You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
{{ message }}
Repository navigation
Commit 04b8e6d
Browse filesBrowse the repository at this point in the historyBrowse files
Copy file name to clipboardExpand all lines: paper/SystemMedicine_v2_en.tex
+7-7Lines changed: 7 additions & 7 deletions
Original file line number
Diff line number
Diff line change
@@ -80,7 +80,7 @@
80
80
\begin{abstract}
81
81
We present the design and prototype implementation of a functional pathway-centric medical knowledge graph for differential-diagnosis research. Many clinical decision support systems organize knowledge around diagnoses, symptoms, or genes as primary entities. In contrast, the proposed system uses \emph{biological functional pathways} as its central organizing principle, linking genes, proteins, laboratory values, anatomical locations, cell types, and clinical diagnoses as secondary annotations.
82
82
83
-
This architecture supports a specific form of \emph{exclusion reasoning}: if a functional pathway is judged sufficiently intact on the basis of laboratory markers, genes required for that pathway can be deprioritized as primary explanations for the current presentation, subject to redundancy, pleiotropy, and measurement-quality constraints. The system is implemented as a SQLite-backed prototype with a PySide6 graphical interface and integrates public data sources (Reactome, Gene Ontology, UniProt, HGNC, Uberon, Cell Ontology).
83
+
This architecture supports a specific form of \emph{exclusion reasoning}: if a functional pathway is supported as sufficiently intact by laboratory markers, genes required for that pathway can be deprioritized as primary explanations for the current presentation, subject to redundancy, pleiotropy, and measurement-quality constraints. The system is implemented as a SQLite-backed prototype with a PySide6 graphical interface and integrates public data sources (Reactome, Gene Ontology, UniProt, HGNC, Uberon, Cell Ontology).
84
84
85
85
We describe the formal exclusion model---in both binary and probabilistic variants---together with its assumptions, limitations, and validation requirements. The prototype is demonstrated on a hemolysis--immunodeficiency scenario involving five functional pathways, eleven genes, and seven laboratory markers. The system is positioned as a research tool for exploring pathway-centric exclusion logic, not as a validated clinical decision support system.
86
86
\end{abstract}
@@ -101,7 +101,7 @@ \section{Introduction and Motivation}
101
101
\emph{If a biological functional pathway is sufficiently supported as intact, then genes whose pathogenic effect would be expected to disrupt that pathway can be deprioritized as primary explanations for the current presentation.}
102
102
\end{quote}
103
103
104
-
This transforms positive evidence (apparently intact pathway function) into negative diagnostic constraints (lower-priority candidate genes), potentially reducing the candidate space before more detailed differential-diagnostic review begins.
104
+
This transforms positive evidence (apparently preserved pathway function) into negative diagnostic constraints (lower-priority candidate genes), potentially reducing the candidate space before more detailed differential-diagnostic review begins.
105
105
106
106
Existing systems organize knowledge differently. PhenoTips \citep{Girdea2013} and Phenomizer \citep{Kohler2009} match patient phenotypes to disease databases via the Human Phenotype Ontology \citep{Robinson2008}. These systems excel at symptom-to-disease matching but do not exploit pathway integrity as exclusion evidence. Pathway databases such as Reactome \citep{Fabregat2018} and KEGG \citep{Kanehisa2023} organize around biochemical reactions but are not designed for clinical exclusion reasoning. Gene Ontology \citep{Ashburner2000} provides fine-grained process descriptions but lacks the clinical decision framework.
A practical deployment of exclusion-based clinical decision support requires integration with electronic health record (EHR) systems to obtain structured patient laboratory data. Without interoperable access to real-time laboratory values via standards such as HL7 FHIR \citep{HL7FHIR2023}, the system remains limited to manually entered measurements. EHR interoperability is a well-documented challenge in clinical informatics; addressing it is beyond the scope of this concept paper but constitutes a critical requirement for any future clinical application.
489
+
A practical deployment of exclusion-based clinical decision support would require integration with electronic health record (EHR) systems to obtain structured patient laboratory data. Without interoperable access to real-time laboratory values via standards such as HL7 FHIR \citep{HL7FHIR2023}, the system remains limited to manually entered measurements. EHR interoperability is a well-documented challenge in clinical informatics; addressing it is beyond the scope of this concept paper but remains a critical requirement for any future clinical application.
490
490
491
491
\subsection{Measurement Redundancy and Contextuality}
Gene Set Enrichment Analysis (GSEA) \citep{Subramanian2005} and related tools identify dysregulated pathways from expression data. These methods operate at the population level and require omics data that are not typically available in routine clinical settings. The proposed system instead works with individual patient laboratory values, making it more compatible with standard clinical workflows, although clinical applicability remains to be validated.
505
+
Gene Set Enrichment Analysis (GSEA) \citep{Subramanian2005} and related tools identify dysregulated pathways from expression data. These methods operate at the population level and require omics data that are not typically available in routine clinical settings. The proposed system instead uses individual patient laboratory values, making it more compatible with standard clinical workflows, although clinical applicability remains to be validated.
