Israel Medical Association Journal

Background: Serum ferritin is a sensitive inflammatory biomarker reflecting cell damage and oxidative stress in inflammatory rheumatic diseases. The use of ferritin for assessment of systemic sclerosis (SSc) activity, severity, and prognosis has not been fully elucidated.

Objectives: To assess the correlation between serum ferritin levels and SSc disease parameters, complications, and outcome.

Methods: Demographic, clinical, and laboratory data, including blood levels of ferritin, were collected from files of patients with SSc who were treated at the Rheumatology Institute at Rambam Health Care Campus from January 2004 to July 2021. The study compared SSc patients with elevated levels of ferritin to those with normal levels.

Results: We extracted data of 241 SSc patients (80% female, 60% with diffuse SSc, mean age 54 ± 15.4 years, mean disease duration 6.8 ± 4.5 years). During follow-up, 39% died. Elevated ferritin levels positively correlated with male sex; short disease duration; lung, heart, and kidney involvement; higher modified Rodnan skin score; anemia; elevated levels of creatinine kinase, C-reactive protein, creatinine, and troponin; reduced pulmonary function tests (forced vital capacity and diffusion capacity of the lung for carbon monoxide); and left ventricular ejection fraction. There were no correlations between ferritin levels and pulmonary hypertension or gastrointestinal involvement. Levels of ferritin negatively correlated with anti-centromere antibodies.

Conclusions: In SSc, ferritin can serve as a marker for ongoing systemic inflammation and prognosis, particularly in patients with lung and heart involvement. Further studies on serial ferritin measurement in the management of SSc patients are warranted.

Background: Leptin, a pleiotropic hormone, has been suggested to be part of an acute phase response during an inflammatory stimulus. Its correlation with other acute phase reactants during minor infection in children has not been investigated.

Objectives: To study the correlation between serum leptin levels to those of C-reactive protein, a well-documented acute-phase reactant, in a series of pediatric patients with acute minor infections.

Methods: Leptin and CRP[1] levels were measured in 62 blood samples of pediatric patients presenting with mild febrile illness who were admitted to Dana Children’s Hospital in Israel. All children were finally diagnosed as having minor infection based on the negative blood/urine cultures and favorable outcome.

Results: Serum leptin level was positively correlated with CRP (r² = 0.5), total white blood cells (r² = 0.33) and absolute neutrophil count (r² = 0.31). The regression coefficient was the highest between leptin and CRP.

Conclusions: Circulating leptin concentrations are positively correlated with CRP levels during acute minor infection in children visiting the emergency room for febrile illnesses. Our observation suggests that leptin is indeed a part of acute-phase proteins. The wide scattering showed that it is not a better marker in minor infections than CRP, but it may contribute to weight loss and anorexia seen in the minority of patients during mild infections.

Background: Previous reports on the behavior of procalcitonin blood levels in diverse clinical conditions suggest that it is part of the activation of cellular immunity and is another acute-phase reactant.

Objective: To compare procalcitonin with C-reactive protein, a well-known acute-phase reactant, in a series of acutely febrile pediatric patients and to review recent literature on procalcitonin.

Methods: Procalcitonin and CRP levels were evaluated in 38 blood samples of pediatric patients who were admitted to the Dana Children’s Hospital for evaluation of unexplained fever or for sepsis work-up.

Results: The parallelism between procalcitonin and CRP was found to be highly significant (P<0.01).

Conclusion: The rise of procalcitonin blood levels in febrile pediatric patients suggests that it is part of the acute-phase reaction, parallel with the CRP reaction.