As of my last training data until October 2023, THCAT155 is not a well-characterized gene in the established databases like NCBI or UniProt, and specific details regarding it may be limited. However, I can help guide you on how to research the areas you're interested in regarding THCAT155 or similarly named genes.

### 1. Associated Genes
To find genes associated with THCAT155, you can look for functional genomic studies that often utilize methods like co-expression analysis or genetic interaction networks. Tools like STRING, BioGRID, or GeneAnnot can help identify genes that share pathways, physical interactions, or expression profiles with THCAT155. As I don't have specific gene associations listed for THCAT155, it's advisable to explore these databases for updates on any co-associated genes.

### 2. Aging and Age-Related Diseases
Currently, there are no widely accepted findings specifically linking THCAT155 to aging or age-related diseases in the literature. To investigate this further, you might consider searching academic publications that track gene expression changes with age or in models of aging and age-related pathologies. Keywords such as "longevity," "senescence," and "AGEs" combined with "THCAT155" may yield useful information.

### 3. Drug Interactions
Information regarding specific drugs or drug classes that interact with THCAT155 is also limited. Most genes involved in drug metabolism or drug action are typically well-characterized (e.g., CYP450 family). For THCAT155, checking databases like DrugBank or examining pharmacological literature could help uncover any associations with pharmaceuticals, focusing on whether THCAT155 is involved in any known metabolic pathways related to drug interactions.

### 4. Pathways and Biological Processes
For the biological processes and pathways involving THCAT155, conducting analysis using databases like the KEGG PATHWAY Database, Reactome, or Gene Ontology (GO) can provide insights into what pathways THCAT155 might influence. Look for any annotations related to signaling pathways, metabolic pathways, or cellular processes where this gene might play a role. 

Given its less well-defined nature, there might be ongoing research that could offer more data. A comprehensive search of recent literature using PubMed or Google Scholar with the gene name alongside relevant biological queries could provide newer insights into its functions, associations, and roles in biological processes and disease. 

For precise and current details, continual literature monitoring and database querying are recommended. Let me know if you need help with specific queries or more detailed explanations!