The **PPP4R3B-DT** gene is a long non-coding RNA (lncRNA) that has been identified as a gene with potential regulatory functions. Due to its classification as a long non-coding RNA, it may play roles in various genetic regulatory processes, though specific details about its functions may still be under research.

### Gene Associations
1. **Associated Genes**: 
   - The PPP4R3B-DT gene is associated with the **PPP4R3B** gene itself, which encodes a regulatory subunit of protein phosphatase 4. This subunit is involved in various cellular processes, including the regulation of cell signaling. The PPP4R3B-DT might also be linked to other genes in pathways involving protein phosphatases or signal transduction, but specific associations beyond PPP4R3B require further exploration in context to study interactions and co-expression.
  
2. **Aging or Age-Related Diseases**:
   - While specific literature directly linking PPP4R3B-DT to aging and age-related diseases may be limited, lncRNAs are increasingly recognized for their roles in cellular senescence, apoptosis, and the regulation of genes involved in aging processes. It is essential to consult updated studies that explore the exact involvement of PPP4R3B-DT in these pathways. As research evolves, it may reveal more explicit connections to age-related phenotypes or diseases such as cancer or neurodegenerative conditions.

3. **Drug Interactions**:
   - As of now, the pharmacological interactions specific to PPP4R3B-DT have not been well-characterized; however, interactions with small molecules or drug classes targeting related pathways (e.g., those affecting protein phosphatases or cellular signaling pathways) may occur. High-throughput screens and ongoing research may help elucidate any potential drug interactions in the future.

4. **Pathways and Biological Processes**:
   - PPP4R3B-DT may be involved in pathways related to **cell signaling**, particularly those influenced by protein phosphatases. Its potential roles might also include involvement in cellular stress responses, DNA repair, and influences on gene expression through chromatin remodeling.
   - Specifically, lncRNAs such as PPP4R3B-DT can act in various ways, including:
     - **Transcriptional regulation**: Modulating the activity of transcription factors or chromatin-modifying complexes.
     - **Post-transcriptional regulation**: Impacting mRNA stability or translation.
     - **Interacting with signaling pathways**: Modulating the effects of kinases and phosphatases involved in cell cycle progression and survival.

### Conclusion
As a long non-coding RNA, PPP4R3B-DT's functional characterization is still in progress, and deeper investigations are warranted, particularly concerning its physiological roles and clinical implications regarding aging and associated diseases. Future studies are likely to enhance our understanding of this gene's significance in various biological contexts.