Human placenta-derived adherent cells (PDAC cells) are a culture expanded, undifferentiated mesenchymal-like population derived from full-term placental tissue, with immunomodulatory and anti-inflammatory properties. PDA-001 (cenplacel-L), an intravenous formulation of PDAC cells, is in clinical development for the treatment of autoimmune and inflammatory diseases. To elucidate the mechanisms u...

CTLA4-Ig (Belatacept) is a new recombinant molecule that interferes with the signal of T lymphocyte activation and prevents acute rejection after renal transplantation. HLA-G acts as a naturally tolerogenic molecule in humans. In this study, we analyzed whether HLA-G contributes to CTLA4-Ig-mediated graft acceptance. Our results demonstrate that patients treated with CTLA4-Ig displayed signific...

In this report, we studied T cell responses to a prostate cancer Ag by adoptively transferring tumor Ag-specific T cells into prostate tumor-bearing mice. Our findings demonstrate that CD8 ؉ T cells initially encountered tumor Ag in the lymph node and underwent an abortive proliferative response. Upon isolation from the tumor, the residual tumor-specific T cells were functionally tolerant of tu...

Dendritic cells (DCs) can initiate immune responses or confer immune tolerance depending on functional status. LPS-induced DC maturation is defined by enhanced surface expression of CD80 and CD86. MicroRNAs are critical for the regulation of DC function and immunity, and the microRNA let-7i was upregulated during LPS-induced DC maturation. Downregulation of let-7i significantly impeded DC matur...

The unique immunologic environment of the liver, together with its anatomic location downstream of the gut, influences the maturation and function of its interstitial dendritic cell (DC) populations. These well-equipped, antigen-presenting cells play critical roles in regulation of innate and adaptive immunity. New information is emerging about the molecular regulation of liver DC maturation an...

allergen-specific immunotherapy (ait) has been recently considered as an alternative approach to ameliorate the symptoms of allergen exposure and improvement the patients’ quality of life. dendritic cells (dc) in the forms of tolerogenic or th1-induced cells have been investigated in several studies as one of the promising approaches of ait in allergic diseases. the aim of this study was to eva...

OBJECTIVES Garlic (Allium sativum) is known as a potent spice and a medicine with broad therapeutic properties ranging from antibacterial to anticancer, and anticoagulant. One of the major purified garlic protein components is the 47 kDa protein. In this study, the effect of 47 kDa protein extracted from aged garlic (AGE) was evalua. MATERIALS AND METHODS Forty seven kDa protein was purified ...

Adoptive cellular immunotherapy using in vitro expanded CD8+ T cells shows promise for tumour immunotherapy but is limited by eventual loss of function of the transferred T cells through factors that likely include inactivation by tolerogenic dendritic cells (DC). The co-inhibitory receptor programmed death-1 (PD-1), in addition to controlling T-cell responsiveness at effector sites in malignan...

Dendritic cells (DCs) were first described by Steinman and Cohn in 1973 (1) as cells provided of efficient antigen-presenting capacity. Steinmann received the Nobel Prize in 2011 for having revealed the pivotal role of DCs in linking innate and adaptive immunity and initiating antigen-specific immunity (2). The work conducted by Steinman was also instrumental in determining the role of DCs not ...

In the last years, dendritic cells (DC) have been evaluated for antitumor vaccination. Although DC-based vaccines have raised great expectations, their clinical translation has been largely disappointing. For these results, several explanations have been proposed. In particular, the concomitant expression by DCs of tolerogenic pathways, such as the immunosuppressive agent indoleamine 2,3-dioxyg...