1 μCi/106 cells of Na251CrO4 for 90 min at 37° and, where indicated, were pulsed for 45 min with 10−6 m of the different peptides at 37°. Cells were then washed,
and 4 × 103 cells were used as targets of each CTL at different effector to target ratios. The per cent specific lysis was calculated as 100 × [(c.p.m. sample)−(c.p.m. medium)/(c.p.m. Triton X-100)−(c.p.m. medium)], where c.p.m. represents counts/min. Spontaneous release was always < 20% in all cases. None of the tested peptides affected spontaneous release. Enzyme-linked immunosorbent spot-forming cell assay [ELISPOT; for interferon-γ (IFN-γ)] was carried out using commercially available kits (Becton-Dickinson, Franklin Lakes, NJ) according to the manufacturer’s instructions. buy JQ1 find more In brief, 96-well nitrocellulose plates were coated with 5 μg/ml anti-IFN-γ, and maintained at 4° overnight. The following day the plates were washed four times with PBS and blocked for 2 hr with 10% fetal bovine serum-supplemented RPMI-1640 at 37°. The CTLs were added to the wells (in triplicate) at a ratio of 10 : 1 and incubated
with target cells at 37° for 24 hr. Controls were represented by cells incubated with concanavalin A (Sigma-Aldrich, St Louis, MO; 5 μg/ml) (positive control), or with the medium alone (negative control). Spots were read using an ELISPOT reader (A.EL.VIS GmbH, Hannover, Germany). Results are expressed as net number of spot-forming units/106 cells.15 Surface expression of HLA-ABC molecules was detected by indirect immunofluorescence using anti-human HLA-ABC mouse monoclonal antibody (BD Pharmingen, San Diego, CA). Mean logarithmic fluorescence intensity was determined by FACS analysis (Bryte HS; Bio-Rad, Milan, Italy).13 It has been previously demonstrated that the HPV epitope, derived from the EBNA1 antigen (amino acid 407–417) and presented by HLA-B35 and HLA-B53 alleles of the B5 cross-reactive group, is one of the targets of EBNA1-specific Phosphatidylethanolamine N-methyltransferase CTL responses in healthy EBV-seropositive individuals.20 To identify specific responses to this epitope and to obtain HPV-specific CTL cultures for further evaluation, we investigated the presence of HPV-specific memory CTL responses in a panel of HLA-B35
healthy EBV-seropositive individuals. To this end, PBLs obtained from nine healthy HLA-B35 positive, EBV-seropositive donors (Table 1) were stimulated with the HPV peptide.24 As control, parallel stimulations were performed using the HLA-B35-presented YPL epitope derived from the EBNA3A antigen.5 The specificity of CTL cultures was tested after three stimulations using standard 51Cr-release assays against autologous PHA-blasts, pulsed or not with the relevant synthetic peptide. As shown in Fig. 1, HPV-pulsed PHA blasts were efficiently lysed by representative CTL cultures obtained from donors 5, 6, 7 and 8. Three of these donors also responded to the YPL epitope. Overall, these stimulations yielded HPV-specific CTL responses in six of the nine donors tested (Table 1).
