A new study suggests that the timing of a wound affects the speed at which it heals.
Wounds suffered during the day heal around 60 percent faster than those sustained at night.
The study showed how the body's circadian rhythm controlled the healing of wounds. The circadian rhythm is like a clock or timer. It tells our bodies when to wake up, eat and sleep in a cycle -- a series of activities that repeat themselves day after day. Each cycle lasts about 24 hours.
In the study, researchers found that skin cells moved faster to repair wounds sustained during the day. Their findings were published in the journal Science Translational Medicine.
The researchers examined cells, mice, and burn injury databases. Specifically, their investigation found the following information: Night-time burns - burns suffered between 8 o'clock at night and 8 o'clock the next morning - were 95 percent healed after an average of 28 days.
But after an average of 17 days, daytime burns - burns sustained between 8 o'clock in the morning and 8 at night – were 95 percent healed.
In other words, nighttime injuries took an average of 11 days longer to heal.
The scientists say that circadian clocks play an important part in healing. Circadian clocks control many cells in the body and affect many biological processes, including sleeping.
John O'Neill was a co-leader of the study. This is the first time that the circadian clock within individual cells has been shown to determine how effectively they respond to injuries, he said.
O'Neill added We consistently see about a two-fold difference in wound healing speed between the body clock's day and night. It may be that our bodies have evolved to heal fastest during the day when injuries are more likely to occur.
Wounds are very costly to treat. Worldwide, billions of dollars are spent every year on wound-treatment services. In Britain's National Health Services, for example, such services cost around $6.56 billion per year. Experts says the high costs result, in part, from a lack of drugs that speed up the closure of wounds.
The findings, if confirmed by other studies, could have important implications for surgical operations and wound-healing medicines.
John Blaikley works at Britain's University of Manchester. He said the new study's findings could help scientists develop better drugs. The findings, he added, could also help doctors understand the best time of day to do a surgery or give medicine.
I'm John Russell.
1.circadian rhythm 生物节律
"Our circadian rhythm wants us to sleep at night," she said.
2.day after day 日复一日
In our house, at the time, a cascade of musical emotion was gushing forth day after day, hour after hour, its scattered spray reflecting into our being a whole gamut of rainbow colours.
3.result from... 由……造成
Her blindness of both eyes resulted from a traffic accident.
4.in other words 换句话说
In other words, you may not be sure what to do next in this predicament.
5.Wounds suffered during the day heal around 60 percent faster than those sustained at night.
at night 在晚上，在夜晚
We will transit the strait at night.
He entered the church alone at night.
6.It tells our bodies when to wake up, eat and sleep in a cycle –
wake up 醒来，苏醒
Wake up and dress, now!
You can go to bed with one view and wake up with another.
该研究表明，生理节律控制着伤口的愈合情况 。生理节律就像时钟或者定时器一类的东西，可以周期性地告诉机体何时醒来、吃饭、睡觉——这是我们日复一日重复进行的一系列活动 。每个周期大约持续24小时 。
该研究的工作人员发现，对于白天所受的伤口，皮肤细胞的移动速度会更快，来修复这些伤口 。他们的发现成果发表在了《科学转化医学》期刊上 。
他们检验了细胞、老鼠、烧伤的数据库 。他们发现了如下精确信息：夜间烧伤——晚8点-次日早8点——通常需要28天的时间才可以达到95%的伤口愈合程度 。
科学家表示，生物钟对愈合起着关键性作用 。生物钟控制着机体的许多细胞，并影响着很多生化过程，包括睡觉 。
约翰 奥尼尔是该研究的领头人之一 。他表示，这是个体细胞内的生物钟第一次展现出他们如何影响伤口的愈合 。
治疗伤口的成本高昂 。每年全球有数十亿美元是花在治疗伤口的服务商 。比如，英国的国民保健服务治疗伤口的成本大概是65.6亿美元/年 。专家表示，成本高的部分原因是缺乏加速愈合伤口的药物 。
约翰是英国曼彻斯特大学的工作人员 。他表示，这项新研究的发现成果可能会帮助科学家研发更好的药物 。他补充道，这些发现成果还可能帮助医生掌握做外科手术或者用药的最好时段 。
John Russell为您播报 。