Delayed diagnosis of abdominal Henoch-Schonlein purpura in children:A case report

BACKGROUND For children with abdominal Henoch-Schonlein purpura presenting abdominal pain as an initial symptom and severe clinical manifestations,but without purpura appearance on the skin,the diagnosis and treatment are relatively difficult.This study summarized the characteristics of this group of patients by literature review and provided additional references for further refinement of glucocorticoid therapy in this vasculitis.CASE SUMMARY A 6-year-old girl presented mainly with repeated abdominal pain and had received short-term out-of-hospital treatment with hydrocortisone.On day 7 after onset,gastroscopy revealed chronic non-atrophic gastritis and erosive duodenitis without purpuric rash,and no obvious resolution of the abdominal pain was found after treatment against infection and for protection of gastric mucosa.On day 14 the inflammatory indices continued to rise and the pain was relieved after enhanced anti-infective therapy,but without complete resolution.On day 19,the patient presented with aggravated abdominal pain with purplish-red dots on the lower limbs,by which Henoch-Schonlein purpura was confirmed.After 5 d of sequential treatment with methylprednisolone and prednisone,abdominal pain disappeared and she was discharged.CONCLUSION Henoch-Schonlein purpura-related rash may appear after long-term abdominal pain,and should be distinguished from acute and chronic gastrointestinal diseases at the early stage without typical rash.For bacterial infection-induced Henoch-Schonlein purpura,glucocorticoid therapy alone without clearing the infection may not relieve symptoms.

Henoch-Schonlein purpura with intestinal perforation and cerebral hemorrhage: A case report

Henoch-Schonlein purpura (HSP) with intestinal perforation and cerebral hemorrhage is a very rare clinical condition. There has been no report of HSP complicated with both intestinal perforation and cerebral hemorrhage until October 2012. Here we describe a case of HSP with intestinal perforation and cerebral hemorrhage in a 5-year-old girl. Plain abdominal radiograph in the erect position showed heavy gas in the right subphrenic space with an elevated diaphragm. Partial resection of the small intestine was performed, and pathological analysis suggested chronic suppurative inflammation in all layers of the ileal wall and mesentery. Seventeen days after surgery, cerebral hemorrhage developed and the patient died.

Gastrointestinal manifestations of Henoch-Schonlein purpura: A report of two cases

Henoch-Schonlein purpura(HSP) is a small vessel vasculitis mediated by type Ⅲ hypersensitivity with deposition of Ig A immune complex in the walls of vessels. It is a multi-system disorder characterizedby palpable purpura, arthritis, glomerulonephritis and gastrointestinal manifestations and commonly occurs in children and young adults. The patients with gastrointestinal involvement usually present with colicky abdominal pain, vomiting and melena. The imaging findings include multifocal bowel thickening with mucosal hyperenhancement, presence of skip areas, mesenteric vascular engorgement, with involvement of unusual sites like stomach, duodenum and rectum. These imaging findings in a child or young adult with appropriate clinical findings could suggest HSP.

Current views of the relationship between Helicobacter pylori and Henoch-Schonlein purpura in children

Helicobacter pylori(H. pylori) is one of the factors involved in the pathogenesis of various gastrointestinal diseases and may play a potential role in certain extraintestinal diseases. H. pylori infection are mainly acquired during childhood, and it has been reported that in endemic areas of China the infection rates are extraordinarily higher in HSP children, particular those with abdominal manifestations. Furthermore, eradication therapy may ameliorate Henoch-Schonlein purpura(HSP) manifestations and decrease the recurrence of HSP. Therefore, results suggested that detection of H. pylori infection by appropriate method ought to be applied in HSP children. Current evidences indicate that local injury of gastric mucosa and immunological events induced by H. pylori infection are involved in the development of HSP. Increased serum Ig A, cryoglobulins, C3 levels, autoimmunity, proinflammatory substances and molecular mimicry inducing immune complex and cross-reactive antibodies caused by H. pylori infection might play their roles in the course of HSP. However, there are no investigations confirming the causality between H. pylori infection and HSP, and the pathogenesis mechanism is still unclear. More bench and clinical studies need to be executed to elaborate the complex association between H. pylori and HSP.

