The MIR100HG gene, also known as "MIR100 Host Gene," is associated with producing long non-coding RNAs (lncRNAs) that have crucial roles in the regulation of cell proliferation. Here is a more detailed overview including your requests:

### 1. Associated Genes
MIR100HG is primarily known for its association with several microRNAs (miRNAs) that it harbors, particularly:
- **miR-100**
- **miR-125b**
- **miR-99a**

These miRNAs can participate in various regulatory networks and pathways influencing cell growth and differentiation. Additionally, there are associations with oncogenes and tumor suppressor genes due to its involvement in cancer-related processes. However, explicit associations beyond the miRNAs remain less characterized and further research is needed for a comprehensive list.

### 2. Aging and Age-Related Diseases
Research has implicated MIR100HG in processes related to aging:
- **Cellular Senescence:** Long non-coding RNAs, including those produced by MIR100HG, can regulate pathways related to cellular senescence, which is a well-known factor in aging and the development of age-related diseases.
- **Cancer:** Given that MIR100HG is associated with cell proliferation, dysregulation of this gene can contribute to oncogenesis, a process that becomes increasingly prevalent with age. Specifically, its expression has been linked to various types of cancers, suggesting a role in tumorigenesis that often correlates with aging.
- **Regenerative Biology:** MIR100HG's lncRNAs may also play roles in tissue regeneration, which diminishes with age.

### 3. Drug Interactions
While there are no specific drugs directly targeting MIR100HG, the associated miRNAs (miR-100 and miR-125b) have been studied in the context of drug effects. Some classes of drugs that may impact the expression of these miRNAs include:
- **Chemotherapeutic Agents:** Certain anticancer therapies can modulate the expression of miR-100 and potentially affect the biological roles of MIR100HG indirectly.
- **Antioxidants:** Some studies suggest that oxidative stress can influence the expression of lncRNAs. Drugs known to have antioxidant properties may, therefore, exert effects on MIR100HG-related pathways.
However, comprehensive pharmacological interactions specifically targeting MIR100HG are an area requiring more targeted investigation.

### 4. Pathways and Biological Processes
MIR100HG is involved in several critical pathways and biological processes, including:
- **Cell Cycle Regulation:** It plays a role in regulating genes associated with cell proliferation and cycle progression.
- **Apoptosis:** Regulation of pathways that determine cell survival versus apoptosis can also occur via MIR100HG.
- **Developmental Processes:** The gene is implicated in various developmental processes due to its role in the regulation of growth factors and cell signaling pathways.
- **Oncogenesis:** Its interaction with cancer-related signaling pathways has been shown to affect tumor growth and metastasis.

### Summary
MIR100HG is a long non-coding RNA gene that is intricately involved in regulating cell proliferation and various biological processes related to aging and cancer. Its relationships with specific miRNAs, interaction with cellular pathways, and the impact of pharmacological agents, all underscore its significance in both normal physiology and disease states. Further research could unveil more details about its role in health and disease, particularly concerning its age-related implications.