The PSPC1P2 gene (PSPC1 Pseudogene 2) is a pseudogene located on chromosome 1 and is a part of the PSPC1 (paraspeckle component 1) gene family. As a pseudogene, PSPC1P2 is generally not expressed or does not encode a functional protein. Here is a more detailed summary based on your request:

### 1. Associated Genes:
PSPC1P2 is closely related to other members of the PSPC1 gene family. While specific interaction details may not be thoroughly characterized due to its pseudogene nature, the following genes are typically related:

- **PSPC1**: The functional counterpart; involved in various cellular processes.
- **PSPC1P1**: Another pseudogene closely related to PSPC1.

### 2. Aging and Age-Related Diseases:
There is limited direct information available specifically linking PSPC1P2 with aging or age-related diseases. However, genes within the PSPC1 family may have implications in cellular processes such as RNA metabolism, localization, or regulation that could influence aging indirectly. Research into related genes may provide insights into their roles in senescence or cellular decline relevant to age-related conditions, but specific studies directly linking PSPC1P2 to aging are not abundant.

### 3. Drug Interactions:
As of now, there are no known direct drugs or drug classes that interact specifically with PSPC1P2 due to its classification as a pseudogene. The focus on functionality in therapeutic contexts is generally directed toward its functional counterpart, PSPC1, which may contribute to pathways affected in certain diseases.

### 4. Pathways and Biological Processes:
While PSPC1P2 itself does not have characterized pathways due to its pseudogene status, the PSPC1 gene (which is functionally related) is involved in several biological processes, including:

- **RNA Processing**: Functions in the assembly of nuclear bodies and may be involved in pre-mRNA splicing.
- **Gene Expression Regulation**: Participates in the regulation of nuclear architecture and gene expression dynamics.
- **Stress Response**: Involvement in cellular responses to stress may also be a function of the PSPC1 protein, which could include factors related to aging.

Given the pseudogene nature, PSPC1P2 lacks extensive specific functional annotations, and studies typically focus on its more active counterparts to derive biological significance.

### Conclusion:
In summary, PSPC1P2 is a pseudogene related to the PSPC1 gene, with limited information concerning its functional roles in aging, drug interactions, and specific biological pathways. For a more comprehensive understanding, researchers often look to the functional genes in the family, especially PSPC1.