淋巴细胞亚群及T淋巴细胞亚群在过敏性哮喘及肺炎中的意义

目的 研究过敏性哮喘、肺炎患儿外周血淋巴细胞亚群及T淋巴细胞亚群改变情况,了解两种疾病患儿的免疫状况,为临床诊治提供参考.方法 收集过敏性哮喘及肺炎患儿各15例,同期选择15例健康儿童为对照,应用多色免疫荧光标记方法,检测患儿的淋巴细胞亚群,包括T细胞(CD3+)、T辅助/诱导细胞(CD4+)、T抑制/毒性细胞(CD8+)、自然杀伤细胞( CD16+ 56+)及B细胞(CD19+);应用细胞内免疫荧光标记方法,检测CD4+ IFN -y +Th1(简称Th1)、CD4+ IL -4+Th2(简称Th2)、CD4+IL- 17 +Th17(简称Th17).结果 过敏性哮喘患儿Th2、Th17与对照组比较均升高,CD3+、CD4+、CD8+、CD16+ 56+百分率明显则低于对照组及肺炎组,而CD19+及CD4+/CD8+均较对照组偏高(P＜0.05).肺炎组与对照组比较,仅CD4+有明显降低.结论 过敏性哮喘与肺炎患儿存在着不同的免疫学改变,过敏性哮喘改变较肺炎更明显;检测淋巴细胞亚群及Th1、Th2和Th17,对小儿过敏性哮喘与肺炎的诊断及治疗均有参考意义.     

Acute exercise and immune function. Relationship between lymphocyte activity and changes in subset counts.

Twenty-one young male subjects exercised on a cycle ergometer for 60 min at 60% of VO2max. Blood samples collected every 30 min throughout exercise and continuing to 120 min recovery served for the immunological tests. Exercise induced biphasic changes in the various leucocyte subsets. There was a granulocytosis, lymphocytosis and monocytosis during exercise, and a further granulocytosis and a slight monocytosis, but a lymphocytopenia during recovery. All lymphocyte subsets (CD3+, CD19+, CD4+, CD8+, and CD16+ cells) increased in number during exercise, were decreased 30 min after exercise, and had not returned to baseline levels by 120 min of recovery. The apparent lymphocyte responsiveness to the mitogens phytohaemagglutinin (PHA) and pokeweed mitogen (PWM) declined significantly during exercise, returning to normal by 120 min of recovery. The natural killer (NK) activity rose markedly during exercise, but decreased to almost half the pre-exercise level at 30 and 60 min of recovery, returning to baseline levels after 120 min of recovery. Functional capability correlated well with the percentage of each major responder subset in the assay, suggesting that the in vitro lymphocyte PHA- and PWM-responsiveness and the NK activity did not change significantly on a per cell basis. The analysis of lymphocyte marker antigen density revealed that the CD3+, CD4+, CD8+ and CD19+ lymphocytes mobilized into the circulation during exercise did not express the respective CD3, CD4, CD8 and CD19 molecules as strongly as did the subsets circulating at rest, whereas the expression of the CD16 antigen on CD16+ lymphocytes remained unchanged.     

长远航持续应激对潜艇艇员免疫功能及细胞因子表达的影响

目的:研究某型潜艇艇员长远航前后淋巴细胞亚群、调节T淋巴细胞及相关细胞因子的变化,探讨长远航中持续应激对艇员免疫功能的影响。方法:随机抽取长远航(70 d)潜艇61名艇员为研究对象,空腹抽取静脉血,利用流式细胞仪对艇员长远航前后淋巴细胞亚群[CD3 +、CD4 +、CD8 +、CD4 +/CD8 +、CD3 -CD19 +、CD3 -CD(16+56) +]及调节T淋巴细胞(CD4 +CD25 +)进行测定,采用液态芯片技术观察白细胞介素-2(IL-2)、IL-4、IL-8、干扰素诱导蛋白-10(IP-10)含量的变化。 结果:与长远航前相比,长远航后CD3 +、CD4 +、CD8 +、CD3 -CD19 +、CD3 -CD(16+56) +淋巴细胞水平显著降低,差异均有统计学意义( P<0.05);CD4 +/CD8 +的比值以及CD4 +CD25 +水平显著升高,差异均有统计学意义( P<0.01);IL-2、IL-8含量降低,差异均有统计学意义( P<0.05);IL-4、IP-10含量升高,差异均有统计学意义( P<0.05)。 结论:在长远航持续应激作用下,艇员的免疫功能发生明显变化,表明长远航对艇员健康有一定的影响,有必要进一步阐明原因并采取必要的预防措施。     

