Malignant transformation of nevus sebaceous to basal-cell carcinoma: Case series,literature review,and management algorithm

Nevus sebaceous (NS) is a common congenital hamartoma of the skin composed predominantly of sebaceous glands. Although most NS are benign skin tumors, malignant transformations have been reported. There is still controversy about the lifetime risk of malignant degeneration and precise surgical criteria. This study reports cases of malignant degeneration and suggests a surgical treatment algorithm. The medical records of patients with basal-cell carcinoma (BCC) arising from NS between January 2001 and January 2021 were retrospectively reviewed. Patient demographics including lesion location, and tumor size were investigated. The symptoms, histological findings before and after excision, complications, and recurrence during 2-year follow-up periods were investigated. Ten patients were identified with BCC arising from NS lesions. All patients were female and the mean age was 52.11 years. All patients complained of sudden morphological changes, the most common type being rapid color changes. Two cases had histological findings that showed a miss-match between punch biopsy and excisional biopsy results. No recurrence was detected 2 years after surgeries in any patients. Cases after third stage, especially in over 40 years who report morphologic changes, should undergo total surgical excision as the first approach, with strong suspicion of malignant degeneration.     

慢性乙型肝炎组织中肝前体细胞的免疫组化特征

目的研究肝前体细胞（hepatic progenitor cells,HPCs）、小管样反应、中间型肝细胞在慢性乙型肝炎组织中的分布特征和数量变化,以及与肝细胞再生之间的可能联系。方法对42例慢性乙型肝炎组织行常规病理HE染色,按炎症活动度（G）分为轻、中、重三度,免疫组织化学方法观察肝胆细胞标记（AFP、GST-π、CK7、CK19）和造血干细胞标记（c-kit、CD34）的表达,并以Ki-67标记增殖的肝细胞,用CK7／CK19作为标记物对符合定义的HPCs、中间型肝细胞进行计数,小管样反应程度的判定利用彩色病理图象分析系统。结果慢性乙型肝炎的早期阶段即存在HPCs的活化和小管样反应,其数量随着炎症活动度的增加而增加,均表达CK7、CK19、GST-π和AFP,肝细胞增殖指数在轻、中度肝炎中逐渐增加,重度肝炎、肝硬化患者增殖的肝细胞数下降,而中间型肝细胞数量显著增加。小管样反应面积百分比与HPCs数目正相关（r=0．739,P〈0．05）,中间型肝细胞数目与HPCs数目正相关（r=0．614,P〈0．05）。结论慢性乙型肝炎中不仅有成熟肝细胞增殖,也存在肝前体细胞活化和分化,可能参与肝脏损伤后的再生修复。     

Grape seed powder increases gastrointestinal motility

Grape seed is an important natural bioactive product with various health benefits. Interstitial cells of Cajal (ICCs) are pacemaker cells in the gastrointestinal (GI) tract. The present study investigated the effects of grape seed powder (GSP) on ICC properties and GI motility. GSP depolarized the pacemaker potentials of ICCs in a dose‑dependent manner. Y25130 or SB269970 slightly inhibited GSP‑induced effects. However, Y25130 and SB269970 together completely blocked GSP-induced effects. In the presence of inhibitors of protein kinase C, protein kinase A, or mitogen-activated protein kinase, GSP‑induced ICC depolarization was inhibited. GSP increased the intestinal transit rate in normal mice and in mice with acetic acid-induced GI motility disorder. In addition, the levels of motilin and substance P were elevated after GSP dosing. These results demonstrate that GSP can regulate GI motility, and therefore, it is a potential therapeutic agent for treating GI motility disorders.     

Structural and functional biomarkers of the insula subregions predict sex differences in aggression subscales

Aggression is a common and complex social behavior that is associated with violence and mental diseases. Although sex differences were observed in aggression, the neural mechanism for the effect of sex on aggression behaviors remains unclear, especially in specific subscales of aggression. In this study, we investigated the effects of sex on aggression subscales, gray matter volume (GMV), and functional connectivity (FC) of each insula subregion as well as the correlation of aggression subscales with GMV and FC. This study found that sex significantly influenced (a) physical aggression, anger, and hostility; (b) the GMV of all insula subregions; and (c) the FC of the dorsal agranular insula (dIa), dorsal dysgranular insula (dId), and ventral dysgranular and granular insula (vId_vIg). Additionally, mediation analysis revealed that the GMV of bilateral dIa mediates the association between sex and physical aggression, and left dId–left medial orbital superior frontal gyrus FC mediates the relationship between sex and anger. These findings revealed the neural mechanism underlying the sex differences in aggression subscales and the important role of the insula in aggression differences between males and females. This finding could potentially explain sexual dimorphism in neuropsychiatric disorders and improve dysregulated aggressive behavior.     

