The PKD1P2 gene, or Polycystic Kidney Disease 1 Like 2, is a member of a family of genes that play a role in kidney function and development. Based on your request, here’s a detailed overview including the specific aspects you've outlined.

### Overview of PKD1P2
- **Gene Symbol:** PKD1P2
- **Location:** PKD1P2 is located on chromosome 16p13.3 and is a pseudogene closely related to the PKD1 gene, which is directly involved in autosomal dominant polycystic kidney disease (ADPKD). 

### 1. Genes Associated with PKD1P2
While PKD1P2 is closely associated with PKD1, there may be other related genes and pathways of interest:
- **PKD1:** This gene is directly implicated in ADPKD.
- **PKD2:** Another gene associated with ADPKD that may share pathways or processes with PKD1P2.
- **OtherGenes:** Genes like **INVS** (inversin), **FPC1** (fibrocystin), and various up-regulators and down-regulators of renal tubular proliferation may also be functionally connected to PKD1P2 or play roles in similar biological processes.

### 2. Aging or Age-Related Diseases
- While specific studies directly linking PKD1P2 to aging or age-related diseases may be limited, its association with polycystic kidney disease could indirectly relate to age, as ADPKD often manifests and progresses over time. Patients with ADPKD commonly experience renal decline and complications as they age, particularly from cyst growth and renal insufficiency.

### 3. Drug Interactions
- There are currently no specific drugs or drug classes that are exclusively known to target PKD1P2. However, agents used in the treatment of polycystic kidney disease, such as:
  - **Tolvaptan** - An oral vasopressin receptor antagonist that has been shown to slow kidney function decline in ADPKD,
  - **Diuretics** - Sometimes prescribed for managing complications from cyst formation, may affect renal pathways related to PKD1P2.
- Further research might elucidate more direct pharmacological interactions with this pseudogene or its functional derivatives in therapeutics.

### 4. Pathways and Biological Processes
- **Developmental Biology:** PKD1P2 is involved in kidney and renal development and function. It may play a regulatory role in renal tubular structure and function.
- **Cell Growth and Proliferation:** Participates in pathways regulating cell growth, proliferation, and possibly apoptosis in kidney cells.
- **Cilia-related Pathways:** Given the functional similarities to PKD1, PKD1P2 might be involved in pathways related to primary cilia, which are crucial in cell signaling and development.
- **Signal Transduction:** May participate in intracellular signaling pathways that impact renal function.

### Conclusion
PKD1P2 is a pseudogene that shares significant homology with PKD1 and is hypothesized to influence renal physiology, particularly in the context of polycystic kidney disease. The relationship to aging and drug interactions is more indirect, necessitating further investigation to clarify its clinical implications, particularly within the context of kidney health and disease progression.

For the latest and most specific information, always refer to research articles and databases as new discoveries and insights can emerge.