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Pathobiology : Journal of... 2021Oral microbiota are among the most diverse in the human body. More than 700 species have been identified in the mouth, and new sequencing methods are allowing us to... (Review)
Review
Oral microbiota are among the most diverse in the human body. More than 700 species have been identified in the mouth, and new sequencing methods are allowing us to discover even more species. The anatomy of the oral cavity is different from that of other body sites. The oral cavity has mucosal surfaces (the tongue, the buccal mucosa, the gingiva, and the palate), hard tissues (the teeth), and exocrine gland tissue (major and minor salivary glands), all of which present unique features for microbiota composition. The connection between oral microbiota and diseases of the human body has been under intensive research in the past years. Furthermore, oral microbiota have been associated with cancer development. Patients suffering from periodontitis, a common advanced gingival disease caused by bacterial dysbiosis, have a 2-5 times higher risk of acquiring any cancer compared to healthy individuals. Some oral taxa, especially Porphyromonas gingivalis and Fusobacterium nucleatum, have been shown to have carcinogenic potential by several different mechanisms. They can inhibit apoptosis, activate cell proliferation, promote cellular invasion, induce chronic inflammation, and directly produce carcinogens. These microbiota changes can already be seen with potentially malignant lesions of the oral cavity. The causal relationship between microbiota and cancer is complex. It is difficult to accurately study the impact of specific bacteria on carcinoma development in humans. This review focuses on the elucidating the interactions between oral cavity bacterial microbiota and cancer. We gather literature on the current knowledge of the bacterial contribution to cancer development and the mechanisms behind it.
Topics: Animals; Carcinogenesis; Inflammation; Mice; Microbiota; Mouth; Neoplasms; Periodontitis
PubMed: 33176328
DOI: 10.1159/000510979 -
Journal of Clinical Medicine Feb 2023The number of systematic reviews (SR) summarizing the literature regarding the clinical effects of Dry Needling (DN) has increased rapidly. Yet, rigorous evidence about... (Review)
Review
The number of systematic reviews (SR) summarizing the literature regarding the clinical effects of Dry Needling (DN) has increased rapidly. Yet, rigorous evidence about the clinical effectiveness of this technique is still lacking. The aim of this umbrella review is to summarize the evidence about the clinical effects of trigger point DN on musculoskeletal disorders across all body regions. PubMed, Web of Science and Embase were searched to identify SRs examining the effect of DN (as a stand-alone intervention or combined with another treatment modality) compared to sham/no intervention or a physical therapy (PT) intervention with at least one clinical outcome in the domain of pain or physical functioning. Risk of bias (RoB) was assessed with the AMSTAR-2 tool. Quantification of the overlap in primary studies was calculated using the corrected covered area (CCA). The electronic search yielded 2286 results, of which 36 SRs were included in this review. Overall, DN is superior to sham/no intervention and equally effective to other interventions for pain reduction at short-term regardless of the body region. Some SRs favored wet needling (WN) over DN for short-term pain reductions. Results on physical functioning outcomes were contradictory across body regions. Limited data is available for mid- and long-term effects. DN has a short-term analgesic effect in all body regions and may be of additional value to the interventions that are used to date in clinical practice. Several studies have shown an additional treatment effect when combining DN to physiotherapeutic interventions compared to these interventions in isolation. There is a substantial need for the standardization of DN protocols to address the problem of heterogeneity and to strengthen the current evidence.
PubMed: 36769852
DOI: 10.3390/jcm12031205 -
International Journal of Hyperthermia :... 2023The heating characteristics of water-filtered infrared-A (wIRA) radiation were investigated in two body regions of healthy humans according to the quality standards of...
PURPOSE
The heating characteristics of water-filtered infrared-A (wIRA) radiation were investigated in two body regions of healthy humans according to the quality standards of the European Society for Hyperthermic Oncology (ESHO) using an irradiance (infrared-A) of 146 W m as recommended for clinical superficial hyperthermia (HT).
METHODS
wIRA was applied to the abdominal wall and lumbar region for 60 min. Skin surface temperature was limited to ≤43 °C. Tissue temperatures were measured invasively at 1-min intervals before, during and after wIRA exposure using five fiber-optical probes at depths of 1-20 mm.
RESULTS
Significant differences between body regions occurred during the heating-up phase at depths of 5-15 mm. Thermal steady states were reached at depths ≤5 mm after exposures of 5-6 min, and ≤20 mm after 20 min. On average, the minimum requirements of ESHO were exceeded in both regions by the following factors: ≈3 for the heating rate, ≈2 for the specific absorption rate and ≈1.4 for the temperature rise. Tissue depths with ≥ 40 °C and > 41 °C were ≤10 mm, and ≤20 mm for ≤ 43 °C. The temperature decay time after termination of irradiation was 1-5 min. Corresponding temperatures were ≤42.2 °C for CEM and ≤41.8 °C for CEM, i.e., they are inadequate for direct thermal cell killing.
