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Govindaraj Jayanthy Balachander Sorimuthupillai Subramanian Kaliappan Ilango 《RSC advances》2018,8(47):26656
Non-alcoholic fatty acid disease (NAFLD) has become an emerging entity of liver disorders worldwide. Oxidative stress and deranged autophagy-induced endoplasmic reticulum (ER) stress has recently been recognized as one of the prime factors involved in the pathological mechanism underlying NAFLD and progressive non-alcoholic steato-hepatitis (NASH). Epidemiological and experimental data reveal the potency of dietary polyphenols in averting NAFLD. In this line, to analyse and address the underlying pathogenic mechanisms, in the present study, oleic acid-induced HepG2 cells were treated with rosmarinic acid (RA), a dietary polyphenol with well-established cytoprotective properties. Treatment with rosmarinic acid (20 μg) was found to potently counter the elevated levels of total cholesterol (TC) and triglycerides (TG). Additionally, exposure of oleic acid-induced HepG2 cells to rosmarinic acid showed reduced levels of ROS and increased activity of enzymic and non-enzymic antioxidants. The steatotic HepG2 cells presented a pronounced increase in the expression of key ER stress markers such as p-PERK, p-IRE-1, ATF-6, p-eIF-α and CHOP, which was considerably reduced upon treatment with rosmarinic acid. Moreover, exposure to rosmarinic acid altered the deranged autophagic mechanism in oleic acid-induced HepG2 cells, which was observed via the protein expression of Beclin 1, LC31, ATG5 and ATG7. This study demonstrates that rosmarinic acid abrogates NAFLD via diminishing ER stress by nullifying oxidative stress and restoring deranged autophagy and can be used as a potent adjunct in the treatment of NAFLD, thus illustrating the valuable application of polyphenols in combating NAFLD.Non-alcoholic fatty acid disease (NAFLD) has become an emerging entity of liver disorders worldwide. 相似文献
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Increased frequency of late‐senescent T cells lacking CD127 in chronic hepatitis C disease 下载免费PDF全文
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Sankaranarayanan Kaliappan Donald A. Simone Ratan K. Banik 《The journal of pain》2018,19(9):1015-1023
The under-reporting of pain and atypical manifestations of painful syndromes within the elderly population have been well documented, however, the specific relationship between pain and aging remains ambiguous. Previous studies have reported degenerative changes in primary afferents with aging. In this study, we questioned whether there is any change in the density of primary afferent endings within the epidermis of aged animals. Rats were categorically assessed in 4 age groups, each representing a key developmental stage across their life span: juvenile (2 months), adult (7 months); aged (18 months), and senescent (24–26 months). The plantar hind paw skin was removed, post-fixed, cut, and immunostained for protein gene product 9.5 and type IV collagen. Rats in the adult aged groups had significantly increased epidermal nerve densities and total lengths of immunoreactive nerve fibers, compared with juvenile as well as senescent rats. However, the paw withdrawal thresholds to punctate mechanical stimulation progressively increased with age, and did not exhibit a clear relationship with epidermal innervation. We conclude a nonlinear, inverted-U shaped relationship between rat plantar epidermal nerve density with aging, which does not correlate with mechanically-induced paw withdrawal behaviors.
Perspective
This article presents age-related decreased epidermal innervation in rat hind paw skin, which partly explains mechanisms underlying decreased pain sensitivity in aged subjects. The report may help clinicians to understand that any compromise of pain-sensing pathway can lead to under-reporting of pain, inadequate analgesia, and slower recovery from a painful condition. 相似文献6.
Suryavathi V Khattri A Gopal K Rani DS Panneerdoss S Gupta NJ Chakravarty B Deenadayal M Singh L Thangaraj K 《Journal of andrology》2008,29(5):564-571
The UBE2B gene encodes ubiquitin-conjugating enzyme, which is involved in DNA repair. Ube2b knockout mice were found to be infertile because of structural abnormality of sperm. However, there is no genetic study on the role of the UBE2B gene in human fertility; therefore, the present investigation was designed to study genetic variations in the UBE2B gene and its role in human male infertility. Sequence analyses of the UBE2B gene in 530 infertile (350 azoospermic, 105 oligoasthenoteratozoospermic, and 75 oligoasthenozoospermic) and 300 fertile control men revealed the presence of 5 substitution single-nucleotide polymorphisms (SNPs) in 221 individuals (199 infertile [37.5%] and 22 fertile [7.3%] men). Of these, 2 (g.5197:T>G; g.9157:A>G) of the 5 substitutions were novel and observed only in infertile men. Distribution of haplotypes TA, TG, GA, and GG are not uniform between the patient and the control group of this study. Interestingly, our study suggests that the haplotype TG conferred significantly increased risk for male infertility (odds ratio = 5.07, 95% CI = 1.29-23.29, p = .007). In silico analysis of SNPs that were specific to infertile men predicted that these SNPs lead to defective splicing by destroying or creating the potential binding site of splicing factors or causing alteration in predicted regulatory sequences. In the light of the above, our study suggests that the UBE2B gene is associated with male infertility in Indian men, hence, providing evidence for additional genetic factors for male infertility. 相似文献
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Mohankumar R Ilango K Santhanakrishnan VP Radhakrishnan V Narasimhan S 《Journal of Asian natural products research》2010,12(10):851-858
The use of ethylenediamine in methanol is described for the selective cleavage of the acetate group in nimbin (1) to 6-deacetyl nimbin (1a) under microwave irradiation. This method enables to deacetylate without affecting other functional groups such as α,β-unsaturated ketone, ester, ether, etc. in certain tetranortriterpenoids and other acetate-containing natural compounds. 相似文献
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