The HNRNPA1P45 gene is a member of the heterogeneous nuclear ribonucleoproteins (hnRNPs) family, specifically relating to the HNRNPA1 gene. Below is the detailed information regarding the HNRNPA1P45 gene, based on your requirements:

### Summary of HNRNPA1P45 Gene:
- **Gene Symbol**: HNRNPA1P45
- **Gene Type**: Pseudogene
- **Location**: Located on chromosome 14.

### 1. Associated Genes:
While HNRNPA1P45 is primarily recognized as a pseudogene related to HNRNPA1, its expression might reflect or be associated with other genes involved in RNA binding and processing. Some related genes in the hnRNP family include:

- **HNRNPA1**: The primary gene it is associated with, which encodes for a protein involved in mRNA processing.
- **HNRNPU**: Another member of the hnRNP family that is involved in various post-transcriptional modifications.
- **HNRNPH1**: Known for its role in splicing and regulation of gene expression.

Because HNRNPA1P45 is classified as a pseudogene, it's important to note it may not have direct interactions or functional associations like a typical gene.

### 2. Aging and Age-Related Diseases:
Information directly linking HNRNPA1P45 to aging or age-related diseases specifically is limited due to its classification as a pseudogene. However, the related HNRNPA1 gene has been implicated in:

- **Cellular senescence**: Changes in hnRNPs, including HNRNPA1, have been associated with the regulation of genes involved in senescence pathways.
- **Neurodegenerative Diseases**: Dysregulation of RNA processing proteins is a feature seen in diseases like Alzheimer's, thus indirectly implying roles in age-related pathologies.
  
No specific studies directly attribute HNRNPA1P45 to aging processes, but its higher-level functions might play an indirect role.

### 3. Drug Interactions:
As HNRNPA1P45 is a pseudogene, there are no specific drugs or drug classes directly targeting this gene. However, potential drugs associated with HNRNPA1 may provide insights into compounds that might indirectly overlap, particularly in studies examining RNA processing and splicing. Some classes to look at might include:

- **Antisense oligonucleotides**: These could target and modify expression of hnRNP-associated genes.
- **Small molecules**: Drugs that modulate RNA splicing dynamics may also have an effect on genes closely related to HNRNPA1.

### 4. Pathways and Biological Processes:
HNRNPA1P45 does not have defined pathways as it functions mainly as a pseudogene. However, associated pathways related to its parent gene, HNRNPA1, include:

- **mRNA Splicing**: Both transcriptional and post-transcriptional gene regulation.
- **RNA Processing**: Involvement in various steps of RNA maturation and modification.
- **Nuclear Transport**: Potential roles in exporting RNA from the nucleus to the cytoplasm.

In conclusion, while HNRNPA1P45 is a pseudogene with limited direct functional insights, its connections through HNRNPA1 and related hnRNP family members highlight its importance in nucleic acid metabolism and potential relevance to cellular aging processes and age-related diseases. Further research may elucidate more precise interactions and functional roles.