The **RPSAP64** gene (Ribosomal Protein S16 Antisense RNA 64) is a long non-coding RNA (lncRNA) that has garnered attention for its association with various biological processes and potential implications in disease. Here is a detailed overview of the gene, including the requested information:

### 1. Associated Genes
While specific interactions may not be as well-documented for long non-coding RNAs such as RPSAP64, it is known to be associated with **RPS16**, which encodes ribosomal protein S16. RPSAP64 may play a role in the regulation of the expression of the RPS16 gene through mechanisms such as RNA interference or chromatin remodeling.

### 2. Aging or Age-Related Diseases
Current research suggests a potential involvement of lncRNAs, including RPSAP64, in the process of aging and age-related diseases. While specific studies directly linking RPSAP64 to aging mechanisms or diseases such as Alzheimer’s or cardiovascular diseases may be limited, lncRNAs have been increasingly recognized for their roles in cellular senescence, inflammation, and stress response, all of which are crucial in the context of aging. Investigating RPSAP64's specific function in these pathways is a potential area of future research.

### 3. Drug or Drug Classes Interacting with RPSAP64
As RPSAP64 is a lncRNA, direct interactions with specific drugs are less common compared to protein-coding genes. However, lncRNAs can influence drug responses through regulatory pathways. Some studies in similar lncRNAs suggest that targeting them may affect the pharmacodynamics of certain cancer treatments or other therapeutic agents. Further studies would be needed to characterize any specific drugs or drug classes interacting with RPSAP64.

### 4. Pathways and Biological Processes
RPSAP64 is involved in several biological processes, particularly through its potential regulatory roles:

- **Gene Regulation:** As an antisense RNA, it may influence the transcriptionally active state of nearby genes, particularly ribosomal protein genes.
- **Cell Proliferation and Growth:** lncRNAs are often implicated in cellular growth, differentiation, and response to stress, which may correlate with pathways important in various cancers.
- **Ribosome Biogenesis:** Given its association with ribosomal proteins, it may be involved in ribosome assembly and function.
- **Regulatory Networks:** RPSAP64 might participate in complex regulatory networks that affect gene expression profiles during cell cycle progression, apoptosis, and other cellular processes.

### Conclusion
RPSAP64 is an intriguing gene with potential regulatory roles in cellular function and disease. While direct associations with aging, specific drugs, and pathways may still be under investigation, the lncRNA landscape continues to evolve, revealing their significance in numerous biological contexts. Further studies could unveil additional roles and therapeutic potentials of RPSAP64.