KGX101ST101: This study aims to determine the recommended dose level, safety and effectiveness of a new drug (called KGX101) in people with advanced or metastatic solid cancers.A Phase 1, First-in-Human, Multicenter, Open-Label, Dose Escalation Trial of KGX101 Administered as a Monotherapy to Patients With Advanced or Metastatic Solid Tumors

Exclusion

1. A history of another active malignancy (i.e., a second cancer) within the previous 2 years, except for localized cancers that are not related to the current cancer being treated, are considered cured, and, in the opinion of the Investigator, present a low risk of recurrence. These exceptions include but are not limited to basal or squamous cell skin cancer, superficial bladder cancer, or carcinoma in situ of the prostate, cervix, or breast.
2. Patients with primary CNS malignancies;
3. A history of allogeneic tissue/solid organ transplant.

4. Any evidence of severe or uncontrolled systemic diseases, including:

   1. Active, uncontrolled systemic bacterial, viral, or fungal infection;
   2. uncontrolled hypertension (Systolic blood pressure more than equal to 160mHG or diastolic blod pressure more than equal to 100mm HG or poor compliance with anti-hypertensive agents;
   3. or active bleeding diatheses;
   4. Clinically significant arrhythmia, unstable angina pectoris, congestive heart failure (class III or IV of New York Heart Association [NYHA]) or acute myocardial infarction within 6 months;
   5. Uncontrolled diabetes or poor compliance with hypoglycemic agents;
   6. The presence of chronically unhealed wound or ulcers;
   7. Other chronic diseases, which, in the opinion of the Investigator, could compromise safety of the patient or the integrity of study.
5. Active autoimmune disease requiring systemic treatment in the past 2 years.
6. Diagnosis of immunodeficiency, is on immunosuppressive therapy, or is receiving chronic systemic or enteric steroid therapy.
7. A history of (non-infectious) pneumonitis / interstitial lung disease that required steroids or has current pneumonitis / interstitial lung disease.
8. HIV-infected participants with a history of Kaposi sarcoma and/or Multicentric Castleman Disease.
9. Active infection as determined by hepatitis B surface antigen and hepatitis B core antigen antibody, or hepatitis B virus DNA by quantitative polymerase chain reaction (qPCR) testing.
10. Active infection as determined by hepatitis C virus (HCV) antibody or HCV RNA by qPCR testing.
11. Major surgery (excluding placement of vascular access) within 4 weeks prior to the first dose of study drug.

12. Treatment with any of the following:

    1. Prior treatment with IL-12 therapy (any form, e.g. recombinant human, prodrug, intratumoral, etc.);
    2. Presence of CNS metastases that are symptomatic and/or require local CNS directed therapy (such as XRT or surgery) or increasing doses of corticosteroids within 2 weeks prior to the first dose of study drug. Except patients with treated brain metastases should be neurologically stable and receiving less than equal to 10mg per day of prednisone or equivalent prior to study entry;
    3. Investigational agent or anticancer therapy (including chemotherapy, biologic therapy, immunotherapy, anticancer Chinese medicine, or anticancer herbal remedy) within 5 half-lives or 4 weeks (whichever is shorter) prior to the first dose of study drug;
    4. Radiotherapy within 2 weeks of the start of study treatment. A 1-week washout is permitted for palliative radiation (less than equal to two weeks of radiotherapy) to non-CNS disease;
    5. Received a live or live-attenuated vaccine within 30 days of the first dose of study drug; Note: Administration of killed vaccines or other formats are allowed;
    6. Diagnosis of immunodeficiency, on immunosuppressive therapy, or receiving chronic systemic or enteric steroid therapy (dose > 10 mg/day of prednisone or equivalent);
    7. Prior receipt of an allogeneic stem cell transplant or allogeneic CAR-T cell therapy;
13. Any unresolved toxicities from prior therapy greater than NCI CTCAE version 5.0 Grade 1 at the time of starting study drug with the exception of alopecia and Grade 2 prior platinum-therapy related neuropathy.
14. Significant electrocardiogram (ECG) abnormalities.
15. Any illness, medical condition, organ system dysfunction, or social situation (including mental illness or substance abuse), that may interfere with a patient's ability to sign the ICF, adversely affect the patient's ability to cooperate and participate in the study, or compromise interpretation of study results.
16. Pregnant (confirmed by serum beta human chorionic gonadotropin [ HCG]) or lactating.
17. History of hypersensitivity to any of the study drug components.
18. Participant is known or suspected of not being able to comply with the study protocol (e.g. because of alcoholism, drug dependency, or psychological disorder) or the participant has any condition for which, in the opinion of the Investigator, participation would not be in the best interest of the participant (e.g. compromise their well-being) or that could prevent, limit, or confound the protocol-specified assessments.