Phenotypic and metabolic characteristics of monocytes and granulocytes in normal pregnancy and maternal infection
ABSTRACT Normal pregnancy has been proposed to be a state of physiologic activation of the innate limb of the immune response. Recent studies have concluded that normal pregnancy produces inflammatory changes in peripheral blood leukocytes akin to those of sepsis. This unexpected observation has implications that are critical to understanding the susceptibility of pregnant women to sepsis, the pathophysiology of preeclampsia, and the biology of normal pregnancy. This study was designed to examine the phenotypic and metabolic characteristics of monocytes and granulocytes in normal pregnancy and in pregnant patients with acute infection.
A cross-sectional study was conducted that included nonpregnant women (n = 20), normal pregnant women (n = 57), and pregnant women with a positive blood culture and/or pyelonephritis (n = 16). Phenotypic and metabolic characteristics of monocytes and granulocytes were studied with the use of flow cytometry and monoclonal antibodies against surface markers (CD11b, CD14, CD15, CD16, CD18, CD49d, CD62L, CD64, CD66b, and HLA-DR). Intracellular reactive oxygen species were measured at basal conditions and after stimulation (oxidative burst). The stimulation index (ratio of intracellular reactive oxygen species after oxidative burst over basal state) was calculated. Nonparametric statistics were used. A probability value of <.01 was considered statistically significant.
Granulocytes from normal pregnant women had a higher median mean channel brightness for CD14 and CD64, but lower median mean channel brightness for CD16 and HLA-DR than granulocytes of nonpregnant women. Granulocytes of patients with acute infection had a higher median mean channel brightness for CD64 and CD66b than granulocytes of normal pregnant women. Monocytes from patients with acute infection had a higher mean channel brightness for CD11b, CD16, CD18, CD49d, CD64, and CD66b than monocytes of normal pregnant women. Baseline intracellular reactive oxygen species, oxidative burst, and stimulation index values were significantly higher in the granulocytes and monocytes of normal pregnant women than in the granulocytes and monocytes of nonpregnant women. Similarly, baseline intracellular reactive oxygen species, oxidative burst, and stimulation index values were higher in women with acute infections than in normal pregnant women.
Normal pregnancy was associated with phenotypic and metabolic changes of granulocytes and monocytes; pregnant women with acute infection had more marked phenotypic and metabolic changes of leukocytes than normal pregnant women. These qualitative differences indicate that the innate limb of the immune response is not maximally activated during normal pregnancy.
- SourceAvailable from: José Francisco Tellez-Zenteno
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- "It is possible that these depressed leukocyte functions of pregnant women account in part for the improvement observed in some autoimmune diseases. It may also explain the increased susceptibility to certain infections . On the other hand it is well known that some diseases could exacerbate during the pregnancy. "
ABSTRACT: The myasthenia gravis is twice as common in women as in men and frequently affects young women in the second and third decades of life, overlapping with the childbearing years. Generally, during pregnancy in one third of patients the disease exacerbates, whereas in two thirds it remains clinically unchanged. Complete remission can occur in some patients. To describe the clinical course, delivery and neonatal outcome of 18 pregnant women with the diagnosis of myasthenia gravis. Retrospective chart review of pregnant patients with myasthenia gravis, followed at the National Institute of Perinatology in Mexico City over an 8-year period. Data was abstracted from the medical records on the clinical course during pregnancy, delivery and neonatal outcome. From January 1, 1996 to December 31, 2003 18 patients with myasthenia gravis were identified and included in the study. The mean +/- SD maternal age was 27.4 +/- 4.0 years. During pregnancy 2 women (11%) had an improvement in the clinical symptoms of myasthenia gravis, 7 women (39%) had clinical worsening of the condition of 9 other patients (50%) remained clinically unchanged. Nine patients delivered vaginally, 8 delivered by cesarean section and 1 pregnancy ended in fetal loss. Seventeen infants were born at mean +/- SD gestational age of 37.5 +/- 3.0 weeks and a mean birth weight of 2710 +/- 73 g. Only one infant presented with transient neonatal myasthenia gravis. No congenital anomalies were identified in any of the newborns. The clinical course of myasthenia gravis during pregnancy is variable, with a significant proportion of patients experiencing worsening of the clinical symptoms. However, neonatal transient myasthenia was uncommon in our patient population.BMC Musculoskeletal Disorders 02/2004; 5(1):42. DOI:10.1186/1471-2474-5-42 · 1.90 Impact Factor
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ABSTRACT: Host defense against infection and disease relies on the reciprocal communication between the immune and neuroendocrine systems where sex hormones exert negative and positive feedback actions on immune functions. Indeed, sex hormones have been implicated in gender dimorphic immune response and in the potentiation of immune-related disorders. The female hormone estrogen plays a role as an immunomodulator and may exert immunosuppressive and immunostimulatory effects. Though many studies focus on estrogen's role in immunity within the female reproductive tract and autoimmunity, the modulatory effects of estrogen on vaccine responses are largely unexplored. The insufficient efficacy of some vaccines in certain target populations, as for example the elderly population, is well recognized. Hormones fluctuate throughout an individual's life, and females in particular undergo several necessary reproductive (pregnancy and menopause) and lifestyle (oral contraceptive use) changes which involve sex hormones. Vaccine efficacy might be influenced by endogenous estrogen levels or by exogenous estrogen administration. Therefore, in the pursuit of improved vaccine efficacy, it is necessary to