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Communication between gut microbiota-derived metabolites and the tumor microenvironment.

The gut microbiota has been increasingly recognized as a critical player in maintaining human health and influencing disease development. The tumor microenvironment (TME) is pivotal in tumor development and progression, comprising immune cells, stromal elements, extracellular matrix components, and cytokines. Recent studies have highlighted the promising potential of gut microbiota-derived metabolites (e.g., short-chain fatty acids, bile acids, polyamines, and tryptophan derivatives) to reshape the TME in various ways, generating significant interest for the development of novel therapeutic st

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… Bile acids are primarily synthesized in the liver from cholesterol to modulate host physiology and immune functions, and further interact with the gut microbiota to undergo various biotransformation, generating secondary bile acids (e.g., deoxycholic acid [DCA], lithocholic acid [LCA]) ( 6 , 7 ). … Lithocholic acid derivatives, such as 3-oxoLCA and isoalloLCA, could exhibit reciprocal effects by inhibiting Th17/Treg differentiation and enhancing Treg generation ( 38 ). …

Pharmacomicrobiomics in precision cancer therapy: bench to bedside.

The burgeoning field of pharmacomicrobiomics offers promising insights into the intricate interplay between the microbiome and cancer, shaping responses to diverse treatment modalities. This review aims to analyze the molecular mechanisms underlying interactions between distinct microbiota types and cancer, as well as their influence on treatment outcomes. We explore how the microbiome impacts antitumor immunity, and response to chemotherapy, immunotherapy, and radiation therapy, unveiling its multifaceted roles in cancer progression and therapy resistance. Moreover, we discuss the challenges

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… . | - In experiments with mice and in laboratory studies, lithocholic acid (LCA), a secondary bile acid, decreased cancer cell proliferation and VEGF production, as well as reduced the aggressiveness and metastatic potential of primary tumors. - BC patients reduced abundance of baiH in Clostridium sordelli … acid (LCA), a bacterial metabolite. …

Фармакомикробиомика: От взаимодействия хост-микробиома-наркотики к клиническому переводу в докторскую медицину.

Заметная межиндивидуальная изменчивость реакции на наркотики по-прежнему является серьезной проблемой в области клинической фармакологии и не может быть в полной мере объяснена только генетикой принимающей страны. Растущие данные свидетельствуют о том, что кишечная микробиота является дополнительным фактором, определяющим эффективность и токсичность наркотиков посредством двустороннего взаимодействия с фармакологической терапией. Это признание привело к появлению фармакомикробиомики - области, которая изучает, как микробные сообщества влияют на утилизацию наркотиков и реагирование на них, и ка

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… Microbial metabolites, including SCFAs produced by bacterial species such as Faecalibacterium prausnitzii , Roseburia spp., and Eubacterium rectale , as well as secondary bile acids such as deoxycholic and lithocholic acids, derived from bacteria with 7α-dehydroxylase activity such as Clostridium scindens …

Микробиота человека в области здравоохранения и отдельные раковые заболевания.

Большинство эпителиальных поверхностей нашего тела, пищеварительный тракт, дыхательные и врожденные системы, колонизируются большим количеством бактерий, археи, грибов, протозоанов и вирусов. Эти микробиота, особенно кишки, играют важную и полезную роль в пищеварении, метаболизме и синтезе витаминов. Их метаболиты стимулируют производство цитокина человеком, которое используется против потенциальных патогенов. На состав микробиоты влияет ряд внутренних и внешних факторов, включая питание, возраст, болезни и образ жизни. Такие изменения, называемые дисбиозом, могут быть связаны с развитием разл

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… Gut Microbiota and Bile Acids The gut microbiota is known to synthesize secondary bile acids (BAs), deoxycholic acid (DCA), ursedeoxycholic acid (UDCA) and lithocholic acid (LCA) from cholesterol derived from the human liver [ 33 ]. …

The Gut-Bone Marrow Axis: Deciphering the Mechanistic Impact of Microbial Metabolites on Hematopoietic Homeostasis and Disorders.