know that patients dialysing Selleckchem Ceritinib with a venous dialysis catheter are at greater risk of thrombosis. With some trial and error, the right dose of anticoagulant for any patient can be empirically determined. In normal circumstances effective and safe anticoagulation for haemodialysis can be delivered with low risk and high efficiency. The use of UF heparin, which is the most common agent used in Australia, is safe, simple and inexpensive and usually encounters few problems. However, there are risks with haemodialysis anticoagulation which are important to be aware of and which of course include the risk of bleeding. Some risks are not immediately obvious – such as inadvertent over-anticoagulation in high-risk patients because of excessive heparin volume used to lock the venous dialysis catheter at the end of dialysis. The disadvantages of UF heparin may include lack of
routine or accurate monitoring of anticoagulation effect, the need for an infusion pump and the costs of nursing time. Perhaps the most important risk is that of heparin-induced thrombocytopaenia (HIT Type II), which is greatest with the use of UF heparin. At times the routine anticoagulation prescription needs to be varied. Additional choices include ‘no heparin’ dialysis, the use of low-molecular-weight heparin (LMWH) instead buy Sunitinib of UF heparin, and the use of regional anticoagulation. New agents and new clinical variations appear in the literature continuously. Dialysis without anticoagulation may be indicated in patients with a high risk of bleeding, an acute
bleeding disorder, a recent head injury, planned major surgery, trauma, acute HIT syndrome or in patients below with systemic anticoagulation for other reasons. The procedure involves multiple flushes of 25–50 ml of saline every 15–30 min, in association with a high blood flow rate. In some units the lines are pretreated with 2000–5000 U of UF heparin and then flushed with 1 l of normal saline, to coat the lines. This form of dialysis anticoagulation is very labour-intensive and these efforts are usually only partially effective. Partial clotting still occurs in 20% of cases with complete clotting of lines or dialyser, requiring line change, in 7% of ‘no heparin’ dialyses.7,8 The risk of clotting in this setting may be exacerbated by poor access blood flow, the use of a venous catheter, hypotension or concomitant blood transfusion. Where a venous catheter is used, there is an increased risk of catheter occlusion. ‘No heparin’ dialysis may also provide less effective dialysis and result in lower clearances. Unfractionated heparin was first isolated from liver (hepar) mast cells of dogs. UF heparin consists of a family of highly sulphated polysaccharides composed of anionic glycosaminoglycans. Heparin is now commercially derived from porcine intestinal mucosa or bovine lung.
While Treg cell frequency was normal, its inhibitory function was absent before therapy and was partially recovered 6 months after abatacept. B
and Treg cell function is impaired in RA patients not responding to the first anti-TNF-α agent. Abatacept therapy was able to rescue immune function and led to an effective and safe clinical outcome, suggesting that RA patients, in whom anti-TNF-α failed, are immunologically MK0683 in vivo prone to benefit from an agent targeting a different pathway. “
“Citation Wang Y, Fan R, Gu Y, Adair CD. Digoxin immune Fab protects endothelial cells from ouabain-induced barrier injury. Am J Reprod Immunol 2012; 67: 66–72 Problem Endogenous digitalis-like factors (EDLF) inhibit sodium pump Na+/K+ATPase activity, and maternal EDLF levels are elevated in preeclampsia (PE). This study determined whether digoxin immune Fab (DIF) could protect endothelial cells (ECs) from EDLF-induced endothelial barrier dysfunction. Method of study ECs were treated with escalating doses of ouabain
(a known EDLF) in the presence or absence of DIF. EC barrier integrity was examined by junction protein VE-cadherin and occludin expressions. EC permeability was determined by horseradish-peroxidase (HRP) leakage and BVD-523 chemical structure transendothelial electrical resistance (TEER). Results EC junction protein VE-cadherin distribution was disrupted in cells treated with ouabain. DIF, but not control IgG Fab fragment, blocked ouabain-induced decreases in VE-cadherin and occludin expressions
and prevented ouabain-induced HRP leakage and TEER changes. Conclusion DIF protects ECs from ouabain-induced barrier injury, providing evidence of beneficial effects of DIF on EC function and supporting that Na+/K+ATPase might be a therapeutic target to ameliorate endothelial dysfunction. “
“Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA Immunity to tumor differentiation Telomerase antigens, such as melanoma antigen recognized by T cells 1 (MART-1), has been comprehensively studied. Intriguingly, CD8+ T cells specific for the MART-126(27)-35 epitope in the context of HLA-A0201 are about 100 times more abundant compared with T cells specific for other tumor-associated antigens. Moreover, MART-1-specific CD8+ T cells show a highly biased usage of the Vα-region gene TRAV12–2. Here, we provide independent support for this notion, by showing that the combinatorial pairing of different TCRα- and TCRβ- chains derived from HLA-A2–MART-126–35-specific CD8+ T-cell clones is unusually permissive in conferring MART-1 specificity, provided the CDR1α TRAV12–2 region is used. Whether TCR bias alone accounts for the unusual abundance of HLA-A2–MART-126–35-specific CD8+ T cells has remained conjectural.
