
Because the podophillotoxines material has broad application prospects at aspects such as medical science and agricultural controls, thereby its demand increases day by day.To a large amount of collections of wild Podophyllum emodi var chinense class plant resources, its resource is seriously damaged, cause the irreversible loss of species diversity and ecotope.What therefore solve the podophillotoxines material comes source problem significant.
Because plant growth environment is complicated, be difficult to simulation, and its growth cycle is long, is difficult to carry out large-scale artificial culture, and tissue culture technique is also inapplicable for Podophyllum emodi var chinense class plant.In addition, podophillotoxines material chemistry complex structure, though chemosynthesis can be carried out, cost is too high.Also can't carry out and make up engineering bacteria because the enzyme quantity of such material of participation formation is too much through the genetic engineering means.So utilize endophyte to have to produce and the character of the same or analogous biologically active substance of host, solve the source problem that comes of podophyllotoxin, possibly be unique also be effective means.
In recent years; Existing scholar utilizes endophyte to have the character of generation and the same or analogous biologically active substance of host; Endophyte to the more distinctive Podophyllum emodi var chinense class plants of China is studied; The existing endophyte that from dysosma veitchii Fu, Chinese unmrellaleaf, is separated to penicillium, its culture have report (preliminary study of the separation of Chinese unmrellaleaf endogenetic fungus and fermentation generation pharmaceutical compound thereof, Liu Shiping, Ceng Songrong, Guo Shiping, Yang Chunyan, the Zhang Lingqi of the Rf value identical with podophyllotoxin through chromatographic analysis; China's medicine and clinical, 2003.3 (3): 227-228; The dysosma veitchii Fu endogenetic fungus produces the preliminary study of the similar thing of podophyllotoxin, Guo Shiping, Jiang Bin, Su Yingzhen, Liu Shiping, Zhang Lingqi, biotechnology, 2004.14 (2): 55-56.).
Summary of the invention
The purpose of this invention is to provide endogenetic fungus geotrichum candidum and the application thereof of a strain from the plant Rhizoma et Radix Diphylleiae.
Geotrichum candidum provided by the invention (Geotrichum candidum); Called after WEQC; The root and the root stock of the separation plant Rhizoma et Radix Diphylleiae (Diphyllria sinensis L.) that Red River Valley (height above sea level 1560m) is gathered from the Mei County, Shaanxi Province; Be preserved in China Committee for Culture Collection of Microorganisms common micro-organisms center (be called for short CGMCC, the address is: No. 3, Yard 1, BeiChen xi Road, Chaoyang District, Beijing City), culture presevation number was CGMCC No.3783 on 04 27th, 2010.Geotrichum candidum (Geotrichum candidum) WEQC CGMCC No.3783 is called for short geotrichum candidum WEQC.
Geotrichum candidum WEQC can be used for preparing podophyllotoxin glucoside and/or the two glucosides of epipodophyllotoxin.
The present invention also protects a kind of method for preparing podophyllotoxin glucoside and/or the two glucosides of epipodophyllotoxin, is fermentation culture geotrichum candidum WEQC, obtains the two glucosides of podophyllotoxin glucoside and/or epipodophyllotoxin.
The substratum of said fermentation culture can be the potato glucose substratum.
The condition of said fermentation culture can be: 26-30 ℃, 100-150rpm shaking culture 5-9 days.The condition of said fermentation culture specifically can be: 28 ℃, 120rpm shaking culture 7 days.
Said method also can comprise the step that fermented liquid is extracted.The extraction agent of said extraction specifically can be chloroform.
The two glucosides of epipodophyllotoxin (Picropodophillotoxin7 '-structural formula of O-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranoside) is suc as formula shown in 1.
The podophyllotoxin glucoside (Podophyllotoxin 7 '-structural formula of O-β-D-glucopyranoside) is suc as formula shown in 2.
Formula 1 formula 2
Geotrichum candidum WEQC of the present invention has the physiological property that produces podophyllotoxin glucoside and the two glucosides of epipodophyllotoxin, can be used for the preparation of podophillotoxines material.The method for preparing podophyllotoxin glucoside and the two glucosides of epipodophyllotoxin provided by the invention, fermentation condition is simple, bacterial classification is prone to cultivation, with short production cycle, has the application potential of commercial scale prodn.The present invention provides new way for the development of resources of podophillotoxines material, and is significant to the protective plant ecological diversity.
