Objective To summarize and evaluate the treatment strategies and clinical outcomes of bladder inflammatory myofibroblastic tumor(IMT),so as to provide reference for the diagnosis and treatment of this rare entity.Methods A retrospective analysis was conducted on the clinical data of two patients with bladder IMT treated at Shandong Provincial Hospital Affiliated to Shandong First Medical University.In combination with literature analysis,the clinical characteristics,treatment methods and prognosis of this disease were analyzed.Results Both patients presented with painless terminal macroscopic hematuria.Patient 1 was a 42-year-old male with a 6 cm bladder mass detected by cystoscopy,with no muscular involvement.Transurethral en bloc resection with a 1470 nm diode laser was performed,followed by a second transurethral resection.Patient 2 was a 21-year-old male with a 5 cm bladder mass visualized on cystoscopy,with no muscular invasion.Transurethral en bloc resection using a 1470 nm diode laser was conducted,followed by transurethral laser marking the margin of the wound and laparoscopic partial cystectomy.Preoperative cystoscopic biopsy and postoperative pathology diagnosed it as IMT,which invaded the superficial muscular layer and the margin was negative.Patient 1 was followed for 40 months and patient 2 for 15 months.Follow-up cystoscopy performed every 3 months showed no evidence of recurrence.This article also summarized the relevant literature on bladder IMT over the past five years.Conclusion Bladder IMT is an extremely rare neoplasm with nonspecific clinical manifestations,posing challenges in both diagnosis and treatment.However,early recognition and definitive pathological diagnosis,combined with bladder-sparing surgical strategies such as en bloc resection,often result in favorable outcomes,with reduced risk of recurrence and improved quality of life.

Objective To summarize and evaluate the treatment strategies and clinical outcomes of bladder inflammatory myofibroblastic tumor(IMT),so as to provide reference for the diagnosis and treatment of this rare entity.Methods A retrospective analysis was conducted on the clinical data of two patients with bladder IMT treated at Shandong Provincial Hospital Affiliated to Shandong First Medical University.In combination with literature analysis,the clinical characteristics,treatment methods and prognosis of this disease were analyzed.Results Both patients presented with painless terminal macroscopic hematuria.Patient 1 was a 42-year-old male with a 6 cm bladder mass detected by cystoscopy,with no muscular involvement.Transurethral en bloc resection with a 1470 nm diode laser was performed,followed by a second transurethral resection.Patient 2 was a 21-year-old male with a 5 cm bladder mass visualized on cystoscopy,with no muscular invasion.Transurethral en bloc resection using a 1470 nm diode laser was conducted,followed by transurethral laser marking the margin of the wound and laparoscopic partial cystectomy.Preoperative cystoscopic biopsy and postoperative pathology diagnosed it as IMT,which invaded the superficial muscular layer and the margin was negative.Patient 1 was followed for 40 months and patient 2 for 15 months.Follow-up cystoscopy performed every 3 months showed no evidence of recurrence.This article also summarized the relevant literature on bladder IMT over the past five years.Conclusion Bladder IMT is an extremely rare neoplasm with nonspecific clinical manifestations,posing challenges in both diagnosis and treatment.However,early recognition and definitive pathological diagnosis,combined with bladder-sparing surgical strategies such as en bloc resection,often result in favorable outcomes,with reduced risk of recurrence and improved quality of life.

Human APOBEC3G (hA3G) is a cytidine deaminase which inhibits HIV-1 replication. The HIV-1 accessory protein viral infectivity factor (Vif) counteracts with hA3G by targeting it for proteasomal degradation. In this work, we constructed and optimized molecular models of the hA3G dimer and the hA3G-Vif complex. The molecular modeling study revealed that the loop7 motif of hA3G appears on the interfaces of both the hA3G-Vif complex and the hA3G dimer. Biochemical analysis provided evidence suggesting that binding of Vif to hA3G results in steric blocking of hA3G dimerization, implying that monomeric hA3G serves as a substrate for Vif-mediated degradation. Furthermore, we presented evidence for the important roles of the loop7 motif, especially the central residues within the region, in hA3G dimerization, hA3G--Vif interaction, Vif-mediated hA3G degradation as well as subcellular localization of hA3G. This work highlights a multiple-task interface formed by loop7 motif, which regulates biological function of hA3G, thus providing the feasibility of the strategy of blocking Vif-mediated A3G degradation by targeting the putative site around loop7.