Kidney Yin deficiency pattern (KYD) (KYD)

Kidney Yin deficiency (KYD) is a fundamental pathological pattern in Traditional Chinese Medicine (TCM) characterized by a loss of the body's cooling and nourishing fluids, leading to symptoms of "empty heat" such as night sweats, hot flashes, and dizziness. While not a single molecular target, KYD correction involves therapeutic strategies aimed at restoring systemic homeostasis, particularly within the neuro-endocrine-immune (NEI) network [PubMed: 28652831]. Research indicates that KYD is associated with dysregulation of the hypothalamic-pituitary-adrenal (HPA) and hypothalamic-pituitary-gonadal (HPG) axes, as well as oxidative stress and metabolic imbalances [PubMed: 23634144]. Drugs used for correction, such as the herbal formula Liuwei Dihuang Wan, act by modulating hormone levels, enhancing antioxidant capacity, and regulating gene expression related to energy metabolism [PubMed: 26904168]. Consequently, KYD correction represents a multi-target, systemic approach to treating chronic conditions like menopause, diabetes, and age-related decline. Molecular markers often cited in the study of this pattern include the ratio of cyclic adenosine monophosphate (cAMP) to cyclic guanosine monophosphate (cGMP) [PubMed: 17663128].

Other names

Kidney-Yin deficiency syndromeShen-Yin deficiencyKYDSKidney Yin deficiency pattern

Correction involves tonifying Kidney Yin to restore the balance of the neuro-endocrine-immune (NEI) network, often by modulating the HPA axis and antioxidant pathways [PubMed: 28652831, PubMed: 23634144].