Milk fat globule membrane(MFGM),which contains abundant glycoproteins and phospholipids,exerts beneficial effects on intestinal health and immunomodulation.The aim of this study was to evaluate the protective effects ...Milk fat globule membrane(MFGM),which contains abundant glycoproteins and phospholipids,exerts beneficial effects on intestinal health and immunomodulation.The aim of this study was to evaluate the protective effects and possible underlying mechanisms of MFGM on cow’s milk allergy(CMA)in aβ-lactoglobulin(BLG)-induced allergic mice model.MFGM was supplemented to allergic mice induced by BLG at a dose of 400 mg/kg body weight.Results demonstrated that MFGM alleviated food allergy symptoms,decreased serum levels of lipopolysaccharide,pro-inflammatory cytokines,immunoglobulin(Ig)E,Ig G1,and Th2 cytokines including interleukin(IL)-4,while increased serum levels of Th1 cytokines including interferon-γand regulatory T cells(Tregs)cytokines including IL-10 and transforming growth factor-β.MFGM modulated gut microbiota and enhanced intestinal barrier of BLG-allergic mice,as evidenced by decreased relative abundance of Desulfobacterota,Rikenellaceae,Lachnospiraceae,and Desulfovibrionaceae,while increased relative abundance of Bacteroidetes,Lactobacillaceae and Muribaculaceae,and enhanced expressions of tight junction proteins including Occludin,Claudin-1 and zonula occludens-1.Furthermore,MFGM increased fecal short-chain fatty acids(SCFAs)levels,which elevated G protein-coupled receptor(GPR)43 and GPR109A expressions.The increased expressions of GPR43 and GPR109A induced CD103+dendritic cells accumulation and promoted Tregs differentiation in mesenteric lymph node to a certain extent.In summary,MFGM alleviated CMA in a BLG-induced allergic mice model through enhancing intestinal barrier and promoting Tregs differentiation,which may be correlated with SCFAs-mediated activation of GPRs.These findings suggest that MFGM may be useful as a promising functional ingredient against CMA.展开更多
As the body’s integumentary system,the skin is vulnerable to injuries.The subsequent wound healing processes aim to restore dermal and epidermal integrity and functionality.To this end,multiple tissue-resident cells ...As the body’s integumentary system,the skin is vulnerable to injuries.The subsequent wound healing processes aim to restore dermal and epidermal integrity and functionality.To this end,multiple tissue-resident cells and recruited immune cells cooperate to efficiently repair the injured tissue.Such temporally-and spatially-coordinated interplay necessitates tight regulation to prevent collateral damage such as overshooting immune responses and excessive inflammation.In this context,regulatory T cells(Tregs)hold a key role in balancing immune homeostasis and mediating cutaneous wound healing.A comprehensive understanding of Tregs’multifaceted field of activity may help decipher wound pathologies and,ultimately,establish new treatment modalities.Herein,we review the role of Tregs in orchestrating the regeneration of skin adnexa and catalyzing healthy wound repair.Further,we discuss how Tregs operate during fibrosis,keloidosis,and scarring.展开更多