Description of drawings
Fig. 1 is the colonial morphology of geotrichum candidum.
Fig. 2 is the form of geotrichum candidum mycelia and arthrospore.
Fig. 3 is the HPLC spectrogram of podophyllotoxin glucoside standard substance.
Fig. 4 is the HPLC spectrogram of the two glucoside standard substance of epipodophyllotoxin.
Fig. 5 is the HPLC spectrogram of chloroform extract.
Embodiment
Following embodiment is convenient to understand better the present invention, but does not limit the present invention.Experimental technique among the following embodiment like no specified otherwise, is ordinary method.Used test materials among the following embodiment like no specified otherwise, is to buy from routine biochemistry reagent shop and obtains.Quantitative test in following examples all is provided with repeated experiments three times, results averaged.
The separation of embodiment 1, geotrichum candidum WEQC and evaluation
One, sample collecting
Sample is the root and the root stock of 2010 the 06 month plant Rhizoma et Radix Diphylleiae (Diphyllria sinensis L.) that Red River Valley (height above sea level 1560m) is gathered from the Mei County, Shaanxi Province.
Two, the separation of geotrichum candidum WEQC and screening
The sample of gathering is cleaned with tap water respectively, and with 75% (volumn concentration) Ethanol Treatment 5min, aseptic water washing is 3-5 time then in Bechtop; Then use 2.5% (quality percentage composition) Youxiaolin to handle 10min again, aseptic water washing is 3-5 time again.Tweezers and blade with sterilization are peelled off the crust of the root of Rhizoma et Radix Diphylleiae, and the small pieces that are cut into 0.5cm * 0.5cm size are again planted on the PDA solid medium, cultivate 3-7 days for 28 ℃.The root of the Rhizoma et Radix Diphylleiae of simultaneously same sterilising treatment being crossed is not done peeling and cutting, and the root of Rhizoma et Radix Diphylleiae after the week of rolling on the PDA substratum, is cultivated as controlled observation with condition.
Cultivating after several days the incision of finding at the root of Rhizoma et Radix Diphylleiae has mycelia to grow; Get the mycelia that incision newly grows, be transferred on the fresh PDA substratum and cultivate, treat that bacterium colony occurs after; According to the form of bacterium colony, the difference of color and the difference that bacterium colony grows the time; The mycelium inoculation at picking substratum edge carries out separation and Culture on new PDA substratum respectively, and until filtering out single bacterium colony, picking list bacterium colony is done further research.
Single colony inoculation that above-mentioned separation is obtained after cell grows to the logarithmic growth later stage, and the bacterium colony size is stable, carries out the description of single bacterium colony mean state to the PDA substratum.The bacterial strain called after WEQC that separation is obtained.
Three, the evaluation of geotrichum candidum WEQC
Bacterial strain WEQC colony growth on the PDA substratum is rapid, and white is flat or have fine hair shape aerial hyphae and the edge is the fringe shape slightly, and concrete colonial morphology is as shown in Figure 1.Thalline is a fungal filament, often is y-bend or trident branch, and tabula is many or few, and mycelia 2.5-9 micron is generally the 3-7 micron; Fragmentation; Mycelium is come off by the tabula place, forms arthrospore; Arthrospore is single, one-tenth is two or chain, and long tubular, square also has ellipse or circle, and terminal circle is blunt; Arthrospore is about (5-17) * (4-6) micron mostly.
Comprehensive above-mentioned characteristic according to data such as " fungi identification handbook ", " Chinese fungi will ", is accredited as geotrichum candidum (Geotrichum candidum) with bacterial strain WEQC, and its classification belongs to deuteromycetes, Moniliales, Moniliaceae, Geotrichum.WEQC is preserved in China Committee for Culture Collection of Microorganisms common micro-organisms center with geotrichum candidum (Geotrichum candidum), and preserving number is No.3783.Geotrichum candidum (Geotrichum candidum) WEQC CGMCCNo.3783 is called for short geotrichum candidum WEQC.
