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Methylacidiphilum caldifontis gen. nov., sp. nov., a thermoacidophilic methane-oxidizing bacterium from an acidic geothermal environment, and descriptions of the family Methylacidiphilaceae fam. nov. and order Methylacidiphilales ord. nov.

Strain IT6T, a thermoacidophilic and facultative methane-oxidizing bacterium, was isolated from a mud-water mixture collected from Pisciarelli hot spring in Pozzuoli, Italy. The novel strain is white when grown in liquid or solid media and forms Gram-negative rod-shaped, non-flagellated, non-motile cells. It conserves energy by aerobically oxidizing methane and hydrogen while deriving carbon from carbon dioxide fixation. Strain IT6T had three complete pmoCAB operons encoding particulate methane monooxygenase and genes encoding group 1d and 3b [NiFe] hydrogenases. Simple carbon-carbon substrate…

Biochemical Analysis of Four Missense Mutations in the HSD17B3 Gene Associated With 46,XY Disorders of Sex Development in Egyptian Patients.

BACKGROUND: Mutations in the HSD17B3 gene are associated with a 46,XY disorder of sexual development (46,XY DSD) as a result of low testosterone production during embryogenesis. AIM: To elucidate the molecular basis of the disorder by chemically analyzing four missense mutations in HSD17B3 (T54A, M164T, L194P, G289S) from Egyptian patients with 46,XY DSD. METHODS: Expression plasmids for wild-type 17β-hydroxysteroid hydrogenase type 3 (17β-HSD3) and mutant enzymes generated by site-directed mutagenesis were transiently transfected into human HEK-293 cells. Protein expression was verified by …

Genome-resolved insights into the bacterial phylum WOR-3: hydrogenotrophic metabolism and unique carbon fixation via archaeal form III RuBisCO.

The WOR-3 phylum is widely distributed in various environments, including hot springs, marine ecosystems, and hydrothermal vents, yet its ec … n addition, all subgroups harbored key components of hydrogen metabolism, including widespread NiFe hydrogenases, supporting H2-dependent electron transfer and energy conservation. Within the WOR-3 lineage, the coexistence of two respiratory enzyme systems-the Rnf complex and the oxidative phosphorylation respiratory chain-indicates distinct anaerobic and aer …

Alcohol and cancer.

Epidemiological data have identified chronic alcohol consumption as a significant risk factor for upper alimentary tract cancer, including c … ucts folate and results in secondary hyperproliferation. Acetaldehyde is produced by tissue alcohol hydrogenases, cytochrome P 4502E1 and through bacterial oxidative metabolism in the upper and lower gastrointestinal tract. Its generation or its degradation is modulated due to functional polymorphisms of the genes coding for the enzymes. Acetaldehyde can also …

MMS19 links cytoplasmic iron-sulfur cluster assembly to DNA metabolism.

The function of many DNA metabolism proteins depends on their ability to coordinate an iron-sulfur (Fe-S) cluster. Biogenesis of Fe-S proteins is a multistep process that takes place in mitochondria and the cytoplasm, but how it is linked to nuclear Fe-S proteins is not known. Here, we demonstrate that MMS19 forms a complex with the cytoplasmic Fe-S assembly (CIA) proteins CIAO1, IOP1, and MIP18. Cytoplasmic MMS19 also binds to multiple nuclear Fe-S proteins involved in DNA metabolism. In the absence of MMS19, a failure to transfer Fe-S clusters to target proteins is associated with Fe-S prote

Микроаэробный маленький белок от теплового шока способствует ризобию лимуминозараму/Писуму симбиозу и взаимодействует с широким диапазоном бактерироидных белков.

Во время создания симбиоза с бобовыми растениями ризобия подвергается воздействию враждебной физической и химической микроокружающей среды, к которой требуется адаптация. Протеины реакции на стресс, включая небольшие белки от теплового удара (SHSP), ранее, как было установлено, дифференцировались в бактерироидах, индуцируемых ризобием лимуминозарум бv. viciae UPM791 в различных хост-узлах. В ходе этой работы мы провели функциональный анализ зависящих от принимающей стороны SHSP RLV_1399. Рlv_1399- Исключенный штамм мутантов был нарушен в симбиотических свойствах гороха, но не чечевиц. Выражени

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… Furthermore, HupL, the large structural subunit of the NiFe-hydrogenase, was also detected. … Nickel availability to pea (Pisum sativum L.) plants limits hydrogenase activity of Rhizobium leguminosarum bv. viciae bacteroids by affecting the processing of the hydrogenase structural subunits. J Bacteriol 176:5297–5303. doi: 10.1128/jb.176.17.5297-5303.1994 57. …

Characterization of Pairs of Toxic and Nontoxic Misfolded Protein Oligomers Elucidates the Structural Determinants of Oligomer Toxicity in Protein Misfolding Diseases.

