TFA-01 | Nonsteroidal drug development for canine osteoarthritisView development progress

TFA EVIDENCE LIBRARY

Science and intellectual property

Explore the basis for TFA-01 development, from published research on Antcin A’s mechanism to preliminary company studies, formal research plans, and related technology patents.

PEER-REVIEWED · PATENT RECORDS
PEER-REVIEWED · PATENT RECORDS

01 · Therapeutic Rationale & Scientific Evidence

A drug candidate with the potential to replace corticosteroids

Corticosteroids have well-established therapeutic value, but the challenges of repeated or prolonged use create demand for new treatments. TFA-01 is an Antcin A-based drug candidate being studied for its potential to provide anti-inflammatory activity with an improved long-term benefit-risk profile.

Treatment Need

Long-term treatment requires more than efficacy alone

Chronic inflammatory conditions require ongoing management. TFA aims to develop a new treatment option and evaluate its potential for repeated use.

Published Research

Antcin A offers a scientific starting point

A 2011 cell study reported that Antcin A induced nuclear translocation of the glucocorticoid receptor (GR)—movement of the receptor from the cytoplasm into the nucleus.

Read the original study
Company Research

Advancing published findings through TFA’s research program

Preliminary in vitro research by Dr. Huang’s team observed anti-inflammatory signals, supporting further work on dosing, formulation, safety, and canine OA.

GR nuclear translocation and in vitro findings support further development; potential as an alternative to corticosteroids requires validation in formal studies.

Explore the scientific evidence
Evidence boundaries

Preclinical research does not establish clinical benefit, and patents do not imply drug approval. Each item states its limits.

HOW TO READ THE EVIDENCE

How published scientific findings inform TFA’s drug research

The 2011 GR nuclear translocation study provides a starting point. TFA is building on preliminary in vitro findings and canine observations to advance formal safety, formulation, and clinical studies.

01

Keep molecules distinct

Antcin A, Antcin K and Antrocin are different compounds. Findings for one cannot be applied to another.

02

Label every model

General cell models, Caco-2 absorption models, animal studies, and human evidence represent different levels; each publication is labeled accordingly.

03

Keep conclusions within the evidence

Mechanistic signals are not described as clinical benefit, and exploratory findings are not described as approved uses.

DEVELOPMENT EVIDENCE MAP

The evidence supporting TFA-01 development

Each of the five development workstreams identifies the available evidence and what remains to be verified.

01

Molecule, mechanism & rights

Published research foundation / program validation underway

Published studies support GR/GRα-related signaling by Antcin A in defined models. TFA is assessing how those findings apply to its current test articles, batches and canine OA development program.

Next milestoneComplete candidate test-article and batch definition and strengthen program-level pharmacology relevant to canine osteoarthritis.LimitationsAvailable studies do not establish direct biochemical binding between Antcin A and GR, canine or human clinical efficacy, program-specific pharmacokinetic parameters, or drug approval.View progress details
02

CMC & controlled supply

Sourcing foundation in place / specifications and batch bridging underway

Research on strains from multiple sources and their Antcin A content supports controlled cultivation, strain selection, purification, analytical testing and formulation development.

Next milestoneComplete physicochemical validation of the nanoformulation, then advance formal specifications, batch consistency and process scale-up.LimitationsFormal specifications, COAs, batch consistency, commercial scale-up and GMP validation are not complete. The nanoformulation remains under physicochemical validation, and final formulation specifications have not yet been established.View progress details
03

Safety & toxicology

Preliminary 14-day repeat-dose study completed | Formal studies advancing

A 14-day repeat-dose preliminary toxicology study in female rats is complete and a report is available to inform later study design. The Graduate Institute of Animal Vaccine Technology is advancing target-animal safety, toxicology, residue and formulation-related research.

Next milestoneComplete the subsequent regulatory toxicology reports and establish the safe dose range for the purified candidate drug substance and final product under this development program.LimitationsThe preliminary screen was not GLP regulatory toxicology or a long-term safety study. It does not establish canine safety, long-term safety, or the safety of purified Antcin A or a final product.View progress details
04

Canine OA clinical development

First-stage agreement signed / preliminary cell testing underway

TFA completed uncontrolled exploratory observations in 15 dogs. The first-stage canine osteoarthritis research agreement has been signed, and preliminary cell-based testing is underway ahead of a standardized study.