Henoch-Schonlein purpura from vasculitis to intestinal perforation: A case report and literature review

Henoch-Sch?nlein purpura(HSP) is generally a selflimited vasculitis disease and has a good prognosis. We report a 4-year-old Thai boy who presented with palpable purpura, abdominal colicky pain, seizure, and eventually developed intestinal ischemia and perforation despite adequate treatment, including corticosteroid and intravenous immunoglobulin therapy. Imaging modalities, including ultrasonography and contrastenhanced computed tomography, could not detect intestinal ischemia prior to perforation. In this patient, we also postulated that vasculitis-induced mucosal ischemia was a cause of the ulcer, leading to intestinal perforation, and high-dose corticosteroid could have been a contributing factor since the histopathology revealed depletion of lymphoid follicles. Intestinal perforation in HSP is rare, but life-threatening. Close monitoring and thorough clinical evaluation are essential to detect bowel ischemia before perforation, particularly in HSP patients who have hematochezia, persistent localized abdominal tenderness and guarding. In highly suspicious cases, exploratory laparotomy may be needed for the definite diagnosis and prevention of further complications.

Angiotensin-converting Enzyme Gene Insertion/Deletion Polymorphism in Children with Henoch-Schonlein Purpua Nephritis

This study investigated the relationship between angiotensin-converting enzyme (ACE) gene insertion/deletion polymorphism and the occurrence, severity, prognosis of HSPN. The polymorphism of ACE gene in 103 HSPN cases and 100 healthy children was studied by using the polymerase chain reactions (PCR). Its relation to the clinical manifestation, pathological classification and prognosis of HSPN was analyzed accordingly. The results showed that: (1) there was a significantly higher frequency for DD genotype in HSPN children (P<0.01); (2) DD genotype was more frequently seen in HSPN children with gross hematuria and massive proteinuria (P<0.05), while DI genotype was more common in HSPN children group with renal insufficiency (P<0.05); (3) although mesangial proliferative lesion was most frequently observed in 21 biopsied HSPN children, and DD genotype frequency was still higher in children with severe pathology (Class Ⅲ Ⅳ); (4)II genotype was significantly frequent in HSPN children with complete remission in the follow-up of 32 HSPN children. It was concluded that the deletion allele of ACE gene might play a role, at least to some extent, in the occurrence, deterioration and progression in juvenile HSPN.

Spectrum of Henoch-Schonlein Purpura in Children: A Single-Center Experience from Western Provence of Saudi Arabia

The aim of this study was to describe the common presentation, frequency, and complications of Henoch-Schonlein purpura (HSP) in patients <18 years who were followed up at King Abdulaziz University Hospital, Jeddah over the last 12 years. We performed a retrospective chart review of the medical records of all patients diagnosed as HSP. During this period, only 29 cases were reported (15 males, 14 females), with the mean age at the diagnosis 7.5 years. 82% percent of the patients had joint involvement in the form of arthritis or arthralgia;17.2% had no joint involvement. Abdominal manifestations were reported in 72.4% of the patients, while renal involvement was documented in 24.1% of the cases;two patients had scrotal involvement. Four patients (13.7%) had a recurrence within four months of HSP diagnosis. However, all patients had full recovery within a month. More research is warranted to study the prevalence, clinical manifestations, preceding factors, and complications of HSP in a Saudi-based cohort.

Effects of methylprednisolone combined with montelukast on immune function and cytokines in children with recurrent Henoch-Schonlein purpura

Objective:To study the effects of methylprednisolone combined with montelukast on immune function and cytokines in children with recurrent Henoch-Schonlein purpura.Methods:Children who were diagnosed with recurrent Henoch-Schonlein purpura in Zigong Third People's Hospital between September 2015 and August 2017 were selected as the research subjects and randomly divided into the intervention group who received methylprednisolone combined with montelukast therapy and the control group who received hydrocortisone therapy. The levels of Th1/Th2 and Th17/Treg immunity indexes in peripheral blood as well as cytokines in serum were measured before treatment as well as 4 and 8 weeks after treatment.Results: 4 weeks and 8 weeks after treatment, Th1 and Treg cell contents as well as T-bet and FoxP3 mRNA expression in peripheral blood of both groups of patients were significantly higher than those before treatment whereas Th2 and Th17 cell contents as well as GATA-3 and RORγt mRNA expression in peripheral blood and NF-κB, OPN, IL-33, MK and HMGB1 contents in serum were significantly lower than those before treatment, and Th1 and Treg cell contents as well as T-bet and FoxP3 mRNA expression in peripheral blood of intervention group were significantly higher than those of control group whereas Th2 and Th17 cell contents as well as GATA-3 and RORγt mRNA expression in peripheral blood and NF-κB, OPN, IL-33, MK and HMGB1 contents in serum were significantly lower than those of control group.Conclusion: methylprednisolone combined with montelukast treatment of recurrent Henoch-Schonlein purpura can regulate the immune function and inhibit the cytokine secretion.

