How to say "upregulate" in Mandarin
上调 is the most common equivalent. In your description you are using the wrong character (凋, the radical is different).



EDIT: to add credibility to my answer and provide some examples, I have added some use cases.

Some usages in abstracts: 

--

School of Life Sciences, Peking University: 

上调巨噬细胞的一些信号分子 

"upregulating some signaling molecules of macrophages" (text at the end of the article)



Chinese Journal of Biochemistry and Molecular Biology: 

骨形态发生蛋白2通过Smad途径上调Osterix的表达 

"Bone Morphogenetic Protein 2 Upregulates Osterix Expression Through Smad Pathway"



Same source: 

BPH-1通过分泌PGE2上调前列腺间质细胞ERRα的表达 

"Prostaglandin E2 Mediates the Upregulation of ERRα Expression with BPH-1 Condition Media in Prostatic Stromal Cells "
(You can find many other use cases in this journal.) 



Journal of Shanghai Jiaotong University (Medical Science Edition): 

IL-21上调IL-17的表达在Graves病中的意义 

"Significance of IL-17 upregulation by IL-21 in patients with Graves disease"



调 is the keyword that denotes regulation, thus:

regulatory mechanism is 调控机制 (see Chinese abstract on the linked page) in this context.  

下调 (downregulation) denotes the opposite of 上调 (upregulation).  

It also comes as 调节 which is to regulate in a general sense (whether up or down, not specified), used in the context of biochemistry.