The Morphological Transformation of the Thorax during the Eclosion of Drosophila melanogaster (Diptera: Drosophilidae).

The model organism Drosophila melanogaster, as a species of Holometabola, undergoes a series of transformations during metamorphosis. To deeply understand its development, it is crucial to study its anatomy during the key developmental stages. We describe the anatomical systems of the thorax, including the endoskeleton, musculature, nervous ganglion, and digestive system, from the late pupal stage to the adult stage, based on micro-CT and 3D visualizations. The development of the endoskeleton causes original and insertional changes in muscles. Several muscles change their shape during development in a non-uniform manner with respect to both absolute and relative size; some become longer and broader, while others shorten and become narrower. Muscular shape may vary during development. The number of muscular bundles also increases or decreases. Growing muscles are probably anchored by the tissues in the stroma. Some muscles and tendons are absent in the adult stage, possibly due to the hardened sclerites. Nearly all flight muscles are present by the third day of the pupal stage, which may be due to the presence of more myofibers with enough mitochondria to support flight power. There are sexual differences in the same developmental period. In contrast to the endodermal digestive system, the functions of most thoracic muscles change in the development from the larva to the adult in order to support more complex locomotion under the control of a more structured ventral nerve cord based on the serial homology proposed herein.

The effects of physical activity on depression and quality of life in Chinese perimenopausal women.

BACKGROUND: Women are more likely to experience depressive symptoms and poor quality of life (QoL) during perimenopause. The effectiveness of physical activity (PA) in perimenopause on mental well-being and health outcomes has been frequently reported. This study aimed to investigate the mediating effect of PA on the relationship between depression and QoL in Chinese perimenopausal women. METHODS: A cross-sectional study was performed, and participants were recruited through a multistage, stratified, probability proportional to size sampling method. Depression, PA, and QoL were measured by Zung Self-rating Depression Scale, Physical Activity Rating Scale-3, and World Health Organization Quality of Life Questionnaire. The direct and indirect effects of PA on QoL were analyzed by PA in a mediation framework. RESULTS: 1100 perimenopausal women participated in the study. PA mainly plays partial mediating roles in the relationship between depression and physical (ab = -0.493, 95 % CI: -0.582 to -0.407; ab = -0.449, 95 % CI: -0.553 to -0.343) and psychological (ab = -0.710, 95 % CI: -0.849 to -0.578; ab = -0.721, 95 % CI: -0.853 to -0.589; ab = -0.670, 95 % CI: -0.821 to -0.508) domains of QoL. Additionally, intensity (ab = -0.496, 95 % CI: -0.602 to -0.396; ab = -0.355, 95 % CI: -0.498 to -0.212) and duration (ab = -0.201, 95 % CI: -0.298 to -0.119; ab = -0.134, 95 % CI: -0.237 to -0.047) intermediated the relationship between moderate-to-severe depression and physical domain; frequency (ab = -0.130, 95 % CI: -0.207 to -0.066) only had a mediation influence between moderate depression and physical domain; intensity (ab = -0.583, 95 % CI: -0.712 to -0.460; ab = -0.709, 95 % CI: -0.854 to -0.561; ab = -0.520, 95 % CI: -0.719 to -0.315), duration (ab = -0.433, 95 % CI: -0.559 to -0.311; ab = -0.389, 95 % CI: -0.547 to -0.228; ab = -0.258, 95 % CI: -0.461 to -0.085), and frequency (ab = -0.365, 95 % CI: -0.493 to -0.247; ab = -0.270, 95 % CI: -0.414 to -0.144) all interceded between the psychological domain and all levels of depression, except for the frequency between severe depression and psychological domain; in terms of social relationship and environment domains, intensity (ab = -0.458, 95 % CI: -0.593 to -0.338; ab = -0.582, 95 % CI: -0.724 to -0.445), duration (ab = -0.397, 95 % CI: -0.526 to -0.282; ab = -0.412, 95 % CI: -0.548 to -0.293), and frequency (ab = -0.231, 95 % CI: -0.353 to -0.123; ab = -0.398, 95 % CI: -0.533 to -0.279) were mediators only on mild depression. LIMITATIONS: The cross-sectional study and self-reported data are major limiting factors. CONCLUSION: PA and its components partially mediated the association between depression and QoL. Suitable prevention methods and interventions for PA may improve the QoL for perimenopausal women.