Evaluation of the cytokine levels and immune response status of montelukast, loratadine and tanshinone combination therapy for Henoch-Schonlein purpura

Objective:To evaluate the cytokine levels and immune response status of montelukast, loratadine and tanshinone combination therapy for Henoch-Schonlein purpura.Methods: A total of 80 patients with Henoch-Schonlein purpura who were treated in Ankang Central Hospital between May 2014 and January 2017 were collected and divided into montelukast group, loratadine group, tanshinone group and combined treatment group according to the random number table, 20 cases in each group. Serum levels of inflammatory factors, Th17/Treg cellular immunity indexes before and after treatment were compared among four groups of patients.Results: Before treatment, differences in serum levels of inflammatory factors and Th17/Treg cellular immunity indexes were not statistically significant among four groups of patients. After treatment, serum HMGB1, IL-8, IL-14, IL-23 and IL-33 levels in combined treatment group were lower than those in montelukast group, loratadine group and tanshinone group;serum IL-17 level was lower than that in montelukast group, loratadine group and tanshinone group while IL-10 and TGF-β levels were higher than those in montelukast group, loratadine group and tanshinone group.Conclusions: Montelukast, loratadine and tanshinone combination therapy for Henoch-Schonlein purpura helps to reduce systemic inflammatory response and balance Th17/Treg cell immunity.

Overview of the pathogenesis of Henoch-Schonlein purpura in children and the research progress on related mechanism of inflammatory cytokines

Henoch-schonlein purpura (HSP) is a kind of systemic vasculitis that is common in childhood,and its pathogenesis is complicated and considered to have important relationship with lymphocytes, vascular endothelial cells and so on. The causes of this disease are complex and have not been clearly identified, but numerous studies have shown that inflammatory factors such as IL-1, IL-17 and TNF-α play an important role in the development of HSP.

Regularity of syndrome differentiation and treatment of traditional Chinese medicine for Henoch-Schonlein purpura based on data mining techniques

Objective:This study aims to explore the regularity of syndrome differentiation and treatment of traditional Chinese medicine(TCM)for allergic purpura.Methods:CNKI,Weipu Chinese science and technology database,wanfang medical network database,and Chinese biomedical literature database were searched for eligible studies.Medical records including complete patient personal information,patient symptoms,TCM syndromes,treatment,and medication were included.The data was analyzed using the Chinese medicine heritage support platform provided by the Chinese Academy of Chinese medicine(V2.5).Results:Differentiation of health gas camp blood was the most commonly used method of differentiation of symptoms and signs in famous veteran TCM.The treatment included cooling blood,activating blood circulation,clearing heat and detoxifying toxins,removing blood stasis and stopping bleeding.Honeysuckle,Forsythia suspensa,cicada slough and other drugs were interrelated.Potential drug pair combinations and drug networks showed the basic drug composition of Qingying Decoction.According to the entropy cluster analysis,28 core drug combination and 12 new formulations were obtained.Conclusion:The regularity of syndrome differentiation and treatment of traditional Chinese medicine for Henoch-Schonlein purpura based on the famous and old TCM doctors was complex.Further researches are still needed.

Serum OPN and NF-κB contents in children with Henoch-Schonlein purpura and their correlation with oxidative stress and cellular immune function

Objective:To detect serum OPN and NF-κB contents in children with Henoch-Schonlein purpura (HSP) and study their correlation with oxidative stress and cellular immune function. Methods: The children who were diagnosed with HSP in Shijiazhuang First Hospital between February 2015 and October 2017 were selected as the HSP group of the study and the healthy children who received physical examination during the same period were selected as the control group. The serum was collected to measure the contents of OPN, NF-κB, oxidative stress indexes and immune cell inflammation, and the peripheral blood was collected to detect the mRNA expression of immune cell transcription factors.Results: OPN, NF-κB, MDA, MPO, IL-4, IL-5 and IL-17 contents in serum as well as GATA-3 and RORγt mRNA expression in peripheral blood of HSP group were significantly higher than those of control group whereas SOD, CAT, PON, IFN-γ and TGF-β1 contents in serum as well as T-bet and FoxP3 mRNA expression in peripheral blood were significantly lower than those of control group;serum OPN and NF-κB contents in HSP group were positively correlated with MDA, MPO, IL-4, IL-5 and IL-17 contents in serum as well as GATA-3 and RORγt mRNA expression in peripheral blood, and negatively correlated with SOD, CAT, PON, IFN-γand TGF-β1 contents in serum as well as T-bet and FoxP3 mRNA expression in peripheral blood. Conclusion: The abnormal increase of serum OPN and and NF-κB contents in children with HSP is closely related to the excessive oxidative stress activation and cellular immune dysfunction.