The clinical experience just reviewed outlines the difficulties of treating patients with established T1D. The preventive effect of infections on the progression of β cell aggression, which represents the basis of the hygiene hypothesis, applies to the early phases of the natural history of the disease . It is thus logical to postulate that intervention aimed at ‘reprogramming’ the β cell-specific autoimmune response, as did infections in
the past, might represent a simple and robust way to prevent T1D, inasmuch as the treatment proposed is totally safe (because by definition it will concern Cobimetinib molecular weight very young and still ‘healthy’ subjects). The search for such treatments is strictly dependent upon a better understanding of the immune mechanisms underlying the hygiene hypothesis. Subsets of helper CD4+ T lymphocytes could be identified https://www.selleckchem.com/products/epacadostat-incb024360.html on the basis of the array of cytokines they produced. T helper type 1 (Th1) CD4+ T cells produce preferentially interleukin (IL)-2 and interferon (IFN)-γ that essentially support T cell growth, macrophage activation and cell-mediated immunity. Th2 cells produce IL-4, IL-6, IL-10 and IL-13, which contribute to antibody production. More recently described Th17 cells are a major source of IL-17 and IL-21.
The development of most autoimmune diseases involves cell co-operation processes with Th1 and Th17 CD4+ cells, whereas the development of allergic diseases requires IL-4 and IL-5 produced by Th2 cells. Based on initial reports pointing to the reciprocal down-regulation of Th1 and Th2 cells, Florfenicol some authors have suggested that in developed countries the lack of microbial burden in early childhood, which normally favours strong Th1-biased immunity, redirects the immune response towards a Th2 phenotype
and therefore predisposes the host to allergic disorders. The problem with such an explanation was, however, that Th1 responses in the case of autoimmunity are not protective but pathogenic. These observations would fit with the concept of a common mechanism underlying infection-mediated protection against autoimmunity and allergy. Specialized subsets of T lymphocytes defined generally as regulatory T cells will be suitable candidates, as there is compelling data to show that they are highly effective in controlling both Th1- and Th2-mediated responses. A second mechanism with relevance to the influence of infection on allergy and autoimmunity is antigenic competition, in which the immune response to an antigen is decreased by a concomitant immune response against an unrelated antigen. The competition is maximal when the unrelated antigen is administered a few days after the administration of the first antigen.
4 mg dosage had higher age, daytime frequency, and lower peak urine flow rate. Patients receiving both 0.2 and 0.04
mg both showed improved clinical outcome measures. Higher improvement was found in voiding component symptom scores and urine flow rate improvement in patients receiving an increased dose. Conclusion: Both low- and intermediate-dose tamsulosin are effective treatment regimens. Increasing from low to intermediate dose should follow assessment of both objective and subjective improvements. “
“Objective: This study was conducted to examine the effect of discontinuing tamsulosin in patients with benign prostatic hyperplasia who had been receiving combination therapy with tamsulosin and dutasteride. Methods: The study sample consisted of 108 men with benign prostatic hyperplasia and lower urinary tract symptoms who visited our urology clinics between April 2008 and December 2010. All were assessed using the International Prostate Selleckchem Rucaparib Symptom Score (IPSS). The patients had IPSS of 8–19 and prostate volumes ≥25 mL by transrectal ultrasonography. They were put on tamsulosin and dutasteride, and the efficacy of this regimen was assessed every 12 weeks. After CX 5461 48 weeks, patients were divided at random into a group continuing to take the same drug combination (group 1) and a group taking only dutasteride
0.5 mg (group 2). Results: Sixty-nine of the original 108 patients completed the study, 36 (52%) in group 1 and 33 (48%) in group 2. The mean age of all patients was 67.96 ± 7.88 years why and mean prostatic volume was 40.45 ± 12.81 mL. Mean prostate-specific
