**HMGN3-AS1 Overview**  
The HMGN3-AS1 gene, also known as High Mobility Group N3 Antisense RNA 1, is an antisense long non-coding RNA (lncRNA) that plays a significant role in gene regulation and cellular processes. While specific details about this gene might be limited, here is a compilation based on existing knowledge and related findings.

### 1. Associated Genes
HMGN3-AS1 has been associated with several genes, particularly those involved in genomic regulation and cellular functions. Some key genes that have been identified in relation to HMGN3-AS1 include:

- **HMGN3**: The sense counterpart of HMGN3-AS1, which encodes a nuclear protein that binds to nucleosomes and influences chromatin structure, thus playing a role in the regulation of gene expression.

- **HMGN family genes**: Other members of the High Mobility Group N protein family, like HMGN1, HMGN2, and HMGN4, may also share functional associations.

If new studies have emerged, they may identify additional genes related to it; hence ongoing research could yield updated associations.

### 2. Aging and Age-Related Diseases
Research on non-coding RNAs like HMGN3-AS1 is ongoing, and while specific studies directly correlating HMGN3-AS1 with aging or age-related diseases might be limited, some insights might emerge from the roles of its associated genes:

- **Regulation of chromatin**: Chromatin remodeling can influence the aging process and age-related diseases, potentially impacting cellular senescence and cancer progression.

- **Cancer**: Some studies suggest that long non-coding RNAs involved in gene regulation could play roles in oncogenesis and tumor progression, which is often linked to aging.

Further research is required to ascertain more direct connections between HMGN3-AS1 and specific aging processes or conditions.

### 3. Drug Interactions
As of the last updates, specific drugs targeting HMGN3-AS1 directly have not been widely documented. However, it's essential to recognize that lncRNAs can influence pathways that many drugs target, including:

- **Chemotherapeutics**: Since HMGN3-AS1 may play a role in cancer cell regulation, some anticancer drugs might indirectly interact with signaling pathways affected by this gene.

- **Epigenetic Modulators**: Drugs targeting epigenetic modifications (like histone deacetylase inhibitors) may have downstream effects on the expression of lncRNAs such as HMGN3-AS1.

No explicit drug classes specific to HMGN3-AS1 have been identified in major databases.

### 4. Pathways and Biological Processes
HMGN3-AS1 is involved in several biological processes and pathways:

- **Gene Regulation**: As an antisense lncRNA, it is likely involved in the regulation of genes associated with chromatin dynamics and transcriptional regulation.

- **Chromatin Remodeling**: Given its relationship with the HMGN3 protein, it may be implicated in chromatin structure modulation, which is crucial for DNA accessibility and gene expression.

- **Cellular Response to Stress**: Long non-coding RNAs like HMGN3-AS1 often play roles in cellular responses to environmental stress, potentially influencing cellular integrity and longevity.

Further explorations may reveal additional pathways whereby HMGN3-AS1 plays a significant role.

### Conclusion
HMGN3-AS1 is an intriguing gene within the broader context of gene regulation and lncRNA functionality. Its associations, particularly with aging and disease mechanisms, as well as its interactions with other genetic elements and potential drug implications, continue to be an exciting area of research in contemporary genomics and molecular biology. Ongoing studies might provide deeper insights that clarify the biological and medical relevance of HMGN3-AS1.