### DTD1-AS1 Gene Overview

**Gene Symbol:** DTD1-AS1  
**Location:** DTD1-AS1 is a long non-coding RNA (lncRNA) that is positioned at 7p15.2 on the human genome. 

### General Information
The DTD1-AS1 gene is classified as an antisense RNA, meaning that it is transcribed from the opposite strand of the neighboring DTD1 gene, which encodes the enzyme D-amino acid decarboxylase. Long non-coding RNAs like DTD1-AS1 have been implicated in various regulatory roles within the genome, including the modulation of gene expression and involvement in various cellular pathways.

### 1. Associated Genes
While specific associations can depend on various studies, here are some genes that have been noted in the literature to have potential interactions with DTD1-AS1:

- **DTD1 (D-amino acid decarboxylase)**: The neighboring protein-coding gene that is functionally related to DTD1-AS1.
- Additional genes in the context of certain studies may include genes involved in cellular processes influenced by D-amino acids, but detailed co-regulatory genes may not be well-characterized.

### 2. Aging or Age-Related Disease Associations
- Research indicates that long non-coding RNAs can play roles in the aging process. DTD1-AS1 may have implications in stress responses or metabolic processes, both of which are impacted by aging. 
- While specific studies relating DTD1-AS1 directly to aging phenotypes or age-related diseases are limited, its association with DTD1 suggests potential involvement in conditions where D-amino acids are implicated, such as neurodegenerative diseases.

### 3. Drug or Drug Classes
Currently, there is limited direct evidence specifically linking DTD1-AS1 with any drug or drug classes. However, because D-amino acids and their metabolism can influence various neurological processes, it is conceivable that compounds affecting D-amino acid pathways or related neurotransmitter systems might impact the expression or function of this gene indirectly. Further research might elucidate specific pharmacological interactions in the context of the diseases reflecting D-amino acid metabolism.

### 4. Pathways and Biological Processes
The DTD1-AS1 gene, being a long non-coding RNA, is involved in several biological processes, primarily mediated through its regulatory mechanisms:

- **Regulation of Gene Expression**: DTD1-AS1 may impact the transcriptional regulation of the DTD1 gene or other neighboring genes.
- **Cellular Stress Responses**: Long non-coding RNAs play roles in cellular responses to stress, and while specific pathways for DTD1-AS1 need further investigations, its potential regulation of D-amino acids could link it to stress response pathways.
- **Neuroactive metabolite synthesis**: Given its relation to DTD1, it may influence the pathways involving the synthesis and metabolism of D-amino acids, which are known to affect neurotransmission and have been implicated in neurodevelopment and neurodegenerative processes.

### Conclusion
In summary, DTD1-AS1 is a long non-coding RNA with potential roles in regulating the expression of the neighbor gene, DTD1, which may contribute to processes associated with aging and neurobiology. Further research is needed to fully elucidate its functional roles and drug interactions.