The ACTRT3 gene, also known as actin, alpha tropomyosin-related protein 3, is part of the actin family of proteins and plays a role in various cellular processes.

### Additional Information:
1. **Associated Genes**: While specific associations may not always be documented directly, in the context of actin-related functions, genes such as ACTB (beta-actin), ACTG1 (gamma-actin), and other tropomyosin or actin-regulating proteins (like TPM1, TPM2) may have functional ties or interactions due to their involvement in the cytoskeletal system.

2. **Aging or Age-Related Diseases**: Research indicates that actin and its regulatory proteins are involved in cell motility, maintenance of cell shape, and signal transduction, which are critical in aging processes. Altered actin dynamics and structural integrity can impact cellular functions and contribute to age-related diseases such as sarcopenia (age-related muscle loss), neurodegenerative disorders, and cancer progression. However, specific publications directly linking ACTRT3 to aging or age-related diseases may be limited.

3. **Drug Interactions**: While there is no specific drug known to directly interact with ACTRT3, actin and its pathway modulating drugs, such as Cytochalasins (which disrupt actin polymerization), may indirectly affect the function of proteins associated with ACTRT3. Additionally, certain anti-cancer drugs that target the cytoskeleton might also impact the pathway involving this gene.

4. **Pathways and Biological Processes**: ACTRT3 is involved in several biological processes, including:
   - Actin filament organization
   - Cytoskeletal organization
   - Muscle fiber development
   - Cell migration
   - Regulation of cell shape and cellular responses to extracellular stimuli
   
The gene may also play a role in more specialized processes like spermatogenesis, given its predicted localization in the male germ cell nucleus.

### Conclusion:
In summary, ACTRT3 is a gene implicated in key processes involving the cytoskeleton, with potential indirect links to aging and disease through its effects on cell dynamics and interactions within actin-related pathways. The connections with associated genes, drugs, and biological pathways highlight its functional relevance in a variety of cellular contexts. Further research is essential to fully elucidate its roles in health and disease.