The goal of this study is to develop a biorepository to store pediatric biospecimens from nephrology cohorts for on-going and future research studies. These studies plan to advance the state of science in the hopes to find more information that potentially leads to developing novel diagnostic approaches and identify therapeutic targets to prevent and/or treat pediatric disease involving the kidneys.

A device called the "Liposorber LA-15 System" has been approved by the United States Food and Drug Administration for treating kids with focal segmental
glomerulosclerosis (FSGS). The "Liposorber LA-15 System" can only be used if other treatment options, like drugs, don't work or can't be used, but the kidneys are still working okay. It can also be used if the subject has had a kidney transplant and the FSGS comes back after the transplant. Although the Liposorber System can be used for FSGS, we are not sure how well the Liposorber System works. So, we are doing this study to find out how well the treatment works.

In this research study, there will be up to 5 children who have FSGS enrolled at MUSC. Subjects will come back for up to 12 treatments over 9 weeks and then 5 visits to their study doctor over the next 2 years.