The **IRGQ** gene (Immunity-Related GTPase Family, Q) encodes a protein that is a member of the dynamin-like GTPase superfamily, specifically part of the IRG family, which is involved in immune responses. Here is a detailed overview based on your request:

### 1. Associated Genes
While the provided summaries do not specifically mention other genes, IRGQ is a member of the broader immunity-related GTPase family. This family includes several other related genes, particularly those that play roles in immune defense mechanisms. Some associated genes may include:
- **IRGA6** (Immunity-Related GTPase A6)
- **IRGB6** (Immunity-Related GTPase B6)
- **IRGM** (Immunity-Related GTPase M)

These genes often share similar functions related to cytokine signaling, autophagy, and clearance of pathogens.

### 2. Aging and Age-Related Diseases
As of October 2023, specific direct associations between the IRGQ gene and aging or age-related diseases have not been extensively documented. However, IRG proteins, including IRGQ, have been implicated in immune responses and pathogen clearance, which can impact age-related immune function (inflamm-aging) or susceptibility to infections in older adults. Further studies may reveal more about their roles in aging and longevity.

### 3. Drug Interactions
As of now, there are no specific drugs or drug classes that are widely known to interact directly with the IRGQ gene or its protein product. However, since IRGQ is involved in immune responses, it might be indirectly influenced by immunomodulatory therapies or agents used to treat infectious diseases or autoimmune conditions. Further pharmacogenomic studies may shed light on potential interactions.

### 4. Pathways and Biological Processes
The IRGQ gene is involved in several biological processes, primarily relating to immune system functions:
- **Immune Response**: Plays roles in the innate immune response, particularly in the recognition and elimination of intracellular pathogens.
- **GTP-binding Activity**: The GTPase activity is critical for nucleotide binding and hydrolysis, which may influence cellular processes such as membrane dynamics during immune response activation.
- **Inflammation**: May be involved in inflammatory processes, considering its role in the immune system.

**Biological Pathways**:
- Pathways that involve other immunity-related GTPases may also involve IRGQ, especially those related to the modulation of the immune response and interferon signaling pathways.

In summary, the IRGQ gene is critical for immune responses, particularly against intracellular pathogens. However, ongoing research may shed further light on its functions and associations, especially in relation to aging, drug interactions, and specific biological pathways.