The LINC01791 gene, designated as a long intergenic non-protein coding RNA, is involved in a variety of biological processes predominantly through its regulatory functions in gene expression. Below is an expanded overview, incorporating the specific requests related to associations with other genes, aging, drug interactions, and biological pathways.

### 1. Other Associated Genes
While LINC01791’s specific associations might not be extensively documented, long non-coding RNAs (lncRNAs) typically interact with multiple gene networks. Potential associations might include genes related to chromatin remodeling, transcriptional regulation, or pathways of cellular stress response. However, specific gene relationships can vary considerably depending on cell type and physiological conditions. Notable lncRNA interactions usually involve:
- **Regulatory genes** integral to transcription machinery (e.g., various transcription factors).
- **Protein-coding genes** involved in cellular signaling pathways.
  
More detailed investigation in specific studies or databases like GeneCards or functional databases may yield further insights.

### 2. Aging and Age-Related Diseases
Research into LINC01791's role in aging or age-related diseases is limited and would typically rely on broader evolutionary biology studies concerning long non-coding RNAs. Generally, lncRNAs have been implicated in the regulation of cellular senescence, inflammation, and tissue homeostasis, which are critical processes in aging. Investigations into the lncRNA landscape often reveal associations with:
- **Alzheimer's Disease**: lncRNAs can modulate amyloid precursor protein processing and tau pathology.
- **Cardiovascular Diseases**: Involvement in the regulatory networks related to vascular aging and atherosclerosis has also been observed.
  
Any emerging research on LINC01791’s specific implications in these contexts should be closely monitored.

### 3. Drug Interactions
Currently, there is no well-documented information regarding specific drugs or drug classes that directly interact with LINC01791. However, it is known that certain lncRNAs can influence the effectiveness of therapies, particularly in cancer- and inflammation-related contexts. This could indirectly implicate LINC01791 in modulating responses to conventional anti-cancer drugs or anti-inflammatory agents. Future researches may elucidate more direct interactions.

### 4. Pathways and Biological Processes
LINC01791 may engage in a multitude of biological pathways, as is characteristic of other lncRNAs. Some potential pathways and processes include:
- **Transcriptional Regulation**: LINC01791 could function in the modulation of transcription factors or chromatin remodeling complexes, influencing gene expression.
- **Cell Cycle Regulation**: lncRNAs are often involved in cell cycle control, which could be essential for cellular proliferation, especially in stem cells or during tissue regeneration.
- **Immune Response**: As with many lncRNAs, LINC01791 might also play a role in responding to cytokine signaling, thus potentially influencing the immune response. 

In conclusion, while LINC01791 presents significant interest due to its lncRNA classification, ongoing research is crucial for elucidating its specific functions, interactions, and implications in aging or related diseases. It is recommended to keep abreast of developments in databases, recent literature, and experimental findings that may further delineate these aspects.