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Gnarus Systems

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Louisville, Kentucky, US

About Gnarus Systems

Founded: 2009 Type: Privately Held Size: 1-10 employees

Gnarus Systems is pleased to offer cat-SAR; a peer-reviewed in silico toxicity prediction expert system. The cat-SAR system associates 2-dimensional chemical fragments with active or inactive compounds in a learning set. Unlike many other approaches, cat-SAR is transparent and model parameter selection is... Show more »

Gnarus Systems is pleased to offer cat-SAR; a peer-reviewed in silico toxicity prediction expert system. The cat-SAR system associates 2-dimensional chemical fragments with active or inactive compounds in a learning set. Unlike many other approaches, cat-SAR is transparent and model parameter selection is controlled by the user. As such, the approach is sharable and allows unrestricted user scrutiny, intervention and model optimization throughout the SAR modeling process. This rationale negates any a priori requirements that a given set of data must fit the attributes of a predefined and often proprietary modeling process.

The cat-SAR system essentially “learns” about the biological activity of chemicals by analyzing “learning sets” of data. These are endpoint specific databases of toxicological or pharmacological chemical activity (e.g., carcinogens and developmental toxicants) that are assembled by us or others. Currently, we have validated and usable learning sets for a variety of health endpoints including cancer, anticancer, genotoxicity, developmental toxicity, and chemical allergy.

Currently, cat‐SAR models are available for:

Rats, mice, and rodents carcinogenesis including gender-specific submodels
Mammary Cancer in Rodents
Tissue/organ specific carcinogenesis for 12 tumor types
Salmonella mutagenicity (i.e. the Ames Assay)
Developmental Toxicity
Allergic Contact Dermatitis
Respiratory Hypersensitivity
Mouse Local Lymph Node Assay
Ocular toxicity
Estrogen mimics based on the E-SCREEN assay
Anticancer activity to several different breast cancer cell lines

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Our Services (19)


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Natural Product Screening

Price on request

Develop user-specific computational (predictive models) and screen large natural product or synthetic chemical libraries for potentially active compounds.

Develop user-specific computational (predictive models) and screen large natural product or synthetic chemical libraries for potentially active compounds.

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REACH/TSCA Registration Support

Price on request

Fragment-based structure-activity relationship (SAR) model for various REACH/TSCA reporting requirement including QMRF/QPRF reports.

Fragment-based structure-activity relationship (SAR) model for various REACH/TSCA reporting requirement including QMRF/QPRF reports.

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Mutagenicity Testing

Price on request

Fragment-based structure-activity relationship (SAR) model for Salmonella Mutagenicity (Ames) Assay

Fragment-based structure-activity relationship (SAR) model for Salmonella Mutagenicity (Ames) Assay

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Carcinogenesis Animal Models

Price on request

Structure-activity relationship (SAR) models for cancer based on National Toxicology Program (NTP) and Carcinogenic Potency Database (CPDB) cancer data for rats and mice. Additional models for non-mutagenic/non-genotoxic carcinogens, gender-specific, and organ-selective endpoints models are available.

Structure-activity relationship (SAR) models for cancer based on National Toxicology Program (NTP) and Carcinogenic Potency Database (CPDB) cancer data for rats and mice. Additional models for non-mutagenic/non-genotoxic carcinogens, gender-specific, and organ-selective endpoints models are available.

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Contact Dermatitis Animal Models

Price on request

Fragment-based structure-activity relationship (SAR) model for Allergic Contact Dermatitis (ACD) and Mouse Local Lymph Node Assay (LLNA).

Fragment-based structure-activity relationship (SAR) model for Allergic Contact Dermatitis (ACD) and Mouse Local Lymph Node Assay (LLNA).

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Ocular Toxicology

Price on request

Structure-activity relationship (SAR) models based on data developed in the Draize Eye Test

Structure-activity relationship (SAR) models based on data developed in the Draize Eye Test

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In silico Cardiac Safety Assessment

Price on request
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Predictive Toxicology

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QSAR Studies

Quantitative Structure-Activity Relationship Studies
Price on request

• Quantitative structure-activity relationship (QSAR) studies on pharmacophores or series of congeneric chemicals in order to optimize molecular targeting, enhance biological activity, or minimizing toxicity.

• Quantitative structure-activity relationship (QSAR) studies on pharmacophores or series of congeneric chemicals in order to optimize molecular targeting, enhance biological activity, or minimizing toxicity.

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Computational Modeling

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Animal Models of Disease

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Natural Products

Price on request

Natural Products Services

Natural Products Services

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Drug Discovery

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Drug Discovery Services

Drug Discovery Services

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Drug Discovery & Development

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Drug Discovery & Development Services

Drug Discovery & Development Services

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Computational Chemistry

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Toxicology

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Categorical Structure Activity Relationship Modeling

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Animal Models and Studies

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Pharmacology & Toxicology

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