Dendritic cell-based therapy: a review focusing on antigenic selection.

Recently, technologies have developed that allow for the culturing of antigen-presenting cells (APC), such as dendritic cells (DC). The normal function of these cells is to present antigens to T cells, which then specifically recognize and ultimately eliminate the antigen source. Over the past number of years, these cells have been used in a variety of different immunotherapeutic strategies. Paramount in the success of such endeavors is the generation of desired T cell responses through the selection of appropriate antigens. This paper will serve to discuss the development and current status of dendritic cell-based therapy focusing on antigen selection for cancer.

Routine screening for postpartum depression.

BACKGROUND: Postpartum depression (PPD) is a common and often overlooked condition. Validated screening tools for PPD exist but are not commonly used. We present the 1-year outcome of a project to implement universal PPD screening at the 6-week postpartum visit. METHODS: Universal screening with the Edinburgh Postnatal Depression Scale (EPDS) was implemented in all community postnatal care sites. One-year outcome assessments (diagnosis and treatment of PPD) were completed for a sample of the women screened using medical record review of all care they received during the first year postpartum. RESULTS: Sixty-eight (20%) of the 342 women whose medical records were reviewed had been given a documented diagnosis of postpartum depression, resulting in an estimated population rate of 10.7%. Depression was diagnosed in 35% of the women with elevated EPDS scores (> or =10) compared with 5% of the women with low EPDS scores (<10) in the first year postpartum. Treatment was provided for all women diagnosed with depression, including drug therapy for 49% and counseling for 78%. Four women were hospitalized for depression. Some degree of suicidal ideation was noted on the EPDS by 48 women but acknowledged in the chart of only 10 women, including 1 with an immediate hospitalization. The rate of diagnosis of postpartum depression in this community increased from 3.7% before the routine use of EPDS screening to 10.7% following screening. CONCLUSIONS: A high EPDS score was predictive of a diagnosis of postpartum depression, and the implementation of routine EPDS screening at 6 weeks postpartum was associated with an increase in the rate of diagnosed postpartum depression in this community.

Evaluation of the developmental toxicity of 60 Hz magnetic fields and harmonic frequencies in Sprague-Dawley rats.

Experimental data suggest that exposure to the 50 and 60 Hz sinusoidal components of power-frequency magnetic fields (MFs) does not have an adverse impact on fetal development. However, the possible developmental toxicity of MF harmonics has not been investigated. This study was designed to determine whether exposure to 180 Hz MFs (third harmonic), alone or in combination with 60 Hz MFs, induces birth defects in Sprague-Dawley rats. Groups of sperm-positive dams (> or =20/group) were exposed for 18.5 h per day from gestation days 6 through 19 to (1) ambient MFs only (<0.0001 mT; sham controls); (2) 60 Hz MFs at 0.2 mT; (3) 180 Hz MFs at 0.2 mT; or (4) 60 Hz + 180 Hz MFs (10% third harmonic; total field strength = 0.2 mT). Litter size, litter weight, percentage live births, sex ratio, and number of resorption sites were determined for each dam, and gross external, visceral, cephalic and skeletal examinations were performed on all fetuses. MF exposure had no significant effects on litter size, litter weight, or fetal development. With the exception of common rib variants, the incidence of fetal anomalies was comparable in all groups. A small increase in the incidence of rib variants was seen in the group exposed to 60 Hz + 180 Hz MFs; however, the incidence of rib variants in this group was similar to that in historical controls from our laboratory. These data extend the existing database on developmental toxicity of MFs by demonstrating that exposure to 180 Hz MFs, either alone or superimposed on an underlying 60 Hz signal, does not induce biologically significant developmental toxicity. These data do not support the hypothesis that exposure to power-frequency MFs is an important risk factor for fetal development.

Incidence of postpartum depression in Olmsted County, Minnesota. A population-based, retrospective study.

OBJECTIVE: To provide population-based data on the recognition of postpartum depression by reviewing diagnostic and treatment practices of all physicians caring for pregnant and postpartum women in Olmsted County, Minnesota. STUDY DESIGN: We reviewed the medical charts of a random sample of 403 Olmsted County women who gave birth in 1993. Using outpatient and hospital medical records, we recorded all documented symptoms and diagnoses of depression, drug therapy for depression and variables that were previously associated with postpartum depression, during pregnancy and for one year postpartum. RESULTS: Fifteen (3.7%) of the women were identified as having postpartum depression during the year following delivery. Two (0.5%) other women had preexisting depression that did not remit before delivery. We found significant associations between postpartum depression and young maternal age, single marital status, hyperemesis gravidarum, tobacco or illegal drug use during pregnancy, history of substance abuse, high utilization of emergency department services and previous affective disorder. Using multivariate analysis with stepwise logistic regression, only single marital status, previous affective disorder and high utilization of emergency services remained associated with postpartum depression. CONCLUSION: The incidence of postpartum depression was significantly below incidences seen in prospective studies. Systematic screening for postpartum depression may be appropriate in this population.

Population-based screening for postpartum depression.

OBJECTIVE: To estimate the community prevalence in Olmsted County, Minnesota of elevated scores on the Edinburgh Postnatal Depression Scale, a self-report screening tool for postpartum depression. METHODS: At the 6-week postpartum visit, the Edinburgh Postnatal Depression Scale was administered to women who gave birth in Olmsted County between July 28, 1997 and March 28, 1998. Study sites included all ambulatory clinics that provide pregnancy care in the county, and women who missed postpartum visits were contacted by mail. A threshold of 12 or more points on the scale was selected for clinical use; data for scores of ten and above were also examined. RESULTS: Of the 909 Olmsted County women studied (response rate 83.2%), 11.4% (n = 104) had scores of 12 or greater, with a 95% confidence interval (CI) of 9.4%, 13.5%. The percentage of women with a positive screen increased to 19.8% (n = 180; 95% CI 17.2%, 22.4%) when scores of 10 or higher were included, as has been recommended for screening in primary care settings. Forty-eight or 5.3% of the subjects (95% CI 3.8%, 6.7%) indicated experiencing suicidal ideation during the previous week. CONCLUSION: More than 11% of women had elevated scores on the Edinburgh Postnatal Depression Scale, indicating a high likelihood of postpartum depression and the need for further assessment. The screening process required little extra time and was acceptable to the subjects and clinicians. Screening for postpartum depression is appropriate and feasible for clinical practice and increases the identification of women suffering from this serious, common, and highly treatable disorder.