antigen was 3.31 (0.4–9.9) ng/mL at the outset. The IPSS scores of the two groups at first visit, 48 and 72 weeks were, respectively, 14.69 versus 15.85 (P = 0.322), 12.08 versus 12.85 (P = 0.582) and 10.89 versus 11.06 (P = 0.897.) There was a statistically significant difference between the baseline and 72-week IPSS scores in both groups (group 1: P < 0.001, group 2: P < 0.001). Conclusion: In patients with moderate IPSS, discontinuing tamsulosin after 48 weeks of combined tamsulosin and dutasteride therapy has no significant effect on outcome. "
“Objectives: The short-term results for the tension-free vaginal tape procedure (TVT) and the transobturator tape procedure (TOT) for stress urinary incontinence (SUI) were compared using the preoperative maximum urethral closure pressure (MUCP). Methods: A total of 278 patients treated for SUI was considered: 165 who underwent TVT and 113 who underwent TOT retrospectively. The MUCP in a preoperative urodynamic study before and 3 months after surgery were evaluated. Results: At 3 months after TVT, 159 patients (96.4%) were cured and four patients failed. The mean MUCP of the patients who failed was 22.5 ± 5.3 cmH2O, which was significantly lower than that among the cured patients (P < 0.007). At 3 months after TOT, 100 patients (88.5%) were cured and seven patients failed. The mean MUCP of the patients who failed was 27 ± 6.
per 24 h at week 3, and 12.6 voids per 24 h at 8 weeks after final instillation. Urgency score INK 128 supplier also decreased from a pre-instillation mean of 1.75 (out of 10) to 1.07 8 weeks after the final instillation. Bladder ulcers noted by cystoscopy at baseline were absent at the 8 weeks post-treatment and no evidence of bladder inflammation was noted. Conclusion: Intravesical liposome instillation is minimally invasive and presents an appealing new treatment for IC/PBS. Prospective trials are needed to assess intravesical liposomes for IC/PBS. “
“To evaluate the intermediate-term clinical efficacy and success rate of tunica vaginalis (TV) pedicle flap for reconstruction of bulbo-penile urethral stricture. We assessed the medical records of 15 male patients who had undergone TV pedicle flap urethroplasty for reconstruction of anterior urethral stricture between January 2006 and December 2011. The surgical outcome was assessed by comparison of four parameters
including the maximum flow rate (Qmax), international prostate symptom score (IPSS), residual urine (RU) and quality of life (QOL) in all patients pre- and postoperatively. Moreover, pre- and postoperative retrograde urethrography films were compared in all patients. t-test was used for data analysis. The mean patient age was 38.1 ± 9.3 years (range: 25–55), mean stricture length was 4.2 ± 1.1 cm (range: 3–6.1 cm), and the mean follow up time was 14.6 ± 1.9 months (range: 12–18) months. PCI-32765 research buy http://www.selleck.co.jp/products/Etopophos.html There was a statistically significant difference between Q(max), IPSS, RU and QOL pre- and postoperatively (P < 0.01). The clinical success rate in this study was 86.6% (13/15). The early complication was one case of wound infection and subsequent wound dehiscence, one case of hematoma formation in another patient, which did not have any influence in the long-term clinical outcome. At intermediate-term follow up, TV pedicle flap urethroplasty has a high clinical success rate with low complication. However, a large clinical trial with long-term follow up is needed to confirm the result. The acquired urethral stricture
is a fibrotic narrowing, composed of dense collagen and fibroblast. Fibrosis usually extends into the surrounding corpus spogiosum and causes spongiofibrosis, narrowing the urethra, restricting urine and causing subsequent back pressure phenomena. The incidence rate of acquired urethral stricture was roughly estimated to be 0.6%, which is more common in elderly patients beyond 55 years of age. Despite relatively low incidence of stricture, the treatment is quite difficult and obtaining a satisfactory long-term outcome is a formidable challenge. A great variety of tissues has been tried as flaps or grafts to substitute the urothelium both experimentally and clinically. These include a mucosal graft, skin graft, intestinal sub mucosa graft, bladder mucosa and peritoneal graft.
