在此補充舉報材料:美國麻省理工學院(MIT)的張曙光博士提供的,他實驗室的有關GPCR的最新論文(Qing et al., 2020)。該文圖5所示,截短的(非七重跨膜)受體不能介導25nM配體引起的細胞內鈣濃度升高。而“凌堃-裴鋼”論文(Ling et al., 1999)的圖3D聲稱五重跨膜受體可以與全長的正常受體一樣介導10nM的配體引起的細胞內鈣濃度升高。這兩種結果截然相反。
主題: Re: A letter to Dr. Rao Yi concerning your extremely careless accusation of Dr. 裴鋼 and colleagues' 1999 PNAS paper without familiarity with the literature
6)我們現在來仔細閱讀您作為通訊作者的大作:Qing R et al. (2020) Non-full-length water-soluble CXCR4QTY and CCR5QTY chemokine receptors: implication for overlooked truncated but functional membrane receptors. iScience 23:101670.
8)您的來信口口聲聲“Our data, and the work of others, directly support the conclusion by Ling et al in their 1999 PNAS paper. In fact, our work was carried out on the identical protein from totally different perspectives.”(翻譯為“我們的資料、以及其他人的工作,直接支持凌等1999年文章的結論。事實上,我們的工作從不同的角度研究了同樣的蛋白質”)。
您提供的參考文獻有些明確指出GPCR少于七重跨膜無傳遞信號作用(如您提供的Zhu X and Wess J (1998) Biochemistry 37:15773-15784; Trettel et al. (2003) Journal of Biological Chemistry 278:40980-8. doi: 10.1074/jbc.M306815200)。您以后應該有選擇,就不要堆砌這種支持七重跨膜重要性、不支持非七重跨膜蛋白有信號功能的文章。
Helen Wise于2012年發表的綜述,明確絕大多數非GPCRs都沒有轉導信號的功能,而且常常相反,不僅不能轉導信號、還能抑制信號轉導。極少數缺乏七重跨膜的GPCR有信號的結果的文章有兩個共性:一般只有一篇文章,而且來自一個實驗室,同一個實驗室沒有兩篇、不同實驗室也沒有互相驗證過。所以,這些極少有信號的文章,都缺乏公認。
10)在您這份郵件之前,我平生只在2004年左右收到過一封這樣口氣的郵件。因為我反對美國神經科學會邀請達賴喇嘛做演講,美國科學家有多種看法,有一位白人教授就是您這樣的口氣,批我是中國政府的走狗。我與您素不相識,您居然說我的動機 not honorable,我就不起訴您了。希望裴鋼以我為榜樣,不因為您高級黑他而起訴您。
(1)iScience中,FigureS4B,雖然文章聲稱,"all receptors exhibited preferential localization on cell membranes",但是Figure4B truncated CCR5明顯信號駐留在胞漿中,不在膜上,這說明敲除兩跨膜區后,上膜明顯受影響。這一點與裴老師Figure2C矛盾。
(2)iScience中,Figure 5A,B,D,E,鈣成像實驗,他們的實驗不能說刺激出來了鈣信號,A,D兩圖WT full length receptor的熒光曲線error bar太大了(他們這里故意把error bar變成灰白色,細看會發現bar很大,難有統計學意義的),他們實驗陽性對照就不明顯(文中鈣成像用酶標板做的,他們需要進一步學習怎么做鈣成像)。即便如此,Figure 5 B, E truncated receptor的鈣信號也明顯降低,Figure 5E甚至可以說truncated receptor鈣信號消失,這更不支持裴老師PNAS Figure 3D。
發件人: Shuguang Zhang
日期: Friday, January 22, 2021 at 11:58 AM
至: Transmissome
抄送: "oy@itp.ac.cn", "mgzhai@mail.iggcas.ac.cn", Huanming Yang, Boqing Qiang, Bai Chunli, 曹京華
主題: A letter to Dr. Rao Yi concerning your extremely careless accusation of Dr. 裴鋼 and colleagues' 1999 PNAS paper without familiarity with the literature
Dr. Rao Yi,
I take liberty to write you a rebuttal letter concerning your extremely careless accusation of Dr. 裴鋼 and colleagues' 1999 PNAS paper without familiarity with the literature.
I am greatly alarmed by your critical accusation of Dr. 裴鋼 and his colleagues’ 1999 publication in PNAS without carefully reading the scientific literature. Your accusation is not only incorrect, but the motivation for making such an accusation without proof cannot be honorably explained or justified, especially you are an UCSF and Harvard-trainedscientist.In support of Dr. 裴鋼’s scientific results, I refer you to my laboratory’s work of several years. Our results are reported in “Non-full-length Water-Soluble CXCR4QTY and CCR5QTY Chemokine Receptors: Implication for Overlooked Truncated but Functional Membrane Receptors” in iScience, Cell Press in 2020. Our paper not only confirms the work carried out by Ling et al., “Five-transmembrane domains appear sufficient for a G protein-coupled receptor: Functional five-transmembrane domain chemokine receptors” PNAS 1999, but we also show unequivocally that CXCR4 and CCR5 with only 2 or 3 transmembrane segments demonstrate ligand binding both in vitro, and located on cell plasma membrane, and carried out cell signaling. Our data, and the work of others, directly support the conclusion by Ling et al in their 1999 PNAS paper. In fact, our work was carried out on the identical protein from totally different perspectives. It appears you are also unaware of the comprehensive review of Dr. Helen Wise, “The roles played by highly truncated splice variants of G protein-coupled receptors” J. Mol. Signal., 7, 13 (2012). In this review paper, Dr. Wise listed many such truncated but functional receptors. It is surprising you would launch such a serious accusation without at least reading the literature.
Your accusation without familiarity with the literature is totally irresponsible, both scientifically and ethically. As an UCSF and Harvard-trained scientist, faculty member at Washington University and Northwestern University, you certainly understand that any allegation or accusation must be based on valid scientific evidence. It is reckless and extremely damaging to the scientific reputation and career of those being accused, especially to younger scientists.
I believe your accusation is entirely without merit, and that you must sincerely and openly apologize to Dr. 裴鋼 and his colleagues.
I fully support efforts to root out actual scientific misconduct at every level in China both students and academicians. Documented misconduct is extremely damaging to China’s scientific reputation and standing in the world. However, all allegations and accusations must be based on facts.
Please see my rebuttal letter to put the matter in a new light.
Please see our recent publication, MIT News other people’s comments:
Qing, R., Tao, F., Han, Q., Chung, H., Ni, J., Suter, B., Kubicek, J., Maertens, B., Schubert, T. & Zhang, S. (2020) Non-full-length water-soluble CXCR4QTY, CCR5QTY chemokine receptors and implication for overlooked truncated membrane receptors iScience, Cell Press. DOI:https://doi.org/10.1016/j.isci.2020.101670
MIT News: Truncated immune system receptors may regulate cellular activity