Effects of SOCS1 and SOCS3 in peripheral blood on CD4+T cell differentiation in children with Henoch-Schonlein purpura

Objective:To study the effects of suppressor of cytokine signaling 1 (SOCS1) and SOCS3 in peripheral blood on CD4+T cell differentiation in children with Henoch-Schonlein purpura. Methods: Children with Henoch-Schonlein purpura who were treated in Zigong Maternal and Child Health Hospital between June 2014 and February 2018 were selected as the HSP group of the study, and healthy children who received physical examination during the same period were selected as the control group of the study. Peripheral blood was collected to determine the expression of SOCS1 and SOCS3 as well as the contents of CD4+T cell subsets, and serum was collected to determine the contents of CD4+T cytokines.Results: SOCS1 and SOCS3 mRNA expression levels as well as SOCS3/SOCS1 ratio in peripheral blood of HSP group were significantly higher than those of control group;Th1 and Treg contents in peripheral blood as well as IFN-γ and TGF-β1 contents in serum of HSP group were lower than those of control group whereas Th2 and Th17 contents in peripheral blood as well as IL-4, IL-5 and IL-17 contents in serum were higher than those of control group, and Th1 and Treg contents in peripheral blood as well as IFN-γ and TGF-β1 contents in serum of HSP children with high SOCS3/SOCS1 ratio were lower than those of HSP children with low SOCS3/SOCS1 ratio whereas Th2 and Th17 contents in peripheral blood as well as IL-4, IL-5 and IL-17 contents in serum were higher than those of HSP children with low SOCS3/SOCS1 ratio.Conclusions: Changes in SOCS1 and SOCS3 expression in peripheral blood of children with Henoch-Schonlein purpura can affect the differentiation of CD4+T cells.

小剂量三尖杉酯碱治疗紫癜性肾炎

目的 :观察小剂量三尖杉酯碱治疗紫癜性肾炎的近期疗效。方法 :三尖杉酯碱 1mg +生理盐水 5 0 0ml/d静脉滴注 ,5～ 7d为 1疗程 ,间隔 2～ 3周 ,总共 3～ 6疗程。结果 :2 0例中显效 12例 (6 0 % ) ,有效 8例 (40 % )总有效率 (10 0 % )。结论 :小剂量三尖杉酯碱治疗紫癜性肾炎有效、安全 ,使用方便、费用低廉 ,值得临床应用。

Endoscopic and radiographic features of gastrointestinal involvement in vasculitis

Vasculitis is an inflammation of vessel walls,followed by alteration of the blood flow and damage to the dependent organ.Vasculitis can cause local or diffuse pathologic changes in the gastrointestinal (GI) tract.The variety of GI lesions includes ulcer,submucosal edema,hemorrhage,paralytic ileus,mesenteric ischemia,bowel obstruction,and life-threatening perforation.The endoscopic and radiographic features of GI involvement in vasculitisare reviewed with the emphasis on small-vessel vasculitis by presenting our typicalcases,including Churg-Strauss syndrome,HenochSch nlein purpura,systemic lupus erythematosus,and Beh et's disease.Important endoscopic features are ischemic enterocolitis and ulcer.Characteristic computed tomographic findings include bowel wall thickening with the target sign and engorgement of mesenteric vessels with comb sign.Knowledge of endoscopic and radiographic GI manifestations can help make an early diagnosis and establish treatment strategy.

