Plasma Cell Disorder

This study will assess the safety, tolerability, pharmacokinetics (PK) and the therapeutic potential of HDP-101 in patients with plasma cell disorders including multiple myeloma.

The purpose of the study is to evaluate if firefighter exposure to hazardous compounds will increase the incidence of premalignant hematological states which subsequently increases the risk of the development of hematologic malignancies, and potentially other pathophysiological consequences.

The purpose of this research is to evaluate whether HDAA in combination with a single dose of 100 mg/m2 IV melphalan followed by autologous stem cell transplantation (ASCT) is safe and effective for subjects with relapsed refractory multiple myeloma. The proposed melphalan dose is 50% of the current standard myeloablative dose (200 mg/m2). Based on our preclinical data, the investigator hypothesize that the combination of reduced dose melphalan with IV HDAA will have high efficacy and tolerability Primary Objective To determine tumor response using International Myeloma Working Group (IMWG) criteria (see Appendix B). Secondary Objectives Objectives: 1. Determine the safety and tolerability of HDAA in combination with reduced dose melphalan conditioning and autologous stem cell transplantation (ASCT) in relapsed refractory multiple myeloma subjects. 2. Determine the rate of Minimal Residual Disease (MRD) negativity at time point of response assessment using 8 color flow cytometry on BM sample. Functional imaging, such as positron emission tomography (PET) scan and magnetic resonance imaging (MRI), will also be performed to assess the disease status. 3. Categorize and quantify adverse events compared to historical control. 4. Determine quality of life parameters using standardized health-related quality of life measures 5. Determine oxidative stress parameters in plasma during treatment.

The purpose of this study is to look at the safety, tolerability, and serum concentration of daratumumab administered subcutaneously in the thigh versus the abdomen in patients with plasma cell disorders. Daratumumab is a monoclonal antibody that can attach itself to the CD38 protein on the surface of abnormal plasma cells. Daratumumab can kill the abnormal plasma cells and/or help your immune system find and destroy them. Due to the way daratumumab works, normal cells may also be affected. All reference to the words "study drug" in this consent form will mean Daratumumab. Daratumumab has been approved by the U.S. Food and Drug Administration (FDA) alone or in combination with other standard of care drugs for treatment of multiple myeloma in both subcutaneous (DARZALEX FASPRO®) and intravenous (DARZALEX®) ways of being delivered. The FDA has also approved the subcutaneous administration of daratumumab combined with other standard of care drugs for patients with light chain (AL) amyloidosis. Subcutaneous means the drug is given by an injection just beneath the skin. Intravenous (IV) means the drug is given as an injection directly into a vein. Usually when given subcutaneously, the study drug is given by an injection in the abdomen. Having the drug given by subcutaneous injection (underneath the skin of the abdomen) has lessened the IV related side effects and the drug administration by injection is quicker. However, some patients cannot receive the study drug injections in their abdomen because they find them very painful or have other medical reasons making it difficult to get these injections. The goal of this study is to see if getting the study drug subcutaneously, injected under the skin by a needle, in the patient's upper thigh will have the same results, or better results, as getting the injection in the abdomen. This would therefore, improve patients access to the drug and provide an alternative place to receive the injection of the drug. This study will take place at University of Maryland Medical Center and there will be about 30 people who will take place in this study here. Dr. Badros is the Sponsor-Investigator of the study. Funding to conduct the study and study drug are being provided by Johnson \& Johnson Innovative Medicine (J\&J IM).

The goal of this observational study is to study the genetic landscape in patients with Plasma Cell Disorders including MGUS, SMM, MM, and amyloidosis in Thailand. The main questions it aims to answer are: * genetic landscape in patients with Plasma Cell Disorders including MGUS, SMM, MM, and amyloidosis in Thailand who were performed FISH and/or NGS testing * genetic correlation and genetic dependency between FISH and NGS, stratified by high- and standard-risk groups based on FISH testing in Thai MM patients. * disease characteristics and response rates in MM patients with cytogenetic abnormalities detected by FISH and/or genetic mutations detected by NGS. * correlation between cytogenetic abnormalities identified by FISH and genetic mutations detected by NGS with progression-free survival in MM patients. The FISH and/or NGS testing results, disease characteristics, treatment, and treatment outcomes of patients with plasma cell disorders who underwent FISH and/or NGS testing before IRB approval will be collected through retrospective chart review. Subsequently, data will be gathered prospectively. Participants will provide approximately 12 mL of bone marrow fluid for FISH and NGS testing.