Endogenous formaldehyde in aquatic products is a hot research topic, as it is an urgent problem to be solved. This paper summarized the advance in background concentration, generation mechanism and detection methods o...Endogenous formaldehyde in aquatic products is a hot research topic, as it is an urgent problem to be solved. This paper summarized the advance in background concentration, generation mechanism and detection methods of endogenous formaldehyde in aquatic products, and the work in the future was prospected.展开更多
The present report evaluates the effects of formaldehyde (FA) exposure on peripheral lymphocytes by using heth genetic and immunological parameters. Twenty-three non-smoking students in the study had inhalation exposu...The present report evaluates the effects of formaldehyde (FA) exposure on peripheral lymphocytes by using heth genetic and immunological parameters. Twenty-three non-smoking students in the study had inhalation exposure to 0.508 ±0. 299 mg/m3 of FA for a Period of 8 weeks (3h × 3 times each week) during anatomy classes. As for composition of lymphocyte subsets after FA exposare,significant increase was found in the percentage of CD19(B cells), while sighficant decrease was observed in CD3(total T cells), CD4(T helper-inducer cells), and CD8(T cytotoxic-suppressior cells) with a P<0 .01. Increase in the ratio of T-helper-inducer cells to T-cytotoxic-suppressor cells (T4 / T8) was also observed with statistical sighcance after exposure (P < 0.001). In the meanwhile,no significant difference (P > 0 .05) was reported between lymphocyte prolifendion rate and sisterchromatid exchange (SCE) at the exposure level and duration. It is suggested that the lymphocyte subsets may be most susceptible to the effects of FA, though a single immunological endpoint is rarely related with pathophysiological interpretation.展开更多
Formaldehyde(FA),as the simplest endogenous carbonyl molecule,participates in many biosynthesis and metabolism in living organisms,such as nucleotides and adenosine triphosphate(ATP).FA concentrations are sub-millimol...Formaldehyde(FA),as the simplest endogenous carbonyl molecule,participates in many biosynthesis and metabolism in living organisms,such as nucleotides and adenosine triphosphate(ATP).FA concentrations are sub-millimolar in the normal healthy body,but can rise significantly in a number of disease pathologies.As a result,detecting endogenous FA is critical for illness diagnosis and rehabilitation therapy monitoring.Recent studies have focused on the FA-responsive turn-on fluorescence probe,which has huge promise in the detection and visualization of FA in living cells and organisms,as well as exceptional use in disease diagnosis and therapeutic monitoring.This review summarizes the fluorescence luminescence mechanism and design concepts of FA fluorescent probes,as well as their recent applications in bioimaging and illness diagnostics.Additionally,this article indicates the present dilemma of FA-responsive fluorescent probe,including selectivity,specificity,and detection mode,which may provide references for the development of FA-responsive fluorescent probes.展开更多
目的探讨甲醛对性成熟期雄性大鼠生殖的影响及其作用机制。方法选用性成熟期健康SD雄性大鼠40只,随机分为甲醛染毒高(10 m g/kg.d)、中(1 m g/kg.d)、低(0.1 m g/kg.d)剂量和对照组4组。腹腔注射染毒14 d后观察睾丸重量和形态学改变,精...目的探讨甲醛对性成熟期雄性大鼠生殖的影响及其作用机制。方法选用性成熟期健康SD雄性大鼠40只,随机分为甲醛染毒高(10 m g/kg.d)、中(1 m g/kg.d)、低(0.1 m g/kg.d)剂量和对照组4组。腹腔注射染毒14 d后观察睾丸重量和形态学改变,精子数量和质量改变,血液中激素含量的改变;利用原位缺口末端标记法(TUNEL)检测睾丸细胞的凋亡;免疫组化方法检测睾丸F as基因的表达。结果①高剂量染毒组大鼠睾丸组织的质量明显低于对照组(P<0.05),中、高剂量染毒组睾丸曲细精管萎缩,生精上皮细胞层数减少,细胞排列紊乱;②中、高剂量染毒组大鼠精子的数量和精子活动度较对照组明显减少,精子畸形率明显增加(P<0.05);③染毒组与对照组相比,血清卵泡刺激素和黄体生成素含量轻度增高,而睾酮含量轻度下降,但差异没有统计学意义;④中、高剂量染毒组睾丸凋亡细胞较对照组明显增多(P<0.05),F as基因表达明显增加(P<0.05),且F as基因阳性表达与睾丸的凋亡指数呈正相关(r=0.8832,P<0.05)。结论甲醛对性成熟期雄性大鼠生殖系统有较明显的损伤,这种损伤可能与F as介导的睾丸生精细胞凋亡机制有关。展开更多
目的研究小鼠吸入气态甲醛后,甲醛对小鼠的脑、肾组织蛋白造成氧化损伤和脂质的过氧化及其发生机制。方法用不同剂量的气态甲醛对小鼠进行连续动态染毒处理72 h,用2,4-二硝基苯肼比色法测定小鼠脑、肾组织蛋白质的羰基含量,以判断蛋白...目的研究小鼠吸入气态甲醛后,甲醛对小鼠的脑、肾组织蛋白造成氧化损伤和脂质的过氧化及其发生机制。方法用不同剂量的气态甲醛对小鼠进行连续动态染毒处理72 h,用2,4-二硝基苯肼比色法测定小鼠脑、肾组织蛋白质的羰基含量,以判断蛋白质的氧化损伤程度;用M DA(丙二醛)试剂盒测定组织中M DA含量,来判断脂质的过氧化程度。结果只有吸入3.0 m g/m3的气态甲醛时,才会对脑、肾组织中的蛋白质造成明显的氧化损伤;而在0.5 m g/m3时,脑组织中脂质的过氧化比肾组织中显著。结论0.5 m g/m3的气态甲醛不造成蛋白质氧化损伤,而对脑组织中脂质的过氧化作用却很显著,可见0.5 m g/m3甲醛对生物体存在着直接的神经毒性;3.0 m g/m3的气态甲醛对脑、肾组织中的蛋白质和脂质会造成明显的氧化损伤,且肾组织比脑组织敏感。展开更多
文摘Endogenous formaldehyde in aquatic products is a hot research topic, as it is an urgent problem to be solved. This paper summarized the advance in background concentration, generation mechanism and detection methods of endogenous formaldehyde in aquatic products, and the work in the future was prospected.
