EP1683059A2 - Verfahren zur visualisierung der adme-eigenschaften chemischer substanzen - Google Patents
Verfahren zur visualisierung der adme-eigenschaften chemischer substanzenInfo
- Publication number
- EP1683059A2 EP1683059A2 EP04790632A EP04790632A EP1683059A2 EP 1683059 A2 EP1683059 A2 EP 1683059A2 EP 04790632 A EP04790632 A EP 04790632A EP 04790632 A EP04790632 A EP 04790632A EP 1683059 A2 EP1683059 A2 EP 1683059A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- adme
- properties
- substances
- classification
- structures
- 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.)
- Withdrawn
Links
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Classifications
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/80—Data visualisation
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/30—Prediction of properties of chemical compounds, compositions or mixtures
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/70—Machine learning, data mining or chemometrics
Definitions
- the invention relates to a computer system and a method for the visualization of ADME properties for a large number of chemical substances and subsequent selection as well as automated filtering of the substances on the basis of a predetermined requirement profile.
- This invention builds on an earlier development (DE 101 60 270 AI) and represents an extension and improvement over it, which greatly simplifies data evaluation and interpretation.
- Medicinal active ingredients for example, " must be able to reach the point in the body where they should act ("target ”) in order to show the desired biochemical effect (eg inhibition of an enzyme or the like) at this point.
- substance properties such as lipophilicity, solubility, permeability via artificial membranes or cell layers, molecular weight and number of certain structural features such as Hydrogen donors and acceptors considered.
- the assessment of the substances is then usually carried out by adhering to certain limits, which are usually obtained from empirical values, expert knowledge or from the statistical distribution of the properties of commercial products.
- a well-known, widely used set of rules that has been derived in this way is Lipinski's "Rule of Five" for the description of orally administrable active ingredients (CA Lipinski et. Al., Adv. Drug Del. Rev. 23, pp. 3-25 (1997 )).
- the present invention relates to an improved method which, in addition to the calculation of the ADME properties for a large number of chemical substances, also visualizes the properties in the form of so-called ADME maps and a subsequent graphic selection and automated filtering of particularly suitable drug candidates based on a specified requirement profile, as well as a corresponding computer program and method.
- a visualization of the ADME properties using such ADME maps is advantageous compared to a representation of the ADME properties in tabular form (as described in DE .101 60 270 AI), since it shows all substances from the substance library with one another at a glance. Relationship sets, and thus allows a very simple and quick assessment of the substances in relation to the ADME property.
- the direct linkage of a biophysical model with a visualization tool described in the present application is novel, as is the combination with application-specific, indication-dependent requirement profiles which relate directly to the ADME properties (and not, as is customary in the prior art, to the molecular structural properties ) Respectively.
- this also enables automated filtering and substance evaluation.
- This can be applied both to substance libraries with hundreds of thousands of individual substances, as are now common in industrial and pharmaceutical research, and also in the context of drug discovery projects for decision support and project control.
- the invention relates to a method for visualizing ADME properties and for selecting chemical substances and structures on the basis of an indication-specific target profile with the following steps: a) Determination or selection and then input of molecular properties. a large number of substances or chemical structures in a computer system,
- the molecular properties according to a) are preferably a selection from the following properties:
- Lipophilicity binding constant to plasma proteins, molecular weight, molecular volume, water solubility, solubility in intestinal fluid, permeability coefficient via a biological membrane, free fraction in plasma, kinetic constants of a metabolic process, kinetic constants of an active transport process.
- biophysical model One or more of the following is preferably selected as the biophysical model:
- physiology-based pharmacokinetic model for mammals physiology-based pharmacokinetic model for insects physiology-based pharmacokinetic model for plants.
- the ADME properties are preferably a selection of the following: In the case of a model for mammals: free fraction in plasma, organ / blood partition coefficient, organ / plasma partition coefficient, volume of distribution, terminal half-life in blood, plasma, or an organ, - intestinal permeability, absorbed portion of a dose of the substance according to the oral route Application, ' maximum concentration in blood, plasma, or an organ.
- the target profile is obtained from empirical values, expert knowledge and / or from the statistical distribution of relevant ADME properties for known substances.
- the classification is particularly preferably carried out using truth values which represent the fulfillment of an individual requirement of an ADME property.
- the classification is particularly preferably done by linking several truth values, which represent the fulfillment of an individual requirement, using Boolean algebra.
- the classification takes place by means of an index value which quantifies the deviation from a target value.
- the classification is carried out by means of a weighted averaging of a plurality of index values which quantify the deviation from a target value.
- Another preferred variant of the method is characterized in that the classification is carried out by means of a probability value which indicates the probability rank based on an empirical distribution function for an ADME property obtained from known substances.
- the substance properties can be entered by taking values from a substance database or using substance information obtained from experiments, which is available in particular as a file.