The aberrant misfolding and aggregation of peptides and proteins into amyloid aggregates occurs in over 50 largely incurable protein misfold … athies. Furthermore, we also discuss oligomers formed by the 91-residue N-terminal domain of [NiFe]-hydrogenase maturation factor from E. coli, which we use as a model non-disease-related protein, and by an amyloid stretch of Sup35 prion protein from yeast. These oligomeric pairs have become highly useful experimental tools for studying the molecular determin …

Clinical characteristics of COVID-19 in 104 people with SARS-CoV-2 infection on the Diamond Princess cruise ship: a retrospective analysis.

BACKGROUND: The ongoing COVID-19 pandemic is a global threat. Identification of markers for symptom onset and disease progression is a press … ymptomatic, 43 (41%) as having mild COVID-19, and 28 (27%) as having severe COVID-19. Serum lactate hydrogenase concentrations were significantly higher in the ten participants who were asymptomatic on admission but developed symptomatic COVID-19 compared with the 33 participants who remained asymptomatic throughout the observation period (five [50%] vs four …

Risk factors of critical & mortal COVID-19 cases: A systematic literature review and meta-analysis.

BACKGROUND: An epidemic of Coronavirus Disease 2019 (COVID-19) began in December 2019 and triggered a Public Health Emergency of Internation … l/L, hypersensitive cardiac troponin I(hs-cTnI) > 28pg/mL, procalcitonin(PCT) > 0.5ng/mL, lactatede hydrogenase(LDH) > 245U/L, and D-dimer > 0.5mg/L predicted the deterioration of disease while white blood cells(WBC)<4 × 109/L meant a better clinical status[AST > 40U/L:OR=4.00, 95% CI (2.46, 6.52), P < 0.00001; Cr ≥ 133μmol/L: OR = 5.30, 95% CI (2.19, 12.83), …

Evidence for autotrophic growth of purple sulfur bacteria using pyrite as electron and sulfur source.

UNLABELLED: Purple sulfur bacteria (PSB) are capable of anoxygenic photosynthesis via oxidizing reduced sulfur compounds and are considered … genes are related to flagella/fimbriae/pilin(+), metal efflux(+), ferrienterochelin(-), and [NiFe] hydrogenases(+). Characterization of the biologically reacted pyrite indicates the presence of polymeric sulfur. These results have, for the first time, put the interplay of PSB and transition metal sulfide chemistry under the spotlight, with the potential to a …

Synthetic advances inspired by the bioactive dinitrosyl iron unit.

Resulting from biochemical iron-NO interactions, dinitrosyl iron complexes (DNICs) are small organometallic-like molecules, considered to se … sses in base metals. Hence such molecules may be viewed as synthetic analogues of [NiFe]- or [FeFe]-hydrogenase active sites in nature, both of which use bridging thiolates for connection of the two centers. A particular success was the development of an Fe(NO)N2S2·Fe(NO)2(+/0) redox pair for proton reduction electrocatalysis. Monomeric, reduced NHC-DNICs of …

Krill oil extract suppresses the proliferation of colorectal cancer cells through activation of caspase 3/9.

BackgroundCurrently available treatments for colorectal cancer (CRC) associate with numerous side-effects that reduce patients' quality of life. The effective nutraceuticals with high anti-proliferative efficacy and low side-effects are desirable. Our previous study has reported that free fatty acids extract (FFAE) of krill oil induced apoptosis of CRC cells, possibly associated with changes in mitochondrial membrane potential (MMP). The aims of this study were to compare the anti-proliferative efficacy of FFAE from krill oil on CRC cells with commonly used chemotherapeutic drug, Oxaliplatin,

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… Glyceraldehyde-3-phosphate de-hydrogenase (GADPH) (Abcam, ab9485, MA, USA) was used as the loading control. The protein detection was performed using enhancing chemiluminescence reagents (Clarity™ Western ECL Substrate, Bio-Rad, USA). … cyclo-oxygenase-2 Colorectal cancer 4,6-diamidino-2-phenylindole docosahexaenoic acid Dulbecco’s Modified Eagle’s Medium Dimethyl Sulfoxide eicosapentaenoic acid endoplasmic reticulum Foetal Calf serum Free Fatty Acids Free Fatty Acids Extractions of Krill Oil Glyceraldehydes-3-phosphate de-hydrogenase …

Unresponsive Thrombotic Thrombocytopenic Purpura (TTP): Challenges and Solutions.