Next milestoneComplete the canine OA study under a protocol with prespecified endpoints and a statistical analysis plan, and prepare the study report.LimitationsThe 15-dog internal exploration was not a regulatory study and lacks verifiable formal start and end dates, a full protocol, prespecified endpoints, statistical analysis and a signed report. It does not establish efficacy, safety, equivalence or superiority. Launching the later research collaboration is not the same as study completion or a new conclusion.View progress details
05

Regulatory strategy & commercialization

Taiwan advancing / U.S. CVM planning

TFA is assembling data for a veterinary drug application in Taiwan and planning its U.S. CVM strategy. Partnership and licensing opportunities will be evaluated as the supporting data develop.

Next milestoneObtain regulatory feedback on study design, process specifications and remaining data gaps, then develop a submission plan.LimitationsRegulatory acceptance of the data, acceptance of the application for review, drug approval, launch timing and commercial outcomes remain uncertain.View progress details

CORE PUBLISHED LITERATURE

Core research relevant to Antcin A

Six core studies, ordered by year and evidence level.

Antcin ACell and computational models

GR-related anti-inflammatory mechanism

View study summary and limitations

Chen YC et al. Antcin A, a steroid-like compound from Antrodia camphorata, exerts anti-inflammatory effect via mimicking glucocorticoids. Acta Pharmacologica Sinica. 32(7):904–911. DOI 10.1038/aps.2011.36.

What the study reported
Cell experiments reported GR nuclear translocation; molecular docking offered only a computational hypothesis for possible interaction.
Evidence limitations
No animal or human efficacy data were reported. The study does not establish direct binding, clinical equivalence to steroids or the absence of steroid-related adverse effects.
PubMed
AntcinsCaco-2 absorption model

Caco-2 cell permeability

View study summary and limitations

Wang Q et al. Intestinal Absorption of Ergostane and Lanostane Triterpenoids from Antrodia cinnamomea Using Caco-2 Cell Monolayer Model. Natural Products and Bioprospecting. 5(5):237–246. DOI 10.1007/s13659-015-0072-4.

What the study reported
The Caco-2 intestinal cell model indicated passive transcellular transport characteristics for several antcins, including Antcin A.
Evidence limitations
This was an in vitro intestinal model, not a human absorption or pharmacokinetic study.
PMC
Antcin ACell and mouse models

GRα / miR-708 / NF-κB pathway

View study summary and limitations

Kumar KJS et al. MicroRNA-708 activation by glucocorticoid receptor agonists regulate breast cancer tumorigenesis and metastasis via downregulation of NF-κB signaling. Carcinogenesis. 40(2):335–348. DOI 10.1093/carcin/bgz011.

What the study reported
Breast cancer cell and mouse xenograft models indicated that Antcin A modulated NF-κB-related tumor markers through the GRα / miR-708 pathway.
Evidence limitations
This was preclinical research, not evidence of human cancer treatment.
PubMed
Antcin AIn vitro cell model

EMT, migration and invasion research

View study summary and limitations

Kumar KJS et al. Antcin-A Modulates Epithelial-to-Mesenchymal Transition and Inhibits Migratory and Invasive Potentials of Human Breast Cancer Cells via p53-Mediated miR-200c Activation. Planta Medica. 85(9–10):755–765. DOI 10.1055/a-0942-2087.

What the study reported
The study reported modulation of the p53 / miR-200c / ZEB1 axis and reductions in EMT-, migration- and invasion-related measures in breast cancer cells.
Evidence limitations
This was an in vitro cell study with no animal or human efficacy data.
PubMed
Multiple antcinsHuman epithelial cells

Exploratory ACE2-related research

View study summary and limitations

Kumar KJS et al. Antcins from Antrodia cinnamomea and Antrodia salmonea Inhibit Angiotensin-Converting Enzyme 2 (ACE2) in Epithelial Cells. Plants. 10(8):1736. DOI 10.3390/plants10081736.

What the study reported
Several antcins, including Antcin A, reduced ACE2 expression or activity in cultured human epithelial cells.
Evidence limitations
No live-virus testing or human trials were conducted; the findings do not establish antiviral activity or COVID-19 prevention.
PMC
Antcin A / multiple triterpenoidsMurine macrophage cells

Triterpenoid structure and anti-inflammatory activity

View study summary and limitations

Yang X et al. Structure and Anti-Inflammatory Activity Relationship of Ergostanes and Lanostanes in Antrodia cinnamomea. Foods. 11(13):1831. DOI 10.3390/foods11131831.