BACKGROUND: Although regulatory T cells(Tregs) are key to the maintenance of immunologic homeostasis and tolerance, little is known about Treg-mediated immunosuppression in the stage of sepsis. This article aimed to r...BACKGROUND: Although regulatory T cells(Tregs) are key to the maintenance of immunologic homeostasis and tolerance, little is known about Treg-mediated immunosuppression in the stage of sepsis. This article aimed to review the current literature on the role of Tregs in the pathophysiology of septic response, attempting to investigate the role of Tregs in immune dysfunction during sepsis.DATA SOURCES: A literature search was conducted in January 2014 using the China National Knowledge Infrastructure and Pub Med. Articles on the role of Tregs in immune dysfunction during sepsis were identified.RESULTS: The identified articles indicated that Treg levels can be used for the assessment of the course of sepsis. The inhibition of Treg activity can promote the recovery of immune function.CONCLUSION: Since the mechanism of Tregs is complex during the sepsis, more studies are needed.展开更多
Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistoc...Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistochemistry and real-time reverse trancription polymerase chain reaction (real-time RT-PCR) techniques to determine Foxp3+ Treg counts and the expression levels of Foxp3 mRNA and TSLP mRNA in thymomas of 23 MG patients and thymuses of 4 healthy controls. Results: The CD4+ Foxp3+ nTreg (natural regulatory T cells) counts in thymomas were significantly lower than those in normal thymuses (P<0.01), and the expression levels of Foxp3 mRNA and TSLP mRNA were also lower in thymomas(P<0.01). Among the thymoma types, type B1 thymoma had the highest Foxp3+ nTreg count and standard values of Foxp3 mRNA and TSLP mRNA. There was a strong positive correlation between the mRNA transcriptional levels of Foxp3 and TSLP. Conclusion: The insufficient expression of Foxp3 in thymoma, which may be caused by decreased transcription of TSLP, may result in the reduction of Tregs and cause autoimmune disorders.展开更多
Anthocyanin,as a typical food bioactive molecule,is capable of reversing inflammatory,oxidative and allergic condition thus contributes to intestinal health.We were wondering whether anthocyanin has influence on the i...Anthocyanin,as a typical food bioactive molecule,is capable of reversing inflammatory,oxidative and allergic condition thus contributes to intestinal health.We were wondering whether anthocyanin has influence on the infiltration of inflammatory cells into the intestinal mucosa and thus help enhancing intestinal barrier which could be damaged in some metabolic diseases.In this study,the influence of anthocyanin(administered orally)on the alterations(including structure and permeability)of the intestinal mucosa in mice in response to a high fat-high cholesterol(HFHC)diet was investigated.Primary T helper 17(Th17)cells were isolated from mouse intestine tissues to observe the modulatory role of anthocyanin through the transcription phosphorylated STAT 3(p-STAT3).The results indicated that anthocyanin significantly alleviated HFHC-induced impairment in the intestinal structures and permeability in a dose-dependent manner;moreover,anthocyanin appeared to inhibit HFHC induced the expression of p-STAT3,thereby disturbing Th17 cell differentiation.In high-fat diet(HFD,cholesterol level non-modified)-challenged mice selective p-STAT3 inhibitor significantly reversed the effects of anthocyanin,which were decreased amount of interleukin(IL)-17A(produced and released from Th17 cells)and the protected intestinal structure/function.In summary,the results of this study suggest that anthocyanin may attenuate the damage of intestinal barrier in HFHC mice through regulating intestinal STAT3-Th17-IL-17A signal transduction pathway.展开更多