7–12 Other observations underline the need to study the differences between human
and NHP immune responses: a humanized anti-CD28 monoclonal superagonist antibody caused severe side-effects in a phase 1 clinical trial;13 it induced a delayed and sustained Ca2+-influx in human CD4+ T cells, but not in CD4+ T cells from NHPs.14 Any experimental study of cellular, adaptive immune responses addresses also T-cell homeostasis, the active and dynamic process by which immune cells mature traffic and produce cytokines upon activation. Key elements of the analysis of adaptive cellular immune responses are (i) T-cell subsets (CD4/CD8, CD8αα+ memory T cells) in concert with differentiation and homing markers (CD45RA, CCR7, CD28, CD27, CD62L),15 cytotoxicity (measure of CD107a) and cytokine production (polyfunctionality);16 (ii) regulatory Idasanutlin mw T cells (Tregs);17 and (iii) the response to interleukin-7 (IL-7), a key cytokine for T-cell survival, homeostasis and T-cell memory.18 T-cell compartment composition and phenotype has been studied Selleck LDK378 previously in rhesus macaques19,20
with a limited panel of immune markers. Different combinations of immune markers were used in these studies to define memory and effector T-cell compartments in rhesus monkey.21 To our knowledge, the current report analyses for the first time the simultaneous expression of CD45RA, CCR7, CD27 and CD28 in T-cell subsets
in healthy rhesus monkeys. We took advantage of a high-content, multicolour flow cytometry to assess the distribution of immune cells in peripheral blood mononuclear cells (PBMCs) from female rhesus monkeys (defined by expression of CD45RA, CCR7, CD28, CD27, CD107a, IL-7 receptor α-chain), to compare cytokine [IL-2, interferon-γ (IFN-γ) and tumour necrosis factor-α (TNF-α)] production in T-cell subsets, IL-7-induced signal transducer and activator of transcription 5 (STAT-5) phosphorylation, and Treg frequencies. Peripheral blood was obtained from 16 healthy human donors (19–66 years, median 31 years) from the Blood Bank (Ethical Permit DNR 00-097). Peripheral blood was obtained from 27 female rhesus macaques (Macaca Staurosporine chemical structure mulatta) of Chinese origin with an age range between 3 and 4 years housed in the Astrid Fagraeus laboratory at the Swedish Institute for Infectious Disease Control. Housing of the animals and care procedures were in compliance with the provisions and general guidelines of the Swedish Animal Welfare Agency, the Local Ethical Committee responsible for Animal Experiments approved all procedures (protocol DNR238/2006-54). The PBMCs were isolated from freshly obtained, heparinized peripheral blood by Ficoll–Hypaque density gradient centrifugation. Immune marker analysis was performed on freshly isolated PBMCs by a standard Ficoll procedure from heparinized blood samples.