The gut microbiota is increasingly recognized as a dynamic endocrine-like microbial network that exerts systemic effects far beyond the gastrointestinal tract. Emerging evidence supports the existence of a "gut-bone marrow axis" through which gut-derived signals orchestrate hematopoietic homeostasis. However, shifting from correlative observations to causal mechanisms remains a major challenge in defining precise microbial impacts on hematopoietic outcomes. In this review, we systematically synthesize current knowledge on the molecular mechanisms by which microbial products-specifically short-

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… These free substrates are then 7α-dehydroxylated by Firmicutes via the bai operon to form secondary bile acids, including deoxycholic acid (DCA) and lithocholic acid (LCA) [ 55 , 56 ]. …

Роль кишечника микробиота-митохондрия в нейродегенерации: основополагающие механизмы и потенциальные методы лечения.

Появляющиеся данные свидетельствуют о том, что микробиота кишечника тесно связана с патологическими проявлениями множественных нейродегенеративных заболеваний через ось кишечника, которая относится к перекрестку между кишечником и центральной нервной системой. Еще важнее то, что митохондрия считается выдающимся посредником взаимодействия между кишечной микробиотой и мозгом. Кишечные микробы могут модифицировать функцию митохондриала в центральной нервной системе, чтобы повлиять на развитие нейродегенеративных заболеваний. Митохондрия необходима для удовлетворения значительных потребностей носи

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… Ursodeoxycholic acid (UDCA), lithocholic acid, and deoxycholic acid are common secondary bile acids. …

Curcumin Formulations for Better Bioavailability: What We Learned from Clinical Trials Thus Far?

Curcumin has been credited with a wide spectrum of pharmacological properties for the prevention and treatment of several chronic diseases such as arthritis, autoimmune diseases, cancer, cardiovascular diseases, diabetes, hemoglobinopathies, hypertension, infectious diseases, inflammation, metabolic syndrome, neurological diseases, obesity, and skin diseases. However, due to its weak solubility and bioavailability, it has limited potential as an oral medication. Numerous factors including low water solubility, poor intestinal permeability, instability at alkaline pH, and fast metabolism contri

Регулирование питания иммунной системы кишечного мозга происходит на протяжении всей жизни.

Иммунная ось кишечника объединяет микробные, иммунные и нейронные сигналы для регулирования нейроразвития, гомеостаза и подверженности болезням. Раннее питание, в частности молочные олигозакариды, формирует благотворный микробиотический состав, повышает гиппокампальную пластичность, способствует антивоспалительной микроглианской поляризации и поощряет иммунную терпимость. Микробиота - метаболиты гута, включая короткоцепные жирные кислоты, производные триптофана и вторичные желчные кислоты, регулируют микроглиатическое созревание, функцию астроцита, дифференциацию клеток Т, производство нейротр

Human microbiomes in cancer development and therapy.

Colonies formed by bacteria, archaea, fungi, and viral groups and their genomes, metabolites, and expressed proteins constitute complex human microbiomes. An increasing evidences showed that carcinogenesis and disease progression were link to microbiomes. Different organ sources, their microbial species, and their metabolites are different; the mechanisms of carcinogenic or procancerous are also different. Here, we summarize how microbiomes contribute to carcinogenesis and disease progression in cancers of the skin, mouth, esophagus, lung, gastrointestinal, genital, blood, and lymph malignancy

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… Apart from SCFAs, other bacteria metabolites also were involved in carcinogenesis. 38 A high‐fat diet increases secondary bile acids such as deoxycholic acid (DCA) and lithocholic acid (LCA), which can cause colonic inflammation and cancer 39 , 40 (Figure 1 ). …

Causal Relationship Between Gut Microbiota and Leukemia: Future Perspectives.

The gut microbiota plays a crucial role in maintaining homeostasis in the human gastrointestinal tract. Numerous studies have shown a strong association between the gut microbiota and the emergence and progression of various diseases. Leukemia is one of the most common hematologic malignancies. Although standardized protocols and expert consensus have been developed for routine diagnosis and treatment, limitations remain due to individual differences. Nevertheless, a large number of studies have established a link between the gut microbiota and leukemia, with disturbances in the gut microbiota

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… For example, in colorectal cancer (CRC), the gut microbiota metabolites deoxycholic acid (DCA) and lithocholic acid (LCA) may contribute to CRC development through modulation of cell signaling cascades and membrane perturbation effects [ 55 , 56 ]. …

Изучение связи между ядерными рецепторами в гематологических галереях.

