The SEC13 gene encodes a protein that plays essential roles in cellular transport, particularly in the biogenesis of COPII-coated vesicles at the endoplasmic reticulum and as a component of the nuclear pore complex (NPC). Here is a more detailed overview of this gene in relation to your specific requests:

### 1. Associated Genes
While specific associations may vary based on experimental conditions and biological contexts, SEC13 is notably linked with several other genes involved in vesicle transport and the nuclear pore complex. These may include:
- **SEC12**: A guanine nucleotide exchange factor essential for COPII vesicle formation.
- **SEC23** and **SEC24**: Components of the COPII coat, which work with SEC13 in vesicle budding.
- **NUP120**, **NUP85**, and **NUP133**: Various nucleoporins that play roles in the structure and function of nuclear pore complexes.

### 2. Aging and Age-Related Diseases
Current research indicates that SEC13 and the processes it is involved in may relate to cellular aging and age-associated diseases. A few points of interest include:
- **Cellular Transport Defects**: Compromised vesicular transport mechanisms linked to aging can contribute to various degenerative diseases.
- **Neurodegenerative Disorders**: Research suggests that disrupted nuclear pore complex functionality can be a factor in diseases such as Alzheimer’s and Huntington's disease, as altered nucleocytoplasmic transport might result in aggregation of proteins like tau and huntingtin. 
- **Adipose Tissue Function**: As SEC13 is involved in the secretion of proteins from adipocytes, dysregulation may have implications for metabolic disorders often associated with aging, such as obesity and type 2 diabetes.

### 3. Drug Interactions
While there is no specific list of drugs that directly target SEC13 per se, any drugs impacting the endoplasmic reticulum stress response or those modulating vesicular trafficking could indirectly affect the function of the SEC13 protein. Some examples of drug classes that might interact or have implications include:
- **Pharmacological chaperones**: These may aid in the correct folding of proteins associated with the endoplasmic reticulum.
- **Small molecules affecting COPII assembly**: Research may investigate agents that can alter COPII function, although specific drugs targeting SEC13 activity are not well-characterized at this time.

### 4. Pathways and Biological Processes
SEC13 is involved in various key biological processes and pathways:
- **Endoplasmic Reticulum to Golgi Transport**: It plays a critical role in the ER-Golgi transport pathway by assisting in COPII vesicle assembly.
- **Nuclear Pore Complex Assembly and Function**: SEC13 is integral in forming the NPC, enabling the transport of molecules between the nucleus and the cytoplasm.
- **Vesicle-Mediated Transport**: Its functions in vesicle biogenesis and transport also tie into broader cellular trafficking mechanisms.

### Summary
Overall, SEC13 is a crucial gene involved in cellular transport mechanisms, with potential implications in aging and various metabolic or neurodegenerative diseases. Its associations with other genes tied to vesicular transport and nuclear pore complex integrity further underline its importance in maintaining cellular homeostasis. Research into pharmacological interactions and detailed functional analyses continues to deepen our understanding of SEC13's role in health and disease.