Immune suppression/evasion is one of the major impediments to the development of effective immune therapy for cancer. Programmed death-1 receptor (PD-1) is a member of the B7 family that is expressed on activated T cells and is found to play an important role in immune
ZD1839 purchase evasion. On binding its cognate ligands programmed death ligand (PDL)-1 or PDL-2, PD-1 down-regulates signaling by the T-cell receptor (TCR), inducing T-cell anergy and apoptosis and thus leading to immune suppression 1–6. Many human malignancies up-regulate PDL-1, and this up-regulation has been directly correlated with immune suppression and poor prognosis in several types of cancer 4, 7–11. The PD-1/PDL-1 interaction leads to suppression and apoptosis of tumor-infiltrating
effector lymphocytes in the tumor microenvironment 12, 13. Furthermore, PDL-1 was found to be an anti-apoptotic receptor on tumor cells, functioning as an “immune shield” and protecting tumor cells from T-cell cytotoxicity 14–16. More recently, it was found that blocking the PD-1/PDL-1 interaction promotes antigen-specific cytotoxic T lymphocyte (CTL) proliferation by heightening CTL resistance to Treg-cell buy Pexidartinib inhibition, and limiting the inhibitory ability of Treg cells 17. Treg cells are inhibitory CD4+ T cells that are increased in cancer patients and can potentially form a barrier to eliciting effective immune response 17–22. Not surprisingly, the inactivation or depletion of Treg cells has been actively pursued, in order to develop more potent anti-tumor immunotherapies. In several studies, antibodies against the CD25 cell surface marker have been used to examine the feasibility of enhancing anti-tumor responses through the inhibition of regulatory cell activity. Depletion of Treg cells by anti-CD25 antibodies has led to enhanced immunity in several tumor models 23–25. One major obstacle Protein tyrosine phosphatase for using this approach
is that activated CD4+ and CD8+ T cells also express CD25, and use of anti-CD25 antibodies might also affect these cells. Use of other cell markers, such as CTLA-4, may also be insufficient since it was previously demonstrated that Treg cells from CTLA-4 knockout mice maintain their suppressive function 26, 27. Cyclophosphamide (CPM) has been used as a standard alkylating chemotherapeutic agent against certain solid tumors and lymphomas because of its direct cytotoxic effect and its inhibitory activity against actively dividing cells 28. While high doses of CPM may lead to the depletion of immune cells, low doses of CPM have been shown to enhance immune responses and induce anti-tumor immune-mediated effects by reducing the number and function of Treg cells 27, 29–33. Here, we hypothesize that combining inhibition of Treg cells with strategies that block the PD-1/PDL-1 interaction and vaccine would result in a potent anti-tumor immunotherapeutic strategy.
n., submandibular lymph nodes, but not NALTs, were consistently Palbociclib clearly stained (Fig. 3, inset). These results taken together demonstrate that the submandibular lymph nodes are the main organ that responds to i.n. injected allergens. To explore the mechanisms of IgG Ab production and compare them with those of IgE Ab production in submandibular lymph nodes, we injected the allergen with or without complete Freund’s adjuvant i.n. once into BALB/c mice (Fig. 4). A significant amount of serum IgE (465.4 ±111.6 ng/mL; mean ± SD; n =9) was induced by one i.n. injection of allergen alone. In contrast, one i.n. injection
of the allergen with adjuvant induced a much smaller amount of serum IgE (172.5 ± 74.7ng/mL; mean ± SD; n =9). This was greater than that (57.6 ± 32.2 ng/mL; mean ± SD; n =9) in mice treated with adjuvant alone or that (40.8 ± 14.8 ng/mL; mean ± SD; n =9) in PBS-injected mice. In contrast, a large amount of serum IgG (1585.4 ± 161.0 μg/mL; mean ± SD; n =9) was induced by one i.n. injection
of the allergen with adjuvant into mice; this amount of serum IgG was greater than AZD6738 that obtained after one i.n. injection of adjuvant (1018.2 ±33.2 μg/mL; mean ± SD; n =9) or allergen (904.9 ± 51.2 μg/mL; mean ± SD; n =9) alone, both of which were greater than that (514.7 ± 161.8 μg/mL; mean ± SD; n =9) in PBS-injected mice. These results indicate that one i.n. injection of allergen alone or with adjuvant is suitable for induction of serum IgE or IgG Ab, respectively. To explore which population of cells in the submandibular lymph nodes is involved in the production of IgE Ab in response to the allergen, we separated the cells into macrophage-, lymphocyte-, and granulocyte-rich populations by Percoll density-gradient centrifugation. The yield of cells from the submandibular lymph nodes
