The gene **OR2A1-AS1** is identified as an antisense RNA to the olfactory receptor gene OR2A1. Antisense RNAs are non-coding RNA molecules that are transcribed from the opposite strand of a gene and can play regulatory roles in gene expression.

### 1. Associated Genes
While the summaries provided by NCBI and UniProt may not list specific associated genes, OR2A1-AS1 is closely associated with its sense partner **OR2A1**, which encodes an olfactory receptor protein. Given the role of OR2A1 in the olfactory system, it is likely to be functionally linked to other olfactory receptor genes, although detailed associations with other genes have not been extensively characterized.

### 2. Aging and Age-related Diseases
Specific details linking OR2A1-AS1 to aging or age-related diseases are sparse. However, as olfactory receptors, including OR2A1, are implicated in sensory perception, there could be indirect associations with age-related olfactory decline or neurodegenerative diseases that affect sensory processing. Further research would be needed to establish a more definitive relationship.

### 3. Drug Interactions
Currently, there is limited information regarding specific drugs or drug classes that interact directly with OR2A1-AS1. As an antisense RNA primarily involved in the regulation of its corresponding gene (OR2A1), its direct interaction with pharmaceutical compounds has not been well documented. However, research into olfactory receptors generally reveals potential interactions with various ligands (odorants), which may also tie into pharmacology and scent-related therapies.

### 4. Pathways and Biological Processes
OR2A1-AS1, as an antisense RNA, is primarily involved in regulatory mechanisms affecting the expression of its associated olfactory receptor gene, OR2A1. Some biological processes in which the olfactory receptor genes participate include:

- **Olfactory Signal Transduction**: OR2A1 receptors participate in the detection of odorants and the subsequent signaling cascade that leads to the perception of smell.
- **Sensory Perception of Smell**: The primary biological role of the OR2A1 and its associated antisense RNA is in the sensory function, particularly related to olfaction.

Given the role of olfactory receptors in health and disease, it is plausible that OR2A1-AS1 may participate broadly in processes related to sensory biology and its pathophysiology.

### Conclusions
In summary, while OR2A1-AS1 is understood primarily in relation to its sense partner OR2A1, research into its associations with other genes, drugs, aging, and specific biological processes is ongoing. Further studies are warranted to dissect its role in regulation and pathology comprehensively.