Proteinuria is defined as the presence of an excess of serum proteins in the urine. Participant was considered as a responder on achieving >=50 percent reduction in proteinuria from Baseline (measured as 24 hour total protein) and also having a stable renal function of >=70 percent of Baseline estimated glomerular filtration rate (eGFR) at end of treatment (>=16 Weeks). Only those participants available at the specified time points (represented by n=X in the category titles) were analyzed.

Completed Treatment Population: comprised of participants who had completed >=16 weeks of losmapimod treatment or who withdrew from the treatment. Participants who withdrew prior to Week 16 were considered as non-responders.

Proteinuria is defined as the presence of an excess of serum proteins in the urine. Participant was considered as responder on achieving >=50 percent reduction in proteinuria from Baseline (measured as 24 hour total protein) and also having a stable renal function of >=70 percent of Baseline eGFR at any time during the treatment phase of the study. Reduction in proteinuria assessment at any time during the treatment phase of the study was done by utilizing a responder analysis.

Completed Treatment Population

Reduction in proteinuria was measured by the Up/c ratio (spot and 24 hr) at Baseline, Week 2, 4, 8, 16, 24, end of study and at Follow-up (FU) visits Week 30 and 36. Spot urine sample was provided by the participants on site. The 24 hour urine collection started with the second morning void and ended with the first morning void on the following day; generally, 24 hour urine collection was initiated the day prior to the study visit. Baseline was defined as the value obtained at Week 0. Percent change from Baseline was calculated as change from Baseline value divided by Baseline value multiplied by 100. Only those participants available at the specified time points (represented by n=X in the category titles) were analyzed.

All Subject Population: all eligible participants who received at least one dose of investigational drug.

Incidence of complete remissions at any time point was defined as 24 hour total protein <0.3 gram (g) per Day and maintenance of >=70 percent of Baseline eGFR throughout the treatment period. Only those participants available at the specified time points (represented by n=X in the category titles) were analyzed.

Completed Treatment Population

An AE is any untoward medical occurrence in a clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect, any other situation according to medical or scientific judgment or all events of possible drug-induced liver injury with hyperbilirubinaemia were categorized as SAE. Participants having any AE or SAE were included in the analysis.

All Subject Population

Participants were monitored from start of the study treatment (Week 0) up to Week 36 for development of toxicity. Participants who developed toxicity during the period were to be withdrawn from the study.

All Subject Population

Blood pressure was measured in a sitting position after 5 minutes rest with comfortably seated, legs uncrossed and the back and arm supported, such that the middle of the cuff on the upper arm is at the level of the right atrium and asked to remove all clothing that covered the location of cuff placement. It was recorded at Screening, Baseline, Week 2, Week 4, Week 8, Week 16, Week 24, End of study, and until the follow-up visit (Week 30 and Week 36). Vital sign measurements were repeated if the values were < 80 mmHg or > 140 mmHg SBP and <40 mmHg or >90 mmHg for DBP. Baseline was defined as the value obtained on Week 0. Change from Baseline was calculated as visit value minus value at Baseline. Only those participants available at the specified time points were analyzed (represented by n=X in the category titles).

All Subject Population

Heart rate was measured at screening, Baseline and throughout the treatment phase (Week 24) and Follow-up phase (Week 36). Heart rate measurement was repeated if the values are calculated <50 beats per minute. (bpm) or >110 bpm after the start of dosing. Baseline was defined as the value obtained at Week 0. Change from Baseline was calculated as visit value minus value at Baseline. Only those participants available at the specified time points were analyzed (represented by n=X in the category titles).

All Subject Population

Blood samples were collected at Screening (Week -4 and -2), Baseline (Week 0) and at Weeks 2, 4, 8, 16, 24 and Follow-up (Week 30 and 36) to evaluate ALT, AST, AP and GGT. Baseline was defined as the value obtained at Week 0. Change from Baseline was calculated as visit value minus value at Baseline. Only those participants available at the specified time points were analyzed (represented by n=X in the category titles).

All Subject Population

Clinical chemistry parameters: direct bilirubin and total bilirubin were assessed at Baseline (Week 0) and at Weeks 2, 4, 8, 16 24, End of studyand Follow-up (Week 30 and 36) phase. Baseline was defined as the value obtained at Week 0. Change from Baseline was calculated as visit value minus value at Baseline. Only those participants available at the specified time points were analyzed (represented by n=X in the category titles).

All Subject Population

Clinical chemistry parameters: albumin and total protein were assessed at Baseline (Week 0), at Weeks 2, 4, 8, 16, 24 and Follow up (Week 30 and 36) phase. Baseline was defined as the value obtained at Week 0. Change from Baseline was calculated as visit value minus value at Baseline. Only those participants available at the specified time points were analyzed (represented by n=X in the category titles).

All Subject Population

Serum creatinine were assessed at Baseline (Week 0), at Weeks 2, 4, 8, 16, 24 and Follow-up (Week 30 and 36) phase. Baseline was defined as the value obtained at Week 0. Change from Baseline was calculated as visit value minus value at Baseline. Only those participants available at the specified time points were analyzed (represented by n=X in the category titles).

All Subject Population

eGFR was calculated by using the 4-variable Modification of Diet in Renal Disease (MDRD) at Baseline (Week 0), at Weeks 2, 4, 8, 16, 24 and Follow-up (Week 30 and 36) phase. Baseline was defined as the value obtained at Week 0. Change from Baseline was calculated as visit value minus value at Baseline. Only those participants available at the specified time points were analyzed (represented by n=X in the category titles).

All Subject Population.

Cystatin C was assessed at Baseline (Week 0), at Weeks 2, 4, 8, 16, 24 and Follow-up (Week 30 and 36) phase. Baseline was defined as the value obtained at Week 0. Change from Baseline was calculated as visit value minus value at Baseline.

All Subject Population

Pharmacokinetics (PK) of losmapimod 7.5 mg was evaluated in participants with focal segmental glomerulosclerosis (FSGS) using AUC over the dosing interval of losmapimod 7.5 mg. PK samples were collected at Week 0 (pre-dose and 1, 2, 4, 6 hrs post-dose). Plasma concentration-time data were collected only up to 6 hours post the first 7.5 mg dose and only up to 2 hours post the first 15 mg dose and were not adequate to conduct a noncompartmental analysis to compare with historical data.

PK Population: All participants from whom a PK sample obtained and analyzed, included in the PK population.

PK of losmapimod 15 mg was evaluated in participants with FSGS using AUC over the dosing interval of losmapimod 15 mg. PK samples were collected at Week 2 (Pre-dose, 2 hrs post-dose) and Week 4, 8, 16, 24 (one of the following post-dose times: 0-2 hrs, 2-4 hrs, 4-6 hrs, and 6-8 hrs post-dose). Plasma concentration-time data were collected only up to 6 hours post the first 7.5 mg dose and only up to 2 hours post the first 15 mg dose and were not adequate to conduct a noncompartmental analysis to compare with historical data.

PK Population.

PK of losmapimod 7.5 mg was evaluated in participants with FSGS using Cmax PK samples were collected at Week 0 (pre-dose and 1, 2, 4, 6 hrs post-dose). Plasma concentration-time data were collected only up to 6 hours post the first 7.5 mg dose and only up to 2 hours post the first 15 mg dose and were not adequate to conduct a noncompartmental analysis to compare with historical data.

PK Population.