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1

Macrobiotus naskreckii sp. nov., a new tardigrade (Eutardigrada: Macrobiotidae) of the hufelandi group from Mozambique

100%
Bakowski M., Roszkowska M., Gawlak M., Kaczmarek L.
Annales Zoologici
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2016
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tom 66
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nr 2
In this paper, Macrobiotus naskreckii sp. nov., a new species of the hufelandi group from the Gorongosa National Park in Mozambique, is described. The analysis have revealed that M. naskreckii sp. nov. is most similar to if. kristenseni, M. ramoli and M. serratus. The new species differs from M. kristenseni mainly through a different shape of egg processes and clearly dentate lunules IV; from M. ramoli mainly by smaller eggs and a smaller number of egg processes on the circumference; from M. serratus mainly by the absence of the reticulation between the egg processes. This is a third record of tardigrades from Mozambique and apart of the new species reported here, three other taxa from Gorongosa National Park are provided: Minibiotus cf. intermedins, Minibiotus sp. and Paramacrobiotus cf. richtersi.
2

Metabolic markers of active and anhydrobiotic tardigrades - preliminary results

88%
Roszkowska M., Karachitos A., Grabys D., Kaczmarek L., Kmita H.
Acta Biochimica Polonica
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2018
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tom 65
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nr S2
3

Revision of the genus Paramacrobiotus Guidetti et al., 2009 with the description of a new species, re-descriptions and a key

88%
Kaczmarek L., Gawlak M., Bartels P. J., Nelson D. R., Roszkowska M.
Annales Zoologici
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2017
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tom 67
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nr 4
Based on the original species descriptions, a review of the genus Paramacrobiotus was conducted. We divided the genus into two subgenera, Microplacoidus subgen. nov. and Paramacrobiotus subgen. nov., based on the presence or absence of a microplacoid, and characterized species within the genus based on seven different types of eggs. In a moss sample collected in Ecuador, Paramacrobiotus (Paramacrobiotus) spinosus sp. nov., was found. The new species differs from all species of the subgenus Paramacrobiotus by the presence of richtersi type eggs and from other species by morphometric characters. Additionally, in the Ecuadorian material we found P. (Microplacoidus) magdalenae comb, nov., which is the first record of this species in Ecuador, and we provide the full set of measurements for this species, not included in the original description. An additional new record is P. (M.) alekseevi comb. nov. found in Vietnam for the first time. After examining microscope slides from the Iharos’ collection deposited in the Hungarian Natural History Museum, we prepared re-descriptions of P. (P.) csotiensis comb nov., P. (M.) submorulatus comb. nov. and P. (M.) wauensis comb. nov. Based on the morphological and morphometric characters of adults and eggs, we developed a diagnostic key to the genus Paramacrobiotus.
4

Evaluation of mitochondrial energetic status and oxidative stress during tardigrade anhydrobiosis

88%
Karachitos A., Roszkowska M., Grobys D., Kaczmarek L., Kmita H.
Acta Biochimica Polonica
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2018
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tom 65
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nr S2
5

A cell adhesion molecule, dystroglycan, is implicated in homeostatic plasticity

76%
Figiel I., Krzystyniak A., Bartkowiak-Kaczmarek A., Roszkowska M., Bijata M., Wlodarczyk J.
Acta Neurobiologiae Experimentalis
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2017
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tom 77
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nr Suppl.1
INTRODUCTION: A number of studies have demonstrated that regulated proteolysis of synaptically expressed cell adhesion molecules plays a fundamental role in the morphological reorganization of synapses underlying homeostatic plasticity. One of the major modulators of these processes is matrix metalloproteinase-9 (MMP-9), an extracellularly operating protease. AIM(S): The main aim of our study is to investigate the subcellular localization of β‑dystroglycan (β‑DG), a well-known substrate of MMP-9, and its involvement in structural plasticity. METHOD(S): We analyzed isolated mouse synaptosomes from P2 fraction with flow cytometry after immunostaining with antibodies against synaptosomal markers and β‑DG. We also performed triple immunofluorescence labelling on primary hippocampal neurons. To study whether proteolytic cleavage of β‑DG influences the dendritic spine shape we performed life imaging of MMP-9-treated primary hippocampal cultures, previously infected with lentiviral vector (LV) coding shRNA specifically silencing DG or LV carrying GFP. Furthermore, we investigated the correlation between β‑DG localization and MMP-9 activity by using (FRET)-based MMP-9 activity biosensor. RESULTS: We found out that β‑DG is present on a small subset of synaptosomes that exhibit expression of both post-synaptic markers (psd-95 and gephyrin). Using immunofluorescence staining of primary neurons with pre-synaptic marker antibodies (v-GAT and v-GLUT) we confirmed β‑DG localization at both inhibitory and excitatory synapses. We also found changes in the number of β‑DG‑containing synapses in response to chemically induced LTP (cLTP). Morphometric analysis of live-cell imaging experiments revealed that β‑DG exerts an influence on dendritic spine structure. Moreover, the results concerning spatial location of MMP‑9 activity and β‑DG will be presented CONCLUSIONS: Our findings indicate β‑DG involvement in synaptic structural plasticity. FINANCIAL SUPPORT: This study has been supported by research grant 2015/19/B/NZ3/01376 from National Science Centre Poland.
6

Role of mitochondrial alternative oxidase in successful anhydrobiosis of the tardigrade Milnesium tardigradum

76%
Grobys D., Rzezniczak W., Kaczmarek L., Sobkowiak R., Roszkowska M., Kmita H.
Acta Biochimica Polonica
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2018
|
tom 65
|
nr S2
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