scholarly journals Polyphenols—Gut Microbiota Interrelationship: A Transition to a New Generation of Prebiotics

Nutrients ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 137
Author(s):  
Diana Plamada ◽  
Dan Cristian Vodnar
Keyword(s):  
Secondary Metabolites ◽  
Gut Microbiota ◽  
Clinical Studies ◽  
Present Review ◽  
Preclinical Studies ◽  
Beneficial Bacteria ◽  
Intestinal Microbes ◽  
Plant Kingdom ◽  
Preclinical And Clinical Studies ◽  
New Generation

The present review summarizes the studies carried out on this topic in the last five years. According to the new definitions, among all the compounds included in the group of prebiotics, polyphenols are probably the most important secondary metabolites produced by the plant kingdom. Many of these types of polyphenols have low bioavailability, therefore reaching the colon in unaltered form. Once in the colon, these compounds interact with the intestinal microbes bidirectionally by modulating them and, consequently, releasing metabolites. Despite much research on various metabolites, little is known about the chemistry of the metabolic routes used by different bacteria species. In this context, this review aims to investigate the prebiotic effect of polyphenols in preclinical and clinical studies, highlighting that the consumption of polyphenols leads to an increase in beneficial bacteria, as well as an increase in the production of valuable metabolites. In conclusion, there is much evidence in preclinical studies supporting the prebiotic effect of polyphenols, but further clinical studies are needed to investigate this effect in humans.

scholarly journals Generalized data of criteria of risk factors for the use of the drug torasemide from the materials of its preclinical studies

2020 ◽  
Author(s):  
Natalia A. Anisimova ◽  
Natalia O. Selizarova ◽  
Grigory A. Plisko ◽  
Evgeny D. Semivelichenko ◽  
Svetlana M. Napalkova
Keyword(s):  
Risk Factors ◽  
Arterial Hypertension ◽  
Clinical Studies ◽  
Generic Drugs ◽  
Preclinical Studies ◽  
Efficacy And Safety ◽  
Cardiovascular Pathology ◽  
Pharmacological Studies ◽  
Search For Information ◽  
Preclinical And Clinical Studies

This study presents the review and analysis of materials, the summary of the data on the results of experimental (preclinical) pharmacological studies of the drug Torasemide and the results of clinical studies of the original drug Demadex, based on risk factors influencing the outcomes of hypertension in people. The information on the efficacy and safety of the drugs based on Torasemide is also presented in the relevant sections of the article. The search for information sources for the review was carried out using domestic and international databases elibrary and PubMed, applying contextual queries, including international non-proprietary names, terms of preclinical studies of pharmacokinetics, pharmacodynamics, and animal species used. This review considers the aspects of safety, pharmacokinetics, primary and secondary pharmacodynamics of Torasemide, available in various sources describing its preclinical studies. The summarized data presented in the study, in our opinion, may be used by researchers who are engaged in preclinical and clinical studies, as well as the issues of studying the efficacy and safety of generic drugs used in the treatment of patients with arterial hypertension and other cardiovascular pathology. The information on the advantages of Torasemide in comparison with Furosemide in the treatment of animals with simulated arterial hypertension deserves special consideration.

scholarly journals The Challenges and Effects of Ascorbic Acid Treatment of Acute Pancreatitis: A Systematic Review and Meta-Analysis of Preclinical and Clinical Studies

2021 ◽  
Vol 8 ◽  
Author(s):  
Lin Gao ◽  
Eric Chong ◽  
Sayali Pendharkar ◽  
Anthony Phillips ◽  
Lu Ke ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Acute Pancreatitis ◽  
Ascorbic Acid ◽  
Organ Failure ◽  
Clinical Studies ◽  
Primary Outcome ◽  
Meta Analysis ◽  
Length Of Hospital Stay ◽  
Preclinical Studies ◽  
Preclinical And Clinical Studies

Background: Oxidative stress has been implicated in the pathogenesis of acute pancreatitis (AP), and ascorbic acid (AA), as an important endogenous antioxidant substance, has been shown to reduce AP severity in preclinical studies. However, the effects of AA supplementation in clinical settings remain controversial.Methods: PubMed, EMBASE, MEDLINE, and SCOPUS databases were searched, and both preclinical and clinical studies were included. For clinical trials, the primary outcome was incidence of organ failure, and for preclinical studies, the primary outcome was histopathological scores of pancreatic injuries.Results: Meta-analysis of clinical trials showed that compared with controls, AA administration did not reduce the incidence of organ failure or mortality during hospitalization but was associated with significantly reduced length of hospital stay. Meta-analysis of preclinical studies showed that AA supplementation reduced pancreatic injury, demonstrated as decreased histological scores and serum amylase, lipase levels.Conclusion: AA administration has no effect on survival or organ failure in patients with AP but may reduce the length of hospital stay. However, the evidence to date remains sparse, scattered, and of suboptimal quality, making it difficult to draw any firm conclusion on the clinical benefits of AA in AP.

