### PCDH9-AS3 Gene Overview

**Gene Symbol**: PCDH9-AS3  
**Description**: PCDH9-AS3 (protocadherin 9, antisense RNA 3) is a long non-coding RNA (lncRNA) that is associated with the PCDH9 gene. lncRNAs play diverse roles in gene expression regulation and contribute to various biological processes.

### 1. Associated Genes
While the summaries do not specify additional genes, PCDH9-AS3 is closely associated with its sense partner gene, **PCDH9**. The PCDH (protocadherin) family includes several genes involved in cell-cell adhesion in the nervous system, which is crucial for neuronal function and development.

### 2. Aging and Age-Related Diseases
Current research indicates a potential involvement of lncRNAs, including PCDH9-AS3, in age-related diseases, though specific studies directly linking PCDH9-AS3 to aging parameters or age-related conditions are limited. However, lncRNAs have been recognized to influence cellular processes related to aging, such as cellular senescence, inflammation, and neurodegeneration. Specific investigations into PCDH9-AS3's role in these contexts would be beneficial for understanding its potential implications in aging and related pathologies.

### 3. Drug Interactions
Currently, there is no comprehensive database indicating specific drugs or drug classes that interact with PCDH9-AS3. As a long non-coding RNA, it is more likely to be involved in regulating the expression of genes that could respond to drugs rather than directly interacting with pharmaceuticals.

### 4. Pathways and Biological Processes
PCDH9-AS3, being a long non-coding RNA, can be involved in various biological processes including:
- **Gene Regulation**: By modulating transcription and chromatin remodelling.
- **Cell-Cell Interaction**: Since it is associated with the PCDH9 gene, it may play a role in neuronal cell adhesion and signaling pathways.
- **Developmental Processes**: Particularly in the context of the nervous system due to the protocaldeherin family's involvement in neural cell function.

While specific pathways involving PCDH9-AS3 have not been extensively detailed in public databases, further research may uncover more defined pathways and roles in physiological and pathological conditions. 

In summary, PCDH9-AS3 is an important lncRNA that merits further exploration to elucidate its precise functions and interactions, especially in the context of aging and disease mechanisms.