The VGLL3 gene (Vestigial Like Family Member 3) encodes a protein that is part of the VGLL family, which consists of coactivators that are involved in various critical biological processes, particularly in the regulation of gene expression.

### Additional Information

1. **Associated Genes**:
   - VGLL3 has been studied in the context of several other genes, particularly those involved in the transcriptional regulation and development. Some of the associated genes include:
     - TEF (TEF family of transcription factors) as it functions as a coactivator for TEFs.
     - Other members of the VGLL family such as VGLL1 and VGLL2.
     - Genes involved in pathways linked to muscle development (such as MYOD1) and cell differentiation processes.

2. **Aging and Age-Related Diseases**:
   - While specific studies may still be emerging, VGLL3 has been implicated in processes that can influence aging and age-related diseases. Its role in transcriptional regulation may affect cellular stress responses, apoptosis, and differentiation, which are critical for aging. Dysregulation of VGLL3 may potentially relate to aging-related disorders such as:
     - Sarcopenia (age-related muscle loss), due to its involvement in muscle gene regulation.
     - Some studies suggest that aberrant VGLL3 expression may correlate with cancer progression in older adults, as regulation of transcription can be involved in tumorigenesis.

3. **Drug Interactions**:
   - Currently, there are no specific drugs directly targeting VGLL3 known in major databases. However, VGLL3's role in cancer suggests it may be influenced by drugs targeting common pathways in cancer biology, such as those inhibiting transcription factors or modifying the epigenetic landscape. There are classes of drugs (like HDAC inhibitors) that could be hypothesized to affect VGLL3 function indirectly through modulation of transcriptional coregulators.

4. **Pathways and Biological Processes**:
   - **Pathways**:
     - VGLL3 is involved in pathways regulating transcription from RNA polymerase II promoter, particularly in muscle development and differentiation pathways.
     - It is also implicated in developmental processes through its interaction with the TEF pathway, affecting various gene expression programs.

   - **Biological Processes**:
     - Regulation of transcription by RNA polymerase II.
     - Muscular development and growth.
     - Potential roles in developmental biology and differentiation processes.
     - Participation in cellular response mechanisms to stimuli.

### Summary
VGLL3 acts as a coactivator in various regulatory pathways and processes, particularly important in muscle biology and possibly in aging and tumorigenesis. Further studies are needed to clearly elucidate its interactions, specific drug influences, and implications in age-related conditions.