Acute exercise and T-lymphocyte expression of the early activation marker CD69

PURPOSE: This study aimed to determine the effect of acute exercise on the proliferation and expression of activation markers on T-lymphocytes. METHODS: Seventeen well-trained male endurance runners completed 60 min of treadmill running at 95% of ventilatory threshold and a resting, no exercise, control session at the same time of day. Five blood samples were collected at each session: before exercise, mid-exercise, immediately after exercise, and 30 min and 60 min after exercise. Isolated peripheral blood mononuclear cells (PBMC) were stimulated with the mitogen PHA. Activation was measured using the expression of CD69 (assessed by three-color flow-cytometry), and cellular proliferation was assessed using 3-(4,5-dimethlthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) dye uptake. RESULTS: At all sampling points, there was a significant difference (P < 0.05) in the percentage of CD4 and CD8 cells that became activated (CD69+) after mitogen stimulation (68% of CD4 compared with 45% of CD8 cells). Exercise had no effect on the percentage of cells that became activated in response to mitogen. There was a significant exercise-induced decrease in lymphocyte proliferation of PBMC, but when expressed per-T-cell (CD3+), there was no difference between the exercise and control condition. CONCLUSION: This study indicated that on an individual cell basis 1 h of exercise at 95% of ventilatory threshold did not alter the ability of T-lymphocytes (CD3+) or T-lymphocyte subsets (CD3+CD4+ and CD3+CD8+) to become activated and did not alter the ability of T-lymphocytes to proliferate.     

Effects of unaccustomed and accustomed exercise on the immune response in runners

PURPOSE: To test the hypothesis that long-term immunological response may be different after accustomed concentric and unaccustomed eccentric exercise in endurance-trained men. METHODS: Fourteen highly endurance-trained male runners performed two bouts of high-intensity exercise with at least 2-wk intervals between bouts. Concentric exercise consisted of a 60-min level run with a targeted heart rate of 80% VO2 peak. Eccentric exercise was conducted lying on a specially designed exercise rack, eliciting eccentric action of the musculus quadriceps femoris. Blood samples were taken before and 1, 6, 24, 72, and 144 h after exercise to determine creatine kinase (CK), C-reactive protein (CRP), and interleukin-6 (IL-6). Lymphocyte subset distribution was assessed using flow cytometry. RESULTS: We found a significant (P < 0.05) increase of CD4 (eccentric: 17%; concentric: 20%), CD3+/CD4+ (16 vs 19%), CD25+ (45 vs 29%), CD25+/CD4+ (27 vs 50%), HLA-DR+ (20 vs 15%), HLA-DR+/CD4+ (16 vs 67%), and CD19+/CD45+ (52 vs 103%) positive lymphocytes 1 h after both exercise bouts. However, eccentric exercise resulted in a significantly higher and longer (6 h) increase of CD25+/CD4+ and HLA-DR+/CD8+ lymphocytes and a peak increase of CK at 72 h. IL-6 and CRP increased only after concentric exercise within the first 24 h. Both exercises resulted in a decrease of monocyte activation (LFA-1: CD18+/CD11a+) after 6 h, with an increase for the eccentric exercise part after 24 h (P < 0.05). CONCLUSION: Accustomed concentric exercise mainly induced an acute-phase response, with increased CRP, IL-6, and activation of CD4 lymphocyte subsets. Unaccustomed eccentric exercise provided a delayed increase in CK and activation of monocytes and CD4+ and CD8+ subsets. Therefore, the immunological reaction depends not only on the type of contraction but also on the adaptation to the exercise.     