The intestinal immune system maintains tolerance to harmless food proteins and gut microbiota through peripherally derived RORγt+Tregs(pTregs),which prevent food intolerance and inflammatory bowel disease.Recent stud...The intestinal immune system maintains tolerance to harmless food proteins and gut microbiota through peripherally derived RORγt+Tregs(pTregs),which prevent food intolerance and inflammatory bowel disease.Recent studies suggested that RORγt+antigen-presenting cells(APCs),which encompass rare dendritic cell(DC)subsets and type 3 innate lymphoid cells(ILC3s),are key to pTreg induction.Here,we developed a mouse with reduced RORγt+APCs by deleting a specific cis-regulatory element of Rorc encoding RORγt.Single-cell RNA sequencing and flow cytometry analyses confirmed the depletion of a RORγt+DC subset and ILC3s.These mice showed a secondary reduction in pTregs,impaired tolerance to oral antigens,and an increase in T helper(Th)2 cells.Conversely,ILC3-deficient mice showed no pTregs or Th2 cell abnormalities.Lineage tracing revealed that RORγt+DCs share a lymphoid origin with ILC3s,consistent with their similar phenotypic traits.These findings highlight the role of lymphoid RORγt+DCs in maintaining intestinal immune balance and preventing conditions like food allergies.展开更多
目的探讨儿童过敏性鼻炎(allergic rhinitis,AR)和支气管哮喘(bronchial asthma,BA)患儿外周血高迁移率族蛋白B1(high mobility group box 1,HMGB1)水平与辅助性T细胞17(T helper 17 cell,Th17)和调节性T细胞(regulatory T cell,Treg)...目的探讨儿童过敏性鼻炎(allergic rhinitis,AR)和支气管哮喘(bronchial asthma,BA)患儿外周血高迁移率族蛋白B1(high mobility group box 1,HMGB1)水平与辅助性T细胞17(T helper 17 cell,Th17)和调节性T细胞(regulatory T cell,Treg)的比例(Th17/Treg)的相关性。方法采用前瞻性研究方法,选取2023年3月至12月在解放军总医院第七医学中心门急诊就诊患儿及健康体检者共113例作为研究对象,按照临床症状分成健康对照组(n=25)、过敏性鼻炎组(AR组,n=28)、支气管哮喘组(BA组,n=31)和两者并有组(AR+BA组,n=29),比较4组肺功能、免疫球蛋白E(immunoglobulin E,IgE)、白细胞介素(interleukin,IL)-17、HMGB1水平和Th17/Treg比例。统计学方法采用t检验、方差分析和Pearson相关性分析。结果各组的第1秒用力呼气容积(forced expiratory volume in the first second,FEV1)的结果显示,健康对照组高于AR组、BA组和AR+BA组[(96.4±2.5)%、(90.7±4.9)%、(88.6±4.1)%、(82.1±5.5)%,F=47.193,P值均<0.001],显示AR和BA患儿肺功能可能变差。AR组、BA组和AR+BA组HMGB1水平高于健康对照组[(30.4±12.4)mg/L、(47.2±17.8)mg/L、(51.4±21.8)mg/L、(4.3±2.1)mg/L,F=48.896,P值均<0.001]。AR组、BA组和AR+BA组Th17/Treg比例高于健康对照组(0.68±0.14、0.71±0.14、1.36±0.40、0.30±0.07,F=105.547,P值均<0.001)。Pearson相关性分析结果显示,HMGB1与Th17(r=0.521,P<0.001)、Th17/Treg(r=0.419,P<0.05)、IgE(r=0.502,P<0.05)、IL-17(r=0.472,P<0.05)呈正相关,与FEV1(r=-0.645,P<0.001)呈负相关。结论在儿童AR合并BA的发病过程中,HMGB1水平及Th17细胞百分比增加,而Treg细胞百分比降低,Th17/Treg比例存在失衡的情形,HMGB1水平与Th17细胞百分比、Th17/Treg比例、IgE、IL-17及FEV1存在一定的相关性,HMGB1和Th17/Treg的动态平衡可能通过影响细胞因子的表达而起到一定的调节作用。展开更多
Many studies have shown that the development of allergic asthma is associated with intestinal microbiota dysbiosis.Based on the gut-lung axis theory,probiotic intervention may be a potential strategy for respiratory d...Many studies have shown that the development of allergic asthma is associated with intestinal microbiota dysbiosis.Based on the gut-lung axis theory,probiotic intervention may be a potential strategy for respiratory diseases.Lacticaseibacillus paracasei K56 was reported to regulate gut microbiota in mice.However,its effect on allergic asthma has not been reported.In this study,we investigated the effect of the K56 on ovalbumininduced asthma and its possible mechanisms.Our results showed that K56 reduced asthma symptoms and inflammatory cell infiltration in the lung of asthmatic mice.And K56 regulated the differentiation of helper T cells in the lung and intestine.Results from 16S r RNA gene