Is Henoch-Schönlein purpura nephritis hereditary?
Jun 06, 2022
Source: Cainiu Health
Dr. Wang Xiaoyan
Introduction
IgA vasculitis–associated nephritis (previously known as Henoch–Schönlein purpura nephritis) is a particularly challenging form of IgA vasculitis to treat; however, it is not hereditary and does not exhibit a genetic predisposition. Initially, patients with IgA vasculitis–associated nephritis present with hemorrhagic, symmetric, erythematous macular rashes—commonly localized to the lower extremities, especially around the ankles and knees—and may also involve the buttocks and upper limbs. Gastrointestinal manifestations include abdominal pain, nausea, vomiting, and hematochezia; hematemesis may occasionally occur.
IgA vasculitis–associated nephritis (also known as Henoch–Schönlein purpura nephritis) is an inflammatory renal condition primarily triggered by IgA vasculitis (Henoch–Schönlein purpura), and it is closely associated with dysregulation of the body’s immune system. Does IgA vasculitis–associated nephritis have a hereditary component? Details are as follows:
IgA vasculitis–associated nephritis represents one of the more refractory forms of IgA vasculitis, yet it is not inherited and shows no genetic predisposition.
Firstly, skin rashes in patients with IgA vasculitis–associated nephritis are typically hemorrhagic and symmetrically distributed, presenting as red maculopapular lesions. These lesions most commonly occur on the lower extremities—especially around the ankles and knees—but may also appear on the buttocks and upper limbs. Gastrointestinal manifestations include abdominal pain, nausea, vomiting, and hematochezia; hematemesis may occasionally occur.
In children, IgA vasculitis–associated nephritis may be complicated by intussusception, intestinal obstruction, or intestinal perforation. Hypertension secondary to IgA vasculitis–associated nephritis accounts for approximately 20% to 40% of all hypertension cases observed in this patient population. Blood pressure elevation is usually mild to moderate, and hypertension is often detected concurrently with urinary abnormalities. Nevertheless, the majority of patients with IgA vasculitis–associated nephritis experience relatively rapid recovery.
Regarding pharmacotherapy, medications that reduce platelet count—such as cephalosporins, quinine, sodium aminosalicylate, rifampin, aspirin, digoxin, quinidine, sulfonamides, and promethazine—should be avoided. Additionally, drugs that inhibit platelet function—including dipyridamole and dextran—must also be avoided.