辐射损伤后小鼠T细胞功能亚群及其IL-4和IFN-γ的变化

目的 观察不同剂量辐射损伤后小鼠T细胞功能亚群、细胞因子IL-4和IFN-γ的变化。方法 C57BL/6j小鼠分为假照射组和辐射损伤模型组。采用⁶⁰Coγ线照射诱导辐射损伤模型。吸收剂量分别为0.7、1.4、2.8及5.6 Gy。应用细胞表面标志和细胞内因子标记结合流式细胞仪分析急性照射损伤和损伤恢复期小鼠脾CD3+、CD4+、CD8+T细胞功能亚群,以及细胞因子IL-4和IFN-γ的变化。结果 1 辐射损伤后CD3+、 CD4+及 CD8+有明显的减低,其改变幅度与受照剂量有关。2 照射后1 d, IFN-γ降低幅度明显高于IL-4,受照剂量大于2.8 Gy组,IL-4/IFN-γ比值较空白对照组明显升高。3 辐射对淋巴细胞功能亚群、细胞因子IL-4和IFN-γ的损伤在照射后25 d有不同程度的恢复,但与假照射组比较仍有明显差别。 结论 电离辐射可使淋巴细胞亚群CD3+,CD4+,CD8+、 CD4+/CD8+、细胞因子IL-4和IFN-γ发生改变,并诱发受照小鼠免疫功能低下,特别是使细胞因子IL-4和IFN-γ发生失衡,再次证实辐射损伤后小鼠脾Th1/Th2模式向Th2免疫反应漂移的现象。     

Exercise during late-follicular menstrual phase: influence on immune parameters

AIM: The purpose of this study was to examine whether training status and plasma hormones (estradiol--E2, progesterone--P, luteinizing hormone--LH, and follicle-stimulating hormone--FSH) have an effect on selected immune indexes during or following an acute bout of exercise. METHODS: Seven female triathletes (TRI) and 7 recreationally active (REC) females were randomly assigned to rest (RE) and exercise (EX) trials during the late-follicular menstrual phase (LF). The EX was 1 hour of cycling at 63.1+/-6% VO2peak (TRI) and 61+/-5.1% VO2peak (REC) and RE was 1 hour of sitting. Blood was drawn for both trials at baseline (0H), 1 hour (1H), and at 3 hours (3H). RESULTS: Positive correlations were found between E2 and CD19+ cells for both groups as well as P and CD8+ cells for the REC group. E2 increased during EX and returned to baseline at 3HEX for both groups, however, LH remained elevated at 3HEX for REC. There were significant exercise time effects for CD3+, CD4+, CD8+, and CD3- CD16+ CD56+ cells. The NCMC and 1:1 were elevated at 1HEX for both groups and returned to baseline by 3HEX. During RE, CD3- CD16+ CD56+ cell numbers for both groups and NCMC for REC remained elevated at 3HRE. CONCLUSIONS: E2 and P correlated with CD19+ and CD8+ cells, respectively. Although there were transient exercise-induced changes in immune indexes and E2 and LH, with LH remaining elevated at 3HEX for REC, both training groups elicited similar responses for plasma hormones, lymphocyte subpopulations, and NCMC.     

缓解期B系淋巴瘤患者外周血T细胞亚群检测

目的评估处于临床缓解期B系淋巴瘤患者的细胞免疫状态。方法应用流式细胞分析技术检测我院2010年11月至2014年7月处于临床缓解期的34例B系淋巴瘤患者外周血T细胞亚群。结果缓解期B系淋巴瘤患者外周血CD3~+、CD3~+CD4~+T淋巴细胞亚群及CD4~+/CD8~+均低于健康对照组(P<0.05);惰性B系淋巴瘤患者外周血CD3~+、CD3~+CD4~+、CD3~+CD56~+T淋巴细胞亚群及CD4~+/CD8~+均较侵袭性B系淋巴瘤患者高(P<0.05)。结论缓解期B系淋巴瘤患者仍存在细胞免疫功能低下,且侵袭性较惰性淋巴瘤免疫功能紊乱更严重。     

An exploratory study into the effect of exhausting bicycle exercise on endocrine and immune responses in post-menopausal women: relationships between vigour and plasma cortisol concentrations and lymphocyte proliferation following exercise.

