### DPP9-AS1 Gene Overview

**Gene Symbol:** DPP9-AS1  
**Description:** DPP9-AS1 is a long non-coding RNA (lncRNA) associated with the DPP9 gene, which encodes a dipeptidyl peptidase enzyme involved in protein processing. Though DPP9-AS1 itself does not encode a protein, it plays regulatory roles in gene expression and may be involved in several biological processes.

### 1. Associated Genes
The DPP9-AS1 gene is particularly associated with:

- **DPP9:** Since DPP9-AS1 is an antisense RNA to the DPP9 gene, it may regulate DPP9 expression.
- **Other lncRNAs:** DPP9-AS1 may have interactions with various lncRNAs, but specific other genes may include those involved in regulatory networks overlapping with immune response, inflammation, and cancer pathways.
- **Immune-related Genes:** Given the association of DPP9 with immune regulation, DPP9-AS1 would potentially associate indirectly with genes involved in immune response, like those in the cytokine signaling pathways.

### 2. Aging and Age-Related Diseases
Although direct studies specifically linking DPP9-AS1 with aging or age-related diseases are sparse, its association with the DPP9 gene suggests influence on pathways relevant to these conditions:

- **Cancer:** DPP9 has been implicated in processes like apoptosis and immune responses, which can be relevant in cancer development and progression.
- **Inflammation:** DPP9 is also involved in inflammatory responses, and chronic inflammation is a common feature of aging and age-related diseases.
- **Neurodegenerative Diseases:** There may be an indirect correlation, as lncRNAs have been studied in contexts of neurodegeneration.

### 3. Drug Interactions
Currently, there are no specific drugs or drug classes directly known to interact with DPP9-AS1, primarily because it is a non-coding RNA without direct pharmacological targeting. However, it may influence the effectiveness of treatments targeting the DPP9 enzyme:

- **DPP Inhibitors:** Drugs that inhibit DPP enzymes may have downstream effects that could indirectly involve DPP9-AS1 regulation.
- **Cancer Therapies:** Given its potential role in cancer pathways due to its association with DPP9, therapies targeting relevant pathways involve modulation of gene expression impacted by lncRNAs like DPP9-AS1.

### 4. Pathways and Biological Processes
DPP9-AS1 is involved in several biological processes and pathways, including:

- **Regulation of Gene Expression:** As a lncRNA, DPP9-AS1 may bind to chromatin and modulate the transcription of neighboring or related genes, particularly the DPP9 gene.
- **Immune Response Pathways:** Through regulating DPP9 and associated factors, it may play a role in modulating immune responses.
- **Cell Cycle Regulation:** Its potential influence on gene expression may intersect with cell cycle regulation, although specific details are less characterized.
- **Apoptosis Pathways:** Given DPP9's role in apoptosis, DPP9-AS1 may participate in the regulation of this important cellular process.

### Conclusion
The DPP9-AS1 gene represents a significant area of interest, particularly in connection with its parent gene, DPP9. Its role as a long non-coding RNA underscores the complexity of gene regulation and its potential implications in aging, inflammation, and cancer. Further studies are required to elucidate its precise biological functions and potential therapeutic implications.