506
506
507
507
\subsection{Graph-Based Clinical Reasoning}
508
508
509
509
Knowledge graphs for clinical decision support have been explored in several contexts. Clinical knowledge graphs built from electronic health records \citep{Rotmensch2017} capture statistical associations between diagnoses, laboratory values, and treatments. Large-scale biomedical knowledge graphs such as Hetionet \citep{Himmelstein2017} integrate diverse data sources for drug repurposing and hypothesis generation. However, none of these systems use pathway status as an explicit constraint in exclusion reasoning.
510
510
511
511
\subsection{LLM-Augmented Biomedical Reasoning}
512
512
513
-
Recent work combines large language models with biomedical knowledge graphs. ESCARGOT \citep{Matsumoto2025} integrates LLMs with a dynamic ``Graph of Thoughts'' architecture and biomedical knowledge graphs for multihop reasoning tasks. While ESCARGOT demonstrates effective graph-based reasoning in biomedical contexts, it operates as a general-purpose reasoning agent without explicit exclusion logic. The proposed system shares the emphasis on knowledge graph-guided reasoning but differs in its organizing principle: functional pathways as explicit diagnostic constraints rather than general-purpose graph traversal.
513
+
Recent work combines large language models with biomedical knowledge graphs. ESCARGOT \citep{Matsumoto2025} integrates LLMs with a dynamic ``Graph of Thoughts'' architecture and biomedical knowledge graphs for multihop reasoning tasks. While ESCARGOT reports effective graph-based reasoning in biomedical contexts, it operates as a general-purpose reasoning agent without explicit exclusion logic. The proposed system shares the emphasis on knowledge graph-guided reasoning but differs in its organizing principle: functional pathways as explicit diagnostic constraints rather than general-purpose graph traversal.
514
514
515
515
HealthGenie \citep{Gao2025} demonstrates knowledge-driven LLM integration for personalized health guidance. Its approach organizes knowledge graphs around user profiles and dietary recommendations---a symptom-centric (or need-centric) organization. In contrast, the proposed system organizes around biological functional pathways, enabling a mechanistic form of exclusion reasoning that is not typically explicit in symptom-centric architectures.
516
516
@@ -610,7 +610,7 @@ \section{Discussion}
610
610
\section{Conclusion and Future Work}
611
611
\label{sec:conclusion}
612
612
613
-
The functional pathway-centric knowledge graph represents a structurally distinct approach to differential-diagnosis research, using pathway-status evidence as explicit diagnostic constraints. The prototype implementation establishes prototype-level technical feasibility across the core components: data ingestion from six public databases, graph modeling with semantic edge types, binary and probabilistic exclusion reasoning, pattern detection, and interactive visualization.
613
+
The functional pathway-centric knowledge graph represents a structurally distinct approach to differential-diagnosis research, using pathway-status evidence as explicit diagnostic constraints. The prototype implementation demonstrates prototype-level technical feasibility across the core components: data ingestion from six public databases, graph modeling with semantic edge types, binary and probabilistic exclusion reasoning, pattern detection, and interactive visualization.
614
614
615
615
The core hypothesis---that pathway exclusion reduces the candidate gene space by $\geq30\%$ without false exclusions---is testable and constitutes the primary empirical target for future work.
616
616
@@ -633,7 +633,7 @@ \section*{Data and Software Availability}
AI-assisted tools (Claude/Anthropic and GPT/Codex) were used as non-authorial support tools during preparation of this manuscript, particularly for literature organization, code development support, text structuring, translation assistance, consistency checks, and LaTeX/PDF quality assurance. These tools did not serve as authors, co-authors, acknowledgement recipients, ground-truth sources, or independent validation authorities. The conceptual design, scientific argumentation, formal model development, final editorial decisions, and responsibility for all content lie exclusively with the author.
636
+
Generative AI tools were used as non-authorial support tools during preparation of this manuscript, particularly for literature organization, code development support, text structuring, translation assistance, consistency checks, and LaTeX/PDF quality assurance. These tools did not serve as authors, co-authors, acknowledgement recipients, ground-truth sources, or independent validation authorities. The conceptual design, scientific argumentation, formal model development, final editorial decisions, and responsibility for all content lie exclusively with the author.
Copy file name to clipboardExpand all lines: paper/SystemMedicine_v2_ger.tex
+3-3Lines changed: 3 additions & 3 deletions
Original file line number
Diff line number
Diff line change
@@ -631,10 +631,10 @@ \section*{Daten- und Softwareverfügbarkeit}
631
631
Der Quellcode des Prototyps, einschließlich Datenbankschema, Aufnahmepipelines, Ausschlussmodulen und grafischer Oberfläche, ist im \href{https://github.com/um-bruch/system-medicine}{öffentlichen GitHub-Repository} verfügbar. Das System integriert ausschließlich öffentliche Datenquellen; es werden keine Patientendaten verwendet oder benötigt.
0 commit comments