CONCLUSIONS
Thermography-controlled wIRA-HT complies with the ESHO criteria for superficial HT as a radiosensitizer and avoids the risk of thermal skin toxicity.
Topics: Humans; Heating; Hyperthermia; Hyperthermia, Induced; Abdominal Wall
PubMed: 37592457
DOI: 10.1080/02656736.2023.2244208 -
Proceedings of the National Academy of... Oct 2023The immune system is a complex network of cells with critical functions in health and disease. However, a comprehensive census of the cells comprising the immune system...
The immune system is a complex network of cells with critical functions in health and disease. However, a comprehensive census of the cells comprising the immune system is lacking. Here, we estimated the abundance of the primary immune cell types throughout all tissues in the human body. We conducted a literature survey and integrated data from multiplexed imaging and methylome-based deconvolution. We also considered cellular mass to determine the distribution of immune cells in terms of both number and total mass. Our results indicate that the immune system of a reference 73 kg man consists of 1.8 × 10 cells (95% CI 1.5-2.3 × 10), weighing 1.2 kg (95% CI 0.8-1.9). Lymphocytes constitute 40% of the total number of immune cells and 15% of the mass and are mainly located in the lymph nodes and spleen. Neutrophils account for similar proportions of both the number and total mass of immune cells, with most neutrophils residing in the bone marrow. Macrophages, present in most tissues, account for 10% of immune cells but contribute nearly 50% of the total cellular mass due to their large size. The quantification of immune cells within the human body presented here can serve to understand the immune function better and facilitate quantitative modeling of this vital system.
Topics: Male; Humans; Human Body; Lymphocytes; Lymph Nodes; Spleen; Macrophages
PubMed: 37871201
DOI: 10.1073/pnas.2308511120 -
Revue de L'infirmiere 2020Consciousness and the body. Life is expressed in the body through physical, chemical and biological processes as well as through the emergence of immaterial dimensions...
Consciousness and the body. Life is expressed in the body through physical, chemical and biological processes as well as through the emergence of immaterial dimensions such as consciousness and subjectivity. These material and immaterial dimensions, connected and interdependent, form the basis of our humanity and should be considered together in the case of a global and personalised approach to the care practice.
Topics: Consciousness; Human Body; Humans
PubMed: 32993903
DOI: 10.1016/S1293-8505(20)30238-4 -
Angewandte Chemie (International Ed. in... Aug 2022Odorants are relatively small molecules which are easily taken up and distributed in the human body. Despite their relevance in everyday life, however, only a limited... (Review)
Review
Odorants are relatively small molecules which are easily taken up and distributed in the human body. Despite their relevance in everyday life, however, only a limited amount of evidence about their metabolism, pathways, and bioactivities in the human body exists. With this Review, we aim to encourage future interdisciplinary research on the function and mechanisms of the biotransformation of odorants, involving different disciplines such as nutrition, medicine, biochemistry, chemistry, and sensory sciences. Starting with a general overview of the different ways of odorant uptake and enzymes involved in the metabolism of odorants, a more precise description of biotransformation processes and their function in the oral cavity, the nose, the lower respiratory tract (LRT), and the gastrointestinal tract (GIT) is given together with an overview of the different routes of odorant excretion. Finally, perspectives for future research are discussed.
Topics: Biological Transport; Humans; Mouth; Odorants; Receptors, Odorant; Smell
PubMed: 35522818
DOI: 10.1002/anie.202202866 -
Nutrients Sep 2023In recent years, the consumption of energy drinks by young adults and athletes has risen significantly, but concerns have been raised about the potential health risks... (Review)
Review
In recent years, the consumption of energy drinks by young adults and athletes has risen significantly, but concerns have been raised about the potential health risks associated with excessive consumption. These concerns include cardiovascular problems, nervous system disorders, and the potential for addiction. This review aims to examine the reported effects of acute or chronic abuse of energy drinks on human health. The analysis shows a significant prevalence of adverse effects, particularly on the cardiovascular and neurovegetative systems. In particular, the analysis identified nine cases of cardiac arrest, three of which were fatal. The aetiology of these adverse effects is attributed to the inherent neurostimulant properties of these beverages, of which caffeine is the predominant component. A comparison of documented effects in humans with experimental studies in animal models showed an overlap in results. This review highlights the need for greater rigour in the assessment of sudden cardiac death, particularly in young people, as legal substances such as energy drinks may be involved. We propose stricter limits on the consumption of these beverages than for caffeine, based on the evidence found and the data in the literature. This review also calls for the establishment of regulations governing the consumption of these products in view of their potential impact on human health.