- the selection and filtering can be carried out by means of graphical selection by the operator of the computer system or can be carried out automatically by the computer system using predetermined requirement profiles.
- PBPK physiology-based pharmacokinetics
- a PBPK model for mammals is mathematically detailed e.g. B. by Kawai et al. (R.KA AI, M. LEMAIRE, J.-L. STEIMER, A. BRUELISAUER, W. NIEDERBERGER, M. ROWLA D: "Physiologically Based Pharmacokinetic Study on a Cyclosporin Derivative, SDZ IMM 125" J. Pharmacokin. Biopharm. 22, 327-365 (1994)).
- a PBPK model for lepidopteran larvae was developed by Greenwood et al. (R.
- the basic principle is shown in Fig. 1.
- the starting point is a library or database of chemical structures (11), which contains molecular properties for a multitude of structures (12). These molecular properties can either have been determined experimentally beforehand, or they can also have been determined using known structure-based prediction methods such as QSAR or neural networks.
- an "ADME map” (14) is created for the ADME property of interest.
- An ADME map is a two-dimensional, in particular false-color or contour-coded representation of the ADME property as a function of two or more molecular substance properties due to the structure, on which this ADME property depends.
- the calculation is preferably carried out - as described in DE 101 60 270 AI - using biophysical models (13).
- the so-called “mapping” takes place, ie the substances contained in the substance library are shown as data points in this ADME map (15).
- the position of each substance in this ADME map is determined by its molecular structure.
- additional can be found within an ADME map Information such as B. other molecular structural properties or derived ADME properties, the date of synthesis, the name of the synthesis chemist or the like, for example by color, symbol or size modulation of the data points. In this way, for example, it is easily possible to trace the historical development of an active ingredient research project.
- the substances are selected.
- a target profile is defined (16), which the substances to be selected should ideally have (or alternatively should never have) in relation to the ADME property.
- An indication-specific target profile in the sense of the invention is understood to mean selected criteria and values which specify a desired ADME property.
- the target profile for the ADME property is application specific.
- the target profile usually defines a sub-area of the ADME map. As such, it can also be highlighted optically, e.g. by means of delimiting lines or by varying the display parameters (hue, saturation, etc.) on the colored ADME map.
- the comparison of the position of each substance on the ADME map with the target profile enables the substances to be assessed (17).
- Steps one to three can be carried out analogously for further relevant ADME properties, so that overall a substance assessment can be carried out on the basis of several ADME properties.
- a preferred method for defining a target profile is shown in FIG. 2.
- a knowledge-based database on advantageous (and / or particularly disadvantageous) ADME properties is created (24).
- the source of this knowledge-based database is, for example, empirical values (21), expert knowledge (22) and / or - similar to the procedure of Lipinski et al. [CA Lipinski et al., Adv. Drug Del. Rev. 23, 3-25 (1997)] - also the statistical distribution of relevant ADME properties for commercial products (23) ⁇ note. : but just for the ADME property and not just for the molecular structure property!).
- Suitable sources for such analyzes are, for example, databases such as the World Drug Index, Red List, Pesticide Manual, PhysProp database, NCI databases, Medline, etc.
- the requirements for the ADME properties for active substances are generally indication-specific.
- a statistical distribution function for each individual ADME property can now be derived from this knowledge database (25), which indicates the probability with which a particular ADME property assumes a certain value.
- These probability representations can be used individually for classification or can also be combined into a single value (index) by weighting the individual probability representations (26).
- FIG. 3 Each data point is now examined on each ADME map for its affiliation with the target profile area.
- absolute or relative weightings are calculated for each individual requirement (e.g. from the distance of a data point to the borderline of the target profile or as a probability value that is derived from the empirical distributions for known commercial substances).
- the individual classifiers can be summed up to a total index value (32). This overall index value determines the ranking of the substances (33).
- the result which is a subset of the starting substances (34), can be output in tabular form or in the form of graphs (35).
- the ADME maps from FIGS. 4 and 9 for the maximum absorbed portion of an orally administered dose and FIG. 10 for the fraction dose absorbed are based on a continuous model for gastrointestinal flow and Absorption of an oral dose.
- This model combines physiological influencing factors such as the geometric dimensions, pH profile and effective surface of the gastrointestinal tract with a physiological flow profile described via an intestinal transit function (T s ; (z, t)) and two substance-dependent parameters, intestinal permeability (P ⁇ t ) and intestinal solubility (Sj nt ).
- T s intestinal transit function
- P ⁇ t intestinal permeability
- Sj nt intestinal solubility
- ⁇ GE means the time constant for the release of the substance from the stomach in the intestine, which in the model is 30 min. was accepted.
- the concentration of the substance at location z in the intestinal lumen at time t can be calculated as follows:
- DOSE means the dose administered
- BW stands for body weight
- f a S (t) is the portion already absorbed at time t.