One, cultivates bacterial strain
Potato glucose liquid nutrient medium (natural pH): peeling yam 200g (is cut into about 2cm
2Fritter), put into beaker and boil 30min, filter with double gauze then, getting filtrating and adding 20g glucose, add water and be settled to 1000mL.
Single colony inoculation of picking geotrichum candidum WEQC is in 250ml triangular flask (100ml potato glucose liquid nutrient medium is housed, sterilizes), and 28 ℃, 120r/min shaking table were cultivated 7 days, obtained bacterium liquid.
Two, preparation extract
1, with bacterium liquid with suction filter suction filtration twice, collect mycelium and fermented liquid respectively.
2, fermented liquid is extracted with isopyknic chloroform (extraction agent), get extraction liquid;
3, raffinate is got extraction liquid with isopyknic chloroform (extraction agent) extraction;
Carry out the operation of step 3 repeatedly, all get raffinate at every turn and (detect wavelength: 254nm) detect down, until raffinate no fluorescence under ultraviolet absorption detector in ultraviolet absorption detector; Combining extraction liquid, underpressure distillation is reclaimed, and obtains the chloroform extract of fermented liquid.
Three, performance liquid chromatography (HPLC) detects
Adopt HPLC (HPLC) to detect the chloroform extract of step 2; Simultaneously with podophyllotoxin glucoside standard substance and two glucoside standard substance (the Changqi ZHAO of epipodophyllotoxin; Akito NAGATSU, Keiichiro HATANO, Naohiro SHIRAI; Setsuko KATO; And Yukio OGIHARA, New Lignan Glycosides from Chinese Medicinal Plant:Sinopodophillum emodi, Chem.Pharm.Bull.51 (3): 55-261 (2003)) as contrast.
Concrete detection method is following:
Before the detection, two glucoside standard substance of podophyllotoxin glucoside standard substance and epipodophyllotoxin and chloroform extract are fully dissolved 0.45 μ m filtering with microporous membrane respectively with methyl alcohol.Adopt external standard method to analyze, each sample is triplicate at least, and three repetitions are established in experiment.
High performance liquid chromatograph: Aglient 1100 types;
Chromatographic column: Aglient 1100 Eclipse XDB-C
18(5 μ m, 4.6 * 150mm);
Detector: UV-detector; Detect wavelength: 254nm;
Moving phase: methyl alcohol: water=60: 40 (volume ratio);
Flow velocity: 0.5ml/min;
Sample size: 5 μ l;
Column temperature: room temperature;
Standard substance: the two glucosides (formula 1) of epipodophyllotoxin, podophyllotoxin glucoside (formula 2).
Formula 1 formula 2
Fig. 3 is the HPLC spectrogram of podophyllotoxin glucoside standard substance.Fig. 4 is the HPLC spectrogram of the two glucoside standard substance of epipodophyllotoxin.Fig. 5 is the HPLC spectrogram of chloroform extract.The HPLC spectrogram of chloroform extract is compared with the HPLC spectrogram of podophyllotoxin glucoside standard substance and the two glucoside standard substance of epipodophyllotoxin respectively.Chloroform extract has absorption peak when RT is 5.631 minutes, and podophyllotoxin glucoside standard substance had absorption peak in the time of 5.577 minutes, explain to contain the podophyllotoxin glucoside in the chloroform extract.Chloroform extract has absorption peak when RT is 3.454 minutes, and the two glucoside standard substance of epipodophyllotoxin had absorption peak in the time of 3.400 minutes, explains to contain the two glucosides of epipodophyllotoxin in the chloroform extract.Above result shows, contains the two glucosides of podophyllotoxin glucoside and epipodophyllotoxin in the chloroform extract of fermented liquid.
Four, thin-layer chromatography (TLC) detects
Adopt thin-layer chromatography (TLC) to detect the chloroform extract of step 2, simultaneously with podophyllotoxin glucoside (formula 2) standard substance and epipodophyllotoxin pair glucoside (formula 1) standard substance as contrast.
Concrete testing conditions is following:
At first, get podophyllotoxin standard substance, podophyllotoxin glucoside standard substance and chloroform extract, fully dissolve with methyl alcohol respectively; On positive thin layer plate and reversed phase thin layer plate, be total to chromatography then respectively; Under uv lamp, detect, and develop the color (15: 85, volume ratio) further to use sulfuric acid-ethanol; Color after the spot fluorescence color of observation sample and standard substance and the colour developing, and calculate the Rf value respectively.
