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return kwic search for system out of >500 occurrences
331253 occurrences (No.58 in the rank) during 5 years in the PubMed. [no cache] 500 found

10) Circadian disruptions (during ageing, shift work and jet-lag) have been proposed as a risk factor for degeneration and disease of tissues, including the musculoskeletal system.

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PMID:33397731 DOI:10.1136/annrheumdis-2020-219515

2021 Annals of the rheumatic diseases

* Tissue physiology revolving around the clock: circadian rhythms as exemplified by the intervertebral disc.

- Circadian clocks in the brain and peripheral tissues temporally coordinate local physiology to align with the 24 hours rhythmic environment through light/darkness, rest/activity and feeding/fasting cycles. Circadian disruptions (during ageing, shift work and jet-lag) have been proposed as a risk factor for degeneration and disease of tissues, including the musculoskeletal system. The intervertebral disc (IVD) in the spine separates the bony vertebrae and permits movement of the spinal column. IVD degeneration is highly prevalent among the ageing population and is a leading cause of lower back pain. The IVD is known to experience diurnal changes in loading patterns driven by the circadian rhythm in rest/activity cycles. In recent years, emerging evidence indicates the existence of molecular circadian clocks within the IVD, disruption to which accelerates tissue ageing and predispose animals to IVD degeneration. The cell-intrinsic circadian clocks in the IVD control key aspects of physiology and pathophysiology by rhythmically regulating the expression of ~3.5% of the IVD transcriptome, allowing cells to cope with the drastic biomechanical and chemical changes that occur throughout the day. Indeed, epidemiological studies on long-term shift workers have shown an increased incidence of lower back pain. In this review, we summarise recent findings of circadian rhythms in health and disease, with the IVD as an exemplar tissue system. We focus on rhythmic IVD functions and discuss implications of utilising biological timing mechanisms to improve tissue health and mitigate degeneration. These findings may have broader implications in chronic rheumatic conditions, given the recent findings of musculoskeletal circadian clocks.

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(1)71 null	(13)6 the	(25)3 incorporating	(37)2 being
(2)44 and	(14)6 which	(26)3 level	(38)2 but
(3)17 is	(15)5 has	(27)3 may	(39)2 devices
(4)17 to	(16)4 by	(28)3 using	(40)2 especially
(5)12 for	(17)4 should	(29)3 we	(41)2 genes
(6)12 in	(18)4 were	(30)2 (CNS),	(42)2 identified
(7)12 of	(19)4 with	(31)2 (ECS)	(43)2 including
(8)7 are	(20)3 as	(32)2 (GIS)	(44)2 it
(9)7 that	(21)3 barriers	(33)2 (SNS)	(45)2 levels
(10)7 was	(22)3 can	(34)2 Online	(46)2 remains
(11)6 (CNS)	(23)3 could	(35)2 acts	(47)2 seems
(12)6 group	(24)3 factors	(36)2 becomes	(48)2 throughout

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--- WordNet output for system --- =>制度組織体系的方式, システム, 組織, 整然とした手順, (思想などの)体系, 体制 Overview of noun system The noun system has 9 senses (first 8 from tagged texts) 1. (43) system -- (instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer") 2. (23) system, scheme -- (a group of independent but interrelated elements comprising a unified whole; "a vast system of production and distribution and consumption keep the country going") 3. (14) system -- ((physical chemistry) a sample of matter in which substances in different phases are in equilibrium; "in a static system oil cannot be replaced by water on a surface"; "a system generating hydrogen peroxide") 4. (10) system, system of rules -- (a complex of methods or rules governing behavior; "they have to operate under a system they oppose"; "that language has a complex system for indicating gender") 5. (8) arrangement, organization, organisation, system -- (an organized structure for arranging or classifying; "he changed the arrangement of the topics"; "the facts were familiar but it was in the organization of them that he was original"; "he tried to understand their system of classification") 6. (7) system -- (a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion") 7. (6) system -- (a procedure or process for obtaining an objective; "they had to devise a system that did not depend on cooperation") 8. (1) system -- (the living body considered as made up of interdependent components forming a unified whole; "exercise helped him get the alcohol out of his system") 9. organization, organisation, system -- (an ordered manner; orderliness by virtue of being methodical and well organized; "his compulsive organization was not an endearing quality"; "we can't do it unless we establish some system around here") --- WordNet end ---