What the study reported
The study compared triterpenoid structures and anti-inflammatory activity in RAW264.7 cells, with mechanistic work focused mainly on Antcin A modulation of NF-κB, iNOS, COX-2 and inflammatory cytokines.
Evidence limitations
This was an in vitro murine cell study and cannot establish efficacy in dogs, cats or humans.
PMC

COMPANY-REPORTED PRELIMINARY SAFETY DATA

Preliminary 14-day repeat-dose toxicology report in female rats

The company has completed a preliminary 14-day repeat-dose toxicology study of TF-15 in female rats and received the report. Test-article and batch bridging to current TFA-01 remains incomplete.

Formal regulatory toxicology continues

View study design and principal observations

Study design

14 daysOnce-daily oral gavage
24 ratsFemale Sprague-Dawley rats
4 groupsControl plus three dose groups
PreliminaryDose screen, not full regulatory toxicology

Limited screening endpoints

Public-summary scope
01
Clinical observation

Mortality, appearance and visible clinical signs

02
Body weight

Before and during the study

03
Limited serum chemistry

BUN, AST and ALT

04
Liver and kidney

Gross exam, organ weights and histopathology

Principal observations

01

Within the study’s limited 14-day assessment, the report held by the company recorded no deaths, abnormal clinical signs or clear adverse findings related to the test article.

02

The findings inform dose selection for later formal studies; they do not establish long-term safety or safety in other species.

Preliminary result14-day preliminary toxicology report available

The preliminary 14-day repeat-dose study is complete and its report is available to inform later dose selection. Comparability with current TFA-01 test articles and the suitability of the data for regulatory use require further assessment.

Study limitations

This 14-day screen in 24 female rats used limited endpoints. It was not GLP regulatory toxicology or a long-term safety study and does not establish canine safety or the safety of purified Antcin A drug substance or the final product. Formal toxicology, residue and target-animal safety work continues.

Source: Preliminary toxicology report held by the company. This page presents a public summary and the study’s limitations.

EXTERNAL SOURCING REFERENCE

Research-reagent prices illustrate the cost of sourcing small quantities

International suppliers offer research-grade Antcin A in small milligram packs. The data below illustrate only the external sourcing barrier and are presented separately from TFA’s supply scale.

View CMC and development status

List prices for 1 mg research-reagent packs

United States | AOBIOUSUS$163.80 / 1 mg1 mg pack | Cat. ATN7099 | CAS 163597-24-8 | 98% HPLCChina | TargetMolRMB1,830 / 1 mg1 mg pack | Cat. TN7099 | CAS 163597-24-8 | 96.43%

Research-reagent list prices illustrate only the external sourcing barrier. TFA’s supply capability and process status are described separately in the CMC section.

Methodology and data-room note

List prices were checked on August 17, 2026. The two products have different purity levels, and per-unit prices decline at larger pack sizes; they should not be directly compared or linearly extrapolated. They do not represent industrial or GMP bulk purchase prices, product selling prices, inventory value, revenue or company valuation.

Detailed capacity calculations, process parameters and commercial scenarios are available in the Data Room under NDA.

INTELLECTUAL PROPERTY

Four-jurisdiction patent portfolio

The portfolio covers cultivation methods and porous-carrier technology. Refer to official registers for patent ownership, legal status and patent-family relationships.

Patent scope

TFA exercises relevant platform rights under the publicly filed cooperation agreement. Patents do not establish TFA-01 efficacy or approval.

View patent records and claim scope
Taiwan invention patent certificate I73510601 · TW
Taiwan

I735106

Invention patent · Granted

Antrodia cinnamomea cultivation method and porous carrier for cultivating Antrodia cinnamomea

Cultivation methods, a porous carrier, a nutrient layer and coating, and a controlled pathway for fruiting-body cultivation.

Public patent record
China invention patent certificate CN113115682B02 · CN
China

CN113115682B

Invention patent · Granted

Antrodia cinnamomea cultivation method and porous carrier for cultivating Antrodia cinnamomea

Covers cultivation-method and porous-carrier technology.

Public patent record
Japan patent certificate No. 743035603 · JP
Japan

JP7430356B2

Invention patent · Granted

Antrodia cinnamomea cultivation method and porous carrier for cultivating Antrodia cinnamomea

Covers cultivation-method and porous-carrier technology.

Public patent record
United States patent US 12,471,542 B2 front page04 · US
United States

US 12,471,542 B2

Utility patent · Granted

Antrodia cinnamomea cultivation method and porous carrier for cultivating Antrodia cinnamomea

Covers cultivation-method and porous-carrier technology.

Public patent record

From research to controlled manufacturing and drug development

Published research provides the molecular foundation; patent and process work supports source control, quality studies and future scale-up for TFA-01.

View TFA-01