It is well-established that bicycle exercise alters the endocrine and immune responses in men, but little information is available for women, especially middle-aged, post-menopausal women. The purpose of our study was to document the endocrine and immune reactivity to exhausting bicycle exercise in post-menopausal women, and to explore whether complaints of fatigue or low vigour are related to these exercise-induced responses. Thirteen healthy post-menopausal women participated in this study. We used a graded exercise protocol to study the kinetics of activation of the endocrine and immune system. We chose to examine hormones related to the hypothalamus-pituitary-adrenal (HPA) system such as adrenocorticotropin hormone (ACTH) and cortisol and hormones related to the pituitary such as prolactin (PRL) and growth hormone (GH). With regard to the immune system, we examined the natural killer (NK) cell activity and pokeweed (PWM)-induced lymphocyte proliferation in addition to changes in peripheral blood cell counts. Our results demonstrate that acute physical stress results in a strong release of ACTH, cortisol, GH and PRL. The bicycle test significantly increased the number of CD3+, CD4+, CD16/56+ (NK cells) and CD8+ cells in our group of post-menopausal women. Interestingly, NK activity did not increase significantly despite an increase in NK cell numbers. PWM-induced lymphocyte proliferation did not change either. In addition, our data support the hypothesis that low vigour in post-menopausal women interferes with the endocrine and immune responses to exhausting exercise. In women with complaints of low vigour we found lower cortisol responses and higher increments in the proliferative capacity of lymphocytes as compared to those with high vigour scores. NK activity was unrelated to exhaustive mood states. These data indicate that endocrine as well as immune system activity changes in response to exhausting exercise in middle-aged, post-menopausal women. In addition, exhaustive mood states may contribute to cortisol responses and function of peripheral immune cells in post-menopausal women following exhausting exercise.     

慢性乙肝患者外周血淋巴细胞与IDO相关性研究

目的观察慢性乙型肝炎(CHB)患者外周血淋巴细胞亚群的变化及其与吲哚胺2,3-二氧化酶(IDO)的相关性,探索CHB免疫低下的机制。方法采用随机对照方法,采集50例CHB患者及健康对照组外周静脉血3ml,分别用流式细胞仪检查其CD4+和CD8+T细胞,用荧光实时PCR检测IDO mRNA,比较两组淋巴细胞、IDO的差异及其相关性分析。结果 CHB患者外周血CD4+和CD8+T细胞均较对照组减少,尤以CD4+T细胞为甚;IDO mRNA较对照组明显增多,其与CD4+T细胞及CD4+/CD8+均呈负相关(r=-0.622和0.426,P<0.05)。结论 CHB患者细胞免疫功能低下,IDO的过度表达可能是其主要机制之一。     

分割照射对肝癌移植瘤小鼠脾脏免疫细胞的影响

目的探讨肝癌皮下移植瘤小鼠的分割照射对远端脾脏组织的影响。方法构建荷瘤C57BL/6 J小鼠模型,取对数期生长的小鼠肝癌细胞Hepa 1-6接种于小鼠右侧皮下(1×10^7/只),荷瘤小鼠按随机数表法分为荷瘤对照组和照射组,每组20只。另设10只健康小鼠作为健康对照组。照射组皮下肿瘤给予8 Gy×3次X射线局部照射,剂量率为0.883 Gy/min。照射后第7、14天检测小鼠肿瘤脏器指数、脾脏脏器指数、脾脏病理学改变,以及脾脏T淋巴细胞亚群、B淋巴细胞亚群、NK细胞的变化。结果与荷瘤对照组相比,照后7、14 d,照射组小鼠肿瘤脏器指数显著降低(t=4.649、26.34,P<0.05),脾脏中NK细胞显著升高(t=3.952、3.633,P<0.05),CD3+、CD4+、CD3+CD4+淋巴细胞以及CD4+/CD8+比值在照后7 d显著降低(t=3.193、3.656、3.219、2.641,P<0.05),CD3+淋巴细胞在照后14 d显著降低(t=3.031,P<0.05),其余指标脾脏脏器指数、B淋巴细胞、CD3+CD4+淋巴细胞、CD8+淋巴细胞变化不显著。结论肿瘤局部照射可引起远隔器官内淋巴细胞比例失衡,导致机体免疫力下降,为放疗免疫损伤提供了新的诠释。     

Apoptosis does not contribute to the blood lymphocytopenia observed after intensive and downhill treadmill running in humans

