Study: NCT03958851

Intervention type: DIAGNOSTIC_TEST
Intervention: Doppler ultrasonography of renal arteries
Description: Ultrasound evaluation will be performed for all patients as well as healthy individuals.in patients with lupus nephritis,the ultrasound evaluation will be performed the 24 h prior to the renal biopsy . In the maximum long-axis section images, the largest diameter and width of each kidney will be measured. The participants will be scanned in a supine or decubitus position to achieve an ultrasound beam as close to parallel to the blood flow direction in the intrarenal artery as possible. RRI is measured as :~RRI = (peak systolic velocity - end diastolic velocity ) / peak systolic velocity. the average of three measurements will be taken.

Intervention type: DIAGNOSTIC_TEST
Intervention: Doppler ultrasonography of renal arteries
Description: Ultrasound evaluation will be performed for all patients as well as healthy individuals.in patients with lupus nephritis,the ultrasound evaluation will be performed the 24 h prior to the renal biopsy . In the maximum long-axis section images, the largest diameter and width of each kidney will be measured. The participants will be scanned in a supine or decubitus position to achieve an ultrasound beam as close to parallel to the blood flow direction in the intrarenal artery as possible. RRI is measured as :~RRI = (peak systolic velocity - end diastolic velocity ) / peak systolic velocity. the average of three measurements will be taken.

Intervention type: DIAGNOSTIC_TEST
Intervention: Doppler ultrasonography of renal arteries
Description: Ultrasound evaluation will be performed for all patients as well as healthy individuals.in patients with lupus nephritis,the ultrasound evaluation will be performed the 24 h prior to the renal biopsy . In the maximum long-axis section images, the largest diameter and width of each kidney will be measured. The participants will be scanned in a supine or decubitus position to achieve an ultrasound beam as close to parallel to the blood flow direction in the intrarenal artery as possible. RRI is measured as :~RRI = (peak systolic velocity - end diastolic velocity ) / peak systolic velocity. the average of three measurements will be taken.

Intervention type: DIAGNOSTIC_TEST
Intervention: Renal biopsy
Description: Renal biopsy is a medical procedure in which a small piece of kidney is removed from the body for examination, usually under a microscope. Microscopic examination of the tissue can provide information needed to diagnose, monitor or treat problems of the kidney.Renal biopsy will be taken according American college of Romatology guidelines 2012.The renal biopsy samples were evaluated according to the Revision of the International Society of Nephrology/Renal Pathology Society classification for lupus nephritis 2017. the actvity index and chronicity index will be calculated.

Intervention type: DIAGNOSTIC_TEST
Intervention: kidney function tests
Description: blood sample will be taken to measure blood urea nitrogen (BUN) and serum creatinine(S Cr). estimated glomerular filtration rate (eGFR) will be measured using CKD-EPI Equation.These investigations will be done at the beginning of the study and every month for sex months for each patient to determine degree of response to treatment .

Intervention type: DIAGNOSTIC_TEST
Intervention: The 24-hour urine protein test
Description: The 24-hour urine protein test checks how much protein is being spilled into the urine.Urine samples are collected in one or more containers over a period of 24 hours. The containers are kept in a cool environment and then sent to a lab for analysis. Specialists then check the urine for protein.This investigations will be done at the beginning of the study and every month for sex months for each patient to determine degree of response to treatment .

Intervention type: DIAGNOSTIC_TEST
Intervention: complete blood counting (CBC)
Description: A complete blood count is a blood panel that gives information about the cells in a patient's blood, such as the cell count for each blood cell type and the concentrations of hemoglobin.