高效毛细管电泳法同时测定尿液清蛋白和肌酐

目的建立同时测定尿液清蛋白和肌酐的高效毛细管电泳法。方法对缓冲系统、pH值、缓冲液的离子强度、检测波长、表面活性剂、电压及电流和进样方法等进行研究,建立同时测定清蛋白和肌酐的毛细管电泳法。结果选择20mmol/L、pH9.3硼砂-NaOH(含6mmol/LSDS)缓冲液作为毛细管区带电泳运行液,利用外标法定量,检测波长214nm,同时测定肌酐和清蛋白。非涂层毛细管有效长度47.5cm,内径75μm;电流79μA,压力进样1psi、4s,电泳时间为12min。肌酐和清蛋白的线性范围分别为4.32～8840μmol/L和1.95～1000mg/L,肌酐和清蛋白最低检出限分别为0.977μmol/L和0.285mg/L。本法的日内和日间变异系数均小于4.8%。肌酐和清蛋白的平均回收率分别为99.6%和102.4%。结论建立的方法线性范围宽,测定简单快速,可用于临床检测。     

气功对顽固性失眠的治疗措施

目的：介绍气功对顽固性失眠的治疗措施。方法：从失眠的病因病机、周天功及六字诀治疗失眠的功理等入手详细分析了治疗的原理和原则。结果：将周天功与六字诀相配合可以有效地取长补短,达到心火下降,肾水上滋,心肾相交的效果。结论：气功对于顽固性失眠具有良好的治疗效果。     

Lucentamycins A-D, cytotoxic peptides from the marine-derived actinomycete Nocardiopsis lucentensis

Four new 3-methyl-4-ethylideneproline-containing peptides, lucentamycins A-D (1-4), have been isolated from the fermentation broth of a marine-derived actinomycete identified by phylogenetic methods as Nocardiopsis lucentensis (strain CNR-712). The planar structures of the new compounds were assigned on the basis of 1D and 2D NMR spectroscopic techniques, while the absolute configurations of the amino acid residues were determined by application of the advanced Marfey method. Lucentamycins A (1) and B (2) showed significant in vitro cytotoxicity against HCT-116 human colon carcinoma.     

Regulation of PPAR-γ activity in lipid-laden hepatocytes affects macrophage polarization and inflammation in nonalcoholic fatty liver disease

BACKGROUNDLipid metabolism disorder and inflammatory-immune activation are vital triggers in the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Various studies have shown that PPAR-γ exerts potent anti-inflammatory and immunomodulatory properties. However, little is known about the regulation of PPAR-γ activity in modulating cell crosstalk in NAFLD.AIMTo investigate whether the regulation of PPAR-γ activity in lipid-laden hepatocytes affects macrophage polarization and inflammation.METHODSPrimary hepatocytes were isolated from wild-type C57BL6/J mice or hepatocyte-specific PPAR-γ knockout mice and incubated with free fatty acids (FFAs). Macrophages were incubated with conditioned medium (CM) from lipid-laden hepatocytes with or without a PPAR-γ agonist. Wild-type C57BL/6J mice were fed a high-fat (HF) diet and administered rosiglitazone.RESULTSPrimary hepatocytes exhibited significant lipid deposition and increased ROS production after incubation with FFAs. CM from lipid-laden hepatocytes promoted macrophage polarization to the M1 type and activation of the TLR4/NF-κB pathway. A PPAR-γ agonist ameliorated oxidative stress and NLRP3 inflammasome activation in lipid-laden hepatocytes and subsequently prevented M1 macrophage polarization. Hepatocyte-specific PPAR-γ deficiency aggravated oxidative stress and NLRP3 inflammasome activation in lipid-laden hepatocytes, which further promoted M1 macrophage polarization. Rosiglitazone administration improved oxidative stress and NLRP3 inflammasome activation in HF diet-induced NAFLD mice in vivo.CONCLUSIONUpregulation of PPAR-γ activity in hepatocytes alleviated NAFLD by modulating the crosstalk between hepatocytes and macrophages via the reactive oxygen species-NLRP3-IL-1β pathway.     

天冬天精的合成

本文通过全新的合成路线,以L-苯丙氨酸为起始化合物,经过甲酯化、游离、成内酐、缩合、水解、精制等6步反应得到天冬天精,总收率达到45．85％,较文献收率提高了8％,质量符合标准。