The lymphocytopenia that occurs during the recovery stage of exercise may be a result of apoptosis through an increased expression of CD95, a loss of the complement regulatory proteins CD55 and CD59, or both. Trained subjects completed intensive, moderate, and downhill treadmill-running protocols. Blood lymphocytes isolated before, immediately after, 1h after, and 24h after each exercise test were assessed for markers of apoptosis (Annexin-V(+), HSP60(+)), and CD55, CD59, and CD95 expression by flow cytometry. Lymphocytopenia occurred 1h after intensive and downhill running exercise, but no changes in the percentage of Annexin-V + or HSP60 + lymphocytes were found. Numbers of CD95(+), CD55(dim), and CD59(dim) lymphocytes increased immediately after intensive and downhill exercise, which were attributed to the selective mobilization and subsequent efflux of CD8(+) and CD56(+) lymphocyte subsets. No differences were found between the intensive and downhill protocols. In conclusion, apoptosis of circulating lymphocytes does not appear to contribute to exercise-induced lymphocytopenia.     

Immunological changes in response to exercise: influence of age, puberty, and gender

PURPOSE: This study tested the hypothesis that exercise-induced perturbation and recovery of the immune system would vary with age, puberty, and gender in healthy children and adolescents. METHODS: Twelve-year-old girls (YG; N = 14) and boys (YB; N = 20), and 14-yr-old girls (OG; N = 11) and boys (OB; N = 13) cycled for 60 min at 70% VO2max. Blood was collected before, at 30 and 60 min of exercise, and at 30 and 60 min of recovery to measure total leukocytes, leukocyte and lymphocyte subsets, and cytokines. Age and pubertal (Tanner stage) effects within genders and gender effects within age and pubertal groups were determined. RESULTS: Exercise-induced increases in lymphocytes, CD3-CD16+CD56+ counts, and IL-6 were approximately 83, 90, and 390% greater in OG versus YG (P < 0.05). Recovery leukocytosis and neutrophilia were approximately 56 and 35% greater in OB versus YB (P < 0.05). Pubertal stage did not have a statistically significant influence on responses in girls, but the lowest pubertal stage consistently showed smaller changes in lymphocytes and CD3-CD16+CD56+ counts. Recovery neutrophilia was approximately 120% greater in postpubertal boys versus prepubertal or pubertal boys (P < 0.05). Responses of lymphocytes and CD3-CD16+CD56+ counts, respectively, were approximately 120 and 82% greater in OG versus OB (P < 0.05), with no differences between YG and YB. Exercise-induced increases in total leukocytes, lymphocytes, and CD3-CD16+CD56+ counts were at least 35% greater in girls versus boys of similar pubertal status (P < 0.05). Regardless of age, puberty, or gender, IL-8 levels were significantly higher during recovery versus rest (P < 0.05). CONCLUSION: These results highlight the need to control for age, puberty, and gender when interpreting immunologic responses to exercise in a pediatric population.     

Freewheel training alters mouse hippocampal cytokines

The effects of 16 weeks of voluntary wheel running in healthy female mice on hippocampal expression of pro-(TNF-α, IL-1β, IL-12) and anti-(IL-10, IL-1ra) inflammatory and pleiotropic (IL-6) cytokines and apoptotic status of specific cell subsets (CD45+, CD11b+) were studied. Mice were assigned to wheel running (WR; n=20) or a control condition (No WR; n=22) and sacrificed after the 16 weeks. Data collected included measures of training status (running volume, body weight, run-to-exhaustion time, and skeletal muscle cytochrome c oxidase activity), flow cytometric analysis of cell phenotypes and apoptosis (CD45+, CD11b+, Annexin+, Annexin+/PI+, PI+), and cytokine concentrations in cell lysates. WR mice had measurable training effects and significantly lower TNF-α (p<0.05) and higher IL-6 (p<0.05), IL-1ra (p<0.05) and IL-12 (p<0.05) expression in the hippocampus compared to controls. IL-1β, IL-10, and the percent of apoptotic and dead cells did not change due to training. Taken together, and in relation to the complex interactions between cytokines, the results suggest a possible mechanism whereby exercise training may buffer from dementia and cognitive decline through changes in the central cytokine milieu in the hippocampus.     