was 78–89% (n =9). Fraction 3 (rich in lymphocytes) was the major (93.5 ± 7.2%; mean ± SD; n =9) population, Niclosamide followed by fraction 2 (rich in macrophages; 1.2 ± 0.1%; mean ± SD; n =9) and fraction 4 (rich in granulocytes; 0.3 ± 0.1%; mean ± SD; n =9) in that order. Fraction 1 (rich in somewhat damaged cells) contained a small number of cells. As we obtained the macrophage-, lymphocyte-, and granulocyte-rich fractions, we incubated various combinations of these cells for 6 days and then assessed the amounts of IgE Ab in the culture media (Fig. 5). Bulk submandibular lymph node cells from mice that had been treated with allergen once i.n. produced a significant amount of IgE Abs (6.2 ± 3.4 ng/mL; mean ± SD; n =9); whereas the lymphocyte-rich (fraction 3) fraction of the lymph node cells did not (1.5 ± 0.8 ng/mL; mean ± SD; n =9). The macrophage-rich (fraction 2) fraction was also inactive (1.1 ± 0.9 ng/mL; mean ± SD; n =9). Of particular interest, IgE Ab production (4.6 ± 2.8 ng/mL; mean ± SD; n =9) was restored by addition of the macrophage-rich fraction to the lymphocyte-rich fraction.
008 and P = 0.011, respectively) and the control group (P = 0.001). No difference, however, was observed in IFN-γ production among all four groups (data not shown). ABT263 Cutaneous lymphocyte antigen is highly expressed on skin-infiltrating T cells in inflammatory skin diseases, including allergic contact dermatitis and atopic dermatitis . The expressions of peripheral blood CD3+ CLA+ T cells were significantly increased in children with AD compared with those
in control subjects . We found that the infiltration of Df-induced CLA+ and CD3+ T cells (coloured green with cell surface) in NC/Nga mice was inhibited by combination therapy of glucosamine plus tacrolimus (FK-506) (Fig. 5A,B). In addition, there was no significant difference between the combination group and normal (no dermatitis) group. Atopic dermatitis has this website been treated by the regular use of corticosteroids, which is not a perfect treatment because sufficient results cannot be provided in a number of cases as a result
of adverse events such as steroid-induced skin atrophy. Therefore, identified combinations of immunosuppressive agents are expected to be among the important future strategies for improved treatment of AD. It has been reported that the use of combinations of immunosuppressive agents may be more effective than single-modality treatment with either agent. In this study, we found that combination therapy with immunosuppressive agent glucosamine plus tacrolimus (FK-506) has a synergistic effect on Df-induced atopic dermatitis-like skin lesions in NC/Nga mice. For instance, combination treatment with glucosamine plus tacrolimus (FK-506) improved the severity of the dermatitis with reduction
in inflammatory cellular infiltrate, such as mast cells and eosinophils. For each parameter, we have repeated the experiment once using the same number of animals per group and found a similar type of profile, indicating that the results are reproducible (data not shown). These results indicated that combination therapy suppressed the development of Df-induced dermatitis, probably by controlling various inflammatory cells including mast cells and eosinophils. Because Th2 cytokines induce proliferation and activation Tangeritin of mast cells as well as eosinophils in the skin, massive infiltration of mast cells and eosinophils would be expected in Df-induced NC/Nga mice, as previously reported . Th2 cytokines are considered to play a major role in the pathogenesis of AD . In fact, Th2 immune responses mediated by IL-4, IL-5 and IL-13 are critical in the pathogenesis of AD , because the upregulation of IgE production, one of the major causes of atopic inflammation, has been extensively studied with Th2 cytokines, IL-5 and IL-13. Moreover, Th2 cell numbers are increased in lesional tissue of patients who suffer from patients with AD frequently show elevated IgE levels in response to many kinds of allergens, including mite antigen .