[Seasonal Variation, Source Identification, and Health Risk of PM-bound Metals in Xinxiang].

This study analyzed the seasonal variation, sources, and source-specific health risks of PM-bound metals in Xinxiang city, Henan province. A total of 112 daily PM samples were collected over four consecutive seasons during 2019-2020. In total, 19 elements were identified using inductively coupled plasma atomic emission spectroscopy (ICP-AES).

Juvenile Hormone-Sensitive Ribosomal Activity Enhances Viral Replication in Aedes aegypti.

Zika virus (ZIKV; ) is a devastating virus transmitted to humans by the mosquito Aedes aegypti. The interaction of the virus with the mosquito vector is poorly known. The double-stranded RNA (dsRNA)-mediated interruption or activation of immunity-related genes in the Toll, IMD, JAK-STAT, and short interfering RNA (siRNA) pathways did not affect ZIKV infection in A.

S100A4+ macrophages facilitate zika virus invasion and persistence in the seminiferous tubules via interferon-gamma mediation.

Testicular invasion and persistence are features of Zika virus (ZIKV), but their mechanisms are still unknown. Here, we showed that S100A4+ macrophages, a myeloid macrophage subpopulation with susceptibility to ZIKV infection, facilitated ZIKV invasion and persistence in the seminiferous tubules. In ZIKV-infected mice, S100A4+ macrophages were specifically recruited into the interstitial space of testes and differentiated into interferon-γ-expressing M1 macrophages.

Aedes aegypti HPX8C modulates immune responses against viral infection.

Mosquitoes act as vectors of numerous pathogens that cause human diseases. Dengue virus (DENV) transmitted by mosquito, Aedes aegypti, is responsible for dengue fever epidemics worldwide with a serious impact on human health. Currently, disease control mainly relies on vector targeted intervention strategies.

The immune strategies of mosquito Aedes aegypti against microbial infection.

Yellow fever mosquito Aedes aegypti transmits many devastating arthropod-borne viruses (arboviruses), such as dengue virus, yellow fever virus, Chikungunya virus, and Zika virus, which cause great concern to human health. Mosquito control is an effective method to block the spread of infectious diseases. Ae.

3-Benzyl-6-butyl-5-propyl-3H-1,2,3-triazolo[4,5-d]pyrimidin-7(6H)-one.

In the title compound, C(18)H(23)N(5)O(2), the triazolopyrimidine ring system is essentially planar, with a maximum displacement of 0.032 (2) Å, and forms a dihedral angle of 87.59 (15)° with the phenyl ring.

A facile synthesis and fungicidal activities of 2-(alkylamino)-5,6-dimethylthieno[2,3-d]pyrimidin-4(3H)-ones.

The aza-Wittig reactions of iminophosphorane 3 with aromatic isocyanates generated carbodiimides 4, which were reacted with alkylamines under mild conditions to give a series of 2-(alkylamino)-5,6-dimethylthieno[2,3-d]pyrimidin-4(3H)-ones 6 and 8 in satisfactory yield. Their structures were confirmed by (1)H NMR, EI-MS, IR and elementary analysis, and compound 8c was further analyzed by single-crystal X-ray diffraction. The preliminary bioassays indicated that these compounds showed excellent fungicidal activities against six kinds of fungi.

Ethyl 2-isopropyl-amino-5-methyl-4-oxo-3-phenyl-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxyl-ate.

The title compound, C(19)H(21)N(3)O(3)S, was synthesized via an aza-Wittig reaction of a functionalized imino-phospho-rane with phenyl isocyanate under mild conditions. In the mol-ecule, the fused thienopyrimidine ring system makes a dihedral angle of 66.30 (11)° with the phenyl ring.

3-Isopropyl-2-(4-methoxy-phen-oxy)-1-benzo-furo[3,2-d]pyrimidin-4(3H)-one.

In the title compound, C(20)H(18)N(2)O(4), all non-H atoms of the three fused rings of the benzofuro[3,2-d]pyrimidine system are almost coplanar (r.m.s.

Ethyl 5-methyl-4-oxo-3-phenyl-2-propyl-amino-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxyl-ate.