Topics: Animals; Young Adult; Humans; Adolescent; Energy Drinks; Human Body; Caffeine; Drug-Related Side Effects and Adverse Reactions; Athletes
PubMed: 37764707
DOI: 10.3390/nu15183922 -
Acta Clinica Croatica Jun 2019The whole human body receives rich sensory innervation with only one exception and that is the brain tissue. The orofacial region is hence no exception. The head region... (Review)
Review
The whole human body receives rich sensory innervation with only one exception and that is the brain tissue. The orofacial region is hence no exception. The head region consequently receives a rich network of sensory nerves making it special because the two types of sensory fibres, visceral and somatic overlap, especially in the pharynx. Also, different pain syndromes that affect this region are rather specific in comparison to their presentation in other body regions. With this review article we wanted to show the detailed anatomy of the peripheral sensory pathways, because of its importance in everyday body functions (eating, drinking, speech) as well as the importance it has in pathological conditions (pain syndromes), in diagnostics and regional analgesia and anaesthesia.
Topics: Afferent Pathways; Face; Glossopharyngeal Nerve; Humans; Muscle, Skeletal; Pain; Pharynx; Trigeminal Nerve; Vagus Nerve
PubMed: 31741557
DOI: 10.20471/acc.2019.58.s1.05 -
The Journal of Craniofacial SurgeryEpidermoid and dermoid cysts are benign developmental anomalies that can form anywhere in the body. Despite the rarity of incidence in the head and neck, they can arise... (Review)
Review
BACKGROUND
Epidermoid and dermoid cysts are benign developmental anomalies that can form anywhere in the body. Despite the rarity of incidence in the head and neck, they can arise at a variety of craniofacial locations. The purpose of this study was to analyze the clinical features of epidermoid and dermoid cysts arising in the craniofacial region with a literature review.
METHODS
A retrospective study was designed, and clinical features and surgical considerations were investigated from a literature review. Cases of epidermoid cysts in the scalp, temporal area, glabellar area, mouth floor, and buccal mucosa were described.
RESULTS
Dermoid cysts in more lateral regions of the scalp are rarely associated with intracranial extension. Because temporal dermoid cysts have a high rate of intracranial extension, radiological evaluation of the lesions in the temporal area is imperative. Epidermoid cysts in the glabellar area are usually superficial. Consideration of the surgical approach for an epidermoid cyst of the mouth floor is important. Because epidermoid cysts in the buccal mucosa are extremely rare, differential diagnosis was emphasized. Epidermoid cysts in the scalp, in the temporal intradiploic area, on the glabellar area in the periorbital region, in the mouth floor, and in the buccal mucosa were surgically excised considering the depth and location. Ten cases of epidermoid cysts in the buccal mucosa were retrieved from the literature review.
CONCLUSIONS
Consideration of the anatomic locations of epidermoid and dermoid cysts in the craniofacial region might help facilitate accurate diagnosis and treatment.
Topics: Humans; Epidermal Cyst; Dermoid Cyst; Retrospective Studies; Face; Scalp
PubMed: 37487139
DOI: 10.1097/SCS.0000000000009561 -
Human Brain Mapping Sep 2021Recognising a person's identity often relies on face and body information, and is tolerant to changes in low-level visual input (e.g., viewpoint changes). Previous...
Recognising a person's identity often relies on face and body information, and is tolerant to changes in low-level visual input (e.g., viewpoint changes). Previous studies have suggested that face identity is disentangled from low-level visual input in the anterior face-responsive regions. It remains unclear which regions disentangle body identity from variations in viewpoint, and whether face and body identity are encoded separately or combined into a coherent person identity representation. We trained participants to recognise three identities, and then recorded their brain activity using fMRI while they viewed face and body images of these three identities from different viewpoints. Participants' task was to respond to either the stimulus identity or viewpoint. We found consistent decoding of body identity across viewpoint in the fusiform body area, right anterior temporal cortex, middle frontal gyrus and right insula. This finding demonstrates a similar function of fusiform and anterior temporal cortex for bodies as has previously been shown for faces, suggesting these regions may play a general role in extracting high-level identity information. Moreover, we could decode identity across fMRI activity evoked by faces and bodies in the early visual cortex, right inferior occipital cortex, right parahippocampal cortex and right superior parietal cortex, revealing a distributed network that encodes person identity abstractly. Lastly, identity decoding was consistently better when participants attended to identity, indicating that attention to identity enhances its neural representation. These results offer new insights into how the brain develops an abstract neural coding of person identity, shared by faces and bodies.
Topics: Adult; Brain Mapping; Cerebral Cortex; Face; Facial Recognition; Female; Human Body; Humans; Magnetic Resonance Imaging; Male; Middle Aged; Nerve Net; Pattern Recognition, Visual; Social Perception; Space Perception; Young Adult
PubMed: 34032361
DOI: 10.1002/hbm.25544