The Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of Injectable SPN01 in Phase I.

Inclusion Criteria:

1. Body Mass Index (BMI): BMI between 19.0 kg/m² and 26.0 kg/m² (inclusive). For male subjects, body weight must be ≥50.0 kg; for female subjects, body weight must be ≥45.0 kg.
2. Contraceptive Use: Males or females of childbearing potential must use effective contraception during the study and for 30 days after administration. Effective contraception includes sterilization, intrauterine hormonal devices, condoms, contraceptive pills/devices, abstinence, or vasectomy.
3. Informed Consent: The subject must fully understand the purpose, nature, methods, and potential adverse effects of the study, voluntarily agree to participate, sign a written informed consent form, and comply with the study protocol.
4. For healthy subjects-Age between 18 and 45 years (inclusive), either male or female.
5. For healthy subjects-eGFR ≥ 90 ml/min/1.73 m².
6. For healthy subjects-Screening phase laboratory results (blood count, blood biochemistry, urine routine, coagulation function) must be normal or clinically insignificant.
7. For healthy subjects-Good general health with no major diseases, as determined by the investigator through history, vital signs, physical examination, clinical ECG, and laboratory test results.
8. For colorectal cancer subjects-Age between 18 and 75 years (inclusive), either male or female.
9. For colorectal cancer subjects-Pathologically confirmed diagnosis of colorectal cancer and scheduled for surgery (laparoscopic or open surgery).
10. For colorectal cancer subjects-No prior targeted treatment for colorectal cancer (including radiotherapy, chemotherapy, targeted therapy, etc.).
11. For colorectal cancer subjects-At least one evaluable lesion.

Exclusion Criteria:

1. Pregnancy or Lactation: Female subjects who are pregnant (positive pregnancy test at screening) or breastfeeding.
2. Pregnancy or Donation Plans: Subjects planning to become pregnant or donate sperm/eggs during the study or within 3 months after administration.
3. Allergy to SPN01: Known allergy to any component of the investigational drug SPN01, or a history of severe allergies.
4. History of Severe Systemic Diseases: A history of serious systemic diseases (including cardiovascular, digestive, urinary, respiratory, endocrine, immune, hematological, lymphatic, musculoskeletal, neurological diseases), liver or kidney dysfunction, or psychiatric disorders.
5. Alcohol or Drug Abuse: A history of alcohol or drug abuse/dependence.
6. Severe or Uncontrolled Psychiatric Disorder: Subjects with severe or uncontrolled psychiatric diseases.
7. Active Infection: Any active infection requiring systemic treatment or uncontrolled infection within 14 days prior to the start of the study drug.
8. Infectious Disease Positive: Subjects who test positive for human immunodeficiency virus (HIV), hepatitis C virus (HCV), or syphilis; subjects who test positive for hepatitis B virus (HBV) surface antigen.
9. Needle Phobia: Subjects with a history of vasovagal response to blood draws or injections and those who cannot tolerate intravenous cannulation.
10. Blood Donation or Blood Loss: Subjects who have donated blood or experienced total blood loss of ≥400 mL within the last 3 months.
11. Medication Use: Subjects who have taken any prescription drugs, over-the-counter medications, or herbal products within 2 weeks prior to the first dose, especially those who have used antacids (e.g., proton pump inhibitors, H2 receptor antagonists), P-glycoprotein (P-gp) inhibitors, or drugs associated with a risk of torsades de pointes, or those who have used any medications within 30 days prior to the first dose that inhibit or induce liver drug metabolism.
12. Other Clinical Trials: Participation in another clinical trial and use of other investigational drugs within 30 days prior to screening.
13. Vaccination: Receipt of any vaccination within 3 months prior to screening or plans to receive a vaccine during the study.
14. Other Conditions: Any other condition that, in the opinion of the investigator, would make the subject unsuitable for participation in the clinical trial.