### 1. Associated Genes:
The PMM1 gene is primarily associated with genes that are involved in glycosylation pathways and carbohydrate metabolism. Some of these include:

- **PMM2**: Another phosphomannomutase that has important roles in glycosylation. Mutations in PMM2 are linked to congenital disorders of glycosylation (CDG).
- **GMPPB**: Gene involved in GDP-mannose synthesis, essential for N-linked glycosylation.
- **DOLK**: Involved in the biosynthetic pathway that generates dolichol phosphate and dolichol phosphate mannose required for glycosylation processes.

### 2. Aging and Age-Related Diseases:
While specific research directly linking PMM1 to aging or age-related diseases is limited, alterations in glycosylation processes have been implicated in various age-related conditions. Since PMM1 plays a crucial role in the N-linked glycosylation and synthesis of glycoproteins:

- Altered glycosylation patterns have been observed in age-related diseases such as neurodegenerative disorders (e.g., Alzheimer’s disease) and cardiovascular diseases.
- Impaired carbohydrate metabolism may also contribute to metabolic disorders that manifest with aging, such as diabetes.

### 3. Drug Interactions:
As of the current knowledge base, there are no specific drugs that are directly indicated to target PMM1. However, drugs that act on glycosylation pathways, either through influencing substrates or through mechanisms related to glycoprotein synthesis, may indirectly affect PMM1 activity. Further investigation into specific pharmacological agents, such as:

- **Glucosamine**: has implications in glycosylation pathways but may not directly interact with PMM1.
- **Sodium Oligomannate**: A drug that has been studied for neurodegenerative disorders and may affect glycosylation generally.

### 4. Pathways and Biological Processes:
PMM1 is involved in several critical biological pathways and processes, including:

- **Glycogenesis**: The synthesis of glycogen, which involves not only carbohydrate metabolism but also the roles of glycosyl transfer reactions.
- **N-glycan biosynthesis**: As part of the glycosylation process, PMM1 contributes to the formation of essential glycoproteins.
- **Glycosaminoglycan biosynthesis**: Associated with the synthesis of various important biomolecules that can be affected by glycosylation alterations.
- **Cell signaling**: Glycoproteins involved in signaling often depend on proper glycosylation provided by the products of PMM1.

In summary, the PMM1 gene is critically involved in carbohydrate metabolism, particularly in the synthesis of GDP-mannose essential for glycosylation processes, and while direct implications in aging are not exhaustive, its role in glycoprotein synthesis positions it as potentially significant in age-related biological processes.