Postexercise immune correlates in children with and without cystic fibrosis

INTRODUCTION: Previous studies have shown that children with cystic fibrosis (CF) are capable of mounting a normal immune response after the stress of exercise. However, few data are available regarding the underlying mechanisms by which this immune modulation occurs. METHODS: In this study, lymphocyte and leukocyte cell counts were measured before and immediately after a single bout of exhaustive exercise in 25 children (ages 8-17 yr; 12 with CF and 13 healthy controls). Catecholamine, cortisol, and insulin levels, age, nutritional parameters, and static and dynamic lung function were measured as potential correlates for immune modulation. We hypothesized that catecholamine levels would be associated with the immune changes seen after exercise in children with CF. RESULTS: Our results demonstrated positive correlations between age and the change in cell counts after exercise for white blood cells (r = 0.44, P < 0.03), lymphocytes (r = 0.60, P < 0.002), monocytes (r = 0.43, P < 0.03), and CD3-CD16+CD56+ cells (r = 0.61, P < 0.002). Lower increases in the lymphocyte and CD3-CD16+CD56+ cells were observed in the CF group. Changes in pre- and post-exercise norepinephrine levels were weakly correlated with the changes in granulocyte, lymphocyte, and monocyte cell counts. Changes in cortisol levels correlated with lymphocyte and CD19+ cell count changes for the CF group but not for the healthy controls. Within the CF group, the severity of lung disease (as indicated by a FEV1) was negatively correlated with changes in lymphocyte (r = -0.66, P < 0.02) and CD3-CD16+CD56+ cell counts (r = -0.67, P < 0.02). CONCLUSION: The results suggest that postexercise changes in cell counts occur in an age dependent, norepinephrine associated manner. Disease severity for children with CF also appears to enhance the postexercise leukocytosis with pronounced increases seen in natural killer cells.     

Effects of exercise training on men seropositive for the human immunodeficiency virus-1.

We examined the effects of chronic exercise on fitness and immune status in Caucasian males (34.9 +/- 5.6 yr) diagnosed by Western blot as seropositive for the HIV-1 virus. The exercise regimen involved 12 wk of 1 h sessions 3 d.wk: 20 min of cycle exercise at 60-80% HRreserve was followed by 35 min of strength and flexibility training. After matching subjects on health status (modified Walter Reed criteria), subjects (N = 37) were randomly assigned to exercise or a counseling control condition. Changes in strength, responses to the YMCA cycle test, and serum lymphocytes were tested by MANOVA in a condition (exercise or counseling)-by-time (pretest, posttest) design with repeated measures on time. Results indicated significant (P less than 0.001) group-by-time interactions for strength (N.m) (chest press and leg extension) and for HR (beats.min-1) and total time (TT) on the cycle test at 150 W. Strength and TT increased and HR decreased in the exercise condition, while control subjects did not change. Total leukocyte, lymphocyte, CD4+, and CD8+ cell counts, and the CD4+/CD8+ ratio were statistically unchanged for each condition. We conclude that HIV-1+ men, including those symptomatic for AIDS-related complex, can experience significant increases in neuromuscular strength and cardiorespiratory fitness without changes in lymphocyte phenotypes or clinical diagnosis when the exercise regimen is prescribed and monitored in accordance with ACSM guidelines for healthy adults.     

Anaerobic exercise causes transient changes in leukocyte subsets and IL-2R expression.

There is evidence that the stress of intense athletic competition and training depresses cellular immunity and predisposes athletes to increased infection. This paper reports changes in circulating leukocyte subsets of trained (group I: VO2max = 67.2 +/- 5.4 ml.kg-1min-1; age = 22.0 +/- 6.2 yr) and untrained (group II: VO2max = 55.0 +/- 4.9 ml.kg-1min-1; age = 21.4 +/- 2.0 yr) males following 1 min of bicycle ergometry at maximum effort. Significant post-exercise increases in concentrations of total leukocytes, monocytes, lymphocytes, CD3+, CD4+, CD8+ lymphocytes were observed in both groups (all P < 0.01). The CD4/CD8 ratio decreased significantly (P < 0.01) but the granulocyte concentration was not altered (P > 0.05). Despite groups I and II not differing in either peak power or total work performed during the exercise test (P > 0.05), group II had a significantly greater concentration and percentage of CD8+ lymphocytes immediately after exercise (P < 0.01). All of the early changes were transient, with normalization occurring within 1 h. Only trained subjects showed a significant decrease in the percentage of CD25+ lymphocytes following PHA stimulation of whole blood obtained 6 h post-exercise. Alterations in leukocyte subpopulations found in response to predominantly anaerobic exercise appear to be associated with a significant, but possibly transient, alteration in the mitogenic responsiveness of lymphocytes that is restricted to aerobically trained subjects.     