sequencing showed that K56 prophylaxis significantly elevated the richness of Akkermansia and Burkholderia.Meanwhile,K56 abrogated the decrease in the levels of short-chain fatty acids(SCFAs)in the feces.In addition,a rebound in the m RNA expression of the SCFA receptors was observed after K56 prophylaxis.Notably,the regulatory T cell(Treg)frequencies and the FFAR3 levels were positively correlated.These results suggest that K56 could attenuate asthma,possibly by modulating the intestinal microbiota and regulating Treg differentiation through SCFA metabolized.Our study showed that K56 may be used as a probiotic to prevent pulmonary inflammation and dysbiosis of the intestinal microbiota in allergic asthma.展开更多
目的探讨过敏性鼻炎患者血清辅助性T细胞17(Th17)/调节性T细胞(Treg)值与血清甲壳质酶蛋白-40(YKL-40)水平及维生素D水平的相关性。方法选择过敏性鼻炎患者99例(观察组)及同期体检健康者99例(对照组),采集空腹外周静脉血9 m L,采用酶联...目的探讨过敏性鼻炎患者血清辅助性T细胞17(Th17)/调节性T细胞(Treg)值与血清甲壳质酶蛋白-40(YKL-40)水平及维生素D水平的相关性。方法选择过敏性鼻炎患者99例(观察组)及同期体检健康者99例(对照组),采集空腹外周静脉血9 m L,采用酶联免疫吸附试验检测外周血25(OH)D_(3),采用流式细胞术检测外周血CD4^(+)IL-17+Th17细胞、CD4^(+)CD25^(+)Foxp3^(+)Treg细胞占CD4^(+)T细胞的百分比,采用双抗体夹心酶联免疫吸附法测定血清YKL-40,比较两组CD4^(+)IL-17+Th17细胞、CD4^(+)CD25^(+)Foxp3^(+)Treg细胞占CD4^(+)T细胞的百分比、YKL-40及维生素D水平。结果观察组血清25(OH)D_(3)水平和CD4^(+)CD25^(+)Foxp3^(+)Treg细胞占CD4^(+)T细胞的百分比低于对照组(P均<0.05),CD4^(+)IL-17+Th17细胞占CD4^(+)T细胞的百分比、Th17/Treg值及血清YKL-40水平高于对照组(P均<0.05)。观察组血清Th17/Treg值与YKL-40水平呈正相关(r=0.429,P<0.05),与血清25(OH)D_(3)水平呈负相关(r=-0.735,P<0.05);血清YKL-40与25(OH)D_(3)水平呈负相关(r=-0.450,P<0.05)。结论过敏性鼻炎患者血清25(OH)D_(3)水平降低,YKL-40水平升高,二者异常表达可能与Th17/Treg值失调有关,共同参与过敏性鼻炎的发生发展。展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2019YFC1605000)National Natural Science Foundation of China(Grant No.31871806)the Beijing Livestock Industry Innovation Team(BAIC05-2023)。
文摘Milk fat globule membrane(MFGM),which contains abundant glycoproteins and phospholipids,exerts beneficial effects on intestinal health and immunomodulation.The aim of this study was to evaluate the protective effects and possible underlying mechanisms of MFGM on cow’s milk allergy(CMA)in aβ-lactoglobulin(BLG)-induced allergic mice model.MFGM was supplemented to allergic mice induced by BLG at a dose of 400 mg/kg body weight.Results demonstrated that MFGM alleviated food allergy symptoms,decreased serum levels of lipopolysaccharide,pro-inflammatory cytokines,immunoglobulin(Ig)E,Ig G1,and Th2 cytokines including interleukin(IL)-4,while increased serum levels of Th1 cytokines including interferon-γand regulatory T cells(Tregs)cytokines including IL-10 and transforming growth factor-β.MFGM modulated gut microbiota and enhanced intestinal barrier of BLG-allergic mice,as evidenced by decreased relative abundance of Desulfobacterota,Rikenellaceae,Lachnospiraceae,and Desulfovibrionaceae,while increased relative abundance of Bacteroidetes,Lactobacillaceae and Muribaculaceae,and enhanced expressions of tight junction proteins including Occludin,Claudin-1 and zonula occludens-1.Furthermore,MFGM increased fecal short-chain fatty acids(SCFAs)levels,which elevated G protein-coupled receptor(GPR)43 and GPR109A expressions.The increased expressions of GPR43 and GPR109A induced CD103+dendritic cells accumulation and promoted Tregs differentiation in mesenteric lymph node to a certain extent.In summary,MFGM alleviated CMA in a BLG-induced allergic mice model through enhancing intestinal barrier and promoting Tregs differentiation,which may be correlated with SCFAs-mediated activation of GPRs.These findings suggest that MFGM may be useful as a promising functional ingredient against CMA.