- the solubility can limit the amount absorbed by the fact that the substance precipitates in the gastrointestinal tract if there are locally luminal concentrations that exceed the value for the solubility (S ⁇ t). This case is taken into account by considering the threshold value, which always limits the luminal concentration to the value of the intestinal solubility: ⁇ lumen , II ] umen _ ⁇ ⁇ t if C ' consecutivelur m n.cn> s ; , (4)
- the total amount of substance that is absorbed into the portal vein in the region [z..z + dz] in the time interval [t..t + dt] via the intestinal membrane is: d 2 M py (z, t) dA eff (z),,, ⁇ r int Aumen ⁇ ⁇ >. dz dt dz (5)
- solubility has no limiting influence (ie at all times C lumen ⁇ S k t), the maximum absorbed portion of an orally administered dose is obtained, which is shown in Fig. 4 and 9 , The general case with a solubility limit is shown in Fig. 10.
- Intestinal permeability is therefore the only variable that determines the maximum absorbed portion of an orally administered dose.
- MA physicochemical substance parameters lipophilia
- MW molecular weight
- the first example shows an ADME map for the maximum absorbed portion of an orally administered dose in humans, which was calculated according to the method described above using a physiology-based pharmacokinetic model.
- two selection criteria known according to the prior art for oral active substances which belong to Lipinski's "Rule-of-Five” are also drawn in as lines (lipophilicity ⁇ 5 and molecular weight ⁇ 500).
- active ingredients are unsuitable for passive intake after oral administration, for example, if they have lipophilicity> 5 and a molecular weight> 500 (identified by (- / -) in FIG. 4).
- the complex biophysical model takes into account the combined influence of these two parameters on oral intake. Accordingly, under certain circumstances (sufficient solubility), a substance with a molecular weight> 500 and a lipophilia> 5 able to permeate the intestinal membrane and thus be taken up orally. Examples of such substances which can be absorbed passively despite high lipophilicity and high molecular weight are itraconazole (De Beule K., Van Gestel J., Drugs. 2001; 61 Suppl. 1: pp.
- the second example shows a selection of ADME maps for a data set of commercial substances from different indication areas.
- the following measured values were experimentally ascertained for the substances contained in this data set: membrane affinity as a measure of lipophilicity (LogMA), binding constant to human serum albimun (LogHSA, both based on the TRANSIL ® technology developed by the company Nimbus, Leipzig).
- the effective molecular weight (MW) is simply derived from the molecular formula of the substance.
- the water solubilities and the typically administered dosages of these commercial products are known from the literature.
- the ADME maps from FIGS. 5 to 10 show an example of a selection of pharmaceutical commercial substances.
- the substance names and the associated experimental measurement values for their physical properties are summarized in Table 1.
- the organ-blood distribution coefficients for the various organs from FIGS. 5 ' to 8 were determined by the method described in DEOO 10160270 (page 5 from paragraph [0051] using the data in FIG. 3).
- Fig. 5 shows an example of the map for the fat / plasma distribution coefficient, which was determined by the method described in DE 101 60 270 AI.
- Fig. 6 shows an example of the map for the human distribution volume, which was determined by the method described in DE 101 60 270 AI.
- Fig. 7 shows an example of the map for the free fraction in plasma, which was determined by the method described in DE 101 60 270 AI.
- Fig. 8 shows an example of the map for the intestinal permeability coefficient, which was determined by the method described in DE 101 60 270 AI.
- FIG. 9 shows an example of the map for the maximum absorbed dose in humans in the permeation-limited case, which was determined using the described method with the aid of a physiology-based pharmacokinetic model.
- FIG. 10 shows an example of the map for the absorbed dose in humans in the case of permeation or solubility-limited cases, which was determined according to the method described in DE 101 60 270 AI using a physiology-based pharmacokinetic model.
- the ADME map for the phloem mobility in Fig. 11 was determined using a dell PBPK Mo 'for plants, which in Satchivi et al. (Satchivi NM, Stoller EW, Wax L. M, Briskin DP, A nonlinear dynamic Simulation model for xenobiotic transport and whole plant allocation following foliar application Parts I and J. Pest. Biochem. And ' Physiol. 2000; 68: 67-95 ) is fully described.
- Such ADME maps can be used particularly well in a research project to obtain an intuitive graphical overview of the ADME properties of a library of substances.
- the ranking is carried out in combination with indication-specific rules.
- indication-specific rules can, for example, define a threshold value for the free plasma fraction, a limit value for the fat / plasma distribution coefficient, a threshold value for the distribution volume or the proportion of the orally absorbed dose.
- limit values do not represent ADME properties.
- the preferred range can be highlighted in color (eg by modulating the color saturation). Substances that meet the requirement profile can then simply be selected and highlighted.
