### WDR55 Gene Overview

The **WDR55** gene (WD repeat domain 55) encodes a nucleolar protein implicated in the processing of ribosomal RNA (rRNA) and is essential for organogenesis. Its primary location is in the nucleolus and nucleoplasm, where it is predicted to play a crucial role in ribosome biogenesis by modulating rRNA synthesis.

### 1. Associated Genes
While the specific association of WDR55 with other genes is not always clearly defined, it is known to functionally relate to genes involved in ribosome biogenesis and nucleolar assembly. Some genes that may be associated with WDR55 through pathways related to ribosome assembly and nucleolar functions include:

- **RPL (Ribosomal Protein Genes)** - A group of genes that encode ribosomal proteins which are critical for ribosome formation and function.
- **NPM1 (Nucleophosmin)** - A nucleolar protein involved in rRNA processing and ribosome biogenesis.
- **FBL (Fibrillarin)** - Another nucleolar protein related to the processing of pre-rRNA.
  
### 2. Aging and Age-Related Diseases
There is limited direct research specifically linking WDR55 to aging or age-related diseases in the publicly available data; however, due to its integral role in ribosome biogenesis, it may play an indirect role in cellular senescence and organismal aging. Ribosome biogenesis has been suggested to be closely linked with cellular growth, proliferation, and aging processes, often highlighted in studies related to age-related diseases such as cancer and neurodegenerative disorders. Dysregulation of ribosome biogenesis can contribute to aging pathophysiology.

### 3. Drug Interactions
As of the latest information:
- Specific drugs or drug classes directly interacting with WDR55 have not been extensively documented. The gene may be indirectly influenced by compounds that affect general nucleolar functions or ribosome assembly; however, there are no prominent drug interactions that are widely recognized. Further research may be necessary to explore potential pharmacological connections.

### 4. Pathways and Biological Processes
WDR55 is involved in several critical biological pathways, notably:

- **rRNA Processing**: Essential for the modification and maturation of rRNA, necessary for ribosome assembly.
- **Ribosome Biogenesis**: Involved in the formation of ribosomes, which are essential for protein synthesis.
- **Nucleolar Organization**: Plays a role in maintaining the structural integrity and functional compartmentalization of the nucleolus.

In terms of biological processes, WDR55 contributes to:

- **Cell Growth and Proliferation**: As it is linked to ribosome production.
- **Organogenesis**: It has a central role during the development of organs, reflecting its importance in growth and development. 

### Summary
The WDR55 gene is a nucleolar protein crucial for rRNA processing, modulating ribosome biogenesis, and involved in processes related to organogenesis. Its association with other ribosomal protein genes and potential indirect link to aging processes and ribosome-related age-related diseases highlight its significance, although further studies are required to illuminate its role in pharmacological contexts and specific aging-related pathways.