Гематологические магнации (ГМ) представляют собой подмножество новообразований, затрагивающих кровь, костный мозг и лимфатические системы, которые в основном подразделяются на лейкемию, лимфому и множественную миелому. Их прогнозы значительно отличаются друг от друга, причем, несмотря на текущее лечение, часто возникает опасность рецидива. Несмотря на то, что современные терапевтические стратегии расширили общее выживание пациентов, они не предлагают лечения на продвинутых этапах и часто приводят к таким проблемам, как приобретение лекарственной устойчивости, рецидивы и серьезные побочные эффе

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… Additionally, this receptor recognizes lithocholic acid, a secondary bile acid. …

Obesity, Bariatric Surgery, and Cancer Risk: Nutritional Perspectives and Long-Term Clinical Implications.

Obesity is recognized as a causal risk factor for the development of multiple cancers, with risk magnitude varying by tumor site, sex, life stage, and adipose tissue distribution. This narrative review synthesizes recent epidemiological evidence linking excess body fatness with cancer incidence and mortality and integrates the biological mechanisms that explain this association. Chronic low-grade inflammation, insulin resistance with compensatory hyperinsulinemia, dysregulation of adipose-derived hormones and sex steroids, impairment of anti-tumor immune responses, alterations in the gut micro

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… A 2024 pilot study reported lower fecal lithocholic acid concentrations and reduced abundance of bacterial genes required for BA metabolism after BS, directly discussing these changes as potential modulators of the CRC cascade [ 239 ]. …

Pediatric Drug Development: Reviewing Challenges and Opportunities by Tracking Innovative Therapies.

The paradigm of pediatric drug development has been evolving in a "carrot-and-stick"-based tactic to address population-specific issues. However, the off-label prescription of adult medicines to pediatric patients remains a feature of clinical practice, which may compromise the age-appropriate evaluation of treatments. Therefore, the United States and the European Pediatric Formulation Initiative have recommended applying nanotechnology-based delivery systems to tackle some of these challenges, particularly applying inorganic, polymeric, and lipid-based nanoparticles. Connected with these, adv

Gut microbiota shapes cancer immunotherapy responses.

The gut microbiota significantly influences cancer immunotherapy efficacy by modulating immune responses, remodeling the tumor microenvironment (TME), and producing key metabolites. Strategies such as FMT, probiotics, and dietary interventions show promise in enhancing responses to ICIs and ACTs while reducing immune-related adverse events (irAEs). This review summarizes clinical and preclinical findings and discusses microbiota-based interventions and future directions for precision immunotherapy.

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… Species within Firmicutes, particularly Clostridium, convert primary bile acids into secondary bile acids such as lithocholic acid (LCA) and deoxycholic acid (DCA) 161 . …

RESEARCH COMMUNICATIONS OF THE 34th ECVIM-CA CONGRESS.

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Small molecule metabolites: discovery of biomarkers and therapeutic targets.

Metabolic abnormalities lead to the dysfunction of metabolic pathways and metabolite accumulation or deficiency which is well-recognized hallmarks of diseases. Metabolite signatures that have close proximity to subject's phenotypic informative dimension, are useful for predicting diagnosis and prognosis of diseases as well as monitoring treatments. The lack of early biomarkers could lead to poor diagnosis and serious outcomes. Therefore, noninvasive diagnosis and monitoring methods with high specificity and selectivity are desperately needed. Small molecule metabolites-based metabolomics has b

Current advance of nanotechnology in diagnosis and treatment for malignant tumors.

Cancer remains a significant risk to human health. Nanomedicine is a new multidisciplinary field that is garnering a lot of interest and investigation. Nanomedicine shows great potential for cancer diagnosis and treatment. Specifically engineered nanoparticles can be employed as contrast agents in cancer diagnostics to enable high sensitivity and high-resolution tumor detection by imaging examinations. Novel approaches for tumor labeling and detection are also made possible by the use of nanoprobes and nanobiosensors. The achievement of targeted medication delivery in cancer therapy can be acc

UEG Week 2017 Oral Presentations

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2020 ACVIM Forum On Demand Research Abstract Program.

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Неделя ГЭЭ 2017 Презентации на плакате

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