Childhood Henoch-Schnlein Purpura Nephritis and IgA Nephropathy: One Disease Entity?——A Clinico-pathologically Comparative Study

Summary： In order to characterize their relationship through clinicopathological comparison between IgA nephropathy and Henoch-Schoenlein purpura nephritis （HSPN）, 31 children with IgA nephrop- athy aged between 3 to 15 years and 120 children with HSPN aged between 4 to 15 years were compared with each other in clinical manifestation, blood biochemistry, serum immunology and followup study. Renal pathological findings under light microscope, immunofluorescence and electronic microscope were analyzed and also compared between 31 children with IgA nephropathy and 32 biopsied children with HSPN. The results showed that the onset age was over 12 years in 25.8 % children with IgA nephropathy, but only 10 % in HSPN （P〈0.05）. The clinical patterns of IgA nephropathy and HSPN were similar, but extra-renal manifestations were more often in HSPN, all of them had skin purpura, 59 % had gastrointestinal symptoms and 47 % suffered from arthralgia, compared with only abdominal pain in 3.2 % children with IgA nephropathy. The renal pathological investigation showed global sclerosis in 35.5 % of IgA nephropathy and 3.1% of HSPN, mesangial sclerosis in 41.9 % of IgA nephropathy and 6.3 % of HSPN, but endothelial proliferation in 65.6 % of HSPN and 29 % of IgA nephropathy （all P〈0.01）. Thin basement membrane nephropathy was only found in 6. 5 % children with IgA nephropathy, no in HSPN. The electronic dense deposits in HSPN were sparse, lodse and wildly spread in glomerular mesangium, subendothelial area and even intra basement membrane, but it was dense, lumpy and mostly limited in mesangium and paramesangium in IgA nephropathy. Predominant IgA deposits were found in 81.2% of HSPN, and overwhelming IgG deposits in 12.5 % of HSPN with relatively weak IgA deposits, moreover 6.3 % of HSPN showed linear IgG deposits in glomerular capillary. Totally 71. 9 G of HSPN had IgG deposits in glomeruli and only 19.4% of IgA nephropathy showed glomerular IgG deposits （P〈0. 01）. No IgG deposit was observed in 81. 6 % of IgA nephropathy, among them most showed IgA and IgM and/or C3 deposits, moreover overwhelming IgG deposits and linear IgG deposits couldn＇t be found in IgA nephropathy. Mean 20 months follow-up showed complete remission in 72.5% of HSPN, but only 19.4% in IgA nephropathy after 34 months follow-up. Moreover, 64.5 % of IgA nephropathy had consistent hematuria and proteinuria and 16. 1% had active nephritides （P〈0.05）. It was concluded that significant clinico-pathological difference was found between HSPN and IgA nephropathy, which didn＇t support the one disease entity hypothesis. HSPN and IgA nephropathy are probably two diseases with similar immune abnormalities.

An Atypical Cause of Abdominal Pain in an Elderly Patient

Background: Henoch-Schonlein Purpura (HSP), or IgA vasculitis, is the most common vasculitis in children and is characterized by four symptoms: palpable purpura with no concurrent thrombocytopenia or coagulopathy, arthritis/ arthralgias, abdominal pain, and renal disease. HSP does occur in older patients at a much lower frequency. Objective: To discuss the atypical presentation of HSP in an elderly adult and the increased nephrogenic risks that are involved in this patient group. Case Presentation: We present the history, physical findings, laboratory results, and the clinical course of a 74-year-old Caucasian male with an atypical presentation of HSP. Our patient presented with severe gastrointestinal and cutaneous symptoms which occurred after the onset of abdominal pain. Biopsies demonstrated leukocytoclastic vasculitis in the skin and acute inflammation and hemorrhage in the gastrointestinal tract. The diagnosis was confirmed as IgA vasculitis following the renal biopsy. The patient’s symptoms improved with the administration of methylprednisolone. Conclusion: In adults with HSP there is greater concern regarding renal involvement and a greater risk of developing end-stage renal disease compared to children. The importance of recognizing HSP in the elderly is imperative for early diagnosis and appropriate treatment to limit renal damage.