scholarly journals Gut microbiota regulate astrocytic functions in the brain: possible therapeutic consequences

2021 ◽  
Vol 19 ◽  
Author(s):  
Ya-Fei Zhao ◽  
Da-Neng Wei ◽  
Yong Tang
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Gut Microbiota ◽  
Clinical Studies ◽  
Brain Diseases ◽  
Psychiatric Diseases ◽  
Therapeutic Consequences ◽  
The Central Nervous System ◽  
Preclinical And Clinical Studies ◽  
The Brain

: Astrocytes are essential for maintaining the homeostasis of the central nervous system (CNS). Astrocytic dysfunction has been implicated in the progression of several neurodegenerative and psychiatric diseases; however, a multitude of factors and signals influencing astrocytic activity have not been entirely elucidated. Astrocytes respond to local signals from the brain, but are also indirectly modulated by gut microbiota. Previous studies revealed that most of the CNS diseases triggered by astrocytic dysfunction are closely associated with the dysbiosis of gut microbiome. Emerging data from preclinical and clinical studies suggest that maturation and functioning of astrocytes rely on gut microbiota, which plays a pivotal role in the decrease of astrocytic activation and may alleviate symptoms of brain diseases. Herein, we discuss the most recent advances concerning the complex connections between astrocytes and gut microbiota, which are involved in the immune, neurotransmission and neuroendocrine pathways. Deciphering these pathways will facilitate a better understanding of how perturbed gut microbiota contributes to the dysfunction of astrocytes and open therapeutic opportunities for the treatment of brain diseases.

scholarly journals Bifidobacterium longum Subspecies infantis (B. infantis) in Pediatric Nutrition: Current State of Knowledge

Nutrients ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1581
Author(s):  
Maciej Chichlowski ◽  
Neil Shah ◽  
Jennifer L. Wampler ◽  
Steven S. Wu ◽  
Jon A. Vanderhoof
Keyword(s):  
Gut Microbiota ◽  
Clinical Studies ◽  
Infant Health ◽  
Bifidobacterium Longum ◽  
Intestinal Barrier ◽  
Intestinal Barrier Function ◽  
Breastfed Infants ◽  
Pediatric Nutrition ◽  
Preclinical And Clinical Studies ◽  
Bifidobacterium Longum Subspecies Infantis

Since originally isolated in 1899, the genus Bifidobacterium has been demonstrated to predominate in the gut microbiota of breastfed infants and to benefit the host by accelerating maturation of the immune response, balancing the immune system to suppress inflammation, improving intestinal barrier function, and increasing acetate production. In particular, Bifidobacterium longum subspecies infantis (B. infantis) is well adapted to the infant gut and has co-evolved with the mother-infant dyad and gut microbiome, in part due to its ability to consume complex carbohydrates found in human milk. B. infantis and its human host have a symbiotic relationship that protects the preterm or term neonate and nourishes a healthy gut microbiota prior to weaning. To provide benefits associated with B. infantis to all infants, a number of commercialized strains have been developed over the past decades. As new ingredients become available, safety and suitability must be assessed in preclinical and clinical studies. Consideration of the full clinical evidence for B. infantis use in pediatric nutrition is critical to better understand its potential impacts on infant health and development. Herein we summarize the recent clinical studies utilizing select strains of commercialized B. infantis.

scholarly journals Repurposing of Metformin as a Multifaceted and Multitasking Preventative and Treatment for Cancer

2021 ◽  
Author(s):  
Raymond Chang
Keyword(s):  
Diabetes Mellitus ◽  
Clinical Studies ◽  
Mechanisms Of Action ◽  
Cancer Development ◽  
Molecular Pathways ◽  
Preclinical Studies ◽  
Treatment Of Diabetes ◽  
Meta Analyses ◽  
Preclinical And Clinical Studies ◽  
Risk Of Cancer