文摘As the body’s integumentary system,the skin is vulnerable to injuries.The subsequent wound healing processes aim to restore dermal and epidermal integrity and functionality.To this end,multiple tissue-resident cells and recruited immune cells cooperate to efficiently repair the injured tissue.Such temporally-and spatially-coordinated interplay necessitates tight regulation to prevent collateral damage such as overshooting immune responses and excessive inflammation.In this context,regulatory T cells(Tregs)hold a key role in balancing immune homeostasis and mediating cutaneous wound healing.A comprehensive understanding of Tregs’multifaceted field of activity may help decipher wound pathologies and,ultimately,establish new treatment modalities.Herein,we review the role of Tregs in orchestrating the regeneration of skin adnexa and catalyzing healthy wound repair.Further,we discuss how Tregs operate during fibrosis,keloidosis,and scarring.
基金supported by the National Natural Science Foundation of China(81170296)
文摘BACKGROUND: Although regulatory T cells(Tregs) are key to the maintenance of immunologic homeostasis and tolerance, little is known about Treg-mediated immunosuppression in the stage of sepsis. This article aimed to review the current literature on the role of Tregs in the pathophysiology of septic response, attempting to investigate the role of Tregs in immune dysfunction during sepsis.DATA SOURCES: A literature search was conducted in January 2014 using the China National Knowledge Infrastructure and Pub Med. Articles on the role of Tregs in immune dysfunction during sepsis were identified.RESULTS: The identified articles indicated that Treg levels can be used for the assessment of the course of sepsis. The inhibition of Treg activity can promote the recovery of immune function.CONCLUSION: Since the mechanism of Tregs is complex during the sepsis, more studies are needed.
文摘Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistochemistry and real-time reverse trancription polymerase chain reaction (real-time RT-PCR) techniques to determine Foxp3+ Treg counts and the expression levels of Foxp3 mRNA and TSLP mRNA in thymomas of 23 MG patients and thymuses of 4 healthy controls. Results: The CD4+ Foxp3+ nTreg (natural regulatory T cells) counts in thymomas were significantly lower than those in normal thymuses (P<0.01), and the expression levels of Foxp3 mRNA and TSLP mRNA were also lower in thymomas(P<0.01). Among the thymoma types, type B1 thymoma had the highest Foxp3+ nTreg count and standard values of Foxp3 mRNA and TSLP mRNA. There was a strong positive correlation between the mRNA transcriptional levels of Foxp3 and TSLP. Conclusion: The insufficient expression of Foxp3 in thymoma, which may be caused by decreased transcription of TSLP, may result in the reduction of Tregs and cause autoimmune disorders.
