Prenatal Care via Telehealth.

During the COVID-19 pandemic, providers and patients explored the use of telehealth on a wide and rapid scale. Reflecting on how prenatal providers and pregnant patients used telehealth during the pandemic and afterward, we review existing and new lessons learned from the pandemic. This article summarizes international and national guidelines on prenatal care, presents practice examples on how telehealth and remote patient monitoring were used during the COVID-19 pandemic, and offers lessons learned and suggestions for future care.

Are antipsychotics effective adjunctive Tx for patients with moderate-to-severe depression?

YES. Augmentation with second generation antipsychotics, especially aripiprazole and quetiapine, appears to be effective in patients with moderate-to-severe depression who have had a suboptimal response to a selective serotonin reuptake inhibitor or a serotonin-norepinephrine reuptake inhibitor (strength of recommendation [SOR]: A, based on a systematic review of randomized controlled trials [RCTs] and an individual RCT). Augmenting antidepressant therapy with cariprazine, ziprasidone, or olanzapine also appears to improve depressive symptoms over the short term. All antipsychotics studied carried an increased likelihood of adverse effects that could lead to discontinuation (SOR: A, based on a systematic review of RCTs).

A Family Medicine Residency Program's Response to an Impending COVID-19 Surge.

The University of Colorado family medicine residency watched along with the rest of the nation as the first cases of COVID-19 were being reported in the United States in March 2020. Concern grew as epidemiological models began to predict alarming hospital bed shortages for the state. Massive scheduling adjustments were needed as faculty and residents found themselves in groups at high risk for severe COVID-19 and residents found themselves dismissed from nonessential learning experiences in an effort to conserve personal protective equipment and limit exposures. A dedicated surge team was formed to tackle these issues while continuing to support our goals of maximizing patient safety, resident education, and physician wellness. The surge team created a plan that was implemented in 2 main phases. Phase 1 assumed business as usual with increased layers of backup for both residents and faculty. Phase 2 redistributed unassigned residents and inpatient faculty to increase capacity for adult medicine and COVID-19 patients on our essential services. Lessons learned from these surge efforts may help inform similar decisions being made by other residency programs presently and in the future.

Persistent Simian Immunodeficiency Virus Infection Drives Differentiation, Aberrant Accumulation, and Latent Infection of Germinal Center Follicular T Helper Cells.

UNLABELLED: CD4(+) follicular T helper (Tfh) cells play a prominent role in humoral immune responses, but the mechanisms of their accumulation and infection in AIDS remain unclear. Here we found that germinal center (GC) Tfh cells, defined here as CXCR5(+) PD-1(HIGH) CD4(+) T cells, do not express the HIV coreceptor CCR5 yet serve as a latent reservoir in GCs. With disease progression, an expansion of GC Tfh cells is accompanied by increases in dysfunctional CD8(+) T cells. In contrast, Tfh precursor (CXCR5(-) CD4(+) T) cells in lymph nodes do express CCR5 and differentiate into GC Tfh cells following interleukin-6 (IL-6) and IL-21 stimulation, and viral DNA is detectable in fully differentiated GC Tfh cells ex vivo. This suggests that SIV-infected GC Tfh cells may be derived from Tfh precursor cell subsets that become infected in marginal zones and then migrate into GCs as fully mature GC Tfh cells that serve as persistent virus reservoirs. These findings suggest that viral persistence in lymph nodes drives compensatory differentiation, aberrant accumulation, and latent infection of GC Tfh cells, resulting in marked impairment of humoral immune responses. IMPORTANCE: Generation of antibodies that can effectively eliminate viruses requires interactions of B cells with highly specialized T cells in GCs of lymphoid tissues called follicular T helper cells. Here we show that in simian immunodeficiency virus infection, these cells are initially infected in a precursor stage that leads to alterations in their homing, accumulation, and function that may be responsible for the inability of human immunodeficiency virus-infected patients to generate effective antibody responses.

Persistent Simian Immunodeficiency Virus Infection Causes Ultimate Depletion of Follicular Th Cells in AIDS.

CD4(+) T follicular helper (Tfh) cells are critical for the generation of humoral immune responses to pathogenic infections, providing help for B cell development, survival, and affinity maturation of Abs. Although CD4(+) Tfh cells are reported to accumulate in HIV or SIV infection, we found that germinal center Tfh cells, defined in this study as CXCR5(+)PD-1(HIGH)CD4(+) T cells, did not consistently accumulate in chronically SIV-infected rhesus macaques compared with those infected with less pathogenic simian HIV, vaccinated and SIVmac-challenged, or SIVmac-infected Mamu-A*01(+) macaques, all of which are associated with some control of virus replication and slower disease progression. Interestingly, CXCR5(+)PD-1(HIGH) Tfh cells in lymphoid tissues were eventually depleted in macaques with AIDS compared with the other cohorts. Chronic activation and proliferation of CXCR5(+)PD-1(HIGH) Tfh were increased, but PD-L2 expression was downregulated on B cells, possibly resulting in germinal center Tfh cell apoptosis. Together, these findings suggest that changes in CXCR5(+)PD-1(HIGH) Tfh cells in lymph nodes correlate with immune control during infection, and their loss or dysregulation contribute to impairment of B cell responses and progression to AIDS.