Metformin is a cornerstone treatment of diabetes mellitus. Since 2005 when it has been first reported to reduce the risk of cancer in diabetics, a large number of preclinical and clinical studies have implicated its potential role as a preventative and adjunct therapy for a broad range of cancers. Whereas preclinical studies demonstrate its actions on a multitude of molecular pathways involving nearly all aspects of cancer development including metabolism, angiogenesis, apoptosis, autophagy, immunity, epigenetics, inflammation and crosstalk with the microbiome, other studies demonstrate its synergism with a range of anticancer modalities including chemotherapy, radiotherapy, immunotherapy, and targeted therapies. Furthermore, an increasing number of clinical studies not only confirm its preventative properties against cancers but have extended its potential for a possible adjunctive role in the neoadjuvant, adjuvant, maintenance and salvage therapies of cancer. This article intends to summarize the basic science that allows us to understand the complex multiple mechanisms of action of this remarkable multitasking molecule as well as review the recent meta-analyses that have summarized the clinical studies assessing the therapeutic efficacy of metformin for various cancers.

scholarly journals Platelet-Rich Plasma for Bone Fracture Treatment: A Systematic Review of Current Evidence in Preclinical and Clinical Studies

2021 ◽  
Vol 8 ◽  
Author(s):  
Yangming Zhang ◽  
Fei Xing ◽  
Rong Luo ◽  
Xin Duan
Keyword(s):  
Systematic Review ◽  
Bone Fracture ◽  
Clinical Studies ◽  
Platelet Rich Plasma ◽  
Fracture Treatment ◽  
Preclinical Studies ◽  
Preclinical And Clinical Studies ◽  
Positive Effect ◽  
Present Systematic Review

Background: Recently, there is an increasing interest in the therapeutic potential of platelet-rich plasma (PRP) for bone fracture treatment. Nevertheless, the effect of PRP for bone fracture treatment remains controversial and is still a matter of discussion. Therefore, we performed a systematic review to evaluate the efficacy and safety of PRP injection for treatment of bone fracture.Methods: The main bibliographic databases, including Medline, PubMed, Embase, Web of Science, and the Cochrane library, were comprehensively searched for studies focusing on the application of platelet-rich plasma (PRP) on bone fracture treatment. All relevant articles were screened for eligibility and subdivided into the preclinical and clinical studies. Data were extracted and presented systematically.Results: Finally, twenty-six in vitro preclinical studies (basic studies), nine in vivo preclinical studies (animal studies), and nine clinical studies, met the selection criteria, and were included in the present systematic review. Preclinical studies showed an overall positive effect of PRP on osteoblast-like cells in vitro and bone healing in animal models. The most used treatment for bone fracture in animal and clinical studies is fixation surgery combined with PRP injection. The clinical studies reported PRP shortened bony healing duration, and had no positive effect on improving the healing rate of closed fractures. However, the results of functional outcomes are controversial. Additionally, compared with control group, PRP would not increase the rate of postoperative wound infection.Conclusion: The present systematic review confirmed the continuing interests of PRP as an additional treatment for bone fracture. Preclinical studies highlighted the potential value of PRP as promising therapy for bone fracture. However, the preclinical evidence did not translate into a similar result in the clinical studies. In addition, types of fractures and procedures of PRP preparation are heterogeneous in enrolled studies, which might result in controversial results. Meanwhile, characteristics of PRP, such as platelet concentration, the numbers of leukocytes, still need to be determined and further research is required.

EXPRESS: Therapeutic Hypothermia for Intracerebral Hemorrhage: Systematic Review and Meta-Analysis of the Experimental and Clinical Literature

2021 ◽  
pp. 174749302110448
Author(s):  
Turner Baker ◽  
John Durbin ◽  
Zachary Troiani ◽  
Luis Ascanio-Cortez ◽  
Rebecca Baron ◽  
...  
Keyword(s):  
Systematic Review ◽  
Intracerebral Hemorrhage ◽  
Therapeutic Hypothermia ◽  
Cerebral Edema ◽  
Clinical Studies ◽  
Meta Analysis ◽  
Tissue Loss ◽  
Hematoma Expansion ◽  
Preclinical Studies ◽  
Preclinical And Clinical Studies