Expressions and significances of IFN-γ, IL-10, TGF-β, PFP and GNLY in serum of children with Henoch Schonlein purpura

Objective:To investigate the expressions of interferon-γ (IFN-γ), interleukin-10 (IL-10), transforming growth factor-β (TGF-β), perforin (PFP) and granulysin (GNLY) in serum of children with Henoch-Schonlein purpura (HSP) and their significances.Methods: 86 children with HSP admitted to our hospital from April 2016 to April 2018 were selected as the study subjects (HSP group), according to whether or not combined with renal injury, they were divided into kidney injury group (41 cases) and non-kidney injury group (45 cases), and 40 healthy children as the control group. The levels of serum IFN-γ, IL-10 and TGF-β were detected by enzyme-linked immunosorbent assay (ELISA), levels of serum PFP and GNLY were detected by RT-PCR, the differences between different groups were compared, the relationships between serum IFN-γ, IL-10, TGF-β, PFP and GNLY in group HSP was also analyzed.Results: The levels of serum IFN-γ, PFP and GNLY in HSP group were lower than those in control group (P<0.05), and the levels of serum IL-10 and TGF-β were higher than those in control group (P<0.05);the levels of serum IFN-γ, PFP and GNLY in renal injury group were lower than those in non-renal injury group (P<0.05), while the levels of serum IL-10 and TGF-β were higher than those in non-renal injury group (P<0.05);in HSP group, serum IFN-γ was negatively correlated with TGF-β (r=-0.417,P=0.037), and positively correlated with PFP and GNLY (r=0.508, 0.477,P=0.025, 0.030);there was a positive correlation between IL-10 and TGF-β (r=0.514,P=0.017).Conclusion: The changes of serum IFN-γ, IL-10, TGF-β, PFP and GNLY are closely related to the occurrence and progression of HSP, early detection is helpful to the evaluation of HSP and has guiding significance for clinical prevention of Henoch-Schonlein purpura nephritis.

Cutaneous Vasculitis with Renal Impairment in Octogenarian

Henoch-Sch&ouml;nlein purpura is a vasculitis of small vessels, characterized by tissue deposition of IgA, affecting predominantly the skin, intestine, joints and kidneys. It mainly affects the pediatric age group, especially from 2 to 11 years old. Most often, it is preceded by episode of upper airway infection from days to weeks. The most common clinical manifestations are purpuric cutaneous lesions located in the lower limbs and buttocks, abdominal pain in colic, nausea, vomiting, diarrhea, in addition to arthralgia/arthritis, usually with spontaneous resolution. Renal impairment usually manifests with hematuria and proteinuria, and renal function may also be impaired. The case described refers to a female patient, 86 years old, with a previous history of infection of the upper airways, followed by purpura in the lower limbs and renal impairment: serum creatinine 3.1 mg/dL (N 0.5 - 1.2 mg/dL);glomerular filtration rate 15 ml/min (N > 60 ml/min);urea 118 mg/dL (N &ouml;nlein purpura in an atypical age group, with significant renal impairment, improvement only with conservative treatment, thus avoiding the use of immunosuppressants and the risks of immunosuppression and toxicity related to such drugs.

IgA1 from HSP Patients Trigger Apoptosis and Inhibit Cytoskeletal Proteins in HUVEC

Background: Henoch-Schonlein purpura (HSP) is a kind of systemic small vessel vasculitis in children. Endothelium cells injury induced by IgA1 is considered important in the pathogenesis of HSP. Research found that the apoptosis of vein endothelial cells was related to the vasculitis in HSP patients. Purpose: To observe the effect of IgA1 from HSP patients on the apoptosis of HUVEC and firstly analyze the mechanism of the apoptosis of HUVEC induced by IgA1. Methods: HUVECs were cultured in 3 different conditional media with IgA1 from HSP patients, normal healthy children and simply medium (blank control). Serum IgA1 was purified by jacalin affinity chromatography. The rates of apoptosis in HUVEC incubated with IgA1 were determined by TUNEL method and flow cytometry, respectively. The expression of the cytoskeletal proteins, such as FAK, Vinculin and MLCK was detected with the methods of Real-time PCR and Westernblot, respectively. Results: The present study showed that the apoptosis rate of HUVEC by IgA1 isolated from HSP patients was higher than blank control (14.77% ± 2.23% vs 2.25% ± 0.77%) (P < 0.01) and the rate of HUVEC by IgA1 from normal healthy children was higher than blank control (9.97% ± 1.48% vs 2.25% ± 0.77%) (P < 0.01). The cytoskeletal proteins, such as FAK, Vinculin and MLCK expression were down-regulated in HUVEC co-cultured with IgA1 isolated from HSP patients for 24h. Conclusion: These findings firstly on IgA1 from HSP patients may induce apoptosis of vascular endothelial cells through inhibiting the cytoskeletal proteins expression. IgA1 may accelerate progression of HSP by inducing apoptosis of vascular endothelial cells.