文摘The present report evaluates the effects of formaldehyde (FA) exposure on peripheral lymphocytes by using heth genetic and immunological parameters. Twenty-three non-smoking students in the study had inhalation exposure to 0.508 ±0. 299 mg/m3 of FA for a Period of 8 weeks (3h × 3 times each week) during anatomy classes. As for composition of lymphocyte subsets after FA exposare,significant increase was found in the percentage of CD19(B cells), while sighficant decrease was observed in CD3(total T cells), CD4(T helper-inducer cells), and CD8(T cytotoxic-suppressior cells) with a P<0 .01. Increase in the ratio of T-helper-inducer cells to T-cytotoxic-suppressor cells (T4 / T8) was also observed with statistical sighcance after exposure (P < 0.001). In the meanwhile,no significant difference (P > 0 .05) was reported between lymphocyte prolifendion rate and sisterchromatid exchange (SCE) at the exposure level and duration. It is suggested that the lymphocyte subsets may be most susceptible to the effects of FA, though a single immunological endpoint is rarely related with pathophysiological interpretation.
基金supported by the National Natural Science Foundation of China(No.52173138)Natural Science Foundation of Hubei Province(No.2021CFB298)Natural Science Foundation of Shandong Province(No.ZR2021ME015).
文摘Formaldehyde(FA),as the simplest endogenous carbonyl molecule,participates in many biosynthesis and metabolism in living organisms,such as nucleotides and adenosine triphosphate(ATP).FA concentrations are sub-millimolar in the normal healthy body,but can rise significantly in a number of disease pathologies.As a result,detecting endogenous FA is critical for illness diagnosis and rehabilitation therapy monitoring.Recent studies have focused on the FA-responsive turn-on fluorescence probe,which has huge promise in the detection and visualization of FA in living cells and organisms,as well as exceptional use in disease diagnosis and therapeutic monitoring.This review summarizes the fluorescence luminescence mechanism and design concepts of FA fluorescent probes,as well as their recent applications in bioimaging and illness diagnostics.Additionally,this article indicates the present dilemma of FA-responsive fluorescent probe,including selectivity,specificity,and detection mode,which may provide references for the development of FA-responsive fluorescent probes.
文摘目的探讨甲醛对性成熟期雄性大鼠生殖的影响及其作用机制。方法选用性成熟期健康SD雄性大鼠40只,随机分为甲醛染毒高(10 m g/kg.d)、中(1 m g/kg.d)、低(0.1 m g/kg.d)剂量和对照组4组。腹腔注射染毒14 d后观察睾丸重量和形态学改变,精子数量和质量改变,血液中激素含量的改变;利用原位缺口末端标记法(TUNEL)检测睾丸细胞的凋亡;免疫组化方法检测睾丸F as基因的表达。结果①高剂量染毒组大鼠睾丸组织的质量明显低于对照组(P<0.05),中、高剂量染毒组睾丸曲细精管萎缩,生精上皮细胞层数减少,细胞排列紊乱;②中、高剂量染毒组大鼠精子的数量和精子活动度较对照组明显减少,精子畸形率明显增加(P<0.05);③染毒组与对照组相比,血清卵泡刺激素和黄体生成素含量轻度增高,而睾酮含量轻度下降,但差异没有统计学意义;④中、高剂量染毒组睾丸凋亡细胞较对照组明显增多(P<0.05),F as基因表达明显增加(P<0.05),且F as基因阳性表达与睾丸的凋亡指数呈正相关(r=0.8832,P<0.05)。结论甲醛对性成熟期雄性大鼠生殖系统有较明显的损伤,这种损伤可能与F as介导的睾丸生精细胞凋亡机制有关。
文摘目的研究小鼠吸入气态甲醛后,甲醛对小鼠的脑、肾组织蛋白造成氧化损伤和脂质的过氧化及其发生机制。方法用不同剂量的气态甲醛对小鼠进行连续动态染毒处理72 h,用2,4-二硝基苯肼比色法测定小鼠脑、肾组织蛋白质的羰基含量,以判断蛋白质的氧化损伤程度;用M DA(丙二醛)试剂盒测定组织中M DA含量,来判断脂质的过氧化程度。结果只有吸入3.0 m g/m3的气态甲醛时,才会对脑、肾组织中的蛋白质造成明显的氧化损伤;而在0.5 m g/m3时,脑组织中脂质的过氧化比肾组织中显著。结论0.5 m g/m3的气态甲醛不造成蛋白质氧化损伤,而对脑组织中脂质的过氧化作用却很显著,可见0.5 m g/m3甲醛对生物体存在着直接的神经毒性;3.0 m g/m3的气态甲醛对脑、肾组织中的蛋白质和脂质会造成明显的氧化损伤,且肾组织比脑组织敏感。