Thrombotic thrombocytopenic purpura (TTP) is a thrombotic microangiopathy secondary to a severely decreased A Disintegrin And Metalloprotease with ThromboSpondin type 1 repeats 13 (ADAMTS13) activity, resulting in the formation of widespread von Willebrand factor - and platelet-rich microthrombi. ADAMTS13 deficiency is mainly acquired through anti-ADAMTS13 autoantibodies in adults. With modern standards of care, unresponsive TTP has become rarer with a frequency of refractory/relapsing forms dropping from >40% to <10%. As patients with unresponsive TTP are at increased risk of mortality, promp

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… in the 2003 British Committee for Standards in Haematology guidelines as cases who fail to reach a platelet rate above 150 G/L after 7 TPE sessions. 17 In the 2017 consensus on standardization of terminology on TTP, 18 response to therapy was defined as a platelet rate above 150 G/L and Lactate De Hydrogenase …

Association between risk of malnutrition defined by patient-generated subjective global assessment and adverse outcomes in patients with cancer: a systematic review and meta-analysis.

ObjectiveTo assess the association between the risk of malnutrition, as estimated by the Patient-Generated Subjective Global Assessment (PG-SGA) numerical scores, and adverse outcomes in oncology patients.DesignSystematic review and meta-analysis.SettingsA comprehensive search was conducted in PubMed, Web of Science, Embase, CKNI, VIP, Sinomed and Wanfang databases. Studies that examined the association between the risk of malnutrition, as estimated by the PG-SGA numerical scores, and overall survival (OS) or postoperative complications in oncology patients were included. Patients were classif

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… Table 1 Main characteristic of the included studies P, prospective; OS, overall survival; R, retrospective; ISS, International Staging System; LDH, lactate hydrogenase; FISH, fluorescence in situ hybridization; ASCT, autologous stem cell transplantation; CRC, colorectal cancer; TNM, tumour node metastasis …

Role of Stem Cell Transplantation in Multiple Myeloma.

Autologous stem cell transplantation (auto-SCT) has been the standard of care in eligible newly diagnosed multiple myeloma (MM) patients. Outcomes of patients with MM have improved significantly due to the advent of several novel drugs. Upfront use of these drugs in induction therapy has significantly increased the rate and depth of responses that have translated into longer remission and survival. This has now raised a debate regarding the role and relevance of auto-SCT in the management of myeloma. However, clinical trials have confirmed the utility of auto-SCT even in the era of novel drugs

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… Transplantation committee. (1) Allogeneic HCT should be considered appropriate therapy for any eligible patient with early relapse (less than 24 months) after primary therapy that included an ASCT and/or high-risk features (i.e., cytogenetics, extramedullary disease, plasma cell leukemia, or high lactate de-hydrogenase …

Nanoparticles Based Therapeutic Approaches in Oncogenic Viral Infections: A Review.

Nanotechnology has revolutionized biomedical research by providing novel strategies for the prevention, diagnosis, and treatment of oncogenic viral infections. Nanoparticles, possessing tunable physicochemical properties, enable targeted drug delivery, enhance vaccine efficacy, and facilitate advanced viral diagnostics, addressing key limitations of conventional therapies. Oncogenic viruses contribute substantially to the global burden of cancer through persistent infections and are influenced by environmental and lifestyle factors. The objective of this review is to synthesize and critically

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… As the concentration dependence increases, lactate hydrogenase leaks into the membrane, disrupting mitochondria’s functions. 164 Some potential considerations regarding AgNPs could affect their toxicity in the body and restrict their use. …

Plants as a Source of Anticancer Agents: From Bench to Bedside.

Cancer is the second leading cause of death after cardiovascular diseases. Conventional anticancer therapies are associated with lack of selectivity and serious side effects. Cancer hallmarks are biological capabilities acquired by cancer cells during neoplastic transformation. Targeting multiple cancer hallmarks is a promising strategy to treat cancer. The diversity in chemical structure and the relatively low toxicity make plant-derived natural products a promising source for the development of new and more effective anticancer therapies that have the capacity to target multiple hallmarks in

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… Moreover, curcumin also acts as a good scavenger for different forms of free radicals, such as reactive oxygen (ROS) and reactive nitrogen species (RNS), and inhibits ROS-generating enzymes such as lipoxygenase/cyclooxygenase and xanthine hydrogenase/oxidase [ 88 , 89 , 90 ]. …

Iron in the Tumor Microenvironment-Connecting the Dots.

Iron metabolism and tumor biology are intimately linked. Iron facilitates the production of oxygen radicals, which may either result in iron-induced cell death, ferroptosis, or contribute to mutagenicity and malignant transformation. Once transformed, malignant cells require high amounts of iron for proliferation. In addition, iron has multiple regulatory effects on the immune system, thus affecting tumor surveillance by immune cells. For these reasons, inconsiderate iron supplementation in cancer patients has the potential of worsening disease course and outcome. On the other hand, chronic im

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… Iron and the hypoxic response are linked in normal and malignant cells Systemic and cellular adaptation to changeable concentrations of oxygen in the environment and within the tissue stays under control of evolutionary-conserved pathway of iron- and 2-oxoglutarate-dependent prolyl/aspartyl hydrogenases …