SLE患者外周血淋巴细胞亚群变化的临床意义

目的探讨淋巴细胞亚群在系统性红斑狼疮(SLE)病人发病中的临床意义。方法采用流式细胞术检测了70例SLE患者(其中活动期38例,非活动期32例)以及30例健康体检者外周血CD3+/CD4+、CD3+/CD8+、CD3+/CD19+、NK(CD3+/CD16++CD56+)细胞的表达水平。结果与正常对照组相比,活动期SLE患者CD4+、NK细胞百分率明显降低(P<0.05),CD8+、B(CD19+)细胞百分率明显升高(P<0.05),CD4+/CD8+比值显著降低(P<0.01)。SLE患者活动期与非活动期比较,CD4+细胞数低于稳定期,CD8+细胞数明显高于稳定期。结论 SLE患者外周血淋巴细胞亚群细胞数的变化与疾病的病程和临床表现相关联。     

严重急性呼吸综合征肺脏及免疫器官淋巴细胞亚群分析

目的 探讨严重急性呼吸综合征(SARS)肺脏的免疫反应类型和状况，及免疫器官淋巴细胞亚群的数量变化。方法 采用免疫组织化学方法，以CD3、CD4、CD8、CD20、CD57、CD68、S-100、HLA-DR单克隆抗体，对1例重型SARS的肺组织及免疫器官中多种淋巴细胞亚群进行标记，并以健康人体脾脏及淋巴结作对照，观察分析各淋巴亚群的分布及数量变化。结果 该例重型SARS病例肺间质中主要以CD8^ 淋巴细胞浸润为主，杂以少数CD4^ 淋巴细胞。淋巴细胞亚群半定量分析显示，31枚胸腔淋巴结中，CD3^ 、CD4^ 、CD8^ 和CD20^ 细胞数减少的淋巴结百分率分别为74．2％、67．7％、74．2％、83．9％，其中各淋巴细胞亚群明显减少者比例较高，腹腔淋巴结中各淋巴细胞亚群减少较轻；脾脏中CD3^ 、CD4^ 、CD8^ 、CD20^ 细胞均呈不同程度的减少，其中以CD20^ 细胞数目减少最为显著；而淋巴结及脾脏中CD57^ 、CD68^ 、S-100^ 、HLA-DR^ 细胞数目呈相对增加改变。结论 结果提示SARS肺组织原位以细胞免疫反应为主，推测肺脏内细胞免疫反应可能具有清除受感染细胞内冠状病毒病原体和诱发肺组织免疫损伤的双重作用；疾病后期重型SARS病例免疫器官可能存在淋巴细胞亚群的不同程度减少及比例失衡，并呈围病变肺组织愈近，淋巴结内主要淋巴细胞亚群减少愈甚之趋势。     

Chronic low-dose gamma-radiation exposure and the alteration of the distribution of lymphocyte subpopulations in residents of radioactive buildings

Purpose : To elucidate the immunological change incurred in a human population by protracted gamma-radiation exposure at home environment. Materials and methods : An examination on the CD3+, CD4+, CD8+ and HLA-DR+ lymphocyte subsets was arranged for 196 exposed subjects with mean excess cumulative dose of 169mSv during 2-13 years of exposure. Another 55 close relatives of the exposed subjects were recruited as the non-exposed reference population. Results : The mean percentages of CD4+ T-lymphocytes, HLA-DR+ lymphocytes and the CD4+/CD8+ ratios in the exposed subjects (35.5, 19.9 and 1.51 respectively) were significantly lower than those of reference individuals (38.0, 22.6 and 1.72; p 0.02, 0.003, and 0.03 respectively), while the CD8 in total counts of the exposed was moderately increased above that of the reference populations (p=0.1). By ANOVA analysis, the percentages of CD4+ and HLA-DR+ subsets were significantly associated with radiation dose (p =0.0046, 0.003), while CD4+/CD8+ ratios were moderately associated with dose (p=0.073). HLA-DR+ counts were significantly and positively associated with duration of relocation from radioactive apartments (p=0.029). Conclusions : Significant immunological effects were observed in those who had received chronic low-dose radiation exposure.