Background Intracerebral hemorrhage (ICH) remains the deadliest form of stroke worldwide, inducing neuronal death through a wide variety of pathways. Therapeutic hypothermia (TH) is a robust and well studied neuroprotectant widely used across a variety of specialties. Aims This review summarizes results from preclinical and clinical studies to highlight the overall effectiveness of TH to improve long-term ICH outcomes while also elucidating optimal protocol regimens to maximize therapeutic effect. Summary of Review A systematic review was conducted across three databases to identify trials investigating the use of TH to treat ICH. A random-effects meta-analysis was conducted on preclinical studies, looking at neurobehavioral outcomes, blood brain barrier breakdown (BBB), cerebral edema, hematoma volume, and tissue loss. Several mixed-methods meta-regression models were also performed to adjust for variance and variations in hypothermia induction procedures. 21 preclinical studies and 5 human studies were identified. The meta-analysis of preclinical studies demonstrated a significant benefit in behavioral scores (ES=-0.43, p=0.02), cerebral edema (ES=1.32, p=0.0001), and BBB (ES=2.73, p=<0.00001). TH was not found to significantly affect hematoma expansion (ES=-0.24, p=0.12) or tissue loss (ES=0.06, p=0.68). Clinical study outcome reporting was heterogeneous, however there was recurring evidence of TH-induced edema reduction. Conclusions The combined preclinical evidence demonstrates that TH reduced multiple cell death mechanisms initiated by ICH, yet there is no definitive evidence in clinical studies. The cooling strategies employed in both preclinical and clinical studies were highly diverse, and focused refinement of cooling protocols should be developed in future preclinical studies. The current data for TH in ICH remains questionable despite the highly promising indications in preclinical studies. Definitive randomized controlled studies are still required to answer this therapeutic question.

scholarly journals Obesity and stroke: Can we translate from rodents to patients?

2016 ◽  
Vol 36 (12) ◽  
pp. 2007-2021 ◽  
Author(s):  
Michael J Haley ◽  
Catherine B Lawrence
Keyword(s):  
Clinical Studies ◽  
Stroke Risk ◽  
Obesity Paradox ◽  
Preclinical Studies ◽  
Stroke Outcome ◽  
C Reactive Protein ◽  
Mortality And Morbidity ◽  
Reactive Protein ◽  
Ischaemic Damage ◽  
Preclinical And Clinical Studies

Obesity is a risk factor for stroke and is consequently one of the most common co-morbidities found in patients. There is therefore an identified need to model co-morbidities preclinically to allow better translation from bench to bedside. In preclinical studies, both diet-induced and genetically obese rodents have worse stroke outcome, characterised by increased ischaemic damage and an altered inflammatory response. However, clinical studies have reported an ‘obesity paradox’ in stroke, characterised by reduced mortality and morbidity in obese patients. We discuss the potential reasons why the preclinical and clinical studies may not agree, and review the mechanisms identified in preclinical studies through which obesity may affects stroke outcome. We suggest inflammation plays a central role in this relationship, as obesity features increases in inflammatory mediators such as C-reactive protein and interleukin-6, and chronic inflammation has been linked to worse stroke risk and outcome.

scholarly journals Effects of Andrographolide on Mouse Intestinal Microflora Based on High-Throughput Sequence Analysis

2021 ◽  
Vol 8 ◽  
Author(s):  
Haigang Wu ◽  
Xian Wu ◽  
Li Huang ◽  
Chongmei Ruan ◽  
Jinni Liu ◽  
...  
Keyword(s):  
Microbial Community ◽  
Gut Microbiota ◽  
High Throughput ◽  
High Throughput Sequencing ◽  
Bacterial Resistance ◽  
Microbial Community Composition ◽  
Intestinal Flora ◽  
Sequencing Analysis ◽  
Beneficial Bacteria ◽  
Intestinal Microbes

The intestinal flora is a micro-ecosystem that is closely linked to the overall health of the host. We examined the diversity and abundance of intestinal microorganisms in mice following the administration of andrographolide, a component of the Chinese medical herb Andrographis paniculata. Administration of andrographolide produces multiple beneficial effects including anti-inflammatory, antiviral and antibacterial effects but whether it directly influences the gut microbiota is not known. This study investigated whether the oral administration of andrographolide influences the intestinal microbiota and was compared with amoxicillin treatment as a positive control and water only as a negative control. We examined 21 cecal samples and conducted a high-throughput sequencing analysis based on V3-V4 variable region of the 16S rDNA genes. We found that the diversity and abundance of mouse gut microbiota decreased in direct proportion with the amoxicillin dose whereas andrographolide administration did not affect intestinal microbial community structure. The composition of intestinal microbes following andrographolide treatment was dominated by the Firmicutes while Bacteroidetes dominated the amoxicillin treatment group compared with the negative controls. Specifically, the f__Lachnospiraceae_ Unclassified, Lachnospiraceae_ NK4A136_group and Ruminococcaceae_ UCG-014 were enriched with andrographolide administration while Bacteroides, Klebsiella and Escherichia-Shigella significantly increased in the amoxicillin test groups. Amoxicillin administration altered the microbial community composition and structure by increasing the proportion of pathogenic to beneficial bacteria whereas andrographolide administration led to increases in the proportions and abundance of beneficial bacteria. This study provides a theoretical basis for finding alternatives to antibiotics to decrease bacterial resistance and restore intestinal floral imbalances.

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