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Multiple liver metastases of unknown origin: A case report.
World J Gastrointest Oncol
January 2025
Department of Hepatobiliary Pancreatic Surgery, Peking University First Hospital, Beijing 100034, China.
Background: The liver is the most common site of digestive system tumor metastasis, but not all liver metastases can be traced back to the primary lesions. Although it is unusual, syphilis can impact the liver, manifesting as syphilitic hepatitis with inflammatory nodules, which might be misdiagnosed as metastasis.
Case Summary: This case report involves a 46-year-old female who developed right upper abdominal pain and intermittent low fever that persisted for more than three months.
Insights into Heterocycle Biosynthesis in the Cytotoxic Polyketide Alkaloid Janustatin A from a Plant-Associated Bacterium.
Biochemistry
January 2025
Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland.
Janustatin A is a potently cytotoxic polyketide alkaloid produced at trace amounts by the marine bacterial plant symbiont . Its biosynthetic terminus features an unusual pyridine-containing bicyclic system of unclear origin, in which polyketide and amino acid extension units appear reversed compared to the order of enzymatic modules in the polyketide synthase (PKS)-nonribosomal peptide synthetase (NRPS) assembly line. To elucidate unknown steps in heterocycle formation, we first established robust genome engineering tools in .
View Article and Find Full Text PDFThe Growing Phenomenon of 'Frozen' Virus Genome Sequences and Their Likely Origin in Research Facility Escapes.
Microorganisms
November 2024
Biology Department, University of Puerto Rico-Rio Piedras, San Juan 00931, Puerto Rico.
'Frozen' virus genome sequences are sampled from outbreaks and have unusually low sequence divergence when compared to genome sequences from historical strains. A growing number of 'frozen' virus genome sequences are being reported as virus genome sequencing becomes more common. Examples of 'frozen' sequences include the 1977 H1N1 'Russian' flu; Venezuelan Equine Encephalitis Virus from Venezuela and Colombia in 1995; E71 sequences from a Hand, Foot and Mouth outbreak in 2007-2009 in China; and a polio strain isolated in 2014 from Anhui, China.
View Article and Find Full Text PDFUnearthing the secrets of Australia's most enigmatic and cryptic mammal, the marsupial mole.
Sci Adv
January 2025
School of BioSciences, The University of Melbourne, Parkville, Victoria 3010, Australia.
The marsupial moles are arguably Australia's most enigmatic marsupials. Almost indistinguishable from placental (eutherian) moles, they provide a striking example of convergent evolution. Exploring the genome of the southern marsupial mole, we provide insights into its unusual biology.
View Article and Find Full Text PDFAtmospheric aggravation potential of a wastewater treatment plant concerning organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ether emissions.
Chemosphere
February 2025
Bursa Technical University, Department of Environmental Engineering, Bursa, Turkiye. Electronic address:
The pollution potential of a municipal wastewater treatment plant (WWTP) in Bursa, Türkiye, in terms of organochlorine pesticides (ΣOCPs), polychlorinated biphenyls (ΣPCBs), and polybrominated diphenyl ethers (ΣPBDEs), was investigated in air samples. Concentrations were determined using polyurethane foam disk samplers at key processes, such as the aeration tank (AT) and settling chamber (SC) of the WWTP and the background area (BA) at an urban site. Atmospheric concentration levels of PBDEs at the SC are 1.
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