The METTL15P3 gene is a member of the METTL15 family and is characterized as a pseudogene. Here is a more detailed overview based on the provided information and additional research:

### Gene Overview
- **Gene Symbol**: METTL15P3
- **Gene Type**: Pseudogene
- **Location**: Chromosome location and sequence details can be determined through genome databases.

### Associated Genes
As a pseudogene, METTL15P3 does not typically produce a functional protein. However, its location and sequence may exhibit homology to genes involved in various cellular processes. Notable associated genes include:
- **METTL15**: This is a closely related functional gene that may share similar regulatory mechanisms.
- **METTL3**: Known for its role in RNA methylation and implicated in cancer progression.
  
While direct associations with other genes might not be well-documented for METTL15P3 due to its pseudogene status, further genomic context should be explored for potential interactions in gene networks.

### Aging and Age-Related Diseases
Currently, there are limited specific studies linking METTL15P3 directly to aging or age-related diseases due to its classification as a pseudogene. However, the METTL family is associated with methylation processes that can impact cellular regulation, potentially implicating influences on longevity or age-associated cellular functions. Further research may uncover indirect associations in the context of the functions of METTL15 and METTL3 in cellular aging or dysfunction.

### Drug Interactions
There are no known drugs or drug classes specifically interacting with METTL15P3 due to its pseudogene status. However, if related proteins from the METTL family are targeted by pharmaceuticals, this can provide insights into drugs that could indirectly affect pathways in which METTL15P3 participates.

### Pathways and Biological Processes
While METTL15P3 itself may not have specific functional pathways attributed to it as it is a pseudogene, genes in the METTL family, including METTL15, are generally involved in the following biological processes:
- **mRNA methylation**: This includes N6-methyladenosine (m^6A) modification, which plays a critical role in RNA stability, splicing, and translation.
- **Regulation of gene expression**: Methylation processes can affect transcriptional regulation both positively and negatively.
- **Cellular response to stress**: The methyltransferase family often plays a role in how cells respond to various stressors.

### Conclusion
The METTL15P3 gene, being a pseudogene, lacks direct functional roles typically attributed to protein-coding genes, yet it remains an important part of the broader context of RNA modifications and methylation processes that could influence genetic regulation, cellular functions, and potentially aging. Further research in its interactions and functional implications within the METTL family may reveal additional insights into its biological relevance.