基金supported by the National Natural Science Foundation of China(81973022 and 81730090)。
文摘Anthocyanin,as a typical food bioactive molecule,is capable of reversing inflammatory,oxidative and allergic condition thus contributes to intestinal health.We were wondering whether anthocyanin has influence on the infiltration of inflammatory cells into the intestinal mucosa and thus help enhancing intestinal barrier which could be damaged in some metabolic diseases.In this study,the influence of anthocyanin(administered orally)on the alterations(including structure and permeability)of the intestinal mucosa in mice in response to a high fat-high cholesterol(HFHC)diet was investigated.Primary T helper 17(Th17)cells were isolated from mouse intestine tissues to observe the modulatory role of anthocyanin through the transcription phosphorylated STAT 3(p-STAT3).The results indicated that anthocyanin significantly alleviated HFHC-induced impairment in the intestinal structures and permeability in a dose-dependent manner;moreover,anthocyanin appeared to inhibit HFHC induced the expression of p-STAT3,thereby disturbing Th17 cell differentiation.In high-fat diet(HFD,cholesterol level non-modified)-challenged mice selective p-STAT3 inhibitor significantly reversed the effects of anthocyanin,which were decreased amount of interleukin(IL)-17A(produced and released from Th17 cells)and the protected intestinal structure/function.In summary,the results of this study suggest that anthocyanin may attenuate the damage of intestinal barrier in HFHC mice through regulating intestinal STAT3-Th17-IL-17A signal transduction pathway.
文摘The intestinal immune system maintains tolerance to harmless food proteins and gut microbiota through peripherally derived RORγt+Tregs(pTregs),which prevent food intolerance and inflammatory bowel disease.Recent studies suggested that RORγt+antigen-presenting cells(APCs),which encompass rare dendritic cell(DC)subsets and type 3 innate lymphoid cells(ILC3s),are key to pTreg induction.Here,we developed a mouse with reduced RORγt+APCs by deleting a specific cis-regulatory element of Rorc encoding RORγt.Single-cell RNA sequencing and flow cytometry analyses confirmed the depletion of a RORγt+DC subset and ILC3s.These mice showed a secondary reduction in pTregs,impaired tolerance to oral antigens,and an increase in T helper(Th)2 cells.Conversely,ILC3-deficient mice showed no pTregs or Th2 cell abnormalities.Lineage tracing revealed that RORγt+DCs share a lymphoid origin with ILC3s,consistent with their similar phenotypic traits.These findings highlight the role of lymphoid RORγt+DCs in maintaining intestinal immune balance and preventing conditions like food allergies.