The title compound, C(19)H(21)N(3)O(3)S, was synthesized via the aza-Wittig reaction of functionalized imino-phospho-rane with phenyl isocyanate under mild conditions. In the mol-ecule, the fused thienopyrimidine ring system is essentially planar, with a maximum deviation of 0.072 (2) Å, and makes a dihedral angle of 60.

[Construction of a eukaryotic vector expressing MASPIN gene and its effect on cell apoptosis in gastric cancer cell line SGC7901].

Background & Objective: MASPIN gene is closely associated with carcinogengsis and plays a key role in cell proliferation, adhesion, migration and apoptosis. This study was to construct a recombinant eukaryotic vector expressing MASPIN, and explore the effect of MASPIN overexpression on the apoptosis in human gastric carcinoma cell line SGC7901.

Methods: A eukaryotic expression vector MASIPIN/PCR2.

Ethyl 1-[(2-chloro-1,3-thia-zol-5-yl)methyl]-5-methyl-1H-1,2,3-triazole-4-carboxylate.

In the title compound, C(10)H(11)ClN(4)O(2)S, the triazole ring carries methyl and ethoxy-carbonyl groups and is bound via a methyl-ene bridge to a chloro-thia-zole unit. There is also evidence for significant electron delocalization in the triazolyl system. Intra- and inter-molecular C-H⋯O hydrogen bonds together with strong π-π stacking inter-actions [centroid-centroid distance 3.

Ethyl 1-(6-chloro-3-pyridylmeth-yl)-5-ethoxy-methyl-eneamino-1H-1,2,3-triazole-4-carboxyl-ate.

In the title compound, C(14)H(16)ClN(5)O(3), there is evidence for significant electron delocalization in the triazolyl system. Intra-molecular C-H⋯O and inter-molecular C-H⋯O and C-H⋯N hydrogen bonds stabilize the structure.

[Analysis of bcl-6 protein expression and gene rearrangement in diffuse large B-cell lymphoma].

Objective: To investigate bcl-6 protein expression and gene rearrangement patterns in diffuse large B-cell lymphoma (DLBCL) and their clinicopathologic significance.

Methods: Immunohistochemical studies for bcl-6 and CD10 proteins were performed on 51 cases of DLBCL paraffin-embedded tissues (including 22 nodal samples and 29 extranodal samples) and 10 cases of reactive lymphoid hyperplasia (RLH) paraffin-embedded tissues. Interphase fluorescence in-situ hybridization (FISH) with dual color breakapart probe was also used to identify rearrangement of bcl-6 gene in 32 cases of nodal DLBCL tissues (including 22 paraffin-embedded samples and 10 fresh samples) and 5 cases of RLH paraffin-embedded tissues.

Identification of two critical amino acid residues of the severe acute respiratory syndrome coronavirus spike protein for its variation in zoonotic tropism transition via a double substitution strategy.

Severe acute respiratory syndrome coronavirus (SARS-CoV) is a recently identified human coronavirus. The extremely high homology of the viral genomic sequences between the viruses isolated from human (huSARS-CoV) and those of palm civet origin (pcSARS-CoV) suggested possible palm civet-to-human transmission. Genetic analysis revealed that the spike (S) protein of pcSARS-CoV and huSARS-CoV was subjected to the strongest positive selection pressure during transmission, and there were six amino acid residues within the receptor-binding domain of the S protein being potentially important for SARS progression and tropism.

C-kit gene mutation in human gastrointestinal stromal tumors.

Aim: To investigate the significance of c-kit gene mutation in gastrointestinal stromal tumors (GIST).

Methods: Fifty two cases of GIST and 28 cases of other tumors were examined. DNA samples were extracted from paraffin sections and fresh blocks.

[Clinicopathological, immunohistochemical and molecular genetic study of intra-abdomen extra-gastrointestinal stromal tumors].

Objective: To explore the clinicopathological, immunohistochemical and molecular genetic features of intra-abdomen extra-gastrointestinal stromal tumors (EGISTs) and their differential diagnosis.

Methods: Nine cases of EGISTs from the abdominal cavity or retroperitoneum which were previously diagnosed as leiomyoma, leiomyoblastoma, or leiomyosarcoma etc. by a panel of antibodies such as CD117, CD34, alpha-SMA, MSA, desmin, S-100, and PGP9.