结果显示，组成型 Mcl 1 基因缺失的小鼠在出生后毛发发育正常，但随后逐渐出现毛发脱落，毛囊干细胞也逐渐消失；诱导型 Mcl 1 基因缺失的小鼠在成年后，急性缺失 Mcl 1 会导致激活的毛囊干细胞迅速耗尽，完全阻断脱毛诱导的毛发再生，而静止的毛囊干细胞则不受影响。

An MCL injury is commonly caused by a blow to the outside of the knee joint that pushes the knee inward toward the other one ...

Inner knee pain may result from a strain, sprain, or tear in the medial collateral ligament (MCL). ... Hold this stretch for 10 seconds, then repeat to stretch the other leg.

What do you need to know about an MCL sprain, ... Grade 2 or Grade 3, based on the severity or stretch and tearing of the ligament fibers. "Grade 1, there is minimal swelling.

Love has an MCL sprain, which is defined as a stretch, partial tear or complete tear of the medial collateral ligament on the outside part of the knee.

Green Packers QB Jordan Love has reportedly suffered an medial collateral ligament sprain in his knee. That type of MCL tear means he'll probably return in 3-6 weeks.