- a classification of the substances in relation to the preferred ADME profile can be created. Further information can be visualized by color and / or size modulation of the data points.
- the use of the technology described is not limited to applications in the field of pharmaceutical research from which the examples described so far originate. Use is also possible in other areas in which ADME properties of substances play a role and where • biophysical models are available for their calculation.
- An example is the distribution of pesticides or other substances in plants. Due to large pH differences within the plant, the transport in the plant is not only dependent on the lipophilicity of the substances but also strongly on their pKa values. An important property is the distribution of substances from treated leaves into other parts of plants (the so-called phloem mobility).
- FIG. 11 shows a corresponding, contour-coded property map in which areas of strong translocation (contour line values> 10 "1 ) and weak translocation (contour line values ⁇ 10 " 3 ) can be seen.
- This property map was created using the described physiology-based plant model. It is easy to see that here, too, it is not possible to classify the data points drawn in using simple rules that operate on the sizes lipophilicity and pKa, while substances with a specific distribution behavior can easily be identified using the method described above.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10350525A DE10350525A1 (de) | 2003-10-29 | 2003-10-29 | Verfahren zur Visualisierung der ADME-Eigenschaften chemischer Substanzen |
| PCT/EP2004/011810 WO2005043441A2 (de) | 2003-10-29 | 2004-10-19 | Verfahren zur visualisierung der adme-eigenschaften chemischer substanzen |
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| Publication Number | Publication Date |
|---|---|
| EP1683059A2 true EP1683059A2 (de) | 2006-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| EP04790632A Withdrawn EP1683059A2 (de) | 2003-10-29 | 2004-10-19 | Verfahren zur visualisierung der adme-eigenschaften chemischer substanzen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20050137807A1 (de) |
| EP (1) | EP1683059A2 (de) |
| JP (1) | JP2007510206A (de) |
| DE (1) | DE10350525A1 (de) |
| WO (1) | WO2005043441A2 (de) |
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| CN104102798A (zh) * | 2005-07-21 | 2014-10-15 | 皇家飞利浦电子股份有限公司 | 用于药物代谢动力学建模的自动输入函数估计 |
| FR2910147B1 (fr) * | 2006-12-19 | 2009-02-06 | Galderma Res & Dev S N C Snc | Methode correctrice de traitement de resultats d'experiences transcriptomiques obtenus par analyse differentielle |
| US20090210209A1 (en) * | 2008-02-20 | 2009-08-20 | Irody Inc | Apparatus and method for simulating effects of substances |
| DE102014115088A1 (de) * | 2014-10-16 | 2016-04-21 | Sovicell Gmbh | Bestimmung von Bindungskonstanten mittels Gleichgewichtsverlagerung |
| KR102587959B1 (ko) | 2018-01-17 | 2023-10-11 | 삼성전자주식회사 | 뉴럴 네트워크를 이용하여 화학 구조를 생성하는 장치 및 방법 |
| CA3155134A1 (en) * | 2019-09-26 | 2021-04-01 | Terramera, Inc. | Systems and methods for synergistic pesticide screening |
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| JPH07262172A (ja) * | 1994-03-18 | 1995-10-13 | Fujitsu Ltd | データ分析装置 |
| JP2000242694A (ja) * | 1999-02-18 | 2000-09-08 | Pioneer Electronic Corp | 営業戦略支援システム及びプログラムを記録した機械読み取り可能な媒体 |
| WO2002059561A2 (en) * | 2001-01-26 | 2002-08-01 | Bioinformatics Dna Codes, Llc | Modular computational models for predicting the pharmaceutical properties of chemical compounds |
| JP4677679B2 (ja) * | 2001-03-27 | 2011-04-27 | 株式会社デンソー | 製品の製造プロセスにおける特性調整方法 |
| DE10160270A1 (de) * | 2001-12-07 | 2003-06-26 | Bayer Ag | Computersystem und Verfahren zur Berechnung von ADME-Eigenschaften |
-
2003
- 2003-10-29 DE DE10350525A patent/DE10350525A1/de not_active Withdrawn
-
2004
- 2004-10-19 JP JP2006537131A patent/JP2007510206A/ja active Pending
- 2004-10-19 EP EP04790632A patent/EP1683059A2/de not_active Withdrawn
- 2004-10-19 WO PCT/EP2004/011810 patent/WO2005043441A2/de not_active Ceased
- 2004-10-22 US US10/971,458 patent/US20050137807A1/en not_active Abandoned
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| See references of WO2005043441A2 * |
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| Publication number | Publication date |
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| US20050137807A1 (en) | 2005-06-23 |
| WO2005043441A2 (de) | 2005-05-12 |
| JP2007510206A (ja) | 2007-04-19 |
| WO2005043441A8 (de) | 2005-12-29 |
| DE10350525A1 (de) | 2005-06-09 |
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