The positive thin-layer chromatography:
Chloroform layer extract developping agent: chloroform: methyl alcohol=80: 20 (volume ratio).
Inverse thin layer chromatography:
Chloroform layer extract developping agent: methyl alcohol: water=60: 40 (volume ratio).
Ultraviolet detection wavelength: 254nm.
On the normal-phase chromatography plate: the Rf value of the two glucoside standard substance of epipodophyllotoxin is 0.22; And same in chloroform extract to have a Rf value be 0.22 spot; Its spot has identical fluorescence color with the two glucoside standard substance of epipodophyllotoxin under uv lamp; Contain the two glucosides of epipodophyllotoxin in the chloroform extract with also having identical color after sulfuric acid-ethanol colour developing, explaining; The Rf value of podophyllotoxin glucoside standard substance is 0.58; And same in the chloroform extraction matter sample to have a Rf value be 0.58 spot; Its spot has identical fluorescence color with podophyllotoxin glucoside standard substance under uv lamp; With also having identical color after sulfuric acid-ethanol colour developing, explain and contain the podophyllotoxin glucoside in the chloroform extract.
On the reversed phase chromatography plate: the Rf value of the two glucoside standard substance of epipodophyllotoxin is 0.78; And same in chloroform extract to have a Rf value be 0.78 spot; Its spot has identical fluorescence color with the podophyllotoxin standard substance under uv lamp; Contain the two glucosides of epipodophyllotoxin in the chloroform extract with also having identical color after sulfuric acid-ethanol colour developing, explaining; The Rf value of podophyllotoxin glucoside standard substance is 0.48; And same in chloroform extract to have a Rf value be 0.48 spot; Its spot has identical fluorescence color with the podophyllotoxin standard substance under uv lamp; With also having identical color after sulfuric acid-ethanol colour developing, explain and contain the podophyllotoxin glucoside in the chloroform extract.
Claims (8)
1. geotrichum candidum (Geotrichum candidum) WEQC, it is characterized in that: be preserved in China Committee for Culture Collection of Microorganisms common micro-organisms center, deposit number is CGMCC No.3783.
2. the application of geotrichum candidum (Geotrichum candidum) WEQC CGMCC No.3783 in preparation podophyllotoxin glucoside and/or the two glucosides of epipodophyllotoxin.
3. method for preparing the two glucosides of podophyllotoxin glucoside and/or epipodophyllotoxin; Be fermentation culture geotrichum candidum (Geotrichum candidum) WEQC CGMCC No.3783, obtain the two glucosides of podophyllotoxin glucoside and/or epipodophyllotoxin.
4. method according to claim 3 is characterized in that: the substratum of said fermentation culture is the potato glucose substratum.
5. according to claim 3 or 4 described methods, it is characterized in that: the condition of said fermentation culture is: 26-30 ℃, 100-150rpm shaking culture 5-9 days.
6. method according to claim 5 is characterized in that: the condition of said fermentation culture is: 28 ℃, 120rpm shaking culture 7 days.
7. according to claim 3 or 4 described methods, it is characterized in that: said method also comprises the step that fermented liquid is extracted.
8. method according to claim 7 is characterized in that: the extraction agent of said extraction is a chloroform.
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| CN101603011A (en) * | 2009-06-18 | 2009-12-16 | 北京师范大学 | The method and the special strain therefore thereof that prepare the two glucosides of epipodophyllotoxin |
| CN101701193A (en) * | 2009-11-19 | 2010-05-05 | 北京师范大学 | Method for preparing podophyllotoxin and/or astragaloside and special bacterial strain thereof |
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| CN101575576A (en) * | 2009-06-18 | 2009-11-11 | 北京师范大学 | Aspergillus fumigatus and application thereof |
| CN101603011A (en) * | 2009-06-18 | 2009-12-16 | 北京师范大学 | The method and the special strain therefore thereof that prepare the two glucosides of epipodophyllotoxin |
| CN101701193A (en) * | 2009-11-19 | 2010-05-05 | 北京师范大学 | Method for preparing podophyllotoxin and/or astragaloside and special bacterial strain thereof |
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