文摘目的探讨儿童过敏性鼻炎(allergic rhinitis,AR)和支气管哮喘(bronchial asthma,BA)患儿外周血高迁移率族蛋白B1(high mobility group box 1,HMGB1)水平与辅助性T细胞17(T helper 17 cell,Th17)和调节性T细胞(regulatory T cell,Treg)的比例(Th17/Treg)的相关性。方法采用前瞻性研究方法,选取2023年3月至12月在解放军总医院第七医学中心门急诊就诊患儿及健康体检者共113例作为研究对象,按照临床症状分成健康对照组(n=25)、过敏性鼻炎组(AR组,n=28)、支气管哮喘组(BA组,n=31)和两者并有组(AR+BA组,n=29),比较4组肺功能、免疫球蛋白E(immunoglobulin E,IgE)、白细胞介素(interleukin,IL)-17、HMGB1水平和Th17/Treg比例。统计学方法采用t检验、方差分析和Pearson相关性分析。结果各组的第1秒用力呼气容积(forced expiratory volume in the first second,FEV1)的结果显示,健康对照组高于AR组、BA组和AR+BA组[(96.4±2.5)%、(90.7±4.9)%、(88.6±4.1)%、(82.1±5.5)%,F=47.193,P值均<0.001],显示AR和BA患儿肺功能可能变差。AR组、BA组和AR+BA组HMGB1水平高于健康对照组[(30.4±12.4)mg/L、(47.2±17.8)mg/L、(51.4±21.8)mg/L、(4.3±2.1)mg/L,F=48.896,P值均<0.001]。AR组、BA组和AR+BA组Th17/Treg比例高于健康对照组(0.68±0.14、0.71±0.14、1.36±0.40、0.30±0.07,F=105.547,P值均<0.001)。Pearson相关性分析结果显示,HMGB1与Th17(r=0.521,P<0.001)、Th17/Treg(r=0.419,P<0.05)、IgE(r=0.502,P<0.05)、IL-17(r=0.472,P<0.05)呈正相关,与FEV1(r=-0.645,P<0.001)呈负相关。结论在儿童AR合并BA的发病过程中,HMGB1水平及Th17细胞百分比增加,而Treg细胞百分比降低,Th17/Treg比例存在失衡的情形,HMGB1水平与Th17细胞百分比、Th17/Treg比例、IgE、IL-17及FEV1存在一定的相关性,HMGB1和Th17/Treg的动态平衡可能通过影响细胞因子的表达而起到一定的调节作用。
基金supported by grants from the National Natural Science Foundation of China(82174113,81473656)National Center of Technology Innovation for Dairy(No.2023-JSGG-15)。
文摘Many studies have shown that the development of allergic asthma is associated with intestinal microbiota dysbiosis.Based on the gut-lung axis theory,probiotic intervention may be a potential strategy for respiratory diseases.Lacticaseibacillus paracasei K56 was reported to regulate gut microbiota in mice.However,its effect on allergic asthma has not been reported.In this study,we investigated the effect of the K56 on ovalbumininduced asthma and its possible mechanisms.Our results showed that K56 reduced asthma symptoms and inflammatory cell infiltration in the lung of asthmatic mice.And K56 regulated the differentiation of helper T cells in the lung and intestine.Results from 16S r RNA gene sequencing showed that K56 prophylaxis significantly elevated the richness of Akkermansia and Burkholderia.Meanwhile,K56 abrogated the decrease in the levels of short-chain fatty acids(SCFAs)in the feces.In addition,a rebound in the m RNA expression of the SCFA receptors was observed after K56 prophylaxis.Notably,the regulatory T cell(Treg)frequencies and the FFAR3 levels were positively correlated.These results suggest that K56 could attenuate asthma,possibly by modulating the intestinal microbiota and regulating Treg differentiation through SCFA metabolized.Our study showed that K56 may be used as a probiotic to prevent pulmonary inflammation and dysbiosis of the intestinal microbiota in allergic asthma.
文摘目的探讨过敏性鼻炎患者血清辅助性T细胞17(Th17)/调节性T细胞(Treg)值与血清甲壳质酶蛋白-40(YKL-40)水平及维生素D水平的相关性。方法选择过敏性鼻炎患者99例(观察组)及同期体检健康者99例(对照组),采集空腹外周静脉血9 m L,采用酶联免疫吸附试验检测外周血25(OH)D_(3),采用流式细胞术检测外周血CD4^(+)IL-17+Th17细胞、CD4^(+)CD25^(+)Foxp3^(+)Treg细胞占CD4^(+)T细胞的百分比,采用双抗体夹心酶联免疫吸附法测定血清YKL-40,比较两组CD4^(+)IL-17+Th17细胞、CD4^(+)CD25^(+)Foxp3^(+)Treg细胞占CD4^(+)T细胞的百分比、YKL-40及维生素D水平。结果观察组血清25(OH)D_(3)水平和CD4^(+)CD25^(+)Foxp3^(+)Treg细胞占CD4^(+)T细胞的百分比低于对照组(P均<0.05),CD4^(+)IL-17+Th17细胞占CD4^(+)T细胞的百分比、Th17/Treg值及血清YKL-40水平高于对照组(P均<0.05)。观察组血清Th17/Treg值与YKL-40水平呈正相关(r=0.429,P<0.05),与血清25(OH)D_(3)水平呈负相关(r=-0.735,P<0.05);血清YKL-40与25(OH)D_(3)水平呈负相关(r=-0.450,P<0.05)。结论过敏性鼻炎患者血清25(OH)D_(3)水平降低,YKL-40水平升高,二者异常表达可能与Th17/Treg值失调有关,共同参与过敏性鼻炎的发生发展。