Mitochondrial Phylogenomics Suggests Complex Evolutionary Pattern of Pronotal Foliaceous Mimicry in Hierodulinae (Mantodea: Mantidae), with Description of a New Species of Rhombodera Burmeister, 1838 from China.

Hierodulinae is a species-rich mantid subfamily, with some species bearing a notable leaf-like pronotum. However, the evolutionary pattern and taxonomic significance of the leaf-like pronotum are largely unknown. Here, we present a phylogenomic analysis of the Hierodulinae genera Rhombodera Burmeister, 1838, and Hierodula Burmeister, 1838 based on mitochondrial genomes. We also describe a new species, namely Rhombodera hyalina sp. nov. from Guangxi, China. Our phylogenetic result, together with the evidence from male genitalia, suggests the division of the Oriental Hierodula and Rhombodera complex into three clades. We find a complex pattern on the evolution of the leaf-like pronotum, which is present in at least five lineages, respectively, of the above three clades.

A high-quality genome of the dobsonfly Neoneuromus ignobilis reveals molecular convergences in aquatic insects.

Neoneuromus ignobilis is an archaic holometabolous aquatic predatory insect. However, a lack of genomic resources hinders the use of whole genome sequencing to explore their genetic basis and molecular mechanisms for adaptive evolution. Here, we provided a high-contiguity, chromosome-level genome assembly of N. ignobilis using high coverage Nanopore and PacBio reads with the Hi-C technique. The final assembly is 480.67 MB in size, containing 12 telomere-ended pseudochromosomes with only 17 gaps. We compared 42 hexapod species genomes including six independent lineages comprising 11 aquatic insects, and found convergent expansions of long wavelength-sensitive and blue-sensitive opsins, thermal stress response TRP channels, and sulfotransferases in aquatic insects, which may be related to their aquatic adaptation. We also detected strong nonrandom signals of convergent amino acid substitutions in aquatic insects. Collectively, our comparative genomic analysis revealed the evidence of molecular convergences in aquatic insects during both gene family evolution and convergent amino acid substitutions.

Cellular localization of the FMRP in rat retina.

The fragile X mental retardation protein (FMRP) is a regulator of local translation through its mRNA targets in the neurons. Previous studies have demonstrated that FMRP may function in distinct ways during the development of different visual subcircuits. However, the localization of the FMRP in different types of retinal cells is unclear. In this work, the FMRP expression in rat retina was detected by Western blot and immunofluorescence double labeling. Results showed that the FMRP expression could be detected in rat retina and that the FMRP had a strong immunoreaction (IR) in the ganglion cell (GC) layer, inner nucleus layer (INL), and outer plexiform layer (OPL) of rat retina. In the outer retina, the bipolar cells (BCs) labeled by homeobox protein ChX10 (ChX10) and the horizontal cells (HCs) labeled by calbindin (CB) were FMRP-positive. In the inner retina, GABAergic amacrine cells (ACs) labeled by glutamate decarbonylase colocalized with the FMRP. The dopaminergic ACs (tyrosine hydroxylase marker) and cholinergic ACs (choline acetyltransferase (ChAT) marker) were co-labeled with the FMRP. In most GCs (labeled by Brn3a) and melanopsin-positive intrinsically photosensitive retinal GCs (ipRGCs) were also FMRP-positive. The FMRP expression was observed in the cellular retinal binding protein-positive Müller cells. These results suggest that the FMRP could be involved in the visual pathway transmission.

A highly selective and ultrafast near-infrared fluorescent turn-on and colorimetric probe for hypochlorite in living cells.

Hypochlorous acid (HOCl)/hypochlorite (OCl-), important reactive oxygen species, play essential roles in many physiological and pathological progresses. Accordingly, we developed a novel dicyanomethylene-4H-pyran (DCM)-based probe DCM-OCl for colorimetric and near-infrared fluorescent turn-on detection of OCl-. The probe exhibited excellent selectivity and sensitivity for OCl- over other bio-related analytes with a detection limit of 80 nM. The excellent selectivity of DCM-OCl for OCl- was ascribed to specific oxidative cleavage of the dimethylthiocarbamate (DMTC) recognition unit by OCl-. Moreover, DCM-OCl exhibited an ultrafast turn-on response (<3 s) to OCl-, potentially allowing real-time detection of OCl-. Furthermore, DCM-OCl was successfully used to image endogenous/exogenous OCl- in living cells.

New long-proboscid lacewings of the mid-Cretaceous provide insights into ancient plant-pollinator interactions.

Many insects with long-proboscid mouthparts are among the pollinators of seed plants. Several cases of the long-proboscid pollination mode are known between fossil insects (e.g., true flies, scorpionflies, and lacewings) and various extinct gymnosperm lineages, beginning in the Early Permian and increasing during the Middle Jurassic to Early Cretaceous. However, details on the morphology of lacewing proboscides and the relevant pollination habit are largely lacking. Here we report on three lacewing species that belong to two new genera and a described genus from mid-Cretaceous (Albian-Cenomanian) amber of Myanmar. All these species possess relatively long proboscides, which are considered to be modified from maxillary and labial elements, probably functioning as a temporary siphon for feeding on nectar. Remarkably, these proboscides range from 0.4-1.0 mm in length and are attributed to the most diminutive ones among the contemporary long-proboscid insect pollinators. Further, they clearly differ from other long-proboscid lacewings which have a much longer siphon. The phylogenetic analysis indicates that these Burmese long-proboscid lacewings belong to the superfamily Psychopsoidea but cannot be placed into any known family. The present findings represent the first description of the mouthparts of long-proboscid lacewings preserved in amber and highlight the evolutionary diversification of the ancient plant-pollinator interactions.

Brockphasma spinifemoralis gen. et spec. nov.: a new phasmid genus and new species of Neohiraseini (Phasmida: Necrosciinae) from Vietnam.

A new genus of stick insects, Brockphasma Ho gen. nov., with the type-species, Brockphasma spinifemoralis Ho, Liu, Bresseel & Constant spec. nov., is described and illustrated from Vietnam. Both sexes, the egg and the first instar nymph are described and figured. Data on the habitat and natural foodplants are provided. Brockphasma Ho gen. nov. is differentiated from other genera in Neohiraseini by spinose occiput, anterior region of mesonotum with a spinose hump and spinose anterodorsal and posterodorsal carinae of femora. A key to the genera of Neohiraseini from Vietnam is given.

[Occurrence of quinolone and sulfonamide antibiotics in swine and cattle manures from large-scale feeding operations of Guangdong Province].

The occurrence and distribution of four quinolones and four sulfonamides in swine and cattle feces sampled from twenty large-scale feeding operations in different areas of Guangdong province were detected using solid phase extraction (SPE) and high performance liquid chromatography (HPLC). Quinolone and sulfonamide compounds were observed in all pig dung samples. Their total concentrations ranged from 24.5 microg/kg to 1516.2 microg/kg (F. W.) with an average of 581.0 microg/kg and ranged from 1925.9-13399.5 microg/kg with an average of 4403.9 microg/kg respectively. The dominant compounds in pig feces were ciprofloxacin and enrofloxacin for quinolones and sulfamerazine and sulfamethoxazole for sulfonamides. Quinolone compounds which dominated with norfloxacin and ciprofloxacin were also observed in all cattle dung samples, its total concentrations ranged from 73.2 microg/kg to 1328.0 microg/kg which averaged 572.9 microg/kg. While the positive rates of sulfonamide compounds detected in cattle dung samples were above 90%, predominated by sulfamethoxazole and sulfamerazine. Concentration and distribution of both quinolone and sulfonamide compounds in swine and cattle dungs of different feeding operations varied greatly. Relatively high concentrations of the two kinds of antibiotics were found in both swine and cattle dungs from Guangzhou area, while sulfameter and sulfamethazine in cattle dungs from Foshan and Shenzhen areas were below the limit of detection.